1 /* 2 ** 2001 September 15 3 ** 4 ** The author disclaims copyright to this source code. In place of 5 ** a legal notice, here is a blessing: 6 ** 7 ** May you do good and not evil. 8 ** May you find forgiveness for yourself and forgive others. 9 ** May you share freely, never taking more than you give. 10 ** 11 ************************************************************************* 12 ** Internal interface definitions for SQLite. 13 ** 14 */ 15 #ifndef SQLITEINT_H 16 #define SQLITEINT_H 17 18 /* Special Comments: 19 ** 20 ** Some comments have special meaning to the tools that measure test 21 ** coverage: 22 ** 23 ** NO_TEST - The branches on this line are not 24 ** measured by branch coverage. This is 25 ** used on lines of code that actually 26 ** implement parts of coverage testing. 27 ** 28 ** OPTIMIZATION-IF-TRUE - This branch is allowed to alway be false 29 ** and the correct answer is still obtained, 30 ** though perhaps more slowly. 31 ** 32 ** OPTIMIZATION-IF-FALSE - This branch is allowed to alway be true 33 ** and the correct answer is still obtained, 34 ** though perhaps more slowly. 35 ** 36 ** PREVENTS-HARMLESS-OVERREAD - This branch prevents a buffer overread 37 ** that would be harmless and undetectable 38 ** if it did occur. 39 ** 40 ** In all cases, the special comment must be enclosed in the usual 41 ** slash-asterisk...asterisk-slash comment marks, with no spaces between the 42 ** asterisks and the comment text. 43 */ 44 45 /* 46 ** Make sure the Tcl calling convention macro is defined. This macro is 47 ** only used by test code and Tcl integration code. 48 */ 49 #ifndef SQLITE_TCLAPI 50 # define SQLITE_TCLAPI 51 #endif 52 53 /* 54 ** Include the header file used to customize the compiler options for MSVC. 55 ** This should be done first so that it can successfully prevent spurious 56 ** compiler warnings due to subsequent content in this file and other files 57 ** that are included by this file. 58 */ 59 #include "msvc.h" 60 61 /* 62 ** Special setup for VxWorks 63 */ 64 #include "vxworks.h" 65 66 /* 67 ** These #defines should enable >2GB file support on POSIX if the 68 ** underlying operating system supports it. If the OS lacks 69 ** large file support, or if the OS is windows, these should be no-ops. 70 ** 71 ** Ticket #2739: The _LARGEFILE_SOURCE macro must appear before any 72 ** system #includes. Hence, this block of code must be the very first 73 ** code in all source files. 74 ** 75 ** Large file support can be disabled using the -DSQLITE_DISABLE_LFS switch 76 ** on the compiler command line. This is necessary if you are compiling 77 ** on a recent machine (ex: Red Hat 7.2) but you want your code to work 78 ** on an older machine (ex: Red Hat 6.0). If you compile on Red Hat 7.2 79 ** without this option, LFS is enable. But LFS does not exist in the kernel 80 ** in Red Hat 6.0, so the code won't work. Hence, for maximum binary 81 ** portability you should omit LFS. 82 ** 83 ** The previous paragraph was written in 2005. (This paragraph is written 84 ** on 2008-11-28.) These days, all Linux kernels support large files, so 85 ** you should probably leave LFS enabled. But some embedded platforms might 86 ** lack LFS in which case the SQLITE_DISABLE_LFS macro might still be useful. 87 ** 88 ** Similar is true for Mac OS X. LFS is only supported on Mac OS X 9 and later. 89 */ 90 #ifndef SQLITE_DISABLE_LFS 91 # define _LARGE_FILE 1 92 # ifndef _FILE_OFFSET_BITS 93 # define _FILE_OFFSET_BITS 64 94 # endif 95 # define _LARGEFILE_SOURCE 1 96 #endif 97 98 /* The GCC_VERSION and MSVC_VERSION macros are used to 99 ** conditionally include optimizations for each of these compilers. A 100 ** value of 0 means that compiler is not being used. The 101 ** SQLITE_DISABLE_INTRINSIC macro means do not use any compiler-specific 102 ** optimizations, and hence set all compiler macros to 0 103 ** 104 ** There was once also a CLANG_VERSION macro. However, we learn that the 105 ** version numbers in clang are for "marketing" only and are inconsistent 106 ** and unreliable. Fortunately, all versions of clang also recognize the 107 ** gcc version numbers and have reasonable settings for gcc version numbers, 108 ** so the GCC_VERSION macro will be set to a correct non-zero value even 109 ** when compiling with clang. 110 */ 111 #if defined(__GNUC__) && !defined(SQLITE_DISABLE_INTRINSIC) 112 # define GCC_VERSION (__GNUC__*1000000+__GNUC_MINOR__*1000+__GNUC_PATCHLEVEL__) 113 #else 114 # define GCC_VERSION 0 115 #endif 116 #if defined(_MSC_VER) && !defined(SQLITE_DISABLE_INTRINSIC) 117 # define MSVC_VERSION _MSC_VER 118 #else 119 # define MSVC_VERSION 0 120 #endif 121 122 /* 123 ** Some C99 functions in "math.h" are only present for MSVC when its version 124 ** is associated with Visual Studio 2013 or higher. 125 */ 126 #ifndef SQLITE_HAVE_C99_MATH_FUNCS 127 # if MSVC_VERSION==0 || MSVC_VERSION>=1800 128 # define SQLITE_HAVE_C99_MATH_FUNCS (1) 129 # else 130 # define SQLITE_HAVE_C99_MATH_FUNCS (0) 131 # endif 132 #endif 133 134 /* Needed for various definitions... */ 135 #if defined(__GNUC__) && !defined(_GNU_SOURCE) 136 # define _GNU_SOURCE 137 #endif 138 139 #if defined(__OpenBSD__) && !defined(_BSD_SOURCE) 140 # define _BSD_SOURCE 141 #endif 142 143 /* 144 ** Macro to disable warnings about missing "break" at the end of a "case". 145 */ 146 #if GCC_VERSION>=7000000 147 # define deliberate_fall_through __attribute__((fallthrough)); 148 #else 149 # define deliberate_fall_through 150 #endif 151 152 /* 153 ** For MinGW, check to see if we can include the header file containing its 154 ** version information, among other things. Normally, this internal MinGW 155 ** header file would [only] be included automatically by other MinGW header 156 ** files; however, the contained version information is now required by this 157 ** header file to work around binary compatibility issues (see below) and 158 ** this is the only known way to reliably obtain it. This entire #if block 159 ** would be completely unnecessary if there was any other way of detecting 160 ** MinGW via their preprocessor (e.g. if they customized their GCC to define 161 ** some MinGW-specific macros). When compiling for MinGW, either the 162 ** _HAVE_MINGW_H or _HAVE__MINGW_H (note the extra underscore) macro must be 163 ** defined; otherwise, detection of conditions specific to MinGW will be 164 ** disabled. 165 */ 166 #if defined(_HAVE_MINGW_H) 167 # include "mingw.h" 168 #elif defined(_HAVE__MINGW_H) 169 # include "_mingw.h" 170 #endif 171 172 /* 173 ** For MinGW version 4.x (and higher), check to see if the _USE_32BIT_TIME_T 174 ** define is required to maintain binary compatibility with the MSVC runtime 175 ** library in use (e.g. for Windows XP). 176 */ 177 #if !defined(_USE_32BIT_TIME_T) && !defined(_USE_64BIT_TIME_T) && \ 178 defined(_WIN32) && !defined(_WIN64) && \ 179 defined(__MINGW_MAJOR_VERSION) && __MINGW_MAJOR_VERSION >= 4 && \ 180 defined(__MSVCRT__) 181 # define _USE_32BIT_TIME_T 182 #endif 183 184 /* Optionally #include a user-defined header, whereby compilation options 185 ** may be set prior to where they take effect, but after platform setup. 186 ** If SQLITE_CUSTOM_INCLUDE=? is defined, its value names the #include 187 ** file. 188 */ 189 #ifdef SQLITE_CUSTOM_INCLUDE 190 # define INC_STRINGIFY_(f) #f 191 # define INC_STRINGIFY(f) INC_STRINGIFY_(f) 192 # include INC_STRINGIFY(SQLITE_CUSTOM_INCLUDE) 193 #endif 194 195 /* The public SQLite interface. The _FILE_OFFSET_BITS macro must appear 196 ** first in QNX. Also, the _USE_32BIT_TIME_T macro must appear first for 197 ** MinGW. 198 */ 199 #include "sqlite3.h" 200 201 /* 202 ** Include the configuration header output by 'configure' if we're using the 203 ** autoconf-based build 204 */ 205 #if defined(_HAVE_SQLITE_CONFIG_H) && !defined(SQLITECONFIG_H) 206 #include "config.h" 207 #define SQLITECONFIG_H 1 208 #endif 209 210 #include "sqliteLimit.h" 211 212 /* Disable nuisance warnings on Borland compilers */ 213 #if defined(__BORLANDC__) 214 #pragma warn -rch /* unreachable code */ 215 #pragma warn -ccc /* Condition is always true or false */ 216 #pragma warn -aus /* Assigned value is never used */ 217 #pragma warn -csu /* Comparing signed and unsigned */ 218 #pragma warn -spa /* Suspicious pointer arithmetic */ 219 #endif 220 221 /* 222 ** WAL mode depends on atomic aligned 32-bit loads and stores in a few 223 ** places. The following macros try to make this explicit. 224 */ 225 #ifndef __has_extension 226 # define __has_extension(x) 0 /* compatibility with non-clang compilers */ 227 #endif 228 #if GCC_VERSION>=4007000 || __has_extension(c_atomic) 229 # define SQLITE_ATOMIC_INTRINSICS 1 230 # define AtomicLoad(PTR) __atomic_load_n((PTR),__ATOMIC_RELAXED) 231 # define AtomicStore(PTR,VAL) __atomic_store_n((PTR),(VAL),__ATOMIC_RELAXED) 232 #else 233 # define SQLITE_ATOMIC_INTRINSICS 0 234 # define AtomicLoad(PTR) (*(PTR)) 235 # define AtomicStore(PTR,VAL) (*(PTR) = (VAL)) 236 #endif 237 238 /* 239 ** Include standard header files as necessary 240 */ 241 #ifdef HAVE_STDINT_H 242 #include <stdint.h> 243 #endif 244 #ifdef HAVE_INTTYPES_H 245 #include <inttypes.h> 246 #endif 247 248 /* 249 ** The following macros are used to cast pointers to integers and 250 ** integers to pointers. The way you do this varies from one compiler 251 ** to the next, so we have developed the following set of #if statements 252 ** to generate appropriate macros for a wide range of compilers. 253 ** 254 ** The correct "ANSI" way to do this is to use the intptr_t type. 255 ** Unfortunately, that typedef is not available on all compilers, or 256 ** if it is available, it requires an #include of specific headers 257 ** that vary from one machine to the next. 258 ** 259 ** Ticket #3860: The llvm-gcc-4.2 compiler from Apple chokes on 260 ** the ((void*)&((char*)0)[X]) construct. But MSVC chokes on ((void*)(X)). 261 ** So we have to define the macros in different ways depending on the 262 ** compiler. 263 */ 264 #if defined(HAVE_STDINT_H) /* Use this case if we have ANSI headers */ 265 # define SQLITE_INT_TO_PTR(X) ((void*)(intptr_t)(X)) 266 # define SQLITE_PTR_TO_INT(X) ((int)(intptr_t)(X)) 267 #elif defined(__PTRDIFF_TYPE__) /* This case should work for GCC */ 268 # define SQLITE_INT_TO_PTR(X) ((void*)(__PTRDIFF_TYPE__)(X)) 269 # define SQLITE_PTR_TO_INT(X) ((int)(__PTRDIFF_TYPE__)(X)) 270 #elif !defined(__GNUC__) /* Works for compilers other than LLVM */ 271 # define SQLITE_INT_TO_PTR(X) ((void*)&((char*)0)[X]) 272 # define SQLITE_PTR_TO_INT(X) ((int)(((char*)X)-(char*)0)) 273 #else /* Generates a warning - but it always works */ 274 # define SQLITE_INT_TO_PTR(X) ((void*)(X)) 275 # define SQLITE_PTR_TO_INT(X) ((int)(X)) 276 #endif 277 278 /* 279 ** A macro to hint to the compiler that a function should not be 280 ** inlined. 281 */ 282 #if defined(__GNUC__) 283 # define SQLITE_NOINLINE __attribute__((noinline)) 284 #elif defined(_MSC_VER) && _MSC_VER>=1310 285 # define SQLITE_NOINLINE __declspec(noinline) 286 #else 287 # define SQLITE_NOINLINE 288 #endif 289 290 /* 291 ** Make sure that the compiler intrinsics we desire are enabled when 292 ** compiling with an appropriate version of MSVC unless prevented by 293 ** the SQLITE_DISABLE_INTRINSIC define. 294 */ 295 #if !defined(SQLITE_DISABLE_INTRINSIC) 296 # if defined(_MSC_VER) && _MSC_VER>=1400 297 # if !defined(_WIN32_WCE) 298 # include <intrin.h> 299 # pragma intrinsic(_byteswap_ushort) 300 # pragma intrinsic(_byteswap_ulong) 301 # pragma intrinsic(_byteswap_uint64) 302 # pragma intrinsic(_ReadWriteBarrier) 303 # else 304 # include <cmnintrin.h> 305 # endif 306 # endif 307 #endif 308 309 /* 310 ** The SQLITE_THREADSAFE macro must be defined as 0, 1, or 2. 311 ** 0 means mutexes are permanently disable and the library is never 312 ** threadsafe. 1 means the library is serialized which is the highest 313 ** level of threadsafety. 2 means the library is multithreaded - multiple 314 ** threads can use SQLite as long as no two threads try to use the same 315 ** database connection at the same time. 316 ** 317 ** Older versions of SQLite used an optional THREADSAFE macro. 318 ** We support that for legacy. 319 ** 320 ** To ensure that the correct value of "THREADSAFE" is reported when querying 321 ** for compile-time options at runtime (e.g. "PRAGMA compile_options"), this 322 ** logic is partially replicated in ctime.c. If it is updated here, it should 323 ** also be updated there. 324 */ 325 #if !defined(SQLITE_THREADSAFE) 326 # if defined(THREADSAFE) 327 # define SQLITE_THREADSAFE THREADSAFE 328 # else 329 # define SQLITE_THREADSAFE 1 /* IMP: R-07272-22309 */ 330 # endif 331 #endif 332 333 /* 334 ** Powersafe overwrite is on by default. But can be turned off using 335 ** the -DSQLITE_POWERSAFE_OVERWRITE=0 command-line option. 336 */ 337 #ifndef SQLITE_POWERSAFE_OVERWRITE 338 # define SQLITE_POWERSAFE_OVERWRITE 1 339 #endif 340 341 /* 342 ** EVIDENCE-OF: R-25715-37072 Memory allocation statistics are enabled by 343 ** default unless SQLite is compiled with SQLITE_DEFAULT_MEMSTATUS=0 in 344 ** which case memory allocation statistics are disabled by default. 345 */ 346 #if !defined(SQLITE_DEFAULT_MEMSTATUS) 347 # define SQLITE_DEFAULT_MEMSTATUS 1 348 #endif 349 350 /* 351 ** Exactly one of the following macros must be defined in order to 352 ** specify which memory allocation subsystem to use. 353 ** 354 ** SQLITE_SYSTEM_MALLOC // Use normal system malloc() 355 ** SQLITE_WIN32_MALLOC // Use Win32 native heap API 356 ** SQLITE_ZERO_MALLOC // Use a stub allocator that always fails 357 ** SQLITE_MEMDEBUG // Debugging version of system malloc() 358 ** 359 ** On Windows, if the SQLITE_WIN32_MALLOC_VALIDATE macro is defined and the 360 ** assert() macro is enabled, each call into the Win32 native heap subsystem 361 ** will cause HeapValidate to be called. If heap validation should fail, an 362 ** assertion will be triggered. 363 ** 364 ** If none of the above are defined, then set SQLITE_SYSTEM_MALLOC as 365 ** the default. 366 */ 367 #if defined(SQLITE_SYSTEM_MALLOC) \ 368 + defined(SQLITE_WIN32_MALLOC) \ 369 + defined(SQLITE_ZERO_MALLOC) \ 370 + defined(SQLITE_MEMDEBUG)>1 371 # error "Two or more of the following compile-time configuration options\ 372 are defined but at most one is allowed:\ 373 SQLITE_SYSTEM_MALLOC, SQLITE_WIN32_MALLOC, SQLITE_MEMDEBUG,\ 374 SQLITE_ZERO_MALLOC" 375 #endif 376 #if defined(SQLITE_SYSTEM_MALLOC) \ 377 + defined(SQLITE_WIN32_MALLOC) \ 378 + defined(SQLITE_ZERO_MALLOC) \ 379 + defined(SQLITE_MEMDEBUG)==0 380 # define SQLITE_SYSTEM_MALLOC 1 381 #endif 382 383 /* 384 ** If SQLITE_MALLOC_SOFT_LIMIT is not zero, then try to keep the 385 ** sizes of memory allocations below this value where possible. 386 */ 387 #if !defined(SQLITE_MALLOC_SOFT_LIMIT) 388 # define SQLITE_MALLOC_SOFT_LIMIT 1024 389 #endif 390 391 /* 392 ** We need to define _XOPEN_SOURCE as follows in order to enable 393 ** recursive mutexes on most Unix systems and fchmod() on OpenBSD. 394 ** But _XOPEN_SOURCE define causes problems for Mac OS X, so omit 395 ** it. 396 */ 397 #if !defined(_XOPEN_SOURCE) && !defined(__DARWIN__) && !defined(__APPLE__) 398 # define _XOPEN_SOURCE 600 399 #endif 400 401 /* 402 ** NDEBUG and SQLITE_DEBUG are opposites. It should always be true that 403 ** defined(NDEBUG)==!defined(SQLITE_DEBUG). If this is not currently true, 404 ** make it true by defining or undefining NDEBUG. 405 ** 406 ** Setting NDEBUG makes the code smaller and faster by disabling the 407 ** assert() statements in the code. So we want the default action 408 ** to be for NDEBUG to be set and NDEBUG to be undefined only if SQLITE_DEBUG 409 ** is set. Thus NDEBUG becomes an opt-in rather than an opt-out 410 ** feature. 411 */ 412 #if !defined(NDEBUG) && !defined(SQLITE_DEBUG) 413 # define NDEBUG 1 414 #endif 415 #if defined(NDEBUG) && defined(SQLITE_DEBUG) 416 # undef NDEBUG 417 #endif 418 419 /* 420 ** Enable SQLITE_ENABLE_EXPLAIN_COMMENTS if SQLITE_DEBUG is turned on. 421 */ 422 #if !defined(SQLITE_ENABLE_EXPLAIN_COMMENTS) && defined(SQLITE_DEBUG) 423 # define SQLITE_ENABLE_EXPLAIN_COMMENTS 1 424 #endif 425 426 /* 427 ** The testcase() macro is used to aid in coverage testing. When 428 ** doing coverage testing, the condition inside the argument to 429 ** testcase() must be evaluated both true and false in order to 430 ** get full branch coverage. The testcase() macro is inserted 431 ** to help ensure adequate test coverage in places where simple 432 ** condition/decision coverage is inadequate. For example, testcase() 433 ** can be used to make sure boundary values are tested. For 434 ** bitmask tests, testcase() can be used to make sure each bit 435 ** is significant and used at least once. On switch statements 436 ** where multiple cases go to the same block of code, testcase() 437 ** can insure that all cases are evaluated. 438 ** 439 */ 440 #ifdef SQLITE_COVERAGE_TEST 441 void sqlite3Coverage(int); 442 # define testcase(X) if( X ){ sqlite3Coverage(__LINE__); } 443 #else 444 # define testcase(X) 445 #endif 446 447 /* 448 ** The TESTONLY macro is used to enclose variable declarations or 449 ** other bits of code that are needed to support the arguments 450 ** within testcase() and assert() macros. 451 */ 452 #if !defined(NDEBUG) || defined(SQLITE_COVERAGE_TEST) 453 # define TESTONLY(X) X 454 #else 455 # define TESTONLY(X) 456 #endif 457 458 /* 459 ** Sometimes we need a small amount of code such as a variable initialization 460 ** to setup for a later assert() statement. We do not want this code to 461 ** appear when assert() is disabled. The following macro is therefore 462 ** used to contain that setup code. The "VVA" acronym stands for 463 ** "Verification, Validation, and Accreditation". In other words, the 464 ** code within VVA_ONLY() will only run during verification processes. 465 */ 466 #ifndef NDEBUG 467 # define VVA_ONLY(X) X 468 #else 469 # define VVA_ONLY(X) 470 #endif 471 472 /* 473 ** Disable ALWAYS() and NEVER() (make them pass-throughs) for coverage 474 ** and mutation testing 475 */ 476 #if defined(SQLITE_COVERAGE_TEST) || defined(SQLITE_MUTATION_TEST) 477 # define SQLITE_OMIT_AUXILIARY_SAFETY_CHECKS 1 478 #endif 479 480 /* 481 ** The ALWAYS and NEVER macros surround boolean expressions which 482 ** are intended to always be true or false, respectively. Such 483 ** expressions could be omitted from the code completely. But they 484 ** are included in a few cases in order to enhance the resilience 485 ** of SQLite to unexpected behavior - to make the code "self-healing" 486 ** or "ductile" rather than being "brittle" and crashing at the first 487 ** hint of unplanned behavior. 488 ** 489 ** In other words, ALWAYS and NEVER are added for defensive code. 490 ** 491 ** When doing coverage testing ALWAYS and NEVER are hard-coded to 492 ** be true and false so that the unreachable code they specify will 493 ** not be counted as untested code. 494 */ 495 #if defined(SQLITE_OMIT_AUXILIARY_SAFETY_CHECKS) 496 # define ALWAYS(X) (1) 497 # define NEVER(X) (0) 498 #elif !defined(NDEBUG) 499 # define ALWAYS(X) ((X)?1:(assert(0),0)) 500 # define NEVER(X) ((X)?(assert(0),1):0) 501 #else 502 # define ALWAYS(X) (X) 503 # define NEVER(X) (X) 504 #endif 505 506 /* 507 ** Some conditionals are optimizations only. In other words, if the 508 ** conditionals are replaced with a constant 1 (true) or 0 (false) then 509 ** the correct answer is still obtained, though perhaps not as quickly. 510 ** 511 ** The following macros mark these optimizations conditionals. 512 */ 513 #if defined(SQLITE_MUTATION_TEST) 514 # define OK_IF_ALWAYS_TRUE(X) (1) 515 # define OK_IF_ALWAYS_FALSE(X) (0) 516 #else 517 # define OK_IF_ALWAYS_TRUE(X) (X) 518 # define OK_IF_ALWAYS_FALSE(X) (X) 519 #endif 520 521 /* 522 ** Some malloc failures are only possible if SQLITE_TEST_REALLOC_STRESS is 523 ** defined. We need to defend against those failures when testing with 524 ** SQLITE_TEST_REALLOC_STRESS, but we don't want the unreachable branches 525 ** during a normal build. The following macro can be used to disable tests 526 ** that are always false except when SQLITE_TEST_REALLOC_STRESS is set. 527 */ 528 #if defined(SQLITE_TEST_REALLOC_STRESS) 529 # define ONLY_IF_REALLOC_STRESS(X) (X) 530 #elif !defined(NDEBUG) 531 # define ONLY_IF_REALLOC_STRESS(X) ((X)?(assert(0),1):0) 532 #else 533 # define ONLY_IF_REALLOC_STRESS(X) (0) 534 #endif 535 536 /* 537 ** Declarations used for tracing the operating system interfaces. 538 */ 539 #if defined(SQLITE_FORCE_OS_TRACE) || defined(SQLITE_TEST) || \ 540 (defined(SQLITE_DEBUG) && SQLITE_OS_WIN) 541 extern int sqlite3OSTrace; 542 # define OSTRACE(X) if( sqlite3OSTrace ) sqlite3DebugPrintf X 543 # define SQLITE_HAVE_OS_TRACE 544 #else 545 # define OSTRACE(X) 546 # undef SQLITE_HAVE_OS_TRACE 547 #endif 548 549 /* 550 ** Is the sqlite3ErrName() function needed in the build? Currently, 551 ** it is needed by "mutex_w32.c" (when debugging), "os_win.c" (when 552 ** OSTRACE is enabled), and by several "test*.c" files (which are 553 ** compiled using SQLITE_TEST). 554 */ 555 #if defined(SQLITE_HAVE_OS_TRACE) || defined(SQLITE_TEST) || \ 556 (defined(SQLITE_DEBUG) && SQLITE_OS_WIN) 557 # define SQLITE_NEED_ERR_NAME 558 #else 559 # undef SQLITE_NEED_ERR_NAME 560 #endif 561 562 /* 563 ** SQLITE_ENABLE_EXPLAIN_COMMENTS is incompatible with SQLITE_OMIT_EXPLAIN 564 */ 565 #ifdef SQLITE_OMIT_EXPLAIN 566 # undef SQLITE_ENABLE_EXPLAIN_COMMENTS 567 #endif 568 569 /* 570 ** SQLITE_OMIT_VIRTUALTABLE implies SQLITE_OMIT_ALTERTABLE 571 */ 572 #if defined(SQLITE_OMIT_VIRTUALTABLE) && !defined(SQLITE_OMIT_ALTERTABLE) 573 # define SQLITE_OMIT_ALTERTABLE 574 #endif 575 576 /* 577 ** Return true (non-zero) if the input is an integer that is too large 578 ** to fit in 32-bits. This macro is used inside of various testcase() 579 ** macros to verify that we have tested SQLite for large-file support. 580 */ 581 #define IS_BIG_INT(X) (((X)&~(i64)0xffffffff)!=0) 582 583 /* 584 ** The macro unlikely() is a hint that surrounds a boolean 585 ** expression that is usually false. Macro likely() surrounds 586 ** a boolean expression that is usually true. These hints could, 587 ** in theory, be used by the compiler to generate better code, but 588 ** currently they are just comments for human readers. 589 */ 590 #define likely(X) (X) 591 #define unlikely(X) (X) 592 593 #include "hash.h" 594 #include "parse.h" 595 #include <stdio.h> 596 #include <stdlib.h> 597 #include <string.h> 598 #include <assert.h> 599 #include <stddef.h> 600 601 /* 602 ** Use a macro to replace memcpy() if compiled with SQLITE_INLINE_MEMCPY. 603 ** This allows better measurements of where memcpy() is used when running 604 ** cachegrind. But this macro version of memcpy() is very slow so it 605 ** should not be used in production. This is a performance measurement 606 ** hack only. 607 */ 608 #ifdef SQLITE_INLINE_MEMCPY 609 # define memcpy(D,S,N) {char*xxd=(char*)(D);const char*xxs=(const char*)(S);\ 610 int xxn=(N);while(xxn-->0)*(xxd++)=*(xxs++);} 611 #endif 612 613 /* 614 ** If compiling for a processor that lacks floating point support, 615 ** substitute integer for floating-point 616 */ 617 #ifdef SQLITE_OMIT_FLOATING_POINT 618 # define double sqlite_int64 619 # define float sqlite_int64 620 # define LONGDOUBLE_TYPE sqlite_int64 621 # ifndef SQLITE_BIG_DBL 622 # define SQLITE_BIG_DBL (((sqlite3_int64)1)<<50) 623 # endif 624 # define SQLITE_OMIT_DATETIME_FUNCS 1 625 # define SQLITE_OMIT_TRACE 1 626 # undef SQLITE_MIXED_ENDIAN_64BIT_FLOAT 627 # undef SQLITE_HAVE_ISNAN 628 #endif 629 #ifndef SQLITE_BIG_DBL 630 # define SQLITE_BIG_DBL (1e99) 631 #endif 632 633 /* 634 ** OMIT_TEMPDB is set to 1 if SQLITE_OMIT_TEMPDB is defined, or 0 635 ** afterward. Having this macro allows us to cause the C compiler 636 ** to omit code used by TEMP tables without messy #ifndef statements. 637 */ 638 #ifdef SQLITE_OMIT_TEMPDB 639 #define OMIT_TEMPDB 1 640 #else 641 #define OMIT_TEMPDB 0 642 #endif 643 644 /* 645 ** The "file format" number is an integer that is incremented whenever 646 ** the VDBE-level file format changes. The following macros define the 647 ** the default file format for new databases and the maximum file format 648 ** that the library can read. 649 */ 650 #define SQLITE_MAX_FILE_FORMAT 4 651 #ifndef SQLITE_DEFAULT_FILE_FORMAT 652 # define SQLITE_DEFAULT_FILE_FORMAT 4 653 #endif 654 655 /* 656 ** Determine whether triggers are recursive by default. This can be 657 ** changed at run-time using a pragma. 658 */ 659 #ifndef SQLITE_DEFAULT_RECURSIVE_TRIGGERS 660 # define SQLITE_DEFAULT_RECURSIVE_TRIGGERS 0 661 #endif 662 663 /* 664 ** Provide a default value for SQLITE_TEMP_STORE in case it is not specified 665 ** on the command-line 666 */ 667 #ifndef SQLITE_TEMP_STORE 668 # define SQLITE_TEMP_STORE 1 669 #endif 670 671 /* 672 ** If no value has been provided for SQLITE_MAX_WORKER_THREADS, or if 673 ** SQLITE_TEMP_STORE is set to 3 (never use temporary files), set it 674 ** to zero. 675 */ 676 #if SQLITE_TEMP_STORE==3 || SQLITE_THREADSAFE==0 677 # undef SQLITE_MAX_WORKER_THREADS 678 # define SQLITE_MAX_WORKER_THREADS 0 679 #endif 680 #ifndef SQLITE_MAX_WORKER_THREADS 681 # define SQLITE_MAX_WORKER_THREADS 8 682 #endif 683 #ifndef SQLITE_DEFAULT_WORKER_THREADS 684 # define SQLITE_DEFAULT_WORKER_THREADS 0 685 #endif 686 #if SQLITE_DEFAULT_WORKER_THREADS>SQLITE_MAX_WORKER_THREADS 687 # undef SQLITE_MAX_WORKER_THREADS 688 # define SQLITE_MAX_WORKER_THREADS SQLITE_DEFAULT_WORKER_THREADS 689 #endif 690 691 /* 692 ** The default initial allocation for the pagecache when using separate 693 ** pagecaches for each database connection. A positive number is the 694 ** number of pages. A negative number N translations means that a buffer 695 ** of -1024*N bytes is allocated and used for as many pages as it will hold. 696 ** 697 ** The default value of "20" was choosen to minimize the run-time of the 698 ** speedtest1 test program with options: --shrink-memory --reprepare 699 */ 700 #ifndef SQLITE_DEFAULT_PCACHE_INITSZ 701 # define SQLITE_DEFAULT_PCACHE_INITSZ 20 702 #endif 703 704 /* 705 ** Default value for the SQLITE_CONFIG_SORTERREF_SIZE option. 706 */ 707 #ifndef SQLITE_DEFAULT_SORTERREF_SIZE 708 # define SQLITE_DEFAULT_SORTERREF_SIZE 0x7fffffff 709 #endif 710 711 /* 712 ** The compile-time options SQLITE_MMAP_READWRITE and 713 ** SQLITE_ENABLE_BATCH_ATOMIC_WRITE are not compatible with one another. 714 ** You must choose one or the other (or neither) but not both. 715 */ 716 #if defined(SQLITE_MMAP_READWRITE) && defined(SQLITE_ENABLE_BATCH_ATOMIC_WRITE) 717 #error Cannot use both SQLITE_MMAP_READWRITE and SQLITE_ENABLE_BATCH_ATOMIC_WRITE 718 #endif 719 720 /* 721 ** GCC does not define the offsetof() macro so we'll have to do it 722 ** ourselves. 723 */ 724 #ifndef offsetof 725 #define offsetof(STRUCTURE,FIELD) ((int)((char*)&((STRUCTURE*)0)->FIELD)) 726 #endif 727 728 /* 729 ** Macros to compute minimum and maximum of two numbers. 730 */ 731 #ifndef MIN 732 # define MIN(A,B) ((A)<(B)?(A):(B)) 733 #endif 734 #ifndef MAX 735 # define MAX(A,B) ((A)>(B)?(A):(B)) 736 #endif 737 738 /* 739 ** Swap two objects of type TYPE. 740 */ 741 #define SWAP(TYPE,A,B) {TYPE t=A; A=B; B=t;} 742 743 /* 744 ** Check to see if this machine uses EBCDIC. (Yes, believe it or 745 ** not, there are still machines out there that use EBCDIC.) 746 */ 747 #if 'A' == '\301' 748 # define SQLITE_EBCDIC 1 749 #else 750 # define SQLITE_ASCII 1 751 #endif 752 753 /* 754 ** Integers of known sizes. These typedefs might change for architectures 755 ** where the sizes very. Preprocessor macros are available so that the 756 ** types can be conveniently redefined at compile-type. Like this: 757 ** 758 ** cc '-DUINTPTR_TYPE=long long int' ... 759 */ 760 #ifndef UINT32_TYPE 761 # ifdef HAVE_UINT32_T 762 # define UINT32_TYPE uint32_t 763 # else 764 # define UINT32_TYPE unsigned int 765 # endif 766 #endif 767 #ifndef UINT16_TYPE 768 # ifdef HAVE_UINT16_T 769 # define UINT16_TYPE uint16_t 770 # else 771 # define UINT16_TYPE unsigned short int 772 # endif 773 #endif 774 #ifndef INT16_TYPE 775 # ifdef HAVE_INT16_T 776 # define INT16_TYPE int16_t 777 # else 778 # define INT16_TYPE short int 779 # endif 780 #endif 781 #ifndef UINT8_TYPE 782 # ifdef HAVE_UINT8_T 783 # define UINT8_TYPE uint8_t 784 # else 785 # define UINT8_TYPE unsigned char 786 # endif 787 #endif 788 #ifndef INT8_TYPE 789 # ifdef HAVE_INT8_T 790 # define INT8_TYPE int8_t 791 # else 792 # define INT8_TYPE signed char 793 # endif 794 #endif 795 #ifndef LONGDOUBLE_TYPE 796 # define LONGDOUBLE_TYPE long double 797 #endif 798 typedef sqlite_int64 i64; /* 8-byte signed integer */ 799 typedef sqlite_uint64 u64; /* 8-byte unsigned integer */ 800 typedef UINT32_TYPE u32; /* 4-byte unsigned integer */ 801 typedef UINT16_TYPE u16; /* 2-byte unsigned integer */ 802 typedef INT16_TYPE i16; /* 2-byte signed integer */ 803 typedef UINT8_TYPE u8; /* 1-byte unsigned integer */ 804 typedef INT8_TYPE i8; /* 1-byte signed integer */ 805 806 /* 807 ** SQLITE_MAX_U32 is a u64 constant that is the maximum u64 value 808 ** that can be stored in a u32 without loss of data. The value 809 ** is 0x00000000ffffffff. But because of quirks of some compilers, we 810 ** have to specify the value in the less intuitive manner shown: 811 */ 812 #define SQLITE_MAX_U32 ((((u64)1)<<32)-1) 813 814 /* 815 ** The datatype used to store estimates of the number of rows in a 816 ** table or index. This is an unsigned integer type. For 99.9% of 817 ** the world, a 32-bit integer is sufficient. But a 64-bit integer 818 ** can be used at compile-time if desired. 819 */ 820 #ifdef SQLITE_64BIT_STATS 821 typedef u64 tRowcnt; /* 64-bit only if requested at compile-time */ 822 #else 823 typedef u32 tRowcnt; /* 32-bit is the default */ 824 #endif 825 826 /* 827 ** Estimated quantities used for query planning are stored as 16-bit 828 ** logarithms. For quantity X, the value stored is 10*log2(X). This 829 ** gives a possible range of values of approximately 1.0e986 to 1e-986. 830 ** But the allowed values are "grainy". Not every value is representable. 831 ** For example, quantities 16 and 17 are both represented by a LogEst 832 ** of 40. However, since LogEst quantities are suppose to be estimates, 833 ** not exact values, this imprecision is not a problem. 834 ** 835 ** "LogEst" is short for "Logarithmic Estimate". 836 ** 837 ** Examples: 838 ** 1 -> 0 20 -> 43 10000 -> 132 839 ** 2 -> 10 25 -> 46 25000 -> 146 840 ** 3 -> 16 100 -> 66 1000000 -> 199 841 ** 4 -> 20 1000 -> 99 1048576 -> 200 842 ** 10 -> 33 1024 -> 100 4294967296 -> 320 843 ** 844 ** The LogEst can be negative to indicate fractional values. 845 ** Examples: 846 ** 847 ** 0.5 -> -10 0.1 -> -33 0.0625 -> -40 848 */ 849 typedef INT16_TYPE LogEst; 850 851 /* 852 ** Set the SQLITE_PTRSIZE macro to the number of bytes in a pointer 853 */ 854 #ifndef SQLITE_PTRSIZE 855 # if defined(__SIZEOF_POINTER__) 856 # define SQLITE_PTRSIZE __SIZEOF_POINTER__ 857 # elif defined(i386) || defined(__i386__) || defined(_M_IX86) || \ 858 defined(_M_ARM) || defined(__arm__) || defined(__x86) || \ 859 (defined(__APPLE__) && defined(__POWERPC__)) || \ 860 (defined(__TOS_AIX__) && !defined(__64BIT__)) 861 # define SQLITE_PTRSIZE 4 862 # else 863 # define SQLITE_PTRSIZE 8 864 # endif 865 #endif 866 867 /* The uptr type is an unsigned integer large enough to hold a pointer 868 */ 869 #if defined(HAVE_STDINT_H) 870 typedef uintptr_t uptr; 871 #elif SQLITE_PTRSIZE==4 872 typedef u32 uptr; 873 #else 874 typedef u64 uptr; 875 #endif 876 877 /* 878 ** The SQLITE_WITHIN(P,S,E) macro checks to see if pointer P points to 879 ** something between S (inclusive) and E (exclusive). 880 ** 881 ** In other words, S is a buffer and E is a pointer to the first byte after 882 ** the end of buffer S. This macro returns true if P points to something 883 ** contained within the buffer S. 884 */ 885 #define SQLITE_WITHIN(P,S,E) (((uptr)(P)>=(uptr)(S))&&((uptr)(P)<(uptr)(E))) 886 887 888 /* 889 ** Macros to determine whether the machine is big or little endian, 890 ** and whether or not that determination is run-time or compile-time. 891 ** 892 ** For best performance, an attempt is made to guess at the byte-order 893 ** using C-preprocessor macros. If that is unsuccessful, or if 894 ** -DSQLITE_BYTEORDER=0 is set, then byte-order is determined 895 ** at run-time. 896 */ 897 #ifndef SQLITE_BYTEORDER 898 # if defined(i386) || defined(__i386__) || defined(_M_IX86) || \ 899 defined(__x86_64) || defined(__x86_64__) || defined(_M_X64) || \ 900 defined(_M_AMD64) || defined(_M_ARM) || defined(__x86) || \ 901 defined(__ARMEL__) || defined(__AARCH64EL__) || defined(_M_ARM64) 902 # define SQLITE_BYTEORDER 1234 903 # elif defined(sparc) || defined(__ppc__) || \ 904 defined(__ARMEB__) || defined(__AARCH64EB__) 905 # define SQLITE_BYTEORDER 4321 906 # else 907 # define SQLITE_BYTEORDER 0 908 # endif 909 #endif 910 #if SQLITE_BYTEORDER==4321 911 # define SQLITE_BIGENDIAN 1 912 # define SQLITE_LITTLEENDIAN 0 913 # define SQLITE_UTF16NATIVE SQLITE_UTF16BE 914 #elif SQLITE_BYTEORDER==1234 915 # define SQLITE_BIGENDIAN 0 916 # define SQLITE_LITTLEENDIAN 1 917 # define SQLITE_UTF16NATIVE SQLITE_UTF16LE 918 #else 919 # ifdef SQLITE_AMALGAMATION 920 const int sqlite3one = 1; 921 # else 922 extern const int sqlite3one; 923 # endif 924 # define SQLITE_BIGENDIAN (*(char *)(&sqlite3one)==0) 925 # define SQLITE_LITTLEENDIAN (*(char *)(&sqlite3one)==1) 926 # define SQLITE_UTF16NATIVE (SQLITE_BIGENDIAN?SQLITE_UTF16BE:SQLITE_UTF16LE) 927 #endif 928 929 /* 930 ** Constants for the largest and smallest possible 64-bit signed integers. 931 ** These macros are designed to work correctly on both 32-bit and 64-bit 932 ** compilers. 933 */ 934 #define LARGEST_INT64 (0xffffffff|(((i64)0x7fffffff)<<32)) 935 #define LARGEST_UINT64 (0xffffffff|(((u64)0xffffffff)<<32)) 936 #define SMALLEST_INT64 (((i64)-1) - LARGEST_INT64) 937 938 /* 939 ** Round up a number to the next larger multiple of 8. This is used 940 ** to force 8-byte alignment on 64-bit architectures. 941 */ 942 #define ROUND8(x) (((x)+7)&~7) 943 944 /* 945 ** Round down to the nearest multiple of 8 946 */ 947 #define ROUNDDOWN8(x) ((x)&~7) 948 949 /* 950 ** Assert that the pointer X is aligned to an 8-byte boundary. This 951 ** macro is used only within assert() to verify that the code gets 952 ** all alignment restrictions correct. 953 ** 954 ** Except, if SQLITE_4_BYTE_ALIGNED_MALLOC is defined, then the 955 ** underlying malloc() implementation might return us 4-byte aligned 956 ** pointers. In that case, only verify 4-byte alignment. 957 */ 958 #ifdef SQLITE_4_BYTE_ALIGNED_MALLOC 959 # define EIGHT_BYTE_ALIGNMENT(X) ((((char*)(X) - (char*)0)&3)==0) 960 #else 961 # define EIGHT_BYTE_ALIGNMENT(X) ((((char*)(X) - (char*)0)&7)==0) 962 #endif 963 964 /* 965 ** Disable MMAP on platforms where it is known to not work 966 */ 967 #if defined(__OpenBSD__) || defined(__QNXNTO__) 968 # undef SQLITE_MAX_MMAP_SIZE 969 # define SQLITE_MAX_MMAP_SIZE 0 970 #endif 971 972 /* 973 ** Default maximum size of memory used by memory-mapped I/O in the VFS 974 */ 975 #ifdef __APPLE__ 976 # include <TargetConditionals.h> 977 #endif 978 #ifndef SQLITE_MAX_MMAP_SIZE 979 # if defined(__linux__) \ 980 || defined(_WIN32) \ 981 || (defined(__APPLE__) && defined(__MACH__)) \ 982 || defined(__sun) \ 983 || defined(__FreeBSD__) \ 984 || defined(__DragonFly__) 985 # define SQLITE_MAX_MMAP_SIZE 0x7fff0000 /* 2147418112 */ 986 # else 987 # define SQLITE_MAX_MMAP_SIZE 0 988 # endif 989 #endif 990 991 /* 992 ** The default MMAP_SIZE is zero on all platforms. Or, even if a larger 993 ** default MMAP_SIZE is specified at compile-time, make sure that it does 994 ** not exceed the maximum mmap size. 995 */ 996 #ifndef SQLITE_DEFAULT_MMAP_SIZE 997 # define SQLITE_DEFAULT_MMAP_SIZE 0 998 #endif 999 #if SQLITE_DEFAULT_MMAP_SIZE>SQLITE_MAX_MMAP_SIZE 1000 # undef SQLITE_DEFAULT_MMAP_SIZE 1001 # define SQLITE_DEFAULT_MMAP_SIZE SQLITE_MAX_MMAP_SIZE 1002 #endif 1003 1004 /* 1005 ** SELECTTRACE_ENABLED will be either 1 or 0 depending on whether or not 1006 ** the Select query generator tracing logic is turned on. 1007 */ 1008 #if !defined(SQLITE_AMALGAMATION) 1009 extern u32 sqlite3SelectTrace; 1010 #endif 1011 #if defined(SQLITE_DEBUG) \ 1012 && (defined(SQLITE_TEST) || defined(SQLITE_ENABLE_SELECTTRACE)) 1013 # define SELECTTRACE_ENABLED 1 1014 # define SELECTTRACE(K,P,S,X) \ 1015 if(sqlite3SelectTrace&(K)) \ 1016 sqlite3DebugPrintf("%u/%d/%p: ",(S)->selId,(P)->addrExplain,(S)),\ 1017 sqlite3DebugPrintf X 1018 #else 1019 # define SELECTTRACE(K,P,S,X) 1020 # define SELECTTRACE_ENABLED 0 1021 #endif 1022 1023 /* 1024 ** Macros for "wheretrace" 1025 */ 1026 extern u32 sqlite3WhereTrace; 1027 #if defined(SQLITE_DEBUG) \ 1028 && (defined(SQLITE_TEST) || defined(SQLITE_ENABLE_WHERETRACE)) 1029 # define WHERETRACE(K,X) if(sqlite3WhereTrace&(K)) sqlite3DebugPrintf X 1030 # define WHERETRACE_ENABLED 1 1031 #else 1032 # define WHERETRACE(K,X) 1033 #endif 1034 1035 1036 /* 1037 ** An instance of the following structure is used to store the busy-handler 1038 ** callback for a given sqlite handle. 1039 ** 1040 ** The sqlite.busyHandler member of the sqlite struct contains the busy 1041 ** callback for the database handle. Each pager opened via the sqlite 1042 ** handle is passed a pointer to sqlite.busyHandler. The busy-handler 1043 ** callback is currently invoked only from within pager.c. 1044 */ 1045 typedef struct BusyHandler BusyHandler; 1046 struct BusyHandler { 1047 int (*xBusyHandler)(void *,int); /* The busy callback */ 1048 void *pBusyArg; /* First arg to busy callback */ 1049 int nBusy; /* Incremented with each busy call */ 1050 }; 1051 1052 /* 1053 ** Name of table that holds the database schema. 1054 */ 1055 #define DFLT_SCHEMA_TABLE "sqlite_master" 1056 #define DFLT_TEMP_SCHEMA_TABLE "sqlite_temp_master" 1057 #define ALT_SCHEMA_TABLE "sqlite_schema" 1058 #define ALT_TEMP_SCHEMA_TABLE "sqlite_temp_schema" 1059 1060 1061 /* 1062 ** The root-page of the schema table. 1063 */ 1064 #define SCHEMA_ROOT 1 1065 1066 /* 1067 ** The name of the schema table. The name is different for TEMP. 1068 */ 1069 #define SCHEMA_TABLE(x) \ 1070 ((!OMIT_TEMPDB)&&(x==1)?DFLT_TEMP_SCHEMA_TABLE:DFLT_SCHEMA_TABLE) 1071 1072 /* 1073 ** A convenience macro that returns the number of elements in 1074 ** an array. 1075 */ 1076 #define ArraySize(X) ((int)(sizeof(X)/sizeof(X[0]))) 1077 1078 /* 1079 ** Determine if the argument is a power of two 1080 */ 1081 #define IsPowerOfTwo(X) (((X)&((X)-1))==0) 1082 1083 /* 1084 ** The following value as a destructor means to use sqlite3DbFree(). 1085 ** The sqlite3DbFree() routine requires two parameters instead of the 1086 ** one parameter that destructors normally want. So we have to introduce 1087 ** this magic value that the code knows to handle differently. Any 1088 ** pointer will work here as long as it is distinct from SQLITE_STATIC 1089 ** and SQLITE_TRANSIENT. 1090 */ 1091 #define SQLITE_DYNAMIC ((sqlite3_destructor_type)sqlite3OomFault) 1092 1093 /* 1094 ** When SQLITE_OMIT_WSD is defined, it means that the target platform does 1095 ** not support Writable Static Data (WSD) such as global and static variables. 1096 ** All variables must either be on the stack or dynamically allocated from 1097 ** the heap. When WSD is unsupported, the variable declarations scattered 1098 ** throughout the SQLite code must become constants instead. The SQLITE_WSD 1099 ** macro is used for this purpose. And instead of referencing the variable 1100 ** directly, we use its constant as a key to lookup the run-time allocated 1101 ** buffer that holds real variable. The constant is also the initializer 1102 ** for the run-time allocated buffer. 1103 ** 1104 ** In the usual case where WSD is supported, the SQLITE_WSD and GLOBAL 1105 ** macros become no-ops and have zero performance impact. 1106 */ 1107 #ifdef SQLITE_OMIT_WSD 1108 #define SQLITE_WSD const 1109 #define GLOBAL(t,v) (*(t*)sqlite3_wsd_find((void*)&(v), sizeof(v))) 1110 #define sqlite3GlobalConfig GLOBAL(struct Sqlite3Config, sqlite3Config) 1111 int sqlite3_wsd_init(int N, int J); 1112 void *sqlite3_wsd_find(void *K, int L); 1113 #else 1114 #define SQLITE_WSD 1115 #define GLOBAL(t,v) v 1116 #define sqlite3GlobalConfig sqlite3Config 1117 #endif 1118 1119 /* 1120 ** The following macros are used to suppress compiler warnings and to 1121 ** make it clear to human readers when a function parameter is deliberately 1122 ** left unused within the body of a function. This usually happens when 1123 ** a function is called via a function pointer. For example the 1124 ** implementation of an SQL aggregate step callback may not use the 1125 ** parameter indicating the number of arguments passed to the aggregate, 1126 ** if it knows that this is enforced elsewhere. 1127 ** 1128 ** When a function parameter is not used at all within the body of a function, 1129 ** it is generally named "NotUsed" or "NotUsed2" to make things even clearer. 1130 ** However, these macros may also be used to suppress warnings related to 1131 ** parameters that may or may not be used depending on compilation options. 1132 ** For example those parameters only used in assert() statements. In these 1133 ** cases the parameters are named as per the usual conventions. 1134 */ 1135 #define UNUSED_PARAMETER(x) (void)(x) 1136 #define UNUSED_PARAMETER2(x,y) UNUSED_PARAMETER(x),UNUSED_PARAMETER(y) 1137 1138 /* 1139 ** Forward references to structures 1140 */ 1141 typedef struct AggInfo AggInfo; 1142 typedef struct AuthContext AuthContext; 1143 typedef struct AutoincInfo AutoincInfo; 1144 typedef struct Bitvec Bitvec; 1145 typedef struct CollSeq CollSeq; 1146 typedef struct Column Column; 1147 typedef struct Cte Cte; 1148 typedef struct CteUse CteUse; 1149 typedef struct Db Db; 1150 typedef struct DbFixer DbFixer; 1151 typedef struct Schema Schema; 1152 typedef struct Expr Expr; 1153 typedef struct ExprList ExprList; 1154 typedef struct FKey FKey; 1155 typedef struct FuncDestructor FuncDestructor; 1156 typedef struct FuncDef FuncDef; 1157 typedef struct FuncDefHash FuncDefHash; 1158 typedef struct IdList IdList; 1159 typedef struct Index Index; 1160 typedef struct IndexSample IndexSample; 1161 typedef struct KeyClass KeyClass; 1162 typedef struct KeyInfo KeyInfo; 1163 typedef struct Lookaside Lookaside; 1164 typedef struct LookasideSlot LookasideSlot; 1165 typedef struct Module Module; 1166 typedef struct NameContext NameContext; 1167 typedef struct Parse Parse; 1168 typedef struct ParseCleanup ParseCleanup; 1169 typedef struct PreUpdate PreUpdate; 1170 typedef struct PrintfArguments PrintfArguments; 1171 typedef struct RenameToken RenameToken; 1172 typedef struct Returning Returning; 1173 typedef struct RowSet RowSet; 1174 typedef struct Savepoint Savepoint; 1175 typedef struct Select Select; 1176 typedef struct SQLiteThread SQLiteThread; 1177 typedef struct SelectDest SelectDest; 1178 typedef struct SrcItem SrcItem; 1179 typedef struct SrcList SrcList; 1180 typedef struct sqlite3_str StrAccum; /* Internal alias for sqlite3_str */ 1181 typedef struct Table Table; 1182 typedef struct TableLock TableLock; 1183 typedef struct Token Token; 1184 typedef struct TreeView TreeView; 1185 typedef struct Trigger Trigger; 1186 typedef struct TriggerPrg TriggerPrg; 1187 typedef struct TriggerStep TriggerStep; 1188 typedef struct UnpackedRecord UnpackedRecord; 1189 typedef struct Upsert Upsert; 1190 typedef struct VTable VTable; 1191 typedef struct VtabCtx VtabCtx; 1192 typedef struct Walker Walker; 1193 typedef struct WhereInfo WhereInfo; 1194 typedef struct Window Window; 1195 typedef struct With With; 1196 1197 1198 /* 1199 ** The bitmask datatype defined below is used for various optimizations. 1200 ** 1201 ** Changing this from a 64-bit to a 32-bit type limits the number of 1202 ** tables in a join to 32 instead of 64. But it also reduces the size 1203 ** of the library by 738 bytes on ix86. 1204 */ 1205 #ifdef SQLITE_BITMASK_TYPE 1206 typedef SQLITE_BITMASK_TYPE Bitmask; 1207 #else 1208 typedef u64 Bitmask; 1209 #endif 1210 1211 /* 1212 ** The number of bits in a Bitmask. "BMS" means "BitMask Size". 1213 */ 1214 #define BMS ((int)(sizeof(Bitmask)*8)) 1215 1216 /* 1217 ** A bit in a Bitmask 1218 */ 1219 #define MASKBIT(n) (((Bitmask)1)<<(n)) 1220 #define MASKBIT64(n) (((u64)1)<<(n)) 1221 #define MASKBIT32(n) (((unsigned int)1)<<(n)) 1222 #define ALLBITS ((Bitmask)-1) 1223 1224 /* A VList object records a mapping between parameters/variables/wildcards 1225 ** in the SQL statement (such as $abc, @pqr, or :xyz) and the integer 1226 ** variable number associated with that parameter. See the format description 1227 ** on the sqlite3VListAdd() routine for more information. A VList is really 1228 ** just an array of integers. 1229 */ 1230 typedef int VList; 1231 1232 /* 1233 ** Defer sourcing vdbe.h and btree.h until after the "u8" and 1234 ** "BusyHandler" typedefs. vdbe.h also requires a few of the opaque 1235 ** pointer types (i.e. FuncDef) defined above. 1236 */ 1237 #include "pager.h" 1238 #include "btree.h" 1239 #include "vdbe.h" 1240 #include "pcache.h" 1241 #include "os.h" 1242 #include "mutex.h" 1243 1244 /* The SQLITE_EXTRA_DURABLE compile-time option used to set the default 1245 ** synchronous setting to EXTRA. It is no longer supported. 1246 */ 1247 #ifdef SQLITE_EXTRA_DURABLE 1248 # warning Use SQLITE_DEFAULT_SYNCHRONOUS=3 instead of SQLITE_EXTRA_DURABLE 1249 # define SQLITE_DEFAULT_SYNCHRONOUS 3 1250 #endif 1251 1252 /* 1253 ** Default synchronous levels. 1254 ** 1255 ** Note that (for historcal reasons) the PAGER_SYNCHRONOUS_* macros differ 1256 ** from the SQLITE_DEFAULT_SYNCHRONOUS value by 1. 1257 ** 1258 ** PAGER_SYNCHRONOUS DEFAULT_SYNCHRONOUS 1259 ** OFF 1 0 1260 ** NORMAL 2 1 1261 ** FULL 3 2 1262 ** EXTRA 4 3 1263 ** 1264 ** The "PRAGMA synchronous" statement also uses the zero-based numbers. 1265 ** In other words, the zero-based numbers are used for all external interfaces 1266 ** and the one-based values are used internally. 1267 */ 1268 #ifndef SQLITE_DEFAULT_SYNCHRONOUS 1269 # define SQLITE_DEFAULT_SYNCHRONOUS 2 1270 #endif 1271 #ifndef SQLITE_DEFAULT_WAL_SYNCHRONOUS 1272 # define SQLITE_DEFAULT_WAL_SYNCHRONOUS SQLITE_DEFAULT_SYNCHRONOUS 1273 #endif 1274 1275 /* 1276 ** Each database file to be accessed by the system is an instance 1277 ** of the following structure. There are normally two of these structures 1278 ** in the sqlite.aDb[] array. aDb[0] is the main database file and 1279 ** aDb[1] is the database file used to hold temporary tables. Additional 1280 ** databases may be attached. 1281 */ 1282 struct Db { 1283 char *zDbSName; /* Name of this database. (schema name, not filename) */ 1284 Btree *pBt; /* The B*Tree structure for this database file */ 1285 u8 safety_level; /* How aggressive at syncing data to disk */ 1286 u8 bSyncSet; /* True if "PRAGMA synchronous=N" has been run */ 1287 Schema *pSchema; /* Pointer to database schema (possibly shared) */ 1288 }; 1289 1290 /* 1291 ** An instance of the following structure stores a database schema. 1292 ** 1293 ** Most Schema objects are associated with a Btree. The exception is 1294 ** the Schema for the TEMP databaes (sqlite3.aDb[1]) which is free-standing. 1295 ** In shared cache mode, a single Schema object can be shared by multiple 1296 ** Btrees that refer to the same underlying BtShared object. 1297 ** 1298 ** Schema objects are automatically deallocated when the last Btree that 1299 ** references them is destroyed. The TEMP Schema is manually freed by 1300 ** sqlite3_close(). 1301 * 1302 ** A thread must be holding a mutex on the corresponding Btree in order 1303 ** to access Schema content. This implies that the thread must also be 1304 ** holding a mutex on the sqlite3 connection pointer that owns the Btree. 1305 ** For a TEMP Schema, only the connection mutex is required. 1306 */ 1307 struct Schema { 1308 int schema_cookie; /* Database schema version number for this file */ 1309 int iGeneration; /* Generation counter. Incremented with each change */ 1310 Hash tblHash; /* All tables indexed by name */ 1311 Hash idxHash; /* All (named) indices indexed by name */ 1312 Hash trigHash; /* All triggers indexed by name */ 1313 Hash fkeyHash; /* All foreign keys by referenced table name */ 1314 Table *pSeqTab; /* The sqlite_sequence table used by AUTOINCREMENT */ 1315 u8 file_format; /* Schema format version for this file */ 1316 u8 enc; /* Text encoding used by this database */ 1317 u16 schemaFlags; /* Flags associated with this schema */ 1318 int cache_size; /* Number of pages to use in the cache */ 1319 }; 1320 1321 /* 1322 ** These macros can be used to test, set, or clear bits in the 1323 ** Db.pSchema->flags field. 1324 */ 1325 #define DbHasProperty(D,I,P) (((D)->aDb[I].pSchema->schemaFlags&(P))==(P)) 1326 #define DbHasAnyProperty(D,I,P) (((D)->aDb[I].pSchema->schemaFlags&(P))!=0) 1327 #define DbSetProperty(D,I,P) (D)->aDb[I].pSchema->schemaFlags|=(P) 1328 #define DbClearProperty(D,I,P) (D)->aDb[I].pSchema->schemaFlags&=~(P) 1329 1330 /* 1331 ** Allowed values for the DB.pSchema->flags field. 1332 ** 1333 ** The DB_SchemaLoaded flag is set after the database schema has been 1334 ** read into internal hash tables. 1335 ** 1336 ** DB_UnresetViews means that one or more views have column names that 1337 ** have been filled out. If the schema changes, these column names might 1338 ** changes and so the view will need to be reset. 1339 */ 1340 #define DB_SchemaLoaded 0x0001 /* The schema has been loaded */ 1341 #define DB_UnresetViews 0x0002 /* Some views have defined column names */ 1342 #define DB_ResetWanted 0x0008 /* Reset the schema when nSchemaLock==0 */ 1343 1344 /* 1345 ** The number of different kinds of things that can be limited 1346 ** using the sqlite3_limit() interface. 1347 */ 1348 #define SQLITE_N_LIMIT (SQLITE_LIMIT_WORKER_THREADS+1) 1349 1350 /* 1351 ** Lookaside malloc is a set of fixed-size buffers that can be used 1352 ** to satisfy small transient memory allocation requests for objects 1353 ** associated with a particular database connection. The use of 1354 ** lookaside malloc provides a significant performance enhancement 1355 ** (approx 10%) by avoiding numerous malloc/free requests while parsing 1356 ** SQL statements. 1357 ** 1358 ** The Lookaside structure holds configuration information about the 1359 ** lookaside malloc subsystem. Each available memory allocation in 1360 ** the lookaside subsystem is stored on a linked list of LookasideSlot 1361 ** objects. 1362 ** 1363 ** Lookaside allocations are only allowed for objects that are associated 1364 ** with a particular database connection. Hence, schema information cannot 1365 ** be stored in lookaside because in shared cache mode the schema information 1366 ** is shared by multiple database connections. Therefore, while parsing 1367 ** schema information, the Lookaside.bEnabled flag is cleared so that 1368 ** lookaside allocations are not used to construct the schema objects. 1369 ** 1370 ** New lookaside allocations are only allowed if bDisable==0. When 1371 ** bDisable is greater than zero, sz is set to zero which effectively 1372 ** disables lookaside without adding a new test for the bDisable flag 1373 ** in a performance-critical path. sz should be set by to szTrue whenever 1374 ** bDisable changes back to zero. 1375 ** 1376 ** Lookaside buffers are initially held on the pInit list. As they are 1377 ** used and freed, they are added back to the pFree list. New allocations 1378 ** come off of pFree first, then pInit as a fallback. This dual-list 1379 ** allows use to compute a high-water mark - the maximum number of allocations 1380 ** outstanding at any point in the past - by subtracting the number of 1381 ** allocations on the pInit list from the total number of allocations. 1382 ** 1383 ** Enhancement on 2019-12-12: Two-size-lookaside 1384 ** The default lookaside configuration is 100 slots of 1200 bytes each. 1385 ** The larger slot sizes are important for performance, but they waste 1386 ** a lot of space, as most lookaside allocations are less than 128 bytes. 1387 ** The two-size-lookaside enhancement breaks up the lookaside allocation 1388 ** into two pools: One of 128-byte slots and the other of the default size 1389 ** (1200-byte) slots. Allocations are filled from the small-pool first, 1390 ** failing over to the full-size pool if that does not work. Thus more 1391 ** lookaside slots are available while also using less memory. 1392 ** This enhancement can be omitted by compiling with 1393 ** SQLITE_OMIT_TWOSIZE_LOOKASIDE. 1394 */ 1395 struct Lookaside { 1396 u32 bDisable; /* Only operate the lookaside when zero */ 1397 u16 sz; /* Size of each buffer in bytes */ 1398 u16 szTrue; /* True value of sz, even if disabled */ 1399 u8 bMalloced; /* True if pStart obtained from sqlite3_malloc() */ 1400 u32 nSlot; /* Number of lookaside slots allocated */ 1401 u32 anStat[3]; /* 0: hits. 1: size misses. 2: full misses */ 1402 LookasideSlot *pInit; /* List of buffers not previously used */ 1403 LookasideSlot *pFree; /* List of available buffers */ 1404 #ifndef SQLITE_OMIT_TWOSIZE_LOOKASIDE 1405 LookasideSlot *pSmallInit; /* List of small buffers not prediously used */ 1406 LookasideSlot *pSmallFree; /* List of available small buffers */ 1407 void *pMiddle; /* First byte past end of full-size buffers and 1408 ** the first byte of LOOKASIDE_SMALL buffers */ 1409 #endif /* SQLITE_OMIT_TWOSIZE_LOOKASIDE */ 1410 void *pStart; /* First byte of available memory space */ 1411 void *pEnd; /* First byte past end of available space */ 1412 }; 1413 struct LookasideSlot { 1414 LookasideSlot *pNext; /* Next buffer in the list of free buffers */ 1415 }; 1416 1417 #define DisableLookaside db->lookaside.bDisable++;db->lookaside.sz=0 1418 #define EnableLookaside db->lookaside.bDisable--;\ 1419 db->lookaside.sz=db->lookaside.bDisable?0:db->lookaside.szTrue 1420 1421 /* Size of the smaller allocations in two-size lookside */ 1422 #ifdef SQLITE_OMIT_TWOSIZE_LOOKASIDE 1423 # define LOOKASIDE_SMALL 0 1424 #else 1425 # define LOOKASIDE_SMALL 128 1426 #endif 1427 1428 /* 1429 ** A hash table for built-in function definitions. (Application-defined 1430 ** functions use a regular table table from hash.h.) 1431 ** 1432 ** Hash each FuncDef structure into one of the FuncDefHash.a[] slots. 1433 ** Collisions are on the FuncDef.u.pHash chain. Use the SQLITE_FUNC_HASH() 1434 ** macro to compute a hash on the function name. 1435 */ 1436 #define SQLITE_FUNC_HASH_SZ 23 1437 struct FuncDefHash { 1438 FuncDef *a[SQLITE_FUNC_HASH_SZ]; /* Hash table for functions */ 1439 }; 1440 #define SQLITE_FUNC_HASH(C,L) (((C)+(L))%SQLITE_FUNC_HASH_SZ) 1441 1442 #ifdef SQLITE_USER_AUTHENTICATION 1443 /* 1444 ** Information held in the "sqlite3" database connection object and used 1445 ** to manage user authentication. 1446 */ 1447 typedef struct sqlite3_userauth sqlite3_userauth; 1448 struct sqlite3_userauth { 1449 u8 authLevel; /* Current authentication level */ 1450 int nAuthPW; /* Size of the zAuthPW in bytes */ 1451 char *zAuthPW; /* Password used to authenticate */ 1452 char *zAuthUser; /* User name used to authenticate */ 1453 }; 1454 1455 /* Allowed values for sqlite3_userauth.authLevel */ 1456 #define UAUTH_Unknown 0 /* Authentication not yet checked */ 1457 #define UAUTH_Fail 1 /* User authentication failed */ 1458 #define UAUTH_User 2 /* Authenticated as a normal user */ 1459 #define UAUTH_Admin 3 /* Authenticated as an administrator */ 1460 1461 /* Functions used only by user authorization logic */ 1462 int sqlite3UserAuthTable(const char*); 1463 int sqlite3UserAuthCheckLogin(sqlite3*,const char*,u8*); 1464 void sqlite3UserAuthInit(sqlite3*); 1465 void sqlite3CryptFunc(sqlite3_context*,int,sqlite3_value**); 1466 1467 #endif /* SQLITE_USER_AUTHENTICATION */ 1468 1469 /* 1470 ** typedef for the authorization callback function. 1471 */ 1472 #ifdef SQLITE_USER_AUTHENTICATION 1473 typedef int (*sqlite3_xauth)(void*,int,const char*,const char*,const char*, 1474 const char*, const char*); 1475 #else 1476 typedef int (*sqlite3_xauth)(void*,int,const char*,const char*,const char*, 1477 const char*); 1478 #endif 1479 1480 #ifndef SQLITE_OMIT_DEPRECATED 1481 /* This is an extra SQLITE_TRACE macro that indicates "legacy" tracing 1482 ** in the style of sqlite3_trace() 1483 */ 1484 #define SQLITE_TRACE_LEGACY 0x40 /* Use the legacy xTrace */ 1485 #define SQLITE_TRACE_XPROFILE 0x80 /* Use the legacy xProfile */ 1486 #else 1487 #define SQLITE_TRACE_LEGACY 0 1488 #define SQLITE_TRACE_XPROFILE 0 1489 #endif /* SQLITE_OMIT_DEPRECATED */ 1490 #define SQLITE_TRACE_NONLEGACY_MASK 0x0f /* Normal flags */ 1491 1492 /* 1493 ** Maximum number of sqlite3.aDb[] entries. This is the number of attached 1494 ** databases plus 2 for "main" and "temp". 1495 */ 1496 #define SQLITE_MAX_DB (SQLITE_MAX_ATTACHED+2) 1497 1498 /* 1499 ** Each database connection is an instance of the following structure. 1500 */ 1501 struct sqlite3 { 1502 sqlite3_vfs *pVfs; /* OS Interface */ 1503 struct Vdbe *pVdbe; /* List of active virtual machines */ 1504 CollSeq *pDfltColl; /* BINARY collseq for the database encoding */ 1505 sqlite3_mutex *mutex; /* Connection mutex */ 1506 Db *aDb; /* All backends */ 1507 int nDb; /* Number of backends currently in use */ 1508 u32 mDbFlags; /* flags recording internal state */ 1509 u64 flags; /* flags settable by pragmas. See below */ 1510 i64 lastRowid; /* ROWID of most recent insert (see above) */ 1511 i64 szMmap; /* Default mmap_size setting */ 1512 u32 nSchemaLock; /* Do not reset the schema when non-zero */ 1513 unsigned int openFlags; /* Flags passed to sqlite3_vfs.xOpen() */ 1514 int errCode; /* Most recent error code (SQLITE_*) */ 1515 int errMask; /* & result codes with this before returning */ 1516 int iSysErrno; /* Errno value from last system error */ 1517 u32 dbOptFlags; /* Flags to enable/disable optimizations */ 1518 u8 enc; /* Text encoding */ 1519 u8 autoCommit; /* The auto-commit flag. */ 1520 u8 temp_store; /* 1: file 2: memory 0: default */ 1521 u8 mallocFailed; /* True if we have seen a malloc failure */ 1522 u8 bBenignMalloc; /* Do not require OOMs if true */ 1523 u8 dfltLockMode; /* Default locking-mode for attached dbs */ 1524 signed char nextAutovac; /* Autovac setting after VACUUM if >=0 */ 1525 u8 suppressErr; /* Do not issue error messages if true */ 1526 u8 vtabOnConflict; /* Value to return for s3_vtab_on_conflict() */ 1527 u8 isTransactionSavepoint; /* True if the outermost savepoint is a TS */ 1528 u8 mTrace; /* zero or more SQLITE_TRACE flags */ 1529 u8 noSharedCache; /* True if no shared-cache backends */ 1530 u8 nSqlExec; /* Number of pending OP_SqlExec opcodes */ 1531 u8 eOpenState; /* Current condition of the connection */ 1532 int nextPagesize; /* Pagesize after VACUUM if >0 */ 1533 i64 nChange; /* Value returned by sqlite3_changes() */ 1534 i64 nTotalChange; /* Value returned by sqlite3_total_changes() */ 1535 int aLimit[SQLITE_N_LIMIT]; /* Limits */ 1536 int nMaxSorterMmap; /* Maximum size of regions mapped by sorter */ 1537 struct sqlite3InitInfo { /* Information used during initialization */ 1538 Pgno newTnum; /* Rootpage of table being initialized */ 1539 u8 iDb; /* Which db file is being initialized */ 1540 u8 busy; /* TRUE if currently initializing */ 1541 unsigned orphanTrigger : 1; /* Last statement is orphaned TEMP trigger */ 1542 unsigned imposterTable : 1; /* Building an imposter table */ 1543 unsigned reopenMemdb : 1; /* ATTACH is really a reopen using MemDB */ 1544 const char **azInit; /* "type", "name", and "tbl_name" columns */ 1545 } init; 1546 int nVdbeActive; /* Number of VDBEs currently running */ 1547 int nVdbeRead; /* Number of active VDBEs that read or write */ 1548 int nVdbeWrite; /* Number of active VDBEs that read and write */ 1549 int nVdbeExec; /* Number of nested calls to VdbeExec() */ 1550 int nVDestroy; /* Number of active OP_VDestroy operations */ 1551 int nExtension; /* Number of loaded extensions */ 1552 void **aExtension; /* Array of shared library handles */ 1553 union { 1554 void (*xLegacy)(void*,const char*); /* mTrace==SQLITE_TRACE_LEGACY */ 1555 int (*xV2)(u32,void*,void*,void*); /* All other mTrace values */ 1556 } trace; 1557 void *pTraceArg; /* Argument to the trace function */ 1558 #ifndef SQLITE_OMIT_DEPRECATED 1559 void (*xProfile)(void*,const char*,u64); /* Profiling function */ 1560 void *pProfileArg; /* Argument to profile function */ 1561 #endif 1562 void *pCommitArg; /* Argument to xCommitCallback() */ 1563 int (*xCommitCallback)(void*); /* Invoked at every commit. */ 1564 void *pRollbackArg; /* Argument to xRollbackCallback() */ 1565 void (*xRollbackCallback)(void*); /* Invoked at every commit. */ 1566 void *pUpdateArg; 1567 void (*xUpdateCallback)(void*,int, const char*,const char*,sqlite_int64); 1568 Parse *pParse; /* Current parse */ 1569 #ifdef SQLITE_ENABLE_PREUPDATE_HOOK 1570 void *pPreUpdateArg; /* First argument to xPreUpdateCallback */ 1571 void (*xPreUpdateCallback)( /* Registered using sqlite3_preupdate_hook() */ 1572 void*,sqlite3*,int,char const*,char const*,sqlite3_int64,sqlite3_int64 1573 ); 1574 PreUpdate *pPreUpdate; /* Context for active pre-update callback */ 1575 #endif /* SQLITE_ENABLE_PREUPDATE_HOOK */ 1576 #ifndef SQLITE_OMIT_WAL 1577 int (*xWalCallback)(void *, sqlite3 *, const char *, int); 1578 void *pWalArg; 1579 #endif 1580 void(*xCollNeeded)(void*,sqlite3*,int eTextRep,const char*); 1581 void(*xCollNeeded16)(void*,sqlite3*,int eTextRep,const void*); 1582 void *pCollNeededArg; 1583 sqlite3_value *pErr; /* Most recent error message */ 1584 union { 1585 volatile int isInterrupted; /* True if sqlite3_interrupt has been called */ 1586 double notUsed1; /* Spacer */ 1587 } u1; 1588 Lookaside lookaside; /* Lookaside malloc configuration */ 1589 #ifndef SQLITE_OMIT_AUTHORIZATION 1590 sqlite3_xauth xAuth; /* Access authorization function */ 1591 void *pAuthArg; /* 1st argument to the access auth function */ 1592 #endif 1593 #ifndef SQLITE_OMIT_PROGRESS_CALLBACK 1594 int (*xProgress)(void *); /* The progress callback */ 1595 void *pProgressArg; /* Argument to the progress callback */ 1596 unsigned nProgressOps; /* Number of opcodes for progress callback */ 1597 #endif 1598 #ifndef SQLITE_OMIT_VIRTUALTABLE 1599 int nVTrans; /* Allocated size of aVTrans */ 1600 Hash aModule; /* populated by sqlite3_create_module() */ 1601 VtabCtx *pVtabCtx; /* Context for active vtab connect/create */ 1602 VTable **aVTrans; /* Virtual tables with open transactions */ 1603 VTable *pDisconnect; /* Disconnect these in next sqlite3_prepare() */ 1604 #endif 1605 Hash aFunc; /* Hash table of connection functions */ 1606 Hash aCollSeq; /* All collating sequences */ 1607 BusyHandler busyHandler; /* Busy callback */ 1608 Db aDbStatic[2]; /* Static space for the 2 default backends */ 1609 Savepoint *pSavepoint; /* List of active savepoints */ 1610 int nAnalysisLimit; /* Number of index rows to ANALYZE */ 1611 int busyTimeout; /* Busy handler timeout, in msec */ 1612 int nSavepoint; /* Number of non-transaction savepoints */ 1613 int nStatement; /* Number of nested statement-transactions */ 1614 i64 nDeferredCons; /* Net deferred constraints this transaction. */ 1615 i64 nDeferredImmCons; /* Net deferred immediate constraints */ 1616 int *pnBytesFreed; /* If not NULL, increment this in DbFree() */ 1617 #ifdef SQLITE_ENABLE_UNLOCK_NOTIFY 1618 /* The following variables are all protected by the STATIC_MAIN 1619 ** mutex, not by sqlite3.mutex. They are used by code in notify.c. 1620 ** 1621 ** When X.pUnlockConnection==Y, that means that X is waiting for Y to 1622 ** unlock so that it can proceed. 1623 ** 1624 ** When X.pBlockingConnection==Y, that means that something that X tried 1625 ** tried to do recently failed with an SQLITE_LOCKED error due to locks 1626 ** held by Y. 1627 */ 1628 sqlite3 *pBlockingConnection; /* Connection that caused SQLITE_LOCKED */ 1629 sqlite3 *pUnlockConnection; /* Connection to watch for unlock */ 1630 void *pUnlockArg; /* Argument to xUnlockNotify */ 1631 void (*xUnlockNotify)(void **, int); /* Unlock notify callback */ 1632 sqlite3 *pNextBlocked; /* Next in list of all blocked connections */ 1633 #endif 1634 #ifdef SQLITE_USER_AUTHENTICATION 1635 sqlite3_userauth auth; /* User authentication information */ 1636 #endif 1637 }; 1638 1639 /* 1640 ** A macro to discover the encoding of a database. 1641 */ 1642 #define SCHEMA_ENC(db) ((db)->aDb[0].pSchema->enc) 1643 #define ENC(db) ((db)->enc) 1644 1645 /* 1646 ** A u64 constant where the lower 32 bits are all zeros. Only the 1647 ** upper 32 bits are included in the argument. Necessary because some 1648 ** C-compilers still do not accept LL integer literals. 1649 */ 1650 #define HI(X) ((u64)(X)<<32) 1651 1652 /* 1653 ** Possible values for the sqlite3.flags. 1654 ** 1655 ** Value constraints (enforced via assert()): 1656 ** SQLITE_FullFSync == PAGER_FULLFSYNC 1657 ** SQLITE_CkptFullFSync == PAGER_CKPT_FULLFSYNC 1658 ** SQLITE_CacheSpill == PAGER_CACHE_SPILL 1659 */ 1660 #define SQLITE_WriteSchema 0x00000001 /* OK to update SQLITE_SCHEMA */ 1661 #define SQLITE_LegacyFileFmt 0x00000002 /* Create new databases in format 1 */ 1662 #define SQLITE_FullColNames 0x00000004 /* Show full column names on SELECT */ 1663 #define SQLITE_FullFSync 0x00000008 /* Use full fsync on the backend */ 1664 #define SQLITE_CkptFullFSync 0x00000010 /* Use full fsync for checkpoint */ 1665 #define SQLITE_CacheSpill 0x00000020 /* OK to spill pager cache */ 1666 #define SQLITE_ShortColNames 0x00000040 /* Show short columns names */ 1667 #define SQLITE_TrustedSchema 0x00000080 /* Allow unsafe functions and 1668 ** vtabs in the schema definition */ 1669 #define SQLITE_NullCallback 0x00000100 /* Invoke the callback once if the */ 1670 /* result set is empty */ 1671 #define SQLITE_IgnoreChecks 0x00000200 /* Do not enforce check constraints */ 1672 #define SQLITE_ReadUncommit 0x00000400 /* READ UNCOMMITTED in shared-cache */ 1673 #define SQLITE_NoCkptOnClose 0x00000800 /* No checkpoint on close()/DETACH */ 1674 #define SQLITE_ReverseOrder 0x00001000 /* Reverse unordered SELECTs */ 1675 #define SQLITE_RecTriggers 0x00002000 /* Enable recursive triggers */ 1676 #define SQLITE_ForeignKeys 0x00004000 /* Enforce foreign key constraints */ 1677 #define SQLITE_AutoIndex 0x00008000 /* Enable automatic indexes */ 1678 #define SQLITE_LoadExtension 0x00010000 /* Enable load_extension */ 1679 #define SQLITE_LoadExtFunc 0x00020000 /* Enable load_extension() SQL func */ 1680 #define SQLITE_EnableTrigger 0x00040000 /* True to enable triggers */ 1681 #define SQLITE_DeferFKs 0x00080000 /* Defer all FK constraints */ 1682 #define SQLITE_QueryOnly 0x00100000 /* Disable database changes */ 1683 #define SQLITE_CellSizeCk 0x00200000 /* Check btree cell sizes on load */ 1684 #define SQLITE_Fts3Tokenizer 0x00400000 /* Enable fts3_tokenizer(2) */ 1685 #define SQLITE_EnableQPSG 0x00800000 /* Query Planner Stability Guarantee*/ 1686 #define SQLITE_TriggerEQP 0x01000000 /* Show trigger EXPLAIN QUERY PLAN */ 1687 #define SQLITE_ResetDatabase 0x02000000 /* Reset the database */ 1688 #define SQLITE_LegacyAlter 0x04000000 /* Legacy ALTER TABLE behaviour */ 1689 #define SQLITE_NoSchemaError 0x08000000 /* Do not report schema parse errors*/ 1690 #define SQLITE_Defensive 0x10000000 /* Input SQL is likely hostile */ 1691 #define SQLITE_DqsDDL 0x20000000 /* dbl-quoted strings allowed in DDL*/ 1692 #define SQLITE_DqsDML 0x40000000 /* dbl-quoted strings allowed in DML*/ 1693 #define SQLITE_EnableView 0x80000000 /* Enable the use of views */ 1694 #define SQLITE_CountRows HI(0x00001) /* Count rows changed by INSERT, */ 1695 /* DELETE, or UPDATE and return */ 1696 /* the count using a callback. */ 1697 1698 /* Flags used only if debugging */ 1699 #ifdef SQLITE_DEBUG 1700 #define SQLITE_SqlTrace HI(0x0100000) /* Debug print SQL as it executes */ 1701 #define SQLITE_VdbeListing HI(0x0200000) /* Debug listings of VDBE progs */ 1702 #define SQLITE_VdbeTrace HI(0x0400000) /* True to trace VDBE execution */ 1703 #define SQLITE_VdbeAddopTrace HI(0x0800000) /* Trace sqlite3VdbeAddOp() calls */ 1704 #define SQLITE_VdbeEQP HI(0x1000000) /* Debug EXPLAIN QUERY PLAN */ 1705 #define SQLITE_ParserTrace HI(0x2000000) /* PRAGMA parser_trace=ON */ 1706 #endif 1707 1708 /* 1709 ** Allowed values for sqlite3.mDbFlags 1710 */ 1711 #define DBFLAG_SchemaChange 0x0001 /* Uncommitted Hash table changes */ 1712 #define DBFLAG_PreferBuiltin 0x0002 /* Preference to built-in funcs */ 1713 #define DBFLAG_Vacuum 0x0004 /* Currently in a VACUUM */ 1714 #define DBFLAG_VacuumInto 0x0008 /* Currently running VACUUM INTO */ 1715 #define DBFLAG_SchemaKnownOk 0x0010 /* Schema is known to be valid */ 1716 #define DBFLAG_InternalFunc 0x0020 /* Allow use of internal functions */ 1717 #define DBFLAG_EncodingFixed 0x0040 /* No longer possible to change enc. */ 1718 1719 /* 1720 ** Bits of the sqlite3.dbOptFlags field that are used by the 1721 ** sqlite3_test_control(SQLITE_TESTCTRL_OPTIMIZATIONS,...) interface to 1722 ** selectively disable various optimizations. 1723 */ 1724 #define SQLITE_QueryFlattener 0x00000001 /* Query flattening */ 1725 #define SQLITE_WindowFunc 0x00000002 /* Use xInverse for window functions */ 1726 #define SQLITE_GroupByOrder 0x00000004 /* GROUPBY cover of ORDERBY */ 1727 #define SQLITE_FactorOutConst 0x00000008 /* Constant factoring */ 1728 #define SQLITE_DistinctOpt 0x00000010 /* DISTINCT using indexes */ 1729 #define SQLITE_CoverIdxScan 0x00000020 /* Covering index scans */ 1730 #define SQLITE_OrderByIdxJoin 0x00000040 /* ORDER BY of joins via index */ 1731 #define SQLITE_Transitive 0x00000080 /* Transitive constraints */ 1732 #define SQLITE_OmitNoopJoin 0x00000100 /* Omit unused tables in joins */ 1733 #define SQLITE_CountOfView 0x00000200 /* The count-of-view optimization */ 1734 #define SQLITE_CursorHints 0x00000400 /* Add OP_CursorHint opcodes */ 1735 #define SQLITE_Stat4 0x00000800 /* Use STAT4 data */ 1736 /* TH3 expects this value ^^^^^^^^^^ to be 0x0000800. Don't change it */ 1737 #define SQLITE_PushDown 0x00001000 /* The push-down optimization */ 1738 #define SQLITE_SimplifyJoin 0x00002000 /* Convert LEFT JOIN to JOIN */ 1739 #define SQLITE_SkipScan 0x00004000 /* Skip-scans */ 1740 #define SQLITE_PropagateConst 0x00008000 /* The constant propagation opt */ 1741 #define SQLITE_MinMaxOpt 0x00010000 /* The min/max optimization */ 1742 #define SQLITE_SeekScan 0x00020000 /* The OP_SeekScan optimization */ 1743 #define SQLITE_OmitOrderBy 0x00040000 /* Omit pointless ORDER BY */ 1744 /* TH3 expects this value ^^^^^^^^^^ to be 0x40000. Coordinate any change */ 1745 #define SQLITE_AllOpts 0xffffffff /* All optimizations */ 1746 1747 /* 1748 ** Macros for testing whether or not optimizations are enabled or disabled. 1749 */ 1750 #define OptimizationDisabled(db, mask) (((db)->dbOptFlags&(mask))!=0) 1751 #define OptimizationEnabled(db, mask) (((db)->dbOptFlags&(mask))==0) 1752 1753 /* 1754 ** Return true if it OK to factor constant expressions into the initialization 1755 ** code. The argument is a Parse object for the code generator. 1756 */ 1757 #define ConstFactorOk(P) ((P)->okConstFactor) 1758 1759 /* Possible values for the sqlite3.eOpenState field. 1760 ** The numbers are randomly selected such that a minimum of three bits must 1761 ** change to convert any number to another or to zero 1762 */ 1763 #define SQLITE_STATE_OPEN 0x76 /* Database is open */ 1764 #define SQLITE_STATE_CLOSED 0xce /* Database is closed */ 1765 #define SQLITE_STATE_SICK 0xba /* Error and awaiting close */ 1766 #define SQLITE_STATE_BUSY 0x6d /* Database currently in use */ 1767 #define SQLITE_STATE_ERROR 0xd5 /* An SQLITE_MISUSE error occurred */ 1768 #define SQLITE_STATE_ZOMBIE 0xa7 /* Close with last statement close */ 1769 1770 /* 1771 ** Each SQL function is defined by an instance of the following 1772 ** structure. For global built-in functions (ex: substr(), max(), count()) 1773 ** a pointer to this structure is held in the sqlite3BuiltinFunctions object. 1774 ** For per-connection application-defined functions, a pointer to this 1775 ** structure is held in the db->aHash hash table. 1776 ** 1777 ** The u.pHash field is used by the global built-ins. The u.pDestructor 1778 ** field is used by per-connection app-def functions. 1779 */ 1780 struct FuncDef { 1781 i8 nArg; /* Number of arguments. -1 means unlimited */ 1782 u32 funcFlags; /* Some combination of SQLITE_FUNC_* */ 1783 void *pUserData; /* User data parameter */ 1784 FuncDef *pNext; /* Next function with same name */ 1785 void (*xSFunc)(sqlite3_context*,int,sqlite3_value**); /* func or agg-step */ 1786 void (*xFinalize)(sqlite3_context*); /* Agg finalizer */ 1787 void (*xValue)(sqlite3_context*); /* Current agg value */ 1788 void (*xInverse)(sqlite3_context*,int,sqlite3_value**); /* inverse agg-step */ 1789 const char *zName; /* SQL name of the function. */ 1790 union { 1791 FuncDef *pHash; /* Next with a different name but the same hash */ 1792 FuncDestructor *pDestructor; /* Reference counted destructor function */ 1793 } u; /* pHash if SQLITE_FUNC_BUILTIN, pDestructor otherwise */ 1794 }; 1795 1796 /* 1797 ** This structure encapsulates a user-function destructor callback (as 1798 ** configured using create_function_v2()) and a reference counter. When 1799 ** create_function_v2() is called to create a function with a destructor, 1800 ** a single object of this type is allocated. FuncDestructor.nRef is set to 1801 ** the number of FuncDef objects created (either 1 or 3, depending on whether 1802 ** or not the specified encoding is SQLITE_ANY). The FuncDef.pDestructor 1803 ** member of each of the new FuncDef objects is set to point to the allocated 1804 ** FuncDestructor. 1805 ** 1806 ** Thereafter, when one of the FuncDef objects is deleted, the reference 1807 ** count on this object is decremented. When it reaches 0, the destructor 1808 ** is invoked and the FuncDestructor structure freed. 1809 */ 1810 struct FuncDestructor { 1811 int nRef; 1812 void (*xDestroy)(void *); 1813 void *pUserData; 1814 }; 1815 1816 /* 1817 ** Possible values for FuncDef.flags. Note that the _LENGTH and _TYPEOF 1818 ** values must correspond to OPFLAG_LENGTHARG and OPFLAG_TYPEOFARG. And 1819 ** SQLITE_FUNC_CONSTANT must be the same as SQLITE_DETERMINISTIC. There 1820 ** are assert() statements in the code to verify this. 1821 ** 1822 ** Value constraints (enforced via assert()): 1823 ** SQLITE_FUNC_MINMAX == NC_MinMaxAgg == SF_MinMaxAgg 1824 ** SQLITE_FUNC_ANYORDER == NC_OrderAgg == SF_OrderByReqd 1825 ** SQLITE_FUNC_LENGTH == OPFLAG_LENGTHARG 1826 ** SQLITE_FUNC_TYPEOF == OPFLAG_TYPEOFARG 1827 ** SQLITE_FUNC_CONSTANT == SQLITE_DETERMINISTIC from the API 1828 ** SQLITE_FUNC_DIRECT == SQLITE_DIRECTONLY from the API 1829 ** SQLITE_FUNC_UNSAFE == SQLITE_INNOCUOUS 1830 ** SQLITE_FUNC_ENCMASK depends on SQLITE_UTF* macros in the API 1831 */ 1832 #define SQLITE_FUNC_ENCMASK 0x0003 /* SQLITE_UTF8, SQLITE_UTF16BE or UTF16LE */ 1833 #define SQLITE_FUNC_LIKE 0x0004 /* Candidate for the LIKE optimization */ 1834 #define SQLITE_FUNC_CASE 0x0008 /* Case-sensitive LIKE-type function */ 1835 #define SQLITE_FUNC_EPHEM 0x0010 /* Ephemeral. Delete with VDBE */ 1836 #define SQLITE_FUNC_NEEDCOLL 0x0020 /* sqlite3GetFuncCollSeq() might be called*/ 1837 #define SQLITE_FUNC_LENGTH 0x0040 /* Built-in length() function */ 1838 #define SQLITE_FUNC_TYPEOF 0x0080 /* Built-in typeof() function */ 1839 #define SQLITE_FUNC_COUNT 0x0100 /* Built-in count(*) aggregate */ 1840 /* 0x0200 -- available for reuse */ 1841 #define SQLITE_FUNC_UNLIKELY 0x0400 /* Built-in unlikely() function */ 1842 #define SQLITE_FUNC_CONSTANT 0x0800 /* Constant inputs give a constant output */ 1843 #define SQLITE_FUNC_MINMAX 0x1000 /* True for min() and max() aggregates */ 1844 #define SQLITE_FUNC_SLOCHNG 0x2000 /* "Slow Change". Value constant during a 1845 ** single query - might change over time */ 1846 #define SQLITE_FUNC_TEST 0x4000 /* Built-in testing functions */ 1847 #define SQLITE_FUNC_OFFSET 0x8000 /* Built-in sqlite_offset() function */ 1848 #define SQLITE_FUNC_WINDOW 0x00010000 /* Built-in window-only function */ 1849 #define SQLITE_FUNC_INTERNAL 0x00040000 /* For use by NestedParse() only */ 1850 #define SQLITE_FUNC_DIRECT 0x00080000 /* Not for use in TRIGGERs or VIEWs */ 1851 #define SQLITE_FUNC_SUBTYPE 0x00100000 /* Result likely to have sub-type */ 1852 #define SQLITE_FUNC_UNSAFE 0x00200000 /* Function has side effects */ 1853 #define SQLITE_FUNC_INLINE 0x00400000 /* Functions implemented in-line */ 1854 #define SQLITE_FUNC_BUILTIN 0x00800000 /* This is a built-in function */ 1855 #define SQLITE_FUNC_ANYORDER 0x08000000 /* count/min/max aggregate */ 1856 1857 /* Identifier numbers for each in-line function */ 1858 #define INLINEFUNC_coalesce 0 1859 #define INLINEFUNC_implies_nonnull_row 1 1860 #define INLINEFUNC_expr_implies_expr 2 1861 #define INLINEFUNC_expr_compare 3 1862 #define INLINEFUNC_affinity 4 1863 #define INLINEFUNC_iif 5 1864 #define INLINEFUNC_unlikely 99 /* Default case */ 1865 1866 /* 1867 ** The following three macros, FUNCTION(), LIKEFUNC() and AGGREGATE() are 1868 ** used to create the initializers for the FuncDef structures. 1869 ** 1870 ** FUNCTION(zName, nArg, iArg, bNC, xFunc) 1871 ** Used to create a scalar function definition of a function zName 1872 ** implemented by C function xFunc that accepts nArg arguments. The 1873 ** value passed as iArg is cast to a (void*) and made available 1874 ** as the user-data (sqlite3_user_data()) for the function. If 1875 ** argument bNC is true, then the SQLITE_FUNC_NEEDCOLL flag is set. 1876 ** 1877 ** VFUNCTION(zName, nArg, iArg, bNC, xFunc) 1878 ** Like FUNCTION except it omits the SQLITE_FUNC_CONSTANT flag. 1879 ** 1880 ** SFUNCTION(zName, nArg, iArg, bNC, xFunc) 1881 ** Like FUNCTION except it omits the SQLITE_FUNC_CONSTANT flag and 1882 ** adds the SQLITE_DIRECTONLY flag. 1883 ** 1884 ** INLINE_FUNC(zName, nArg, iFuncId, mFlags) 1885 ** zName is the name of a function that is implemented by in-line 1886 ** byte code rather than by the usual callbacks. The iFuncId 1887 ** parameter determines the function id. The mFlags parameter is 1888 ** optional SQLITE_FUNC_ flags for this function. 1889 ** 1890 ** TEST_FUNC(zName, nArg, iFuncId, mFlags) 1891 ** zName is the name of a test-only function implemented by in-line 1892 ** byte code rather than by the usual callbacks. The iFuncId 1893 ** parameter determines the function id. The mFlags parameter is 1894 ** optional SQLITE_FUNC_ flags for this function. 1895 ** 1896 ** DFUNCTION(zName, nArg, iArg, bNC, xFunc) 1897 ** Like FUNCTION except it omits the SQLITE_FUNC_CONSTANT flag and 1898 ** adds the SQLITE_FUNC_SLOCHNG flag. Used for date & time functions 1899 ** and functions like sqlite_version() that can change, but not during 1900 ** a single query. The iArg is ignored. The user-data is always set 1901 ** to a NULL pointer. The bNC parameter is not used. 1902 ** 1903 ** MFUNCTION(zName, nArg, xPtr, xFunc) 1904 ** For math-library functions. xPtr is an arbitrary pointer. 1905 ** 1906 ** PURE_DATE(zName, nArg, iArg, bNC, xFunc) 1907 ** Used for "pure" date/time functions, this macro is like DFUNCTION 1908 ** except that it does set the SQLITE_FUNC_CONSTANT flags. iArg is 1909 ** ignored and the user-data for these functions is set to an 1910 ** arbitrary non-NULL pointer. The bNC parameter is not used. 1911 ** 1912 ** AGGREGATE(zName, nArg, iArg, bNC, xStep, xFinal) 1913 ** Used to create an aggregate function definition implemented by 1914 ** the C functions xStep and xFinal. The first four parameters 1915 ** are interpreted in the same way as the first 4 parameters to 1916 ** FUNCTION(). 1917 ** 1918 ** WFUNCTION(zName, nArg, iArg, xStep, xFinal, xValue, xInverse) 1919 ** Used to create an aggregate function definition implemented by 1920 ** the C functions xStep and xFinal. The first four parameters 1921 ** are interpreted in the same way as the first 4 parameters to 1922 ** FUNCTION(). 1923 ** 1924 ** LIKEFUNC(zName, nArg, pArg, flags) 1925 ** Used to create a scalar function definition of a function zName 1926 ** that accepts nArg arguments and is implemented by a call to C 1927 ** function likeFunc. Argument pArg is cast to a (void *) and made 1928 ** available as the function user-data (sqlite3_user_data()). The 1929 ** FuncDef.flags variable is set to the value passed as the flags 1930 ** parameter. 1931 */ 1932 #define FUNCTION(zName, nArg, iArg, bNC, xFunc) \ 1933 {nArg, SQLITE_FUNC_BUILTIN|\ 1934 SQLITE_FUNC_CONSTANT|SQLITE_UTF8|(bNC*SQLITE_FUNC_NEEDCOLL), \ 1935 SQLITE_INT_TO_PTR(iArg), 0, xFunc, 0, 0, 0, #zName, {0} } 1936 #define VFUNCTION(zName, nArg, iArg, bNC, xFunc) \ 1937 {nArg, SQLITE_FUNC_BUILTIN|SQLITE_UTF8|(bNC*SQLITE_FUNC_NEEDCOLL), \ 1938 SQLITE_INT_TO_PTR(iArg), 0, xFunc, 0, 0, 0, #zName, {0} } 1939 #define SFUNCTION(zName, nArg, iArg, bNC, xFunc) \ 1940 {nArg, SQLITE_FUNC_BUILTIN|SQLITE_UTF8|SQLITE_DIRECTONLY|SQLITE_FUNC_UNSAFE, \ 1941 SQLITE_INT_TO_PTR(iArg), 0, xFunc, 0, 0, 0, #zName, {0} } 1942 #define MFUNCTION(zName, nArg, xPtr, xFunc) \ 1943 {nArg, SQLITE_FUNC_BUILTIN|SQLITE_FUNC_CONSTANT|SQLITE_UTF8, \ 1944 xPtr, 0, xFunc, 0, 0, 0, #zName, {0} } 1945 #define INLINE_FUNC(zName, nArg, iArg, mFlags) \ 1946 {nArg, SQLITE_FUNC_BUILTIN|\ 1947 SQLITE_UTF8|SQLITE_FUNC_INLINE|SQLITE_FUNC_CONSTANT|(mFlags), \ 1948 SQLITE_INT_TO_PTR(iArg), 0, noopFunc, 0, 0, 0, #zName, {0} } 1949 #define TEST_FUNC(zName, nArg, iArg, mFlags) \ 1950 {nArg, SQLITE_FUNC_BUILTIN|\ 1951 SQLITE_UTF8|SQLITE_FUNC_INTERNAL|SQLITE_FUNC_TEST| \ 1952 SQLITE_FUNC_INLINE|SQLITE_FUNC_CONSTANT|(mFlags), \ 1953 SQLITE_INT_TO_PTR(iArg), 0, noopFunc, 0, 0, 0, #zName, {0} } 1954 #define DFUNCTION(zName, nArg, iArg, bNC, xFunc) \ 1955 {nArg, SQLITE_FUNC_BUILTIN|SQLITE_FUNC_SLOCHNG|SQLITE_UTF8, \ 1956 0, 0, xFunc, 0, 0, 0, #zName, {0} } 1957 #define PURE_DATE(zName, nArg, iArg, bNC, xFunc) \ 1958 {nArg, SQLITE_FUNC_BUILTIN|\ 1959 SQLITE_FUNC_SLOCHNG|SQLITE_UTF8|SQLITE_FUNC_CONSTANT, \ 1960 (void*)&sqlite3Config, 0, xFunc, 0, 0, 0, #zName, {0} } 1961 #define FUNCTION2(zName, nArg, iArg, bNC, xFunc, extraFlags) \ 1962 {nArg, SQLITE_FUNC_BUILTIN|\ 1963 SQLITE_FUNC_CONSTANT|SQLITE_UTF8|(bNC*SQLITE_FUNC_NEEDCOLL)|extraFlags,\ 1964 SQLITE_INT_TO_PTR(iArg), 0, xFunc, 0, 0, 0, #zName, {0} } 1965 #define STR_FUNCTION(zName, nArg, pArg, bNC, xFunc) \ 1966 {nArg, SQLITE_FUNC_BUILTIN|\ 1967 SQLITE_FUNC_SLOCHNG|SQLITE_UTF8|(bNC*SQLITE_FUNC_NEEDCOLL), \ 1968 pArg, 0, xFunc, 0, 0, 0, #zName, } 1969 #define LIKEFUNC(zName, nArg, arg, flags) \ 1970 {nArg, SQLITE_FUNC_BUILTIN|SQLITE_FUNC_CONSTANT|SQLITE_UTF8|flags, \ 1971 (void *)arg, 0, likeFunc, 0, 0, 0, #zName, {0} } 1972 #define WAGGREGATE(zName, nArg, arg, nc, xStep, xFinal, xValue, xInverse, f) \ 1973 {nArg, SQLITE_FUNC_BUILTIN|SQLITE_UTF8|(nc*SQLITE_FUNC_NEEDCOLL)|f, \ 1974 SQLITE_INT_TO_PTR(arg), 0, xStep,xFinal,xValue,xInverse,#zName, {0}} 1975 #define INTERNAL_FUNCTION(zName, nArg, xFunc) \ 1976 {nArg, SQLITE_FUNC_BUILTIN|\ 1977 SQLITE_FUNC_INTERNAL|SQLITE_UTF8|SQLITE_FUNC_CONSTANT, \ 1978 0, 0, xFunc, 0, 0, 0, #zName, {0} } 1979 1980 1981 /* 1982 ** All current savepoints are stored in a linked list starting at 1983 ** sqlite3.pSavepoint. The first element in the list is the most recently 1984 ** opened savepoint. Savepoints are added to the list by the vdbe 1985 ** OP_Savepoint instruction. 1986 */ 1987 struct Savepoint { 1988 char *zName; /* Savepoint name (nul-terminated) */ 1989 i64 nDeferredCons; /* Number of deferred fk violations */ 1990 i64 nDeferredImmCons; /* Number of deferred imm fk. */ 1991 Savepoint *pNext; /* Parent savepoint (if any) */ 1992 }; 1993 1994 /* 1995 ** The following are used as the second parameter to sqlite3Savepoint(), 1996 ** and as the P1 argument to the OP_Savepoint instruction. 1997 */ 1998 #define SAVEPOINT_BEGIN 0 1999 #define SAVEPOINT_RELEASE 1 2000 #define SAVEPOINT_ROLLBACK 2 2001 2002 2003 /* 2004 ** Each SQLite module (virtual table definition) is defined by an 2005 ** instance of the following structure, stored in the sqlite3.aModule 2006 ** hash table. 2007 */ 2008 struct Module { 2009 const sqlite3_module *pModule; /* Callback pointers */ 2010 const char *zName; /* Name passed to create_module() */ 2011 int nRefModule; /* Number of pointers to this object */ 2012 void *pAux; /* pAux passed to create_module() */ 2013 void (*xDestroy)(void *); /* Module destructor function */ 2014 Table *pEpoTab; /* Eponymous table for this module */ 2015 }; 2016 2017 /* 2018 ** Information about each column of an SQL table is held in an instance 2019 ** of the Column structure, in the Table.aCol[] array. 2020 ** 2021 ** Definitions: 2022 ** 2023 ** "table column index" This is the index of the column in the 2024 ** Table.aCol[] array, and also the index of 2025 ** the column in the original CREATE TABLE stmt. 2026 ** 2027 ** "storage column index" This is the index of the column in the 2028 ** record BLOB generated by the OP_MakeRecord 2029 ** opcode. The storage column index is less than 2030 ** or equal to the table column index. It is 2031 ** equal if and only if there are no VIRTUAL 2032 ** columns to the left. 2033 ** 2034 ** Notes on zCnName: 2035 ** The zCnName field stores the name of the column, the datatype of the 2036 ** column, and the collating sequence for the column, in that order, all in 2037 ** a single allocation. Each string is 0x00 terminated. The datatype 2038 ** is only included if the COLFLAG_HASTYPE bit of colFlags is set and the 2039 ** collating sequence name is only included if the COLFLAG_HASCOLL bit is 2040 ** set. 2041 */ 2042 struct Column { 2043 char *zCnName; /* Name of this column */ 2044 unsigned notNull :4; /* An OE_ code for handling a NOT NULL constraint */ 2045 unsigned eCType :4; /* One of the standard types */ 2046 char affinity; /* One of the SQLITE_AFF_... values */ 2047 u8 szEst; /* Est size of value in this column. sizeof(INT)==1 */ 2048 u8 hName; /* Column name hash for faster lookup */ 2049 u16 iDflt; /* 1-based index of DEFAULT. 0 means "none" */ 2050 u16 colFlags; /* Boolean properties. See COLFLAG_ defines below */ 2051 }; 2052 2053 /* Allowed values for Column.eCType. 2054 ** 2055 ** Values must match entries in the global constant arrays 2056 ** sqlite3StdTypeLen[] and sqlite3StdType[]. Each value is one more 2057 ** than the offset into these arrays for the corresponding name. 2058 ** Adjust the SQLITE_N_STDTYPE value if adding or removing entries. 2059 */ 2060 #define COLTYPE_CUSTOM 0 /* Type appended to zName */ 2061 #define COLTYPE_ANY 1 2062 #define COLTYPE_BLOB 2 2063 #define COLTYPE_INT 3 2064 #define COLTYPE_INTEGER 4 2065 #define COLTYPE_REAL 5 2066 #define COLTYPE_TEXT 6 2067 #define SQLITE_N_STDTYPE 6 /* Number of standard types */ 2068 2069 /* Allowed values for Column.colFlags. 2070 ** 2071 ** Constraints: 2072 ** TF_HasVirtual == COLFLAG_VIRTUAL 2073 ** TF_HasStored == COLFLAG_STORED 2074 ** TF_HasHidden == COLFLAG_HIDDEN 2075 */ 2076 #define COLFLAG_PRIMKEY 0x0001 /* Column is part of the primary key */ 2077 #define COLFLAG_HIDDEN 0x0002 /* A hidden column in a virtual table */ 2078 #define COLFLAG_HASTYPE 0x0004 /* Type name follows column name */ 2079 #define COLFLAG_UNIQUE 0x0008 /* Column def contains "UNIQUE" or "PK" */ 2080 #define COLFLAG_SORTERREF 0x0010 /* Use sorter-refs with this column */ 2081 #define COLFLAG_VIRTUAL 0x0020 /* GENERATED ALWAYS AS ... VIRTUAL */ 2082 #define COLFLAG_STORED 0x0040 /* GENERATED ALWAYS AS ... STORED */ 2083 #define COLFLAG_NOTAVAIL 0x0080 /* STORED column not yet calculated */ 2084 #define COLFLAG_BUSY 0x0100 /* Blocks recursion on GENERATED columns */ 2085 #define COLFLAG_HASCOLL 0x0200 /* Has collating sequence name in zCnName */ 2086 #define COLFLAG_GENERATED 0x0060 /* Combo: _STORED, _VIRTUAL */ 2087 #define COLFLAG_NOINSERT 0x0062 /* Combo: _HIDDEN, _STORED, _VIRTUAL */ 2088 2089 /* 2090 ** A "Collating Sequence" is defined by an instance of the following 2091 ** structure. Conceptually, a collating sequence consists of a name and 2092 ** a comparison routine that defines the order of that sequence. 2093 ** 2094 ** If CollSeq.xCmp is NULL, it means that the 2095 ** collating sequence is undefined. Indices built on an undefined 2096 ** collating sequence may not be read or written. 2097 */ 2098 struct CollSeq { 2099 char *zName; /* Name of the collating sequence, UTF-8 encoded */ 2100 u8 enc; /* Text encoding handled by xCmp() */ 2101 void *pUser; /* First argument to xCmp() */ 2102 int (*xCmp)(void*,int, const void*, int, const void*); 2103 void (*xDel)(void*); /* Destructor for pUser */ 2104 }; 2105 2106 /* 2107 ** A sort order can be either ASC or DESC. 2108 */ 2109 #define SQLITE_SO_ASC 0 /* Sort in ascending order */ 2110 #define SQLITE_SO_DESC 1 /* Sort in ascending order */ 2111 #define SQLITE_SO_UNDEFINED -1 /* No sort order specified */ 2112 2113 /* 2114 ** Column affinity types. 2115 ** 2116 ** These used to have mnemonic name like 'i' for SQLITE_AFF_INTEGER and 2117 ** 't' for SQLITE_AFF_TEXT. But we can save a little space and improve 2118 ** the speed a little by numbering the values consecutively. 2119 ** 2120 ** But rather than start with 0 or 1, we begin with 'A'. That way, 2121 ** when multiple affinity types are concatenated into a string and 2122 ** used as the P4 operand, they will be more readable. 2123 ** 2124 ** Note also that the numeric types are grouped together so that testing 2125 ** for a numeric type is a single comparison. And the BLOB type is first. 2126 */ 2127 #define SQLITE_AFF_NONE 0x40 /* '@' */ 2128 #define SQLITE_AFF_BLOB 0x41 /* 'A' */ 2129 #define SQLITE_AFF_TEXT 0x42 /* 'B' */ 2130 #define SQLITE_AFF_NUMERIC 0x43 /* 'C' */ 2131 #define SQLITE_AFF_INTEGER 0x44 /* 'D' */ 2132 #define SQLITE_AFF_REAL 0x45 /* 'E' */ 2133 2134 #define sqlite3IsNumericAffinity(X) ((X)>=SQLITE_AFF_NUMERIC) 2135 2136 /* 2137 ** The SQLITE_AFF_MASK values masks off the significant bits of an 2138 ** affinity value. 2139 */ 2140 #define SQLITE_AFF_MASK 0x47 2141 2142 /* 2143 ** Additional bit values that can be ORed with an affinity without 2144 ** changing the affinity. 2145 ** 2146 ** The SQLITE_NOTNULL flag is a combination of NULLEQ and JUMPIFNULL. 2147 ** It causes an assert() to fire if either operand to a comparison 2148 ** operator is NULL. It is added to certain comparison operators to 2149 ** prove that the operands are always NOT NULL. 2150 */ 2151 #define SQLITE_JUMPIFNULL 0x10 /* jumps if either operand is NULL */ 2152 #define SQLITE_NULLEQ 0x80 /* NULL=NULL */ 2153 #define SQLITE_NOTNULL 0x90 /* Assert that operands are never NULL */ 2154 2155 /* 2156 ** An object of this type is created for each virtual table present in 2157 ** the database schema. 2158 ** 2159 ** If the database schema is shared, then there is one instance of this 2160 ** structure for each database connection (sqlite3*) that uses the shared 2161 ** schema. This is because each database connection requires its own unique 2162 ** instance of the sqlite3_vtab* handle used to access the virtual table 2163 ** implementation. sqlite3_vtab* handles can not be shared between 2164 ** database connections, even when the rest of the in-memory database 2165 ** schema is shared, as the implementation often stores the database 2166 ** connection handle passed to it via the xConnect() or xCreate() method 2167 ** during initialization internally. This database connection handle may 2168 ** then be used by the virtual table implementation to access real tables 2169 ** within the database. So that they appear as part of the callers 2170 ** transaction, these accesses need to be made via the same database 2171 ** connection as that used to execute SQL operations on the virtual table. 2172 ** 2173 ** All VTable objects that correspond to a single table in a shared 2174 ** database schema are initially stored in a linked-list pointed to by 2175 ** the Table.pVTable member variable of the corresponding Table object. 2176 ** When an sqlite3_prepare() operation is required to access the virtual 2177 ** table, it searches the list for the VTable that corresponds to the 2178 ** database connection doing the preparing so as to use the correct 2179 ** sqlite3_vtab* handle in the compiled query. 2180 ** 2181 ** When an in-memory Table object is deleted (for example when the 2182 ** schema is being reloaded for some reason), the VTable objects are not 2183 ** deleted and the sqlite3_vtab* handles are not xDisconnect()ed 2184 ** immediately. Instead, they are moved from the Table.pVTable list to 2185 ** another linked list headed by the sqlite3.pDisconnect member of the 2186 ** corresponding sqlite3 structure. They are then deleted/xDisconnected 2187 ** next time a statement is prepared using said sqlite3*. This is done 2188 ** to avoid deadlock issues involving multiple sqlite3.mutex mutexes. 2189 ** Refer to comments above function sqlite3VtabUnlockList() for an 2190 ** explanation as to why it is safe to add an entry to an sqlite3.pDisconnect 2191 ** list without holding the corresponding sqlite3.mutex mutex. 2192 ** 2193 ** The memory for objects of this type is always allocated by 2194 ** sqlite3DbMalloc(), using the connection handle stored in VTable.db as 2195 ** the first argument. 2196 */ 2197 struct VTable { 2198 sqlite3 *db; /* Database connection associated with this table */ 2199 Module *pMod; /* Pointer to module implementation */ 2200 sqlite3_vtab *pVtab; /* Pointer to vtab instance */ 2201 int nRef; /* Number of pointers to this structure */ 2202 u8 bConstraint; /* True if constraints are supported */ 2203 u8 eVtabRisk; /* Riskiness of allowing hacker access */ 2204 int iSavepoint; /* Depth of the SAVEPOINT stack */ 2205 VTable *pNext; /* Next in linked list (see above) */ 2206 }; 2207 2208 /* Allowed values for VTable.eVtabRisk 2209 */ 2210 #define SQLITE_VTABRISK_Low 0 2211 #define SQLITE_VTABRISK_Normal 1 2212 #define SQLITE_VTABRISK_High 2 2213 2214 /* 2215 ** The schema for each SQL table, virtual table, and view is represented 2216 ** in memory by an instance of the following structure. 2217 */ 2218 struct Table { 2219 char *zName; /* Name of the table or view */ 2220 Column *aCol; /* Information about each column */ 2221 Index *pIndex; /* List of SQL indexes on this table. */ 2222 char *zColAff; /* String defining the affinity of each column */ 2223 ExprList *pCheck; /* All CHECK constraints */ 2224 /* ... also used as column name list in a VIEW */ 2225 Pgno tnum; /* Root BTree page for this table */ 2226 u32 nTabRef; /* Number of pointers to this Table */ 2227 u32 tabFlags; /* Mask of TF_* values */ 2228 i16 iPKey; /* If not negative, use aCol[iPKey] as the rowid */ 2229 i16 nCol; /* Number of columns in this table */ 2230 i16 nNVCol; /* Number of columns that are not VIRTUAL */ 2231 LogEst nRowLogEst; /* Estimated rows in table - from sqlite_stat1 table */ 2232 LogEst szTabRow; /* Estimated size of each table row in bytes */ 2233 #ifdef SQLITE_ENABLE_COSTMULT 2234 LogEst costMult; /* Cost multiplier for using this table */ 2235 #endif 2236 u8 keyConf; /* What to do in case of uniqueness conflict on iPKey */ 2237 u8 eTabType; /* 0: normal, 1: virtual, 2: view */ 2238 union { 2239 struct { /* Used by ordinary tables: */ 2240 int addColOffset; /* Offset in CREATE TABLE stmt to add a new column */ 2241 FKey *pFKey; /* Linked list of all foreign keys in this table */ 2242 ExprList *pDfltList; /* DEFAULT clauses on various columns. 2243 ** Or the AS clause for generated columns. */ 2244 } tab; 2245 struct { /* Used by views: */ 2246 Select *pSelect; /* View definition */ 2247 } view; 2248 struct { /* Used by virtual tables only: */ 2249 int nArg; /* Number of arguments to the module */ 2250 char **azArg; /* 0: module 1: schema 2: vtab name 3...: args */ 2251 VTable *p; /* List of VTable objects. */ 2252 } vtab; 2253 } u; 2254 Trigger *pTrigger; /* List of triggers on this object */ 2255 Schema *pSchema; /* Schema that contains this table */ 2256 }; 2257 2258 /* 2259 ** Allowed values for Table.tabFlags. 2260 ** 2261 ** TF_OOOHidden applies to tables or view that have hidden columns that are 2262 ** followed by non-hidden columns. Example: "CREATE VIRTUAL TABLE x USING 2263 ** vtab1(a HIDDEN, b);". Since "b" is a non-hidden column but "a" is hidden, 2264 ** the TF_OOOHidden attribute would apply in this case. Such tables require 2265 ** special handling during INSERT processing. The "OOO" means "Out Of Order". 2266 ** 2267 ** Constraints: 2268 ** 2269 ** TF_HasVirtual == COLFLAG_VIRTUAL 2270 ** TF_HasStored == COLFLAG_STORED 2271 ** TF_HasHidden == COLFLAG_HIDDEN 2272 */ 2273 #define TF_Readonly 0x00000001 /* Read-only system table */ 2274 #define TF_HasHidden 0x00000002 /* Has one or more hidden columns */ 2275 #define TF_HasPrimaryKey 0x00000004 /* Table has a primary key */ 2276 #define TF_Autoincrement 0x00000008 /* Integer primary key is autoincrement */ 2277 #define TF_HasStat1 0x00000010 /* nRowLogEst set from sqlite_stat1 */ 2278 #define TF_HasVirtual 0x00000020 /* Has one or more VIRTUAL columns */ 2279 #define TF_HasStored 0x00000040 /* Has one or more STORED columns */ 2280 #define TF_HasGenerated 0x00000060 /* Combo: HasVirtual + HasStored */ 2281 #define TF_WithoutRowid 0x00000080 /* No rowid. PRIMARY KEY is the key */ 2282 #define TF_StatsUsed 0x00000100 /* Query planner decisions affected by 2283 ** Index.aiRowLogEst[] values */ 2284 #define TF_NoVisibleRowid 0x00000200 /* No user-visible "rowid" column */ 2285 #define TF_OOOHidden 0x00000400 /* Out-of-Order hidden columns */ 2286 #define TF_HasNotNull 0x00000800 /* Contains NOT NULL constraints */ 2287 #define TF_Shadow 0x00001000 /* True for a shadow table */ 2288 #define TF_HasStat4 0x00002000 /* STAT4 info available for this table */ 2289 #define TF_Ephemeral 0x00004000 /* An ephemeral table */ 2290 #define TF_Eponymous 0x00008000 /* An eponymous virtual table */ 2291 #define TF_Strict 0x00010000 /* STRICT mode */ 2292 2293 /* 2294 ** Allowed values for Table.eTabType 2295 */ 2296 #define TABTYP_NORM 0 /* Ordinary table */ 2297 #define TABTYP_VTAB 1 /* Virtual table */ 2298 #define TABTYP_VIEW 2 /* A view */ 2299 2300 #define IsView(X) ((X)->eTabType==TABTYP_VIEW) 2301 #define IsOrdinaryTable(X) ((X)->eTabType==TABTYP_NORM) 2302 2303 /* 2304 ** Test to see whether or not a table is a virtual table. This is 2305 ** done as a macro so that it will be optimized out when virtual 2306 ** table support is omitted from the build. 2307 */ 2308 #ifndef SQLITE_OMIT_VIRTUALTABLE 2309 # define IsVirtual(X) ((X)->eTabType==TABTYP_VTAB) 2310 # define ExprIsVtab(X) \ 2311 ((X)->op==TK_COLUMN && (X)->y.pTab!=0 && (X)->y.pTab->eTabType==TABTYP_VTAB) 2312 #else 2313 # define IsVirtual(X) 0 2314 # define ExprIsVtab(X) 0 2315 #endif 2316 2317 /* 2318 ** Macros to determine if a column is hidden. IsOrdinaryHiddenColumn() 2319 ** only works for non-virtual tables (ordinary tables and views) and is 2320 ** always false unless SQLITE_ENABLE_HIDDEN_COLUMNS is defined. The 2321 ** IsHiddenColumn() macro is general purpose. 2322 */ 2323 #if defined(SQLITE_ENABLE_HIDDEN_COLUMNS) 2324 # define IsHiddenColumn(X) (((X)->colFlags & COLFLAG_HIDDEN)!=0) 2325 # define IsOrdinaryHiddenColumn(X) (((X)->colFlags & COLFLAG_HIDDEN)!=0) 2326 #elif !defined(SQLITE_OMIT_VIRTUALTABLE) 2327 # define IsHiddenColumn(X) (((X)->colFlags & COLFLAG_HIDDEN)!=0) 2328 # define IsOrdinaryHiddenColumn(X) 0 2329 #else 2330 # define IsHiddenColumn(X) 0 2331 # define IsOrdinaryHiddenColumn(X) 0 2332 #endif 2333 2334 2335 /* Does the table have a rowid */ 2336 #define HasRowid(X) (((X)->tabFlags & TF_WithoutRowid)==0) 2337 #define VisibleRowid(X) (((X)->tabFlags & TF_NoVisibleRowid)==0) 2338 2339 /* 2340 ** Each foreign key constraint is an instance of the following structure. 2341 ** 2342 ** A foreign key is associated with two tables. The "from" table is 2343 ** the table that contains the REFERENCES clause that creates the foreign 2344 ** key. The "to" table is the table that is named in the REFERENCES clause. 2345 ** Consider this example: 2346 ** 2347 ** CREATE TABLE ex1( 2348 ** a INTEGER PRIMARY KEY, 2349 ** b INTEGER CONSTRAINT fk1 REFERENCES ex2(x) 2350 ** ); 2351 ** 2352 ** For foreign key "fk1", the from-table is "ex1" and the to-table is "ex2". 2353 ** Equivalent names: 2354 ** 2355 ** from-table == child-table 2356 ** to-table == parent-table 2357 ** 2358 ** Each REFERENCES clause generates an instance of the following structure 2359 ** which is attached to the from-table. The to-table need not exist when 2360 ** the from-table is created. The existence of the to-table is not checked. 2361 ** 2362 ** The list of all parents for child Table X is held at X.pFKey. 2363 ** 2364 ** A list of all children for a table named Z (which might not even exist) 2365 ** is held in Schema.fkeyHash with a hash key of Z. 2366 */ 2367 struct FKey { 2368 Table *pFrom; /* Table containing the REFERENCES clause (aka: Child) */ 2369 FKey *pNextFrom; /* Next FKey with the same in pFrom. Next parent of pFrom */ 2370 char *zTo; /* Name of table that the key points to (aka: Parent) */ 2371 FKey *pNextTo; /* Next with the same zTo. Next child of zTo. */ 2372 FKey *pPrevTo; /* Previous with the same zTo */ 2373 int nCol; /* Number of columns in this key */ 2374 /* EV: R-30323-21917 */ 2375 u8 isDeferred; /* True if constraint checking is deferred till COMMIT */ 2376 u8 aAction[2]; /* ON DELETE and ON UPDATE actions, respectively */ 2377 Trigger *apTrigger[2];/* Triggers for aAction[] actions */ 2378 struct sColMap { /* Mapping of columns in pFrom to columns in zTo */ 2379 int iFrom; /* Index of column in pFrom */ 2380 char *zCol; /* Name of column in zTo. If NULL use PRIMARY KEY */ 2381 } aCol[1]; /* One entry for each of nCol columns */ 2382 }; 2383 2384 /* 2385 ** SQLite supports many different ways to resolve a constraint 2386 ** error. ROLLBACK processing means that a constraint violation 2387 ** causes the operation in process to fail and for the current transaction 2388 ** to be rolled back. ABORT processing means the operation in process 2389 ** fails and any prior changes from that one operation are backed out, 2390 ** but the transaction is not rolled back. FAIL processing means that 2391 ** the operation in progress stops and returns an error code. But prior 2392 ** changes due to the same operation are not backed out and no rollback 2393 ** occurs. IGNORE means that the particular row that caused the constraint 2394 ** error is not inserted or updated. Processing continues and no error 2395 ** is returned. REPLACE means that preexisting database rows that caused 2396 ** a UNIQUE constraint violation are removed so that the new insert or 2397 ** update can proceed. Processing continues and no error is reported. 2398 ** UPDATE applies to insert operations only and means that the insert 2399 ** is omitted and the DO UPDATE clause of an upsert is run instead. 2400 ** 2401 ** RESTRICT, SETNULL, SETDFLT, and CASCADE actions apply only to foreign keys. 2402 ** RESTRICT is the same as ABORT for IMMEDIATE foreign keys and the 2403 ** same as ROLLBACK for DEFERRED keys. SETNULL means that the foreign 2404 ** key is set to NULL. SETDFLT means that the foreign key is set 2405 ** to its default value. CASCADE means that a DELETE or UPDATE of the 2406 ** referenced table row is propagated into the row that holds the 2407 ** foreign key. 2408 ** 2409 ** The OE_Default value is a place holder that means to use whatever 2410 ** conflict resolution algorthm is required from context. 2411 ** 2412 ** The following symbolic values are used to record which type 2413 ** of conflict resolution action to take. 2414 */ 2415 #define OE_None 0 /* There is no constraint to check */ 2416 #define OE_Rollback 1 /* Fail the operation and rollback the transaction */ 2417 #define OE_Abort 2 /* Back out changes but do no rollback transaction */ 2418 #define OE_Fail 3 /* Stop the operation but leave all prior changes */ 2419 #define OE_Ignore 4 /* Ignore the error. Do not do the INSERT or UPDATE */ 2420 #define OE_Replace 5 /* Delete existing record, then do INSERT or UPDATE */ 2421 #define OE_Update 6 /* Process as a DO UPDATE in an upsert */ 2422 #define OE_Restrict 7 /* OE_Abort for IMMEDIATE, OE_Rollback for DEFERRED */ 2423 #define OE_SetNull 8 /* Set the foreign key value to NULL */ 2424 #define OE_SetDflt 9 /* Set the foreign key value to its default */ 2425 #define OE_Cascade 10 /* Cascade the changes */ 2426 #define OE_Default 11 /* Do whatever the default action is */ 2427 2428 2429 /* 2430 ** An instance of the following structure is passed as the first 2431 ** argument to sqlite3VdbeKeyCompare and is used to control the 2432 ** comparison of the two index keys. 2433 ** 2434 ** Note that aSortOrder[] and aColl[] have nField+1 slots. There 2435 ** are nField slots for the columns of an index then one extra slot 2436 ** for the rowid at the end. 2437 */ 2438 struct KeyInfo { 2439 u32 nRef; /* Number of references to this KeyInfo object */ 2440 u8 enc; /* Text encoding - one of the SQLITE_UTF* values */ 2441 u16 nKeyField; /* Number of key columns in the index */ 2442 u16 nAllField; /* Total columns, including key plus others */ 2443 sqlite3 *db; /* The database connection */ 2444 u8 *aSortFlags; /* Sort order for each column. */ 2445 CollSeq *aColl[1]; /* Collating sequence for each term of the key */ 2446 }; 2447 2448 /* 2449 ** Allowed bit values for entries in the KeyInfo.aSortFlags[] array. 2450 */ 2451 #define KEYINFO_ORDER_DESC 0x01 /* DESC sort order */ 2452 #define KEYINFO_ORDER_BIGNULL 0x02 /* NULL is larger than any other value */ 2453 2454 /* 2455 ** This object holds a record which has been parsed out into individual 2456 ** fields, for the purposes of doing a comparison. 2457 ** 2458 ** A record is an object that contains one or more fields of data. 2459 ** Records are used to store the content of a table row and to store 2460 ** the key of an index. A blob encoding of a record is created by 2461 ** the OP_MakeRecord opcode of the VDBE and is disassembled by the 2462 ** OP_Column opcode. 2463 ** 2464 ** An instance of this object serves as a "key" for doing a search on 2465 ** an index b+tree. The goal of the search is to find the entry that 2466 ** is closed to the key described by this object. This object might hold 2467 ** just a prefix of the key. The number of fields is given by 2468 ** pKeyInfo->nField. 2469 ** 2470 ** The r1 and r2 fields are the values to return if this key is less than 2471 ** or greater than a key in the btree, respectively. These are normally 2472 ** -1 and +1 respectively, but might be inverted to +1 and -1 if the b-tree 2473 ** is in DESC order. 2474 ** 2475 ** The key comparison functions actually return default_rc when they find 2476 ** an equals comparison. default_rc can be -1, 0, or +1. If there are 2477 ** multiple entries in the b-tree with the same key (when only looking 2478 ** at the first pKeyInfo->nFields,) then default_rc can be set to -1 to 2479 ** cause the search to find the last match, or +1 to cause the search to 2480 ** find the first match. 2481 ** 2482 ** The key comparison functions will set eqSeen to true if they ever 2483 ** get and equal results when comparing this structure to a b-tree record. 2484 ** When default_rc!=0, the search might end up on the record immediately 2485 ** before the first match or immediately after the last match. The 2486 ** eqSeen field will indicate whether or not an exact match exists in the 2487 ** b-tree. 2488 */ 2489 struct UnpackedRecord { 2490 KeyInfo *pKeyInfo; /* Collation and sort-order information */ 2491 Mem *aMem; /* Values */ 2492 u16 nField; /* Number of entries in apMem[] */ 2493 i8 default_rc; /* Comparison result if keys are equal */ 2494 u8 errCode; /* Error detected by xRecordCompare (CORRUPT or NOMEM) */ 2495 i8 r1; /* Value to return if (lhs < rhs) */ 2496 i8 r2; /* Value to return if (lhs > rhs) */ 2497 u8 eqSeen; /* True if an equality comparison has been seen */ 2498 }; 2499 2500 2501 /* 2502 ** Each SQL index is represented in memory by an 2503 ** instance of the following structure. 2504 ** 2505 ** The columns of the table that are to be indexed are described 2506 ** by the aiColumn[] field of this structure. For example, suppose 2507 ** we have the following table and index: 2508 ** 2509 ** CREATE TABLE Ex1(c1 int, c2 int, c3 text); 2510 ** CREATE INDEX Ex2 ON Ex1(c3,c1); 2511 ** 2512 ** In the Table structure describing Ex1, nCol==3 because there are 2513 ** three columns in the table. In the Index structure describing 2514 ** Ex2, nColumn==2 since 2 of the 3 columns of Ex1 are indexed. 2515 ** The value of aiColumn is {2, 0}. aiColumn[0]==2 because the 2516 ** first column to be indexed (c3) has an index of 2 in Ex1.aCol[]. 2517 ** The second column to be indexed (c1) has an index of 0 in 2518 ** Ex1.aCol[], hence Ex2.aiColumn[1]==0. 2519 ** 2520 ** The Index.onError field determines whether or not the indexed columns 2521 ** must be unique and what to do if they are not. When Index.onError=OE_None, 2522 ** it means this is not a unique index. Otherwise it is a unique index 2523 ** and the value of Index.onError indicate the which conflict resolution 2524 ** algorithm to employ whenever an attempt is made to insert a non-unique 2525 ** element. 2526 ** 2527 ** While parsing a CREATE TABLE or CREATE INDEX statement in order to 2528 ** generate VDBE code (as opposed to parsing one read from an sqlite_schema 2529 ** table as part of parsing an existing database schema), transient instances 2530 ** of this structure may be created. In this case the Index.tnum variable is 2531 ** used to store the address of a VDBE instruction, not a database page 2532 ** number (it cannot - the database page is not allocated until the VDBE 2533 ** program is executed). See convertToWithoutRowidTable() for details. 2534 */ 2535 struct Index { 2536 char *zName; /* Name of this index */ 2537 i16 *aiColumn; /* Which columns are used by this index. 1st is 0 */ 2538 LogEst *aiRowLogEst; /* From ANALYZE: Est. rows selected by each column */ 2539 Table *pTable; /* The SQL table being indexed */ 2540 char *zColAff; /* String defining the affinity of each column */ 2541 Index *pNext; /* The next index associated with the same table */ 2542 Schema *pSchema; /* Schema containing this index */ 2543 u8 *aSortOrder; /* for each column: True==DESC, False==ASC */ 2544 const char **azColl; /* Array of collation sequence names for index */ 2545 Expr *pPartIdxWhere; /* WHERE clause for partial indices */ 2546 ExprList *aColExpr; /* Column expressions */ 2547 Pgno tnum; /* DB Page containing root of this index */ 2548 LogEst szIdxRow; /* Estimated average row size in bytes */ 2549 u16 nKeyCol; /* Number of columns forming the key */ 2550 u16 nColumn; /* Number of columns stored in the index */ 2551 u8 onError; /* OE_Abort, OE_Ignore, OE_Replace, or OE_None */ 2552 unsigned idxType:2; /* 0:Normal 1:UNIQUE, 2:PRIMARY KEY, 3:IPK */ 2553 unsigned bUnordered:1; /* Use this index for == or IN queries only */ 2554 unsigned uniqNotNull:1; /* True if UNIQUE and NOT NULL for all columns */ 2555 unsigned isResized:1; /* True if resizeIndexObject() has been called */ 2556 unsigned isCovering:1; /* True if this is a covering index */ 2557 unsigned noSkipScan:1; /* Do not try to use skip-scan if true */ 2558 unsigned hasStat1:1; /* aiRowLogEst values come from sqlite_stat1 */ 2559 unsigned bNoQuery:1; /* Do not use this index to optimize queries */ 2560 unsigned bAscKeyBug:1; /* True if the bba7b69f9849b5bf bug applies */ 2561 unsigned bHasVCol:1; /* Index references one or more VIRTUAL columns */ 2562 #ifdef SQLITE_ENABLE_STAT4 2563 int nSample; /* Number of elements in aSample[] */ 2564 int nSampleCol; /* Size of IndexSample.anEq[] and so on */ 2565 tRowcnt *aAvgEq; /* Average nEq values for keys not in aSample */ 2566 IndexSample *aSample; /* Samples of the left-most key */ 2567 tRowcnt *aiRowEst; /* Non-logarithmic stat1 data for this index */ 2568 tRowcnt nRowEst0; /* Non-logarithmic number of rows in the index */ 2569 #endif 2570 Bitmask colNotIdxed; /* 0 for unindexed columns in pTab */ 2571 }; 2572 2573 /* 2574 ** Allowed values for Index.idxType 2575 */ 2576 #define SQLITE_IDXTYPE_APPDEF 0 /* Created using CREATE INDEX */ 2577 #define SQLITE_IDXTYPE_UNIQUE 1 /* Implements a UNIQUE constraint */ 2578 #define SQLITE_IDXTYPE_PRIMARYKEY 2 /* Is the PRIMARY KEY for the table */ 2579 #define SQLITE_IDXTYPE_IPK 3 /* INTEGER PRIMARY KEY index */ 2580 2581 /* Return true if index X is a PRIMARY KEY index */ 2582 #define IsPrimaryKeyIndex(X) ((X)->idxType==SQLITE_IDXTYPE_PRIMARYKEY) 2583 2584 /* Return true if index X is a UNIQUE index */ 2585 #define IsUniqueIndex(X) ((X)->onError!=OE_None) 2586 2587 /* The Index.aiColumn[] values are normally positive integer. But 2588 ** there are some negative values that have special meaning: 2589 */ 2590 #define XN_ROWID (-1) /* Indexed column is the rowid */ 2591 #define XN_EXPR (-2) /* Indexed column is an expression */ 2592 2593 /* 2594 ** Each sample stored in the sqlite_stat4 table is represented in memory 2595 ** using a structure of this type. See documentation at the top of the 2596 ** analyze.c source file for additional information. 2597 */ 2598 struct IndexSample { 2599 void *p; /* Pointer to sampled record */ 2600 int n; /* Size of record in bytes */ 2601 tRowcnt *anEq; /* Est. number of rows where the key equals this sample */ 2602 tRowcnt *anLt; /* Est. number of rows where key is less than this sample */ 2603 tRowcnt *anDLt; /* Est. number of distinct keys less than this sample */ 2604 }; 2605 2606 /* 2607 ** Possible values to use within the flags argument to sqlite3GetToken(). 2608 */ 2609 #define SQLITE_TOKEN_QUOTED 0x1 /* Token is a quoted identifier. */ 2610 #define SQLITE_TOKEN_KEYWORD 0x2 /* Token is a keyword. */ 2611 2612 /* 2613 ** Each token coming out of the lexer is an instance of 2614 ** this structure. Tokens are also used as part of an expression. 2615 ** 2616 ** The memory that "z" points to is owned by other objects. Take care 2617 ** that the owner of the "z" string does not deallocate the string before 2618 ** the Token goes out of scope! Very often, the "z" points to some place 2619 ** in the middle of the Parse.zSql text. But it might also point to a 2620 ** static string. 2621 */ 2622 struct Token { 2623 const char *z; /* Text of the token. Not NULL-terminated! */ 2624 unsigned int n; /* Number of characters in this token */ 2625 }; 2626 2627 /* 2628 ** An instance of this structure contains information needed to generate 2629 ** code for a SELECT that contains aggregate functions. 2630 ** 2631 ** If Expr.op==TK_AGG_COLUMN or TK_AGG_FUNCTION then Expr.pAggInfo is a 2632 ** pointer to this structure. The Expr.iAgg field is the index in 2633 ** AggInfo.aCol[] or AggInfo.aFunc[] of information needed to generate 2634 ** code for that node. 2635 ** 2636 ** AggInfo.pGroupBy and AggInfo.aFunc.pExpr point to fields within the 2637 ** original Select structure that describes the SELECT statement. These 2638 ** fields do not need to be freed when deallocating the AggInfo structure. 2639 */ 2640 struct AggInfo { 2641 u8 directMode; /* Direct rendering mode means take data directly 2642 ** from source tables rather than from accumulators */ 2643 u8 useSortingIdx; /* In direct mode, reference the sorting index rather 2644 ** than the source table */ 2645 int sortingIdx; /* Cursor number of the sorting index */ 2646 int sortingIdxPTab; /* Cursor number of pseudo-table */ 2647 int nSortingColumn; /* Number of columns in the sorting index */ 2648 int mnReg, mxReg; /* Range of registers allocated for aCol and aFunc */ 2649 ExprList *pGroupBy; /* The group by clause */ 2650 struct AggInfo_col { /* For each column used in source tables */ 2651 Table *pTab; /* Source table */ 2652 Expr *pCExpr; /* The original expression */ 2653 int iTable; /* Cursor number of the source table */ 2654 int iMem; /* Memory location that acts as accumulator */ 2655 i16 iColumn; /* Column number within the source table */ 2656 i16 iSorterColumn; /* Column number in the sorting index */ 2657 } *aCol; 2658 int nColumn; /* Number of used entries in aCol[] */ 2659 int nAccumulator; /* Number of columns that show through to the output. 2660 ** Additional columns are used only as parameters to 2661 ** aggregate functions */ 2662 struct AggInfo_func { /* For each aggregate function */ 2663 Expr *pFExpr; /* Expression encoding the function */ 2664 FuncDef *pFunc; /* The aggregate function implementation */ 2665 int iMem; /* Memory location that acts as accumulator */ 2666 int iDistinct; /* Ephemeral table used to enforce DISTINCT */ 2667 int iDistAddr; /* Address of OP_OpenEphemeral */ 2668 } *aFunc; 2669 int nFunc; /* Number of entries in aFunc[] */ 2670 u32 selId; /* Select to which this AggInfo belongs */ 2671 }; 2672 2673 /* 2674 ** The datatype ynVar is a signed integer, either 16-bit or 32-bit. 2675 ** Usually it is 16-bits. But if SQLITE_MAX_VARIABLE_NUMBER is greater 2676 ** than 32767 we have to make it 32-bit. 16-bit is preferred because 2677 ** it uses less memory in the Expr object, which is a big memory user 2678 ** in systems with lots of prepared statements. And few applications 2679 ** need more than about 10 or 20 variables. But some extreme users want 2680 ** to have prepared statements with over 32766 variables, and for them 2681 ** the option is available (at compile-time). 2682 */ 2683 #if SQLITE_MAX_VARIABLE_NUMBER<32767 2684 typedef i16 ynVar; 2685 #else 2686 typedef int ynVar; 2687 #endif 2688 2689 /* 2690 ** Each node of an expression in the parse tree is an instance 2691 ** of this structure. 2692 ** 2693 ** Expr.op is the opcode. The integer parser token codes are reused 2694 ** as opcodes here. For example, the parser defines TK_GE to be an integer 2695 ** code representing the ">=" operator. This same integer code is reused 2696 ** to represent the greater-than-or-equal-to operator in the expression 2697 ** tree. 2698 ** 2699 ** If the expression is an SQL literal (TK_INTEGER, TK_FLOAT, TK_BLOB, 2700 ** or TK_STRING), then Expr.u.zToken contains the text of the SQL literal. If 2701 ** the expression is a variable (TK_VARIABLE), then Expr.u.zToken contains the 2702 ** variable name. Finally, if the expression is an SQL function (TK_FUNCTION), 2703 ** then Expr.u.zToken contains the name of the function. 2704 ** 2705 ** Expr.pRight and Expr.pLeft are the left and right subexpressions of a 2706 ** binary operator. Either or both may be NULL. 2707 ** 2708 ** Expr.x.pList is a list of arguments if the expression is an SQL function, 2709 ** a CASE expression or an IN expression of the form "<lhs> IN (<y>, <z>...)". 2710 ** Expr.x.pSelect is used if the expression is a sub-select or an expression of 2711 ** the form "<lhs> IN (SELECT ...)". If the EP_xIsSelect bit is set in the 2712 ** Expr.flags mask, then Expr.x.pSelect is valid. Otherwise, Expr.x.pList is 2713 ** valid. 2714 ** 2715 ** An expression of the form ID or ID.ID refers to a column in a table. 2716 ** For such expressions, Expr.op is set to TK_COLUMN and Expr.iTable is 2717 ** the integer cursor number of a VDBE cursor pointing to that table and 2718 ** Expr.iColumn is the column number for the specific column. If the 2719 ** expression is used as a result in an aggregate SELECT, then the 2720 ** value is also stored in the Expr.iAgg column in the aggregate so that 2721 ** it can be accessed after all aggregates are computed. 2722 ** 2723 ** If the expression is an unbound variable marker (a question mark 2724 ** character '?' in the original SQL) then the Expr.iTable holds the index 2725 ** number for that variable. 2726 ** 2727 ** If the expression is a subquery then Expr.iColumn holds an integer 2728 ** register number containing the result of the subquery. If the 2729 ** subquery gives a constant result, then iTable is -1. If the subquery 2730 ** gives a different answer at different times during statement processing 2731 ** then iTable is the address of a subroutine that computes the subquery. 2732 ** 2733 ** If the Expr is of type OP_Column, and the table it is selecting from 2734 ** is a disk table or the "old.*" pseudo-table, then pTab points to the 2735 ** corresponding table definition. 2736 ** 2737 ** ALLOCATION NOTES: 2738 ** 2739 ** Expr objects can use a lot of memory space in database schema. To 2740 ** help reduce memory requirements, sometimes an Expr object will be 2741 ** truncated. And to reduce the number of memory allocations, sometimes 2742 ** two or more Expr objects will be stored in a single memory allocation, 2743 ** together with Expr.u.zToken strings. 2744 ** 2745 ** If the EP_Reduced and EP_TokenOnly flags are set when 2746 ** an Expr object is truncated. When EP_Reduced is set, then all 2747 ** the child Expr objects in the Expr.pLeft and Expr.pRight subtrees 2748 ** are contained within the same memory allocation. Note, however, that 2749 ** the subtrees in Expr.x.pList or Expr.x.pSelect are always separately 2750 ** allocated, regardless of whether or not EP_Reduced is set. 2751 */ 2752 struct Expr { 2753 u8 op; /* Operation performed by this node */ 2754 char affExpr; /* affinity, or RAISE type */ 2755 u8 op2; /* TK_REGISTER/TK_TRUTH: original value of Expr.op 2756 ** TK_COLUMN: the value of p5 for OP_Column 2757 ** TK_AGG_FUNCTION: nesting depth 2758 ** TK_FUNCTION: NC_SelfRef flag if needs OP_PureFunc */ 2759 #ifdef SQLITE_DEBUG 2760 u8 vvaFlags; /* Verification flags. */ 2761 #endif 2762 u32 flags; /* Various flags. EP_* See below */ 2763 union { 2764 char *zToken; /* Token value. Zero terminated and dequoted */ 2765 int iValue; /* Non-negative integer value if EP_IntValue */ 2766 } u; 2767 2768 /* If the EP_TokenOnly flag is set in the Expr.flags mask, then no 2769 ** space is allocated for the fields below this point. An attempt to 2770 ** access them will result in a segfault or malfunction. 2771 *********************************************************************/ 2772 2773 Expr *pLeft; /* Left subnode */ 2774 Expr *pRight; /* Right subnode */ 2775 union { 2776 ExprList *pList; /* op = IN, EXISTS, SELECT, CASE, FUNCTION, BETWEEN */ 2777 Select *pSelect; /* EP_xIsSelect and op = IN, EXISTS, SELECT */ 2778 } x; 2779 2780 /* If the EP_Reduced flag is set in the Expr.flags mask, then no 2781 ** space is allocated for the fields below this point. An attempt to 2782 ** access them will result in a segfault or malfunction. 2783 *********************************************************************/ 2784 2785 #if SQLITE_MAX_EXPR_DEPTH>0 2786 int nHeight; /* Height of the tree headed by this node */ 2787 #endif 2788 int iTable; /* TK_COLUMN: cursor number of table holding column 2789 ** TK_REGISTER: register number 2790 ** TK_TRIGGER: 1 -> new, 0 -> old 2791 ** EP_Unlikely: 134217728 times likelihood 2792 ** TK_IN: ephemerial table holding RHS 2793 ** TK_SELECT_COLUMN: Number of columns on the LHS 2794 ** TK_SELECT: 1st register of result vector */ 2795 ynVar iColumn; /* TK_COLUMN: column index. -1 for rowid. 2796 ** TK_VARIABLE: variable number (always >= 1). 2797 ** TK_SELECT_COLUMN: column of the result vector */ 2798 i16 iAgg; /* Which entry in pAggInfo->aCol[] or ->aFunc[] */ 2799 int iRightJoinTable; /* If EP_FromJoin, the right table of the join */ 2800 AggInfo *pAggInfo; /* Used by TK_AGG_COLUMN and TK_AGG_FUNCTION */ 2801 union { 2802 Table *pTab; /* TK_COLUMN: Table containing column. Can be NULL 2803 ** for a column of an index on an expression */ 2804 Window *pWin; /* EP_WinFunc: Window/Filter defn for a function */ 2805 struct { /* TK_IN, TK_SELECT, and TK_EXISTS */ 2806 int iAddr; /* Subroutine entry address */ 2807 int regReturn; /* Register used to hold return address */ 2808 } sub; 2809 } y; 2810 }; 2811 2812 /* The following are the meanings of bits in the Expr.flags field. 2813 ** Value restrictions: 2814 ** 2815 ** EP_Agg == NC_HasAgg == SF_HasAgg 2816 ** EP_Win == NC_HasWin 2817 */ 2818 #define EP_FromJoin 0x000001 /* Originates in ON/USING clause of outer join */ 2819 #define EP_Distinct 0x000002 /* Aggregate function with DISTINCT keyword */ 2820 #define EP_HasFunc 0x000004 /* Contains one or more functions of any kind */ 2821 #define EP_FixedCol 0x000008 /* TK_Column with a known fixed value */ 2822 #define EP_Agg 0x000010 /* Contains one or more aggregate functions */ 2823 #define EP_VarSelect 0x000020 /* pSelect is correlated, not constant */ 2824 #define EP_DblQuoted 0x000040 /* token.z was originally in "..." */ 2825 #define EP_InfixFunc 0x000080 /* True for an infix function: LIKE, GLOB, etc */ 2826 #define EP_Collate 0x000100 /* Tree contains a TK_COLLATE operator */ 2827 #define EP_Commuted 0x000200 /* Comparison operator has been commuted */ 2828 #define EP_IntValue 0x000400 /* Integer value contained in u.iValue */ 2829 #define EP_xIsSelect 0x000800 /* x.pSelect is valid (otherwise x.pList is) */ 2830 #define EP_Skip 0x001000 /* Operator does not contribute to affinity */ 2831 #define EP_Reduced 0x002000 /* Expr struct EXPR_REDUCEDSIZE bytes only */ 2832 #define EP_TokenOnly 0x004000 /* Expr struct EXPR_TOKENONLYSIZE bytes only */ 2833 #define EP_Win 0x008000 /* Contains window functions */ 2834 #define EP_MemToken 0x010000 /* Need to sqlite3DbFree() Expr.zToken */ 2835 #define EP_IfNullRow 0x020000 /* The TK_IF_NULL_ROW opcode */ 2836 #define EP_Unlikely 0x040000 /* unlikely() or likelihood() function */ 2837 #define EP_ConstFunc 0x080000 /* A SQLITE_FUNC_CONSTANT or _SLOCHNG function */ 2838 #define EP_CanBeNull 0x100000 /* Can be null despite NOT NULL constraint */ 2839 #define EP_Subquery 0x200000 /* Tree contains a TK_SELECT operator */ 2840 /* 0x400000 // Available */ 2841 #define EP_Leaf 0x800000 /* Expr.pLeft, .pRight, .u.pSelect all NULL */ 2842 #define EP_WinFunc 0x1000000 /* TK_FUNCTION with Expr.y.pWin set */ 2843 #define EP_Subrtn 0x2000000 /* Uses Expr.y.sub. TK_IN, _SELECT, or _EXISTS */ 2844 #define EP_Quoted 0x4000000 /* TK_ID was originally quoted */ 2845 #define EP_Static 0x8000000 /* Held in memory not obtained from malloc() */ 2846 #define EP_IsTrue 0x10000000 /* Always has boolean value of TRUE */ 2847 #define EP_IsFalse 0x20000000 /* Always has boolean value of FALSE */ 2848 #define EP_FromDDL 0x40000000 /* Originates from sqlite_schema */ 2849 /* 0x80000000 // Available */ 2850 2851 /* The EP_Propagate mask is a set of properties that automatically propagate 2852 ** upwards into parent nodes. 2853 */ 2854 #define EP_Propagate (EP_Collate|EP_Subquery|EP_HasFunc) 2855 2856 /* Macros can be used to test, set, or clear bits in the 2857 ** Expr.flags field. 2858 */ 2859 #define ExprHasProperty(E,P) (((E)->flags&(P))!=0) 2860 #define ExprHasAllProperty(E,P) (((E)->flags&(P))==(P)) 2861 #define ExprSetProperty(E,P) (E)->flags|=(P) 2862 #define ExprClearProperty(E,P) (E)->flags&=~(P) 2863 #define ExprAlwaysTrue(E) (((E)->flags&(EP_FromJoin|EP_IsTrue))==EP_IsTrue) 2864 #define ExprAlwaysFalse(E) (((E)->flags&(EP_FromJoin|EP_IsFalse))==EP_IsFalse) 2865 2866 /* Macros used to ensure that the correct members of unions are accessed 2867 ** in Expr. 2868 */ 2869 #define ExprUseUToken(E) (((E)->flags&EP_IntValue)==0) 2870 #define ExprUseUValue(E) (((E)->flags&EP_IntValue)!=0) 2871 #define ExprUseXList(E) (((E)->flags&EP_xIsSelect)==0) 2872 #define ExprUseXSelect(E) (((E)->flags&EP_xIsSelect)!=0) 2873 #define ExprUseYTab(E) (((E)->flags&(EP_WinFunc|EP_Subrtn))==0) 2874 #define ExprUseYWin(E) (((E)->flags&EP_WinFunc)!=0) 2875 #define ExprUseYSub(E) (((E)->flags&EP_Subrtn)!=0) 2876 2877 /* Flags for use with Expr.vvaFlags 2878 */ 2879 #define EP_NoReduce 0x01 /* Cannot EXPRDUP_REDUCE this Expr */ 2880 #define EP_Immutable 0x02 /* Do not change this Expr node */ 2881 2882 /* The ExprSetVVAProperty() macro is used for Verification, Validation, 2883 ** and Accreditation only. It works like ExprSetProperty() during VVA 2884 ** processes but is a no-op for delivery. 2885 */ 2886 #ifdef SQLITE_DEBUG 2887 # define ExprSetVVAProperty(E,P) (E)->vvaFlags|=(P) 2888 # define ExprHasVVAProperty(E,P) (((E)->vvaFlags&(P))!=0) 2889 # define ExprClearVVAProperties(E) (E)->vvaFlags = 0 2890 #else 2891 # define ExprSetVVAProperty(E,P) 2892 # define ExprHasVVAProperty(E,P) 0 2893 # define ExprClearVVAProperties(E) 2894 #endif 2895 2896 /* 2897 ** Macros to determine the number of bytes required by a normal Expr 2898 ** struct, an Expr struct with the EP_Reduced flag set in Expr.flags 2899 ** and an Expr struct with the EP_TokenOnly flag set. 2900 */ 2901 #define EXPR_FULLSIZE sizeof(Expr) /* Full size */ 2902 #define EXPR_REDUCEDSIZE offsetof(Expr,iTable) /* Common features */ 2903 #define EXPR_TOKENONLYSIZE offsetof(Expr,pLeft) /* Fewer features */ 2904 2905 /* 2906 ** Flags passed to the sqlite3ExprDup() function. See the header comment 2907 ** above sqlite3ExprDup() for details. 2908 */ 2909 #define EXPRDUP_REDUCE 0x0001 /* Used reduced-size Expr nodes */ 2910 2911 /* 2912 ** True if the expression passed as an argument was a function with 2913 ** an OVER() clause (a window function). 2914 */ 2915 #ifdef SQLITE_OMIT_WINDOWFUNC 2916 # define IsWindowFunc(p) 0 2917 #else 2918 # define IsWindowFunc(p) ( \ 2919 ExprHasProperty((p), EP_WinFunc) && p->y.pWin->eFrmType!=TK_FILTER \ 2920 ) 2921 #endif 2922 2923 /* 2924 ** A list of expressions. Each expression may optionally have a 2925 ** name. An expr/name combination can be used in several ways, such 2926 ** as the list of "expr AS ID" fields following a "SELECT" or in the 2927 ** list of "ID = expr" items in an UPDATE. A list of expressions can 2928 ** also be used as the argument to a function, in which case the a.zName 2929 ** field is not used. 2930 ** 2931 ** In order to try to keep memory usage down, the Expr.a.zEName field 2932 ** is used for multiple purposes: 2933 ** 2934 ** eEName Usage 2935 ** ---------- ------------------------- 2936 ** ENAME_NAME (1) the AS of result set column 2937 ** (2) COLUMN= of an UPDATE 2938 ** 2939 ** ENAME_TAB DB.TABLE.NAME used to resolve names 2940 ** of subqueries 2941 ** 2942 ** ENAME_SPAN Text of the original result set 2943 ** expression. 2944 */ 2945 struct ExprList { 2946 int nExpr; /* Number of expressions on the list */ 2947 int nAlloc; /* Number of a[] slots allocated */ 2948 struct ExprList_item { /* For each expression in the list */ 2949 Expr *pExpr; /* The parse tree for this expression */ 2950 char *zEName; /* Token associated with this expression */ 2951 u8 sortFlags; /* Mask of KEYINFO_ORDER_* flags */ 2952 unsigned eEName :2; /* Meaning of zEName */ 2953 unsigned done :1; /* A flag to indicate when processing is finished */ 2954 unsigned reusable :1; /* Constant expression is reusable */ 2955 unsigned bSorterRef :1; /* Defer evaluation until after sorting */ 2956 unsigned bNulls: 1; /* True if explicit "NULLS FIRST/LAST" */ 2957 union { 2958 struct { /* Used by any ExprList other than Parse.pConsExpr */ 2959 u16 iOrderByCol; /* For ORDER BY, column number in result set */ 2960 u16 iAlias; /* Index into Parse.aAlias[] for zName */ 2961 } x; 2962 int iConstExprReg; /* Register in which Expr value is cached. Used only 2963 ** by Parse.pConstExpr */ 2964 } u; 2965 } a[1]; /* One slot for each expression in the list */ 2966 }; 2967 2968 /* 2969 ** Allowed values for Expr.a.eEName 2970 */ 2971 #define ENAME_NAME 0 /* The AS clause of a result set */ 2972 #define ENAME_SPAN 1 /* Complete text of the result set expression */ 2973 #define ENAME_TAB 2 /* "DB.TABLE.NAME" for the result set */ 2974 2975 /* 2976 ** An instance of this structure can hold a simple list of identifiers, 2977 ** such as the list "a,b,c" in the following statements: 2978 ** 2979 ** INSERT INTO t(a,b,c) VALUES ...; 2980 ** CREATE INDEX idx ON t(a,b,c); 2981 ** CREATE TRIGGER trig BEFORE UPDATE ON t(a,b,c) ...; 2982 ** 2983 ** The IdList.a.idx field is used when the IdList represents the list of 2984 ** column names after a table name in an INSERT statement. In the statement 2985 ** 2986 ** INSERT INTO t(a,b,c) ... 2987 ** 2988 ** If "a" is the k-th column of table "t", then IdList.a[0].idx==k. 2989 */ 2990 struct IdList { 2991 struct IdList_item { 2992 char *zName; /* Name of the identifier */ 2993 int idx; /* Index in some Table.aCol[] of a column named zName */ 2994 } *a; 2995 int nId; /* Number of identifiers on the list */ 2996 }; 2997 2998 /* 2999 ** The SrcItem object represents a single term in the FROM clause of a query. 3000 ** The SrcList object is mostly an array of SrcItems. 3001 ** 3002 ** Union member validity: 3003 ** 3004 ** u1.zIndexedBy fg.isIndexedBy && !fg.isTabFunc 3005 ** u1.pFuncArg fg.isTabFunc && !fg.isIndexedBy 3006 ** u2.pIBIndex fg.isIndexedBy && !fg.isCte 3007 ** u2.pCteUse fg.isCte && !fg.isIndexedBy 3008 */ 3009 struct SrcItem { 3010 Schema *pSchema; /* Schema to which this item is fixed */ 3011 char *zDatabase; /* Name of database holding this table */ 3012 char *zName; /* Name of the table */ 3013 char *zAlias; /* The "B" part of a "A AS B" phrase. zName is the "A" */ 3014 Table *pTab; /* An SQL table corresponding to zName */ 3015 Select *pSelect; /* A SELECT statement used in place of a table name */ 3016 int addrFillSub; /* Address of subroutine to manifest a subquery */ 3017 int regReturn; /* Register holding return address of addrFillSub */ 3018 int regResult; /* Registers holding results of a co-routine */ 3019 struct { 3020 u8 jointype; /* Type of join between this table and the previous */ 3021 unsigned notIndexed :1; /* True if there is a NOT INDEXED clause */ 3022 unsigned isIndexedBy :1; /* True if there is an INDEXED BY clause */ 3023 unsigned isTabFunc :1; /* True if table-valued-function syntax */ 3024 unsigned isCorrelated :1; /* True if sub-query is correlated */ 3025 unsigned viaCoroutine :1; /* Implemented as a co-routine */ 3026 unsigned isRecursive :1; /* True for recursive reference in WITH */ 3027 unsigned fromDDL :1; /* Comes from sqlite_schema */ 3028 unsigned isCte :1; /* This is a CTE */ 3029 unsigned notCte :1; /* This item may not match a CTE */ 3030 } fg; 3031 int iCursor; /* The VDBE cursor number used to access this table */ 3032 Expr *pOn; /* The ON clause of a join */ 3033 IdList *pUsing; /* The USING clause of a join */ 3034 Bitmask colUsed; /* Bit N (1<<N) set if column N of pTab is used */ 3035 union { 3036 char *zIndexedBy; /* Identifier from "INDEXED BY <zIndex>" clause */ 3037 ExprList *pFuncArg; /* Arguments to table-valued-function */ 3038 } u1; 3039 union { 3040 Index *pIBIndex; /* Index structure corresponding to u1.zIndexedBy */ 3041 CteUse *pCteUse; /* CTE Usage info info fg.isCte is true */ 3042 } u2; 3043 }; 3044 3045 /* 3046 ** The following structure describes the FROM clause of a SELECT statement. 3047 ** Each table or subquery in the FROM clause is a separate element of 3048 ** the SrcList.a[] array. 3049 ** 3050 ** With the addition of multiple database support, the following structure 3051 ** can also be used to describe a particular table such as the table that 3052 ** is modified by an INSERT, DELETE, or UPDATE statement. In standard SQL, 3053 ** such a table must be a simple name: ID. But in SQLite, the table can 3054 ** now be identified by a database name, a dot, then the table name: ID.ID. 3055 ** 3056 ** The jointype starts out showing the join type between the current table 3057 ** and the next table on the list. The parser builds the list this way. 3058 ** But sqlite3SrcListShiftJoinType() later shifts the jointypes so that each 3059 ** jointype expresses the join between the table and the previous table. 3060 ** 3061 ** In the colUsed field, the high-order bit (bit 63) is set if the table 3062 ** contains more than 63 columns and the 64-th or later column is used. 3063 */ 3064 struct SrcList { 3065 int nSrc; /* Number of tables or subqueries in the FROM clause */ 3066 u32 nAlloc; /* Number of entries allocated in a[] below */ 3067 SrcItem a[1]; /* One entry for each identifier on the list */ 3068 }; 3069 3070 /* 3071 ** Permitted values of the SrcList.a.jointype field 3072 */ 3073 #define JT_INNER 0x0001 /* Any kind of inner or cross join */ 3074 #define JT_CROSS 0x0002 /* Explicit use of the CROSS keyword */ 3075 #define JT_NATURAL 0x0004 /* True for a "natural" join */ 3076 #define JT_LEFT 0x0008 /* Left outer join */ 3077 #define JT_RIGHT 0x0010 /* Right outer join */ 3078 #define JT_OUTER 0x0020 /* The "OUTER" keyword is present */ 3079 #define JT_ERROR 0x0040 /* unknown or unsupported join type */ 3080 3081 3082 /* 3083 ** Flags appropriate for the wctrlFlags parameter of sqlite3WhereBegin() 3084 ** and the WhereInfo.wctrlFlags member. 3085 ** 3086 ** Value constraints (enforced via assert()): 3087 ** WHERE_USE_LIMIT == SF_FixedLimit 3088 */ 3089 #define WHERE_ORDERBY_NORMAL 0x0000 /* No-op */ 3090 #define WHERE_ORDERBY_MIN 0x0001 /* ORDER BY processing for min() func */ 3091 #define WHERE_ORDERBY_MAX 0x0002 /* ORDER BY processing for max() func */ 3092 #define WHERE_ONEPASS_DESIRED 0x0004 /* Want to do one-pass UPDATE/DELETE */ 3093 #define WHERE_ONEPASS_MULTIROW 0x0008 /* ONEPASS is ok with multiple rows */ 3094 #define WHERE_DUPLICATES_OK 0x0010 /* Ok to return a row more than once */ 3095 #define WHERE_OR_SUBCLAUSE 0x0020 /* Processing a sub-WHERE as part of 3096 ** the OR optimization */ 3097 #define WHERE_GROUPBY 0x0040 /* pOrderBy is really a GROUP BY */ 3098 #define WHERE_DISTINCTBY 0x0080 /* pOrderby is really a DISTINCT clause */ 3099 #define WHERE_WANT_DISTINCT 0x0100 /* All output needs to be distinct */ 3100 #define WHERE_SORTBYGROUP 0x0200 /* Support sqlite3WhereIsSorted() */ 3101 #define WHERE_AGG_DISTINCT 0x0400 /* Query is "SELECT agg(DISTINCT ...)" */ 3102 #define WHERE_ORDERBY_LIMIT 0x0800 /* ORDERBY+LIMIT on the inner loop */ 3103 /* 0x1000 not currently used */ 3104 /* 0x2000 not currently used */ 3105 #define WHERE_USE_LIMIT 0x4000 /* Use the LIMIT in cost estimates */ 3106 /* 0x8000 not currently used */ 3107 3108 /* Allowed return values from sqlite3WhereIsDistinct() 3109 */ 3110 #define WHERE_DISTINCT_NOOP 0 /* DISTINCT keyword not used */ 3111 #define WHERE_DISTINCT_UNIQUE 1 /* No duplicates */ 3112 #define WHERE_DISTINCT_ORDERED 2 /* All duplicates are adjacent */ 3113 #define WHERE_DISTINCT_UNORDERED 3 /* Duplicates are scattered */ 3114 3115 /* 3116 ** A NameContext defines a context in which to resolve table and column 3117 ** names. The context consists of a list of tables (the pSrcList) field and 3118 ** a list of named expression (pEList). The named expression list may 3119 ** be NULL. The pSrc corresponds to the FROM clause of a SELECT or 3120 ** to the table being operated on by INSERT, UPDATE, or DELETE. The 3121 ** pEList corresponds to the result set of a SELECT and is NULL for 3122 ** other statements. 3123 ** 3124 ** NameContexts can be nested. When resolving names, the inner-most 3125 ** context is searched first. If no match is found, the next outer 3126 ** context is checked. If there is still no match, the next context 3127 ** is checked. This process continues until either a match is found 3128 ** or all contexts are check. When a match is found, the nRef member of 3129 ** the context containing the match is incremented. 3130 ** 3131 ** Each subquery gets a new NameContext. The pNext field points to the 3132 ** NameContext in the parent query. Thus the process of scanning the 3133 ** NameContext list corresponds to searching through successively outer 3134 ** subqueries looking for a match. 3135 */ 3136 struct NameContext { 3137 Parse *pParse; /* The parser */ 3138 SrcList *pSrcList; /* One or more tables used to resolve names */ 3139 union { 3140 ExprList *pEList; /* Optional list of result-set columns */ 3141 AggInfo *pAggInfo; /* Information about aggregates at this level */ 3142 Upsert *pUpsert; /* ON CONFLICT clause information from an upsert */ 3143 int iBaseReg; /* For TK_REGISTER when parsing RETURNING */ 3144 } uNC; 3145 NameContext *pNext; /* Next outer name context. NULL for outermost */ 3146 int nRef; /* Number of names resolved by this context */ 3147 int nNcErr; /* Number of errors encountered while resolving names */ 3148 int ncFlags; /* Zero or more NC_* flags defined below */ 3149 Select *pWinSelect; /* SELECT statement for any window functions */ 3150 }; 3151 3152 /* 3153 ** Allowed values for the NameContext, ncFlags field. 3154 ** 3155 ** Value constraints (all checked via assert()): 3156 ** NC_HasAgg == SF_HasAgg == EP_Agg 3157 ** NC_MinMaxAgg == SF_MinMaxAgg == SQLITE_FUNC_MINMAX 3158 ** NC_OrderAgg == SF_OrderByReqd == SQLITE_FUNC_ANYORDER 3159 ** NC_HasWin == EP_Win 3160 ** 3161 */ 3162 #define NC_AllowAgg 0x000001 /* Aggregate functions are allowed here */ 3163 #define NC_PartIdx 0x000002 /* True if resolving a partial index WHERE */ 3164 #define NC_IsCheck 0x000004 /* True if resolving a CHECK constraint */ 3165 #define NC_GenCol 0x000008 /* True for a GENERATED ALWAYS AS clause */ 3166 #define NC_HasAgg 0x000010 /* One or more aggregate functions seen */ 3167 #define NC_IdxExpr 0x000020 /* True if resolving columns of CREATE INDEX */ 3168 #define NC_SelfRef 0x00002e /* Combo: PartIdx, isCheck, GenCol, and IdxExpr */ 3169 #define NC_VarSelect 0x000040 /* A correlated subquery has been seen */ 3170 #define NC_UEList 0x000080 /* True if uNC.pEList is used */ 3171 #define NC_UAggInfo 0x000100 /* True if uNC.pAggInfo is used */ 3172 #define NC_UUpsert 0x000200 /* True if uNC.pUpsert is used */ 3173 #define NC_UBaseReg 0x000400 /* True if uNC.iBaseReg is used */ 3174 #define NC_MinMaxAgg 0x001000 /* min/max aggregates seen. See note above */ 3175 #define NC_Complex 0x002000 /* True if a function or subquery seen */ 3176 #define NC_AllowWin 0x004000 /* Window functions are allowed here */ 3177 #define NC_HasWin 0x008000 /* One or more window functions seen */ 3178 #define NC_IsDDL 0x010000 /* Resolving names in a CREATE statement */ 3179 #define NC_InAggFunc 0x020000 /* True if analyzing arguments to an agg func */ 3180 #define NC_FromDDL 0x040000 /* SQL text comes from sqlite_schema */ 3181 #define NC_NoSelect 0x080000 /* Do not descend into sub-selects */ 3182 #define NC_OrderAgg 0x8000000 /* Has an aggregate other than count/min/max */ 3183 3184 /* 3185 ** An instance of the following object describes a single ON CONFLICT 3186 ** clause in an upsert. 3187 ** 3188 ** The pUpsertTarget field is only set if the ON CONFLICT clause includes 3189 ** conflict-target clause. (In "ON CONFLICT(a,b)" the "(a,b)" is the 3190 ** conflict-target clause.) The pUpsertTargetWhere is the optional 3191 ** WHERE clause used to identify partial unique indexes. 3192 ** 3193 ** pUpsertSet is the list of column=expr terms of the UPDATE statement. 3194 ** The pUpsertSet field is NULL for a ON CONFLICT DO NOTHING. The 3195 ** pUpsertWhere is the WHERE clause for the UPDATE and is NULL if the 3196 ** WHERE clause is omitted. 3197 */ 3198 struct Upsert { 3199 ExprList *pUpsertTarget; /* Optional description of conflict target */ 3200 Expr *pUpsertTargetWhere; /* WHERE clause for partial index targets */ 3201 ExprList *pUpsertSet; /* The SET clause from an ON CONFLICT UPDATE */ 3202 Expr *pUpsertWhere; /* WHERE clause for the ON CONFLICT UPDATE */ 3203 Upsert *pNextUpsert; /* Next ON CONFLICT clause in the list */ 3204 u8 isDoUpdate; /* True for DO UPDATE. False for DO NOTHING */ 3205 /* Above this point is the parse tree for the ON CONFLICT clauses. 3206 ** The next group of fields stores intermediate data. */ 3207 void *pToFree; /* Free memory when deleting the Upsert object */ 3208 /* All fields above are owned by the Upsert object and must be freed 3209 ** when the Upsert is destroyed. The fields below are used to transfer 3210 ** information from the INSERT processing down into the UPDATE processing 3211 ** while generating code. The fields below are owned by the INSERT 3212 ** statement and will be freed by INSERT processing. */ 3213 Index *pUpsertIdx; /* UNIQUE constraint specified by pUpsertTarget */ 3214 SrcList *pUpsertSrc; /* Table to be updated */ 3215 int regData; /* First register holding array of VALUES */ 3216 int iDataCur; /* Index of the data cursor */ 3217 int iIdxCur; /* Index of the first index cursor */ 3218 }; 3219 3220 /* 3221 ** An instance of the following structure contains all information 3222 ** needed to generate code for a single SELECT statement. 3223 ** 3224 ** See the header comment on the computeLimitRegisters() routine for a 3225 ** detailed description of the meaning of the iLimit and iOffset fields. 3226 ** 3227 ** addrOpenEphm[] entries contain the address of OP_OpenEphemeral opcodes. 3228 ** These addresses must be stored so that we can go back and fill in 3229 ** the P4_KEYINFO and P2 parameters later. Neither the KeyInfo nor 3230 ** the number of columns in P2 can be computed at the same time 3231 ** as the OP_OpenEphm instruction is coded because not 3232 ** enough information about the compound query is known at that point. 3233 ** The KeyInfo for addrOpenTran[0] and [1] contains collating sequences 3234 ** for the result set. The KeyInfo for addrOpenEphm[2] contains collating 3235 ** sequences for the ORDER BY clause. 3236 */ 3237 struct Select { 3238 u8 op; /* One of: TK_UNION TK_ALL TK_INTERSECT TK_EXCEPT */ 3239 LogEst nSelectRow; /* Estimated number of result rows */ 3240 u32 selFlags; /* Various SF_* values */ 3241 int iLimit, iOffset; /* Memory registers holding LIMIT & OFFSET counters */ 3242 u32 selId; /* Unique identifier number for this SELECT */ 3243 int addrOpenEphm[2]; /* OP_OpenEphem opcodes related to this select */ 3244 ExprList *pEList; /* The fields of the result */ 3245 SrcList *pSrc; /* The FROM clause */ 3246 Expr *pWhere; /* The WHERE clause */ 3247 ExprList *pGroupBy; /* The GROUP BY clause */ 3248 Expr *pHaving; /* The HAVING clause */ 3249 ExprList *pOrderBy; /* The ORDER BY clause */ 3250 Select *pPrior; /* Prior select in a compound select statement */ 3251 Select *pNext; /* Next select to the left in a compound */ 3252 Expr *pLimit; /* LIMIT expression. NULL means not used. */ 3253 With *pWith; /* WITH clause attached to this select. Or NULL. */ 3254 #ifndef SQLITE_OMIT_WINDOWFUNC 3255 Window *pWin; /* List of window functions */ 3256 Window *pWinDefn; /* List of named window definitions */ 3257 #endif 3258 }; 3259 3260 /* 3261 ** Allowed values for Select.selFlags. The "SF" prefix stands for 3262 ** "Select Flag". 3263 ** 3264 ** Value constraints (all checked via assert()) 3265 ** SF_HasAgg == NC_HasAgg 3266 ** SF_MinMaxAgg == NC_MinMaxAgg == SQLITE_FUNC_MINMAX 3267 ** SF_OrderByReqd == NC_OrderAgg == SQLITE_FUNC_ANYORDER 3268 ** SF_FixedLimit == WHERE_USE_LIMIT 3269 */ 3270 #define SF_Distinct 0x0000001 /* Output should be DISTINCT */ 3271 #define SF_All 0x0000002 /* Includes the ALL keyword */ 3272 #define SF_Resolved 0x0000004 /* Identifiers have been resolved */ 3273 #define SF_Aggregate 0x0000008 /* Contains agg functions or a GROUP BY */ 3274 #define SF_HasAgg 0x0000010 /* Contains aggregate functions */ 3275 #define SF_UsesEphemeral 0x0000020 /* Uses the OpenEphemeral opcode */ 3276 #define SF_Expanded 0x0000040 /* sqlite3SelectExpand() called on this */ 3277 #define SF_HasTypeInfo 0x0000080 /* FROM subqueries have Table metadata */ 3278 #define SF_Compound 0x0000100 /* Part of a compound query */ 3279 #define SF_Values 0x0000200 /* Synthesized from VALUES clause */ 3280 #define SF_MultiValue 0x0000400 /* Single VALUES term with multiple rows */ 3281 #define SF_NestedFrom 0x0000800 /* Part of a parenthesized FROM clause */ 3282 #define SF_MinMaxAgg 0x0001000 /* Aggregate containing min() or max() */ 3283 #define SF_Recursive 0x0002000 /* The recursive part of a recursive CTE */ 3284 #define SF_FixedLimit 0x0004000 /* nSelectRow set by a constant LIMIT */ 3285 #define SF_MaybeConvert 0x0008000 /* Need convertCompoundSelectToSubquery() */ 3286 #define SF_Converted 0x0010000 /* By convertCompoundSelectToSubquery() */ 3287 #define SF_IncludeHidden 0x0020000 /* Include hidden columns in output */ 3288 #define SF_ComplexResult 0x0040000 /* Result contains subquery or function */ 3289 #define SF_WhereBegin 0x0080000 /* Really a WhereBegin() call. Debug Only */ 3290 #define SF_WinRewrite 0x0100000 /* Window function rewrite accomplished */ 3291 #define SF_View 0x0200000 /* SELECT statement is a view */ 3292 #define SF_NoopOrderBy 0x0400000 /* ORDER BY is ignored for this query */ 3293 #define SF_UFSrcCheck 0x0800000 /* Check pSrc as required by UPDATE...FROM */ 3294 #define SF_PushDown 0x1000000 /* SELECT has be modified by push-down opt */ 3295 #define SF_MultiPart 0x2000000 /* Has multiple incompatible PARTITIONs */ 3296 #define SF_CopyCte 0x4000000 /* SELECT statement is a copy of a CTE */ 3297 #define SF_OrderByReqd 0x8000000 /* The ORDER BY clause may not be omitted */ 3298 3299 /* 3300 ** The results of a SELECT can be distributed in several ways, as defined 3301 ** by one of the following macros. The "SRT" prefix means "SELECT Result 3302 ** Type". 3303 ** 3304 ** SRT_Union Store results as a key in a temporary index 3305 ** identified by pDest->iSDParm. 3306 ** 3307 ** SRT_Except Remove results from the temporary index pDest->iSDParm. 3308 ** 3309 ** SRT_Exists Store a 1 in memory cell pDest->iSDParm if the result 3310 ** set is not empty. 3311 ** 3312 ** SRT_Discard Throw the results away. This is used by SELECT 3313 ** statements within triggers whose only purpose is 3314 ** the side-effects of functions. 3315 ** 3316 ** SRT_Output Generate a row of output (using the OP_ResultRow 3317 ** opcode) for each row in the result set. 3318 ** 3319 ** SRT_Mem Only valid if the result is a single column. 3320 ** Store the first column of the first result row 3321 ** in register pDest->iSDParm then abandon the rest 3322 ** of the query. This destination implies "LIMIT 1". 3323 ** 3324 ** SRT_Set The result must be a single column. Store each 3325 ** row of result as the key in table pDest->iSDParm. 3326 ** Apply the affinity pDest->affSdst before storing 3327 ** results. Used to implement "IN (SELECT ...)". 3328 ** 3329 ** SRT_EphemTab Create an temporary table pDest->iSDParm and store 3330 ** the result there. The cursor is left open after 3331 ** returning. This is like SRT_Table except that 3332 ** this destination uses OP_OpenEphemeral to create 3333 ** the table first. 3334 ** 3335 ** SRT_Coroutine Generate a co-routine that returns a new row of 3336 ** results each time it is invoked. The entry point 3337 ** of the co-routine is stored in register pDest->iSDParm 3338 ** and the result row is stored in pDest->nDest registers 3339 ** starting with pDest->iSdst. 3340 ** 3341 ** SRT_Table Store results in temporary table pDest->iSDParm. 3342 ** SRT_Fifo This is like SRT_EphemTab except that the table 3343 ** is assumed to already be open. SRT_Fifo has 3344 ** the additional property of being able to ignore 3345 ** the ORDER BY clause. 3346 ** 3347 ** SRT_DistFifo Store results in a temporary table pDest->iSDParm. 3348 ** But also use temporary table pDest->iSDParm+1 as 3349 ** a record of all prior results and ignore any duplicate 3350 ** rows. Name means: "Distinct Fifo". 3351 ** 3352 ** SRT_Queue Store results in priority queue pDest->iSDParm (really 3353 ** an index). Append a sequence number so that all entries 3354 ** are distinct. 3355 ** 3356 ** SRT_DistQueue Store results in priority queue pDest->iSDParm only if 3357 ** the same record has never been stored before. The 3358 ** index at pDest->iSDParm+1 hold all prior stores. 3359 ** 3360 ** SRT_Upfrom Store results in the temporary table already opened by 3361 ** pDest->iSDParm. If (pDest->iSDParm<0), then the temp 3362 ** table is an intkey table - in this case the first 3363 ** column returned by the SELECT is used as the integer 3364 ** key. If (pDest->iSDParm>0), then the table is an index 3365 ** table. (pDest->iSDParm) is the number of key columns in 3366 ** each index record in this case. 3367 */ 3368 #define SRT_Union 1 /* Store result as keys in an index */ 3369 #define SRT_Except 2 /* Remove result from a UNION index */ 3370 #define SRT_Exists 3 /* Store 1 if the result is not empty */ 3371 #define SRT_Discard 4 /* Do not save the results anywhere */ 3372 #define SRT_DistFifo 5 /* Like SRT_Fifo, but unique results only */ 3373 #define SRT_DistQueue 6 /* Like SRT_Queue, but unique results only */ 3374 3375 /* The DISTINCT clause is ignored for all of the above. Not that 3376 ** IgnorableDistinct() implies IgnorableOrderby() */ 3377 #define IgnorableDistinct(X) ((X->eDest)<=SRT_DistQueue) 3378 3379 #define SRT_Queue 7 /* Store result in an queue */ 3380 #define SRT_Fifo 8 /* Store result as data with an automatic rowid */ 3381 3382 /* The ORDER BY clause is ignored for all of the above */ 3383 #define IgnorableOrderby(X) ((X->eDest)<=SRT_Fifo) 3384 3385 #define SRT_Output 9 /* Output each row of result */ 3386 #define SRT_Mem 10 /* Store result in a memory cell */ 3387 #define SRT_Set 11 /* Store results as keys in an index */ 3388 #define SRT_EphemTab 12 /* Create transient tab and store like SRT_Table */ 3389 #define SRT_Coroutine 13 /* Generate a single row of result */ 3390 #define SRT_Table 14 /* Store result as data with an automatic rowid */ 3391 #define SRT_Upfrom 15 /* Store result as data with rowid */ 3392 3393 /* 3394 ** An instance of this object describes where to put of the results of 3395 ** a SELECT statement. 3396 */ 3397 struct SelectDest { 3398 u8 eDest; /* How to dispose of the results. One of SRT_* above. */ 3399 int iSDParm; /* A parameter used by the eDest disposal method */ 3400 int iSDParm2; /* A second parameter for the eDest disposal method */ 3401 int iSdst; /* Base register where results are written */ 3402 int nSdst; /* Number of registers allocated */ 3403 char *zAffSdst; /* Affinity used when eDest==SRT_Set */ 3404 ExprList *pOrderBy; /* Key columns for SRT_Queue and SRT_DistQueue */ 3405 }; 3406 3407 /* 3408 ** During code generation of statements that do inserts into AUTOINCREMENT 3409 ** tables, the following information is attached to the Table.u.autoInc.p 3410 ** pointer of each autoincrement table to record some side information that 3411 ** the code generator needs. We have to keep per-table autoincrement 3412 ** information in case inserts are done within triggers. Triggers do not 3413 ** normally coordinate their activities, but we do need to coordinate the 3414 ** loading and saving of autoincrement information. 3415 */ 3416 struct AutoincInfo { 3417 AutoincInfo *pNext; /* Next info block in a list of them all */ 3418 Table *pTab; /* Table this info block refers to */ 3419 int iDb; /* Index in sqlite3.aDb[] of database holding pTab */ 3420 int regCtr; /* Memory register holding the rowid counter */ 3421 }; 3422 3423 /* 3424 ** At least one instance of the following structure is created for each 3425 ** trigger that may be fired while parsing an INSERT, UPDATE or DELETE 3426 ** statement. All such objects are stored in the linked list headed at 3427 ** Parse.pTriggerPrg and deleted once statement compilation has been 3428 ** completed. 3429 ** 3430 ** A Vdbe sub-program that implements the body and WHEN clause of trigger 3431 ** TriggerPrg.pTrigger, assuming a default ON CONFLICT clause of 3432 ** TriggerPrg.orconf, is stored in the TriggerPrg.pProgram variable. 3433 ** The Parse.pTriggerPrg list never contains two entries with the same 3434 ** values for both pTrigger and orconf. 3435 ** 3436 ** The TriggerPrg.aColmask[0] variable is set to a mask of old.* columns 3437 ** accessed (or set to 0 for triggers fired as a result of INSERT 3438 ** statements). Similarly, the TriggerPrg.aColmask[1] variable is set to 3439 ** a mask of new.* columns used by the program. 3440 */ 3441 struct TriggerPrg { 3442 Trigger *pTrigger; /* Trigger this program was coded from */ 3443 TriggerPrg *pNext; /* Next entry in Parse.pTriggerPrg list */ 3444 SubProgram *pProgram; /* Program implementing pTrigger/orconf */ 3445 int orconf; /* Default ON CONFLICT policy */ 3446 u32 aColmask[2]; /* Masks of old.*, new.* columns accessed */ 3447 }; 3448 3449 /* 3450 ** The yDbMask datatype for the bitmask of all attached databases. 3451 */ 3452 #if SQLITE_MAX_ATTACHED>30 3453 typedef unsigned char yDbMask[(SQLITE_MAX_ATTACHED+9)/8]; 3454 # define DbMaskTest(M,I) (((M)[(I)/8]&(1<<((I)&7)))!=0) 3455 # define DbMaskZero(M) memset((M),0,sizeof(M)) 3456 # define DbMaskSet(M,I) (M)[(I)/8]|=(1<<((I)&7)) 3457 # define DbMaskAllZero(M) sqlite3DbMaskAllZero(M) 3458 # define DbMaskNonZero(M) (sqlite3DbMaskAllZero(M)==0) 3459 #else 3460 typedef unsigned int yDbMask; 3461 # define DbMaskTest(M,I) (((M)&(((yDbMask)1)<<(I)))!=0) 3462 # define DbMaskZero(M) (M)=0 3463 # define DbMaskSet(M,I) (M)|=(((yDbMask)1)<<(I)) 3464 # define DbMaskAllZero(M) (M)==0 3465 # define DbMaskNonZero(M) (M)!=0 3466 #endif 3467 3468 /* 3469 ** An instance of the ParseCleanup object specifies an operation that 3470 ** should be performed after parsing to deallocation resources obtained 3471 ** during the parse and which are no longer needed. 3472 */ 3473 struct ParseCleanup { 3474 ParseCleanup *pNext; /* Next cleanup task */ 3475 void *pPtr; /* Pointer to object to deallocate */ 3476 void (*xCleanup)(sqlite3*,void*); /* Deallocation routine */ 3477 }; 3478 3479 /* 3480 ** An SQL parser context. A copy of this structure is passed through 3481 ** the parser and down into all the parser action routine in order to 3482 ** carry around information that is global to the entire parse. 3483 ** 3484 ** The structure is divided into two parts. When the parser and code 3485 ** generate call themselves recursively, the first part of the structure 3486 ** is constant but the second part is reset at the beginning and end of 3487 ** each recursion. 3488 ** 3489 ** The nTableLock and aTableLock variables are only used if the shared-cache 3490 ** feature is enabled (if sqlite3Tsd()->useSharedData is true). They are 3491 ** used to store the set of table-locks required by the statement being 3492 ** compiled. Function sqlite3TableLock() is used to add entries to the 3493 ** list. 3494 */ 3495 struct Parse { 3496 sqlite3 *db; /* The main database structure */ 3497 char *zErrMsg; /* An error message */ 3498 Vdbe *pVdbe; /* An engine for executing database bytecode */ 3499 int rc; /* Return code from execution */ 3500 u8 colNamesSet; /* TRUE after OP_ColumnName has been issued to pVdbe */ 3501 u8 checkSchema; /* Causes schema cookie check after an error */ 3502 u8 nested; /* Number of nested calls to the parser/code generator */ 3503 u8 nTempReg; /* Number of temporary registers in aTempReg[] */ 3504 u8 isMultiWrite; /* True if statement may modify/insert multiple rows */ 3505 u8 mayAbort; /* True if statement may throw an ABORT exception */ 3506 u8 hasCompound; /* Need to invoke convertCompoundSelectToSubquery() */ 3507 u8 okConstFactor; /* OK to factor out constants */ 3508 u8 disableLookaside; /* Number of times lookaside has been disabled */ 3509 u8 disableVtab; /* Disable all virtual tables for this parse */ 3510 #if defined(SQLITE_DEBUG) || defined(SQLITE_COVERAGE_TEST) 3511 u8 earlyCleanup; /* OOM inside sqlite3ParserAddCleanup() */ 3512 #endif 3513 int nRangeReg; /* Size of the temporary register block */ 3514 int iRangeReg; /* First register in temporary register block */ 3515 int nErr; /* Number of errors seen */ 3516 int nTab; /* Number of previously allocated VDBE cursors */ 3517 int nMem; /* Number of memory cells used so far */ 3518 int szOpAlloc; /* Bytes of memory space allocated for Vdbe.aOp[] */ 3519 int iSelfTab; /* Table associated with an index on expr, or negative 3520 ** of the base register during check-constraint eval */ 3521 int nLabel; /* The *negative* of the number of labels used */ 3522 int nLabelAlloc; /* Number of slots in aLabel */ 3523 int *aLabel; /* Space to hold the labels */ 3524 ExprList *pConstExpr;/* Constant expressions */ 3525 Token constraintName;/* Name of the constraint currently being parsed */ 3526 yDbMask writeMask; /* Start a write transaction on these databases */ 3527 yDbMask cookieMask; /* Bitmask of schema verified databases */ 3528 int regRowid; /* Register holding rowid of CREATE TABLE entry */ 3529 int regRoot; /* Register holding root page number for new objects */ 3530 int nMaxArg; /* Max args passed to user function by sub-program */ 3531 int nSelect; /* Number of SELECT stmts. Counter for Select.selId */ 3532 #ifndef SQLITE_OMIT_SHARED_CACHE 3533 int nTableLock; /* Number of locks in aTableLock */ 3534 TableLock *aTableLock; /* Required table locks for shared-cache mode */ 3535 #endif 3536 AutoincInfo *pAinc; /* Information about AUTOINCREMENT counters */ 3537 Parse *pToplevel; /* Parse structure for main program (or NULL) */ 3538 Table *pTriggerTab; /* Table triggers are being coded for */ 3539 Parse *pParentParse; /* Parent parser if this parser is nested */ 3540 union { 3541 int addrCrTab; /* Address of OP_CreateBtree on CREATE TABLE */ 3542 Returning *pReturning; /* The RETURNING clause */ 3543 } u1; 3544 u32 nQueryLoop; /* Est number of iterations of a query (10*log2(N)) */ 3545 u32 oldmask; /* Mask of old.* columns referenced */ 3546 u32 newmask; /* Mask of new.* columns referenced */ 3547 u8 eTriggerOp; /* TK_UPDATE, TK_INSERT or TK_DELETE */ 3548 u8 bReturning; /* Coding a RETURNING trigger */ 3549 u8 eOrconf; /* Default ON CONFLICT policy for trigger steps */ 3550 u8 disableTriggers; /* True to disable triggers */ 3551 3552 /************************************************************************** 3553 ** Fields above must be initialized to zero. The fields that follow, 3554 ** down to the beginning of the recursive section, do not need to be 3555 ** initialized as they will be set before being used. The boundary is 3556 ** determined by offsetof(Parse,aTempReg). 3557 **************************************************************************/ 3558 3559 int aTempReg[8]; /* Holding area for temporary registers */ 3560 Token sNameToken; /* Token with unqualified schema object name */ 3561 3562 /************************************************************************ 3563 ** Above is constant between recursions. Below is reset before and after 3564 ** each recursion. The boundary between these two regions is determined 3565 ** using offsetof(Parse,sLastToken) so the sLastToken field must be the 3566 ** first field in the recursive region. 3567 ************************************************************************/ 3568 3569 Token sLastToken; /* The last token parsed */ 3570 ynVar nVar; /* Number of '?' variables seen in the SQL so far */ 3571 u8 iPkSortOrder; /* ASC or DESC for INTEGER PRIMARY KEY */ 3572 u8 explain; /* True if the EXPLAIN flag is found on the query */ 3573 u8 eParseMode; /* PARSE_MODE_XXX constant */ 3574 #ifndef SQLITE_OMIT_VIRTUALTABLE 3575 int nVtabLock; /* Number of virtual tables to lock */ 3576 #endif 3577 int nHeight; /* Expression tree height of current sub-select */ 3578 #ifndef SQLITE_OMIT_EXPLAIN 3579 int addrExplain; /* Address of current OP_Explain opcode */ 3580 #endif 3581 VList *pVList; /* Mapping between variable names and numbers */ 3582 Vdbe *pReprepare; /* VM being reprepared (sqlite3Reprepare()) */ 3583 const char *zTail; /* All SQL text past the last semicolon parsed */ 3584 Table *pNewTable; /* A table being constructed by CREATE TABLE */ 3585 Index *pNewIndex; /* An index being constructed by CREATE INDEX. 3586 ** Also used to hold redundant UNIQUE constraints 3587 ** during a RENAME COLUMN */ 3588 Trigger *pNewTrigger; /* Trigger under construct by a CREATE TRIGGER */ 3589 const char *zAuthContext; /* The 6th parameter to db->xAuth callbacks */ 3590 #ifndef SQLITE_OMIT_VIRTUALTABLE 3591 Token sArg; /* Complete text of a module argument */ 3592 Table **apVtabLock; /* Pointer to virtual tables needing locking */ 3593 #endif 3594 TriggerPrg *pTriggerPrg; /* Linked list of coded triggers */ 3595 With *pWith; /* Current WITH clause, or NULL */ 3596 ParseCleanup *pCleanup; /* List of cleanup operations to run after parse */ 3597 #ifndef SQLITE_OMIT_ALTERTABLE 3598 RenameToken *pRename; /* Tokens subject to renaming by ALTER TABLE */ 3599 #endif 3600 }; 3601 3602 /* Allowed values for Parse.eParseMode 3603 */ 3604 #define PARSE_MODE_NORMAL 0 3605 #define PARSE_MODE_DECLARE_VTAB 1 3606 #define PARSE_MODE_RENAME 2 3607 #define PARSE_MODE_UNMAP 3 3608 3609 /* 3610 ** Sizes and pointers of various parts of the Parse object. 3611 */ 3612 #define PARSE_HDR_SZ offsetof(Parse,aTempReg) /* Recursive part w/o aColCache*/ 3613 #define PARSE_RECURSE_SZ offsetof(Parse,sLastToken) /* Recursive part */ 3614 #define PARSE_TAIL_SZ (sizeof(Parse)-PARSE_RECURSE_SZ) /* Non-recursive part */ 3615 #define PARSE_TAIL(X) (((char*)(X))+PARSE_RECURSE_SZ) /* Pointer to tail */ 3616 3617 /* 3618 ** Return true if currently inside an sqlite3_declare_vtab() call. 3619 */ 3620 #ifdef SQLITE_OMIT_VIRTUALTABLE 3621 #define IN_DECLARE_VTAB 0 3622 #else 3623 #define IN_DECLARE_VTAB (pParse->eParseMode==PARSE_MODE_DECLARE_VTAB) 3624 #endif 3625 3626 #if defined(SQLITE_OMIT_ALTERTABLE) 3627 #define IN_RENAME_OBJECT 0 3628 #else 3629 #define IN_RENAME_OBJECT (pParse->eParseMode>=PARSE_MODE_RENAME) 3630 #endif 3631 3632 #if defined(SQLITE_OMIT_VIRTUALTABLE) && defined(SQLITE_OMIT_ALTERTABLE) 3633 #define IN_SPECIAL_PARSE 0 3634 #else 3635 #define IN_SPECIAL_PARSE (pParse->eParseMode!=PARSE_MODE_NORMAL) 3636 #endif 3637 3638 /* 3639 ** An instance of the following structure can be declared on a stack and used 3640 ** to save the Parse.zAuthContext value so that it can be restored later. 3641 */ 3642 struct AuthContext { 3643 const char *zAuthContext; /* Put saved Parse.zAuthContext here */ 3644 Parse *pParse; /* The Parse structure */ 3645 }; 3646 3647 /* 3648 ** Bitfield flags for P5 value in various opcodes. 3649 ** 3650 ** Value constraints (enforced via assert()): 3651 ** OPFLAG_LENGTHARG == SQLITE_FUNC_LENGTH 3652 ** OPFLAG_TYPEOFARG == SQLITE_FUNC_TYPEOF 3653 ** OPFLAG_BULKCSR == BTREE_BULKLOAD 3654 ** OPFLAG_SEEKEQ == BTREE_SEEK_EQ 3655 ** OPFLAG_FORDELETE == BTREE_FORDELETE 3656 ** OPFLAG_SAVEPOSITION == BTREE_SAVEPOSITION 3657 ** OPFLAG_AUXDELETE == BTREE_AUXDELETE 3658 */ 3659 #define OPFLAG_NCHANGE 0x01 /* OP_Insert: Set to update db->nChange */ 3660 /* Also used in P2 (not P5) of OP_Delete */ 3661 #define OPFLAG_NOCHNG 0x01 /* OP_VColumn nochange for UPDATE */ 3662 #define OPFLAG_EPHEM 0x01 /* OP_Column: Ephemeral output is ok */ 3663 #define OPFLAG_LASTROWID 0x20 /* Set to update db->lastRowid */ 3664 #define OPFLAG_ISUPDATE 0x04 /* This OP_Insert is an sql UPDATE */ 3665 #define OPFLAG_APPEND 0x08 /* This is likely to be an append */ 3666 #define OPFLAG_USESEEKRESULT 0x10 /* Try to avoid a seek in BtreeInsert() */ 3667 #define OPFLAG_ISNOOP 0x40 /* OP_Delete does pre-update-hook only */ 3668 #define OPFLAG_LENGTHARG 0x40 /* OP_Column only used for length() */ 3669 #define OPFLAG_TYPEOFARG 0x80 /* OP_Column only used for typeof() */ 3670 #define OPFLAG_BULKCSR 0x01 /* OP_Open** used to open bulk cursor */ 3671 #define OPFLAG_SEEKEQ 0x02 /* OP_Open** cursor uses EQ seek only */ 3672 #define OPFLAG_FORDELETE 0x08 /* OP_Open should use BTREE_FORDELETE */ 3673 #define OPFLAG_P2ISREG 0x10 /* P2 to OP_Open** is a register number */ 3674 #define OPFLAG_PERMUTE 0x01 /* OP_Compare: use the permutation */ 3675 #define OPFLAG_SAVEPOSITION 0x02 /* OP_Delete/Insert: save cursor pos */ 3676 #define OPFLAG_AUXDELETE 0x04 /* OP_Delete: index in a DELETE op */ 3677 #define OPFLAG_NOCHNG_MAGIC 0x6d /* OP_MakeRecord: serialtype 10 is ok */ 3678 #define OPFLAG_PREFORMAT 0x80 /* OP_Insert uses preformatted cell */ 3679 3680 /* 3681 * Each trigger present in the database schema is stored as an instance of 3682 * struct Trigger. 3683 * 3684 * Pointers to instances of struct Trigger are stored in two ways. 3685 * 1. In the "trigHash" hash table (part of the sqlite3* that represents the 3686 * database). This allows Trigger structures to be retrieved by name. 3687 * 2. All triggers associated with a single table form a linked list, using the 3688 * pNext member of struct Trigger. A pointer to the first element of the 3689 * linked list is stored as the "pTrigger" member of the associated 3690 * struct Table. 3691 * 3692 * The "step_list" member points to the first element of a linked list 3693 * containing the SQL statements specified as the trigger program. 3694 */ 3695 struct Trigger { 3696 char *zName; /* The name of the trigger */ 3697 char *table; /* The table or view to which the trigger applies */ 3698 u8 op; /* One of TK_DELETE, TK_UPDATE, TK_INSERT */ 3699 u8 tr_tm; /* One of TRIGGER_BEFORE, TRIGGER_AFTER */ 3700 u8 bReturning; /* This trigger implements a RETURNING clause */ 3701 Expr *pWhen; /* The WHEN clause of the expression (may be NULL) */ 3702 IdList *pColumns; /* If this is an UPDATE OF <column-list> trigger, 3703 the <column-list> is stored here */ 3704 Schema *pSchema; /* Schema containing the trigger */ 3705 Schema *pTabSchema; /* Schema containing the table */ 3706 TriggerStep *step_list; /* Link list of trigger program steps */ 3707 Trigger *pNext; /* Next trigger associated with the table */ 3708 }; 3709 3710 /* 3711 ** A trigger is either a BEFORE or an AFTER trigger. The following constants 3712 ** determine which. 3713 ** 3714 ** If there are multiple triggers, you might of some BEFORE and some AFTER. 3715 ** In that cases, the constants below can be ORed together. 3716 */ 3717 #define TRIGGER_BEFORE 1 3718 #define TRIGGER_AFTER 2 3719 3720 /* 3721 * An instance of struct TriggerStep is used to store a single SQL statement 3722 * that is a part of a trigger-program. 3723 * 3724 * Instances of struct TriggerStep are stored in a singly linked list (linked 3725 * using the "pNext" member) referenced by the "step_list" member of the 3726 * associated struct Trigger instance. The first element of the linked list is 3727 * the first step of the trigger-program. 3728 * 3729 * The "op" member indicates whether this is a "DELETE", "INSERT", "UPDATE" or 3730 * "SELECT" statement. The meanings of the other members is determined by the 3731 * value of "op" as follows: 3732 * 3733 * (op == TK_INSERT) 3734 * orconf -> stores the ON CONFLICT algorithm 3735 * pSelect -> If this is an INSERT INTO ... SELECT ... statement, then 3736 * this stores a pointer to the SELECT statement. Otherwise NULL. 3737 * zTarget -> Dequoted name of the table to insert into. 3738 * pExprList -> If this is an INSERT INTO ... VALUES ... statement, then 3739 * this stores values to be inserted. Otherwise NULL. 3740 * pIdList -> If this is an INSERT INTO ... (<column-names>) VALUES ... 3741 * statement, then this stores the column-names to be 3742 * inserted into. 3743 * 3744 * (op == TK_DELETE) 3745 * zTarget -> Dequoted name of the table to delete from. 3746 * pWhere -> The WHERE clause of the DELETE statement if one is specified. 3747 * Otherwise NULL. 3748 * 3749 * (op == TK_UPDATE) 3750 * zTarget -> Dequoted name of the table to update. 3751 * pWhere -> The WHERE clause of the UPDATE statement if one is specified. 3752 * Otherwise NULL. 3753 * pExprList -> A list of the columns to update and the expressions to update 3754 * them to. See sqlite3Update() documentation of "pChanges" 3755 * argument. 3756 * 3757 */ 3758 struct TriggerStep { 3759 u8 op; /* One of TK_DELETE, TK_UPDATE, TK_INSERT, TK_SELECT, 3760 ** or TK_RETURNING */ 3761 u8 orconf; /* OE_Rollback etc. */ 3762 Trigger *pTrig; /* The trigger that this step is a part of */ 3763 Select *pSelect; /* SELECT statement or RHS of INSERT INTO SELECT ... */ 3764 char *zTarget; /* Target table for DELETE, UPDATE, INSERT */ 3765 SrcList *pFrom; /* FROM clause for UPDATE statement (if any) */ 3766 Expr *pWhere; /* The WHERE clause for DELETE or UPDATE steps */ 3767 ExprList *pExprList; /* SET clause for UPDATE, or RETURNING clause */ 3768 IdList *pIdList; /* Column names for INSERT */ 3769 Upsert *pUpsert; /* Upsert clauses on an INSERT */ 3770 char *zSpan; /* Original SQL text of this command */ 3771 TriggerStep *pNext; /* Next in the link-list */ 3772 TriggerStep *pLast; /* Last element in link-list. Valid for 1st elem only */ 3773 }; 3774 3775 /* 3776 ** Information about a RETURNING clause 3777 */ 3778 struct Returning { 3779 Parse *pParse; /* The parse that includes the RETURNING clause */ 3780 ExprList *pReturnEL; /* List of expressions to return */ 3781 Trigger retTrig; /* The transient trigger that implements RETURNING */ 3782 TriggerStep retTStep; /* The trigger step */ 3783 int iRetCur; /* Transient table holding RETURNING results */ 3784 int nRetCol; /* Number of in pReturnEL after expansion */ 3785 int iRetReg; /* Register array for holding a row of RETURNING */ 3786 }; 3787 3788 /* 3789 ** An objected used to accumulate the text of a string where we 3790 ** do not necessarily know how big the string will be in the end. 3791 */ 3792 struct sqlite3_str { 3793 sqlite3 *db; /* Optional database for lookaside. Can be NULL */ 3794 char *zText; /* The string collected so far */ 3795 u32 nAlloc; /* Amount of space allocated in zText */ 3796 u32 mxAlloc; /* Maximum allowed allocation. 0 for no malloc usage */ 3797 u32 nChar; /* Length of the string so far */ 3798 u8 accError; /* SQLITE_NOMEM or SQLITE_TOOBIG */ 3799 u8 printfFlags; /* SQLITE_PRINTF flags below */ 3800 }; 3801 #define SQLITE_PRINTF_INTERNAL 0x01 /* Internal-use-only converters allowed */ 3802 #define SQLITE_PRINTF_SQLFUNC 0x02 /* SQL function arguments to VXPrintf */ 3803 #define SQLITE_PRINTF_MALLOCED 0x04 /* True if xText is allocated space */ 3804 3805 #define isMalloced(X) (((X)->printfFlags & SQLITE_PRINTF_MALLOCED)!=0) 3806 3807 3808 /* 3809 ** A pointer to this structure is used to communicate information 3810 ** from sqlite3Init and OP_ParseSchema into the sqlite3InitCallback. 3811 */ 3812 typedef struct { 3813 sqlite3 *db; /* The database being initialized */ 3814 char **pzErrMsg; /* Error message stored here */ 3815 int iDb; /* 0 for main database. 1 for TEMP, 2.. for ATTACHed */ 3816 int rc; /* Result code stored here */ 3817 u32 mInitFlags; /* Flags controlling error messages */ 3818 u32 nInitRow; /* Number of rows processed */ 3819 Pgno mxPage; /* Maximum page number. 0 for no limit. */ 3820 } InitData; 3821 3822 /* 3823 ** Allowed values for mInitFlags 3824 */ 3825 #define INITFLAG_AlterRename 0x0001 /* Reparse after a RENAME */ 3826 #define INITFLAG_AlterDrop 0x0002 /* Reparse after a DROP COLUMN */ 3827 3828 /* Tuning parameters are set using SQLITE_TESTCTRL_TUNE and are controlled 3829 ** on debug-builds of the CLI using ".testctrl tune ID VALUE". Tuning 3830 ** parameters are for temporary use during development, to help find 3831 ** optimial values for parameters in the query planner. The should not 3832 ** be used on trunk check-ins. They are a temporary mechanism available 3833 ** for transient development builds only. 3834 ** 3835 ** Tuning parameters are numbered starting with 1. 3836 */ 3837 #define SQLITE_NTUNE 6 /* Should be zero for all trunk check-ins */ 3838 #ifdef SQLITE_DEBUG 3839 # define Tuning(X) (sqlite3Config.aTune[(X)-1]) 3840 #else 3841 # define Tuning(X) 0 3842 #endif 3843 3844 /* 3845 ** Structure containing global configuration data for the SQLite library. 3846 ** 3847 ** This structure also contains some state information. 3848 */ 3849 struct Sqlite3Config { 3850 int bMemstat; /* True to enable memory status */ 3851 u8 bCoreMutex; /* True to enable core mutexing */ 3852 u8 bFullMutex; /* True to enable full mutexing */ 3853 u8 bOpenUri; /* True to interpret filenames as URIs */ 3854 u8 bUseCis; /* Use covering indices for full-scans */ 3855 u8 bSmallMalloc; /* Avoid large memory allocations if true */ 3856 u8 bExtraSchemaChecks; /* Verify type,name,tbl_name in schema */ 3857 int mxStrlen; /* Maximum string length */ 3858 int neverCorrupt; /* Database is always well-formed */ 3859 int szLookaside; /* Default lookaside buffer size */ 3860 int nLookaside; /* Default lookaside buffer count */ 3861 int nStmtSpill; /* Stmt-journal spill-to-disk threshold */ 3862 sqlite3_mem_methods m; /* Low-level memory allocation interface */ 3863 sqlite3_mutex_methods mutex; /* Low-level mutex interface */ 3864 sqlite3_pcache_methods2 pcache2; /* Low-level page-cache interface */ 3865 void *pHeap; /* Heap storage space */ 3866 int nHeap; /* Size of pHeap[] */ 3867 int mnReq, mxReq; /* Min and max heap requests sizes */ 3868 sqlite3_int64 szMmap; /* mmap() space per open file */ 3869 sqlite3_int64 mxMmap; /* Maximum value for szMmap */ 3870 void *pPage; /* Page cache memory */ 3871 int szPage; /* Size of each page in pPage[] */ 3872 int nPage; /* Number of pages in pPage[] */ 3873 int mxParserStack; /* maximum depth of the parser stack */ 3874 int sharedCacheEnabled; /* true if shared-cache mode enabled */ 3875 u32 szPma; /* Maximum Sorter PMA size */ 3876 /* The above might be initialized to non-zero. The following need to always 3877 ** initially be zero, however. */ 3878 int isInit; /* True after initialization has finished */ 3879 int inProgress; /* True while initialization in progress */ 3880 int isMutexInit; /* True after mutexes are initialized */ 3881 int isMallocInit; /* True after malloc is initialized */ 3882 int isPCacheInit; /* True after malloc is initialized */ 3883 int nRefInitMutex; /* Number of users of pInitMutex */ 3884 sqlite3_mutex *pInitMutex; /* Mutex used by sqlite3_initialize() */ 3885 void (*xLog)(void*,int,const char*); /* Function for logging */ 3886 void *pLogArg; /* First argument to xLog() */ 3887 #ifdef SQLITE_ENABLE_SQLLOG 3888 void(*xSqllog)(void*,sqlite3*,const char*, int); 3889 void *pSqllogArg; 3890 #endif 3891 #ifdef SQLITE_VDBE_COVERAGE 3892 /* The following callback (if not NULL) is invoked on every VDBE branch 3893 ** operation. Set the callback using SQLITE_TESTCTRL_VDBE_COVERAGE. 3894 */ 3895 void (*xVdbeBranch)(void*,unsigned iSrcLine,u8 eThis,u8 eMx); /* Callback */ 3896 void *pVdbeBranchArg; /* 1st argument */ 3897 #endif 3898 #ifndef SQLITE_OMIT_DESERIALIZE 3899 sqlite3_int64 mxMemdbSize; /* Default max memdb size */ 3900 #endif 3901 #ifndef SQLITE_UNTESTABLE 3902 int (*xTestCallback)(int); /* Invoked by sqlite3FaultSim() */ 3903 #endif 3904 int bLocaltimeFault; /* True to fail localtime() calls */ 3905 int iOnceResetThreshold; /* When to reset OP_Once counters */ 3906 u32 szSorterRef; /* Min size in bytes to use sorter-refs */ 3907 unsigned int iPrngSeed; /* Alternative fixed seed for the PRNG */ 3908 /* vvvv--- must be last ---vvv */ 3909 #ifdef SQLITE_DEBUG 3910 sqlite3_int64 aTune[SQLITE_NTUNE]; /* Tuning parameters */ 3911 #endif 3912 }; 3913 3914 /* 3915 ** This macro is used inside of assert() statements to indicate that 3916 ** the assert is only valid on a well-formed database. Instead of: 3917 ** 3918 ** assert( X ); 3919 ** 3920 ** One writes: 3921 ** 3922 ** assert( X || CORRUPT_DB ); 3923 ** 3924 ** CORRUPT_DB is true during normal operation. CORRUPT_DB does not indicate 3925 ** that the database is definitely corrupt, only that it might be corrupt. 3926 ** For most test cases, CORRUPT_DB is set to false using a special 3927 ** sqlite3_test_control(). This enables assert() statements to prove 3928 ** things that are always true for well-formed databases. 3929 */ 3930 #define CORRUPT_DB (sqlite3Config.neverCorrupt==0) 3931 3932 /* 3933 ** Context pointer passed down through the tree-walk. 3934 */ 3935 struct Walker { 3936 Parse *pParse; /* Parser context. */ 3937 int (*xExprCallback)(Walker*, Expr*); /* Callback for expressions */ 3938 int (*xSelectCallback)(Walker*,Select*); /* Callback for SELECTs */ 3939 void (*xSelectCallback2)(Walker*,Select*);/* Second callback for SELECTs */ 3940 int walkerDepth; /* Number of subqueries */ 3941 u16 eCode; /* A small processing code */ 3942 union { /* Extra data for callback */ 3943 NameContext *pNC; /* Naming context */ 3944 int n; /* A counter */ 3945 int iCur; /* A cursor number */ 3946 SrcList *pSrcList; /* FROM clause */ 3947 struct SrcCount *pSrcCount; /* Counting column references */ 3948 struct CCurHint *pCCurHint; /* Used by codeCursorHint() */ 3949 int *aiCol; /* array of column indexes */ 3950 struct IdxCover *pIdxCover; /* Check for index coverage */ 3951 struct IdxExprTrans *pIdxTrans; /* Convert idxed expr to column */ 3952 ExprList *pGroupBy; /* GROUP BY clause */ 3953 Select *pSelect; /* HAVING to WHERE clause ctx */ 3954 struct WindowRewrite *pRewrite; /* Window rewrite context */ 3955 struct WhereConst *pConst; /* WHERE clause constants */ 3956 struct RenameCtx *pRename; /* RENAME COLUMN context */ 3957 struct Table *pTab; /* Table of generated column */ 3958 SrcItem *pSrcItem; /* A single FROM clause item */ 3959 DbFixer *pFix; 3960 } u; 3961 }; 3962 3963 /* 3964 ** The following structure contains information used by the sqliteFix... 3965 ** routines as they walk the parse tree to make database references 3966 ** explicit. 3967 */ 3968 struct DbFixer { 3969 Parse *pParse; /* The parsing context. Error messages written here */ 3970 Walker w; /* Walker object */ 3971 Schema *pSchema; /* Fix items to this schema */ 3972 u8 bTemp; /* True for TEMP schema entries */ 3973 const char *zDb; /* Make sure all objects are contained in this database */ 3974 const char *zType; /* Type of the container - used for error messages */ 3975 const Token *pName; /* Name of the container - used for error messages */ 3976 }; 3977 3978 /* Forward declarations */ 3979 int sqlite3WalkExpr(Walker*, Expr*); 3980 int sqlite3WalkExprList(Walker*, ExprList*); 3981 int sqlite3WalkSelect(Walker*, Select*); 3982 int sqlite3WalkSelectExpr(Walker*, Select*); 3983 int sqlite3WalkSelectFrom(Walker*, Select*); 3984 int sqlite3ExprWalkNoop(Walker*, Expr*); 3985 int sqlite3SelectWalkNoop(Walker*, Select*); 3986 int sqlite3SelectWalkFail(Walker*, Select*); 3987 int sqlite3WalkerDepthIncrease(Walker*,Select*); 3988 void sqlite3WalkerDepthDecrease(Walker*,Select*); 3989 void sqlite3WalkWinDefnDummyCallback(Walker*,Select*); 3990 3991 #ifdef SQLITE_DEBUG 3992 void sqlite3SelectWalkAssert2(Walker*, Select*); 3993 #endif 3994 3995 #ifndef SQLITE_OMIT_CTE 3996 void sqlite3SelectPopWith(Walker*, Select*); 3997 #else 3998 # define sqlite3SelectPopWith 0 3999 #endif 4000 4001 /* 4002 ** Return code from the parse-tree walking primitives and their 4003 ** callbacks. 4004 */ 4005 #define WRC_Continue 0 /* Continue down into children */ 4006 #define WRC_Prune 1 /* Omit children but continue walking siblings */ 4007 #define WRC_Abort 2 /* Abandon the tree walk */ 4008 4009 /* 4010 ** A single common table expression 4011 */ 4012 struct Cte { 4013 char *zName; /* Name of this CTE */ 4014 ExprList *pCols; /* List of explicit column names, or NULL */ 4015 Select *pSelect; /* The definition of this CTE */ 4016 const char *zCteErr; /* Error message for circular references */ 4017 CteUse *pUse; /* Usage information for this CTE */ 4018 u8 eM10d; /* The MATERIALIZED flag */ 4019 }; 4020 4021 /* 4022 ** Allowed values for the materialized flag (eM10d): 4023 */ 4024 #define M10d_Yes 0 /* AS MATERIALIZED */ 4025 #define M10d_Any 1 /* Not specified. Query planner's choice */ 4026 #define M10d_No 2 /* AS NOT MATERIALIZED */ 4027 4028 /* 4029 ** An instance of the With object represents a WITH clause containing 4030 ** one or more CTEs (common table expressions). 4031 */ 4032 struct With { 4033 int nCte; /* Number of CTEs in the WITH clause */ 4034 int bView; /* Belongs to the outermost Select of a view */ 4035 With *pOuter; /* Containing WITH clause, or NULL */ 4036 Cte a[1]; /* For each CTE in the WITH clause.... */ 4037 }; 4038 4039 /* 4040 ** The Cte object is not guaranteed to persist for the entire duration 4041 ** of code generation. (The query flattener or other parser tree 4042 ** edits might delete it.) The following object records information 4043 ** about each Common Table Expression that must be preserved for the 4044 ** duration of the parse. 4045 ** 4046 ** The CteUse objects are freed using sqlite3ParserAddCleanup() rather 4047 ** than sqlite3SelectDelete(), which is what enables them to persist 4048 ** until the end of code generation. 4049 */ 4050 struct CteUse { 4051 int nUse; /* Number of users of this CTE */ 4052 int addrM9e; /* Start of subroutine to compute materialization */ 4053 int regRtn; /* Return address register for addrM9e subroutine */ 4054 int iCur; /* Ephemeral table holding the materialization */ 4055 LogEst nRowEst; /* Estimated number of rows in the table */ 4056 u8 eM10d; /* The MATERIALIZED flag */ 4057 }; 4058 4059 4060 #ifdef SQLITE_DEBUG 4061 /* 4062 ** An instance of the TreeView object is used for printing the content of 4063 ** data structures on sqlite3DebugPrintf() using a tree-like view. 4064 */ 4065 struct TreeView { 4066 int iLevel; /* Which level of the tree we are on */ 4067 u8 bLine[100]; /* Draw vertical in column i if bLine[i] is true */ 4068 }; 4069 #endif /* SQLITE_DEBUG */ 4070 4071 /* 4072 ** This object is used in various ways, most (but not all) related to window 4073 ** functions. 4074 ** 4075 ** (1) A single instance of this structure is attached to the 4076 ** the Expr.y.pWin field for each window function in an expression tree. 4077 ** This object holds the information contained in the OVER clause, 4078 ** plus additional fields used during code generation. 4079 ** 4080 ** (2) All window functions in a single SELECT form a linked-list 4081 ** attached to Select.pWin. The Window.pFunc and Window.pExpr 4082 ** fields point back to the expression that is the window function. 4083 ** 4084 ** (3) The terms of the WINDOW clause of a SELECT are instances of this 4085 ** object on a linked list attached to Select.pWinDefn. 4086 ** 4087 ** (4) For an aggregate function with a FILTER clause, an instance 4088 ** of this object is stored in Expr.y.pWin with eFrmType set to 4089 ** TK_FILTER. In this case the only field used is Window.pFilter. 4090 ** 4091 ** The uses (1) and (2) are really the same Window object that just happens 4092 ** to be accessible in two different ways. Use case (3) are separate objects. 4093 */ 4094 struct Window { 4095 char *zName; /* Name of window (may be NULL) */ 4096 char *zBase; /* Name of base window for chaining (may be NULL) */ 4097 ExprList *pPartition; /* PARTITION BY clause */ 4098 ExprList *pOrderBy; /* ORDER BY clause */ 4099 u8 eFrmType; /* TK_RANGE, TK_GROUPS, TK_ROWS, or 0 */ 4100 u8 eStart; /* UNBOUNDED, CURRENT, PRECEDING or FOLLOWING */ 4101 u8 eEnd; /* UNBOUNDED, CURRENT, PRECEDING or FOLLOWING */ 4102 u8 bImplicitFrame; /* True if frame was implicitly specified */ 4103 u8 eExclude; /* TK_NO, TK_CURRENT, TK_TIES, TK_GROUP, or 0 */ 4104 Expr *pStart; /* Expression for "<expr> PRECEDING" */ 4105 Expr *pEnd; /* Expression for "<expr> FOLLOWING" */ 4106 Window **ppThis; /* Pointer to this object in Select.pWin list */ 4107 Window *pNextWin; /* Next window function belonging to this SELECT */ 4108 Expr *pFilter; /* The FILTER expression */ 4109 FuncDef *pFunc; /* The function */ 4110 int iEphCsr; /* Partition buffer or Peer buffer */ 4111 int regAccum; /* Accumulator */ 4112 int regResult; /* Interim result */ 4113 int csrApp; /* Function cursor (used by min/max) */ 4114 int regApp; /* Function register (also used by min/max) */ 4115 int regPart; /* Array of registers for PARTITION BY values */ 4116 Expr *pOwner; /* Expression object this window is attached to */ 4117 int nBufferCol; /* Number of columns in buffer table */ 4118 int iArgCol; /* Offset of first argument for this function */ 4119 int regOne; /* Register containing constant value 1 */ 4120 int regStartRowid; 4121 int regEndRowid; 4122 u8 bExprArgs; /* Defer evaluation of window function arguments 4123 ** due to the SQLITE_SUBTYPE flag */ 4124 }; 4125 4126 #ifndef SQLITE_OMIT_WINDOWFUNC 4127 void sqlite3WindowDelete(sqlite3*, Window*); 4128 void sqlite3WindowUnlinkFromSelect(Window*); 4129 void sqlite3WindowListDelete(sqlite3 *db, Window *p); 4130 Window *sqlite3WindowAlloc(Parse*, int, int, Expr*, int , Expr*, u8); 4131 void sqlite3WindowAttach(Parse*, Expr*, Window*); 4132 void sqlite3WindowLink(Select *pSel, Window *pWin); 4133 int sqlite3WindowCompare(const Parse*, const Window*, const Window*, int); 4134 void sqlite3WindowCodeInit(Parse*, Select*); 4135 void sqlite3WindowCodeStep(Parse*, Select*, WhereInfo*, int, int); 4136 int sqlite3WindowRewrite(Parse*, Select*); 4137 void sqlite3WindowUpdate(Parse*, Window*, Window*, FuncDef*); 4138 Window *sqlite3WindowDup(sqlite3 *db, Expr *pOwner, Window *p); 4139 Window *sqlite3WindowListDup(sqlite3 *db, Window *p); 4140 void sqlite3WindowFunctions(void); 4141 void sqlite3WindowChain(Parse*, Window*, Window*); 4142 Window *sqlite3WindowAssemble(Parse*, Window*, ExprList*, ExprList*, Token*); 4143 #else 4144 # define sqlite3WindowDelete(a,b) 4145 # define sqlite3WindowFunctions() 4146 # define sqlite3WindowAttach(a,b,c) 4147 #endif 4148 4149 /* 4150 ** Assuming zIn points to the first byte of a UTF-8 character, 4151 ** advance zIn to point to the first byte of the next UTF-8 character. 4152 */ 4153 #define SQLITE_SKIP_UTF8(zIn) { \ 4154 if( (*(zIn++))>=0xc0 ){ \ 4155 while( (*zIn & 0xc0)==0x80 ){ zIn++; } \ 4156 } \ 4157 } 4158 4159 /* 4160 ** The SQLITE_*_BKPT macros are substitutes for the error codes with 4161 ** the same name but without the _BKPT suffix. These macros invoke 4162 ** routines that report the line-number on which the error originated 4163 ** using sqlite3_log(). The routines also provide a convenient place 4164 ** to set a debugger breakpoint. 4165 */ 4166 int sqlite3ReportError(int iErr, int lineno, const char *zType); 4167 int sqlite3CorruptError(int); 4168 int sqlite3MisuseError(int); 4169 int sqlite3CantopenError(int); 4170 #define SQLITE_CORRUPT_BKPT sqlite3CorruptError(__LINE__) 4171 #define SQLITE_MISUSE_BKPT sqlite3MisuseError(__LINE__) 4172 #define SQLITE_CANTOPEN_BKPT sqlite3CantopenError(__LINE__) 4173 #ifdef SQLITE_DEBUG 4174 int sqlite3NomemError(int); 4175 int sqlite3IoerrnomemError(int); 4176 # define SQLITE_NOMEM_BKPT sqlite3NomemError(__LINE__) 4177 # define SQLITE_IOERR_NOMEM_BKPT sqlite3IoerrnomemError(__LINE__) 4178 #else 4179 # define SQLITE_NOMEM_BKPT SQLITE_NOMEM 4180 # define SQLITE_IOERR_NOMEM_BKPT SQLITE_IOERR_NOMEM 4181 #endif 4182 #if defined(SQLITE_DEBUG) || defined(SQLITE_ENABLE_CORRUPT_PGNO) 4183 int sqlite3CorruptPgnoError(int,Pgno); 4184 # define SQLITE_CORRUPT_PGNO(P) sqlite3CorruptPgnoError(__LINE__,(P)) 4185 #else 4186 # define SQLITE_CORRUPT_PGNO(P) sqlite3CorruptError(__LINE__) 4187 #endif 4188 4189 /* 4190 ** FTS3 and FTS4 both require virtual table support 4191 */ 4192 #if defined(SQLITE_OMIT_VIRTUALTABLE) 4193 # undef SQLITE_ENABLE_FTS3 4194 # undef SQLITE_ENABLE_FTS4 4195 #endif 4196 4197 /* 4198 ** FTS4 is really an extension for FTS3. It is enabled using the 4199 ** SQLITE_ENABLE_FTS3 macro. But to avoid confusion we also call 4200 ** the SQLITE_ENABLE_FTS4 macro to serve as an alias for SQLITE_ENABLE_FTS3. 4201 */ 4202 #if defined(SQLITE_ENABLE_FTS4) && !defined(SQLITE_ENABLE_FTS3) 4203 # define SQLITE_ENABLE_FTS3 1 4204 #endif 4205 4206 /* 4207 ** The ctype.h header is needed for non-ASCII systems. It is also 4208 ** needed by FTS3 when FTS3 is included in the amalgamation. 4209 */ 4210 #if !defined(SQLITE_ASCII) || \ 4211 (defined(SQLITE_ENABLE_FTS3) && defined(SQLITE_AMALGAMATION)) 4212 # include <ctype.h> 4213 #endif 4214 4215 /* 4216 ** The following macros mimic the standard library functions toupper(), 4217 ** isspace(), isalnum(), isdigit() and isxdigit(), respectively. The 4218 ** sqlite versions only work for ASCII characters, regardless of locale. 4219 */ 4220 #ifdef SQLITE_ASCII 4221 # define sqlite3Toupper(x) ((x)&~(sqlite3CtypeMap[(unsigned char)(x)]&0x20)) 4222 # define sqlite3Isspace(x) (sqlite3CtypeMap[(unsigned char)(x)]&0x01) 4223 # define sqlite3Isalnum(x) (sqlite3CtypeMap[(unsigned char)(x)]&0x06) 4224 # define sqlite3Isalpha(x) (sqlite3CtypeMap[(unsigned char)(x)]&0x02) 4225 # define sqlite3Isdigit(x) (sqlite3CtypeMap[(unsigned char)(x)]&0x04) 4226 # define sqlite3Isxdigit(x) (sqlite3CtypeMap[(unsigned char)(x)]&0x08) 4227 # define sqlite3Tolower(x) (sqlite3UpperToLower[(unsigned char)(x)]) 4228 # define sqlite3Isquote(x) (sqlite3CtypeMap[(unsigned char)(x)]&0x80) 4229 #else 4230 # define sqlite3Toupper(x) toupper((unsigned char)(x)) 4231 # define sqlite3Isspace(x) isspace((unsigned char)(x)) 4232 # define sqlite3Isalnum(x) isalnum((unsigned char)(x)) 4233 # define sqlite3Isalpha(x) isalpha((unsigned char)(x)) 4234 # define sqlite3Isdigit(x) isdigit((unsigned char)(x)) 4235 # define sqlite3Isxdigit(x) isxdigit((unsigned char)(x)) 4236 # define sqlite3Tolower(x) tolower((unsigned char)(x)) 4237 # define sqlite3Isquote(x) ((x)=='"'||(x)=='\''||(x)=='['||(x)=='`') 4238 #endif 4239 int sqlite3IsIdChar(u8); 4240 4241 /* 4242 ** Internal function prototypes 4243 */ 4244 int sqlite3StrICmp(const char*,const char*); 4245 int sqlite3Strlen30(const char*); 4246 #define sqlite3Strlen30NN(C) (strlen(C)&0x3fffffff) 4247 char *sqlite3ColumnType(Column*,char*); 4248 #define sqlite3StrNICmp sqlite3_strnicmp 4249 4250 int sqlite3MallocInit(void); 4251 void sqlite3MallocEnd(void); 4252 void *sqlite3Malloc(u64); 4253 void *sqlite3MallocZero(u64); 4254 void *sqlite3DbMallocZero(sqlite3*, u64); 4255 void *sqlite3DbMallocRaw(sqlite3*, u64); 4256 void *sqlite3DbMallocRawNN(sqlite3*, u64); 4257 char *sqlite3DbStrDup(sqlite3*,const char*); 4258 char *sqlite3DbStrNDup(sqlite3*,const char*, u64); 4259 char *sqlite3DbSpanDup(sqlite3*,const char*,const char*); 4260 void *sqlite3Realloc(void*, u64); 4261 void *sqlite3DbReallocOrFree(sqlite3 *, void *, u64); 4262 void *sqlite3DbRealloc(sqlite3 *, void *, u64); 4263 void sqlite3DbFree(sqlite3*, void*); 4264 void sqlite3DbFreeNN(sqlite3*, void*); 4265 int sqlite3MallocSize(const void*); 4266 int sqlite3DbMallocSize(sqlite3*, const void*); 4267 void *sqlite3PageMalloc(int); 4268 void sqlite3PageFree(void*); 4269 void sqlite3MemSetDefault(void); 4270 #ifndef SQLITE_UNTESTABLE 4271 void sqlite3BenignMallocHooks(void (*)(void), void (*)(void)); 4272 #endif 4273 int sqlite3HeapNearlyFull(void); 4274 4275 /* 4276 ** On systems with ample stack space and that support alloca(), make 4277 ** use of alloca() to obtain space for large automatic objects. By default, 4278 ** obtain space from malloc(). 4279 ** 4280 ** The alloca() routine never returns NULL. This will cause code paths 4281 ** that deal with sqlite3StackAlloc() failures to be unreachable. 4282 */ 4283 #ifdef SQLITE_USE_ALLOCA 4284 # define sqlite3StackAllocRaw(D,N) alloca(N) 4285 # define sqlite3StackAllocZero(D,N) memset(alloca(N), 0, N) 4286 # define sqlite3StackFree(D,P) 4287 #else 4288 # define sqlite3StackAllocRaw(D,N) sqlite3DbMallocRaw(D,N) 4289 # define sqlite3StackAllocZero(D,N) sqlite3DbMallocZero(D,N) 4290 # define sqlite3StackFree(D,P) sqlite3DbFree(D,P) 4291 #endif 4292 4293 /* Do not allow both MEMSYS5 and MEMSYS3 to be defined together. If they 4294 ** are, disable MEMSYS3 4295 */ 4296 #ifdef SQLITE_ENABLE_MEMSYS5 4297 const sqlite3_mem_methods *sqlite3MemGetMemsys5(void); 4298 #undef SQLITE_ENABLE_MEMSYS3 4299 #endif 4300 #ifdef SQLITE_ENABLE_MEMSYS3 4301 const sqlite3_mem_methods *sqlite3MemGetMemsys3(void); 4302 #endif 4303 4304 4305 #ifndef SQLITE_MUTEX_OMIT 4306 sqlite3_mutex_methods const *sqlite3DefaultMutex(void); 4307 sqlite3_mutex_methods const *sqlite3NoopMutex(void); 4308 sqlite3_mutex *sqlite3MutexAlloc(int); 4309 int sqlite3MutexInit(void); 4310 int sqlite3MutexEnd(void); 4311 #endif 4312 #if !defined(SQLITE_MUTEX_OMIT) && !defined(SQLITE_MUTEX_NOOP) 4313 void sqlite3MemoryBarrier(void); 4314 #else 4315 # define sqlite3MemoryBarrier() 4316 #endif 4317 4318 sqlite3_int64 sqlite3StatusValue(int); 4319 void sqlite3StatusUp(int, int); 4320 void sqlite3StatusDown(int, int); 4321 void sqlite3StatusHighwater(int, int); 4322 int sqlite3LookasideUsed(sqlite3*,int*); 4323 4324 /* Access to mutexes used by sqlite3_status() */ 4325 sqlite3_mutex *sqlite3Pcache1Mutex(void); 4326 sqlite3_mutex *sqlite3MallocMutex(void); 4327 4328 #if defined(SQLITE_ENABLE_MULTITHREADED_CHECKS) && !defined(SQLITE_MUTEX_OMIT) 4329 void sqlite3MutexWarnOnContention(sqlite3_mutex*); 4330 #else 4331 # define sqlite3MutexWarnOnContention(x) 4332 #endif 4333 4334 #ifndef SQLITE_OMIT_FLOATING_POINT 4335 # define EXP754 (((u64)0x7ff)<<52) 4336 # define MAN754 ((((u64)1)<<52)-1) 4337 # define IsNaN(X) (((X)&EXP754)==EXP754 && ((X)&MAN754)!=0) 4338 int sqlite3IsNaN(double); 4339 #else 4340 # define IsNaN(X) 0 4341 # define sqlite3IsNaN(X) 0 4342 #endif 4343 4344 /* 4345 ** An instance of the following structure holds information about SQL 4346 ** functions arguments that are the parameters to the printf() function. 4347 */ 4348 struct PrintfArguments { 4349 int nArg; /* Total number of arguments */ 4350 int nUsed; /* Number of arguments used so far */ 4351 sqlite3_value **apArg; /* The argument values */ 4352 }; 4353 4354 char *sqlite3MPrintf(sqlite3*,const char*, ...); 4355 char *sqlite3VMPrintf(sqlite3*,const char*, va_list); 4356 #if defined(SQLITE_DEBUG) || defined(SQLITE_HAVE_OS_TRACE) 4357 void sqlite3DebugPrintf(const char*, ...); 4358 #endif 4359 #if defined(SQLITE_TEST) 4360 void *sqlite3TestTextToPtr(const char*); 4361 #endif 4362 4363 #if defined(SQLITE_DEBUG) 4364 void sqlite3TreeViewExpr(TreeView*, const Expr*, u8); 4365 void sqlite3TreeViewBareExprList(TreeView*, const ExprList*, const char*); 4366 void sqlite3TreeViewExprList(TreeView*, const ExprList*, u8, const char*); 4367 void sqlite3TreeViewSrcList(TreeView*, const SrcList*); 4368 void sqlite3TreeViewSelect(TreeView*, const Select*, u8); 4369 void sqlite3TreeViewWith(TreeView*, const With*, u8); 4370 #ifndef SQLITE_OMIT_WINDOWFUNC 4371 void sqlite3TreeViewWindow(TreeView*, const Window*, u8); 4372 void sqlite3TreeViewWinFunc(TreeView*, const Window*, u8); 4373 #endif 4374 #endif 4375 4376 4377 void sqlite3SetString(char **, sqlite3*, const char*); 4378 void sqlite3ErrorMsg(Parse*, const char*, ...); 4379 int sqlite3ErrorToParser(sqlite3*,int); 4380 void sqlite3Dequote(char*); 4381 void sqlite3DequoteExpr(Expr*); 4382 void sqlite3DequoteToken(Token*); 4383 void sqlite3TokenInit(Token*,char*); 4384 int sqlite3KeywordCode(const unsigned char*, int); 4385 int sqlite3RunParser(Parse*, const char*, char **); 4386 void sqlite3FinishCoding(Parse*); 4387 int sqlite3GetTempReg(Parse*); 4388 void sqlite3ReleaseTempReg(Parse*,int); 4389 int sqlite3GetTempRange(Parse*,int); 4390 void sqlite3ReleaseTempRange(Parse*,int,int); 4391 void sqlite3ClearTempRegCache(Parse*); 4392 #ifdef SQLITE_DEBUG 4393 int sqlite3NoTempsInRange(Parse*,int,int); 4394 #endif 4395 Expr *sqlite3ExprAlloc(sqlite3*,int,const Token*,int); 4396 Expr *sqlite3Expr(sqlite3*,int,const char*); 4397 void sqlite3ExprAttachSubtrees(sqlite3*,Expr*,Expr*,Expr*); 4398 Expr *sqlite3PExpr(Parse*, int, Expr*, Expr*); 4399 void sqlite3PExprAddSelect(Parse*, Expr*, Select*); 4400 Expr *sqlite3ExprAnd(Parse*,Expr*, Expr*); 4401 Expr *sqlite3ExprSimplifiedAndOr(Expr*); 4402 Expr *sqlite3ExprFunction(Parse*,ExprList*, const Token*, int); 4403 void sqlite3ExprFunctionUsable(Parse*,const Expr*,const FuncDef*); 4404 void sqlite3ExprAssignVarNumber(Parse*, Expr*, u32); 4405 void sqlite3ExprDelete(sqlite3*, Expr*); 4406 void sqlite3ExprDeferredDelete(Parse*, Expr*); 4407 void sqlite3ExprUnmapAndDelete(Parse*, Expr*); 4408 ExprList *sqlite3ExprListAppend(Parse*,ExprList*,Expr*); 4409 ExprList *sqlite3ExprListAppendVector(Parse*,ExprList*,IdList*,Expr*); 4410 Select *sqlite3ExprListToValues(Parse*, int, ExprList*); 4411 void sqlite3ExprListSetSortOrder(ExprList*,int,int); 4412 void sqlite3ExprListSetName(Parse*,ExprList*,const Token*,int); 4413 void sqlite3ExprListSetSpan(Parse*,ExprList*,const char*,const char*); 4414 void sqlite3ExprListDelete(sqlite3*, ExprList*); 4415 u32 sqlite3ExprListFlags(const ExprList*); 4416 int sqlite3IndexHasDuplicateRootPage(Index*); 4417 int sqlite3Init(sqlite3*, char**); 4418 int sqlite3InitCallback(void*, int, char**, char**); 4419 int sqlite3InitOne(sqlite3*, int, char**, u32); 4420 void sqlite3Pragma(Parse*,Token*,Token*,Token*,int); 4421 #ifndef SQLITE_OMIT_VIRTUALTABLE 4422 Module *sqlite3PragmaVtabRegister(sqlite3*,const char *zName); 4423 #endif 4424 void sqlite3ResetAllSchemasOfConnection(sqlite3*); 4425 void sqlite3ResetOneSchema(sqlite3*,int); 4426 void sqlite3CollapseDatabaseArray(sqlite3*); 4427 void sqlite3CommitInternalChanges(sqlite3*); 4428 void sqlite3ColumnSetExpr(Parse*,Table*,Column*,Expr*); 4429 Expr *sqlite3ColumnExpr(Table*,Column*); 4430 void sqlite3ColumnSetColl(sqlite3*,Column*,const char*zColl); 4431 const char *sqlite3ColumnColl(Column*); 4432 void sqlite3DeleteColumnNames(sqlite3*,Table*); 4433 void sqlite3GenerateColumnNames(Parse *pParse, Select *pSelect); 4434 int sqlite3ColumnsFromExprList(Parse*,ExprList*,i16*,Column**); 4435 void sqlite3SelectAddColumnTypeAndCollation(Parse*,Table*,Select*,char); 4436 Table *sqlite3ResultSetOfSelect(Parse*,Select*,char); 4437 void sqlite3OpenSchemaTable(Parse *, int); 4438 Index *sqlite3PrimaryKeyIndex(Table*); 4439 i16 sqlite3TableColumnToIndex(Index*, i16); 4440 #ifdef SQLITE_OMIT_GENERATED_COLUMNS 4441 # define sqlite3TableColumnToStorage(T,X) (X) /* No-op pass-through */ 4442 # define sqlite3StorageColumnToTable(T,X) (X) /* No-op pass-through */ 4443 #else 4444 i16 sqlite3TableColumnToStorage(Table*, i16); 4445 i16 sqlite3StorageColumnToTable(Table*, i16); 4446 #endif 4447 void sqlite3StartTable(Parse*,Token*,Token*,int,int,int,int); 4448 #if SQLITE_ENABLE_HIDDEN_COLUMNS 4449 void sqlite3ColumnPropertiesFromName(Table*, Column*); 4450 #else 4451 # define sqlite3ColumnPropertiesFromName(T,C) /* no-op */ 4452 #endif 4453 void sqlite3AddColumn(Parse*,Token,Token); 4454 void sqlite3AddNotNull(Parse*, int); 4455 void sqlite3AddPrimaryKey(Parse*, ExprList*, int, int, int); 4456 void sqlite3AddCheckConstraint(Parse*, Expr*, const char*, const char*); 4457 void sqlite3AddDefaultValue(Parse*,Expr*,const char*,const char*); 4458 void sqlite3AddCollateType(Parse*, Token*); 4459 void sqlite3AddGenerated(Parse*,Expr*,Token*); 4460 void sqlite3EndTable(Parse*,Token*,Token*,u32,Select*); 4461 void sqlite3AddReturning(Parse*,ExprList*); 4462 int sqlite3ParseUri(const char*,const char*,unsigned int*, 4463 sqlite3_vfs**,char**,char **); 4464 #define sqlite3CodecQueryParameters(A,B,C) 0 4465 Btree *sqlite3DbNameToBtree(sqlite3*,const char*); 4466 4467 #ifdef SQLITE_UNTESTABLE 4468 # define sqlite3FaultSim(X) SQLITE_OK 4469 #else 4470 int sqlite3FaultSim(int); 4471 #endif 4472 4473 Bitvec *sqlite3BitvecCreate(u32); 4474 int sqlite3BitvecTest(Bitvec*, u32); 4475 int sqlite3BitvecTestNotNull(Bitvec*, u32); 4476 int sqlite3BitvecSet(Bitvec*, u32); 4477 void sqlite3BitvecClear(Bitvec*, u32, void*); 4478 void sqlite3BitvecDestroy(Bitvec*); 4479 u32 sqlite3BitvecSize(Bitvec*); 4480 #ifndef SQLITE_UNTESTABLE 4481 int sqlite3BitvecBuiltinTest(int,int*); 4482 #endif 4483 4484 RowSet *sqlite3RowSetInit(sqlite3*); 4485 void sqlite3RowSetDelete(void*); 4486 void sqlite3RowSetClear(void*); 4487 void sqlite3RowSetInsert(RowSet*, i64); 4488 int sqlite3RowSetTest(RowSet*, int iBatch, i64); 4489 int sqlite3RowSetNext(RowSet*, i64*); 4490 4491 void sqlite3CreateView(Parse*,Token*,Token*,Token*,ExprList*,Select*,int,int); 4492 4493 #if !defined(SQLITE_OMIT_VIEW) || !defined(SQLITE_OMIT_VIRTUALTABLE) 4494 int sqlite3ViewGetColumnNames(Parse*,Table*); 4495 #else 4496 # define sqlite3ViewGetColumnNames(A,B) 0 4497 #endif 4498 4499 #if SQLITE_MAX_ATTACHED>30 4500 int sqlite3DbMaskAllZero(yDbMask); 4501 #endif 4502 void sqlite3DropTable(Parse*, SrcList*, int, int); 4503 void sqlite3CodeDropTable(Parse*, Table*, int, int); 4504 void sqlite3DeleteTable(sqlite3*, Table*); 4505 void sqlite3FreeIndex(sqlite3*, Index*); 4506 #ifndef SQLITE_OMIT_AUTOINCREMENT 4507 void sqlite3AutoincrementBegin(Parse *pParse); 4508 void sqlite3AutoincrementEnd(Parse *pParse); 4509 #else 4510 # define sqlite3AutoincrementBegin(X) 4511 # define sqlite3AutoincrementEnd(X) 4512 #endif 4513 void sqlite3Insert(Parse*, SrcList*, Select*, IdList*, int, Upsert*); 4514 #ifndef SQLITE_OMIT_GENERATED_COLUMNS 4515 void sqlite3ComputeGeneratedColumns(Parse*, int, Table*); 4516 #endif 4517 void *sqlite3ArrayAllocate(sqlite3*,void*,int,int*,int*); 4518 IdList *sqlite3IdListAppend(Parse*, IdList*, Token*); 4519 int sqlite3IdListIndex(IdList*,const char*); 4520 SrcList *sqlite3SrcListEnlarge(Parse*, SrcList*, int, int); 4521 SrcList *sqlite3SrcListAppendList(Parse *pParse, SrcList *p1, SrcList *p2); 4522 SrcList *sqlite3SrcListAppend(Parse*, SrcList*, Token*, Token*); 4523 SrcList *sqlite3SrcListAppendFromTerm(Parse*, SrcList*, Token*, Token*, 4524 Token*, Select*, Expr*, IdList*); 4525 void sqlite3SrcListIndexedBy(Parse *, SrcList *, Token *); 4526 void sqlite3SrcListFuncArgs(Parse*, SrcList*, ExprList*); 4527 int sqlite3IndexedByLookup(Parse *, SrcItem *); 4528 void sqlite3SrcListShiftJoinType(SrcList*); 4529 void sqlite3SrcListAssignCursors(Parse*, SrcList*); 4530 void sqlite3IdListDelete(sqlite3*, IdList*); 4531 void sqlite3SrcListDelete(sqlite3*, SrcList*); 4532 Index *sqlite3AllocateIndexObject(sqlite3*,i16,int,char**); 4533 void sqlite3CreateIndex(Parse*,Token*,Token*,SrcList*,ExprList*,int,Token*, 4534 Expr*, int, int, u8); 4535 void sqlite3DropIndex(Parse*, SrcList*, int); 4536 int sqlite3Select(Parse*, Select*, SelectDest*); 4537 Select *sqlite3SelectNew(Parse*,ExprList*,SrcList*,Expr*,ExprList*, 4538 Expr*,ExprList*,u32,Expr*); 4539 void sqlite3SelectDelete(sqlite3*, Select*); 4540 Table *sqlite3SrcListLookup(Parse*, SrcList*); 4541 int sqlite3IsReadOnly(Parse*, Table*, int); 4542 void sqlite3OpenTable(Parse*, int iCur, int iDb, Table*, int); 4543 #if defined(SQLITE_ENABLE_UPDATE_DELETE_LIMIT) && !defined(SQLITE_OMIT_SUBQUERY) 4544 Expr *sqlite3LimitWhere(Parse*,SrcList*,Expr*,ExprList*,Expr*,char*); 4545 #endif 4546 void sqlite3DeleteFrom(Parse*, SrcList*, Expr*, ExprList*, Expr*); 4547 void sqlite3Update(Parse*, SrcList*, ExprList*,Expr*,int,ExprList*,Expr*, 4548 Upsert*); 4549 WhereInfo *sqlite3WhereBegin(Parse*,SrcList*,Expr*,ExprList*,ExprList*,u16,int); 4550 void sqlite3WhereEnd(WhereInfo*); 4551 LogEst sqlite3WhereOutputRowCount(WhereInfo*); 4552 int sqlite3WhereIsDistinct(WhereInfo*); 4553 int sqlite3WhereIsOrdered(WhereInfo*); 4554 int sqlite3WhereOrderByLimitOptLabel(WhereInfo*); 4555 void sqlite3WhereMinMaxOptEarlyOut(Vdbe*,WhereInfo*); 4556 int sqlite3WhereIsSorted(WhereInfo*); 4557 int sqlite3WhereContinueLabel(WhereInfo*); 4558 int sqlite3WhereBreakLabel(WhereInfo*); 4559 int sqlite3WhereOkOnePass(WhereInfo*, int*); 4560 #define ONEPASS_OFF 0 /* Use of ONEPASS not allowed */ 4561 #define ONEPASS_SINGLE 1 /* ONEPASS valid for a single row update */ 4562 #define ONEPASS_MULTI 2 /* ONEPASS is valid for multiple rows */ 4563 int sqlite3WhereUsesDeferredSeek(WhereInfo*); 4564 void sqlite3ExprCodeLoadIndexColumn(Parse*, Index*, int, int, int); 4565 int sqlite3ExprCodeGetColumn(Parse*, Table*, int, int, int, u8); 4566 void sqlite3ExprCodeGetColumnOfTable(Vdbe*, Table*, int, int, int); 4567 void sqlite3ExprCodeMove(Parse*, int, int, int); 4568 void sqlite3ExprCode(Parse*, Expr*, int); 4569 #ifndef SQLITE_OMIT_GENERATED_COLUMNS 4570 void sqlite3ExprCodeGeneratedColumn(Parse*, Table*, Column*, int); 4571 #endif 4572 void sqlite3ExprCodeCopy(Parse*, Expr*, int); 4573 void sqlite3ExprCodeFactorable(Parse*, Expr*, int); 4574 int sqlite3ExprCodeRunJustOnce(Parse*, Expr*, int); 4575 int sqlite3ExprCodeTemp(Parse*, Expr*, int*); 4576 int sqlite3ExprCodeTarget(Parse*, Expr*, int); 4577 int sqlite3ExprCodeExprList(Parse*, ExprList*, int, int, u8); 4578 #define SQLITE_ECEL_DUP 0x01 /* Deep, not shallow copies */ 4579 #define SQLITE_ECEL_FACTOR 0x02 /* Factor out constant terms */ 4580 #define SQLITE_ECEL_REF 0x04 /* Use ExprList.u.x.iOrderByCol */ 4581 #define SQLITE_ECEL_OMITREF 0x08 /* Omit if ExprList.u.x.iOrderByCol */ 4582 void sqlite3ExprIfTrue(Parse*, Expr*, int, int); 4583 void sqlite3ExprIfFalse(Parse*, Expr*, int, int); 4584 void sqlite3ExprIfFalseDup(Parse*, Expr*, int, int); 4585 Table *sqlite3FindTable(sqlite3*,const char*, const char*); 4586 #define LOCATE_VIEW 0x01 4587 #define LOCATE_NOERR 0x02 4588 Table *sqlite3LocateTable(Parse*,u32 flags,const char*, const char*); 4589 Table *sqlite3LocateTableItem(Parse*,u32 flags,SrcItem *); 4590 Index *sqlite3FindIndex(sqlite3*,const char*, const char*); 4591 void sqlite3UnlinkAndDeleteTable(sqlite3*,int,const char*); 4592 void sqlite3UnlinkAndDeleteIndex(sqlite3*,int,const char*); 4593 void sqlite3Vacuum(Parse*,Token*,Expr*); 4594 int sqlite3RunVacuum(char**, sqlite3*, int, sqlite3_value*); 4595 char *sqlite3NameFromToken(sqlite3*, const Token*); 4596 int sqlite3ExprCompare(const Parse*,const Expr*,const Expr*, int); 4597 int sqlite3ExprCompareSkip(Expr*,Expr*,int); 4598 int sqlite3ExprListCompare(const ExprList*,const ExprList*, int); 4599 int sqlite3ExprImpliesExpr(const Parse*,const Expr*,const Expr*, int); 4600 int sqlite3ExprImpliesNonNullRow(Expr*,int); 4601 void sqlite3AggInfoPersistWalkerInit(Walker*,Parse*); 4602 void sqlite3ExprAnalyzeAggregates(NameContext*, Expr*); 4603 void sqlite3ExprAnalyzeAggList(NameContext*,ExprList*); 4604 int sqlite3ExprCoveredByIndex(Expr*, int iCur, Index *pIdx); 4605 int sqlite3FunctionUsesThisSrc(Expr*, SrcList*); 4606 Vdbe *sqlite3GetVdbe(Parse*); 4607 #ifndef SQLITE_UNTESTABLE 4608 void sqlite3PrngSaveState(void); 4609 void sqlite3PrngRestoreState(void); 4610 #endif 4611 void sqlite3RollbackAll(sqlite3*,int); 4612 void sqlite3CodeVerifySchema(Parse*, int); 4613 void sqlite3CodeVerifyNamedSchema(Parse*, const char *zDb); 4614 void sqlite3BeginTransaction(Parse*, int); 4615 void sqlite3EndTransaction(Parse*,int); 4616 void sqlite3Savepoint(Parse*, int, Token*); 4617 void sqlite3CloseSavepoints(sqlite3 *); 4618 void sqlite3LeaveMutexAndCloseZombie(sqlite3*); 4619 u32 sqlite3IsTrueOrFalse(const char*); 4620 int sqlite3ExprIdToTrueFalse(Expr*); 4621 int sqlite3ExprTruthValue(const Expr*); 4622 int sqlite3ExprIsConstant(Expr*); 4623 int sqlite3ExprIsConstantNotJoin(Expr*); 4624 int sqlite3ExprIsConstantOrFunction(Expr*, u8); 4625 int sqlite3ExprIsConstantOrGroupBy(Parse*, Expr*, ExprList*); 4626 int sqlite3ExprIsTableConstant(Expr*,int); 4627 #ifdef SQLITE_ENABLE_CURSOR_HINTS 4628 int sqlite3ExprContainsSubquery(Expr*); 4629 #endif 4630 int sqlite3ExprIsInteger(const Expr*, int*); 4631 int sqlite3ExprCanBeNull(const Expr*); 4632 int sqlite3ExprNeedsNoAffinityChange(const Expr*, char); 4633 int sqlite3IsRowid(const char*); 4634 void sqlite3GenerateRowDelete( 4635 Parse*,Table*,Trigger*,int,int,int,i16,u8,u8,u8,int); 4636 void sqlite3GenerateRowIndexDelete(Parse*, Table*, int, int, int*, int); 4637 int sqlite3GenerateIndexKey(Parse*, Index*, int, int, int, int*,Index*,int); 4638 void sqlite3ResolvePartIdxLabel(Parse*,int); 4639 int sqlite3ExprReferencesUpdatedColumn(Expr*,int*,int); 4640 void sqlite3GenerateConstraintChecks(Parse*,Table*,int*,int,int,int,int, 4641 u8,u8,int,int*,int*,Upsert*); 4642 #ifdef SQLITE_ENABLE_NULL_TRIM 4643 void sqlite3SetMakeRecordP5(Vdbe*,Table*); 4644 #else 4645 # define sqlite3SetMakeRecordP5(A,B) 4646 #endif 4647 void sqlite3CompleteInsertion(Parse*,Table*,int,int,int,int*,int,int,int); 4648 int sqlite3OpenTableAndIndices(Parse*, Table*, int, u8, int, u8*, int*, int*); 4649 void sqlite3BeginWriteOperation(Parse*, int, int); 4650 void sqlite3MultiWrite(Parse*); 4651 void sqlite3MayAbort(Parse*); 4652 void sqlite3HaltConstraint(Parse*, int, int, char*, i8, u8); 4653 void sqlite3UniqueConstraint(Parse*, int, Index*); 4654 void sqlite3RowidConstraint(Parse*, int, Table*); 4655 Expr *sqlite3ExprDup(sqlite3*,const Expr*,int); 4656 ExprList *sqlite3ExprListDup(sqlite3*,const ExprList*,int); 4657 SrcList *sqlite3SrcListDup(sqlite3*,const SrcList*,int); 4658 IdList *sqlite3IdListDup(sqlite3*,const IdList*); 4659 Select *sqlite3SelectDup(sqlite3*,const Select*,int); 4660 FuncDef *sqlite3FunctionSearch(int,const char*); 4661 void sqlite3InsertBuiltinFuncs(FuncDef*,int); 4662 FuncDef *sqlite3FindFunction(sqlite3*,const char*,int,u8,u8); 4663 void sqlite3RegisterBuiltinFunctions(void); 4664 void sqlite3RegisterDateTimeFunctions(void); 4665 void sqlite3RegisterPerConnectionBuiltinFunctions(sqlite3*); 4666 int sqlite3SafetyCheckOk(sqlite3*); 4667 int sqlite3SafetyCheckSickOrOk(sqlite3*); 4668 void sqlite3ChangeCookie(Parse*, int); 4669 With *sqlite3WithDup(sqlite3 *db, With *p); 4670 4671 #if !defined(SQLITE_OMIT_VIEW) && !defined(SQLITE_OMIT_TRIGGER) 4672 void sqlite3MaterializeView(Parse*, Table*, Expr*, ExprList*,Expr*,int); 4673 #endif 4674 4675 #ifndef SQLITE_OMIT_TRIGGER 4676 void sqlite3BeginTrigger(Parse*, Token*,Token*,int,int,IdList*,SrcList*, 4677 Expr*,int, int); 4678 void sqlite3FinishTrigger(Parse*, TriggerStep*, Token*); 4679 void sqlite3DropTrigger(Parse*, SrcList*, int); 4680 void sqlite3DropTriggerPtr(Parse*, Trigger*); 4681 Trigger *sqlite3TriggersExist(Parse *, Table*, int, ExprList*, int *pMask); 4682 Trigger *sqlite3TriggerList(Parse *, Table *); 4683 void sqlite3CodeRowTrigger(Parse*, Trigger *, int, ExprList*, int, Table *, 4684 int, int, int); 4685 void sqlite3CodeRowTriggerDirect(Parse *, Trigger *, Table *, int, int, int); 4686 void sqliteViewTriggers(Parse*, Table*, Expr*, int, ExprList*); 4687 void sqlite3DeleteTriggerStep(sqlite3*, TriggerStep*); 4688 TriggerStep *sqlite3TriggerSelectStep(sqlite3*,Select*, 4689 const char*,const char*); 4690 TriggerStep *sqlite3TriggerInsertStep(Parse*,Token*, IdList*, 4691 Select*,u8,Upsert*, 4692 const char*,const char*); 4693 TriggerStep *sqlite3TriggerUpdateStep(Parse*,Token*,SrcList*,ExprList*, 4694 Expr*, u8, const char*,const char*); 4695 TriggerStep *sqlite3TriggerDeleteStep(Parse*,Token*, Expr*, 4696 const char*,const char*); 4697 void sqlite3DeleteTrigger(sqlite3*, Trigger*); 4698 void sqlite3UnlinkAndDeleteTrigger(sqlite3*,int,const char*); 4699 u32 sqlite3TriggerColmask(Parse*,Trigger*,ExprList*,int,int,Table*,int); 4700 SrcList *sqlite3TriggerStepSrc(Parse*, TriggerStep*); 4701 # define sqlite3ParseToplevel(p) ((p)->pToplevel ? (p)->pToplevel : (p)) 4702 # define sqlite3IsToplevel(p) ((p)->pToplevel==0) 4703 #else 4704 # define sqlite3TriggersExist(B,C,D,E,F) 0 4705 # define sqlite3DeleteTrigger(A,B) 4706 # define sqlite3DropTriggerPtr(A,B) 4707 # define sqlite3UnlinkAndDeleteTrigger(A,B,C) 4708 # define sqlite3CodeRowTrigger(A,B,C,D,E,F,G,H,I) 4709 # define sqlite3CodeRowTriggerDirect(A,B,C,D,E,F) 4710 # define sqlite3TriggerList(X, Y) 0 4711 # define sqlite3ParseToplevel(p) p 4712 # define sqlite3IsToplevel(p) 1 4713 # define sqlite3TriggerColmask(A,B,C,D,E,F,G) 0 4714 # define sqlite3TriggerStepSrc(A,B) 0 4715 #endif 4716 4717 int sqlite3JoinType(Parse*, Token*, Token*, Token*); 4718 int sqlite3ColumnIndex(Table *pTab, const char *zCol); 4719 void sqlite3SetJoinExpr(Expr*,int); 4720 void sqlite3CreateForeignKey(Parse*, ExprList*, Token*, ExprList*, int); 4721 void sqlite3DeferForeignKey(Parse*, int); 4722 #ifndef SQLITE_OMIT_AUTHORIZATION 4723 void sqlite3AuthRead(Parse*,Expr*,Schema*,SrcList*); 4724 int sqlite3AuthCheck(Parse*,int, const char*, const char*, const char*); 4725 void sqlite3AuthContextPush(Parse*, AuthContext*, const char*); 4726 void sqlite3AuthContextPop(AuthContext*); 4727 int sqlite3AuthReadCol(Parse*, const char *, const char *, int); 4728 #else 4729 # define sqlite3AuthRead(a,b,c,d) 4730 # define sqlite3AuthCheck(a,b,c,d,e) SQLITE_OK 4731 # define sqlite3AuthContextPush(a,b,c) 4732 # define sqlite3AuthContextPop(a) ((void)(a)) 4733 #endif 4734 int sqlite3DbIsNamed(sqlite3 *db, int iDb, const char *zName); 4735 void sqlite3Attach(Parse*, Expr*, Expr*, Expr*); 4736 void sqlite3Detach(Parse*, Expr*); 4737 void sqlite3FixInit(DbFixer*, Parse*, int, const char*, const Token*); 4738 int sqlite3FixSrcList(DbFixer*, SrcList*); 4739 int sqlite3FixSelect(DbFixer*, Select*); 4740 int sqlite3FixExpr(DbFixer*, Expr*); 4741 int sqlite3FixTriggerStep(DbFixer*, TriggerStep*); 4742 int sqlite3RealSameAsInt(double,sqlite3_int64); 4743 void sqlite3Int64ToText(i64,char*); 4744 int sqlite3AtoF(const char *z, double*, int, u8); 4745 int sqlite3GetInt32(const char *, int*); 4746 int sqlite3GetUInt32(const char*, u32*); 4747 int sqlite3Atoi(const char*); 4748 #ifndef SQLITE_OMIT_UTF16 4749 int sqlite3Utf16ByteLen(const void *pData, int nChar); 4750 #endif 4751 int sqlite3Utf8CharLen(const char *pData, int nByte); 4752 u32 sqlite3Utf8Read(const u8**); 4753 LogEst sqlite3LogEst(u64); 4754 LogEst sqlite3LogEstAdd(LogEst,LogEst); 4755 #ifndef SQLITE_OMIT_VIRTUALTABLE 4756 LogEst sqlite3LogEstFromDouble(double); 4757 #endif 4758 #if defined(SQLITE_ENABLE_STMT_SCANSTATUS) || \ 4759 defined(SQLITE_ENABLE_STAT4) || \ 4760 defined(SQLITE_EXPLAIN_ESTIMATED_ROWS) 4761 u64 sqlite3LogEstToInt(LogEst); 4762 #endif 4763 VList *sqlite3VListAdd(sqlite3*,VList*,const char*,int,int); 4764 const char *sqlite3VListNumToName(VList*,int); 4765 int sqlite3VListNameToNum(VList*,const char*,int); 4766 4767 /* 4768 ** Routines to read and write variable-length integers. These used to 4769 ** be defined locally, but now we use the varint routines in the util.c 4770 ** file. 4771 */ 4772 int sqlite3PutVarint(unsigned char*, u64); 4773 u8 sqlite3GetVarint(const unsigned char *, u64 *); 4774 u8 sqlite3GetVarint32(const unsigned char *, u32 *); 4775 int sqlite3VarintLen(u64 v); 4776 4777 /* 4778 ** The common case is for a varint to be a single byte. They following 4779 ** macros handle the common case without a procedure call, but then call 4780 ** the procedure for larger varints. 4781 */ 4782 #define getVarint32(A,B) \ 4783 (u8)((*(A)<(u8)0x80)?((B)=(u32)*(A)),1:sqlite3GetVarint32((A),(u32 *)&(B))) 4784 #define getVarint32NR(A,B) \ 4785 B=(u32)*(A);if(B>=0x80)sqlite3GetVarint32((A),(u32*)&(B)) 4786 #define putVarint32(A,B) \ 4787 (u8)(((u32)(B)<(u32)0x80)?(*(A)=(unsigned char)(B)),1:\ 4788 sqlite3PutVarint((A),(B))) 4789 #define getVarint sqlite3GetVarint 4790 #define putVarint sqlite3PutVarint 4791 4792 4793 const char *sqlite3IndexAffinityStr(sqlite3*, Index*); 4794 void sqlite3TableAffinity(Vdbe*, Table*, int); 4795 char sqlite3CompareAffinity(const Expr *pExpr, char aff2); 4796 int sqlite3IndexAffinityOk(const Expr *pExpr, char idx_affinity); 4797 char sqlite3TableColumnAffinity(const Table*,int); 4798 char sqlite3ExprAffinity(const Expr *pExpr); 4799 int sqlite3Atoi64(const char*, i64*, int, u8); 4800 int sqlite3DecOrHexToI64(const char*, i64*); 4801 void sqlite3ErrorWithMsg(sqlite3*, int, const char*,...); 4802 void sqlite3Error(sqlite3*,int); 4803 void sqlite3ErrorClear(sqlite3*); 4804 void sqlite3SystemError(sqlite3*,int); 4805 void *sqlite3HexToBlob(sqlite3*, const char *z, int n); 4806 u8 sqlite3HexToInt(int h); 4807 int sqlite3TwoPartName(Parse *, Token *, Token *, Token **); 4808 4809 #if defined(SQLITE_NEED_ERR_NAME) 4810 const char *sqlite3ErrName(int); 4811 #endif 4812 4813 #ifndef SQLITE_OMIT_DESERIALIZE 4814 int sqlite3MemdbInit(void); 4815 #endif 4816 4817 const char *sqlite3ErrStr(int); 4818 int sqlite3ReadSchema(Parse *pParse); 4819 CollSeq *sqlite3FindCollSeq(sqlite3*,u8 enc, const char*,int); 4820 int sqlite3IsBinary(const CollSeq*); 4821 CollSeq *sqlite3LocateCollSeq(Parse *pParse, const char*zName); 4822 void sqlite3SetTextEncoding(sqlite3 *db, u8); 4823 CollSeq *sqlite3ExprCollSeq(Parse *pParse, const Expr *pExpr); 4824 CollSeq *sqlite3ExprNNCollSeq(Parse *pParse, const Expr *pExpr); 4825 int sqlite3ExprCollSeqMatch(Parse*,const Expr*,const Expr*); 4826 Expr *sqlite3ExprAddCollateToken(const Parse *pParse, Expr*, const Token*, int); 4827 Expr *sqlite3ExprAddCollateString(const Parse*,Expr*,const char*); 4828 Expr *sqlite3ExprSkipCollate(Expr*); 4829 Expr *sqlite3ExprSkipCollateAndLikely(Expr*); 4830 int sqlite3CheckCollSeq(Parse *, CollSeq *); 4831 int sqlite3WritableSchema(sqlite3*); 4832 int sqlite3CheckObjectName(Parse*, const char*,const char*,const char*); 4833 void sqlite3VdbeSetChanges(sqlite3 *, i64); 4834 int sqlite3AddInt64(i64*,i64); 4835 int sqlite3SubInt64(i64*,i64); 4836 int sqlite3MulInt64(i64*,i64); 4837 int sqlite3AbsInt32(int); 4838 #ifdef SQLITE_ENABLE_8_3_NAMES 4839 void sqlite3FileSuffix3(const char*, char*); 4840 #else 4841 # define sqlite3FileSuffix3(X,Y) 4842 #endif 4843 u8 sqlite3GetBoolean(const char *z,u8); 4844 4845 const void *sqlite3ValueText(sqlite3_value*, u8); 4846 int sqlite3ValueBytes(sqlite3_value*, u8); 4847 void sqlite3ValueSetStr(sqlite3_value*, int, const void *,u8, 4848 void(*)(void*)); 4849 void sqlite3ValueSetNull(sqlite3_value*); 4850 void sqlite3ValueFree(sqlite3_value*); 4851 #ifndef SQLITE_UNTESTABLE 4852 void sqlite3ResultIntReal(sqlite3_context*); 4853 #endif 4854 sqlite3_value *sqlite3ValueNew(sqlite3 *); 4855 #ifndef SQLITE_OMIT_UTF16 4856 char *sqlite3Utf16to8(sqlite3 *, const void*, int, u8); 4857 #endif 4858 int sqlite3ValueFromExpr(sqlite3 *, const Expr *, u8, u8, sqlite3_value **); 4859 void sqlite3ValueApplyAffinity(sqlite3_value *, u8, u8); 4860 #ifndef SQLITE_AMALGAMATION 4861 extern const unsigned char sqlite3OpcodeProperty[]; 4862 extern const char sqlite3StrBINARY[]; 4863 extern const unsigned char sqlite3StdTypeLen[]; 4864 extern const char sqlite3StdTypeAffinity[]; 4865 extern const char sqlite3StdTypeMap[]; 4866 extern const char *sqlite3StdType[]; 4867 extern const unsigned char sqlite3UpperToLower[]; 4868 extern const unsigned char *sqlite3aLTb; 4869 extern const unsigned char *sqlite3aEQb; 4870 extern const unsigned char *sqlite3aGTb; 4871 extern const unsigned char sqlite3CtypeMap[]; 4872 extern SQLITE_WSD struct Sqlite3Config sqlite3Config; 4873 extern FuncDefHash sqlite3BuiltinFunctions; 4874 #ifndef SQLITE_OMIT_WSD 4875 extern int sqlite3PendingByte; 4876 #endif 4877 #endif /* SQLITE_AMALGAMATION */ 4878 #ifdef VDBE_PROFILE 4879 extern sqlite3_uint64 sqlite3NProfileCnt; 4880 #endif 4881 void sqlite3RootPageMoved(sqlite3*, int, Pgno, Pgno); 4882 void sqlite3Reindex(Parse*, Token*, Token*); 4883 void sqlite3AlterFunctions(void); 4884 void sqlite3AlterRenameTable(Parse*, SrcList*, Token*); 4885 void sqlite3AlterRenameColumn(Parse*, SrcList*, Token*, Token*); 4886 int sqlite3GetToken(const unsigned char *, int *); 4887 void sqlite3NestedParse(Parse*, const char*, ...); 4888 void sqlite3ExpirePreparedStatements(sqlite3*, int); 4889 void sqlite3CodeRhsOfIN(Parse*, Expr*, int); 4890 int sqlite3CodeSubselect(Parse*, Expr*); 4891 void sqlite3SelectPrep(Parse*, Select*, NameContext*); 4892 int sqlite3ExpandSubquery(Parse*, SrcItem*); 4893 void sqlite3SelectWrongNumTermsError(Parse *pParse, Select *p); 4894 int sqlite3MatchEName( 4895 const struct ExprList_item*, 4896 const char*, 4897 const char*, 4898 const char* 4899 ); 4900 Bitmask sqlite3ExprColUsed(Expr*); 4901 u8 sqlite3StrIHash(const char*); 4902 int sqlite3ResolveExprNames(NameContext*, Expr*); 4903 int sqlite3ResolveExprListNames(NameContext*, ExprList*); 4904 void sqlite3ResolveSelectNames(Parse*, Select*, NameContext*); 4905 int sqlite3ResolveSelfReference(Parse*,Table*,int,Expr*,ExprList*); 4906 int sqlite3ResolveOrderGroupBy(Parse*, Select*, ExprList*, const char*); 4907 void sqlite3ColumnDefault(Vdbe *, Table *, int, int); 4908 void sqlite3AlterFinishAddColumn(Parse *, Token *); 4909 void sqlite3AlterBeginAddColumn(Parse *, SrcList *); 4910 void sqlite3AlterDropColumn(Parse*, SrcList*, const Token*); 4911 const void *sqlite3RenameTokenMap(Parse*, const void*, const Token*); 4912 void sqlite3RenameTokenRemap(Parse*, const void *pTo, const void *pFrom); 4913 void sqlite3RenameExprUnmap(Parse*, Expr*); 4914 void sqlite3RenameExprlistUnmap(Parse*, ExprList*); 4915 CollSeq *sqlite3GetCollSeq(Parse*, u8, CollSeq *, const char*); 4916 char sqlite3AffinityType(const char*, Column*); 4917 void sqlite3Analyze(Parse*, Token*, Token*); 4918 int sqlite3InvokeBusyHandler(BusyHandler*); 4919 int sqlite3FindDb(sqlite3*, Token*); 4920 int sqlite3FindDbName(sqlite3 *, const char *); 4921 int sqlite3AnalysisLoad(sqlite3*,int iDB); 4922 void sqlite3DeleteIndexSamples(sqlite3*,Index*); 4923 void sqlite3DefaultRowEst(Index*); 4924 void sqlite3RegisterLikeFunctions(sqlite3*, int); 4925 int sqlite3IsLikeFunction(sqlite3*,Expr*,int*,char*); 4926 void sqlite3SchemaClear(void *); 4927 Schema *sqlite3SchemaGet(sqlite3 *, Btree *); 4928 int sqlite3SchemaToIndex(sqlite3 *db, Schema *); 4929 KeyInfo *sqlite3KeyInfoAlloc(sqlite3*,int,int); 4930 void sqlite3KeyInfoUnref(KeyInfo*); 4931 KeyInfo *sqlite3KeyInfoRef(KeyInfo*); 4932 KeyInfo *sqlite3KeyInfoOfIndex(Parse*, Index*); 4933 KeyInfo *sqlite3KeyInfoFromExprList(Parse*, ExprList*, int, int); 4934 const char *sqlite3SelectOpName(int); 4935 int sqlite3HasExplicitNulls(Parse*, ExprList*); 4936 4937 #ifdef SQLITE_DEBUG 4938 int sqlite3KeyInfoIsWriteable(KeyInfo*); 4939 #endif 4940 int sqlite3CreateFunc(sqlite3 *, const char *, int, int, void *, 4941 void (*)(sqlite3_context*,int,sqlite3_value **), 4942 void (*)(sqlite3_context*,int,sqlite3_value **), 4943 void (*)(sqlite3_context*), 4944 void (*)(sqlite3_context*), 4945 void (*)(sqlite3_context*,int,sqlite3_value **), 4946 FuncDestructor *pDestructor 4947 ); 4948 void sqlite3NoopDestructor(void*); 4949 void sqlite3OomFault(sqlite3*); 4950 void sqlite3OomClear(sqlite3*); 4951 int sqlite3ApiExit(sqlite3 *db, int); 4952 int sqlite3OpenTempDatabase(Parse *); 4953 4954 void sqlite3StrAccumInit(StrAccum*, sqlite3*, char*, int, int); 4955 char *sqlite3StrAccumFinish(StrAccum*); 4956 void sqlite3StrAccumSetError(StrAccum*, u8); 4957 void sqlite3ResultStrAccum(sqlite3_context*,StrAccum*); 4958 void sqlite3SelectDestInit(SelectDest*,int,int); 4959 Expr *sqlite3CreateColumnExpr(sqlite3 *, SrcList *, int, int); 4960 4961 void sqlite3BackupRestart(sqlite3_backup *); 4962 void sqlite3BackupUpdate(sqlite3_backup *, Pgno, const u8 *); 4963 4964 #ifndef SQLITE_OMIT_SUBQUERY 4965 int sqlite3ExprCheckIN(Parse*, Expr*); 4966 #else 4967 # define sqlite3ExprCheckIN(x,y) SQLITE_OK 4968 #endif 4969 4970 #ifdef SQLITE_ENABLE_STAT4 4971 int sqlite3Stat4ProbeSetValue( 4972 Parse*,Index*,UnpackedRecord**,Expr*,int,int,int*); 4973 int sqlite3Stat4ValueFromExpr(Parse*, Expr*, u8, sqlite3_value**); 4974 void sqlite3Stat4ProbeFree(UnpackedRecord*); 4975 int sqlite3Stat4Column(sqlite3*, const void*, int, int, sqlite3_value**); 4976 char sqlite3IndexColumnAffinity(sqlite3*, Index*, int); 4977 #endif 4978 4979 /* 4980 ** The interface to the LEMON-generated parser 4981 */ 4982 #ifndef SQLITE_AMALGAMATION 4983 void *sqlite3ParserAlloc(void*(*)(u64), Parse*); 4984 void sqlite3ParserFree(void*, void(*)(void*)); 4985 #endif 4986 void sqlite3Parser(void*, int, Token); 4987 int sqlite3ParserFallback(int); 4988 #ifdef YYTRACKMAXSTACKDEPTH 4989 int sqlite3ParserStackPeak(void*); 4990 #endif 4991 4992 void sqlite3AutoLoadExtensions(sqlite3*); 4993 #ifndef SQLITE_OMIT_LOAD_EXTENSION 4994 void sqlite3CloseExtensions(sqlite3*); 4995 #else 4996 # define sqlite3CloseExtensions(X) 4997 #endif 4998 4999 #ifndef SQLITE_OMIT_SHARED_CACHE 5000 void sqlite3TableLock(Parse *, int, Pgno, u8, const char *); 5001 #else 5002 #define sqlite3TableLock(v,w,x,y,z) 5003 #endif 5004 5005 #ifdef SQLITE_TEST 5006 int sqlite3Utf8To8(unsigned char*); 5007 #endif 5008 5009 #ifdef SQLITE_OMIT_VIRTUALTABLE 5010 # define sqlite3VtabClear(D,T) 5011 # define sqlite3VtabSync(X,Y) SQLITE_OK 5012 # define sqlite3VtabRollback(X) 5013 # define sqlite3VtabCommit(X) 5014 # define sqlite3VtabInSync(db) 0 5015 # define sqlite3VtabLock(X) 5016 # define sqlite3VtabUnlock(X) 5017 # define sqlite3VtabModuleUnref(D,X) 5018 # define sqlite3VtabUnlockList(X) 5019 # define sqlite3VtabSavepoint(X, Y, Z) SQLITE_OK 5020 # define sqlite3GetVTable(X,Y) ((VTable*)0) 5021 #else 5022 void sqlite3VtabClear(sqlite3 *db, Table*); 5023 void sqlite3VtabDisconnect(sqlite3 *db, Table *p); 5024 int sqlite3VtabSync(sqlite3 *db, Vdbe*); 5025 int sqlite3VtabRollback(sqlite3 *db); 5026 int sqlite3VtabCommit(sqlite3 *db); 5027 void sqlite3VtabLock(VTable *); 5028 void sqlite3VtabUnlock(VTable *); 5029 void sqlite3VtabModuleUnref(sqlite3*,Module*); 5030 void sqlite3VtabUnlockList(sqlite3*); 5031 int sqlite3VtabSavepoint(sqlite3 *, int, int); 5032 void sqlite3VtabImportErrmsg(Vdbe*, sqlite3_vtab*); 5033 VTable *sqlite3GetVTable(sqlite3*, Table*); 5034 Module *sqlite3VtabCreateModule( 5035 sqlite3*, 5036 const char*, 5037 const sqlite3_module*, 5038 void*, 5039 void(*)(void*) 5040 ); 5041 # define sqlite3VtabInSync(db) ((db)->nVTrans>0 && (db)->aVTrans==0) 5042 #endif 5043 int sqlite3ReadOnlyShadowTables(sqlite3 *db); 5044 #ifndef SQLITE_OMIT_VIRTUALTABLE 5045 int sqlite3ShadowTableName(sqlite3 *db, const char *zName); 5046 int sqlite3IsShadowTableOf(sqlite3*,Table*,const char*); 5047 #else 5048 # define sqlite3ShadowTableName(A,B) 0 5049 # define sqlite3IsShadowTableOf(A,B,C) 0 5050 #endif 5051 int sqlite3VtabEponymousTableInit(Parse*,Module*); 5052 void sqlite3VtabEponymousTableClear(sqlite3*,Module*); 5053 void sqlite3VtabMakeWritable(Parse*,Table*); 5054 void sqlite3VtabBeginParse(Parse*, Token*, Token*, Token*, int); 5055 void sqlite3VtabFinishParse(Parse*, Token*); 5056 void sqlite3VtabArgInit(Parse*); 5057 void sqlite3VtabArgExtend(Parse*, Token*); 5058 int sqlite3VtabCallCreate(sqlite3*, int, const char *, char **); 5059 int sqlite3VtabCallConnect(Parse*, Table*); 5060 int sqlite3VtabCallDestroy(sqlite3*, int, const char *); 5061 int sqlite3VtabBegin(sqlite3 *, VTable *); 5062 FuncDef *sqlite3VtabOverloadFunction(sqlite3 *,FuncDef*, int nArg, Expr*); 5063 sqlite3_int64 sqlite3StmtCurrentTime(sqlite3_context*); 5064 int sqlite3VdbeParameterIndex(Vdbe*, const char*, int); 5065 int sqlite3TransferBindings(sqlite3_stmt *, sqlite3_stmt *); 5066 void sqlite3ParserReset(Parse*); 5067 void *sqlite3ParserAddCleanup(Parse*,void(*)(sqlite3*,void*),void*); 5068 #ifdef SQLITE_ENABLE_NORMALIZE 5069 char *sqlite3Normalize(Vdbe*, const char*); 5070 #endif 5071 int sqlite3Reprepare(Vdbe*); 5072 void sqlite3ExprListCheckLength(Parse*, ExprList*, const char*); 5073 CollSeq *sqlite3ExprCompareCollSeq(Parse*,const Expr*); 5074 CollSeq *sqlite3BinaryCompareCollSeq(Parse *, const Expr*, const Expr*); 5075 int sqlite3TempInMemory(const sqlite3*); 5076 const char *sqlite3JournalModename(int); 5077 #ifndef SQLITE_OMIT_WAL 5078 int sqlite3Checkpoint(sqlite3*, int, int, int*, int*); 5079 int sqlite3WalDefaultHook(void*,sqlite3*,const char*,int); 5080 #endif 5081 #ifndef SQLITE_OMIT_CTE 5082 Cte *sqlite3CteNew(Parse*,Token*,ExprList*,Select*,u8); 5083 void sqlite3CteDelete(sqlite3*,Cte*); 5084 With *sqlite3WithAdd(Parse*,With*,Cte*); 5085 void sqlite3WithDelete(sqlite3*,With*); 5086 With *sqlite3WithPush(Parse*, With*, u8); 5087 #else 5088 # define sqlite3CteNew(P,T,E,S) ((void*)0) 5089 # define sqlite3CteDelete(D,C) 5090 # define sqlite3CteWithAdd(P,W,C) ((void*)0) 5091 # define sqlite3WithDelete(x,y) 5092 # define sqlite3WithPush(x,y,z) 5093 #endif 5094 #ifndef SQLITE_OMIT_UPSERT 5095 Upsert *sqlite3UpsertNew(sqlite3*,ExprList*,Expr*,ExprList*,Expr*,Upsert*); 5096 void sqlite3UpsertDelete(sqlite3*,Upsert*); 5097 Upsert *sqlite3UpsertDup(sqlite3*,Upsert*); 5098 int sqlite3UpsertAnalyzeTarget(Parse*,SrcList*,Upsert*); 5099 void sqlite3UpsertDoUpdate(Parse*,Upsert*,Table*,Index*,int); 5100 Upsert *sqlite3UpsertOfIndex(Upsert*,Index*); 5101 int sqlite3UpsertNextIsIPK(Upsert*); 5102 #else 5103 #define sqlite3UpsertNew(u,v,w,x,y,z) ((Upsert*)0) 5104 #define sqlite3UpsertDelete(x,y) 5105 #define sqlite3UpsertDup(x,y) ((Upsert*)0) 5106 #define sqlite3UpsertOfIndex(x,y) ((Upsert*)0) 5107 #define sqlite3UpsertNextIsIPK(x) 0 5108 #endif 5109 5110 5111 /* Declarations for functions in fkey.c. All of these are replaced by 5112 ** no-op macros if OMIT_FOREIGN_KEY is defined. In this case no foreign 5113 ** key functionality is available. If OMIT_TRIGGER is defined but 5114 ** OMIT_FOREIGN_KEY is not, only some of the functions are no-oped. In 5115 ** this case foreign keys are parsed, but no other functionality is 5116 ** provided (enforcement of FK constraints requires the triggers sub-system). 5117 */ 5118 #if !defined(SQLITE_OMIT_FOREIGN_KEY) && !defined(SQLITE_OMIT_TRIGGER) 5119 void sqlite3FkCheck(Parse*, Table*, int, int, int*, int); 5120 void sqlite3FkDropTable(Parse*, SrcList *, Table*); 5121 void sqlite3FkActions(Parse*, Table*, ExprList*, int, int*, int); 5122 int sqlite3FkRequired(Parse*, Table*, int*, int); 5123 u32 sqlite3FkOldmask(Parse*, Table*); 5124 FKey *sqlite3FkReferences(Table *); 5125 #else 5126 #define sqlite3FkActions(a,b,c,d,e,f) 5127 #define sqlite3FkCheck(a,b,c,d,e,f) 5128 #define sqlite3FkDropTable(a,b,c) 5129 #define sqlite3FkOldmask(a,b) 0 5130 #define sqlite3FkRequired(a,b,c,d) 0 5131 #define sqlite3FkReferences(a) 0 5132 #endif 5133 #ifndef SQLITE_OMIT_FOREIGN_KEY 5134 void sqlite3FkDelete(sqlite3 *, Table*); 5135 int sqlite3FkLocateIndex(Parse*,Table*,FKey*,Index**,int**); 5136 #else 5137 #define sqlite3FkDelete(a,b) 5138 #define sqlite3FkLocateIndex(a,b,c,d,e) 5139 #endif 5140 5141 5142 /* 5143 ** Available fault injectors. Should be numbered beginning with 0. 5144 */ 5145 #define SQLITE_FAULTINJECTOR_MALLOC 0 5146 #define SQLITE_FAULTINJECTOR_COUNT 1 5147 5148 /* 5149 ** The interface to the code in fault.c used for identifying "benign" 5150 ** malloc failures. This is only present if SQLITE_UNTESTABLE 5151 ** is not defined. 5152 */ 5153 #ifndef SQLITE_UNTESTABLE 5154 void sqlite3BeginBenignMalloc(void); 5155 void sqlite3EndBenignMalloc(void); 5156 #else 5157 #define sqlite3BeginBenignMalloc() 5158 #define sqlite3EndBenignMalloc() 5159 #endif 5160 5161 /* 5162 ** Allowed return values from sqlite3FindInIndex() 5163 */ 5164 #define IN_INDEX_ROWID 1 /* Search the rowid of the table */ 5165 #define IN_INDEX_EPH 2 /* Search an ephemeral b-tree */ 5166 #define IN_INDEX_INDEX_ASC 3 /* Existing index ASCENDING */ 5167 #define IN_INDEX_INDEX_DESC 4 /* Existing index DESCENDING */ 5168 #define IN_INDEX_NOOP 5 /* No table available. Use comparisons */ 5169 /* 5170 ** Allowed flags for the 3rd parameter to sqlite3FindInIndex(). 5171 */ 5172 #define IN_INDEX_NOOP_OK 0x0001 /* OK to return IN_INDEX_NOOP */ 5173 #define IN_INDEX_MEMBERSHIP 0x0002 /* IN operator used for membership test */ 5174 #define IN_INDEX_LOOP 0x0004 /* IN operator used as a loop */ 5175 int sqlite3FindInIndex(Parse *, Expr *, u32, int*, int*, int*); 5176 5177 int sqlite3JournalOpen(sqlite3_vfs *, const char *, sqlite3_file *, int, int); 5178 int sqlite3JournalSize(sqlite3_vfs *); 5179 #if defined(SQLITE_ENABLE_ATOMIC_WRITE) \ 5180 || defined(SQLITE_ENABLE_BATCH_ATOMIC_WRITE) 5181 int sqlite3JournalCreate(sqlite3_file *); 5182 #endif 5183 5184 int sqlite3JournalIsInMemory(sqlite3_file *p); 5185 void sqlite3MemJournalOpen(sqlite3_file *); 5186 5187 void sqlite3ExprSetHeightAndFlags(Parse *pParse, Expr *p); 5188 #if SQLITE_MAX_EXPR_DEPTH>0 5189 int sqlite3SelectExprHeight(const Select *); 5190 int sqlite3ExprCheckHeight(Parse*, int); 5191 #else 5192 #define sqlite3SelectExprHeight(x) 0 5193 #define sqlite3ExprCheckHeight(x,y) 5194 #endif 5195 5196 u32 sqlite3Get4byte(const u8*); 5197 void sqlite3Put4byte(u8*, u32); 5198 5199 #ifdef SQLITE_ENABLE_UNLOCK_NOTIFY 5200 void sqlite3ConnectionBlocked(sqlite3 *, sqlite3 *); 5201 void sqlite3ConnectionUnlocked(sqlite3 *db); 5202 void sqlite3ConnectionClosed(sqlite3 *db); 5203 #else 5204 #define sqlite3ConnectionBlocked(x,y) 5205 #define sqlite3ConnectionUnlocked(x) 5206 #define sqlite3ConnectionClosed(x) 5207 #endif 5208 5209 #ifdef SQLITE_DEBUG 5210 void sqlite3ParserTrace(FILE*, char *); 5211 #endif 5212 #if defined(YYCOVERAGE) 5213 int sqlite3ParserCoverage(FILE*); 5214 #endif 5215 5216 /* 5217 ** If the SQLITE_ENABLE IOTRACE exists then the global variable 5218 ** sqlite3IoTrace is a pointer to a printf-like routine used to 5219 ** print I/O tracing messages. 5220 */ 5221 #ifdef SQLITE_ENABLE_IOTRACE 5222 # define IOTRACE(A) if( sqlite3IoTrace ){ sqlite3IoTrace A; } 5223 void sqlite3VdbeIOTraceSql(Vdbe*); 5224 SQLITE_API SQLITE_EXTERN void (SQLITE_CDECL *sqlite3IoTrace)(const char*,...); 5225 #else 5226 # define IOTRACE(A) 5227 # define sqlite3VdbeIOTraceSql(X) 5228 #endif 5229 5230 /* 5231 ** These routines are available for the mem2.c debugging memory allocator 5232 ** only. They are used to verify that different "types" of memory 5233 ** allocations are properly tracked by the system. 5234 ** 5235 ** sqlite3MemdebugSetType() sets the "type" of an allocation to one of 5236 ** the MEMTYPE_* macros defined below. The type must be a bitmask with 5237 ** a single bit set. 5238 ** 5239 ** sqlite3MemdebugHasType() returns true if any of the bits in its second 5240 ** argument match the type set by the previous sqlite3MemdebugSetType(). 5241 ** sqlite3MemdebugHasType() is intended for use inside assert() statements. 5242 ** 5243 ** sqlite3MemdebugNoType() returns true if none of the bits in its second 5244 ** argument match the type set by the previous sqlite3MemdebugSetType(). 5245 ** 5246 ** Perhaps the most important point is the difference between MEMTYPE_HEAP 5247 ** and MEMTYPE_LOOKASIDE. If an allocation is MEMTYPE_LOOKASIDE, that means 5248 ** it might have been allocated by lookaside, except the allocation was 5249 ** too large or lookaside was already full. It is important to verify 5250 ** that allocations that might have been satisfied by lookaside are not 5251 ** passed back to non-lookaside free() routines. Asserts such as the 5252 ** example above are placed on the non-lookaside free() routines to verify 5253 ** this constraint. 5254 ** 5255 ** All of this is no-op for a production build. It only comes into 5256 ** play when the SQLITE_MEMDEBUG compile-time option is used. 5257 */ 5258 #ifdef SQLITE_MEMDEBUG 5259 void sqlite3MemdebugSetType(void*,u8); 5260 int sqlite3MemdebugHasType(const void*,u8); 5261 int sqlite3MemdebugNoType(const void*,u8); 5262 #else 5263 # define sqlite3MemdebugSetType(X,Y) /* no-op */ 5264 # define sqlite3MemdebugHasType(X,Y) 1 5265 # define sqlite3MemdebugNoType(X,Y) 1 5266 #endif 5267 #define MEMTYPE_HEAP 0x01 /* General heap allocations */ 5268 #define MEMTYPE_LOOKASIDE 0x02 /* Heap that might have been lookaside */ 5269 #define MEMTYPE_PCACHE 0x04 /* Page cache allocations */ 5270 5271 /* 5272 ** Threading interface 5273 */ 5274 #if SQLITE_MAX_WORKER_THREADS>0 5275 int sqlite3ThreadCreate(SQLiteThread**,void*(*)(void*),void*); 5276 int sqlite3ThreadJoin(SQLiteThread*, void**); 5277 #endif 5278 5279 #if defined(SQLITE_ENABLE_DBPAGE_VTAB) || defined(SQLITE_TEST) 5280 int sqlite3DbpageRegister(sqlite3*); 5281 #endif 5282 #if defined(SQLITE_ENABLE_DBSTAT_VTAB) || defined(SQLITE_TEST) 5283 int sqlite3DbstatRegister(sqlite3*); 5284 #endif 5285 5286 int sqlite3ExprVectorSize(const Expr *pExpr); 5287 int sqlite3ExprIsVector(const Expr *pExpr); 5288 Expr *sqlite3VectorFieldSubexpr(Expr*, int); 5289 Expr *sqlite3ExprForVectorField(Parse*,Expr*,int,int); 5290 void sqlite3VectorErrorMsg(Parse*, Expr*); 5291 5292 #ifndef SQLITE_OMIT_COMPILEOPTION_DIAGS 5293 const char **sqlite3CompileOptions(int *pnOpt); 5294 #endif 5295 5296 #endif /* SQLITEINT_H */ 5297