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 /* The public SQLite interface. The _FILE_OFFSET_BITS macro must appear 185 ** first in QNX. Also, the _USE_32BIT_TIME_T macro must appear first for 186 ** MinGW. 187 */ 188 #include "sqlite3.h" 189 190 /* 191 ** Include the configuration header output by 'configure' if we're using the 192 ** autoconf-based build 193 */ 194 #if defined(_HAVE_SQLITE_CONFIG_H) && !defined(SQLITECONFIG_H) 195 #include "config.h" 196 #define SQLITECONFIG_H 1 197 #endif 198 199 #include "sqliteLimit.h" 200 201 /* Disable nuisance warnings on Borland compilers */ 202 #if defined(__BORLANDC__) 203 #pragma warn -rch /* unreachable code */ 204 #pragma warn -ccc /* Condition is always true or false */ 205 #pragma warn -aus /* Assigned value is never used */ 206 #pragma warn -csu /* Comparing signed and unsigned */ 207 #pragma warn -spa /* Suspicious pointer arithmetic */ 208 #endif 209 210 /* 211 ** WAL mode depends on atomic aligned 32-bit loads and stores in a few 212 ** places. The following macros try to make this explicit. 213 */ 214 #ifndef __has_extension 215 # define __has_extension(x) 0 /* compatibility with non-clang compilers */ 216 #endif 217 #if GCC_VERSION>=4007000 || \ 218 (__has_extension(c_atomic) && __has_extension(c_atomic_store_n)) 219 # define AtomicLoad(PTR) __atomic_load_n((PTR),__ATOMIC_RELAXED) 220 # define AtomicStore(PTR,VAL) __atomic_store_n((PTR),(VAL),__ATOMIC_RELAXED) 221 #else 222 # define AtomicLoad(PTR) (*(PTR)) 223 # define AtomicStore(PTR,VAL) (*(PTR) = (VAL)) 224 #endif 225 226 /* 227 ** Include standard header files as necessary 228 */ 229 #ifdef HAVE_STDINT_H 230 #include <stdint.h> 231 #endif 232 #ifdef HAVE_INTTYPES_H 233 #include <inttypes.h> 234 #endif 235 236 /* 237 ** The following macros are used to cast pointers to integers and 238 ** integers to pointers. The way you do this varies from one compiler 239 ** to the next, so we have developed the following set of #if statements 240 ** to generate appropriate macros for a wide range of compilers. 241 ** 242 ** The correct "ANSI" way to do this is to use the intptr_t type. 243 ** Unfortunately, that typedef is not available on all compilers, or 244 ** if it is available, it requires an #include of specific headers 245 ** that vary from one machine to the next. 246 ** 247 ** Ticket #3860: The llvm-gcc-4.2 compiler from Apple chokes on 248 ** the ((void*)&((char*)0)[X]) construct. But MSVC chokes on ((void*)(X)). 249 ** So we have to define the macros in different ways depending on the 250 ** compiler. 251 */ 252 #if defined(HAVE_STDINT_H) /* Use this case if we have ANSI headers */ 253 # define SQLITE_INT_TO_PTR(X) ((void*)(intptr_t)(X)) 254 # define SQLITE_PTR_TO_INT(X) ((int)(intptr_t)(X)) 255 #elif defined(__PTRDIFF_TYPE__) /* This case should work for GCC */ 256 # define SQLITE_INT_TO_PTR(X) ((void*)(__PTRDIFF_TYPE__)(X)) 257 # define SQLITE_PTR_TO_INT(X) ((int)(__PTRDIFF_TYPE__)(X)) 258 #elif !defined(__GNUC__) /* Works for compilers other than LLVM */ 259 # define SQLITE_INT_TO_PTR(X) ((void*)&((char*)0)[X]) 260 # define SQLITE_PTR_TO_INT(X) ((int)(((char*)X)-(char*)0)) 261 #else /* Generates a warning - but it always works */ 262 # define SQLITE_INT_TO_PTR(X) ((void*)(X)) 263 # define SQLITE_PTR_TO_INT(X) ((int)(X)) 264 #endif 265 266 /* 267 ** A macro to hint to the compiler that a function should not be 268 ** inlined. 269 */ 270 #if defined(__GNUC__) 271 # define SQLITE_NOINLINE __attribute__((noinline)) 272 #elif defined(_MSC_VER) && _MSC_VER>=1310 273 # define SQLITE_NOINLINE __declspec(noinline) 274 #else 275 # define SQLITE_NOINLINE 276 #endif 277 278 /* 279 ** Make sure that the compiler intrinsics we desire are enabled when 280 ** compiling with an appropriate version of MSVC unless prevented by 281 ** the SQLITE_DISABLE_INTRINSIC define. 282 */ 283 #if !defined(SQLITE_DISABLE_INTRINSIC) 284 # if defined(_MSC_VER) && _MSC_VER>=1400 285 # if !defined(_WIN32_WCE) 286 # include <intrin.h> 287 # pragma intrinsic(_byteswap_ushort) 288 # pragma intrinsic(_byteswap_ulong) 289 # pragma intrinsic(_byteswap_uint64) 290 # pragma intrinsic(_ReadWriteBarrier) 291 # else 292 # include <cmnintrin.h> 293 # endif 294 # endif 295 #endif 296 297 /* 298 ** The SQLITE_THREADSAFE macro must be defined as 0, 1, or 2. 299 ** 0 means mutexes are permanently disable and the library is never 300 ** threadsafe. 1 means the library is serialized which is the highest 301 ** level of threadsafety. 2 means the library is multithreaded - multiple 302 ** threads can use SQLite as long as no two threads try to use the same 303 ** database connection at the same time. 304 ** 305 ** Older versions of SQLite used an optional THREADSAFE macro. 306 ** We support that for legacy. 307 ** 308 ** To ensure that the correct value of "THREADSAFE" is reported when querying 309 ** for compile-time options at runtime (e.g. "PRAGMA compile_options"), this 310 ** logic is partially replicated in ctime.c. If it is updated here, it should 311 ** also be updated there. 312 */ 313 #if !defined(SQLITE_THREADSAFE) 314 # if defined(THREADSAFE) 315 # define SQLITE_THREADSAFE THREADSAFE 316 # else 317 # define SQLITE_THREADSAFE 1 /* IMP: R-07272-22309 */ 318 # endif 319 #endif 320 321 /* 322 ** Powersafe overwrite is on by default. But can be turned off using 323 ** the -DSQLITE_POWERSAFE_OVERWRITE=0 command-line option. 324 */ 325 #ifndef SQLITE_POWERSAFE_OVERWRITE 326 # define SQLITE_POWERSAFE_OVERWRITE 1 327 #endif 328 329 /* 330 ** EVIDENCE-OF: R-25715-37072 Memory allocation statistics are enabled by 331 ** default unless SQLite is compiled with SQLITE_DEFAULT_MEMSTATUS=0 in 332 ** which case memory allocation statistics are disabled by default. 333 */ 334 #if !defined(SQLITE_DEFAULT_MEMSTATUS) 335 # define SQLITE_DEFAULT_MEMSTATUS 1 336 #endif 337 338 /* 339 ** Exactly one of the following macros must be defined in order to 340 ** specify which memory allocation subsystem to use. 341 ** 342 ** SQLITE_SYSTEM_MALLOC // Use normal system malloc() 343 ** SQLITE_WIN32_MALLOC // Use Win32 native heap API 344 ** SQLITE_ZERO_MALLOC // Use a stub allocator that always fails 345 ** SQLITE_MEMDEBUG // Debugging version of system malloc() 346 ** 347 ** On Windows, if the SQLITE_WIN32_MALLOC_VALIDATE macro is defined and the 348 ** assert() macro is enabled, each call into the Win32 native heap subsystem 349 ** will cause HeapValidate to be called. If heap validation should fail, an 350 ** assertion will be triggered. 351 ** 352 ** If none of the above are defined, then set SQLITE_SYSTEM_MALLOC as 353 ** the default. 354 */ 355 #if defined(SQLITE_SYSTEM_MALLOC) \ 356 + defined(SQLITE_WIN32_MALLOC) \ 357 + defined(SQLITE_ZERO_MALLOC) \ 358 + defined(SQLITE_MEMDEBUG)>1 359 # error "Two or more of the following compile-time configuration options\ 360 are defined but at most one is allowed:\ 361 SQLITE_SYSTEM_MALLOC, SQLITE_WIN32_MALLOC, SQLITE_MEMDEBUG,\ 362 SQLITE_ZERO_MALLOC" 363 #endif 364 #if defined(SQLITE_SYSTEM_MALLOC) \ 365 + defined(SQLITE_WIN32_MALLOC) \ 366 + defined(SQLITE_ZERO_MALLOC) \ 367 + defined(SQLITE_MEMDEBUG)==0 368 # define SQLITE_SYSTEM_MALLOC 1 369 #endif 370 371 /* 372 ** If SQLITE_MALLOC_SOFT_LIMIT is not zero, then try to keep the 373 ** sizes of memory allocations below this value where possible. 374 */ 375 #if !defined(SQLITE_MALLOC_SOFT_LIMIT) 376 # define SQLITE_MALLOC_SOFT_LIMIT 1024 377 #endif 378 379 /* 380 ** We need to define _XOPEN_SOURCE as follows in order to enable 381 ** recursive mutexes on most Unix systems and fchmod() on OpenBSD. 382 ** But _XOPEN_SOURCE define causes problems for Mac OS X, so omit 383 ** it. 384 */ 385 #if !defined(_XOPEN_SOURCE) && !defined(__DARWIN__) && !defined(__APPLE__) 386 # define _XOPEN_SOURCE 600 387 #endif 388 389 /* 390 ** NDEBUG and SQLITE_DEBUG are opposites. It should always be true that 391 ** defined(NDEBUG)==!defined(SQLITE_DEBUG). If this is not currently true, 392 ** make it true by defining or undefining NDEBUG. 393 ** 394 ** Setting NDEBUG makes the code smaller and faster by disabling the 395 ** assert() statements in the code. So we want the default action 396 ** to be for NDEBUG to be set and NDEBUG to be undefined only if SQLITE_DEBUG 397 ** is set. Thus NDEBUG becomes an opt-in rather than an opt-out 398 ** feature. 399 */ 400 #if !defined(NDEBUG) && !defined(SQLITE_DEBUG) 401 # define NDEBUG 1 402 #endif 403 #if defined(NDEBUG) && defined(SQLITE_DEBUG) 404 # undef NDEBUG 405 #endif 406 407 /* 408 ** Enable SQLITE_ENABLE_EXPLAIN_COMMENTS if SQLITE_DEBUG is turned on. 409 */ 410 #if !defined(SQLITE_ENABLE_EXPLAIN_COMMENTS) && defined(SQLITE_DEBUG) 411 # define SQLITE_ENABLE_EXPLAIN_COMMENTS 1 412 #endif 413 414 /* 415 ** The testcase() macro is used to aid in coverage testing. When 416 ** doing coverage testing, the condition inside the argument to 417 ** testcase() must be evaluated both true and false in order to 418 ** get full branch coverage. The testcase() macro is inserted 419 ** to help ensure adequate test coverage in places where simple 420 ** condition/decision coverage is inadequate. For example, testcase() 421 ** can be used to make sure boundary values are tested. For 422 ** bitmask tests, testcase() can be used to make sure each bit 423 ** is significant and used at least once. On switch statements 424 ** where multiple cases go to the same block of code, testcase() 425 ** can insure that all cases are evaluated. 426 ** 427 */ 428 #ifdef SQLITE_COVERAGE_TEST 429 void sqlite3Coverage(int); 430 # define testcase(X) if( X ){ sqlite3Coverage(__LINE__); } 431 #else 432 # define testcase(X) 433 #endif 434 435 /* 436 ** The TESTONLY macro is used to enclose variable declarations or 437 ** other bits of code that are needed to support the arguments 438 ** within testcase() and assert() macros. 439 */ 440 #if !defined(NDEBUG) || defined(SQLITE_COVERAGE_TEST) 441 # define TESTONLY(X) X 442 #else 443 # define TESTONLY(X) 444 #endif 445 446 /* 447 ** Sometimes we need a small amount of code such as a variable initialization 448 ** to setup for a later assert() statement. We do not want this code to 449 ** appear when assert() is disabled. The following macro is therefore 450 ** used to contain that setup code. The "VVA" acronym stands for 451 ** "Verification, Validation, and Accreditation". In other words, the 452 ** code within VVA_ONLY() will only run during verification processes. 453 */ 454 #ifndef NDEBUG 455 # define VVA_ONLY(X) X 456 #else 457 # define VVA_ONLY(X) 458 #endif 459 460 /* 461 ** The ALWAYS and NEVER macros surround boolean expressions which 462 ** are intended to always be true or false, respectively. Such 463 ** expressions could be omitted from the code completely. But they 464 ** are included in a few cases in order to enhance the resilience 465 ** of SQLite to unexpected behavior - to make the code "self-healing" 466 ** or "ductile" rather than being "brittle" and crashing at the first 467 ** hint of unplanned behavior. 468 ** 469 ** In other words, ALWAYS and NEVER are added for defensive code. 470 ** 471 ** When doing coverage testing ALWAYS and NEVER are hard-coded to 472 ** be true and false so that the unreachable code they specify will 473 ** not be counted as untested code. 474 */ 475 #if defined(SQLITE_COVERAGE_TEST) || defined(SQLITE_MUTATION_TEST) 476 # define ALWAYS(X) (1) 477 # define NEVER(X) (0) 478 #elif !defined(NDEBUG) 479 # define ALWAYS(X) ((X)?1:(assert(0),0)) 480 # define NEVER(X) ((X)?(assert(0),1):0) 481 #else 482 # define ALWAYS(X) (X) 483 # define NEVER(X) (X) 484 #endif 485 486 /* 487 ** The harmless(X) macro indicates that expression X is usually false 488 ** but can be true without causing any problems, but we don't know of 489 ** any way to cause X to be true. 490 ** 491 ** In debugging and testing builds, this macro will abort if X is ever 492 ** true. In this way, developers are alerted to a possible test case 493 ** that causes X to be true. If a harmless macro ever fails, that is 494 ** an opportunity to change the macro into a testcase() and add a new 495 ** test case to the test suite. 496 ** 497 ** For normal production builds, harmless(X) is a no-op, since it does 498 ** not matter whether expression X is true or false. 499 */ 500 #ifdef SQLITE_DEBUG 501 # define harmless(X) assert(!(X)); 502 #else 503 # define harmless(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 ** Return true (non-zero) if the input is an integer that is too large 571 ** to fit in 32-bits. This macro is used inside of various testcase() 572 ** macros to verify that we have tested SQLite for large-file support. 573 */ 574 #define IS_BIG_INT(X) (((X)&~(i64)0xffffffff)!=0) 575 576 /* 577 ** The macro unlikely() is a hint that surrounds a boolean 578 ** expression that is usually false. Macro likely() surrounds 579 ** a boolean expression that is usually true. These hints could, 580 ** in theory, be used by the compiler to generate better code, but 581 ** currently they are just comments for human readers. 582 */ 583 #define likely(X) (X) 584 #define unlikely(X) (X) 585 586 #include "hash.h" 587 #include "parse.h" 588 #include <stdio.h> 589 #include <stdlib.h> 590 #include <string.h> 591 #include <assert.h> 592 #include <stddef.h> 593 594 /* 595 ** Use a macro to replace memcpy() if compiled with SQLITE_INLINE_MEMCPY. 596 ** This allows better measurements of where memcpy() is used when running 597 ** cachegrind. But this macro version of memcpy() is very slow so it 598 ** should not be used in production. This is a performance measurement 599 ** hack only. 600 */ 601 #ifdef SQLITE_INLINE_MEMCPY 602 # define memcpy(D,S,N) {char*xxd=(char*)(D);const char*xxs=(const char*)(S);\ 603 int xxn=(N);while(xxn-->0)*(xxd++)=*(xxs++);} 604 #endif 605 606 /* 607 ** If compiling for a processor that lacks floating point support, 608 ** substitute integer for floating-point 609 */ 610 #ifdef SQLITE_OMIT_FLOATING_POINT 611 # define double sqlite_int64 612 # define float sqlite_int64 613 # define LONGDOUBLE_TYPE sqlite_int64 614 # ifndef SQLITE_BIG_DBL 615 # define SQLITE_BIG_DBL (((sqlite3_int64)1)<<50) 616 # endif 617 # define SQLITE_OMIT_DATETIME_FUNCS 1 618 # define SQLITE_OMIT_TRACE 1 619 # undef SQLITE_MIXED_ENDIAN_64BIT_FLOAT 620 # undef SQLITE_HAVE_ISNAN 621 #endif 622 #ifndef SQLITE_BIG_DBL 623 # define SQLITE_BIG_DBL (1e99) 624 #endif 625 626 /* 627 ** OMIT_TEMPDB is set to 1 if SQLITE_OMIT_TEMPDB is defined, or 0 628 ** afterward. Having this macro allows us to cause the C compiler 629 ** to omit code used by TEMP tables without messy #ifndef statements. 630 */ 631 #ifdef SQLITE_OMIT_TEMPDB 632 #define OMIT_TEMPDB 1 633 #else 634 #define OMIT_TEMPDB 0 635 #endif 636 637 /* 638 ** The "file format" number is an integer that is incremented whenever 639 ** the VDBE-level file format changes. The following macros define the 640 ** the default file format for new databases and the maximum file format 641 ** that the library can read. 642 */ 643 #define SQLITE_MAX_FILE_FORMAT 4 644 #ifndef SQLITE_DEFAULT_FILE_FORMAT 645 # define SQLITE_DEFAULT_FILE_FORMAT 4 646 #endif 647 648 /* 649 ** Determine whether triggers are recursive by default. This can be 650 ** changed at run-time using a pragma. 651 */ 652 #ifndef SQLITE_DEFAULT_RECURSIVE_TRIGGERS 653 # define SQLITE_DEFAULT_RECURSIVE_TRIGGERS 0 654 #endif 655 656 /* 657 ** Provide a default value for SQLITE_TEMP_STORE in case it is not specified 658 ** on the command-line 659 */ 660 #ifndef SQLITE_TEMP_STORE 661 # define SQLITE_TEMP_STORE 1 662 #endif 663 664 /* 665 ** If no value has been provided for SQLITE_MAX_WORKER_THREADS, or if 666 ** SQLITE_TEMP_STORE is set to 3 (never use temporary files), set it 667 ** to zero. 668 */ 669 #if SQLITE_TEMP_STORE==3 || SQLITE_THREADSAFE==0 670 # undef SQLITE_MAX_WORKER_THREADS 671 # define SQLITE_MAX_WORKER_THREADS 0 672 #endif 673 #ifndef SQLITE_MAX_WORKER_THREADS 674 # define SQLITE_MAX_WORKER_THREADS 8 675 #endif 676 #ifndef SQLITE_DEFAULT_WORKER_THREADS 677 # define SQLITE_DEFAULT_WORKER_THREADS 0 678 #endif 679 #if SQLITE_DEFAULT_WORKER_THREADS>SQLITE_MAX_WORKER_THREADS 680 # undef SQLITE_MAX_WORKER_THREADS 681 # define SQLITE_MAX_WORKER_THREADS SQLITE_DEFAULT_WORKER_THREADS 682 #endif 683 684 /* 685 ** The default initial allocation for the pagecache when using separate 686 ** pagecaches for each database connection. A positive number is the 687 ** number of pages. A negative number N translations means that a buffer 688 ** of -1024*N bytes is allocated and used for as many pages as it will hold. 689 ** 690 ** The default value of "20" was choosen to minimize the run-time of the 691 ** speedtest1 test program with options: --shrink-memory --reprepare 692 */ 693 #ifndef SQLITE_DEFAULT_PCACHE_INITSZ 694 # define SQLITE_DEFAULT_PCACHE_INITSZ 20 695 #endif 696 697 /* 698 ** Default value for the SQLITE_CONFIG_SORTERREF_SIZE option. 699 */ 700 #ifndef SQLITE_DEFAULT_SORTERREF_SIZE 701 # define SQLITE_DEFAULT_SORTERREF_SIZE 0x7fffffff 702 #endif 703 704 /* 705 ** The compile-time options SQLITE_MMAP_READWRITE and 706 ** SQLITE_ENABLE_BATCH_ATOMIC_WRITE are not compatible with one another. 707 ** You must choose one or the other (or neither) but not both. 708 */ 709 #if defined(SQLITE_MMAP_READWRITE) && defined(SQLITE_ENABLE_BATCH_ATOMIC_WRITE) 710 #error Cannot use both SQLITE_MMAP_READWRITE and SQLITE_ENABLE_BATCH_ATOMIC_WRITE 711 #endif 712 713 /* 714 ** GCC does not define the offsetof() macro so we'll have to do it 715 ** ourselves. 716 */ 717 #ifndef offsetof 718 #define offsetof(STRUCTURE,FIELD) ((int)((char*)&((STRUCTURE*)0)->FIELD)) 719 #endif 720 721 /* 722 ** Macros to compute minimum and maximum of two numbers. 723 */ 724 #ifndef MIN 725 # define MIN(A,B) ((A)<(B)?(A):(B)) 726 #endif 727 #ifndef MAX 728 # define MAX(A,B) ((A)>(B)?(A):(B)) 729 #endif 730 731 /* 732 ** Swap two objects of type TYPE. 733 */ 734 #define SWAP(TYPE,A,B) {TYPE t=A; A=B; B=t;} 735 736 /* 737 ** Check to see if this machine uses EBCDIC. (Yes, believe it or 738 ** not, there are still machines out there that use EBCDIC.) 739 */ 740 #if 'A' == '\301' 741 # define SQLITE_EBCDIC 1 742 #else 743 # define SQLITE_ASCII 1 744 #endif 745 746 /* 747 ** Integers of known sizes. These typedefs might change for architectures 748 ** where the sizes very. Preprocessor macros are available so that the 749 ** types can be conveniently redefined at compile-type. Like this: 750 ** 751 ** cc '-DUINTPTR_TYPE=long long int' ... 752 */ 753 #ifndef UINT32_TYPE 754 # ifdef HAVE_UINT32_T 755 # define UINT32_TYPE uint32_t 756 # else 757 # define UINT32_TYPE unsigned int 758 # endif 759 #endif 760 #ifndef UINT16_TYPE 761 # ifdef HAVE_UINT16_T 762 # define UINT16_TYPE uint16_t 763 # else 764 # define UINT16_TYPE unsigned short int 765 # endif 766 #endif 767 #ifndef INT16_TYPE 768 # ifdef HAVE_INT16_T 769 # define INT16_TYPE int16_t 770 # else 771 # define INT16_TYPE short int 772 # endif 773 #endif 774 #ifndef UINT8_TYPE 775 # ifdef HAVE_UINT8_T 776 # define UINT8_TYPE uint8_t 777 # else 778 # define UINT8_TYPE unsigned char 779 # endif 780 #endif 781 #ifndef INT8_TYPE 782 # ifdef HAVE_INT8_T 783 # define INT8_TYPE int8_t 784 # else 785 # define INT8_TYPE signed char 786 # endif 787 #endif 788 #ifndef LONGDOUBLE_TYPE 789 # define LONGDOUBLE_TYPE long double 790 #endif 791 typedef sqlite_int64 i64; /* 8-byte signed integer */ 792 typedef sqlite_uint64 u64; /* 8-byte unsigned integer */ 793 typedef UINT32_TYPE u32; /* 4-byte unsigned integer */ 794 typedef UINT16_TYPE u16; /* 2-byte unsigned integer */ 795 typedef INT16_TYPE i16; /* 2-byte signed integer */ 796 typedef UINT8_TYPE u8; /* 1-byte unsigned integer */ 797 typedef INT8_TYPE i8; /* 1-byte signed integer */ 798 799 /* 800 ** SQLITE_MAX_U32 is a u64 constant that is the maximum u64 value 801 ** that can be stored in a u32 without loss of data. The value 802 ** is 0x00000000ffffffff. But because of quirks of some compilers, we 803 ** have to specify the value in the less intuitive manner shown: 804 */ 805 #define SQLITE_MAX_U32 ((((u64)1)<<32)-1) 806 807 /* 808 ** The datatype used to store estimates of the number of rows in a 809 ** table or index. This is an unsigned integer type. For 99.9% of 810 ** the world, a 32-bit integer is sufficient. But a 64-bit integer 811 ** can be used at compile-time if desired. 812 */ 813 #ifdef SQLITE_64BIT_STATS 814 typedef u64 tRowcnt; /* 64-bit only if requested at compile-time */ 815 #else 816 typedef u32 tRowcnt; /* 32-bit is the default */ 817 #endif 818 819 /* 820 ** Estimated quantities used for query planning are stored as 16-bit 821 ** logarithms. For quantity X, the value stored is 10*log2(X). This 822 ** gives a possible range of values of approximately 1.0e986 to 1e-986. 823 ** But the allowed values are "grainy". Not every value is representable. 824 ** For example, quantities 16 and 17 are both represented by a LogEst 825 ** of 40. However, since LogEst quantities are suppose to be estimates, 826 ** not exact values, this imprecision is not a problem. 827 ** 828 ** "LogEst" is short for "Logarithmic Estimate". 829 ** 830 ** Examples: 831 ** 1 -> 0 20 -> 43 10000 -> 132 832 ** 2 -> 10 25 -> 46 25000 -> 146 833 ** 3 -> 16 100 -> 66 1000000 -> 199 834 ** 4 -> 20 1000 -> 99 1048576 -> 200 835 ** 10 -> 33 1024 -> 100 4294967296 -> 320 836 ** 837 ** The LogEst can be negative to indicate fractional values. 838 ** Examples: 839 ** 840 ** 0.5 -> -10 0.1 -> -33 0.0625 -> -40 841 */ 842 typedef INT16_TYPE LogEst; 843 844 /* 845 ** Set the SQLITE_PTRSIZE macro to the number of bytes in a pointer 846 */ 847 #ifndef SQLITE_PTRSIZE 848 # if defined(__SIZEOF_POINTER__) 849 # define SQLITE_PTRSIZE __SIZEOF_POINTER__ 850 # elif defined(i386) || defined(__i386__) || defined(_M_IX86) || \ 851 defined(_M_ARM) || defined(__arm__) || defined(__x86) || \ 852 (defined(__TOS_AIX__) && !defined(__64BIT__)) 853 # define SQLITE_PTRSIZE 4 854 # else 855 # define SQLITE_PTRSIZE 8 856 # endif 857 #endif 858 859 /* The uptr type is an unsigned integer large enough to hold a pointer 860 */ 861 #if defined(HAVE_STDINT_H) 862 typedef uintptr_t uptr; 863 #elif SQLITE_PTRSIZE==4 864 typedef u32 uptr; 865 #else 866 typedef u64 uptr; 867 #endif 868 869 /* 870 ** The SQLITE_WITHIN(P,S,E) macro checks to see if pointer P points to 871 ** something between S (inclusive) and E (exclusive). 872 ** 873 ** In other words, S is a buffer and E is a pointer to the first byte after 874 ** the end of buffer S. This macro returns true if P points to something 875 ** contained within the buffer S. 876 */ 877 #define SQLITE_WITHIN(P,S,E) (((uptr)(P)>=(uptr)(S))&&((uptr)(P)<(uptr)(E))) 878 879 880 /* 881 ** Macros to determine whether the machine is big or little endian, 882 ** and whether or not that determination is run-time or compile-time. 883 ** 884 ** For best performance, an attempt is made to guess at the byte-order 885 ** using C-preprocessor macros. If that is unsuccessful, or if 886 ** -DSQLITE_BYTEORDER=0 is set, then byte-order is determined 887 ** at run-time. 888 */ 889 #ifndef SQLITE_BYTEORDER 890 # if defined(i386) || defined(__i386__) || defined(_M_IX86) || \ 891 defined(__x86_64) || defined(__x86_64__) || defined(_M_X64) || \ 892 defined(_M_AMD64) || defined(_M_ARM) || defined(__x86) || \ 893 defined(__ARMEL__) || defined(__AARCH64EL__) || defined(_M_ARM64) 894 # define SQLITE_BYTEORDER 1234 895 # elif defined(sparc) || defined(__ppc__) || \ 896 defined(__ARMEB__) || defined(__AARCH64EB__) 897 # define SQLITE_BYTEORDER 4321 898 # else 899 # define SQLITE_BYTEORDER 0 900 # endif 901 #endif 902 #if SQLITE_BYTEORDER==4321 903 # define SQLITE_BIGENDIAN 1 904 # define SQLITE_LITTLEENDIAN 0 905 # define SQLITE_UTF16NATIVE SQLITE_UTF16BE 906 #elif SQLITE_BYTEORDER==1234 907 # define SQLITE_BIGENDIAN 0 908 # define SQLITE_LITTLEENDIAN 1 909 # define SQLITE_UTF16NATIVE SQLITE_UTF16LE 910 #else 911 # ifdef SQLITE_AMALGAMATION 912 const int sqlite3one = 1; 913 # else 914 extern const int sqlite3one; 915 # endif 916 # define SQLITE_BIGENDIAN (*(char *)(&sqlite3one)==0) 917 # define SQLITE_LITTLEENDIAN (*(char *)(&sqlite3one)==1) 918 # define SQLITE_UTF16NATIVE (SQLITE_BIGENDIAN?SQLITE_UTF16BE:SQLITE_UTF16LE) 919 #endif 920 921 /* 922 ** Constants for the largest and smallest possible 64-bit signed integers. 923 ** These macros are designed to work correctly on both 32-bit and 64-bit 924 ** compilers. 925 */ 926 #define LARGEST_INT64 (0xffffffff|(((i64)0x7fffffff)<<32)) 927 #define LARGEST_UINT64 (0xffffffff|(((u64)0xffffffff)<<32)) 928 #define SMALLEST_INT64 (((i64)-1) - LARGEST_INT64) 929 930 /* 931 ** Round up a number to the next larger multiple of 8. This is used 932 ** to force 8-byte alignment on 64-bit architectures. 933 */ 934 #define ROUND8(x) (((x)+7)&~7) 935 936 /* 937 ** Round down to the nearest multiple of 8 938 */ 939 #define ROUNDDOWN8(x) ((x)&~7) 940 941 /* 942 ** Assert that the pointer X is aligned to an 8-byte boundary. This 943 ** macro is used only within assert() to verify that the code gets 944 ** all alignment restrictions correct. 945 ** 946 ** Except, if SQLITE_4_BYTE_ALIGNED_MALLOC is defined, then the 947 ** underlying malloc() implementation might return us 4-byte aligned 948 ** pointers. In that case, only verify 4-byte alignment. 949 */ 950 #ifdef SQLITE_4_BYTE_ALIGNED_MALLOC 951 # define EIGHT_BYTE_ALIGNMENT(X) ((((char*)(X) - (char*)0)&3)==0) 952 #else 953 # define EIGHT_BYTE_ALIGNMENT(X) ((((char*)(X) - (char*)0)&7)==0) 954 #endif 955 956 /* 957 ** Disable MMAP on platforms where it is known to not work 958 */ 959 #if defined(__OpenBSD__) || defined(__QNXNTO__) 960 # undef SQLITE_MAX_MMAP_SIZE 961 # define SQLITE_MAX_MMAP_SIZE 0 962 #endif 963 964 /* 965 ** Default maximum size of memory used by memory-mapped I/O in the VFS 966 */ 967 #ifdef __APPLE__ 968 # include <TargetConditionals.h> 969 #endif 970 #ifndef SQLITE_MAX_MMAP_SIZE 971 # if defined(__linux__) \ 972 || defined(_WIN32) \ 973 || (defined(__APPLE__) && defined(__MACH__)) \ 974 || defined(__sun) \ 975 || defined(__FreeBSD__) \ 976 || defined(__DragonFly__) 977 # define SQLITE_MAX_MMAP_SIZE 0x7fff0000 /* 2147418112 */ 978 # else 979 # define SQLITE_MAX_MMAP_SIZE 0 980 # endif 981 #endif 982 983 /* 984 ** The default MMAP_SIZE is zero on all platforms. Or, even if a larger 985 ** default MMAP_SIZE is specified at compile-time, make sure that it does 986 ** not exceed the maximum mmap size. 987 */ 988 #ifndef SQLITE_DEFAULT_MMAP_SIZE 989 # define SQLITE_DEFAULT_MMAP_SIZE 0 990 #endif 991 #if SQLITE_DEFAULT_MMAP_SIZE>SQLITE_MAX_MMAP_SIZE 992 # undef SQLITE_DEFAULT_MMAP_SIZE 993 # define SQLITE_DEFAULT_MMAP_SIZE SQLITE_MAX_MMAP_SIZE 994 #endif 995 996 /* 997 ** SELECTTRACE_ENABLED will be either 1 or 0 depending on whether or not 998 ** the Select query generator tracing logic is turned on. 999 */ 1000 #if !defined(SQLITE_AMALGAMATION) 1001 extern u32 sqlite3SelectTrace; 1002 #endif 1003 #if defined(SQLITE_DEBUG) \ 1004 && (defined(SQLITE_TEST) || defined(SQLITE_ENABLE_SELECTTRACE)) 1005 # define SELECTTRACE_ENABLED 1 1006 # define SELECTTRACE(K,P,S,X) \ 1007 if(sqlite3SelectTrace&(K)) \ 1008 sqlite3DebugPrintf("%u/%d/%p: ",(S)->selId,(P)->addrExplain,(S)),\ 1009 sqlite3DebugPrintf X 1010 #else 1011 # define SELECTTRACE(K,P,S,X) 1012 # define SELECTTRACE_ENABLED 0 1013 #endif 1014 1015 /* 1016 ** Macros for "wheretrace" 1017 */ 1018 extern u32 sqlite3WhereTrace; 1019 #if defined(SQLITE_DEBUG) \ 1020 && (defined(SQLITE_TEST) || defined(SQLITE_ENABLE_WHERETRACE)) 1021 # define WHERETRACE(K,X) if(sqlite3WhereTrace&(K)) sqlite3DebugPrintf X 1022 # define WHERETRACE_ENABLED 1 1023 #else 1024 # define WHERETRACE(K,X) 1025 #endif 1026 1027 1028 /* 1029 ** An instance of the following structure is used to store the busy-handler 1030 ** callback for a given sqlite handle. 1031 ** 1032 ** The sqlite.busyHandler member of the sqlite struct contains the busy 1033 ** callback for the database handle. Each pager opened via the sqlite 1034 ** handle is passed a pointer to sqlite.busyHandler. The busy-handler 1035 ** callback is currently invoked only from within pager.c. 1036 */ 1037 typedef struct BusyHandler BusyHandler; 1038 struct BusyHandler { 1039 int (*xBusyHandler)(void *,int); /* The busy callback */ 1040 void *pBusyArg; /* First arg to busy callback */ 1041 int nBusy; /* Incremented with each busy call */ 1042 }; 1043 1044 /* 1045 ** Name of table that holds the database schema. 1046 */ 1047 #define DFLT_SCHEMA_TABLE "sqlite_master" 1048 #define DFLT_TEMP_SCHEMA_TABLE "sqlite_temp_master" 1049 #define ALT_SCHEMA_TABLE "sqlite_schema" 1050 #define ALT_TEMP_SCHEMA_TABLE "sqlite_temp_schema" 1051 1052 1053 /* 1054 ** The root-page of the schema table. 1055 */ 1056 #define SCHEMA_ROOT 1 1057 1058 /* 1059 ** The name of the schema table. The name is different for TEMP. 1060 */ 1061 #define SCHEMA_TABLE(x) \ 1062 ((!OMIT_TEMPDB)&&(x==1)?DFLT_TEMP_SCHEMA_TABLE:DFLT_SCHEMA_TABLE) 1063 1064 /* 1065 ** A convenience macro that returns the number of elements in 1066 ** an array. 1067 */ 1068 #define ArraySize(X) ((int)(sizeof(X)/sizeof(X[0]))) 1069 1070 /* 1071 ** Determine if the argument is a power of two 1072 */ 1073 #define IsPowerOfTwo(X) (((X)&((X)-1))==0) 1074 1075 /* 1076 ** The following value as a destructor means to use sqlite3DbFree(). 1077 ** The sqlite3DbFree() routine requires two parameters instead of the 1078 ** one parameter that destructors normally want. So we have to introduce 1079 ** this magic value that the code knows to handle differently. Any 1080 ** pointer will work here as long as it is distinct from SQLITE_STATIC 1081 ** and SQLITE_TRANSIENT. 1082 */ 1083 #define SQLITE_DYNAMIC ((sqlite3_destructor_type)sqlite3OomFault) 1084 1085 /* 1086 ** When SQLITE_OMIT_WSD is defined, it means that the target platform does 1087 ** not support Writable Static Data (WSD) such as global and static variables. 1088 ** All variables must either be on the stack or dynamically allocated from 1089 ** the heap. When WSD is unsupported, the variable declarations scattered 1090 ** throughout the SQLite code must become constants instead. The SQLITE_WSD 1091 ** macro is used for this purpose. And instead of referencing the variable 1092 ** directly, we use its constant as a key to lookup the run-time allocated 1093 ** buffer that holds real variable. The constant is also the initializer 1094 ** for the run-time allocated buffer. 1095 ** 1096 ** In the usual case where WSD is supported, the SQLITE_WSD and GLOBAL 1097 ** macros become no-ops and have zero performance impact. 1098 */ 1099 #ifdef SQLITE_OMIT_WSD 1100 #define SQLITE_WSD const 1101 #define GLOBAL(t,v) (*(t*)sqlite3_wsd_find((void*)&(v), sizeof(v))) 1102 #define sqlite3GlobalConfig GLOBAL(struct Sqlite3Config, sqlite3Config) 1103 int sqlite3_wsd_init(int N, int J); 1104 void *sqlite3_wsd_find(void *K, int L); 1105 #else 1106 #define SQLITE_WSD 1107 #define GLOBAL(t,v) v 1108 #define sqlite3GlobalConfig sqlite3Config 1109 #endif 1110 1111 /* 1112 ** The following macros are used to suppress compiler warnings and to 1113 ** make it clear to human readers when a function parameter is deliberately 1114 ** left unused within the body of a function. This usually happens when 1115 ** a function is called via a function pointer. For example the 1116 ** implementation of an SQL aggregate step callback may not use the 1117 ** parameter indicating the number of arguments passed to the aggregate, 1118 ** if it knows that this is enforced elsewhere. 1119 ** 1120 ** When a function parameter is not used at all within the body of a function, 1121 ** it is generally named "NotUsed" or "NotUsed2" to make things even clearer. 1122 ** However, these macros may also be used to suppress warnings related to 1123 ** parameters that may or may not be used depending on compilation options. 1124 ** For example those parameters only used in assert() statements. In these 1125 ** cases the parameters are named as per the usual conventions. 1126 */ 1127 #define UNUSED_PARAMETER(x) (void)(x) 1128 #define UNUSED_PARAMETER2(x,y) UNUSED_PARAMETER(x),UNUSED_PARAMETER(y) 1129 1130 /* 1131 ** Forward references to structures 1132 */ 1133 typedef struct AggInfo AggInfo; 1134 typedef struct AuthContext AuthContext; 1135 typedef struct AutoincInfo AutoincInfo; 1136 typedef struct Bitvec Bitvec; 1137 typedef struct CollSeq CollSeq; 1138 typedef struct Column Column; 1139 typedef struct Db Db; 1140 typedef struct DbFixer DbFixer; 1141 typedef struct Schema Schema; 1142 typedef struct Expr Expr; 1143 typedef struct ExprList ExprList; 1144 typedef struct FKey FKey; 1145 typedef struct FuncDestructor FuncDestructor; 1146 typedef struct FuncDef FuncDef; 1147 typedef struct FuncDefHash FuncDefHash; 1148 typedef struct IdList IdList; 1149 typedef struct Index Index; 1150 typedef struct IndexSample IndexSample; 1151 typedef struct KeyClass KeyClass; 1152 typedef struct KeyInfo KeyInfo; 1153 typedef struct Lookaside Lookaside; 1154 typedef struct LookasideSlot LookasideSlot; 1155 typedef struct Module Module; 1156 typedef struct NameContext NameContext; 1157 typedef struct Parse Parse; 1158 typedef struct ParseCleanup ParseCleanup; 1159 typedef struct PreUpdate PreUpdate; 1160 typedef struct PrintfArguments PrintfArguments; 1161 typedef struct RenameToken RenameToken; 1162 typedef struct RowSet RowSet; 1163 typedef struct Savepoint Savepoint; 1164 typedef struct Select Select; 1165 typedef struct SQLiteThread SQLiteThread; 1166 typedef struct SelectDest SelectDest; 1167 typedef struct SrcList SrcList; 1168 typedef struct sqlite3_str StrAccum; /* Internal alias for sqlite3_str */ 1169 typedef struct Table Table; 1170 typedef struct TableLock TableLock; 1171 typedef struct Token Token; 1172 typedef struct TreeView TreeView; 1173 typedef struct Trigger Trigger; 1174 typedef struct TriggerPrg TriggerPrg; 1175 typedef struct TriggerStep TriggerStep; 1176 typedef struct UnpackedRecord UnpackedRecord; 1177 typedef struct Upsert Upsert; 1178 typedef struct VTable VTable; 1179 typedef struct VtabCtx VtabCtx; 1180 typedef struct Walker Walker; 1181 typedef struct WhereInfo WhereInfo; 1182 typedef struct Window Window; 1183 typedef struct With With; 1184 1185 1186 /* 1187 ** The bitmask datatype defined below is used for various optimizations. 1188 ** 1189 ** Changing this from a 64-bit to a 32-bit type limits the number of 1190 ** tables in a join to 32 instead of 64. But it also reduces the size 1191 ** of the library by 738 bytes on ix86. 1192 */ 1193 #ifdef SQLITE_BITMASK_TYPE 1194 typedef SQLITE_BITMASK_TYPE Bitmask; 1195 #else 1196 typedef u64 Bitmask; 1197 #endif 1198 1199 /* 1200 ** The number of bits in a Bitmask. "BMS" means "BitMask Size". 1201 */ 1202 #define BMS ((int)(sizeof(Bitmask)*8)) 1203 1204 /* 1205 ** A bit in a Bitmask 1206 */ 1207 #define MASKBIT(n) (((Bitmask)1)<<(n)) 1208 #define MASKBIT64(n) (((u64)1)<<(n)) 1209 #define MASKBIT32(n) (((unsigned int)1)<<(n)) 1210 #define ALLBITS ((Bitmask)-1) 1211 1212 /* A VList object records a mapping between parameters/variables/wildcards 1213 ** in the SQL statement (such as $abc, @pqr, or :xyz) and the integer 1214 ** variable number associated with that parameter. See the format description 1215 ** on the sqlite3VListAdd() routine for more information. A VList is really 1216 ** just an array of integers. 1217 */ 1218 typedef int VList; 1219 1220 /* 1221 ** Defer sourcing vdbe.h and btree.h until after the "u8" and 1222 ** "BusyHandler" typedefs. vdbe.h also requires a few of the opaque 1223 ** pointer types (i.e. FuncDef) defined above. 1224 */ 1225 #include "pager.h" 1226 #include "btree.h" 1227 #include "vdbe.h" 1228 #include "pcache.h" 1229 #include "os.h" 1230 #include "mutex.h" 1231 1232 /* The SQLITE_EXTRA_DURABLE compile-time option used to set the default 1233 ** synchronous setting to EXTRA. It is no longer supported. 1234 */ 1235 #ifdef SQLITE_EXTRA_DURABLE 1236 # warning Use SQLITE_DEFAULT_SYNCHRONOUS=3 instead of SQLITE_EXTRA_DURABLE 1237 # define SQLITE_DEFAULT_SYNCHRONOUS 3 1238 #endif 1239 1240 /* 1241 ** Default synchronous levels. 1242 ** 1243 ** Note that (for historcal reasons) the PAGER_SYNCHRONOUS_* macros differ 1244 ** from the SQLITE_DEFAULT_SYNCHRONOUS value by 1. 1245 ** 1246 ** PAGER_SYNCHRONOUS DEFAULT_SYNCHRONOUS 1247 ** OFF 1 0 1248 ** NORMAL 2 1 1249 ** FULL 3 2 1250 ** EXTRA 4 3 1251 ** 1252 ** The "PRAGMA synchronous" statement also uses the zero-based numbers. 1253 ** In other words, the zero-based numbers are used for all external interfaces 1254 ** and the one-based values are used internally. 1255 */ 1256 #ifndef SQLITE_DEFAULT_SYNCHRONOUS 1257 # define SQLITE_DEFAULT_SYNCHRONOUS 2 1258 #endif 1259 #ifndef SQLITE_DEFAULT_WAL_SYNCHRONOUS 1260 # define SQLITE_DEFAULT_WAL_SYNCHRONOUS SQLITE_DEFAULT_SYNCHRONOUS 1261 #endif 1262 1263 /* 1264 ** Each database file to be accessed by the system is an instance 1265 ** of the following structure. There are normally two of these structures 1266 ** in the sqlite.aDb[] array. aDb[0] is the main database file and 1267 ** aDb[1] is the database file used to hold temporary tables. Additional 1268 ** databases may be attached. 1269 */ 1270 struct Db { 1271 char *zDbSName; /* Name of this database. (schema name, not filename) */ 1272 Btree *pBt; /* The B*Tree structure for this database file */ 1273 u8 safety_level; /* How aggressive at syncing data to disk */ 1274 u8 bSyncSet; /* True if "PRAGMA synchronous=N" has been run */ 1275 Schema *pSchema; /* Pointer to database schema (possibly shared) */ 1276 }; 1277 1278 /* 1279 ** An instance of the following structure stores a database schema. 1280 ** 1281 ** Most Schema objects are associated with a Btree. The exception is 1282 ** the Schema for the TEMP databaes (sqlite3.aDb[1]) which is free-standing. 1283 ** In shared cache mode, a single Schema object can be shared by multiple 1284 ** Btrees that refer to the same underlying BtShared object. 1285 ** 1286 ** Schema objects are automatically deallocated when the last Btree that 1287 ** references them is destroyed. The TEMP Schema is manually freed by 1288 ** sqlite3_close(). 1289 * 1290 ** A thread must be holding a mutex on the corresponding Btree in order 1291 ** to access Schema content. This implies that the thread must also be 1292 ** holding a mutex on the sqlite3 connection pointer that owns the Btree. 1293 ** For a TEMP Schema, only the connection mutex is required. 1294 */ 1295 struct Schema { 1296 int schema_cookie; /* Database schema version number for this file */ 1297 int iGeneration; /* Generation counter. Incremented with each change */ 1298 Hash tblHash; /* All tables indexed by name */ 1299 Hash idxHash; /* All (named) indices indexed by name */ 1300 Hash trigHash; /* All triggers indexed by name */ 1301 Hash fkeyHash; /* All foreign keys by referenced table name */ 1302 Table *pSeqTab; /* The sqlite_sequence table used by AUTOINCREMENT */ 1303 u8 file_format; /* Schema format version for this file */ 1304 u8 enc; /* Text encoding used by this database */ 1305 u16 schemaFlags; /* Flags associated with this schema */ 1306 int cache_size; /* Number of pages to use in the cache */ 1307 }; 1308 1309 /* 1310 ** These macros can be used to test, set, or clear bits in the 1311 ** Db.pSchema->flags field. 1312 */ 1313 #define DbHasProperty(D,I,P) (((D)->aDb[I].pSchema->schemaFlags&(P))==(P)) 1314 #define DbHasAnyProperty(D,I,P) (((D)->aDb[I].pSchema->schemaFlags&(P))!=0) 1315 #define DbSetProperty(D,I,P) (D)->aDb[I].pSchema->schemaFlags|=(P) 1316 #define DbClearProperty(D,I,P) (D)->aDb[I].pSchema->schemaFlags&=~(P) 1317 1318 /* 1319 ** Allowed values for the DB.pSchema->flags field. 1320 ** 1321 ** The DB_SchemaLoaded flag is set after the database schema has been 1322 ** read into internal hash tables. 1323 ** 1324 ** DB_UnresetViews means that one or more views have column names that 1325 ** have been filled out. If the schema changes, these column names might 1326 ** changes and so the view will need to be reset. 1327 */ 1328 #define DB_SchemaLoaded 0x0001 /* The schema has been loaded */ 1329 #define DB_UnresetViews 0x0002 /* Some views have defined column names */ 1330 #define DB_ResetWanted 0x0008 /* Reset the schema when nSchemaLock==0 */ 1331 1332 /* 1333 ** The number of different kinds of things that can be limited 1334 ** using the sqlite3_limit() interface. 1335 */ 1336 #define SQLITE_N_LIMIT (SQLITE_LIMIT_WORKER_THREADS+1) 1337 1338 /* 1339 ** Lookaside malloc is a set of fixed-size buffers that can be used 1340 ** to satisfy small transient memory allocation requests for objects 1341 ** associated with a particular database connection. The use of 1342 ** lookaside malloc provides a significant performance enhancement 1343 ** (approx 10%) by avoiding numerous malloc/free requests while parsing 1344 ** SQL statements. 1345 ** 1346 ** The Lookaside structure holds configuration information about the 1347 ** lookaside malloc subsystem. Each available memory allocation in 1348 ** the lookaside subsystem is stored on a linked list of LookasideSlot 1349 ** objects. 1350 ** 1351 ** Lookaside allocations are only allowed for objects that are associated 1352 ** with a particular database connection. Hence, schema information cannot 1353 ** be stored in lookaside because in shared cache mode the schema information 1354 ** is shared by multiple database connections. Therefore, while parsing 1355 ** schema information, the Lookaside.bEnabled flag is cleared so that 1356 ** lookaside allocations are not used to construct the schema objects. 1357 ** 1358 ** New lookaside allocations are only allowed if bDisable==0. When 1359 ** bDisable is greater than zero, sz is set to zero which effectively 1360 ** disables lookaside without adding a new test for the bDisable flag 1361 ** in a performance-critical path. sz should be set by to szTrue whenever 1362 ** bDisable changes back to zero. 1363 ** 1364 ** Lookaside buffers are initially held on the pInit list. As they are 1365 ** used and freed, they are added back to the pFree list. New allocations 1366 ** come off of pFree first, then pInit as a fallback. This dual-list 1367 ** allows use to compute a high-water mark - the maximum number of allocations 1368 ** outstanding at any point in the past - by subtracting the number of 1369 ** allocations on the pInit list from the total number of allocations. 1370 ** 1371 ** Enhancement on 2019-12-12: Two-size-lookaside 1372 ** The default lookaside configuration is 100 slots of 1200 bytes each. 1373 ** The larger slot sizes are important for performance, but they waste 1374 ** a lot of space, as most lookaside allocations are less than 128 bytes. 1375 ** The two-size-lookaside enhancement breaks up the lookaside allocation 1376 ** into two pools: One of 128-byte slots and the other of the default size 1377 ** (1200-byte) slots. Allocations are filled from the small-pool first, 1378 ** failing over to the full-size pool if that does not work. Thus more 1379 ** lookaside slots are available while also using less memory. 1380 ** This enhancement can be omitted by compiling with 1381 ** SQLITE_OMIT_TWOSIZE_LOOKASIDE. 1382 */ 1383 struct Lookaside { 1384 u32 bDisable; /* Only operate the lookaside when zero */ 1385 u16 sz; /* Size of each buffer in bytes */ 1386 u16 szTrue; /* True value of sz, even if disabled */ 1387 u8 bMalloced; /* True if pStart obtained from sqlite3_malloc() */ 1388 u32 nSlot; /* Number of lookaside slots allocated */ 1389 u32 anStat[3]; /* 0: hits. 1: size misses. 2: full misses */ 1390 LookasideSlot *pInit; /* List of buffers not previously used */ 1391 LookasideSlot *pFree; /* List of available buffers */ 1392 #ifndef SQLITE_OMIT_TWOSIZE_LOOKASIDE 1393 LookasideSlot *pSmallInit; /* List of small buffers not prediously used */ 1394 LookasideSlot *pSmallFree; /* List of available small buffers */ 1395 void *pMiddle; /* First byte past end of full-size buffers and 1396 ** the first byte of LOOKASIDE_SMALL buffers */ 1397 #endif /* SQLITE_OMIT_TWOSIZE_LOOKASIDE */ 1398 void *pStart; /* First byte of available memory space */ 1399 void *pEnd; /* First byte past end of available space */ 1400 }; 1401 struct LookasideSlot { 1402 LookasideSlot *pNext; /* Next buffer in the list of free buffers */ 1403 }; 1404 1405 #define DisableLookaside db->lookaside.bDisable++;db->lookaside.sz=0 1406 #define EnableLookaside db->lookaside.bDisable--;\ 1407 db->lookaside.sz=db->lookaside.bDisable?0:db->lookaside.szTrue 1408 1409 /* Size of the smaller allocations in two-size lookside */ 1410 #ifdef SQLITE_OMIT_TWOSIZE_LOOKASIDE 1411 # define LOOKASIDE_SMALL 0 1412 #else 1413 # define LOOKASIDE_SMALL 128 1414 #endif 1415 1416 /* 1417 ** A hash table for built-in function definitions. (Application-defined 1418 ** functions use a regular table table from hash.h.) 1419 ** 1420 ** Hash each FuncDef structure into one of the FuncDefHash.a[] slots. 1421 ** Collisions are on the FuncDef.u.pHash chain. Use the SQLITE_FUNC_HASH() 1422 ** macro to compute a hash on the function name. 1423 */ 1424 #define SQLITE_FUNC_HASH_SZ 23 1425 struct FuncDefHash { 1426 FuncDef *a[SQLITE_FUNC_HASH_SZ]; /* Hash table for functions */ 1427 }; 1428 #define SQLITE_FUNC_HASH(C,L) (((C)+(L))%SQLITE_FUNC_HASH_SZ) 1429 1430 #ifdef SQLITE_USER_AUTHENTICATION 1431 /* 1432 ** Information held in the "sqlite3" database connection object and used 1433 ** to manage user authentication. 1434 */ 1435 typedef struct sqlite3_userauth sqlite3_userauth; 1436 struct sqlite3_userauth { 1437 u8 authLevel; /* Current authentication level */ 1438 int nAuthPW; /* Size of the zAuthPW in bytes */ 1439 char *zAuthPW; /* Password used to authenticate */ 1440 char *zAuthUser; /* User name used to authenticate */ 1441 }; 1442 1443 /* Allowed values for sqlite3_userauth.authLevel */ 1444 #define UAUTH_Unknown 0 /* Authentication not yet checked */ 1445 #define UAUTH_Fail 1 /* User authentication failed */ 1446 #define UAUTH_User 2 /* Authenticated as a normal user */ 1447 #define UAUTH_Admin 3 /* Authenticated as an administrator */ 1448 1449 /* Functions used only by user authorization logic */ 1450 int sqlite3UserAuthTable(const char*); 1451 int sqlite3UserAuthCheckLogin(sqlite3*,const char*,u8*); 1452 void sqlite3UserAuthInit(sqlite3*); 1453 void sqlite3CryptFunc(sqlite3_context*,int,sqlite3_value**); 1454 1455 #endif /* SQLITE_USER_AUTHENTICATION */ 1456 1457 /* 1458 ** typedef for the authorization callback function. 1459 */ 1460 #ifdef SQLITE_USER_AUTHENTICATION 1461 typedef int (*sqlite3_xauth)(void*,int,const char*,const char*,const char*, 1462 const char*, const char*); 1463 #else 1464 typedef int (*sqlite3_xauth)(void*,int,const char*,const char*,const char*, 1465 const char*); 1466 #endif 1467 1468 #ifndef SQLITE_OMIT_DEPRECATED 1469 /* This is an extra SQLITE_TRACE macro that indicates "legacy" tracing 1470 ** in the style of sqlite3_trace() 1471 */ 1472 #define SQLITE_TRACE_LEGACY 0x40 /* Use the legacy xTrace */ 1473 #define SQLITE_TRACE_XPROFILE 0x80 /* Use the legacy xProfile */ 1474 #else 1475 #define SQLITE_TRACE_LEGACY 0 1476 #define SQLITE_TRACE_XPROFILE 0 1477 #endif /* SQLITE_OMIT_DEPRECATED */ 1478 #define SQLITE_TRACE_NONLEGACY_MASK 0x0f /* Normal flags */ 1479 1480 1481 /* 1482 ** Each database connection is an instance of the following structure. 1483 */ 1484 struct sqlite3 { 1485 sqlite3_vfs *pVfs; /* OS Interface */ 1486 struct Vdbe *pVdbe; /* List of active virtual machines */ 1487 CollSeq *pDfltColl; /* BINARY collseq for the database encoding */ 1488 sqlite3_mutex *mutex; /* Connection mutex */ 1489 Db *aDb; /* All backends */ 1490 int nDb; /* Number of backends currently in use */ 1491 u32 mDbFlags; /* flags recording internal state */ 1492 u64 flags; /* flags settable by pragmas. See below */ 1493 i64 lastRowid; /* ROWID of most recent insert (see above) */ 1494 i64 szMmap; /* Default mmap_size setting */ 1495 u32 nSchemaLock; /* Do not reset the schema when non-zero */ 1496 unsigned int openFlags; /* Flags passed to sqlite3_vfs.xOpen() */ 1497 int errCode; /* Most recent error code (SQLITE_*) */ 1498 int errMask; /* & result codes with this before returning */ 1499 int iSysErrno; /* Errno value from last system error */ 1500 u32 dbOptFlags; /* Flags to enable/disable optimizations */ 1501 u8 enc; /* Text encoding */ 1502 u8 autoCommit; /* The auto-commit flag. */ 1503 u8 temp_store; /* 1: file 2: memory 0: default */ 1504 u8 mallocFailed; /* True if we have seen a malloc failure */ 1505 u8 bBenignMalloc; /* Do not require OOMs if true */ 1506 u8 dfltLockMode; /* Default locking-mode for attached dbs */ 1507 signed char nextAutovac; /* Autovac setting after VACUUM if >=0 */ 1508 u8 suppressErr; /* Do not issue error messages if true */ 1509 u8 vtabOnConflict; /* Value to return for s3_vtab_on_conflict() */ 1510 u8 isTransactionSavepoint; /* True if the outermost savepoint is a TS */ 1511 u8 mTrace; /* zero or more SQLITE_TRACE flags */ 1512 u8 noSharedCache; /* True if no shared-cache backends */ 1513 u8 nSqlExec; /* Number of pending OP_SqlExec opcodes */ 1514 int nextPagesize; /* Pagesize after VACUUM if >0 */ 1515 u32 magic; /* Magic number for detect library misuse */ 1516 int nChange; /* Value returned by sqlite3_changes() */ 1517 int nTotalChange; /* Value returned by sqlite3_total_changes() */ 1518 int aLimit[SQLITE_N_LIMIT]; /* Limits */ 1519 int nMaxSorterMmap; /* Maximum size of regions mapped by sorter */ 1520 struct sqlite3InitInfo { /* Information used during initialization */ 1521 Pgno newTnum; /* Rootpage of table being initialized */ 1522 u8 iDb; /* Which db file is being initialized */ 1523 u8 busy; /* TRUE if currently initializing */ 1524 unsigned orphanTrigger : 1; /* Last statement is orphaned TEMP trigger */ 1525 unsigned imposterTable : 1; /* Building an imposter table */ 1526 unsigned reopenMemdb : 1; /* ATTACH is really a reopen using MemDB */ 1527 char **azInit; /* "type", "name", and "tbl_name" columns */ 1528 } init; 1529 int nVdbeActive; /* Number of VDBEs currently running */ 1530 int nVdbeRead; /* Number of active VDBEs that read or write */ 1531 int nVdbeWrite; /* Number of active VDBEs that read and write */ 1532 int nVdbeExec; /* Number of nested calls to VdbeExec() */ 1533 int nVDestroy; /* Number of active OP_VDestroy operations */ 1534 int nExtension; /* Number of loaded extensions */ 1535 void **aExtension; /* Array of shared library handles */ 1536 union { 1537 void (*xLegacy)(void*,const char*); /* Legacy trace function */ 1538 int (*xV2)(u32,void*,void*,void*); /* V2 Trace function */ 1539 } trace; 1540 void *pTraceArg; /* Argument to the trace function */ 1541 #ifndef SQLITE_OMIT_DEPRECATED 1542 void (*xProfile)(void*,const char*,u64); /* Profiling function */ 1543 void *pProfileArg; /* Argument to profile function */ 1544 #endif 1545 void *pCommitArg; /* Argument to xCommitCallback() */ 1546 int (*xCommitCallback)(void*); /* Invoked at every commit. */ 1547 void *pRollbackArg; /* Argument to xRollbackCallback() */ 1548 void (*xRollbackCallback)(void*); /* Invoked at every commit. */ 1549 void *pUpdateArg; 1550 void (*xUpdateCallback)(void*,int, const char*,const char*,sqlite_int64); 1551 Parse *pParse; /* Current parse */ 1552 #ifdef SQLITE_ENABLE_PREUPDATE_HOOK 1553 void *pPreUpdateArg; /* First argument to xPreUpdateCallback */ 1554 void (*xPreUpdateCallback)( /* Registered using sqlite3_preupdate_hook() */ 1555 void*,sqlite3*,int,char const*,char const*,sqlite3_int64,sqlite3_int64 1556 ); 1557 PreUpdate *pPreUpdate; /* Context for active pre-update callback */ 1558 #endif /* SQLITE_ENABLE_PREUPDATE_HOOK */ 1559 #ifndef SQLITE_OMIT_WAL 1560 int (*xWalCallback)(void *, sqlite3 *, const char *, int); 1561 void *pWalArg; 1562 #endif 1563 void(*xCollNeeded)(void*,sqlite3*,int eTextRep,const char*); 1564 void(*xCollNeeded16)(void*,sqlite3*,int eTextRep,const void*); 1565 void *pCollNeededArg; 1566 sqlite3_value *pErr; /* Most recent error message */ 1567 union { 1568 volatile int isInterrupted; /* True if sqlite3_interrupt has been called */ 1569 double notUsed1; /* Spacer */ 1570 } u1; 1571 Lookaside lookaside; /* Lookaside malloc configuration */ 1572 #ifndef SQLITE_OMIT_AUTHORIZATION 1573 sqlite3_xauth xAuth; /* Access authorization function */ 1574 void *pAuthArg; /* 1st argument to the access auth function */ 1575 #endif 1576 #ifndef SQLITE_OMIT_PROGRESS_CALLBACK 1577 int (*xProgress)(void *); /* The progress callback */ 1578 void *pProgressArg; /* Argument to the progress callback */ 1579 unsigned nProgressOps; /* Number of opcodes for progress callback */ 1580 #endif 1581 #ifndef SQLITE_OMIT_VIRTUALTABLE 1582 int nVTrans; /* Allocated size of aVTrans */ 1583 Hash aModule; /* populated by sqlite3_create_module() */ 1584 VtabCtx *pVtabCtx; /* Context for active vtab connect/create */ 1585 VTable **aVTrans; /* Virtual tables with open transactions */ 1586 VTable *pDisconnect; /* Disconnect these in next sqlite3_prepare() */ 1587 #endif 1588 Hash aFunc; /* Hash table of connection functions */ 1589 Hash aCollSeq; /* All collating sequences */ 1590 BusyHandler busyHandler; /* Busy callback */ 1591 Db aDbStatic[2]; /* Static space for the 2 default backends */ 1592 Savepoint *pSavepoint; /* List of active savepoints */ 1593 int nAnalysisLimit; /* Number of index rows to ANALYZE */ 1594 int busyTimeout; /* Busy handler timeout, in msec */ 1595 int nSavepoint; /* Number of non-transaction savepoints */ 1596 int nStatement; /* Number of nested statement-transactions */ 1597 i64 nDeferredCons; /* Net deferred constraints this transaction. */ 1598 i64 nDeferredImmCons; /* Net deferred immediate constraints */ 1599 int *pnBytesFreed; /* If not NULL, increment this in DbFree() */ 1600 #ifdef SQLITE_ENABLE_UNLOCK_NOTIFY 1601 /* The following variables are all protected by the STATIC_MAIN 1602 ** mutex, not by sqlite3.mutex. They are used by code in notify.c. 1603 ** 1604 ** When X.pUnlockConnection==Y, that means that X is waiting for Y to 1605 ** unlock so that it can proceed. 1606 ** 1607 ** When X.pBlockingConnection==Y, that means that something that X tried 1608 ** tried to do recently failed with an SQLITE_LOCKED error due to locks 1609 ** held by Y. 1610 */ 1611 sqlite3 *pBlockingConnection; /* Connection that caused SQLITE_LOCKED */ 1612 sqlite3 *pUnlockConnection; /* Connection to watch for unlock */ 1613 void *pUnlockArg; /* Argument to xUnlockNotify */ 1614 void (*xUnlockNotify)(void **, int); /* Unlock notify callback */ 1615 sqlite3 *pNextBlocked; /* Next in list of all blocked connections */ 1616 #endif 1617 #ifdef SQLITE_USER_AUTHENTICATION 1618 sqlite3_userauth auth; /* User authentication information */ 1619 #endif 1620 }; 1621 1622 /* 1623 ** A macro to discover the encoding of a database. 1624 */ 1625 #define SCHEMA_ENC(db) ((db)->aDb[0].pSchema->enc) 1626 #define ENC(db) ((db)->enc) 1627 1628 /* 1629 ** A u64 constant where the lower 32 bits are all zeros. Only the 1630 ** upper 32 bits are included in the argument. Necessary because some 1631 ** C-compilers still do not accept LL integer literals. 1632 */ 1633 #define HI(X) ((u64)(X)<<32) 1634 1635 /* 1636 ** Possible values for the sqlite3.flags. 1637 ** 1638 ** Value constraints (enforced via assert()): 1639 ** SQLITE_FullFSync == PAGER_FULLFSYNC 1640 ** SQLITE_CkptFullFSync == PAGER_CKPT_FULLFSYNC 1641 ** SQLITE_CacheSpill == PAGER_CACHE_SPILL 1642 */ 1643 #define SQLITE_WriteSchema 0x00000001 /* OK to update SQLITE_SCHEMA */ 1644 #define SQLITE_LegacyFileFmt 0x00000002 /* Create new databases in format 1 */ 1645 #define SQLITE_FullColNames 0x00000004 /* Show full column names on SELECT */ 1646 #define SQLITE_FullFSync 0x00000008 /* Use full fsync on the backend */ 1647 #define SQLITE_CkptFullFSync 0x00000010 /* Use full fsync for checkpoint */ 1648 #define SQLITE_CacheSpill 0x00000020 /* OK to spill pager cache */ 1649 #define SQLITE_ShortColNames 0x00000040 /* Show short columns names */ 1650 #define SQLITE_TrustedSchema 0x00000080 /* Allow unsafe functions and 1651 ** vtabs in the schema definition */ 1652 #define SQLITE_NullCallback 0x00000100 /* Invoke the callback once if the */ 1653 /* result set is empty */ 1654 #define SQLITE_IgnoreChecks 0x00000200 /* Do not enforce check constraints */ 1655 #define SQLITE_ReadUncommit 0x00000400 /* READ UNCOMMITTED in shared-cache */ 1656 #define SQLITE_NoCkptOnClose 0x00000800 /* No checkpoint on close()/DETACH */ 1657 #define SQLITE_ReverseOrder 0x00001000 /* Reverse unordered SELECTs */ 1658 #define SQLITE_RecTriggers 0x00002000 /* Enable recursive triggers */ 1659 #define SQLITE_ForeignKeys 0x00004000 /* Enforce foreign key constraints */ 1660 #define SQLITE_AutoIndex 0x00008000 /* Enable automatic indexes */ 1661 #define SQLITE_LoadExtension 0x00010000 /* Enable load_extension */ 1662 #define SQLITE_LoadExtFunc 0x00020000 /* Enable load_extension() SQL func */ 1663 #define SQLITE_EnableTrigger 0x00040000 /* True to enable triggers */ 1664 #define SQLITE_DeferFKs 0x00080000 /* Defer all FK constraints */ 1665 #define SQLITE_QueryOnly 0x00100000 /* Disable database changes */ 1666 #define SQLITE_CellSizeCk 0x00200000 /* Check btree cell sizes on load */ 1667 #define SQLITE_Fts3Tokenizer 0x00400000 /* Enable fts3_tokenizer(2) */ 1668 #define SQLITE_EnableQPSG 0x00800000 /* Query Planner Stability Guarantee*/ 1669 #define SQLITE_TriggerEQP 0x01000000 /* Show trigger EXPLAIN QUERY PLAN */ 1670 #define SQLITE_ResetDatabase 0x02000000 /* Reset the database */ 1671 #define SQLITE_LegacyAlter 0x04000000 /* Legacy ALTER TABLE behaviour */ 1672 #define SQLITE_NoSchemaError 0x08000000 /* Do not report schema parse errors*/ 1673 #define SQLITE_Defensive 0x10000000 /* Input SQL is likely hostile */ 1674 #define SQLITE_DqsDDL 0x20000000 /* dbl-quoted strings allowed in DDL*/ 1675 #define SQLITE_DqsDML 0x40000000 /* dbl-quoted strings allowed in DML*/ 1676 #define SQLITE_EnableView 0x80000000 /* Enable the use of views */ 1677 #define SQLITE_CountRows HI(0x00001) /* Count rows changed by INSERT, */ 1678 /* DELETE, or UPDATE and return */ 1679 /* the count using a callback. */ 1680 1681 /* Flags used only if debugging */ 1682 #ifdef SQLITE_DEBUG 1683 #define SQLITE_SqlTrace HI(0x0100000) /* Debug print SQL as it executes */ 1684 #define SQLITE_VdbeListing HI(0x0200000) /* Debug listings of VDBE progs */ 1685 #define SQLITE_VdbeTrace HI(0x0400000) /* True to trace VDBE execution */ 1686 #define SQLITE_VdbeAddopTrace HI(0x0800000) /* Trace sqlite3VdbeAddOp() calls */ 1687 #define SQLITE_VdbeEQP HI(0x1000000) /* Debug EXPLAIN QUERY PLAN */ 1688 #define SQLITE_ParserTrace HI(0x2000000) /* PRAGMA parser_trace=ON */ 1689 #endif 1690 1691 /* 1692 ** Allowed values for sqlite3.mDbFlags 1693 */ 1694 #define DBFLAG_SchemaChange 0x0001 /* Uncommitted Hash table changes */ 1695 #define DBFLAG_PreferBuiltin 0x0002 /* Preference to built-in funcs */ 1696 #define DBFLAG_Vacuum 0x0004 /* Currently in a VACUUM */ 1697 #define DBFLAG_VacuumInto 0x0008 /* Currently running VACUUM INTO */ 1698 #define DBFLAG_SchemaKnownOk 0x0010 /* Schema is known to be valid */ 1699 #define DBFLAG_InternalFunc 0x0020 /* Allow use of internal functions */ 1700 #define DBFLAG_EncodingFixed 0x0040 /* No longer possible to change enc. */ 1701 1702 /* 1703 ** Bits of the sqlite3.dbOptFlags field that are used by the 1704 ** sqlite3_test_control(SQLITE_TESTCTRL_OPTIMIZATIONS,...) interface to 1705 ** selectively disable various optimizations. 1706 */ 1707 #define SQLITE_QueryFlattener 0x00000001 /* Query flattening */ 1708 #define SQLITE_WindowFunc 0x00000002 /* Use xInverse for window functions */ 1709 #define SQLITE_GroupByOrder 0x00000004 /* GROUPBY cover of ORDERBY */ 1710 #define SQLITE_FactorOutConst 0x00000008 /* Constant factoring */ 1711 #define SQLITE_DistinctOpt 0x00000010 /* DISTINCT using indexes */ 1712 #define SQLITE_CoverIdxScan 0x00000020 /* Covering index scans */ 1713 #define SQLITE_OrderByIdxJoin 0x00000040 /* ORDER BY of joins via index */ 1714 #define SQLITE_Transitive 0x00000080 /* Transitive constraints */ 1715 #define SQLITE_OmitNoopJoin 0x00000100 /* Omit unused tables in joins */ 1716 #define SQLITE_CountOfView 0x00000200 /* The count-of-view optimization */ 1717 #define SQLITE_CursorHints 0x00000400 /* Add OP_CursorHint opcodes */ 1718 #define SQLITE_Stat4 0x00000800 /* Use STAT4 data */ 1719 /* TH3 expects this value ^^^^^^^^^^ to be 0x0000800. Don't change it */ 1720 #define SQLITE_PushDown 0x00001000 /* The push-down optimization */ 1721 #define SQLITE_SimplifyJoin 0x00002000 /* Convert LEFT JOIN to JOIN */ 1722 #define SQLITE_SkipScan 0x00004000 /* Skip-scans */ 1723 #define SQLITE_PropagateConst 0x00008000 /* The constant propagation opt */ 1724 #define SQLITE_MinMaxOpt 0x00010000 /* The min/max optimization */ 1725 #define SQLITE_ExistsToIN 0x00020000 /* The EXISTS-to-IN optimization */ 1726 #define SQLITE_AllOpts 0xffffffff /* All optimizations */ 1727 1728 /* 1729 ** Macros for testing whether or not optimizations are enabled or disabled. 1730 */ 1731 #define OptimizationDisabled(db, mask) (((db)->dbOptFlags&(mask))!=0) 1732 #define OptimizationEnabled(db, mask) (((db)->dbOptFlags&(mask))==0) 1733 1734 /* 1735 ** Return true if it OK to factor constant expressions into the initialization 1736 ** code. The argument is a Parse object for the code generator. 1737 */ 1738 #define ConstFactorOk(P) ((P)->okConstFactor) 1739 1740 /* 1741 ** Possible values for the sqlite.magic field. 1742 ** The numbers are obtained at random and have no special meaning, other 1743 ** than being distinct from one another. 1744 */ 1745 #define SQLITE_MAGIC_OPEN 0xa029a697 /* Database is open */ 1746 #define SQLITE_MAGIC_CLOSED 0x9f3c2d33 /* Database is closed */ 1747 #define SQLITE_MAGIC_SICK 0x4b771290 /* Error and awaiting close */ 1748 #define SQLITE_MAGIC_BUSY 0xf03b7906 /* Database currently in use */ 1749 #define SQLITE_MAGIC_ERROR 0xb5357930 /* An SQLITE_MISUSE error occurred */ 1750 #define SQLITE_MAGIC_ZOMBIE 0x64cffc7f /* Close with last statement close */ 1751 1752 /* 1753 ** Each SQL function is defined by an instance of the following 1754 ** structure. For global built-in functions (ex: substr(), max(), count()) 1755 ** a pointer to this structure is held in the sqlite3BuiltinFunctions object. 1756 ** For per-connection application-defined functions, a pointer to this 1757 ** structure is held in the db->aHash hash table. 1758 ** 1759 ** The u.pHash field is used by the global built-ins. The u.pDestructor 1760 ** field is used by per-connection app-def functions. 1761 */ 1762 struct FuncDef { 1763 i8 nArg; /* Number of arguments. -1 means unlimited */ 1764 u32 funcFlags; /* Some combination of SQLITE_FUNC_* */ 1765 void *pUserData; /* User data parameter */ 1766 FuncDef *pNext; /* Next function with same name */ 1767 void (*xSFunc)(sqlite3_context*,int,sqlite3_value**); /* func or agg-step */ 1768 void (*xFinalize)(sqlite3_context*); /* Agg finalizer */ 1769 void (*xValue)(sqlite3_context*); /* Current agg value */ 1770 void (*xInverse)(sqlite3_context*,int,sqlite3_value**); /* inverse agg-step */ 1771 const char *zName; /* SQL name of the function. */ 1772 union { 1773 FuncDef *pHash; /* Next with a different name but the same hash */ 1774 FuncDestructor *pDestructor; /* Reference counted destructor function */ 1775 } u; 1776 }; 1777 1778 /* 1779 ** This structure encapsulates a user-function destructor callback (as 1780 ** configured using create_function_v2()) and a reference counter. When 1781 ** create_function_v2() is called to create a function with a destructor, 1782 ** a single object of this type is allocated. FuncDestructor.nRef is set to 1783 ** the number of FuncDef objects created (either 1 or 3, depending on whether 1784 ** or not the specified encoding is SQLITE_ANY). The FuncDef.pDestructor 1785 ** member of each of the new FuncDef objects is set to point to the allocated 1786 ** FuncDestructor. 1787 ** 1788 ** Thereafter, when one of the FuncDef objects is deleted, the reference 1789 ** count on this object is decremented. When it reaches 0, the destructor 1790 ** is invoked and the FuncDestructor structure freed. 1791 */ 1792 struct FuncDestructor { 1793 int nRef; 1794 void (*xDestroy)(void *); 1795 void *pUserData; 1796 }; 1797 1798 /* 1799 ** Possible values for FuncDef.flags. Note that the _LENGTH and _TYPEOF 1800 ** values must correspond to OPFLAG_LENGTHARG and OPFLAG_TYPEOFARG. And 1801 ** SQLITE_FUNC_CONSTANT must be the same as SQLITE_DETERMINISTIC. There 1802 ** are assert() statements in the code to verify this. 1803 ** 1804 ** Value constraints (enforced via assert()): 1805 ** SQLITE_FUNC_MINMAX == NC_MinMaxAgg == SF_MinMaxAgg 1806 ** SQLITE_FUNC_LENGTH == OPFLAG_LENGTHARG 1807 ** SQLITE_FUNC_TYPEOF == OPFLAG_TYPEOFARG 1808 ** SQLITE_FUNC_CONSTANT == SQLITE_DETERMINISTIC from the API 1809 ** SQLITE_FUNC_DIRECT == SQLITE_DIRECTONLY from the API 1810 ** SQLITE_FUNC_UNSAFE == SQLITE_INNOCUOUS 1811 ** SQLITE_FUNC_ENCMASK depends on SQLITE_UTF* macros in the API 1812 */ 1813 #define SQLITE_FUNC_ENCMASK 0x0003 /* SQLITE_UTF8, SQLITE_UTF16BE or UTF16LE */ 1814 #define SQLITE_FUNC_LIKE 0x0004 /* Candidate for the LIKE optimization */ 1815 #define SQLITE_FUNC_CASE 0x0008 /* Case-sensitive LIKE-type function */ 1816 #define SQLITE_FUNC_EPHEM 0x0010 /* Ephemeral. Delete with VDBE */ 1817 #define SQLITE_FUNC_NEEDCOLL 0x0020 /* sqlite3GetFuncCollSeq() might be called*/ 1818 #define SQLITE_FUNC_LENGTH 0x0040 /* Built-in length() function */ 1819 #define SQLITE_FUNC_TYPEOF 0x0080 /* Built-in typeof() function */ 1820 #define SQLITE_FUNC_COUNT 0x0100 /* Built-in count(*) aggregate */ 1821 /* 0x0200 -- available for reuse */ 1822 #define SQLITE_FUNC_UNLIKELY 0x0400 /* Built-in unlikely() function */ 1823 #define SQLITE_FUNC_CONSTANT 0x0800 /* Constant inputs give a constant output */ 1824 #define SQLITE_FUNC_MINMAX 0x1000 /* True for min() and max() aggregates */ 1825 #define SQLITE_FUNC_SLOCHNG 0x2000 /* "Slow Change". Value constant during a 1826 ** single query - might change over time */ 1827 #define SQLITE_FUNC_TEST 0x4000 /* Built-in testing functions */ 1828 #define SQLITE_FUNC_OFFSET 0x8000 /* Built-in sqlite_offset() function */ 1829 #define SQLITE_FUNC_WINDOW 0x00010000 /* Built-in window-only function */ 1830 #define SQLITE_FUNC_INTERNAL 0x00040000 /* For use by NestedParse() only */ 1831 #define SQLITE_FUNC_DIRECT 0x00080000 /* Not for use in TRIGGERs or VIEWs */ 1832 #define SQLITE_FUNC_SUBTYPE 0x00100000 /* Result likely to have sub-type */ 1833 #define SQLITE_FUNC_UNSAFE 0x00200000 /* Function has side effects */ 1834 #define SQLITE_FUNC_INLINE 0x00400000 /* Functions implemented in-line */ 1835 1836 /* Identifier numbers for each in-line function */ 1837 #define INLINEFUNC_coalesce 0 1838 #define INLINEFUNC_implies_nonnull_row 1 1839 #define INLINEFUNC_expr_implies_expr 2 1840 #define INLINEFUNC_expr_compare 3 1841 #define INLINEFUNC_affinity 4 1842 #define INLINEFUNC_iif 5 1843 #define INLINEFUNC_unlikely 99 /* Default case */ 1844 1845 /* 1846 ** The following three macros, FUNCTION(), LIKEFUNC() and AGGREGATE() are 1847 ** used to create the initializers for the FuncDef structures. 1848 ** 1849 ** FUNCTION(zName, nArg, iArg, bNC, xFunc) 1850 ** Used to create a scalar function definition of a function zName 1851 ** implemented by C function xFunc that accepts nArg arguments. The 1852 ** value passed as iArg is cast to a (void*) and made available 1853 ** as the user-data (sqlite3_user_data()) for the function. If 1854 ** argument bNC is true, then the SQLITE_FUNC_NEEDCOLL flag is set. 1855 ** 1856 ** VFUNCTION(zName, nArg, iArg, bNC, xFunc) 1857 ** Like FUNCTION except it omits the SQLITE_FUNC_CONSTANT flag. 1858 ** 1859 ** SFUNCTION(zName, nArg, iArg, bNC, xFunc) 1860 ** Like FUNCTION except it omits the SQLITE_FUNC_CONSTANT flag and 1861 ** adds the SQLITE_DIRECTONLY flag. 1862 ** 1863 ** INLINE_FUNC(zName, nArg, iFuncId, mFlags) 1864 ** zName is the name of a function that is implemented by in-line 1865 ** byte code rather than by the usual callbacks. The iFuncId 1866 ** parameter determines the function id. The mFlags parameter is 1867 ** optional SQLITE_FUNC_ flags for this function. 1868 ** 1869 ** TEST_FUNC(zName, nArg, iFuncId, mFlags) 1870 ** zName is the name of a test-only function implemented by in-line 1871 ** byte code rather than by the usual callbacks. The iFuncId 1872 ** parameter determines the function id. The mFlags parameter is 1873 ** optional SQLITE_FUNC_ flags for this function. 1874 ** 1875 ** DFUNCTION(zName, nArg, iArg, bNC, xFunc) 1876 ** Like FUNCTION except it omits the SQLITE_FUNC_CONSTANT flag and 1877 ** adds the SQLITE_FUNC_SLOCHNG flag. Used for date & time functions 1878 ** and functions like sqlite_version() that can change, but not during 1879 ** a single query. The iArg is ignored. The user-data is always set 1880 ** to a NULL pointer. The bNC parameter is not used. 1881 ** 1882 ** MFUNCTION(zName, nArg, xPtr, xFunc) 1883 ** For math-library functions. xPtr is an arbitrary pointer. 1884 ** 1885 ** PURE_DATE(zName, nArg, iArg, bNC, xFunc) 1886 ** Used for "pure" date/time functions, this macro is like DFUNCTION 1887 ** except that it does set the SQLITE_FUNC_CONSTANT flags. iArg is 1888 ** ignored and the user-data for these functions is set to an 1889 ** arbitrary non-NULL pointer. The bNC parameter is not used. 1890 ** 1891 ** AGGREGATE(zName, nArg, iArg, bNC, xStep, xFinal) 1892 ** Used to create an aggregate function definition implemented by 1893 ** the C functions xStep and xFinal. The first four parameters 1894 ** are interpreted in the same way as the first 4 parameters to 1895 ** FUNCTION(). 1896 ** 1897 ** WFUNCTION(zName, nArg, iArg, xStep, xFinal, xValue, xInverse) 1898 ** Used to create an aggregate function definition implemented by 1899 ** the C functions xStep and xFinal. The first four parameters 1900 ** are interpreted in the same way as the first 4 parameters to 1901 ** FUNCTION(). 1902 ** 1903 ** LIKEFUNC(zName, nArg, pArg, flags) 1904 ** Used to create a scalar function definition of a function zName 1905 ** that accepts nArg arguments and is implemented by a call to C 1906 ** function likeFunc. Argument pArg is cast to a (void *) and made 1907 ** available as the function user-data (sqlite3_user_data()). The 1908 ** FuncDef.flags variable is set to the value passed as the flags 1909 ** parameter. 1910 */ 1911 #define FUNCTION(zName, nArg, iArg, bNC, xFunc) \ 1912 {nArg, SQLITE_FUNC_CONSTANT|SQLITE_UTF8|(bNC*SQLITE_FUNC_NEEDCOLL), \ 1913 SQLITE_INT_TO_PTR(iArg), 0, xFunc, 0, 0, 0, #zName, {0} } 1914 #define VFUNCTION(zName, nArg, iArg, bNC, xFunc) \ 1915 {nArg, SQLITE_UTF8|(bNC*SQLITE_FUNC_NEEDCOLL), \ 1916 SQLITE_INT_TO_PTR(iArg), 0, xFunc, 0, 0, 0, #zName, {0} } 1917 #define SFUNCTION(zName, nArg, iArg, bNC, xFunc) \ 1918 {nArg, SQLITE_UTF8|SQLITE_DIRECTONLY|SQLITE_FUNC_UNSAFE, \ 1919 SQLITE_INT_TO_PTR(iArg), 0, xFunc, 0, 0, 0, #zName, {0} } 1920 #define MFUNCTION(zName, nArg, xPtr, xFunc) \ 1921 {nArg, SQLITE_FUNC_CONSTANT|SQLITE_UTF8, \ 1922 xPtr, 0, xFunc, 0, 0, 0, #zName, {0} } 1923 #define INLINE_FUNC(zName, nArg, iArg, mFlags) \ 1924 {nArg, SQLITE_UTF8|SQLITE_FUNC_INLINE|SQLITE_FUNC_CONSTANT|(mFlags), \ 1925 SQLITE_INT_TO_PTR(iArg), 0, noopFunc, 0, 0, 0, #zName, {0} } 1926 #define TEST_FUNC(zName, nArg, iArg, mFlags) \ 1927 {nArg, SQLITE_UTF8|SQLITE_FUNC_INTERNAL|SQLITE_FUNC_TEST| \ 1928 SQLITE_FUNC_INLINE|SQLITE_FUNC_CONSTANT|(mFlags), \ 1929 SQLITE_INT_TO_PTR(iArg), 0, noopFunc, 0, 0, 0, #zName, {0} } 1930 #define DFUNCTION(zName, nArg, iArg, bNC, xFunc) \ 1931 {nArg, SQLITE_FUNC_SLOCHNG|SQLITE_UTF8, \ 1932 0, 0, xFunc, 0, 0, 0, #zName, {0} } 1933 #define PURE_DATE(zName, nArg, iArg, bNC, xFunc) \ 1934 {nArg, SQLITE_FUNC_SLOCHNG|SQLITE_UTF8|SQLITE_FUNC_CONSTANT, \ 1935 (void*)&sqlite3Config, 0, xFunc, 0, 0, 0, #zName, {0} } 1936 #define FUNCTION2(zName, nArg, iArg, bNC, xFunc, extraFlags) \ 1937 {nArg,SQLITE_FUNC_CONSTANT|SQLITE_UTF8|(bNC*SQLITE_FUNC_NEEDCOLL)|extraFlags,\ 1938 SQLITE_INT_TO_PTR(iArg), 0, xFunc, 0, 0, 0, #zName, {0} } 1939 #define STR_FUNCTION(zName, nArg, pArg, bNC, xFunc) \ 1940 {nArg, SQLITE_FUNC_SLOCHNG|SQLITE_UTF8|(bNC*SQLITE_FUNC_NEEDCOLL), \ 1941 pArg, 0, xFunc, 0, 0, 0, #zName, } 1942 #define LIKEFUNC(zName, nArg, arg, flags) \ 1943 {nArg, SQLITE_FUNC_CONSTANT|SQLITE_UTF8|flags, \ 1944 (void *)arg, 0, likeFunc, 0, 0, 0, #zName, {0} } 1945 #define WAGGREGATE(zName, nArg, arg, nc, xStep, xFinal, xValue, xInverse, f) \ 1946 {nArg, SQLITE_UTF8|(nc*SQLITE_FUNC_NEEDCOLL)|f, \ 1947 SQLITE_INT_TO_PTR(arg), 0, xStep,xFinal,xValue,xInverse,#zName, {0}} 1948 #define INTERNAL_FUNCTION(zName, nArg, xFunc) \ 1949 {nArg, SQLITE_FUNC_INTERNAL|SQLITE_UTF8|SQLITE_FUNC_CONSTANT, \ 1950 0, 0, xFunc, 0, 0, 0, #zName, {0} } 1951 1952 1953 /* 1954 ** All current savepoints are stored in a linked list starting at 1955 ** sqlite3.pSavepoint. The first element in the list is the most recently 1956 ** opened savepoint. Savepoints are added to the list by the vdbe 1957 ** OP_Savepoint instruction. 1958 */ 1959 struct Savepoint { 1960 char *zName; /* Savepoint name (nul-terminated) */ 1961 i64 nDeferredCons; /* Number of deferred fk violations */ 1962 i64 nDeferredImmCons; /* Number of deferred imm fk. */ 1963 Savepoint *pNext; /* Parent savepoint (if any) */ 1964 }; 1965 1966 /* 1967 ** The following are used as the second parameter to sqlite3Savepoint(), 1968 ** and as the P1 argument to the OP_Savepoint instruction. 1969 */ 1970 #define SAVEPOINT_BEGIN 0 1971 #define SAVEPOINT_RELEASE 1 1972 #define SAVEPOINT_ROLLBACK 2 1973 1974 1975 /* 1976 ** Each SQLite module (virtual table definition) is defined by an 1977 ** instance of the following structure, stored in the sqlite3.aModule 1978 ** hash table. 1979 */ 1980 struct Module { 1981 const sqlite3_module *pModule; /* Callback pointers */ 1982 const char *zName; /* Name passed to create_module() */ 1983 int nRefModule; /* Number of pointers to this object */ 1984 void *pAux; /* pAux passed to create_module() */ 1985 void (*xDestroy)(void *); /* Module destructor function */ 1986 Table *pEpoTab; /* Eponymous table for this module */ 1987 }; 1988 1989 /* 1990 ** Information about each column of an SQL table is held in an instance 1991 ** of the Column structure, in the Table.aCol[] array. 1992 ** 1993 ** Definitions: 1994 ** 1995 ** "table column index" This is the index of the column in the 1996 ** Table.aCol[] array, and also the index of 1997 ** the column in the original CREATE TABLE stmt. 1998 ** 1999 ** "storage column index" This is the index of the column in the 2000 ** record BLOB generated by the OP_MakeRecord 2001 ** opcode. The storage column index is less than 2002 ** or equal to the table column index. It is 2003 ** equal if and only if there are no VIRTUAL 2004 ** columns to the left. 2005 */ 2006 struct Column { 2007 char *zName; /* Name of this column, \000, then the type */ 2008 Expr *pDflt; /* Default value or GENERATED ALWAYS AS value */ 2009 char *zColl; /* Collating sequence. If NULL, use the default */ 2010 u8 notNull; /* An OE_ code for handling a NOT NULL constraint */ 2011 char affinity; /* One of the SQLITE_AFF_... values */ 2012 u8 szEst; /* Estimated size of value in this column. sizeof(INT)==1 */ 2013 u8 hName; /* Column name hash for faster lookup */ 2014 u16 colFlags; /* Boolean properties. See COLFLAG_ defines below */ 2015 }; 2016 2017 /* Allowed values for Column.colFlags: 2018 */ 2019 #define COLFLAG_PRIMKEY 0x0001 /* Column is part of the primary key */ 2020 #define COLFLAG_HIDDEN 0x0002 /* A hidden column in a virtual table */ 2021 #define COLFLAG_HASTYPE 0x0004 /* Type name follows column name */ 2022 #define COLFLAG_UNIQUE 0x0008 /* Column def contains "UNIQUE" or "PK" */ 2023 #define COLFLAG_SORTERREF 0x0010 /* Use sorter-refs with this column */ 2024 #define COLFLAG_VIRTUAL 0x0020 /* GENERATED ALWAYS AS ... VIRTUAL */ 2025 #define COLFLAG_STORED 0x0040 /* GENERATED ALWAYS AS ... STORED */ 2026 #define COLFLAG_NOTAVAIL 0x0080 /* STORED column not yet calculated */ 2027 #define COLFLAG_BUSY 0x0100 /* Blocks recursion on GENERATED columns */ 2028 #define COLFLAG_GENERATED 0x0060 /* Combo: _STORED, _VIRTUAL */ 2029 #define COLFLAG_NOINSERT 0x0062 /* Combo: _HIDDEN, _STORED, _VIRTUAL */ 2030 2031 /* 2032 ** A "Collating Sequence" is defined by an instance of the following 2033 ** structure. Conceptually, a collating sequence consists of a name and 2034 ** a comparison routine that defines the order of that sequence. 2035 ** 2036 ** If CollSeq.xCmp is NULL, it means that the 2037 ** collating sequence is undefined. Indices built on an undefined 2038 ** collating sequence may not be read or written. 2039 */ 2040 struct CollSeq { 2041 char *zName; /* Name of the collating sequence, UTF-8 encoded */ 2042 u8 enc; /* Text encoding handled by xCmp() */ 2043 void *pUser; /* First argument to xCmp() */ 2044 int (*xCmp)(void*,int, const void*, int, const void*); 2045 void (*xDel)(void*); /* Destructor for pUser */ 2046 }; 2047 2048 /* 2049 ** A sort order can be either ASC or DESC. 2050 */ 2051 #define SQLITE_SO_ASC 0 /* Sort in ascending order */ 2052 #define SQLITE_SO_DESC 1 /* Sort in ascending order */ 2053 #define SQLITE_SO_UNDEFINED -1 /* No sort order specified */ 2054 2055 /* 2056 ** Column affinity types. 2057 ** 2058 ** These used to have mnemonic name like 'i' for SQLITE_AFF_INTEGER and 2059 ** 't' for SQLITE_AFF_TEXT. But we can save a little space and improve 2060 ** the speed a little by numbering the values consecutively. 2061 ** 2062 ** But rather than start with 0 or 1, we begin with 'A'. That way, 2063 ** when multiple affinity types are concatenated into a string and 2064 ** used as the P4 operand, they will be more readable. 2065 ** 2066 ** Note also that the numeric types are grouped together so that testing 2067 ** for a numeric type is a single comparison. And the BLOB type is first. 2068 */ 2069 #define SQLITE_AFF_NONE 0x40 /* '@' */ 2070 #define SQLITE_AFF_BLOB 0x41 /* 'A' */ 2071 #define SQLITE_AFF_TEXT 0x42 /* 'B' */ 2072 #define SQLITE_AFF_NUMERIC 0x43 /* 'C' */ 2073 #define SQLITE_AFF_INTEGER 0x44 /* 'D' */ 2074 #define SQLITE_AFF_REAL 0x45 /* 'E' */ 2075 2076 #define sqlite3IsNumericAffinity(X) ((X)>=SQLITE_AFF_NUMERIC) 2077 2078 /* 2079 ** The SQLITE_AFF_MASK values masks off the significant bits of an 2080 ** affinity value. 2081 */ 2082 #define SQLITE_AFF_MASK 0x47 2083 2084 /* 2085 ** Additional bit values that can be ORed with an affinity without 2086 ** changing the affinity. 2087 ** 2088 ** The SQLITE_NOTNULL flag is a combination of NULLEQ and JUMPIFNULL. 2089 ** It causes an assert() to fire if either operand to a comparison 2090 ** operator is NULL. It is added to certain comparison operators to 2091 ** prove that the operands are always NOT NULL. 2092 */ 2093 #define SQLITE_KEEPNULL 0x08 /* Used by vector == or <> */ 2094 #define SQLITE_JUMPIFNULL 0x10 /* jumps if either operand is NULL */ 2095 #define SQLITE_STOREP2 0x20 /* Store result in reg[P2] rather than jump */ 2096 #define SQLITE_NULLEQ 0x80 /* NULL=NULL */ 2097 #define SQLITE_NOTNULL 0x90 /* Assert that operands are never NULL */ 2098 2099 /* 2100 ** An object of this type is created for each virtual table present in 2101 ** the database schema. 2102 ** 2103 ** If the database schema is shared, then there is one instance of this 2104 ** structure for each database connection (sqlite3*) that uses the shared 2105 ** schema. This is because each database connection requires its own unique 2106 ** instance of the sqlite3_vtab* handle used to access the virtual table 2107 ** implementation. sqlite3_vtab* handles can not be shared between 2108 ** database connections, even when the rest of the in-memory database 2109 ** schema is shared, as the implementation often stores the database 2110 ** connection handle passed to it via the xConnect() or xCreate() method 2111 ** during initialization internally. This database connection handle may 2112 ** then be used by the virtual table implementation to access real tables 2113 ** within the database. So that they appear as part of the callers 2114 ** transaction, these accesses need to be made via the same database 2115 ** connection as that used to execute SQL operations on the virtual table. 2116 ** 2117 ** All VTable objects that correspond to a single table in a shared 2118 ** database schema are initially stored in a linked-list pointed to by 2119 ** the Table.pVTable member variable of the corresponding Table object. 2120 ** When an sqlite3_prepare() operation is required to access the virtual 2121 ** table, it searches the list for the VTable that corresponds to the 2122 ** database connection doing the preparing so as to use the correct 2123 ** sqlite3_vtab* handle in the compiled query. 2124 ** 2125 ** When an in-memory Table object is deleted (for example when the 2126 ** schema is being reloaded for some reason), the VTable objects are not 2127 ** deleted and the sqlite3_vtab* handles are not xDisconnect()ed 2128 ** immediately. Instead, they are moved from the Table.pVTable list to 2129 ** another linked list headed by the sqlite3.pDisconnect member of the 2130 ** corresponding sqlite3 structure. They are then deleted/xDisconnected 2131 ** next time a statement is prepared using said sqlite3*. This is done 2132 ** to avoid deadlock issues involving multiple sqlite3.mutex mutexes. 2133 ** Refer to comments above function sqlite3VtabUnlockList() for an 2134 ** explanation as to why it is safe to add an entry to an sqlite3.pDisconnect 2135 ** list without holding the corresponding sqlite3.mutex mutex. 2136 ** 2137 ** The memory for objects of this type is always allocated by 2138 ** sqlite3DbMalloc(), using the connection handle stored in VTable.db as 2139 ** the first argument. 2140 */ 2141 struct VTable { 2142 sqlite3 *db; /* Database connection associated with this table */ 2143 Module *pMod; /* Pointer to module implementation */ 2144 sqlite3_vtab *pVtab; /* Pointer to vtab instance */ 2145 int nRef; /* Number of pointers to this structure */ 2146 u8 bConstraint; /* True if constraints are supported */ 2147 u8 eVtabRisk; /* Riskiness of allowing hacker access */ 2148 int iSavepoint; /* Depth of the SAVEPOINT stack */ 2149 VTable *pNext; /* Next in linked list (see above) */ 2150 }; 2151 2152 /* Allowed values for VTable.eVtabRisk 2153 */ 2154 #define SQLITE_VTABRISK_Low 0 2155 #define SQLITE_VTABRISK_Normal 1 2156 #define SQLITE_VTABRISK_High 2 2157 2158 /* 2159 ** The schema for each SQL table and view is represented in memory 2160 ** by an instance of the following structure. 2161 */ 2162 struct Table { 2163 char *zName; /* Name of the table or view */ 2164 Column *aCol; /* Information about each column */ 2165 Index *pIndex; /* List of SQL indexes on this table. */ 2166 Select *pSelect; /* NULL for tables. Points to definition if a view. */ 2167 FKey *pFKey; /* Linked list of all foreign keys in this table */ 2168 char *zColAff; /* String defining the affinity of each column */ 2169 ExprList *pCheck; /* All CHECK constraints */ 2170 /* ... also used as column name list in a VIEW */ 2171 Pgno tnum; /* Root BTree page for this table */ 2172 u32 nTabRef; /* Number of pointers to this Table */ 2173 u32 tabFlags; /* Mask of TF_* values */ 2174 i16 iPKey; /* If not negative, use aCol[iPKey] as the rowid */ 2175 i16 nCol; /* Number of columns in this table */ 2176 i16 nNVCol; /* Number of columns that are not VIRTUAL */ 2177 LogEst nRowLogEst; /* Estimated rows in table - from sqlite_stat1 table */ 2178 LogEst szTabRow; /* Estimated size of each table row in bytes */ 2179 #ifdef SQLITE_ENABLE_COSTMULT 2180 LogEst costMult; /* Cost multiplier for using this table */ 2181 #endif 2182 u8 keyConf; /* What to do in case of uniqueness conflict on iPKey */ 2183 #ifndef SQLITE_OMIT_ALTERTABLE 2184 int addColOffset; /* Offset in CREATE TABLE stmt to add a new column */ 2185 #endif 2186 #ifndef SQLITE_OMIT_VIRTUALTABLE 2187 int nModuleArg; /* Number of arguments to the module */ 2188 char **azModuleArg; /* 0: module 1: schema 2: vtab name 3...: args */ 2189 VTable *pVTable; /* List of VTable objects. */ 2190 #endif 2191 Trigger *pTrigger; /* List of triggers stored in pSchema */ 2192 Schema *pSchema; /* Schema that contains this table */ 2193 }; 2194 2195 /* 2196 ** Allowed values for Table.tabFlags. 2197 ** 2198 ** TF_OOOHidden applies to tables or view that have hidden columns that are 2199 ** followed by non-hidden columns. Example: "CREATE VIRTUAL TABLE x USING 2200 ** vtab1(a HIDDEN, b);". Since "b" is a non-hidden column but "a" is hidden, 2201 ** the TF_OOOHidden attribute would apply in this case. Such tables require 2202 ** special handling during INSERT processing. The "OOO" means "Out Of Order". 2203 ** 2204 ** Constraints: 2205 ** 2206 ** TF_HasVirtual == COLFLAG_Virtual 2207 ** TF_HasStored == COLFLAG_Stored 2208 */ 2209 #define TF_Readonly 0x0001 /* Read-only system table */ 2210 #define TF_Ephemeral 0x0002 /* An ephemeral table */ 2211 #define TF_HasPrimaryKey 0x0004 /* Table has a primary key */ 2212 #define TF_Autoincrement 0x0008 /* Integer primary key is autoincrement */ 2213 #define TF_HasStat1 0x0010 /* nRowLogEst set from sqlite_stat1 */ 2214 #define TF_HasVirtual 0x0020 /* Has one or more VIRTUAL columns */ 2215 #define TF_HasStored 0x0040 /* Has one or more STORED columns */ 2216 #define TF_HasGenerated 0x0060 /* Combo: HasVirtual + HasStored */ 2217 #define TF_WithoutRowid 0x0080 /* No rowid. PRIMARY KEY is the key */ 2218 #define TF_StatsUsed 0x0100 /* Query planner decisions affected by 2219 ** Index.aiRowLogEst[] values */ 2220 #define TF_NoVisibleRowid 0x0200 /* No user-visible "rowid" column */ 2221 #define TF_OOOHidden 0x0400 /* Out-of-Order hidden columns */ 2222 #define TF_HasNotNull 0x0800 /* Contains NOT NULL constraints */ 2223 #define TF_Shadow 0x1000 /* True for a shadow table */ 2224 #define TF_HasStat4 0x2000 /* STAT4 info available for this table */ 2225 2226 /* 2227 ** Test to see whether or not a table is a virtual table. This is 2228 ** done as a macro so that it will be optimized out when virtual 2229 ** table support is omitted from the build. 2230 */ 2231 #ifndef SQLITE_OMIT_VIRTUALTABLE 2232 # define IsVirtual(X) ((X)->nModuleArg) 2233 # define ExprIsVtab(X) \ 2234 ((X)->op==TK_COLUMN && (X)->y.pTab!=0 && (X)->y.pTab->nModuleArg) 2235 #else 2236 # define IsVirtual(X) 0 2237 # define ExprIsVtab(X) 0 2238 #endif 2239 2240 /* 2241 ** Macros to determine if a column is hidden. IsOrdinaryHiddenColumn() 2242 ** only works for non-virtual tables (ordinary tables and views) and is 2243 ** always false unless SQLITE_ENABLE_HIDDEN_COLUMNS is defined. The 2244 ** IsHiddenColumn() macro is general purpose. 2245 */ 2246 #if defined(SQLITE_ENABLE_HIDDEN_COLUMNS) 2247 # define IsHiddenColumn(X) (((X)->colFlags & COLFLAG_HIDDEN)!=0) 2248 # define IsOrdinaryHiddenColumn(X) (((X)->colFlags & COLFLAG_HIDDEN)!=0) 2249 #elif !defined(SQLITE_OMIT_VIRTUALTABLE) 2250 # define IsHiddenColumn(X) (((X)->colFlags & COLFLAG_HIDDEN)!=0) 2251 # define IsOrdinaryHiddenColumn(X) 0 2252 #else 2253 # define IsHiddenColumn(X) 0 2254 # define IsOrdinaryHiddenColumn(X) 0 2255 #endif 2256 2257 2258 /* Does the table have a rowid */ 2259 #define HasRowid(X) (((X)->tabFlags & TF_WithoutRowid)==0) 2260 #define VisibleRowid(X) (((X)->tabFlags & TF_NoVisibleRowid)==0) 2261 2262 /* 2263 ** Each foreign key constraint is an instance of the following structure. 2264 ** 2265 ** A foreign key is associated with two tables. The "from" table is 2266 ** the table that contains the REFERENCES clause that creates the foreign 2267 ** key. The "to" table is the table that is named in the REFERENCES clause. 2268 ** Consider this example: 2269 ** 2270 ** CREATE TABLE ex1( 2271 ** a INTEGER PRIMARY KEY, 2272 ** b INTEGER CONSTRAINT fk1 REFERENCES ex2(x) 2273 ** ); 2274 ** 2275 ** For foreign key "fk1", the from-table is "ex1" and the to-table is "ex2". 2276 ** Equivalent names: 2277 ** 2278 ** from-table == child-table 2279 ** to-table == parent-table 2280 ** 2281 ** Each REFERENCES clause generates an instance of the following structure 2282 ** which is attached to the from-table. The to-table need not exist when 2283 ** the from-table is created. The existence of the to-table is not checked. 2284 ** 2285 ** The list of all parents for child Table X is held at X.pFKey. 2286 ** 2287 ** A list of all children for a table named Z (which might not even exist) 2288 ** is held in Schema.fkeyHash with a hash key of Z. 2289 */ 2290 struct FKey { 2291 Table *pFrom; /* Table containing the REFERENCES clause (aka: Child) */ 2292 FKey *pNextFrom; /* Next FKey with the same in pFrom. Next parent of pFrom */ 2293 char *zTo; /* Name of table that the key points to (aka: Parent) */ 2294 FKey *pNextTo; /* Next with the same zTo. Next child of zTo. */ 2295 FKey *pPrevTo; /* Previous with the same zTo */ 2296 int nCol; /* Number of columns in this key */ 2297 /* EV: R-30323-21917 */ 2298 u8 isDeferred; /* True if constraint checking is deferred till COMMIT */ 2299 u8 aAction[2]; /* ON DELETE and ON UPDATE actions, respectively */ 2300 Trigger *apTrigger[2];/* Triggers for aAction[] actions */ 2301 struct sColMap { /* Mapping of columns in pFrom to columns in zTo */ 2302 int iFrom; /* Index of column in pFrom */ 2303 char *zCol; /* Name of column in zTo. If NULL use PRIMARY KEY */ 2304 } aCol[1]; /* One entry for each of nCol columns */ 2305 }; 2306 2307 /* 2308 ** SQLite supports many different ways to resolve a constraint 2309 ** error. ROLLBACK processing means that a constraint violation 2310 ** causes the operation in process to fail and for the current transaction 2311 ** to be rolled back. ABORT processing means the operation in process 2312 ** fails and any prior changes from that one operation are backed out, 2313 ** but the transaction is not rolled back. FAIL processing means that 2314 ** the operation in progress stops and returns an error code. But prior 2315 ** changes due to the same operation are not backed out and no rollback 2316 ** occurs. IGNORE means that the particular row that caused the constraint 2317 ** error is not inserted or updated. Processing continues and no error 2318 ** is returned. REPLACE means that preexisting database rows that caused 2319 ** a UNIQUE constraint violation are removed so that the new insert or 2320 ** update can proceed. Processing continues and no error is reported. 2321 ** UPDATE applies to insert operations only and means that the insert 2322 ** is omitted and the DO UPDATE clause of an upsert is run instead. 2323 ** 2324 ** RESTRICT, SETNULL, SETDFLT, and CASCADE actions apply only to foreign keys. 2325 ** RESTRICT is the same as ABORT for IMMEDIATE foreign keys and the 2326 ** same as ROLLBACK for DEFERRED keys. SETNULL means that the foreign 2327 ** key is set to NULL. SETDFLT means that the foreign key is set 2328 ** to its default value. CASCADE means that a DELETE or UPDATE of the 2329 ** referenced table row is propagated into the row that holds the 2330 ** foreign key. 2331 ** 2332 ** The OE_Default value is a place holder that means to use whatever 2333 ** conflict resolution algorthm is required from context. 2334 ** 2335 ** The following symbolic values are used to record which type 2336 ** of conflict resolution action to take. 2337 */ 2338 #define OE_None 0 /* There is no constraint to check */ 2339 #define OE_Rollback 1 /* Fail the operation and rollback the transaction */ 2340 #define OE_Abort 2 /* Back out changes but do no rollback transaction */ 2341 #define OE_Fail 3 /* Stop the operation but leave all prior changes */ 2342 #define OE_Ignore 4 /* Ignore the error. Do not do the INSERT or UPDATE */ 2343 #define OE_Replace 5 /* Delete existing record, then do INSERT or UPDATE */ 2344 #define OE_Update 6 /* Process as a DO UPDATE in an upsert */ 2345 #define OE_Restrict 7 /* OE_Abort for IMMEDIATE, OE_Rollback for DEFERRED */ 2346 #define OE_SetNull 8 /* Set the foreign key value to NULL */ 2347 #define OE_SetDflt 9 /* Set the foreign key value to its default */ 2348 #define OE_Cascade 10 /* Cascade the changes */ 2349 #define OE_Default 11 /* Do whatever the default action is */ 2350 2351 2352 /* 2353 ** An instance of the following structure is passed as the first 2354 ** argument to sqlite3VdbeKeyCompare and is used to control the 2355 ** comparison of the two index keys. 2356 ** 2357 ** Note that aSortOrder[] and aColl[] have nField+1 slots. There 2358 ** are nField slots for the columns of an index then one extra slot 2359 ** for the rowid at the end. 2360 */ 2361 struct KeyInfo { 2362 u32 nRef; /* Number of references to this KeyInfo object */ 2363 u8 enc; /* Text encoding - one of the SQLITE_UTF* values */ 2364 u16 nKeyField; /* Number of key columns in the index */ 2365 u16 nAllField; /* Total columns, including key plus others */ 2366 sqlite3 *db; /* The database connection */ 2367 u8 *aSortFlags; /* Sort order for each column. */ 2368 CollSeq *aColl[1]; /* Collating sequence for each term of the key */ 2369 }; 2370 2371 /* 2372 ** Allowed bit values for entries in the KeyInfo.aSortFlags[] array. 2373 */ 2374 #define KEYINFO_ORDER_DESC 0x01 /* DESC sort order */ 2375 #define KEYINFO_ORDER_BIGNULL 0x02 /* NULL is larger than any other value */ 2376 2377 /* 2378 ** This object holds a record which has been parsed out into individual 2379 ** fields, for the purposes of doing a comparison. 2380 ** 2381 ** A record is an object that contains one or more fields of data. 2382 ** Records are used to store the content of a table row and to store 2383 ** the key of an index. A blob encoding of a record is created by 2384 ** the OP_MakeRecord opcode of the VDBE and is disassembled by the 2385 ** OP_Column opcode. 2386 ** 2387 ** An instance of this object serves as a "key" for doing a search on 2388 ** an index b+tree. The goal of the search is to find the entry that 2389 ** is closed to the key described by this object. This object might hold 2390 ** just a prefix of the key. The number of fields is given by 2391 ** pKeyInfo->nField. 2392 ** 2393 ** The r1 and r2 fields are the values to return if this key is less than 2394 ** or greater than a key in the btree, respectively. These are normally 2395 ** -1 and +1 respectively, but might be inverted to +1 and -1 if the b-tree 2396 ** is in DESC order. 2397 ** 2398 ** The key comparison functions actually return default_rc when they find 2399 ** an equals comparison. default_rc can be -1, 0, or +1. If there are 2400 ** multiple entries in the b-tree with the same key (when only looking 2401 ** at the first pKeyInfo->nFields,) then default_rc can be set to -1 to 2402 ** cause the search to find the last match, or +1 to cause the search to 2403 ** find the first match. 2404 ** 2405 ** The key comparison functions will set eqSeen to true if they ever 2406 ** get and equal results when comparing this structure to a b-tree record. 2407 ** When default_rc!=0, the search might end up on the record immediately 2408 ** before the first match or immediately after the last match. The 2409 ** eqSeen field will indicate whether or not an exact match exists in the 2410 ** b-tree. 2411 */ 2412 struct UnpackedRecord { 2413 KeyInfo *pKeyInfo; /* Collation and sort-order information */ 2414 Mem *aMem; /* Values */ 2415 u16 nField; /* Number of entries in apMem[] */ 2416 i8 default_rc; /* Comparison result if keys are equal */ 2417 u8 errCode; /* Error detected by xRecordCompare (CORRUPT or NOMEM) */ 2418 i8 r1; /* Value to return if (lhs < rhs) */ 2419 i8 r2; /* Value to return if (lhs > rhs) */ 2420 u8 eqSeen; /* True if an equality comparison has been seen */ 2421 }; 2422 2423 2424 /* 2425 ** Each SQL index is represented in memory by an 2426 ** instance of the following structure. 2427 ** 2428 ** The columns of the table that are to be indexed are described 2429 ** by the aiColumn[] field of this structure. For example, suppose 2430 ** we have the following table and index: 2431 ** 2432 ** CREATE TABLE Ex1(c1 int, c2 int, c3 text); 2433 ** CREATE INDEX Ex2 ON Ex1(c3,c1); 2434 ** 2435 ** In the Table structure describing Ex1, nCol==3 because there are 2436 ** three columns in the table. In the Index structure describing 2437 ** Ex2, nColumn==2 since 2 of the 3 columns of Ex1 are indexed. 2438 ** The value of aiColumn is {2, 0}. aiColumn[0]==2 because the 2439 ** first column to be indexed (c3) has an index of 2 in Ex1.aCol[]. 2440 ** The second column to be indexed (c1) has an index of 0 in 2441 ** Ex1.aCol[], hence Ex2.aiColumn[1]==0. 2442 ** 2443 ** The Index.onError field determines whether or not the indexed columns 2444 ** must be unique and what to do if they are not. When Index.onError=OE_None, 2445 ** it means this is not a unique index. Otherwise it is a unique index 2446 ** and the value of Index.onError indicate the which conflict resolution 2447 ** algorithm to employ whenever an attempt is made to insert a non-unique 2448 ** element. 2449 ** 2450 ** While parsing a CREATE TABLE or CREATE INDEX statement in order to 2451 ** generate VDBE code (as opposed to parsing one read from an sqlite_schema 2452 ** table as part of parsing an existing database schema), transient instances 2453 ** of this structure may be created. In this case the Index.tnum variable is 2454 ** used to store the address of a VDBE instruction, not a database page 2455 ** number (it cannot - the database page is not allocated until the VDBE 2456 ** program is executed). See convertToWithoutRowidTable() for details. 2457 */ 2458 struct Index { 2459 char *zName; /* Name of this index */ 2460 i16 *aiColumn; /* Which columns are used by this index. 1st is 0 */ 2461 LogEst *aiRowLogEst; /* From ANALYZE: Est. rows selected by each column */ 2462 Table *pTable; /* The SQL table being indexed */ 2463 char *zColAff; /* String defining the affinity of each column */ 2464 Index *pNext; /* The next index associated with the same table */ 2465 Schema *pSchema; /* Schema containing this index */ 2466 u8 *aSortOrder; /* for each column: True==DESC, False==ASC */ 2467 const char **azColl; /* Array of collation sequence names for index */ 2468 Expr *pPartIdxWhere; /* WHERE clause for partial indices */ 2469 ExprList *aColExpr; /* Column expressions */ 2470 Pgno tnum; /* DB Page containing root of this index */ 2471 LogEst szIdxRow; /* Estimated average row size in bytes */ 2472 u16 nKeyCol; /* Number of columns forming the key */ 2473 u16 nColumn; /* Number of columns stored in the index */ 2474 u8 onError; /* OE_Abort, OE_Ignore, OE_Replace, or OE_None */ 2475 unsigned idxType:2; /* 0:Normal 1:UNIQUE, 2:PRIMARY KEY, 3:IPK */ 2476 unsigned bUnordered:1; /* Use this index for == or IN queries only */ 2477 unsigned uniqNotNull:1; /* True if UNIQUE and NOT NULL for all columns */ 2478 unsigned isResized:1; /* True if resizeIndexObject() has been called */ 2479 unsigned isCovering:1; /* True if this is a covering index */ 2480 unsigned noSkipScan:1; /* Do not try to use skip-scan if true */ 2481 unsigned hasStat1:1; /* aiRowLogEst values come from sqlite_stat1 */ 2482 unsigned bNoQuery:1; /* Do not use this index to optimize queries */ 2483 unsigned bAscKeyBug:1; /* True if the bba7b69f9849b5bf bug applies */ 2484 unsigned bHasVCol:1; /* Index references one or more VIRTUAL columns */ 2485 #ifdef SQLITE_ENABLE_STAT4 2486 int nSample; /* Number of elements in aSample[] */ 2487 int nSampleCol; /* Size of IndexSample.anEq[] and so on */ 2488 tRowcnt *aAvgEq; /* Average nEq values for keys not in aSample */ 2489 IndexSample *aSample; /* Samples of the left-most key */ 2490 tRowcnt *aiRowEst; /* Non-logarithmic stat1 data for this index */ 2491 tRowcnt nRowEst0; /* Non-logarithmic number of rows in the index */ 2492 #endif 2493 Bitmask colNotIdxed; /* 0 for unindexed columns in pTab */ 2494 }; 2495 2496 /* 2497 ** Allowed values for Index.idxType 2498 */ 2499 #define SQLITE_IDXTYPE_APPDEF 0 /* Created using CREATE INDEX */ 2500 #define SQLITE_IDXTYPE_UNIQUE 1 /* Implements a UNIQUE constraint */ 2501 #define SQLITE_IDXTYPE_PRIMARYKEY 2 /* Is the PRIMARY KEY for the table */ 2502 #define SQLITE_IDXTYPE_IPK 3 /* INTEGER PRIMARY KEY index */ 2503 2504 /* Return true if index X is a PRIMARY KEY index */ 2505 #define IsPrimaryKeyIndex(X) ((X)->idxType==SQLITE_IDXTYPE_PRIMARYKEY) 2506 2507 /* Return true if index X is a UNIQUE index */ 2508 #define IsUniqueIndex(X) ((X)->onError!=OE_None) 2509 2510 /* The Index.aiColumn[] values are normally positive integer. But 2511 ** there are some negative values that have special meaning: 2512 */ 2513 #define XN_ROWID (-1) /* Indexed column is the rowid */ 2514 #define XN_EXPR (-2) /* Indexed column is an expression */ 2515 2516 /* 2517 ** Each sample stored in the sqlite_stat4 table is represented in memory 2518 ** using a structure of this type. See documentation at the top of the 2519 ** analyze.c source file for additional information. 2520 */ 2521 struct IndexSample { 2522 void *p; /* Pointer to sampled record */ 2523 int n; /* Size of record in bytes */ 2524 tRowcnt *anEq; /* Est. number of rows where the key equals this sample */ 2525 tRowcnt *anLt; /* Est. number of rows where key is less than this sample */ 2526 tRowcnt *anDLt; /* Est. number of distinct keys less than this sample */ 2527 }; 2528 2529 /* 2530 ** Possible values to use within the flags argument to sqlite3GetToken(). 2531 */ 2532 #define SQLITE_TOKEN_QUOTED 0x1 /* Token is a quoted identifier. */ 2533 #define SQLITE_TOKEN_KEYWORD 0x2 /* Token is a keyword. */ 2534 2535 /* 2536 ** Each token coming out of the lexer is an instance of 2537 ** this structure. Tokens are also used as part of an expression. 2538 ** 2539 ** The memory that "z" points to is owned by other objects. Take care 2540 ** that the owner of the "z" string does not deallocate the string before 2541 ** the Token goes out of scope! Very often, the "z" points to some place 2542 ** in the middle of the Parse.zSql text. But it might also point to a 2543 ** static string. 2544 */ 2545 struct Token { 2546 const char *z; /* Text of the token. Not NULL-terminated! */ 2547 unsigned int n; /* Number of characters in this token */ 2548 }; 2549 2550 /* 2551 ** An instance of this structure contains information needed to generate 2552 ** code for a SELECT that contains aggregate functions. 2553 ** 2554 ** If Expr.op==TK_AGG_COLUMN or TK_AGG_FUNCTION then Expr.pAggInfo is a 2555 ** pointer to this structure. The Expr.iAgg field is the index in 2556 ** AggInfo.aCol[] or AggInfo.aFunc[] of information needed to generate 2557 ** code for that node. 2558 ** 2559 ** AggInfo.pGroupBy and AggInfo.aFunc.pExpr point to fields within the 2560 ** original Select structure that describes the SELECT statement. These 2561 ** fields do not need to be freed when deallocating the AggInfo structure. 2562 */ 2563 struct AggInfo { 2564 u8 directMode; /* Direct rendering mode means take data directly 2565 ** from source tables rather than from accumulators */ 2566 u8 useSortingIdx; /* In direct mode, reference the sorting index rather 2567 ** than the source table */ 2568 int sortingIdx; /* Cursor number of the sorting index */ 2569 int sortingIdxPTab; /* Cursor number of pseudo-table */ 2570 int nSortingColumn; /* Number of columns in the sorting index */ 2571 int mnReg, mxReg; /* Range of registers allocated for aCol and aFunc */ 2572 ExprList *pGroupBy; /* The group by clause */ 2573 struct AggInfo_col { /* For each column used in source tables */ 2574 Table *pTab; /* Source table */ 2575 Expr *pCExpr; /* The original expression */ 2576 int iTable; /* Cursor number of the source table */ 2577 int iMem; /* Memory location that acts as accumulator */ 2578 i16 iColumn; /* Column number within the source table */ 2579 i16 iSorterColumn; /* Column number in the sorting index */ 2580 } *aCol; 2581 int nColumn; /* Number of used entries in aCol[] */ 2582 int nAccumulator; /* Number of columns that show through to the output. 2583 ** Additional columns are used only as parameters to 2584 ** aggregate functions */ 2585 struct AggInfo_func { /* For each aggregate function */ 2586 Expr *pFExpr; /* Expression encoding the function */ 2587 FuncDef *pFunc; /* The aggregate function implementation */ 2588 int iMem; /* Memory location that acts as accumulator */ 2589 int iDistinct; /* Ephemeral table used to enforce DISTINCT */ 2590 } *aFunc; 2591 int nFunc; /* Number of entries in aFunc[] */ 2592 u32 selId; /* Select to which this AggInfo belongs */ 2593 AggInfo *pNext; /* Next in list of them all */ 2594 }; 2595 2596 /* 2597 ** The datatype ynVar is a signed integer, either 16-bit or 32-bit. 2598 ** Usually it is 16-bits. But if SQLITE_MAX_VARIABLE_NUMBER is greater 2599 ** than 32767 we have to make it 32-bit. 16-bit is preferred because 2600 ** it uses less memory in the Expr object, which is a big memory user 2601 ** in systems with lots of prepared statements. And few applications 2602 ** need more than about 10 or 20 variables. But some extreme users want 2603 ** to have prepared statements with over 32766 variables, and for them 2604 ** the option is available (at compile-time). 2605 */ 2606 #if SQLITE_MAX_VARIABLE_NUMBER<32767 2607 typedef i16 ynVar; 2608 #else 2609 typedef int ynVar; 2610 #endif 2611 2612 /* 2613 ** Each node of an expression in the parse tree is an instance 2614 ** of this structure. 2615 ** 2616 ** Expr.op is the opcode. The integer parser token codes are reused 2617 ** as opcodes here. For example, the parser defines TK_GE to be an integer 2618 ** code representing the ">=" operator. This same integer code is reused 2619 ** to represent the greater-than-or-equal-to operator in the expression 2620 ** tree. 2621 ** 2622 ** If the expression is an SQL literal (TK_INTEGER, TK_FLOAT, TK_BLOB, 2623 ** or TK_STRING), then Expr.token contains the text of the SQL literal. If 2624 ** the expression is a variable (TK_VARIABLE), then Expr.token contains the 2625 ** variable name. Finally, if the expression is an SQL function (TK_FUNCTION), 2626 ** then Expr.token contains the name of the function. 2627 ** 2628 ** Expr.pRight and Expr.pLeft are the left and right subexpressions of a 2629 ** binary operator. Either or both may be NULL. 2630 ** 2631 ** Expr.x.pList is a list of arguments if the expression is an SQL function, 2632 ** a CASE expression or an IN expression of the form "<lhs> IN (<y>, <z>...)". 2633 ** Expr.x.pSelect is used if the expression is a sub-select or an expression of 2634 ** the form "<lhs> IN (SELECT ...)". If the EP_xIsSelect bit is set in the 2635 ** Expr.flags mask, then Expr.x.pSelect is valid. Otherwise, Expr.x.pList is 2636 ** valid. 2637 ** 2638 ** An expression of the form ID or ID.ID refers to a column in a table. 2639 ** For such expressions, Expr.op is set to TK_COLUMN and Expr.iTable is 2640 ** the integer cursor number of a VDBE cursor pointing to that table and 2641 ** Expr.iColumn is the column number for the specific column. If the 2642 ** expression is used as a result in an aggregate SELECT, then the 2643 ** value is also stored in the Expr.iAgg column in the aggregate so that 2644 ** it can be accessed after all aggregates are computed. 2645 ** 2646 ** If the expression is an unbound variable marker (a question mark 2647 ** character '?' in the original SQL) then the Expr.iTable holds the index 2648 ** number for that variable. 2649 ** 2650 ** If the expression is a subquery then Expr.iColumn holds an integer 2651 ** register number containing the result of the subquery. If the 2652 ** subquery gives a constant result, then iTable is -1. If the subquery 2653 ** gives a different answer at different times during statement processing 2654 ** then iTable is the address of a subroutine that computes the subquery. 2655 ** 2656 ** If the Expr is of type OP_Column, and the table it is selecting from 2657 ** is a disk table or the "old.*" pseudo-table, then pTab points to the 2658 ** corresponding table definition. 2659 ** 2660 ** ALLOCATION NOTES: 2661 ** 2662 ** Expr objects can use a lot of memory space in database schema. To 2663 ** help reduce memory requirements, sometimes an Expr object will be 2664 ** truncated. And to reduce the number of memory allocations, sometimes 2665 ** two or more Expr objects will be stored in a single memory allocation, 2666 ** together with Expr.zToken strings. 2667 ** 2668 ** If the EP_Reduced and EP_TokenOnly flags are set when 2669 ** an Expr object is truncated. When EP_Reduced is set, then all 2670 ** the child Expr objects in the Expr.pLeft and Expr.pRight subtrees 2671 ** are contained within the same memory allocation. Note, however, that 2672 ** the subtrees in Expr.x.pList or Expr.x.pSelect are always separately 2673 ** allocated, regardless of whether or not EP_Reduced is set. 2674 */ 2675 struct Expr { 2676 u8 op; /* Operation performed by this node */ 2677 char affExpr; /* affinity, or RAISE type */ 2678 u8 op2; /* TK_REGISTER/TK_TRUTH: original value of Expr.op 2679 ** TK_COLUMN: the value of p5 for OP_Column 2680 ** TK_AGG_FUNCTION: nesting depth 2681 ** TK_FUNCTION: NC_SelfRef flag if needs OP_PureFunc */ 2682 #ifdef SQLITE_DEBUG 2683 u8 vvaFlags; /* Verification flags. */ 2684 #endif 2685 u32 flags; /* Various flags. EP_* See below */ 2686 union { 2687 char *zToken; /* Token value. Zero terminated and dequoted */ 2688 int iValue; /* Non-negative integer value if EP_IntValue */ 2689 } u; 2690 2691 /* If the EP_TokenOnly flag is set in the Expr.flags mask, then no 2692 ** space is allocated for the fields below this point. An attempt to 2693 ** access them will result in a segfault or malfunction. 2694 *********************************************************************/ 2695 2696 Expr *pLeft; /* Left subnode */ 2697 Expr *pRight; /* Right subnode */ 2698 union { 2699 ExprList *pList; /* op = IN, EXISTS, SELECT, CASE, FUNCTION, BETWEEN */ 2700 Select *pSelect; /* EP_xIsSelect and op = IN, EXISTS, SELECT */ 2701 } x; 2702 2703 /* If the EP_Reduced flag is set in the Expr.flags mask, then no 2704 ** space is allocated for the fields below this point. An attempt to 2705 ** access them will result in a segfault or malfunction. 2706 *********************************************************************/ 2707 2708 #if SQLITE_MAX_EXPR_DEPTH>0 2709 int nHeight; /* Height of the tree headed by this node */ 2710 #endif 2711 int iTable; /* TK_COLUMN: cursor number of table holding column 2712 ** TK_REGISTER: register number 2713 ** TK_TRIGGER: 1 -> new, 0 -> old 2714 ** EP_Unlikely: 134217728 times likelihood 2715 ** TK_IN: ephemerial table holding RHS 2716 ** TK_SELECT_COLUMN: Number of columns on the LHS 2717 ** TK_SELECT: 1st register of result vector */ 2718 ynVar iColumn; /* TK_COLUMN: column index. -1 for rowid. 2719 ** TK_VARIABLE: variable number (always >= 1). 2720 ** TK_SELECT_COLUMN: column of the result vector */ 2721 i16 iAgg; /* Which entry in pAggInfo->aCol[] or ->aFunc[] */ 2722 int iRightJoinTable; /* If EP_FromJoin, the right table of the join */ 2723 AggInfo *pAggInfo; /* Used by TK_AGG_COLUMN and TK_AGG_FUNCTION */ 2724 union { 2725 Table *pTab; /* TK_COLUMN: Table containing column. Can be NULL 2726 ** for a column of an index on an expression */ 2727 Window *pWin; /* EP_WinFunc: Window/Filter defn for a function */ 2728 struct { /* TK_IN, TK_SELECT, and TK_EXISTS */ 2729 int iAddr; /* Subroutine entry address */ 2730 int regReturn; /* Register used to hold return address */ 2731 } sub; 2732 } y; 2733 }; 2734 2735 /* 2736 ** The following are the meanings of bits in the Expr.flags field. 2737 ** Value restrictions: 2738 ** 2739 ** EP_Agg == NC_HasAgg == SF_HasAgg 2740 ** EP_Win == NC_HasWin 2741 */ 2742 #define EP_FromJoin 0x000001 /* Originates in ON/USING clause of outer join */ 2743 #define EP_Distinct 0x000002 /* Aggregate function with DISTINCT keyword */ 2744 #define EP_HasFunc 0x000004 /* Contains one or more functions of any kind */ 2745 #define EP_FixedCol 0x000008 /* TK_Column with a known fixed value */ 2746 #define EP_Agg 0x000010 /* Contains one or more aggregate functions */ 2747 #define EP_VarSelect 0x000020 /* pSelect is correlated, not constant */ 2748 #define EP_DblQuoted 0x000040 /* token.z was originally in "..." */ 2749 #define EP_InfixFunc 0x000080 /* True for an infix function: LIKE, GLOB, etc */ 2750 #define EP_Collate 0x000100 /* Tree contains a TK_COLLATE operator */ 2751 #define EP_Commuted 0x000200 /* Comparison operator has been commuted */ 2752 #define EP_IntValue 0x000400 /* Integer value contained in u.iValue */ 2753 #define EP_xIsSelect 0x000800 /* x.pSelect is valid (otherwise x.pList is) */ 2754 #define EP_Skip 0x001000 /* Operator does not contribute to affinity */ 2755 #define EP_Reduced 0x002000 /* Expr struct EXPR_REDUCEDSIZE bytes only */ 2756 #define EP_TokenOnly 0x004000 /* Expr struct EXPR_TOKENONLYSIZE bytes only */ 2757 #define EP_Win 0x008000 /* Contains window functions */ 2758 #define EP_MemToken 0x010000 /* Need to sqlite3DbFree() Expr.zToken */ 2759 #define EP_IfNullRow 0x020000 /* The TK_IF_NULL_ROW opcode */ 2760 #define EP_Unlikely 0x040000 /* unlikely() or likelihood() function */ 2761 #define EP_ConstFunc 0x080000 /* A SQLITE_FUNC_CONSTANT or _SLOCHNG function */ 2762 #define EP_CanBeNull 0x100000 /* Can be null despite NOT NULL constraint */ 2763 #define EP_Subquery 0x200000 /* Tree contains a TK_SELECT operator */ 2764 #define EP_Alias 0x400000 /* Is an alias for a result set column */ 2765 #define EP_Leaf 0x800000 /* Expr.pLeft, .pRight, .u.pSelect all NULL */ 2766 #define EP_WinFunc 0x1000000 /* TK_FUNCTION with Expr.y.pWin set */ 2767 #define EP_Subrtn 0x2000000 /* Uses Expr.y.sub. TK_IN, _SELECT, or _EXISTS */ 2768 #define EP_Quoted 0x4000000 /* TK_ID was originally quoted */ 2769 #define EP_Static 0x8000000 /* Held in memory not obtained from malloc() */ 2770 #define EP_IsTrue 0x10000000 /* Always has boolean value of TRUE */ 2771 #define EP_IsFalse 0x20000000 /* Always has boolean value of FALSE */ 2772 #define EP_FromDDL 0x40000000 /* Originates from sqlite_schema */ 2773 /* 0x80000000 // Available */ 2774 2775 /* 2776 ** The EP_Propagate mask is a set of properties that automatically propagate 2777 ** upwards into parent nodes. 2778 */ 2779 #define EP_Propagate (EP_Collate|EP_Subquery|EP_HasFunc) 2780 2781 /* 2782 ** These macros can be used to test, set, or clear bits in the 2783 ** Expr.flags field. 2784 */ 2785 #define ExprHasProperty(E,P) (((E)->flags&(P))!=0) 2786 #define ExprHasAllProperty(E,P) (((E)->flags&(P))==(P)) 2787 #define ExprSetProperty(E,P) (E)->flags|=(P) 2788 #define ExprClearProperty(E,P) (E)->flags&=~(P) 2789 #define ExprAlwaysTrue(E) (((E)->flags&(EP_FromJoin|EP_IsTrue))==EP_IsTrue) 2790 #define ExprAlwaysFalse(E) (((E)->flags&(EP_FromJoin|EP_IsFalse))==EP_IsFalse) 2791 2792 2793 /* Flags for use with Expr.vvaFlags 2794 */ 2795 #define EP_NoReduce 0x01 /* Cannot EXPRDUP_REDUCE this Expr */ 2796 #define EP_Immutable 0x02 /* Do not change this Expr node */ 2797 2798 /* The ExprSetVVAProperty() macro is used for Verification, Validation, 2799 ** and Accreditation only. It works like ExprSetProperty() during VVA 2800 ** processes but is a no-op for delivery. 2801 */ 2802 #ifdef SQLITE_DEBUG 2803 # define ExprSetVVAProperty(E,P) (E)->vvaFlags|=(P) 2804 # define ExprHasVVAProperty(E,P) (((E)->vvaFlags&(P))!=0) 2805 # define ExprClearVVAProperties(E) (E)->vvaFlags = 0 2806 #else 2807 # define ExprSetVVAProperty(E,P) 2808 # define ExprHasVVAProperty(E,P) 0 2809 # define ExprClearVVAProperties(E) 2810 #endif 2811 2812 /* 2813 ** Macros to determine the number of bytes required by a normal Expr 2814 ** struct, an Expr struct with the EP_Reduced flag set in Expr.flags 2815 ** and an Expr struct with the EP_TokenOnly flag set. 2816 */ 2817 #define EXPR_FULLSIZE sizeof(Expr) /* Full size */ 2818 #define EXPR_REDUCEDSIZE offsetof(Expr,iTable) /* Common features */ 2819 #define EXPR_TOKENONLYSIZE offsetof(Expr,pLeft) /* Fewer features */ 2820 2821 /* 2822 ** Flags passed to the sqlite3ExprDup() function. See the header comment 2823 ** above sqlite3ExprDup() for details. 2824 */ 2825 #define EXPRDUP_REDUCE 0x0001 /* Used reduced-size Expr nodes */ 2826 2827 /* 2828 ** True if the expression passed as an argument was a function with 2829 ** an OVER() clause (a window function). 2830 */ 2831 #ifdef SQLITE_OMIT_WINDOWFUNC 2832 # define IsWindowFunc(p) 0 2833 #else 2834 # define IsWindowFunc(p) ( \ 2835 ExprHasProperty((p), EP_WinFunc) && p->y.pWin->eFrmType!=TK_FILTER \ 2836 ) 2837 #endif 2838 2839 /* 2840 ** A list of expressions. Each expression may optionally have a 2841 ** name. An expr/name combination can be used in several ways, such 2842 ** as the list of "expr AS ID" fields following a "SELECT" or in the 2843 ** list of "ID = expr" items in an UPDATE. A list of expressions can 2844 ** also be used as the argument to a function, in which case the a.zName 2845 ** field is not used. 2846 ** 2847 ** In order to try to keep memory usage down, the Expr.a.zEName field 2848 ** is used for multiple purposes: 2849 ** 2850 ** eEName Usage 2851 ** ---------- ------------------------- 2852 ** ENAME_NAME (1) the AS of result set column 2853 ** (2) COLUMN= of an UPDATE 2854 ** 2855 ** ENAME_TAB DB.TABLE.NAME used to resolve names 2856 ** of subqueries 2857 ** 2858 ** ENAME_SPAN Text of the original result set 2859 ** expression. 2860 */ 2861 struct ExprList { 2862 int nExpr; /* Number of expressions on the list */ 2863 struct ExprList_item { /* For each expression in the list */ 2864 Expr *pExpr; /* The parse tree for this expression */ 2865 char *zEName; /* Token associated with this expression */ 2866 u8 sortFlags; /* Mask of KEYINFO_ORDER_* flags */ 2867 unsigned eEName :2; /* Meaning of zEName */ 2868 unsigned done :1; /* A flag to indicate when processing is finished */ 2869 unsigned reusable :1; /* Constant expression is reusable */ 2870 unsigned bSorterRef :1; /* Defer evaluation until after sorting */ 2871 unsigned bNulls: 1; /* True if explicit "NULLS FIRST/LAST" */ 2872 union { 2873 struct { 2874 u16 iOrderByCol; /* For ORDER BY, column number in result set */ 2875 u16 iAlias; /* Index into Parse.aAlias[] for zName */ 2876 } x; 2877 int iConstExprReg; /* Register in which Expr value is cached */ 2878 } u; 2879 } a[1]; /* One slot for each expression in the list */ 2880 }; 2881 2882 /* 2883 ** Allowed values for Expr.a.eEName 2884 */ 2885 #define ENAME_NAME 0 /* The AS clause of a result set */ 2886 #define ENAME_SPAN 1 /* Complete text of the result set expression */ 2887 #define ENAME_TAB 2 /* "DB.TABLE.NAME" for the result set */ 2888 2889 /* 2890 ** An instance of this structure can hold a simple list of identifiers, 2891 ** such as the list "a,b,c" in the following statements: 2892 ** 2893 ** INSERT INTO t(a,b,c) VALUES ...; 2894 ** CREATE INDEX idx ON t(a,b,c); 2895 ** CREATE TRIGGER trig BEFORE UPDATE ON t(a,b,c) ...; 2896 ** 2897 ** The IdList.a.idx field is used when the IdList represents the list of 2898 ** column names after a table name in an INSERT statement. In the statement 2899 ** 2900 ** INSERT INTO t(a,b,c) ... 2901 ** 2902 ** If "a" is the k-th column of table "t", then IdList.a[0].idx==k. 2903 */ 2904 struct IdList { 2905 struct IdList_item { 2906 char *zName; /* Name of the identifier */ 2907 int idx; /* Index in some Table.aCol[] of a column named zName */ 2908 } *a; 2909 int nId; /* Number of identifiers on the list */ 2910 }; 2911 2912 /* 2913 ** The following structure describes the FROM clause of a SELECT statement. 2914 ** Each table or subquery in the FROM clause is a separate element of 2915 ** the SrcList.a[] array. 2916 ** 2917 ** With the addition of multiple database support, the following structure 2918 ** can also be used to describe a particular table such as the table that 2919 ** is modified by an INSERT, DELETE, or UPDATE statement. In standard SQL, 2920 ** such a table must be a simple name: ID. But in SQLite, the table can 2921 ** now be identified by a database name, a dot, then the table name: ID.ID. 2922 ** 2923 ** The jointype starts out showing the join type between the current table 2924 ** and the next table on the list. The parser builds the list this way. 2925 ** But sqlite3SrcListShiftJoinType() later shifts the jointypes so that each 2926 ** jointype expresses the join between the table and the previous table. 2927 ** 2928 ** In the colUsed field, the high-order bit (bit 63) is set if the table 2929 ** contains more than 63 columns and the 64-th or later column is used. 2930 */ 2931 struct SrcList { 2932 int nSrc; /* Number of tables or subqueries in the FROM clause */ 2933 u32 nAlloc; /* Number of entries allocated in a[] below */ 2934 struct SrcList_item { 2935 Schema *pSchema; /* Schema to which this item is fixed */ 2936 char *zDatabase; /* Name of database holding this table */ 2937 char *zName; /* Name of the table */ 2938 char *zAlias; /* The "B" part of a "A AS B" phrase. zName is the "A" */ 2939 Table *pTab; /* An SQL table corresponding to zName */ 2940 Select *pSelect; /* A SELECT statement used in place of a table name */ 2941 int addrFillSub; /* Address of subroutine to manifest a subquery */ 2942 int regReturn; /* Register holding return address of addrFillSub */ 2943 int regResult; /* Registers holding results of a co-routine */ 2944 struct { 2945 u8 jointype; /* Type of join between this table and the previous */ 2946 unsigned notIndexed :1; /* True if there is a NOT INDEXED clause */ 2947 unsigned isIndexedBy :1; /* True if there is an INDEXED BY clause */ 2948 unsigned isTabFunc :1; /* True if table-valued-function syntax */ 2949 unsigned isCorrelated :1; /* True if sub-query is correlated */ 2950 unsigned viaCoroutine :1; /* Implemented as a co-routine */ 2951 unsigned isRecursive :1; /* True for recursive reference in WITH */ 2952 unsigned fromDDL :1; /* Comes from sqlite_schema */ 2953 } fg; 2954 int iCursor; /* The VDBE cursor number used to access this table */ 2955 Expr *pOn; /* The ON clause of a join */ 2956 IdList *pUsing; /* The USING clause of a join */ 2957 Bitmask colUsed; /* Bit N (1<<N) set if column N of pTab is used */ 2958 union { 2959 char *zIndexedBy; /* Identifier from "INDEXED BY <zIndex>" clause */ 2960 ExprList *pFuncArg; /* Arguments to table-valued-function */ 2961 } u1; 2962 Index *pIBIndex; /* Index structure corresponding to u1.zIndexedBy */ 2963 } a[1]; /* One entry for each identifier on the list */ 2964 }; 2965 2966 /* 2967 ** Permitted values of the SrcList.a.jointype field 2968 */ 2969 #define JT_INNER 0x0001 /* Any kind of inner or cross join */ 2970 #define JT_CROSS 0x0002 /* Explicit use of the CROSS keyword */ 2971 #define JT_NATURAL 0x0004 /* True for a "natural" join */ 2972 #define JT_LEFT 0x0008 /* Left outer join */ 2973 #define JT_RIGHT 0x0010 /* Right outer join */ 2974 #define JT_OUTER 0x0020 /* The "OUTER" keyword is present */ 2975 #define JT_ERROR 0x0040 /* unknown or unsupported join type */ 2976 2977 2978 /* 2979 ** Flags appropriate for the wctrlFlags parameter of sqlite3WhereBegin() 2980 ** and the WhereInfo.wctrlFlags member. 2981 ** 2982 ** Value constraints (enforced via assert()): 2983 ** WHERE_USE_LIMIT == SF_FixedLimit 2984 */ 2985 #define WHERE_ORDERBY_NORMAL 0x0000 /* No-op */ 2986 #define WHERE_ORDERBY_MIN 0x0001 /* ORDER BY processing for min() func */ 2987 #define WHERE_ORDERBY_MAX 0x0002 /* ORDER BY processing for max() func */ 2988 #define WHERE_ONEPASS_DESIRED 0x0004 /* Want to do one-pass UPDATE/DELETE */ 2989 #define WHERE_ONEPASS_MULTIROW 0x0008 /* ONEPASS is ok with multiple rows */ 2990 #define WHERE_DUPLICATES_OK 0x0010 /* Ok to return a row more than once */ 2991 #define WHERE_OR_SUBCLAUSE 0x0020 /* Processing a sub-WHERE as part of 2992 ** the OR optimization */ 2993 #define WHERE_GROUPBY 0x0040 /* pOrderBy is really a GROUP BY */ 2994 #define WHERE_DISTINCTBY 0x0080 /* pOrderby is really a DISTINCT clause */ 2995 #define WHERE_WANT_DISTINCT 0x0100 /* All output needs to be distinct */ 2996 #define WHERE_SORTBYGROUP 0x0200 /* Support sqlite3WhereIsSorted() */ 2997 /* 0x0400 not currently used */ 2998 #define WHERE_ORDERBY_LIMIT 0x0800 /* ORDERBY+LIMIT on the inner loop */ 2999 /* 0x1000 not currently used */ 3000 /* 0x2000 not currently used */ 3001 #define WHERE_USE_LIMIT 0x4000 /* Use the LIMIT in cost estimates */ 3002 /* 0x8000 not currently used */ 3003 3004 /* Allowed return values from sqlite3WhereIsDistinct() 3005 */ 3006 #define WHERE_DISTINCT_NOOP 0 /* DISTINCT keyword not used */ 3007 #define WHERE_DISTINCT_UNIQUE 1 /* No duplicates */ 3008 #define WHERE_DISTINCT_ORDERED 2 /* All duplicates are adjacent */ 3009 #define WHERE_DISTINCT_UNORDERED 3 /* Duplicates are scattered */ 3010 3011 /* 3012 ** A NameContext defines a context in which to resolve table and column 3013 ** names. The context consists of a list of tables (the pSrcList) field and 3014 ** a list of named expression (pEList). The named expression list may 3015 ** be NULL. The pSrc corresponds to the FROM clause of a SELECT or 3016 ** to the table being operated on by INSERT, UPDATE, or DELETE. The 3017 ** pEList corresponds to the result set of a SELECT and is NULL for 3018 ** other statements. 3019 ** 3020 ** NameContexts can be nested. When resolving names, the inner-most 3021 ** context is searched first. If no match is found, the next outer 3022 ** context is checked. If there is still no match, the next context 3023 ** is checked. This process continues until either a match is found 3024 ** or all contexts are check. When a match is found, the nRef member of 3025 ** the context containing the match is incremented. 3026 ** 3027 ** Each subquery gets a new NameContext. The pNext field points to the 3028 ** NameContext in the parent query. Thus the process of scanning the 3029 ** NameContext list corresponds to searching through successively outer 3030 ** subqueries looking for a match. 3031 */ 3032 struct NameContext { 3033 Parse *pParse; /* The parser */ 3034 SrcList *pSrcList; /* One or more tables used to resolve names */ 3035 union { 3036 ExprList *pEList; /* Optional list of result-set columns */ 3037 AggInfo *pAggInfo; /* Information about aggregates at this level */ 3038 Upsert *pUpsert; /* ON CONFLICT clause information from an upsert */ 3039 } uNC; 3040 NameContext *pNext; /* Next outer name context. NULL for outermost */ 3041 int nRef; /* Number of names resolved by this context */ 3042 int nErr; /* Number of errors encountered while resolving names */ 3043 int ncFlags; /* Zero or more NC_* flags defined below */ 3044 Select *pWinSelect; /* SELECT statement for any window functions */ 3045 }; 3046 3047 /* 3048 ** Allowed values for the NameContext, ncFlags field. 3049 ** 3050 ** Value constraints (all checked via assert()): 3051 ** NC_HasAgg == SF_HasAgg == EP_Agg 3052 ** NC_MinMaxAgg == SF_MinMaxAgg == SQLITE_FUNC_MINMAX 3053 ** NC_HasWin == EP_Win 3054 ** 3055 */ 3056 #define NC_AllowAgg 0x00001 /* Aggregate functions are allowed here */ 3057 #define NC_PartIdx 0x00002 /* True if resolving a partial index WHERE */ 3058 #define NC_IsCheck 0x00004 /* True if resolving a CHECK constraint */ 3059 #define NC_GenCol 0x00008 /* True for a GENERATED ALWAYS AS clause */ 3060 #define NC_HasAgg 0x00010 /* One or more aggregate functions seen */ 3061 #define NC_IdxExpr 0x00020 /* True if resolving columns of CREATE INDEX */ 3062 #define NC_SelfRef 0x0002e /* Combo: PartIdx, isCheck, GenCol, and IdxExpr */ 3063 #define NC_VarSelect 0x00040 /* A correlated subquery has been seen */ 3064 #define NC_UEList 0x00080 /* True if uNC.pEList is used */ 3065 #define NC_UAggInfo 0x00100 /* True if uNC.pAggInfo is used */ 3066 #define NC_UUpsert 0x00200 /* True if uNC.pUpsert is used */ 3067 #define NC_MinMaxAgg 0x01000 /* min/max aggregates seen. See note above */ 3068 #define NC_Complex 0x02000 /* True if a function or subquery seen */ 3069 #define NC_AllowWin 0x04000 /* Window functions are allowed here */ 3070 #define NC_HasWin 0x08000 /* One or more window functions seen */ 3071 #define NC_IsDDL 0x10000 /* Resolving names in a CREATE statement */ 3072 #define NC_InAggFunc 0x20000 /* True if analyzing arguments to an agg func */ 3073 #define NC_FromDDL 0x40000 /* SQL text comes from sqlite_schema */ 3074 3075 /* 3076 ** An instance of the following object describes a single ON CONFLICT 3077 ** clause in an upsert. 3078 ** 3079 ** The pUpsertTarget field is only set if the ON CONFLICT clause includes 3080 ** conflict-target clause. (In "ON CONFLICT(a,b)" the "(a,b)" is the 3081 ** conflict-target clause.) The pUpsertTargetWhere is the optional 3082 ** WHERE clause used to identify partial unique indexes. 3083 ** 3084 ** pUpsertSet is the list of column=expr terms of the UPDATE statement. 3085 ** The pUpsertSet field is NULL for a ON CONFLICT DO NOTHING. The 3086 ** pUpsertWhere is the WHERE clause for the UPDATE and is NULL if the 3087 ** WHERE clause is omitted. 3088 */ 3089 struct Upsert { 3090 ExprList *pUpsertTarget; /* Optional description of conflict target */ 3091 Expr *pUpsertTargetWhere; /* WHERE clause for partial index targets */ 3092 ExprList *pUpsertSet; /* The SET clause from an ON CONFLICT UPDATE */ 3093 Expr *pUpsertWhere; /* WHERE clause for the ON CONFLICT UPDATE */ 3094 Upsert *pNextUpsert; /* Next ON CONFLICT clause in the list */ 3095 u8 isDoUpdate; /* True for DO UPDATE. False for DO NOTHING */ 3096 /* Above this point is the parse tree for the ON CONFLICT clauses. 3097 ** The next group of fields stores intermediate data. */ 3098 void *pToFree; /* Free memory when deleting the Upsert object */ 3099 /* All fields above are owned by the Upsert object and must be freed 3100 ** when the Upsert is destroyed. The fields below are used to transfer 3101 ** information from the INSERT processing down into the UPDATE processing 3102 ** while generating code. The fields below are owned by the INSERT 3103 ** statement and will be freed by INSERT processing. */ 3104 Index *pUpsertIdx; /* UNIQUE constraint specified by pUpsertTarget */ 3105 SrcList *pUpsertSrc; /* Table to be updated */ 3106 int regData; /* First register holding array of VALUES */ 3107 int iDataCur; /* Index of the data cursor */ 3108 int iIdxCur; /* Index of the first index cursor */ 3109 }; 3110 3111 /* 3112 ** An instance of the following structure contains all information 3113 ** needed to generate code for a single SELECT statement. 3114 ** 3115 ** See the header comment on the computeLimitRegisters() routine for a 3116 ** detailed description of the meaning of the iLimit and iOffset fields. 3117 ** 3118 ** addrOpenEphm[] entries contain the address of OP_OpenEphemeral opcodes. 3119 ** These addresses must be stored so that we can go back and fill in 3120 ** the P4_KEYINFO and P2 parameters later. Neither the KeyInfo nor 3121 ** the number of columns in P2 can be computed at the same time 3122 ** as the OP_OpenEphm instruction is coded because not 3123 ** enough information about the compound query is known at that point. 3124 ** The KeyInfo for addrOpenTran[0] and [1] contains collating sequences 3125 ** for the result set. The KeyInfo for addrOpenEphm[2] contains collating 3126 ** sequences for the ORDER BY clause. 3127 */ 3128 struct Select { 3129 u8 op; /* One of: TK_UNION TK_ALL TK_INTERSECT TK_EXCEPT */ 3130 LogEst nSelectRow; /* Estimated number of result rows */ 3131 u32 selFlags; /* Various SF_* values */ 3132 int iLimit, iOffset; /* Memory registers holding LIMIT & OFFSET counters */ 3133 u32 selId; /* Unique identifier number for this SELECT */ 3134 int addrOpenEphm[2]; /* OP_OpenEphem opcodes related to this select */ 3135 ExprList *pEList; /* The fields of the result */ 3136 SrcList *pSrc; /* The FROM clause */ 3137 Expr *pWhere; /* The WHERE clause */ 3138 ExprList *pGroupBy; /* The GROUP BY clause */ 3139 Expr *pHaving; /* The HAVING clause */ 3140 ExprList *pOrderBy; /* The ORDER BY clause */ 3141 Select *pPrior; /* Prior select in a compound select statement */ 3142 Select *pNext; /* Next select to the left in a compound */ 3143 Expr *pLimit; /* LIMIT expression. NULL means not used. */ 3144 With *pWith; /* WITH clause attached to this select. Or NULL. */ 3145 #ifndef SQLITE_OMIT_WINDOWFUNC 3146 Window *pWin; /* List of window functions */ 3147 Window *pWinDefn; /* List of named window definitions */ 3148 #endif 3149 }; 3150 3151 /* 3152 ** Allowed values for Select.selFlags. The "SF" prefix stands for 3153 ** "Select Flag". 3154 ** 3155 ** Value constraints (all checked via assert()) 3156 ** SF_HasAgg == NC_HasAgg 3157 ** SF_MinMaxAgg == NC_MinMaxAgg == SQLITE_FUNC_MINMAX 3158 ** SF_FixedLimit == WHERE_USE_LIMIT 3159 */ 3160 #define SF_Distinct 0x0000001 /* Output should be DISTINCT */ 3161 #define SF_All 0x0000002 /* Includes the ALL keyword */ 3162 #define SF_Resolved 0x0000004 /* Identifiers have been resolved */ 3163 #define SF_Aggregate 0x0000008 /* Contains agg functions or a GROUP BY */ 3164 #define SF_HasAgg 0x0000010 /* Contains aggregate functions */ 3165 #define SF_UsesEphemeral 0x0000020 /* Uses the OpenEphemeral opcode */ 3166 #define SF_Expanded 0x0000040 /* sqlite3SelectExpand() called on this */ 3167 #define SF_HasTypeInfo 0x0000080 /* FROM subqueries have Table metadata */ 3168 #define SF_Compound 0x0000100 /* Part of a compound query */ 3169 #define SF_Values 0x0000200 /* Synthesized from VALUES clause */ 3170 #define SF_MultiValue 0x0000400 /* Single VALUES term with multiple rows */ 3171 #define SF_NestedFrom 0x0000800 /* Part of a parenthesized FROM clause */ 3172 #define SF_MinMaxAgg 0x0001000 /* Aggregate containing min() or max() */ 3173 #define SF_Recursive 0x0002000 /* The recursive part of a recursive CTE */ 3174 #define SF_FixedLimit 0x0004000 /* nSelectRow set by a constant LIMIT */ 3175 #define SF_MaybeConvert 0x0008000 /* Need convertCompoundSelectToSubquery() */ 3176 #define SF_Converted 0x0010000 /* By convertCompoundSelectToSubquery() */ 3177 #define SF_IncludeHidden 0x0020000 /* Include hidden columns in output */ 3178 #define SF_ComplexResult 0x0040000 /* Result contains subquery or function */ 3179 #define SF_WhereBegin 0x0080000 /* Really a WhereBegin() call. Debug Only */ 3180 #define SF_WinRewrite 0x0100000 /* Window function rewrite accomplished */ 3181 #define SF_View 0x0200000 /* SELECT statement is a view */ 3182 #define SF_NoopOrderBy 0x0400000 /* ORDER BY is ignored for this query */ 3183 #define SF_UpdateFrom 0x0800000 /* Statement is an UPDATE...FROM */ 3184 3185 /* 3186 ** The results of a SELECT can be distributed in several ways, as defined 3187 ** by one of the following macros. The "SRT" prefix means "SELECT Result 3188 ** Type". 3189 ** 3190 ** SRT_Union Store results as a key in a temporary index 3191 ** identified by pDest->iSDParm. 3192 ** 3193 ** SRT_Except Remove results from the temporary index pDest->iSDParm. 3194 ** 3195 ** SRT_Exists Store a 1 in memory cell pDest->iSDParm if the result 3196 ** set is not empty. 3197 ** 3198 ** SRT_Discard Throw the results away. This is used by SELECT 3199 ** statements within triggers whose only purpose is 3200 ** the side-effects of functions. 3201 ** 3202 ** SRT_Output Generate a row of output (using the OP_ResultRow 3203 ** opcode) for each row in the result set. 3204 ** 3205 ** SRT_Mem Only valid if the result is a single column. 3206 ** Store the first column of the first result row 3207 ** in register pDest->iSDParm then abandon the rest 3208 ** of the query. This destination implies "LIMIT 1". 3209 ** 3210 ** SRT_Set The result must be a single column. Store each 3211 ** row of result as the key in table pDest->iSDParm. 3212 ** Apply the affinity pDest->affSdst before storing 3213 ** results. Used to implement "IN (SELECT ...)". 3214 ** 3215 ** SRT_EphemTab Create an temporary table pDest->iSDParm and store 3216 ** the result there. The cursor is left open after 3217 ** returning. This is like SRT_Table except that 3218 ** this destination uses OP_OpenEphemeral to create 3219 ** the table first. 3220 ** 3221 ** SRT_Coroutine Generate a co-routine that returns a new row of 3222 ** results each time it is invoked. The entry point 3223 ** of the co-routine is stored in register pDest->iSDParm 3224 ** and the result row is stored in pDest->nDest registers 3225 ** starting with pDest->iSdst. 3226 ** 3227 ** SRT_Table Store results in temporary table pDest->iSDParm. 3228 ** SRT_Fifo This is like SRT_EphemTab except that the table 3229 ** is assumed to already be open. SRT_Fifo has 3230 ** the additional property of being able to ignore 3231 ** the ORDER BY clause. 3232 ** 3233 ** SRT_DistFifo Store results in a temporary table pDest->iSDParm. 3234 ** But also use temporary table pDest->iSDParm+1 as 3235 ** a record of all prior results and ignore any duplicate 3236 ** rows. Name means: "Distinct Fifo". 3237 ** 3238 ** SRT_Queue Store results in priority queue pDest->iSDParm (really 3239 ** an index). Append a sequence number so that all entries 3240 ** are distinct. 3241 ** 3242 ** SRT_DistQueue Store results in priority queue pDest->iSDParm only if 3243 ** the same record has never been stored before. The 3244 ** index at pDest->iSDParm+1 hold all prior stores. 3245 ** 3246 ** SRT_Upfrom Store results in the temporary table already opened by 3247 ** pDest->iSDParm. If (pDest->iSDParm<0), then the temp 3248 ** table is an intkey table - in this case the first 3249 ** column returned by the SELECT is used as the integer 3250 ** key. If (pDest->iSDParm>0), then the table is an index 3251 ** table. (pDest->iSDParm) is the number of key columns in 3252 ** each index record in this case. 3253 */ 3254 #define SRT_Union 1 /* Store result as keys in an index */ 3255 #define SRT_Except 2 /* Remove result from a UNION index */ 3256 #define SRT_Exists 3 /* Store 1 if the result is not empty */ 3257 #define SRT_Discard 4 /* Do not save the results anywhere */ 3258 #define SRT_DistFifo 5 /* Like SRT_Fifo, but unique results only */ 3259 #define SRT_DistQueue 6 /* Like SRT_Queue, but unique results only */ 3260 3261 /* The DISTINCT clause is ignored for all of the above. Not that 3262 ** IgnorableDistinct() implies IgnorableOrderby() */ 3263 #define IgnorableDistinct(X) ((X->eDest)<=SRT_DistQueue) 3264 3265 #define SRT_Queue 7 /* Store result in an queue */ 3266 #define SRT_Fifo 8 /* Store result as data with an automatic rowid */ 3267 3268 /* The ORDER BY clause is ignored for all of the above */ 3269 #define IgnorableOrderby(X) ((X->eDest)<=SRT_Fifo) 3270 3271 #define SRT_Output 9 /* Output each row of result */ 3272 #define SRT_Mem 10 /* Store result in a memory cell */ 3273 #define SRT_Set 11 /* Store results as keys in an index */ 3274 #define SRT_EphemTab 12 /* Create transient tab and store like SRT_Table */ 3275 #define SRT_Coroutine 13 /* Generate a single row of result */ 3276 #define SRT_Table 14 /* Store result as data with an automatic rowid */ 3277 #define SRT_Upfrom 15 /* Store result as data with rowid */ 3278 3279 /* 3280 ** An instance of this object describes where to put of the results of 3281 ** a SELECT statement. 3282 */ 3283 struct SelectDest { 3284 u8 eDest; /* How to dispose of the results. One of SRT_* above. */ 3285 int iSDParm; /* A parameter used by the eDest disposal method */ 3286 int iSDParm2; /* A second parameter for the eDest disposal method */ 3287 int iSdst; /* Base register where results are written */ 3288 int nSdst; /* Number of registers allocated */ 3289 char *zAffSdst; /* Affinity used when eDest==SRT_Set */ 3290 ExprList *pOrderBy; /* Key columns for SRT_Queue and SRT_DistQueue */ 3291 }; 3292 3293 /* 3294 ** During code generation of statements that do inserts into AUTOINCREMENT 3295 ** tables, the following information is attached to the Table.u.autoInc.p 3296 ** pointer of each autoincrement table to record some side information that 3297 ** the code generator needs. We have to keep per-table autoincrement 3298 ** information in case inserts are done within triggers. Triggers do not 3299 ** normally coordinate their activities, but we do need to coordinate the 3300 ** loading and saving of autoincrement information. 3301 */ 3302 struct AutoincInfo { 3303 AutoincInfo *pNext; /* Next info block in a list of them all */ 3304 Table *pTab; /* Table this info block refers to */ 3305 int iDb; /* Index in sqlite3.aDb[] of database holding pTab */ 3306 int regCtr; /* Memory register holding the rowid counter */ 3307 }; 3308 3309 /* 3310 ** At least one instance of the following structure is created for each 3311 ** trigger that may be fired while parsing an INSERT, UPDATE or DELETE 3312 ** statement. All such objects are stored in the linked list headed at 3313 ** Parse.pTriggerPrg and deleted once statement compilation has been 3314 ** completed. 3315 ** 3316 ** A Vdbe sub-program that implements the body and WHEN clause of trigger 3317 ** TriggerPrg.pTrigger, assuming a default ON CONFLICT clause of 3318 ** TriggerPrg.orconf, is stored in the TriggerPrg.pProgram variable. 3319 ** The Parse.pTriggerPrg list never contains two entries with the same 3320 ** values for both pTrigger and orconf. 3321 ** 3322 ** The TriggerPrg.aColmask[0] variable is set to a mask of old.* columns 3323 ** accessed (or set to 0 for triggers fired as a result of INSERT 3324 ** statements). Similarly, the TriggerPrg.aColmask[1] variable is set to 3325 ** a mask of new.* columns used by the program. 3326 */ 3327 struct TriggerPrg { 3328 Trigger *pTrigger; /* Trigger this program was coded from */ 3329 TriggerPrg *pNext; /* Next entry in Parse.pTriggerPrg list */ 3330 SubProgram *pProgram; /* Program implementing pTrigger/orconf */ 3331 int orconf; /* Default ON CONFLICT policy */ 3332 u32 aColmask[2]; /* Masks of old.*, new.* columns accessed */ 3333 }; 3334 3335 /* 3336 ** The yDbMask datatype for the bitmask of all attached databases. 3337 */ 3338 #if SQLITE_MAX_ATTACHED>30 3339 typedef unsigned char yDbMask[(SQLITE_MAX_ATTACHED+9)/8]; 3340 # define DbMaskTest(M,I) (((M)[(I)/8]&(1<<((I)&7)))!=0) 3341 # define DbMaskZero(M) memset((M),0,sizeof(M)) 3342 # define DbMaskSet(M,I) (M)[(I)/8]|=(1<<((I)&7)) 3343 # define DbMaskAllZero(M) sqlite3DbMaskAllZero(M) 3344 # define DbMaskNonZero(M) (sqlite3DbMaskAllZero(M)==0) 3345 #else 3346 typedef unsigned int yDbMask; 3347 # define DbMaskTest(M,I) (((M)&(((yDbMask)1)<<(I)))!=0) 3348 # define DbMaskZero(M) (M)=0 3349 # define DbMaskSet(M,I) (M)|=(((yDbMask)1)<<(I)) 3350 # define DbMaskAllZero(M) (M)==0 3351 # define DbMaskNonZero(M) (M)!=0 3352 #endif 3353 3354 /* 3355 ** An instance of the ParseCleanup object specifies an operation that 3356 ** should be performed after parsing to deallocation resources obtained 3357 ** during the parse and which are no longer needed. 3358 */ 3359 struct ParseCleanup { 3360 ParseCleanup *pNext; /* Next cleanup task */ 3361 void *pPtr; /* Pointer to object to deallocate */ 3362 void (*xCleanup)(sqlite3*,void*); /* Deallocation routine */ 3363 }; 3364 3365 /* 3366 ** An SQL parser context. A copy of this structure is passed through 3367 ** the parser and down into all the parser action routine in order to 3368 ** carry around information that is global to the entire parse. 3369 ** 3370 ** The structure is divided into two parts. When the parser and code 3371 ** generate call themselves recursively, the first part of the structure 3372 ** is constant but the second part is reset at the beginning and end of 3373 ** each recursion. 3374 ** 3375 ** The nTableLock and aTableLock variables are only used if the shared-cache 3376 ** feature is enabled (if sqlite3Tsd()->useSharedData is true). They are 3377 ** used to store the set of table-locks required by the statement being 3378 ** compiled. Function sqlite3TableLock() is used to add entries to the 3379 ** list. 3380 */ 3381 struct Parse { 3382 sqlite3 *db; /* The main database structure */ 3383 char *zErrMsg; /* An error message */ 3384 Vdbe *pVdbe; /* An engine for executing database bytecode */ 3385 int rc; /* Return code from execution */ 3386 u8 colNamesSet; /* TRUE after OP_ColumnName has been issued to pVdbe */ 3387 u8 checkSchema; /* Causes schema cookie check after an error */ 3388 u8 nested; /* Number of nested calls to the parser/code generator */ 3389 u8 nTempReg; /* Number of temporary registers in aTempReg[] */ 3390 u8 isMultiWrite; /* True if statement may modify/insert multiple rows */ 3391 u8 mayAbort; /* True if statement may throw an ABORT exception */ 3392 u8 hasCompound; /* Need to invoke convertCompoundSelectToSubquery() */ 3393 u8 okConstFactor; /* OK to factor out constants */ 3394 u8 disableLookaside; /* Number of times lookaside has been disabled */ 3395 u8 disableVtab; /* Disable all virtual tables for this parse */ 3396 #if defined(SQLITE_DEBUG) || defined(SQLITE_COVERAGE_TEST) 3397 u8 earlyCleanup; /* OOM inside sqlite3ParserAddCleanup() */ 3398 #endif 3399 int nRangeReg; /* Size of the temporary register block */ 3400 int iRangeReg; /* First register in temporary register block */ 3401 int nErr; /* Number of errors seen */ 3402 int nTab; /* Number of previously allocated VDBE cursors */ 3403 int nMem; /* Number of memory cells used so far */ 3404 int szOpAlloc; /* Bytes of memory space allocated for Vdbe.aOp[] */ 3405 int iSelfTab; /* Table associated with an index on expr, or negative 3406 ** of the base register during check-constraint eval */ 3407 int nLabel; /* The *negative* of the number of labels used */ 3408 int nLabelAlloc; /* Number of slots in aLabel */ 3409 int *aLabel; /* Space to hold the labels */ 3410 ExprList *pConstExpr;/* Constant expressions */ 3411 Token constraintName;/* Name of the constraint currently being parsed */ 3412 yDbMask writeMask; /* Start a write transaction on these databases */ 3413 yDbMask cookieMask; /* Bitmask of schema verified databases */ 3414 int regRowid; /* Register holding rowid of CREATE TABLE entry */ 3415 int regRoot; /* Register holding root page number for new objects */ 3416 int nMaxArg; /* Max args passed to user function by sub-program */ 3417 int nSelect; /* Number of SELECT stmts. Counter for Select.selId */ 3418 #ifndef SQLITE_OMIT_SHARED_CACHE 3419 int nTableLock; /* Number of locks in aTableLock */ 3420 TableLock *aTableLock; /* Required table locks for shared-cache mode */ 3421 #endif 3422 AutoincInfo *pAinc; /* Information about AUTOINCREMENT counters */ 3423 Parse *pToplevel; /* Parse structure for main program (or NULL) */ 3424 Table *pTriggerTab; /* Table triggers are being coded for */ 3425 Parse *pParentParse; /* Parent parser if this parser is nested */ 3426 AggInfo *pAggList; /* List of all AggInfo objects */ 3427 int addrCrTab; /* Address of OP_CreateBtree opcode on CREATE TABLE */ 3428 u32 nQueryLoop; /* Est number of iterations of a query (10*log2(N)) */ 3429 u32 oldmask; /* Mask of old.* columns referenced */ 3430 u32 newmask; /* Mask of new.* columns referenced */ 3431 u8 eTriggerOp; /* TK_UPDATE, TK_INSERT or TK_DELETE */ 3432 u8 eOrconf; /* Default ON CONFLICT policy for trigger steps */ 3433 u8 disableTriggers; /* True to disable triggers */ 3434 3435 /************************************************************************** 3436 ** Fields above must be initialized to zero. The fields that follow, 3437 ** down to the beginning of the recursive section, do not need to be 3438 ** initialized as they will be set before being used. The boundary is 3439 ** determined by offsetof(Parse,aTempReg). 3440 **************************************************************************/ 3441 3442 int aTempReg[8]; /* Holding area for temporary registers */ 3443 Token sNameToken; /* Token with unqualified schema object name */ 3444 3445 /************************************************************************ 3446 ** Above is constant between recursions. Below is reset before and after 3447 ** each recursion. The boundary between these two regions is determined 3448 ** using offsetof(Parse,sLastToken) so the sLastToken field must be the 3449 ** first field in the recursive region. 3450 ************************************************************************/ 3451 3452 Token sLastToken; /* The last token parsed */ 3453 ynVar nVar; /* Number of '?' variables seen in the SQL so far */ 3454 u8 iPkSortOrder; /* ASC or DESC for INTEGER PRIMARY KEY */ 3455 u8 explain; /* True if the EXPLAIN flag is found on the query */ 3456 u8 eParseMode; /* PARSE_MODE_XXX constant */ 3457 #ifndef SQLITE_OMIT_VIRTUALTABLE 3458 int nVtabLock; /* Number of virtual tables to lock */ 3459 #endif 3460 int nHeight; /* Expression tree height of current sub-select */ 3461 #ifndef SQLITE_OMIT_EXPLAIN 3462 int addrExplain; /* Address of current OP_Explain opcode */ 3463 #endif 3464 VList *pVList; /* Mapping between variable names and numbers */ 3465 Vdbe *pReprepare; /* VM being reprepared (sqlite3Reprepare()) */ 3466 const char *zTail; /* All SQL text past the last semicolon parsed */ 3467 Table *pNewTable; /* A table being constructed by CREATE TABLE */ 3468 Index *pNewIndex; /* An index being constructed by CREATE INDEX. 3469 ** Also used to hold redundant UNIQUE constraints 3470 ** during a RENAME COLUMN */ 3471 Trigger *pNewTrigger; /* Trigger under construct by a CREATE TRIGGER */ 3472 const char *zAuthContext; /* The 6th parameter to db->xAuth callbacks */ 3473 #ifndef SQLITE_OMIT_VIRTUALTABLE 3474 Token sArg; /* Complete text of a module argument */ 3475 Table **apVtabLock; /* Pointer to virtual tables needing locking */ 3476 #endif 3477 TriggerPrg *pTriggerPrg; /* Linked list of coded triggers */ 3478 With *pWith; /* Current WITH clause, or NULL */ 3479 ParseCleanup *pCleanup; /* List of cleanup operations to run after parse */ 3480 #ifndef SQLITE_OMIT_ALTERTABLE 3481 RenameToken *pRename; /* Tokens subject to renaming by ALTER TABLE */ 3482 #endif 3483 }; 3484 3485 #define PARSE_MODE_NORMAL 0 3486 #define PARSE_MODE_DECLARE_VTAB 1 3487 #define PARSE_MODE_RENAME 2 3488 #define PARSE_MODE_UNMAP 3 3489 3490 /* 3491 ** Sizes and pointers of various parts of the Parse object. 3492 */ 3493 #define PARSE_HDR_SZ offsetof(Parse,aTempReg) /* Recursive part w/o aColCache*/ 3494 #define PARSE_RECURSE_SZ offsetof(Parse,sLastToken) /* Recursive part */ 3495 #define PARSE_TAIL_SZ (sizeof(Parse)-PARSE_RECURSE_SZ) /* Non-recursive part */ 3496 #define PARSE_TAIL(X) (((char*)(X))+PARSE_RECURSE_SZ) /* Pointer to tail */ 3497 3498 /* 3499 ** Return true if currently inside an sqlite3_declare_vtab() call. 3500 */ 3501 #ifdef SQLITE_OMIT_VIRTUALTABLE 3502 #define IN_DECLARE_VTAB 0 3503 #else 3504 #define IN_DECLARE_VTAB (pParse->eParseMode==PARSE_MODE_DECLARE_VTAB) 3505 #endif 3506 3507 #if defined(SQLITE_OMIT_ALTERTABLE) 3508 #define IN_RENAME_OBJECT 0 3509 #else 3510 #define IN_RENAME_OBJECT (pParse->eParseMode>=PARSE_MODE_RENAME) 3511 #endif 3512 3513 #if defined(SQLITE_OMIT_VIRTUALTABLE) && defined(SQLITE_OMIT_ALTERTABLE) 3514 #define IN_SPECIAL_PARSE 0 3515 #else 3516 #define IN_SPECIAL_PARSE (pParse->eParseMode!=PARSE_MODE_NORMAL) 3517 #endif 3518 3519 /* 3520 ** An instance of the following structure can be declared on a stack and used 3521 ** to save the Parse.zAuthContext value so that it can be restored later. 3522 */ 3523 struct AuthContext { 3524 const char *zAuthContext; /* Put saved Parse.zAuthContext here */ 3525 Parse *pParse; /* The Parse structure */ 3526 }; 3527 3528 /* 3529 ** Bitfield flags for P5 value in various opcodes. 3530 ** 3531 ** Value constraints (enforced via assert()): 3532 ** OPFLAG_LENGTHARG == SQLITE_FUNC_LENGTH 3533 ** OPFLAG_TYPEOFARG == SQLITE_FUNC_TYPEOF 3534 ** OPFLAG_BULKCSR == BTREE_BULKLOAD 3535 ** OPFLAG_SEEKEQ == BTREE_SEEK_EQ 3536 ** OPFLAG_FORDELETE == BTREE_FORDELETE 3537 ** OPFLAG_SAVEPOSITION == BTREE_SAVEPOSITION 3538 ** OPFLAG_AUXDELETE == BTREE_AUXDELETE 3539 */ 3540 #define OPFLAG_NCHANGE 0x01 /* OP_Insert: Set to update db->nChange */ 3541 /* Also used in P2 (not P5) of OP_Delete */ 3542 #define OPFLAG_NOCHNG 0x01 /* OP_VColumn nochange for UPDATE */ 3543 #define OPFLAG_EPHEM 0x01 /* OP_Column: Ephemeral output is ok */ 3544 #define OPFLAG_LASTROWID 0x20 /* Set to update db->lastRowid */ 3545 #define OPFLAG_ISUPDATE 0x04 /* This OP_Insert is an sql UPDATE */ 3546 #define OPFLAG_APPEND 0x08 /* This is likely to be an append */ 3547 #define OPFLAG_USESEEKRESULT 0x10 /* Try to avoid a seek in BtreeInsert() */ 3548 #define OPFLAG_ISNOOP 0x40 /* OP_Delete does pre-update-hook only */ 3549 #define OPFLAG_LENGTHARG 0x40 /* OP_Column only used for length() */ 3550 #define OPFLAG_TYPEOFARG 0x80 /* OP_Column only used for typeof() */ 3551 #define OPFLAG_BULKCSR 0x01 /* OP_Open** used to open bulk cursor */ 3552 #define OPFLAG_SEEKEQ 0x02 /* OP_Open** cursor uses EQ seek only */ 3553 #define OPFLAG_FORDELETE 0x08 /* OP_Open should use BTREE_FORDELETE */ 3554 #define OPFLAG_P2ISREG 0x10 /* P2 to OP_Open** is a register number */ 3555 #define OPFLAG_PERMUTE 0x01 /* OP_Compare: use the permutation */ 3556 #define OPFLAG_SAVEPOSITION 0x02 /* OP_Delete/Insert: save cursor pos */ 3557 #define OPFLAG_AUXDELETE 0x04 /* OP_Delete: index in a DELETE op */ 3558 #define OPFLAG_NOCHNG_MAGIC 0x6d /* OP_MakeRecord: serialtype 10 is ok */ 3559 #define OPFLAG_PREFORMAT 0x80 /* OP_Insert uses preformatted cell */ 3560 3561 /* 3562 * Each trigger present in the database schema is stored as an instance of 3563 * struct Trigger. 3564 * 3565 * Pointers to instances of struct Trigger are stored in two ways. 3566 * 1. In the "trigHash" hash table (part of the sqlite3* that represents the 3567 * database). This allows Trigger structures to be retrieved by name. 3568 * 2. All triggers associated with a single table form a linked list, using the 3569 * pNext member of struct Trigger. A pointer to the first element of the 3570 * linked list is stored as the "pTrigger" member of the associated 3571 * struct Table. 3572 * 3573 * The "step_list" member points to the first element of a linked list 3574 * containing the SQL statements specified as the trigger program. 3575 */ 3576 struct Trigger { 3577 char *zName; /* The name of the trigger */ 3578 char *table; /* The table or view to which the trigger applies */ 3579 u8 op; /* One of TK_DELETE, TK_UPDATE, TK_INSERT */ 3580 u8 tr_tm; /* One of TRIGGER_BEFORE, TRIGGER_AFTER */ 3581 Expr *pWhen; /* The WHEN clause of the expression (may be NULL) */ 3582 IdList *pColumns; /* If this is an UPDATE OF <column-list> trigger, 3583 the <column-list> is stored here */ 3584 Schema *pSchema; /* Schema containing the trigger */ 3585 Schema *pTabSchema; /* Schema containing the table */ 3586 TriggerStep *step_list; /* Link list of trigger program steps */ 3587 Trigger *pNext; /* Next trigger associated with the table */ 3588 }; 3589 3590 /* 3591 ** A trigger is either a BEFORE or an AFTER trigger. The following constants 3592 ** determine which. 3593 ** 3594 ** If there are multiple triggers, you might of some BEFORE and some AFTER. 3595 ** In that cases, the constants below can be ORed together. 3596 */ 3597 #define TRIGGER_BEFORE 1 3598 #define TRIGGER_AFTER 2 3599 3600 /* 3601 * An instance of struct TriggerStep is used to store a single SQL statement 3602 * that is a part of a trigger-program. 3603 * 3604 * Instances of struct TriggerStep are stored in a singly linked list (linked 3605 * using the "pNext" member) referenced by the "step_list" member of the 3606 * associated struct Trigger instance. The first element of the linked list is 3607 * the first step of the trigger-program. 3608 * 3609 * The "op" member indicates whether this is a "DELETE", "INSERT", "UPDATE" or 3610 * "SELECT" statement. The meanings of the other members is determined by the 3611 * value of "op" as follows: 3612 * 3613 * (op == TK_INSERT) 3614 * orconf -> stores the ON CONFLICT algorithm 3615 * pSelect -> If this is an INSERT INTO ... SELECT ... statement, then 3616 * this stores a pointer to the SELECT statement. Otherwise NULL. 3617 * zTarget -> Dequoted name of the table to insert into. 3618 * pExprList -> If this is an INSERT INTO ... VALUES ... statement, then 3619 * this stores values to be inserted. Otherwise NULL. 3620 * pIdList -> If this is an INSERT INTO ... (<column-names>) VALUES ... 3621 * statement, then this stores the column-names to be 3622 * inserted into. 3623 * 3624 * (op == TK_DELETE) 3625 * zTarget -> Dequoted name of the table to delete from. 3626 * pWhere -> The WHERE clause of the DELETE statement if one is specified. 3627 * Otherwise NULL. 3628 * 3629 * (op == TK_UPDATE) 3630 * zTarget -> Dequoted name of the table to update. 3631 * pWhere -> The WHERE clause of the UPDATE statement if one is specified. 3632 * Otherwise NULL. 3633 * pExprList -> A list of the columns to update and the expressions to update 3634 * them to. See sqlite3Update() documentation of "pChanges" 3635 * argument. 3636 * 3637 */ 3638 struct TriggerStep { 3639 u8 op; /* One of TK_DELETE, TK_UPDATE, TK_INSERT, TK_SELECT */ 3640 u8 orconf; /* OE_Rollback etc. */ 3641 Trigger *pTrig; /* The trigger that this step is a part of */ 3642 Select *pSelect; /* SELECT statement or RHS of INSERT INTO SELECT ... */ 3643 char *zTarget; /* Target table for DELETE, UPDATE, INSERT */ 3644 SrcList *pFrom; /* FROM clause for UPDATE statement (if any) */ 3645 Expr *pWhere; /* The WHERE clause for DELETE or UPDATE steps */ 3646 ExprList *pExprList; /* SET clause for UPDATE */ 3647 IdList *pIdList; /* Column names for INSERT */ 3648 Upsert *pUpsert; /* Upsert clauses on an INSERT */ 3649 char *zSpan; /* Original SQL text of this command */ 3650 TriggerStep *pNext; /* Next in the link-list */ 3651 TriggerStep *pLast; /* Last element in link-list. Valid for 1st elem only */ 3652 }; 3653 3654 /* 3655 ** An objected used to accumulate the text of a string where we 3656 ** do not necessarily know how big the string will be in the end. 3657 */ 3658 struct sqlite3_str { 3659 sqlite3 *db; /* Optional database for lookaside. Can be NULL */ 3660 char *zText; /* The string collected so far */ 3661 u32 nAlloc; /* Amount of space allocated in zText */ 3662 u32 mxAlloc; /* Maximum allowed allocation. 0 for no malloc usage */ 3663 u32 nChar; /* Length of the string so far */ 3664 u8 accError; /* SQLITE_NOMEM or SQLITE_TOOBIG */ 3665 u8 printfFlags; /* SQLITE_PRINTF flags below */ 3666 }; 3667 #define SQLITE_PRINTF_INTERNAL 0x01 /* Internal-use-only converters allowed */ 3668 #define SQLITE_PRINTF_SQLFUNC 0x02 /* SQL function arguments to VXPrintf */ 3669 #define SQLITE_PRINTF_MALLOCED 0x04 /* True if xText is allocated space */ 3670 3671 #define isMalloced(X) (((X)->printfFlags & SQLITE_PRINTF_MALLOCED)!=0) 3672 3673 3674 /* 3675 ** A pointer to this structure is used to communicate information 3676 ** from sqlite3Init and OP_ParseSchema into the sqlite3InitCallback. 3677 */ 3678 typedef struct { 3679 sqlite3 *db; /* The database being initialized */ 3680 char **pzErrMsg; /* Error message stored here */ 3681 int iDb; /* 0 for main database. 1 for TEMP, 2.. for ATTACHed */ 3682 int rc; /* Result code stored here */ 3683 u32 mInitFlags; /* Flags controlling error messages */ 3684 u32 nInitRow; /* Number of rows processed */ 3685 Pgno mxPage; /* Maximum page number. 0 for no limit. */ 3686 } InitData; 3687 3688 /* 3689 ** Allowed values for mInitFlags 3690 */ 3691 #define INITFLAG_AlterTable 0x0001 /* This is a reparse after ALTER TABLE */ 3692 3693 /* 3694 ** Structure containing global configuration data for the SQLite library. 3695 ** 3696 ** This structure also contains some state information. 3697 */ 3698 struct Sqlite3Config { 3699 int bMemstat; /* True to enable memory status */ 3700 u8 bCoreMutex; /* True to enable core mutexing */ 3701 u8 bFullMutex; /* True to enable full mutexing */ 3702 u8 bOpenUri; /* True to interpret filenames as URIs */ 3703 u8 bUseCis; /* Use covering indices for full-scans */ 3704 u8 bSmallMalloc; /* Avoid large memory allocations if true */ 3705 u8 bExtraSchemaChecks; /* Verify type,name,tbl_name in schema */ 3706 int mxStrlen; /* Maximum string length */ 3707 int neverCorrupt; /* Database is always well-formed */ 3708 int szLookaside; /* Default lookaside buffer size */ 3709 int nLookaside; /* Default lookaside buffer count */ 3710 int nStmtSpill; /* Stmt-journal spill-to-disk threshold */ 3711 sqlite3_mem_methods m; /* Low-level memory allocation interface */ 3712 sqlite3_mutex_methods mutex; /* Low-level mutex interface */ 3713 sqlite3_pcache_methods2 pcache2; /* Low-level page-cache interface */ 3714 void *pHeap; /* Heap storage space */ 3715 int nHeap; /* Size of pHeap[] */ 3716 int mnReq, mxReq; /* Min and max heap requests sizes */ 3717 sqlite3_int64 szMmap; /* mmap() space per open file */ 3718 sqlite3_int64 mxMmap; /* Maximum value for szMmap */ 3719 void *pPage; /* Page cache memory */ 3720 int szPage; /* Size of each page in pPage[] */ 3721 int nPage; /* Number of pages in pPage[] */ 3722 int mxParserStack; /* maximum depth of the parser stack */ 3723 int sharedCacheEnabled; /* true if shared-cache mode enabled */ 3724 u32 szPma; /* Maximum Sorter PMA size */ 3725 /* The above might be initialized to non-zero. The following need to always 3726 ** initially be zero, however. */ 3727 int isInit; /* True after initialization has finished */ 3728 int inProgress; /* True while initialization in progress */ 3729 int isMutexInit; /* True after mutexes are initialized */ 3730 int isMallocInit; /* True after malloc is initialized */ 3731 int isPCacheInit; /* True after malloc is initialized */ 3732 int nRefInitMutex; /* Number of users of pInitMutex */ 3733 sqlite3_mutex *pInitMutex; /* Mutex used by sqlite3_initialize() */ 3734 void (*xLog)(void*,int,const char*); /* Function for logging */ 3735 void *pLogArg; /* First argument to xLog() */ 3736 #ifdef SQLITE_ENABLE_SQLLOG 3737 void(*xSqllog)(void*,sqlite3*,const char*, int); 3738 void *pSqllogArg; 3739 #endif 3740 #ifdef SQLITE_VDBE_COVERAGE 3741 /* The following callback (if not NULL) is invoked on every VDBE branch 3742 ** operation. Set the callback using SQLITE_TESTCTRL_VDBE_COVERAGE. 3743 */ 3744 void (*xVdbeBranch)(void*,unsigned iSrcLine,u8 eThis,u8 eMx); /* Callback */ 3745 void *pVdbeBranchArg; /* 1st argument */ 3746 #endif 3747 #ifdef SQLITE_ENABLE_DESERIALIZE 3748 sqlite3_int64 mxMemdbSize; /* Default max memdb size */ 3749 #endif 3750 #ifndef SQLITE_UNTESTABLE 3751 int (*xTestCallback)(int); /* Invoked by sqlite3FaultSim() */ 3752 #endif 3753 int bLocaltimeFault; /* True to fail localtime() calls */ 3754 int iOnceResetThreshold; /* When to reset OP_Once counters */ 3755 u32 szSorterRef; /* Min size in bytes to use sorter-refs */ 3756 unsigned int iPrngSeed; /* Alternative fixed seed for the PRNG */ 3757 }; 3758 3759 /* 3760 ** This macro is used inside of assert() statements to indicate that 3761 ** the assert is only valid on a well-formed database. Instead of: 3762 ** 3763 ** assert( X ); 3764 ** 3765 ** One writes: 3766 ** 3767 ** assert( X || CORRUPT_DB ); 3768 ** 3769 ** CORRUPT_DB is true during normal operation. CORRUPT_DB does not indicate 3770 ** that the database is definitely corrupt, only that it might be corrupt. 3771 ** For most test cases, CORRUPT_DB is set to false using a special 3772 ** sqlite3_test_control(). This enables assert() statements to prove 3773 ** things that are always true for well-formed databases. 3774 */ 3775 #define CORRUPT_DB (sqlite3Config.neverCorrupt==0) 3776 3777 /* 3778 ** Context pointer passed down through the tree-walk. 3779 */ 3780 struct Walker { 3781 Parse *pParse; /* Parser context. */ 3782 int (*xExprCallback)(Walker*, Expr*); /* Callback for expressions */ 3783 int (*xSelectCallback)(Walker*,Select*); /* Callback for SELECTs */ 3784 void (*xSelectCallback2)(Walker*,Select*);/* Second callback for SELECTs */ 3785 int walkerDepth; /* Number of subqueries */ 3786 u16 eCode; /* A small processing code */ 3787 union { /* Extra data for callback */ 3788 NameContext *pNC; /* Naming context */ 3789 int n; /* A counter */ 3790 int iCur; /* A cursor number */ 3791 SrcList *pSrcList; /* FROM clause */ 3792 struct SrcCount *pSrcCount; /* Counting column references */ 3793 struct CCurHint *pCCurHint; /* Used by codeCursorHint() */ 3794 int *aiCol; /* array of column indexes */ 3795 struct IdxCover *pIdxCover; /* Check for index coverage */ 3796 struct IdxExprTrans *pIdxTrans; /* Convert idxed expr to column */ 3797 ExprList *pGroupBy; /* GROUP BY clause */ 3798 Select *pSelect; /* HAVING to WHERE clause ctx */ 3799 struct WindowRewrite *pRewrite; /* Window rewrite context */ 3800 struct WhereConst *pConst; /* WHERE clause constants */ 3801 struct RenameCtx *pRename; /* RENAME COLUMN context */ 3802 struct Table *pTab; /* Table of generated column */ 3803 struct SrcList_item *pSrcItem; /* A single FROM clause item */ 3804 DbFixer *pFix; 3805 } u; 3806 }; 3807 3808 /* 3809 ** The following structure contains information used by the sqliteFix... 3810 ** routines as they walk the parse tree to make database references 3811 ** explicit. 3812 */ 3813 struct DbFixer { 3814 Parse *pParse; /* The parsing context. Error messages written here */ 3815 Walker w; /* Walker object */ 3816 Schema *pSchema; /* Fix items to this schema */ 3817 u8 bTemp; /* True for TEMP schema entries */ 3818 const char *zDb; /* Make sure all objects are contained in this database */ 3819 const char *zType; /* Type of the container - used for error messages */ 3820 const Token *pName; /* Name of the container - used for error messages */ 3821 }; 3822 3823 /* Forward declarations */ 3824 int sqlite3WalkExpr(Walker*, Expr*); 3825 int sqlite3WalkExprList(Walker*, ExprList*); 3826 int sqlite3WalkSelect(Walker*, Select*); 3827 int sqlite3WalkSelectExpr(Walker*, Select*); 3828 int sqlite3WalkSelectFrom(Walker*, Select*); 3829 int sqlite3ExprWalkNoop(Walker*, Expr*); 3830 int sqlite3SelectWalkNoop(Walker*, Select*); 3831 int sqlite3SelectWalkFail(Walker*, Select*); 3832 int sqlite3WalkerDepthIncrease(Walker*,Select*); 3833 void sqlite3WalkerDepthDecrease(Walker*,Select*); 3834 3835 #ifdef SQLITE_DEBUG 3836 void sqlite3SelectWalkAssert2(Walker*, Select*); 3837 #endif 3838 3839 /* 3840 ** Return code from the parse-tree walking primitives and their 3841 ** callbacks. 3842 */ 3843 #define WRC_Continue 0 /* Continue down into children */ 3844 #define WRC_Prune 1 /* Omit children but continue walking siblings */ 3845 #define WRC_Abort 2 /* Abandon the tree walk */ 3846 3847 /* 3848 ** An instance of this structure represents a set of one or more CTEs 3849 ** (common table expressions) created by a single WITH clause. 3850 */ 3851 struct With { 3852 int nCte; /* Number of CTEs in the WITH clause */ 3853 With *pOuter; /* Containing WITH clause, or NULL */ 3854 struct Cte { /* For each CTE in the WITH clause.... */ 3855 char *zName; /* Name of this CTE */ 3856 ExprList *pCols; /* List of explicit column names, or NULL */ 3857 Select *pSelect; /* The definition of this CTE */ 3858 const char *zCteErr; /* Error message for circular references */ 3859 } a[1]; 3860 }; 3861 3862 #ifdef SQLITE_DEBUG 3863 /* 3864 ** An instance of the TreeView object is used for printing the content of 3865 ** data structures on sqlite3DebugPrintf() using a tree-like view. 3866 */ 3867 struct TreeView { 3868 int iLevel; /* Which level of the tree we are on */ 3869 u8 bLine[100]; /* Draw vertical in column i if bLine[i] is true */ 3870 }; 3871 #endif /* SQLITE_DEBUG */ 3872 3873 /* 3874 ** This object is used in various ways, most (but not all) related to window 3875 ** functions. 3876 ** 3877 ** (1) A single instance of this structure is attached to the 3878 ** the Expr.y.pWin field for each window function in an expression tree. 3879 ** This object holds the information contained in the OVER clause, 3880 ** plus additional fields used during code generation. 3881 ** 3882 ** (2) All window functions in a single SELECT form a linked-list 3883 ** attached to Select.pWin. The Window.pFunc and Window.pExpr 3884 ** fields point back to the expression that is the window function. 3885 ** 3886 ** (3) The terms of the WINDOW clause of a SELECT are instances of this 3887 ** object on a linked list attached to Select.pWinDefn. 3888 ** 3889 ** (4) For an aggregate function with a FILTER clause, an instance 3890 ** of this object is stored in Expr.y.pWin with eFrmType set to 3891 ** TK_FILTER. In this case the only field used is Window.pFilter. 3892 ** 3893 ** The uses (1) and (2) are really the same Window object that just happens 3894 ** to be accessible in two different ways. Use case (3) are separate objects. 3895 */ 3896 struct Window { 3897 char *zName; /* Name of window (may be NULL) */ 3898 char *zBase; /* Name of base window for chaining (may be NULL) */ 3899 ExprList *pPartition; /* PARTITION BY clause */ 3900 ExprList *pOrderBy; /* ORDER BY clause */ 3901 u8 eFrmType; /* TK_RANGE, TK_GROUPS, TK_ROWS, or 0 */ 3902 u8 eStart; /* UNBOUNDED, CURRENT, PRECEDING or FOLLOWING */ 3903 u8 eEnd; /* UNBOUNDED, CURRENT, PRECEDING or FOLLOWING */ 3904 u8 bImplicitFrame; /* True if frame was implicitly specified */ 3905 u8 eExclude; /* TK_NO, TK_CURRENT, TK_TIES, TK_GROUP, or 0 */ 3906 Expr *pStart; /* Expression for "<expr> PRECEDING" */ 3907 Expr *pEnd; /* Expression for "<expr> FOLLOWING" */ 3908 Window **ppThis; /* Pointer to this object in Select.pWin list */ 3909 Window *pNextWin; /* Next window function belonging to this SELECT */ 3910 Expr *pFilter; /* The FILTER expression */ 3911 FuncDef *pFunc; /* The function */ 3912 int iEphCsr; /* Partition buffer or Peer buffer */ 3913 int regAccum; /* Accumulator */ 3914 int regResult; /* Interim result */ 3915 int csrApp; /* Function cursor (used by min/max) */ 3916 int regApp; /* Function register (also used by min/max) */ 3917 int regPart; /* Array of registers for PARTITION BY values */ 3918 Expr *pOwner; /* Expression object this window is attached to */ 3919 int nBufferCol; /* Number of columns in buffer table */ 3920 int iArgCol; /* Offset of first argument for this function */ 3921 int regOne; /* Register containing constant value 1 */ 3922 int regStartRowid; 3923 int regEndRowid; 3924 u8 bExprArgs; /* Defer evaluation of window function arguments 3925 ** due to the SQLITE_SUBTYPE flag */ 3926 }; 3927 3928 #ifndef SQLITE_OMIT_WINDOWFUNC 3929 void sqlite3WindowDelete(sqlite3*, Window*); 3930 void sqlite3WindowUnlinkFromSelect(Window*); 3931 void sqlite3WindowListDelete(sqlite3 *db, Window *p); 3932 Window *sqlite3WindowAlloc(Parse*, int, int, Expr*, int , Expr*, u8); 3933 void sqlite3WindowAttach(Parse*, Expr*, Window*); 3934 void sqlite3WindowLink(Select *pSel, Window *pWin); 3935 int sqlite3WindowCompare(Parse*, Window*, Window*, int); 3936 void sqlite3WindowCodeInit(Parse*, Select*); 3937 void sqlite3WindowCodeStep(Parse*, Select*, WhereInfo*, int, int); 3938 int sqlite3WindowRewrite(Parse*, Select*); 3939 void sqlite3WindowUpdate(Parse*, Window*, Window*, FuncDef*); 3940 Window *sqlite3WindowDup(sqlite3 *db, Expr *pOwner, Window *p); 3941 Window *sqlite3WindowListDup(sqlite3 *db, Window *p); 3942 void sqlite3WindowFunctions(void); 3943 void sqlite3WindowChain(Parse*, Window*, Window*); 3944 Window *sqlite3WindowAssemble(Parse*, Window*, ExprList*, ExprList*, Token*); 3945 #else 3946 # define sqlite3WindowDelete(a,b) 3947 # define sqlite3WindowFunctions() 3948 # define sqlite3WindowAttach(a,b,c) 3949 #endif 3950 3951 /* 3952 ** Assuming zIn points to the first byte of a UTF-8 character, 3953 ** advance zIn to point to the first byte of the next UTF-8 character. 3954 */ 3955 #define SQLITE_SKIP_UTF8(zIn) { \ 3956 if( (*(zIn++))>=0xc0 ){ \ 3957 while( (*zIn & 0xc0)==0x80 ){ zIn++; } \ 3958 } \ 3959 } 3960 3961 /* 3962 ** The SQLITE_*_BKPT macros are substitutes for the error codes with 3963 ** the same name but without the _BKPT suffix. These macros invoke 3964 ** routines that report the line-number on which the error originated 3965 ** using sqlite3_log(). The routines also provide a convenient place 3966 ** to set a debugger breakpoint. 3967 */ 3968 int sqlite3ReportError(int iErr, int lineno, const char *zType); 3969 int sqlite3CorruptError(int); 3970 int sqlite3MisuseError(int); 3971 int sqlite3CantopenError(int); 3972 #define SQLITE_CORRUPT_BKPT sqlite3CorruptError(__LINE__) 3973 #define SQLITE_MISUSE_BKPT sqlite3MisuseError(__LINE__) 3974 #define SQLITE_CANTOPEN_BKPT sqlite3CantopenError(__LINE__) 3975 #ifdef SQLITE_DEBUG 3976 int sqlite3NomemError(int); 3977 int sqlite3IoerrnomemError(int); 3978 # define SQLITE_NOMEM_BKPT sqlite3NomemError(__LINE__) 3979 # define SQLITE_IOERR_NOMEM_BKPT sqlite3IoerrnomemError(__LINE__) 3980 #else 3981 # define SQLITE_NOMEM_BKPT SQLITE_NOMEM 3982 # define SQLITE_IOERR_NOMEM_BKPT SQLITE_IOERR_NOMEM 3983 #endif 3984 #if defined(SQLITE_DEBUG) || defined(SQLITE_ENABLE_CORRUPT_PGNO) 3985 int sqlite3CorruptPgnoError(int,Pgno); 3986 # define SQLITE_CORRUPT_PGNO(P) sqlite3CorruptPgnoError(__LINE__,(P)) 3987 #else 3988 # define SQLITE_CORRUPT_PGNO(P) sqlite3CorruptError(__LINE__) 3989 #endif 3990 3991 /* 3992 ** FTS3 and FTS4 both require virtual table support 3993 */ 3994 #if defined(SQLITE_OMIT_VIRTUALTABLE) 3995 # undef SQLITE_ENABLE_FTS3 3996 # undef SQLITE_ENABLE_FTS4 3997 #endif 3998 3999 /* 4000 ** FTS4 is really an extension for FTS3. It is enabled using the 4001 ** SQLITE_ENABLE_FTS3 macro. But to avoid confusion we also call 4002 ** the SQLITE_ENABLE_FTS4 macro to serve as an alias for SQLITE_ENABLE_FTS3. 4003 */ 4004 #if defined(SQLITE_ENABLE_FTS4) && !defined(SQLITE_ENABLE_FTS3) 4005 # define SQLITE_ENABLE_FTS3 1 4006 #endif 4007 4008 /* 4009 ** The ctype.h header is needed for non-ASCII systems. It is also 4010 ** needed by FTS3 when FTS3 is included in the amalgamation. 4011 */ 4012 #if !defined(SQLITE_ASCII) || \ 4013 (defined(SQLITE_ENABLE_FTS3) && defined(SQLITE_AMALGAMATION)) 4014 # include <ctype.h> 4015 #endif 4016 4017 /* 4018 ** The following macros mimic the standard library functions toupper(), 4019 ** isspace(), isalnum(), isdigit() and isxdigit(), respectively. The 4020 ** sqlite versions only work for ASCII characters, regardless of locale. 4021 */ 4022 #ifdef SQLITE_ASCII 4023 # define sqlite3Toupper(x) ((x)&~(sqlite3CtypeMap[(unsigned char)(x)]&0x20)) 4024 # define sqlite3Isspace(x) (sqlite3CtypeMap[(unsigned char)(x)]&0x01) 4025 # define sqlite3Isalnum(x) (sqlite3CtypeMap[(unsigned char)(x)]&0x06) 4026 # define sqlite3Isalpha(x) (sqlite3CtypeMap[(unsigned char)(x)]&0x02) 4027 # define sqlite3Isdigit(x) (sqlite3CtypeMap[(unsigned char)(x)]&0x04) 4028 # define sqlite3Isxdigit(x) (sqlite3CtypeMap[(unsigned char)(x)]&0x08) 4029 # define sqlite3Tolower(x) (sqlite3UpperToLower[(unsigned char)(x)]) 4030 # define sqlite3Isquote(x) (sqlite3CtypeMap[(unsigned char)(x)]&0x80) 4031 #else 4032 # define sqlite3Toupper(x) toupper((unsigned char)(x)) 4033 # define sqlite3Isspace(x) isspace((unsigned char)(x)) 4034 # define sqlite3Isalnum(x) isalnum((unsigned char)(x)) 4035 # define sqlite3Isalpha(x) isalpha((unsigned char)(x)) 4036 # define sqlite3Isdigit(x) isdigit((unsigned char)(x)) 4037 # define sqlite3Isxdigit(x) isxdigit((unsigned char)(x)) 4038 # define sqlite3Tolower(x) tolower((unsigned char)(x)) 4039 # define sqlite3Isquote(x) ((x)=='"'||(x)=='\''||(x)=='['||(x)=='`') 4040 #endif 4041 int sqlite3IsIdChar(u8); 4042 4043 /* 4044 ** Internal function prototypes 4045 */ 4046 int sqlite3StrICmp(const char*,const char*); 4047 int sqlite3Strlen30(const char*); 4048 #define sqlite3Strlen30NN(C) (strlen(C)&0x3fffffff) 4049 char *sqlite3ColumnType(Column*,char*); 4050 #define sqlite3StrNICmp sqlite3_strnicmp 4051 4052 int sqlite3MallocInit(void); 4053 void sqlite3MallocEnd(void); 4054 void *sqlite3Malloc(u64); 4055 void *sqlite3MallocZero(u64); 4056 void *sqlite3DbMallocZero(sqlite3*, u64); 4057 void *sqlite3DbMallocRaw(sqlite3*, u64); 4058 void *sqlite3DbMallocRawNN(sqlite3*, u64); 4059 char *sqlite3DbStrDup(sqlite3*,const char*); 4060 char *sqlite3DbStrNDup(sqlite3*,const char*, u64); 4061 char *sqlite3DbSpanDup(sqlite3*,const char*,const char*); 4062 void *sqlite3Realloc(void*, u64); 4063 void *sqlite3DbReallocOrFree(sqlite3 *, void *, u64); 4064 void *sqlite3DbRealloc(sqlite3 *, void *, u64); 4065 void sqlite3DbFree(sqlite3*, void*); 4066 void sqlite3DbFreeNN(sqlite3*, void*); 4067 int sqlite3MallocSize(void*); 4068 int sqlite3DbMallocSize(sqlite3*, void*); 4069 void *sqlite3PageMalloc(int); 4070 void sqlite3PageFree(void*); 4071 void sqlite3MemSetDefault(void); 4072 #ifndef SQLITE_UNTESTABLE 4073 void sqlite3BenignMallocHooks(void (*)(void), void (*)(void)); 4074 #endif 4075 int sqlite3HeapNearlyFull(void); 4076 4077 /* 4078 ** On systems with ample stack space and that support alloca(), make 4079 ** use of alloca() to obtain space for large automatic objects. By default, 4080 ** obtain space from malloc(). 4081 ** 4082 ** The alloca() routine never returns NULL. This will cause code paths 4083 ** that deal with sqlite3StackAlloc() failures to be unreachable. 4084 */ 4085 #ifdef SQLITE_USE_ALLOCA 4086 # define sqlite3StackAllocRaw(D,N) alloca(N) 4087 # define sqlite3StackAllocZero(D,N) memset(alloca(N), 0, N) 4088 # define sqlite3StackFree(D,P) 4089 #else 4090 # define sqlite3StackAllocRaw(D,N) sqlite3DbMallocRaw(D,N) 4091 # define sqlite3StackAllocZero(D,N) sqlite3DbMallocZero(D,N) 4092 # define sqlite3StackFree(D,P) sqlite3DbFree(D,P) 4093 #endif 4094 4095 /* Do not allow both MEMSYS5 and MEMSYS3 to be defined together. If they 4096 ** are, disable MEMSYS3 4097 */ 4098 #ifdef SQLITE_ENABLE_MEMSYS5 4099 const sqlite3_mem_methods *sqlite3MemGetMemsys5(void); 4100 #undef SQLITE_ENABLE_MEMSYS3 4101 #endif 4102 #ifdef SQLITE_ENABLE_MEMSYS3 4103 const sqlite3_mem_methods *sqlite3MemGetMemsys3(void); 4104 #endif 4105 4106 4107 #ifndef SQLITE_MUTEX_OMIT 4108 sqlite3_mutex_methods const *sqlite3DefaultMutex(void); 4109 sqlite3_mutex_methods const *sqlite3NoopMutex(void); 4110 sqlite3_mutex *sqlite3MutexAlloc(int); 4111 int sqlite3MutexInit(void); 4112 int sqlite3MutexEnd(void); 4113 #endif 4114 #if !defined(SQLITE_MUTEX_OMIT) && !defined(SQLITE_MUTEX_NOOP) 4115 void sqlite3MemoryBarrier(void); 4116 #else 4117 # define sqlite3MemoryBarrier() 4118 #endif 4119 4120 sqlite3_int64 sqlite3StatusValue(int); 4121 void sqlite3StatusUp(int, int); 4122 void sqlite3StatusDown(int, int); 4123 void sqlite3StatusHighwater(int, int); 4124 int sqlite3LookasideUsed(sqlite3*,int*); 4125 4126 /* Access to mutexes used by sqlite3_status() */ 4127 sqlite3_mutex *sqlite3Pcache1Mutex(void); 4128 sqlite3_mutex *sqlite3MallocMutex(void); 4129 4130 #if defined(SQLITE_ENABLE_MULTITHREADED_CHECKS) && !defined(SQLITE_MUTEX_OMIT) 4131 void sqlite3MutexWarnOnContention(sqlite3_mutex*); 4132 #else 4133 # define sqlite3MutexWarnOnContention(x) 4134 #endif 4135 4136 #ifndef SQLITE_OMIT_FLOATING_POINT 4137 # define EXP754 (((u64)0x7ff)<<52) 4138 # define MAN754 ((((u64)1)<<52)-1) 4139 # define IsNaN(X) (((X)&EXP754)==EXP754 && ((X)&MAN754)!=0) 4140 int sqlite3IsNaN(double); 4141 #else 4142 # define IsNaN(X) 0 4143 # define sqlite3IsNaN(X) 0 4144 #endif 4145 4146 /* 4147 ** An instance of the following structure holds information about SQL 4148 ** functions arguments that are the parameters to the printf() function. 4149 */ 4150 struct PrintfArguments { 4151 int nArg; /* Total number of arguments */ 4152 int nUsed; /* Number of arguments used so far */ 4153 sqlite3_value **apArg; /* The argument values */ 4154 }; 4155 4156 char *sqlite3MPrintf(sqlite3*,const char*, ...); 4157 char *sqlite3VMPrintf(sqlite3*,const char*, va_list); 4158 #if defined(SQLITE_DEBUG) || defined(SQLITE_HAVE_OS_TRACE) 4159 void sqlite3DebugPrintf(const char*, ...); 4160 #endif 4161 #if defined(SQLITE_TEST) 4162 void *sqlite3TestTextToPtr(const char*); 4163 #endif 4164 4165 #if defined(SQLITE_DEBUG) 4166 void sqlite3TreeViewExpr(TreeView*, const Expr*, u8); 4167 void sqlite3TreeViewBareExprList(TreeView*, const ExprList*, const char*); 4168 void sqlite3TreeViewExprList(TreeView*, const ExprList*, u8, const char*); 4169 void sqlite3TreeViewSrcList(TreeView*, const SrcList*); 4170 void sqlite3TreeViewSelect(TreeView*, const Select*, u8); 4171 void sqlite3TreeViewWith(TreeView*, const With*, u8); 4172 #ifndef SQLITE_OMIT_WINDOWFUNC 4173 void sqlite3TreeViewWindow(TreeView*, const Window*, u8); 4174 void sqlite3TreeViewWinFunc(TreeView*, const Window*, u8); 4175 #endif 4176 #endif 4177 4178 4179 void sqlite3SetString(char **, sqlite3*, const char*); 4180 void sqlite3ErrorMsg(Parse*, const char*, ...); 4181 int sqlite3ErrorToParser(sqlite3*,int); 4182 void sqlite3Dequote(char*); 4183 void sqlite3DequoteExpr(Expr*); 4184 void sqlite3TokenInit(Token*,char*); 4185 int sqlite3KeywordCode(const unsigned char*, int); 4186 int sqlite3RunParser(Parse*, const char*, char **); 4187 void sqlite3FinishCoding(Parse*); 4188 int sqlite3GetTempReg(Parse*); 4189 void sqlite3ReleaseTempReg(Parse*,int); 4190 int sqlite3GetTempRange(Parse*,int); 4191 void sqlite3ReleaseTempRange(Parse*,int,int); 4192 void sqlite3ClearTempRegCache(Parse*); 4193 #ifdef SQLITE_DEBUG 4194 int sqlite3NoTempsInRange(Parse*,int,int); 4195 #endif 4196 Expr *sqlite3ExprAlloc(sqlite3*,int,const Token*,int); 4197 Expr *sqlite3Expr(sqlite3*,int,const char*); 4198 void sqlite3ExprAttachSubtrees(sqlite3*,Expr*,Expr*,Expr*); 4199 Expr *sqlite3PExpr(Parse*, int, Expr*, Expr*); 4200 void sqlite3PExprAddSelect(Parse*, Expr*, Select*); 4201 Expr *sqlite3ExprAnd(Parse*,Expr*, Expr*); 4202 Expr *sqlite3ExprSimplifiedAndOr(Expr*); 4203 Expr *sqlite3ExprFunction(Parse*,ExprList*, Token*, int); 4204 void sqlite3ExprFunctionUsable(Parse*,Expr*,FuncDef*); 4205 void sqlite3ExprAssignVarNumber(Parse*, Expr*, u32); 4206 void sqlite3ExprDelete(sqlite3*, Expr*); 4207 void sqlite3ExprUnmapAndDelete(Parse*, Expr*); 4208 ExprList *sqlite3ExprListAppend(Parse*,ExprList*,Expr*); 4209 ExprList *sqlite3ExprListAppendVector(Parse*,ExprList*,IdList*,Expr*); 4210 void sqlite3ExprListSetSortOrder(ExprList*,int,int); 4211 void sqlite3ExprListSetName(Parse*,ExprList*,Token*,int); 4212 void sqlite3ExprListSetSpan(Parse*,ExprList*,const char*,const char*); 4213 void sqlite3ExprListDelete(sqlite3*, ExprList*); 4214 u32 sqlite3ExprListFlags(const ExprList*); 4215 int sqlite3IndexHasDuplicateRootPage(Index*); 4216 int sqlite3Init(sqlite3*, char**); 4217 int sqlite3InitCallback(void*, int, char**, char**); 4218 int sqlite3InitOne(sqlite3*, int, char**, u32); 4219 void sqlite3Pragma(Parse*,Token*,Token*,Token*,int); 4220 #ifndef SQLITE_OMIT_VIRTUALTABLE 4221 Module *sqlite3PragmaVtabRegister(sqlite3*,const char *zName); 4222 #endif 4223 void sqlite3ResetAllSchemasOfConnection(sqlite3*); 4224 void sqlite3ResetOneSchema(sqlite3*,int); 4225 void sqlite3CollapseDatabaseArray(sqlite3*); 4226 void sqlite3CommitInternalChanges(sqlite3*); 4227 void sqlite3DeleteColumnNames(sqlite3*,Table*); 4228 int sqlite3ColumnsFromExprList(Parse*,ExprList*,i16*,Column**); 4229 void sqlite3SelectAddColumnTypeAndCollation(Parse*,Table*,Select*,char); 4230 Table *sqlite3ResultSetOfSelect(Parse*,Select*,char); 4231 void sqlite3OpenSchemaTable(Parse *, int); 4232 Index *sqlite3PrimaryKeyIndex(Table*); 4233 i16 sqlite3TableColumnToIndex(Index*, i16); 4234 #ifdef SQLITE_OMIT_GENERATED_COLUMNS 4235 # define sqlite3TableColumnToStorage(T,X) (X) /* No-op pass-through */ 4236 # define sqlite3StorageColumnToTable(T,X) (X) /* No-op pass-through */ 4237 #else 4238 i16 sqlite3TableColumnToStorage(Table*, i16); 4239 i16 sqlite3StorageColumnToTable(Table*, i16); 4240 #endif 4241 void sqlite3StartTable(Parse*,Token*,Token*,int,int,int,int); 4242 #if SQLITE_ENABLE_HIDDEN_COLUMNS 4243 void sqlite3ColumnPropertiesFromName(Table*, Column*); 4244 #else 4245 # define sqlite3ColumnPropertiesFromName(T,C) /* no-op */ 4246 #endif 4247 void sqlite3AddColumn(Parse*,Token*,Token*); 4248 void sqlite3AddNotNull(Parse*, int); 4249 void sqlite3AddPrimaryKey(Parse*, ExprList*, int, int, int); 4250 void sqlite3AddCheckConstraint(Parse*, Expr*, const char*, const char*); 4251 void sqlite3AddDefaultValue(Parse*,Expr*,const char*,const char*); 4252 void sqlite3AddCollateType(Parse*, Token*); 4253 void sqlite3AddGenerated(Parse*,Expr*,Token*); 4254 void sqlite3EndTable(Parse*,Token*,Token*,u8,Select*); 4255 int sqlite3ParseUri(const char*,const char*,unsigned int*, 4256 sqlite3_vfs**,char**,char **); 4257 #define sqlite3CodecQueryParameters(A,B,C) 0 4258 Btree *sqlite3DbNameToBtree(sqlite3*,const char*); 4259 4260 #ifdef SQLITE_UNTESTABLE 4261 # define sqlite3FaultSim(X) SQLITE_OK 4262 #else 4263 int sqlite3FaultSim(int); 4264 #endif 4265 4266 Bitvec *sqlite3BitvecCreate(u32); 4267 int sqlite3BitvecTest(Bitvec*, u32); 4268 int sqlite3BitvecTestNotNull(Bitvec*, u32); 4269 int sqlite3BitvecSet(Bitvec*, u32); 4270 void sqlite3BitvecClear(Bitvec*, u32, void*); 4271 void sqlite3BitvecDestroy(Bitvec*); 4272 u32 sqlite3BitvecSize(Bitvec*); 4273 #ifndef SQLITE_UNTESTABLE 4274 int sqlite3BitvecBuiltinTest(int,int*); 4275 #endif 4276 4277 RowSet *sqlite3RowSetInit(sqlite3*); 4278 void sqlite3RowSetDelete(void*); 4279 void sqlite3RowSetClear(void*); 4280 void sqlite3RowSetInsert(RowSet*, i64); 4281 int sqlite3RowSetTest(RowSet*, int iBatch, i64); 4282 int sqlite3RowSetNext(RowSet*, i64*); 4283 4284 void sqlite3CreateView(Parse*,Token*,Token*,Token*,ExprList*,Select*,int,int); 4285 4286 #if !defined(SQLITE_OMIT_VIEW) || !defined(SQLITE_OMIT_VIRTUALTABLE) 4287 int sqlite3ViewGetColumnNames(Parse*,Table*); 4288 #else 4289 # define sqlite3ViewGetColumnNames(A,B) 0 4290 #endif 4291 4292 #if SQLITE_MAX_ATTACHED>30 4293 int sqlite3DbMaskAllZero(yDbMask); 4294 #endif 4295 void sqlite3DropTable(Parse*, SrcList*, int, int); 4296 void sqlite3CodeDropTable(Parse*, Table*, int, int); 4297 void sqlite3DeleteTable(sqlite3*, Table*); 4298 void sqlite3FreeIndex(sqlite3*, Index*); 4299 #ifndef SQLITE_OMIT_AUTOINCREMENT 4300 void sqlite3AutoincrementBegin(Parse *pParse); 4301 void sqlite3AutoincrementEnd(Parse *pParse); 4302 #else 4303 # define sqlite3AutoincrementBegin(X) 4304 # define sqlite3AutoincrementEnd(X) 4305 #endif 4306 void sqlite3Insert(Parse*, SrcList*, Select*, IdList*, int, Upsert*); 4307 #ifndef SQLITE_OMIT_GENERATED_COLUMNS 4308 void sqlite3ComputeGeneratedColumns(Parse*, int, Table*); 4309 #endif 4310 void *sqlite3ArrayAllocate(sqlite3*,void*,int,int*,int*); 4311 IdList *sqlite3IdListAppend(Parse*, IdList*, Token*); 4312 int sqlite3IdListIndex(IdList*,const char*); 4313 SrcList *sqlite3SrcListEnlarge(Parse*, SrcList*, int, int); 4314 SrcList *sqlite3SrcListAppendList(Parse *pParse, SrcList *p1, SrcList *p2); 4315 SrcList *sqlite3SrcListAppend(Parse*, SrcList*, Token*, Token*); 4316 SrcList *sqlite3SrcListAppendFromTerm(Parse*, SrcList*, Token*, Token*, 4317 Token*, Select*, Expr*, IdList*); 4318 void sqlite3SrcListIndexedBy(Parse *, SrcList *, Token *); 4319 void sqlite3SrcListFuncArgs(Parse*, SrcList*, ExprList*); 4320 int sqlite3IndexedByLookup(Parse *, struct SrcList_item *); 4321 void sqlite3SrcListShiftJoinType(SrcList*); 4322 void sqlite3SrcListAssignCursors(Parse*, SrcList*); 4323 void sqlite3IdListDelete(sqlite3*, IdList*); 4324 void sqlite3SrcListDelete(sqlite3*, SrcList*); 4325 Index *sqlite3AllocateIndexObject(sqlite3*,i16,int,char**); 4326 void sqlite3CreateIndex(Parse*,Token*,Token*,SrcList*,ExprList*,int,Token*, 4327 Expr*, int, int, u8); 4328 void sqlite3DropIndex(Parse*, SrcList*, int); 4329 int sqlite3Select(Parse*, Select*, SelectDest*); 4330 Select *sqlite3SelectNew(Parse*,ExprList*,SrcList*,Expr*,ExprList*, 4331 Expr*,ExprList*,u32,Expr*); 4332 void sqlite3SelectDelete(sqlite3*, Select*); 4333 Table *sqlite3SrcListLookup(Parse*, SrcList*); 4334 int sqlite3IsReadOnly(Parse*, Table*, int); 4335 void sqlite3OpenTable(Parse*, int iCur, int iDb, Table*, int); 4336 #if defined(SQLITE_ENABLE_UPDATE_DELETE_LIMIT) && !defined(SQLITE_OMIT_SUBQUERY) 4337 Expr *sqlite3LimitWhere(Parse*,SrcList*,Expr*,ExprList*,Expr*,char*); 4338 #endif 4339 void sqlite3DeleteFrom(Parse*, SrcList*, Expr*, ExprList*, Expr*); 4340 void sqlite3Update(Parse*, SrcList*, ExprList*,Expr*,int,ExprList*,Expr*, 4341 Upsert*); 4342 WhereInfo *sqlite3WhereBegin(Parse*,SrcList*,Expr*,ExprList*,ExprList*,u16,int); 4343 void sqlite3WhereEnd(WhereInfo*); 4344 LogEst sqlite3WhereOutputRowCount(WhereInfo*); 4345 int sqlite3WhereIsDistinct(WhereInfo*); 4346 int sqlite3WhereIsOrdered(WhereInfo*); 4347 int sqlite3WhereOrderByLimitOptLabel(WhereInfo*); 4348 void sqlite3WhereMinMaxOptEarlyOut(Vdbe*,WhereInfo*); 4349 int sqlite3WhereIsSorted(WhereInfo*); 4350 int sqlite3WhereContinueLabel(WhereInfo*); 4351 int sqlite3WhereBreakLabel(WhereInfo*); 4352 int sqlite3WhereOkOnePass(WhereInfo*, int*); 4353 #define ONEPASS_OFF 0 /* Use of ONEPASS not allowed */ 4354 #define ONEPASS_SINGLE 1 /* ONEPASS valid for a single row update */ 4355 #define ONEPASS_MULTI 2 /* ONEPASS is valid for multiple rows */ 4356 int sqlite3WhereUsesDeferredSeek(WhereInfo*); 4357 void sqlite3ExprCodeLoadIndexColumn(Parse*, Index*, int, int, int); 4358 int sqlite3ExprCodeGetColumn(Parse*, Table*, int, int, int, u8); 4359 void sqlite3ExprCodeGetColumnOfTable(Vdbe*, Table*, int, int, int); 4360 void sqlite3ExprCodeMove(Parse*, int, int, int); 4361 void sqlite3ExprCode(Parse*, Expr*, int); 4362 #ifndef SQLITE_OMIT_GENERATED_COLUMNS 4363 void sqlite3ExprCodeGeneratedColumn(Parse*, Column*, int); 4364 #endif 4365 void sqlite3ExprCodeCopy(Parse*, Expr*, int); 4366 void sqlite3ExprCodeFactorable(Parse*, Expr*, int); 4367 int sqlite3ExprCodeRunJustOnce(Parse*, Expr*, int); 4368 int sqlite3ExprCodeTemp(Parse*, Expr*, int*); 4369 int sqlite3ExprCodeTarget(Parse*, Expr*, int); 4370 int sqlite3ExprCodeExprList(Parse*, ExprList*, int, int, u8); 4371 #define SQLITE_ECEL_DUP 0x01 /* Deep, not shallow copies */ 4372 #define SQLITE_ECEL_FACTOR 0x02 /* Factor out constant terms */ 4373 #define SQLITE_ECEL_REF 0x04 /* Use ExprList.u.x.iOrderByCol */ 4374 #define SQLITE_ECEL_OMITREF 0x08 /* Omit if ExprList.u.x.iOrderByCol */ 4375 void sqlite3ExprIfTrue(Parse*, Expr*, int, int); 4376 void sqlite3ExprIfFalse(Parse*, Expr*, int, int); 4377 void sqlite3ExprIfFalseDup(Parse*, Expr*, int, int); 4378 Table *sqlite3FindTable(sqlite3*,const char*, const char*); 4379 #define LOCATE_VIEW 0x01 4380 #define LOCATE_NOERR 0x02 4381 Table *sqlite3LocateTable(Parse*,u32 flags,const char*, const char*); 4382 Table *sqlite3LocateTableItem(Parse*,u32 flags,struct SrcList_item *); 4383 Index *sqlite3FindIndex(sqlite3*,const char*, const char*); 4384 void sqlite3UnlinkAndDeleteTable(sqlite3*,int,const char*); 4385 void sqlite3UnlinkAndDeleteIndex(sqlite3*,int,const char*); 4386 void sqlite3Vacuum(Parse*,Token*,Expr*); 4387 int sqlite3RunVacuum(char**, sqlite3*, int, sqlite3_value*); 4388 char *sqlite3NameFromToken(sqlite3*, Token*); 4389 int sqlite3ExprCompare(Parse*,Expr*, Expr*, int); 4390 int sqlite3ExprCompareSkip(Expr*, Expr*, int); 4391 int sqlite3ExprListCompare(ExprList*, ExprList*, int); 4392 int sqlite3ExprImpliesExpr(Parse*,Expr*, Expr*, int); 4393 int sqlite3ExprImpliesNonNullRow(Expr*,int); 4394 void sqlite3AggInfoPersistWalkerInit(Walker*,Parse*); 4395 void sqlite3ExprAnalyzeAggregates(NameContext*, Expr*); 4396 void sqlite3ExprAnalyzeAggList(NameContext*,ExprList*); 4397 int sqlite3ExprCoveredByIndex(Expr*, int iCur, Index *pIdx); 4398 int sqlite3FunctionUsesThisSrc(Expr*, SrcList*); 4399 Vdbe *sqlite3GetVdbe(Parse*); 4400 #ifndef SQLITE_UNTESTABLE 4401 void sqlite3PrngSaveState(void); 4402 void sqlite3PrngRestoreState(void); 4403 #endif 4404 void sqlite3RollbackAll(sqlite3*,int); 4405 void sqlite3CodeVerifySchema(Parse*, int); 4406 void sqlite3CodeVerifyNamedSchema(Parse*, const char *zDb); 4407 void sqlite3BeginTransaction(Parse*, int); 4408 void sqlite3EndTransaction(Parse*,int); 4409 void sqlite3Savepoint(Parse*, int, Token*); 4410 void sqlite3CloseSavepoints(sqlite3 *); 4411 void sqlite3LeaveMutexAndCloseZombie(sqlite3*); 4412 u32 sqlite3IsTrueOrFalse(const char*); 4413 int sqlite3ExprIdToTrueFalse(Expr*); 4414 int sqlite3ExprTruthValue(const Expr*); 4415 int sqlite3ExprIsConstant(Expr*); 4416 int sqlite3ExprIsConstantNotJoin(Expr*); 4417 int sqlite3ExprIsConstantOrFunction(Expr*, u8); 4418 int sqlite3ExprIsConstantOrGroupBy(Parse*, Expr*, ExprList*); 4419 int sqlite3ExprIsTableConstant(Expr*,int); 4420 #ifdef SQLITE_ENABLE_CURSOR_HINTS 4421 int sqlite3ExprContainsSubquery(Expr*); 4422 #endif 4423 int sqlite3ExprIsInteger(Expr*, int*); 4424 int sqlite3ExprCanBeNull(const Expr*); 4425 int sqlite3ExprNeedsNoAffinityChange(const Expr*, char); 4426 int sqlite3IsRowid(const char*); 4427 void sqlite3GenerateRowDelete( 4428 Parse*,Table*,Trigger*,int,int,int,i16,u8,u8,u8,int); 4429 void sqlite3GenerateRowIndexDelete(Parse*, Table*, int, int, int*, int); 4430 int sqlite3GenerateIndexKey(Parse*, Index*, int, int, int, int*,Index*,int); 4431 void sqlite3ResolvePartIdxLabel(Parse*,int); 4432 int sqlite3ExprReferencesUpdatedColumn(Expr*,int*,int); 4433 void sqlite3GenerateConstraintChecks(Parse*,Table*,int*,int,int,int,int, 4434 u8,u8,int,int*,int*,Upsert*); 4435 #ifdef SQLITE_ENABLE_NULL_TRIM 4436 void sqlite3SetMakeRecordP5(Vdbe*,Table*); 4437 #else 4438 # define sqlite3SetMakeRecordP5(A,B) 4439 #endif 4440 void sqlite3CompleteInsertion(Parse*,Table*,int,int,int,int*,int,int,int); 4441 int sqlite3OpenTableAndIndices(Parse*, Table*, int, u8, int, u8*, int*, int*); 4442 void sqlite3BeginWriteOperation(Parse*, int, int); 4443 void sqlite3MultiWrite(Parse*); 4444 void sqlite3MayAbort(Parse*); 4445 void sqlite3HaltConstraint(Parse*, int, int, char*, i8, u8); 4446 void sqlite3UniqueConstraint(Parse*, int, Index*); 4447 void sqlite3RowidConstraint(Parse*, int, Table*); 4448 Expr *sqlite3ExprDup(sqlite3*,Expr*,int); 4449 ExprList *sqlite3ExprListDup(sqlite3*,ExprList*,int); 4450 SrcList *sqlite3SrcListDup(sqlite3*,SrcList*,int); 4451 IdList *sqlite3IdListDup(sqlite3*,IdList*); 4452 Select *sqlite3SelectDup(sqlite3*,Select*,int); 4453 FuncDef *sqlite3FunctionSearch(int,const char*); 4454 void sqlite3InsertBuiltinFuncs(FuncDef*,int); 4455 FuncDef *sqlite3FindFunction(sqlite3*,const char*,int,u8,u8); 4456 void sqlite3RegisterBuiltinFunctions(void); 4457 void sqlite3RegisterDateTimeFunctions(void); 4458 void sqlite3RegisterPerConnectionBuiltinFunctions(sqlite3*); 4459 int sqlite3SafetyCheckOk(sqlite3*); 4460 int sqlite3SafetyCheckSickOrOk(sqlite3*); 4461 void sqlite3ChangeCookie(Parse*, int); 4462 4463 #if !defined(SQLITE_OMIT_VIEW) && !defined(SQLITE_OMIT_TRIGGER) 4464 void sqlite3MaterializeView(Parse*, Table*, Expr*, ExprList*,Expr*,int); 4465 #endif 4466 4467 #ifndef SQLITE_OMIT_TRIGGER 4468 void sqlite3BeginTrigger(Parse*, Token*,Token*,int,int,IdList*,SrcList*, 4469 Expr*,int, int); 4470 void sqlite3FinishTrigger(Parse*, TriggerStep*, Token*); 4471 void sqlite3DropTrigger(Parse*, SrcList*, int); 4472 void sqlite3DropTriggerPtr(Parse*, Trigger*); 4473 Trigger *sqlite3TriggersExist(Parse *, Table*, int, ExprList*, int *pMask); 4474 Trigger *sqlite3TriggerList(Parse *, Table *); 4475 void sqlite3CodeRowTrigger(Parse*, Trigger *, int, ExprList*, int, Table *, 4476 int, int, int); 4477 void sqlite3CodeRowTriggerDirect(Parse *, Trigger *, Table *, int, int, int); 4478 void sqliteViewTriggers(Parse*, Table*, Expr*, int, ExprList*); 4479 void sqlite3DeleteTriggerStep(sqlite3*, TriggerStep*); 4480 TriggerStep *sqlite3TriggerSelectStep(sqlite3*,Select*, 4481 const char*,const char*); 4482 TriggerStep *sqlite3TriggerInsertStep(Parse*,Token*, IdList*, 4483 Select*,u8,Upsert*, 4484 const char*,const char*); 4485 TriggerStep *sqlite3TriggerUpdateStep(Parse*,Token*,SrcList*,ExprList*, 4486 Expr*, u8, const char*,const char*); 4487 TriggerStep *sqlite3TriggerDeleteStep(Parse*,Token*, Expr*, 4488 const char*,const char*); 4489 void sqlite3DeleteTrigger(sqlite3*, Trigger*); 4490 void sqlite3UnlinkAndDeleteTrigger(sqlite3*,int,const char*); 4491 u32 sqlite3TriggerColmask(Parse*,Trigger*,ExprList*,int,int,Table*,int); 4492 SrcList *sqlite3TriggerStepSrc(Parse*, TriggerStep*); 4493 # define sqlite3ParseToplevel(p) ((p)->pToplevel ? (p)->pToplevel : (p)) 4494 # define sqlite3IsToplevel(p) ((p)->pToplevel==0) 4495 #else 4496 # define sqlite3TriggersExist(B,C,D,E,F) 0 4497 # define sqlite3DeleteTrigger(A,B) 4498 # define sqlite3DropTriggerPtr(A,B) 4499 # define sqlite3UnlinkAndDeleteTrigger(A,B,C) 4500 # define sqlite3CodeRowTrigger(A,B,C,D,E,F,G,H,I) 4501 # define sqlite3CodeRowTriggerDirect(A,B,C,D,E,F) 4502 # define sqlite3TriggerList(X, Y) 0 4503 # define sqlite3ParseToplevel(p) p 4504 # define sqlite3IsToplevel(p) 1 4505 # define sqlite3TriggerColmask(A,B,C,D,E,F,G) 0 4506 # define sqlite3TriggerStepSrc(A,B) 0 4507 #endif 4508 4509 int sqlite3JoinType(Parse*, Token*, Token*, Token*); 4510 void sqlite3SetJoinExpr(Expr*,int); 4511 void sqlite3CreateForeignKey(Parse*, ExprList*, Token*, ExprList*, int); 4512 void sqlite3DeferForeignKey(Parse*, int); 4513 #ifndef SQLITE_OMIT_AUTHORIZATION 4514 void sqlite3AuthRead(Parse*,Expr*,Schema*,SrcList*); 4515 int sqlite3AuthCheck(Parse*,int, const char*, const char*, const char*); 4516 void sqlite3AuthContextPush(Parse*, AuthContext*, const char*); 4517 void sqlite3AuthContextPop(AuthContext*); 4518 int sqlite3AuthReadCol(Parse*, const char *, const char *, int); 4519 #else 4520 # define sqlite3AuthRead(a,b,c,d) 4521 # define sqlite3AuthCheck(a,b,c,d,e) SQLITE_OK 4522 # define sqlite3AuthContextPush(a,b,c) 4523 # define sqlite3AuthContextPop(a) ((void)(a)) 4524 #endif 4525 int sqlite3DbIsNamed(sqlite3 *db, int iDb, const char *zName); 4526 void sqlite3Attach(Parse*, Expr*, Expr*, Expr*); 4527 void sqlite3Detach(Parse*, Expr*); 4528 void sqlite3FixInit(DbFixer*, Parse*, int, const char*, const Token*); 4529 int sqlite3FixSrcList(DbFixer*, SrcList*); 4530 int sqlite3FixSelect(DbFixer*, Select*); 4531 int sqlite3FixExpr(DbFixer*, Expr*); 4532 int sqlite3FixTriggerStep(DbFixer*, TriggerStep*); 4533 int sqlite3RealSameAsInt(double,sqlite3_int64); 4534 void sqlite3Int64ToText(i64,char*); 4535 int sqlite3AtoF(const char *z, double*, int, u8); 4536 int sqlite3GetInt32(const char *, int*); 4537 int sqlite3GetUInt32(const char*, u32*); 4538 int sqlite3Atoi(const char*); 4539 #ifndef SQLITE_OMIT_UTF16 4540 int sqlite3Utf16ByteLen(const void *pData, int nChar); 4541 #endif 4542 int sqlite3Utf8CharLen(const char *pData, int nByte); 4543 u32 sqlite3Utf8Read(const u8**); 4544 LogEst sqlite3LogEst(u64); 4545 LogEst sqlite3LogEstAdd(LogEst,LogEst); 4546 #ifndef SQLITE_OMIT_VIRTUALTABLE 4547 LogEst sqlite3LogEstFromDouble(double); 4548 #endif 4549 #if defined(SQLITE_ENABLE_STMT_SCANSTATUS) || \ 4550 defined(SQLITE_ENABLE_STAT4) || \ 4551 defined(SQLITE_EXPLAIN_ESTIMATED_ROWS) 4552 u64 sqlite3LogEstToInt(LogEst); 4553 #endif 4554 VList *sqlite3VListAdd(sqlite3*,VList*,const char*,int,int); 4555 const char *sqlite3VListNumToName(VList*,int); 4556 int sqlite3VListNameToNum(VList*,const char*,int); 4557 4558 /* 4559 ** Routines to read and write variable-length integers. These used to 4560 ** be defined locally, but now we use the varint routines in the util.c 4561 ** file. 4562 */ 4563 int sqlite3PutVarint(unsigned char*, u64); 4564 u8 sqlite3GetVarint(const unsigned char *, u64 *); 4565 u8 sqlite3GetVarint32(const unsigned char *, u32 *); 4566 int sqlite3VarintLen(u64 v); 4567 4568 /* 4569 ** The common case is for a varint to be a single byte. They following 4570 ** macros handle the common case without a procedure call, but then call 4571 ** the procedure for larger varints. 4572 */ 4573 #define getVarint32(A,B) \ 4574 (u8)((*(A)<(u8)0x80)?((B)=(u32)*(A)),1:sqlite3GetVarint32((A),(u32 *)&(B))) 4575 #define getVarint32NR(A,B) \ 4576 B=(u32)*(A);if(B>=0x80)sqlite3GetVarint32((A),(u32*)&(B)) 4577 #define putVarint32(A,B) \ 4578 (u8)(((u32)(B)<(u32)0x80)?(*(A)=(unsigned char)(B)),1:\ 4579 sqlite3PutVarint((A),(B))) 4580 #define getVarint sqlite3GetVarint 4581 #define putVarint sqlite3PutVarint 4582 4583 4584 const char *sqlite3IndexAffinityStr(sqlite3*, Index*); 4585 void sqlite3TableAffinity(Vdbe*, Table*, int); 4586 char sqlite3CompareAffinity(const Expr *pExpr, char aff2); 4587 int sqlite3IndexAffinityOk(const Expr *pExpr, char idx_affinity); 4588 char sqlite3TableColumnAffinity(Table*,int); 4589 char sqlite3ExprAffinity(const Expr *pExpr); 4590 int sqlite3Atoi64(const char*, i64*, int, u8); 4591 int sqlite3DecOrHexToI64(const char*, i64*); 4592 void sqlite3ErrorWithMsg(sqlite3*, int, const char*,...); 4593 void sqlite3Error(sqlite3*,int); 4594 void sqlite3ErrorClear(sqlite3*); 4595 void sqlite3SystemError(sqlite3*,int); 4596 void *sqlite3HexToBlob(sqlite3*, const char *z, int n); 4597 u8 sqlite3HexToInt(int h); 4598 int sqlite3TwoPartName(Parse *, Token *, Token *, Token **); 4599 4600 #if defined(SQLITE_NEED_ERR_NAME) 4601 const char *sqlite3ErrName(int); 4602 #endif 4603 4604 #ifdef SQLITE_ENABLE_DESERIALIZE 4605 int sqlite3MemdbInit(void); 4606 #endif 4607 4608 const char *sqlite3ErrStr(int); 4609 int sqlite3ReadSchema(Parse *pParse); 4610 CollSeq *sqlite3FindCollSeq(sqlite3*,u8 enc, const char*,int); 4611 int sqlite3IsBinary(const CollSeq*); 4612 CollSeq *sqlite3LocateCollSeq(Parse *pParse, const char*zName); 4613 void sqlite3SetTextEncoding(sqlite3 *db, u8); 4614 CollSeq *sqlite3ExprCollSeq(Parse *pParse, const Expr *pExpr); 4615 CollSeq *sqlite3ExprNNCollSeq(Parse *pParse, const Expr *pExpr); 4616 int sqlite3ExprCollSeqMatch(Parse*,const Expr*,const Expr*); 4617 Expr *sqlite3ExprAddCollateToken(Parse *pParse, Expr*, const Token*, int); 4618 Expr *sqlite3ExprAddCollateString(Parse*,Expr*,const char*); 4619 Expr *sqlite3ExprSkipCollate(Expr*); 4620 Expr *sqlite3ExprSkipCollateAndLikely(Expr*); 4621 int sqlite3CheckCollSeq(Parse *, CollSeq *); 4622 int sqlite3WritableSchema(sqlite3*); 4623 int sqlite3CheckObjectName(Parse*, const char*,const char*,const char*); 4624 void sqlite3VdbeSetChanges(sqlite3 *, int); 4625 int sqlite3AddInt64(i64*,i64); 4626 int sqlite3SubInt64(i64*,i64); 4627 int sqlite3MulInt64(i64*,i64); 4628 int sqlite3AbsInt32(int); 4629 #ifdef SQLITE_ENABLE_8_3_NAMES 4630 void sqlite3FileSuffix3(const char*, char*); 4631 #else 4632 # define sqlite3FileSuffix3(X,Y) 4633 #endif 4634 u8 sqlite3GetBoolean(const char *z,u8); 4635 4636 const void *sqlite3ValueText(sqlite3_value*, u8); 4637 int sqlite3ValueBytes(sqlite3_value*, u8); 4638 void sqlite3ValueSetStr(sqlite3_value*, int, const void *,u8, 4639 void(*)(void*)); 4640 void sqlite3ValueSetNull(sqlite3_value*); 4641 void sqlite3ValueFree(sqlite3_value*); 4642 #ifndef SQLITE_UNTESTABLE 4643 void sqlite3ResultIntReal(sqlite3_context*); 4644 #endif 4645 sqlite3_value *sqlite3ValueNew(sqlite3 *); 4646 #ifndef SQLITE_OMIT_UTF16 4647 char *sqlite3Utf16to8(sqlite3 *, const void*, int, u8); 4648 #endif 4649 int sqlite3ValueFromExpr(sqlite3 *, Expr *, u8, u8, sqlite3_value **); 4650 void sqlite3ValueApplyAffinity(sqlite3_value *, u8, u8); 4651 #ifndef SQLITE_AMALGAMATION 4652 extern const unsigned char sqlite3OpcodeProperty[]; 4653 extern const char sqlite3StrBINARY[]; 4654 extern const unsigned char sqlite3UpperToLower[]; 4655 extern const unsigned char sqlite3CtypeMap[]; 4656 extern SQLITE_WSD struct Sqlite3Config sqlite3Config; 4657 extern FuncDefHash sqlite3BuiltinFunctions; 4658 #ifndef SQLITE_OMIT_WSD 4659 extern int sqlite3PendingByte; 4660 #endif 4661 #endif /* SQLITE_AMALGAMATION */ 4662 #ifdef VDBE_PROFILE 4663 extern sqlite3_uint64 sqlite3NProfileCnt; 4664 #endif 4665 void sqlite3RootPageMoved(sqlite3*, int, Pgno, Pgno); 4666 void sqlite3Reindex(Parse*, Token*, Token*); 4667 void sqlite3AlterFunctions(void); 4668 void sqlite3AlterRenameTable(Parse*, SrcList*, Token*); 4669 void sqlite3AlterRenameColumn(Parse*, SrcList*, Token*, Token*); 4670 int sqlite3GetToken(const unsigned char *, int *); 4671 void sqlite3NestedParse(Parse*, const char*, ...); 4672 void sqlite3ExpirePreparedStatements(sqlite3*, int); 4673 void sqlite3CodeRhsOfIN(Parse*, Expr*, int); 4674 int sqlite3CodeSubselect(Parse*, Expr*); 4675 void sqlite3SelectPrep(Parse*, Select*, NameContext*); 4676 int sqlite3ExpandSubquery(Parse*, struct SrcList_item*); 4677 void sqlite3SelectWrongNumTermsError(Parse *pParse, Select *p); 4678 int sqlite3MatchEName( 4679 const struct ExprList_item*, 4680 const char*, 4681 const char*, 4682 const char* 4683 ); 4684 Bitmask sqlite3ExprColUsed(Expr*); 4685 u8 sqlite3StrIHash(const char*); 4686 int sqlite3ResolveExprNames(NameContext*, Expr*); 4687 int sqlite3ResolveExprListNames(NameContext*, ExprList*); 4688 void sqlite3ResolveSelectNames(Parse*, Select*, NameContext*); 4689 int sqlite3ResolveSelfReference(Parse*,Table*,int,Expr*,ExprList*); 4690 int sqlite3ResolveOrderGroupBy(Parse*, Select*, ExprList*, const char*); 4691 void sqlite3ColumnDefault(Vdbe *, Table *, int, int); 4692 void sqlite3AlterFinishAddColumn(Parse *, Token *); 4693 void sqlite3AlterBeginAddColumn(Parse *, SrcList *); 4694 void *sqlite3RenameTokenMap(Parse*, void*, Token*); 4695 void sqlite3RenameTokenRemap(Parse*, void *pTo, void *pFrom); 4696 void sqlite3RenameExprUnmap(Parse*, Expr*); 4697 void sqlite3RenameExprlistUnmap(Parse*, ExprList*); 4698 CollSeq *sqlite3GetCollSeq(Parse*, u8, CollSeq *, const char*); 4699 char sqlite3AffinityType(const char*, Column*); 4700 void sqlite3Analyze(Parse*, Token*, Token*); 4701 int sqlite3InvokeBusyHandler(BusyHandler*); 4702 int sqlite3FindDb(sqlite3*, Token*); 4703 int sqlite3FindDbName(sqlite3 *, const char *); 4704 int sqlite3AnalysisLoad(sqlite3*,int iDB); 4705 void sqlite3DeleteIndexSamples(sqlite3*,Index*); 4706 void sqlite3DefaultRowEst(Index*); 4707 void sqlite3RegisterLikeFunctions(sqlite3*, int); 4708 int sqlite3IsLikeFunction(sqlite3*,Expr*,int*,char*); 4709 void sqlite3SchemaClear(void *); 4710 Schema *sqlite3SchemaGet(sqlite3 *, Btree *); 4711 int sqlite3SchemaToIndex(sqlite3 *db, Schema *); 4712 KeyInfo *sqlite3KeyInfoAlloc(sqlite3*,int,int); 4713 void sqlite3KeyInfoUnref(KeyInfo*); 4714 KeyInfo *sqlite3KeyInfoRef(KeyInfo*); 4715 KeyInfo *sqlite3KeyInfoOfIndex(Parse*, Index*); 4716 KeyInfo *sqlite3KeyInfoFromExprList(Parse*, ExprList*, int, int); 4717 int sqlite3HasExplicitNulls(Parse*, ExprList*); 4718 4719 #ifdef SQLITE_DEBUG 4720 int sqlite3KeyInfoIsWriteable(KeyInfo*); 4721 #endif 4722 int sqlite3CreateFunc(sqlite3 *, const char *, int, int, void *, 4723 void (*)(sqlite3_context*,int,sqlite3_value **), 4724 void (*)(sqlite3_context*,int,sqlite3_value **), 4725 void (*)(sqlite3_context*), 4726 void (*)(sqlite3_context*), 4727 void (*)(sqlite3_context*,int,sqlite3_value **), 4728 FuncDestructor *pDestructor 4729 ); 4730 void sqlite3NoopDestructor(void*); 4731 void sqlite3OomFault(sqlite3*); 4732 void sqlite3OomClear(sqlite3*); 4733 int sqlite3ApiExit(sqlite3 *db, int); 4734 int sqlite3OpenTempDatabase(Parse *); 4735 4736 void sqlite3StrAccumInit(StrAccum*, sqlite3*, char*, int, int); 4737 char *sqlite3StrAccumFinish(StrAccum*); 4738 void sqlite3SelectDestInit(SelectDest*,int,int); 4739 Expr *sqlite3CreateColumnExpr(sqlite3 *, SrcList *, int, int); 4740 4741 void sqlite3BackupRestart(sqlite3_backup *); 4742 void sqlite3BackupUpdate(sqlite3_backup *, Pgno, const u8 *); 4743 4744 #ifndef SQLITE_OMIT_SUBQUERY 4745 int sqlite3ExprCheckIN(Parse*, Expr*); 4746 #else 4747 # define sqlite3ExprCheckIN(x,y) SQLITE_OK 4748 #endif 4749 4750 #ifdef SQLITE_ENABLE_STAT4 4751 int sqlite3Stat4ProbeSetValue( 4752 Parse*,Index*,UnpackedRecord**,Expr*,int,int,int*); 4753 int sqlite3Stat4ValueFromExpr(Parse*, Expr*, u8, sqlite3_value**); 4754 void sqlite3Stat4ProbeFree(UnpackedRecord*); 4755 int sqlite3Stat4Column(sqlite3*, const void*, int, int, sqlite3_value**); 4756 char sqlite3IndexColumnAffinity(sqlite3*, Index*, int); 4757 #endif 4758 4759 /* 4760 ** The interface to the LEMON-generated parser 4761 */ 4762 #ifndef SQLITE_AMALGAMATION 4763 void *sqlite3ParserAlloc(void*(*)(u64), Parse*); 4764 void sqlite3ParserFree(void*, void(*)(void*)); 4765 #endif 4766 void sqlite3Parser(void*, int, Token); 4767 int sqlite3ParserFallback(int); 4768 #ifdef YYTRACKMAXSTACKDEPTH 4769 int sqlite3ParserStackPeak(void*); 4770 #endif 4771 4772 void sqlite3AutoLoadExtensions(sqlite3*); 4773 #ifndef SQLITE_OMIT_LOAD_EXTENSION 4774 void sqlite3CloseExtensions(sqlite3*); 4775 #else 4776 # define sqlite3CloseExtensions(X) 4777 #endif 4778 4779 #ifndef SQLITE_OMIT_SHARED_CACHE 4780 void sqlite3TableLock(Parse *, int, Pgno, u8, const char *); 4781 #else 4782 #define sqlite3TableLock(v,w,x,y,z) 4783 #endif 4784 4785 #ifdef SQLITE_TEST 4786 int sqlite3Utf8To8(unsigned char*); 4787 #endif 4788 4789 #ifdef SQLITE_OMIT_VIRTUALTABLE 4790 # define sqlite3VtabClear(Y) 4791 # define sqlite3VtabSync(X,Y) SQLITE_OK 4792 # define sqlite3VtabRollback(X) 4793 # define sqlite3VtabCommit(X) 4794 # define sqlite3VtabInSync(db) 0 4795 # define sqlite3VtabLock(X) 4796 # define sqlite3VtabUnlock(X) 4797 # define sqlite3VtabModuleUnref(D,X) 4798 # define sqlite3VtabUnlockList(X) 4799 # define sqlite3VtabSavepoint(X, Y, Z) SQLITE_OK 4800 # define sqlite3GetVTable(X,Y) ((VTable*)0) 4801 #else 4802 void sqlite3VtabClear(sqlite3 *db, Table*); 4803 void sqlite3VtabDisconnect(sqlite3 *db, Table *p); 4804 int sqlite3VtabSync(sqlite3 *db, Vdbe*); 4805 int sqlite3VtabRollback(sqlite3 *db); 4806 int sqlite3VtabCommit(sqlite3 *db); 4807 void sqlite3VtabLock(VTable *); 4808 void sqlite3VtabUnlock(VTable *); 4809 void sqlite3VtabModuleUnref(sqlite3*,Module*); 4810 void sqlite3VtabUnlockList(sqlite3*); 4811 int sqlite3VtabSavepoint(sqlite3 *, int, int); 4812 void sqlite3VtabImportErrmsg(Vdbe*, sqlite3_vtab*); 4813 VTable *sqlite3GetVTable(sqlite3*, Table*); 4814 Module *sqlite3VtabCreateModule( 4815 sqlite3*, 4816 const char*, 4817 const sqlite3_module*, 4818 void*, 4819 void(*)(void*) 4820 ); 4821 # define sqlite3VtabInSync(db) ((db)->nVTrans>0 && (db)->aVTrans==0) 4822 #endif 4823 int sqlite3ReadOnlyShadowTables(sqlite3 *db); 4824 #ifndef SQLITE_OMIT_VIRTUALTABLE 4825 int sqlite3ShadowTableName(sqlite3 *db, const char *zName); 4826 int sqlite3IsShadowTableOf(sqlite3*,Table*,const char*); 4827 #else 4828 # define sqlite3ShadowTableName(A,B) 0 4829 # define sqlite3IsShadowTableOf(A,B,C) 0 4830 #endif 4831 int sqlite3VtabEponymousTableInit(Parse*,Module*); 4832 void sqlite3VtabEponymousTableClear(sqlite3*,Module*); 4833 void sqlite3VtabMakeWritable(Parse*,Table*); 4834 void sqlite3VtabBeginParse(Parse*, Token*, Token*, Token*, int); 4835 void sqlite3VtabFinishParse(Parse*, Token*); 4836 void sqlite3VtabArgInit(Parse*); 4837 void sqlite3VtabArgExtend(Parse*, Token*); 4838 int sqlite3VtabCallCreate(sqlite3*, int, const char *, char **); 4839 int sqlite3VtabCallConnect(Parse*, Table*); 4840 int sqlite3VtabCallDestroy(sqlite3*, int, const char *); 4841 int sqlite3VtabBegin(sqlite3 *, VTable *); 4842 FuncDef *sqlite3VtabOverloadFunction(sqlite3 *,FuncDef*, int nArg, Expr*); 4843 sqlite3_int64 sqlite3StmtCurrentTime(sqlite3_context*); 4844 int sqlite3VdbeParameterIndex(Vdbe*, const char*, int); 4845 int sqlite3TransferBindings(sqlite3_stmt *, sqlite3_stmt *); 4846 void sqlite3ParserReset(Parse*); 4847 void sqlite3ParserAddCleanup(Parse*,void(*)(sqlite3*,void*),void*); 4848 #ifdef SQLITE_ENABLE_NORMALIZE 4849 char *sqlite3Normalize(Vdbe*, const char*); 4850 #endif 4851 int sqlite3Reprepare(Vdbe*); 4852 void sqlite3ExprListCheckLength(Parse*, ExprList*, const char*); 4853 CollSeq *sqlite3ExprCompareCollSeq(Parse*,const Expr*); 4854 CollSeq *sqlite3BinaryCompareCollSeq(Parse *, const Expr*, const Expr*); 4855 int sqlite3TempInMemory(const sqlite3*); 4856 const char *sqlite3JournalModename(int); 4857 #ifndef SQLITE_OMIT_WAL 4858 int sqlite3Checkpoint(sqlite3*, int, int, int*, int*); 4859 int sqlite3WalDefaultHook(void*,sqlite3*,const char*,int); 4860 #endif 4861 #ifndef SQLITE_OMIT_CTE 4862 With *sqlite3WithAdd(Parse*,With*,Token*,ExprList*,Select*); 4863 void sqlite3WithDelete(sqlite3*,With*); 4864 void sqlite3WithPush(Parse*, With*, u8); 4865 #else 4866 #define sqlite3WithPush(x,y,z) 4867 #define sqlite3WithDelete(x,y) 4868 #endif 4869 #ifndef SQLITE_OMIT_UPSERT 4870 Upsert *sqlite3UpsertNew(sqlite3*,ExprList*,Expr*,ExprList*,Expr*,Upsert*); 4871 void sqlite3UpsertDelete(sqlite3*,Upsert*); 4872 Upsert *sqlite3UpsertDup(sqlite3*,Upsert*); 4873 int sqlite3UpsertAnalyzeTarget(Parse*,SrcList*,Upsert*); 4874 void sqlite3UpsertDoUpdate(Parse*,Upsert*,Table*,Index*,int); 4875 Upsert *sqlite3UpsertOfIndex(Upsert*,Index*); 4876 int sqlite3UpsertNextIsIPK(Upsert*); 4877 #else 4878 #define sqlite3UpsertNew(u,v,w,x,y,z) ((Upsert*)0) 4879 #define sqlite3UpsertDelete(x,y) 4880 #define sqlite3UpsertDup(x,y) ((Upsert*)0) 4881 #define sqlite3UpsertOfIndex(x,y) ((Upsert*)0) 4882 #define sqlite3UpsertNextIsIPK(x) 0 4883 #endif 4884 4885 4886 /* Declarations for functions in fkey.c. All of these are replaced by 4887 ** no-op macros if OMIT_FOREIGN_KEY is defined. In this case no foreign 4888 ** key functionality is available. If OMIT_TRIGGER is defined but 4889 ** OMIT_FOREIGN_KEY is not, only some of the functions are no-oped. In 4890 ** this case foreign keys are parsed, but no other functionality is 4891 ** provided (enforcement of FK constraints requires the triggers sub-system). 4892 */ 4893 #if !defined(SQLITE_OMIT_FOREIGN_KEY) && !defined(SQLITE_OMIT_TRIGGER) 4894 void sqlite3FkCheck(Parse*, Table*, int, int, int*, int); 4895 void sqlite3FkDropTable(Parse*, SrcList *, Table*); 4896 void sqlite3FkActions(Parse*, Table*, ExprList*, int, int*, int); 4897 int sqlite3FkRequired(Parse*, Table*, int*, int); 4898 u32 sqlite3FkOldmask(Parse*, Table*); 4899 FKey *sqlite3FkReferences(Table *); 4900 #else 4901 #define sqlite3FkActions(a,b,c,d,e,f) 4902 #define sqlite3FkCheck(a,b,c,d,e,f) 4903 #define sqlite3FkDropTable(a,b,c) 4904 #define sqlite3FkOldmask(a,b) 0 4905 #define sqlite3FkRequired(a,b,c,d) 0 4906 #define sqlite3FkReferences(a) 0 4907 #endif 4908 #ifndef SQLITE_OMIT_FOREIGN_KEY 4909 void sqlite3FkDelete(sqlite3 *, Table*); 4910 int sqlite3FkLocateIndex(Parse*,Table*,FKey*,Index**,int**); 4911 #else 4912 #define sqlite3FkDelete(a,b) 4913 #define sqlite3FkLocateIndex(a,b,c,d,e) 4914 #endif 4915 4916 4917 /* 4918 ** Available fault injectors. Should be numbered beginning with 0. 4919 */ 4920 #define SQLITE_FAULTINJECTOR_MALLOC 0 4921 #define SQLITE_FAULTINJECTOR_COUNT 1 4922 4923 /* 4924 ** The interface to the code in fault.c used for identifying "benign" 4925 ** malloc failures. This is only present if SQLITE_UNTESTABLE 4926 ** is not defined. 4927 */ 4928 #ifndef SQLITE_UNTESTABLE 4929 void sqlite3BeginBenignMalloc(void); 4930 void sqlite3EndBenignMalloc(void); 4931 #else 4932 #define sqlite3BeginBenignMalloc() 4933 #define sqlite3EndBenignMalloc() 4934 #endif 4935 4936 /* 4937 ** Allowed return values from sqlite3FindInIndex() 4938 */ 4939 #define IN_INDEX_ROWID 1 /* Search the rowid of the table */ 4940 #define IN_INDEX_EPH 2 /* Search an ephemeral b-tree */ 4941 #define IN_INDEX_INDEX_ASC 3 /* Existing index ASCENDING */ 4942 #define IN_INDEX_INDEX_DESC 4 /* Existing index DESCENDING */ 4943 #define IN_INDEX_NOOP 5 /* No table available. Use comparisons */ 4944 /* 4945 ** Allowed flags for the 3rd parameter to sqlite3FindInIndex(). 4946 */ 4947 #define IN_INDEX_NOOP_OK 0x0001 /* OK to return IN_INDEX_NOOP */ 4948 #define IN_INDEX_MEMBERSHIP 0x0002 /* IN operator used for membership test */ 4949 #define IN_INDEX_LOOP 0x0004 /* IN operator used as a loop */ 4950 int sqlite3FindInIndex(Parse *, Expr *, u32, int*, int*, int*); 4951 4952 int sqlite3JournalOpen(sqlite3_vfs *, const char *, sqlite3_file *, int, int); 4953 int sqlite3JournalSize(sqlite3_vfs *); 4954 #if defined(SQLITE_ENABLE_ATOMIC_WRITE) \ 4955 || defined(SQLITE_ENABLE_BATCH_ATOMIC_WRITE) 4956 int sqlite3JournalCreate(sqlite3_file *); 4957 #endif 4958 4959 int sqlite3JournalIsInMemory(sqlite3_file *p); 4960 void sqlite3MemJournalOpen(sqlite3_file *); 4961 4962 void sqlite3ExprSetHeightAndFlags(Parse *pParse, Expr *p); 4963 #if SQLITE_MAX_EXPR_DEPTH>0 4964 int sqlite3SelectExprHeight(Select *); 4965 int sqlite3ExprCheckHeight(Parse*, int); 4966 #else 4967 #define sqlite3SelectExprHeight(x) 0 4968 #define sqlite3ExprCheckHeight(x,y) 4969 #endif 4970 4971 u32 sqlite3Get4byte(const u8*); 4972 void sqlite3Put4byte(u8*, u32); 4973 4974 #ifdef SQLITE_ENABLE_UNLOCK_NOTIFY 4975 void sqlite3ConnectionBlocked(sqlite3 *, sqlite3 *); 4976 void sqlite3ConnectionUnlocked(sqlite3 *db); 4977 void sqlite3ConnectionClosed(sqlite3 *db); 4978 #else 4979 #define sqlite3ConnectionBlocked(x,y) 4980 #define sqlite3ConnectionUnlocked(x) 4981 #define sqlite3ConnectionClosed(x) 4982 #endif 4983 4984 #ifdef SQLITE_DEBUG 4985 void sqlite3ParserTrace(FILE*, char *); 4986 #endif 4987 #if defined(YYCOVERAGE) 4988 int sqlite3ParserCoverage(FILE*); 4989 #endif 4990 4991 /* 4992 ** If the SQLITE_ENABLE IOTRACE exists then the global variable 4993 ** sqlite3IoTrace is a pointer to a printf-like routine used to 4994 ** print I/O tracing messages. 4995 */ 4996 #ifdef SQLITE_ENABLE_IOTRACE 4997 # define IOTRACE(A) if( sqlite3IoTrace ){ sqlite3IoTrace A; } 4998 void sqlite3VdbeIOTraceSql(Vdbe*); 4999 SQLITE_API SQLITE_EXTERN void (SQLITE_CDECL *sqlite3IoTrace)(const char*,...); 5000 #else 5001 # define IOTRACE(A) 5002 # define sqlite3VdbeIOTraceSql(X) 5003 #endif 5004 5005 /* 5006 ** These routines are available for the mem2.c debugging memory allocator 5007 ** only. They are used to verify that different "types" of memory 5008 ** allocations are properly tracked by the system. 5009 ** 5010 ** sqlite3MemdebugSetType() sets the "type" of an allocation to one of 5011 ** the MEMTYPE_* macros defined below. The type must be a bitmask with 5012 ** a single bit set. 5013 ** 5014 ** sqlite3MemdebugHasType() returns true if any of the bits in its second 5015 ** argument match the type set by the previous sqlite3MemdebugSetType(). 5016 ** sqlite3MemdebugHasType() is intended for use inside assert() statements. 5017 ** 5018 ** sqlite3MemdebugNoType() returns true if none of the bits in its second 5019 ** argument match the type set by the previous sqlite3MemdebugSetType(). 5020 ** 5021 ** Perhaps the most important point is the difference between MEMTYPE_HEAP 5022 ** and MEMTYPE_LOOKASIDE. If an allocation is MEMTYPE_LOOKASIDE, that means 5023 ** it might have been allocated by lookaside, except the allocation was 5024 ** too large or lookaside was already full. It is important to verify 5025 ** that allocations that might have been satisfied by lookaside are not 5026 ** passed back to non-lookaside free() routines. Asserts such as the 5027 ** example above are placed on the non-lookaside free() routines to verify 5028 ** this constraint. 5029 ** 5030 ** All of this is no-op for a production build. It only comes into 5031 ** play when the SQLITE_MEMDEBUG compile-time option is used. 5032 */ 5033 #ifdef SQLITE_MEMDEBUG 5034 void sqlite3MemdebugSetType(void*,u8); 5035 int sqlite3MemdebugHasType(void*,u8); 5036 int sqlite3MemdebugNoType(void*,u8); 5037 #else 5038 # define sqlite3MemdebugSetType(X,Y) /* no-op */ 5039 # define sqlite3MemdebugHasType(X,Y) 1 5040 # define sqlite3MemdebugNoType(X,Y) 1 5041 #endif 5042 #define MEMTYPE_HEAP 0x01 /* General heap allocations */ 5043 #define MEMTYPE_LOOKASIDE 0x02 /* Heap that might have been lookaside */ 5044 #define MEMTYPE_PCACHE 0x04 /* Page cache allocations */ 5045 5046 /* 5047 ** Threading interface 5048 */ 5049 #if SQLITE_MAX_WORKER_THREADS>0 5050 int sqlite3ThreadCreate(SQLiteThread**,void*(*)(void*),void*); 5051 int sqlite3ThreadJoin(SQLiteThread*, void**); 5052 #endif 5053 5054 #if defined(SQLITE_ENABLE_DBPAGE_VTAB) || defined(SQLITE_TEST) 5055 int sqlite3DbpageRegister(sqlite3*); 5056 #endif 5057 #if defined(SQLITE_ENABLE_DBSTAT_VTAB) || defined(SQLITE_TEST) 5058 int sqlite3DbstatRegister(sqlite3*); 5059 #endif 5060 5061 int sqlite3ExprVectorSize(Expr *pExpr); 5062 int sqlite3ExprIsVector(Expr *pExpr); 5063 Expr *sqlite3VectorFieldSubexpr(Expr*, int); 5064 Expr *sqlite3ExprForVectorField(Parse*,Expr*,int); 5065 void sqlite3VectorErrorMsg(Parse*, Expr*); 5066 5067 #ifndef SQLITE_OMIT_COMPILEOPTION_DIAGS 5068 const char **sqlite3CompileOptions(int *pnOpt); 5069 #endif 5070 5071 #endif /* SQLITEINT_H */ 5072