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 /* Needed for various definitions... */ 123 #if defined(__GNUC__) && !defined(_GNU_SOURCE) 124 # define _GNU_SOURCE 125 #endif 126 127 #if defined(__OpenBSD__) && !defined(_BSD_SOURCE) 128 # define _BSD_SOURCE 129 #endif 130 131 /* 132 ** For MinGW, check to see if we can include the header file containing its 133 ** version information, among other things. Normally, this internal MinGW 134 ** header file would [only] be included automatically by other MinGW header 135 ** files; however, the contained version information is now required by this 136 ** header file to work around binary compatibility issues (see below) and 137 ** this is the only known way to reliably obtain it. This entire #if block 138 ** would be completely unnecessary if there was any other way of detecting 139 ** MinGW via their preprocessor (e.g. if they customized their GCC to define 140 ** some MinGW-specific macros). When compiling for MinGW, either the 141 ** _HAVE_MINGW_H or _HAVE__MINGW_H (note the extra underscore) macro must be 142 ** defined; otherwise, detection of conditions specific to MinGW will be 143 ** disabled. 144 */ 145 #if defined(_HAVE_MINGW_H) 146 # include "mingw.h" 147 #elif defined(_HAVE__MINGW_H) 148 # include "_mingw.h" 149 #endif 150 151 /* 152 ** For MinGW version 4.x (and higher), check to see if the _USE_32BIT_TIME_T 153 ** define is required to maintain binary compatibility with the MSVC runtime 154 ** library in use (e.g. for Windows XP). 155 */ 156 #if !defined(_USE_32BIT_TIME_T) && !defined(_USE_64BIT_TIME_T) && \ 157 defined(_WIN32) && !defined(_WIN64) && \ 158 defined(__MINGW_MAJOR_VERSION) && __MINGW_MAJOR_VERSION >= 4 && \ 159 defined(__MSVCRT__) 160 # define _USE_32BIT_TIME_T 161 #endif 162 163 /* The public SQLite interface. The _FILE_OFFSET_BITS macro must appear 164 ** first in QNX. Also, the _USE_32BIT_TIME_T macro must appear first for 165 ** MinGW. 166 */ 167 #include "sqlite3.h" 168 169 /* 170 ** Include the configuration header output by 'configure' if we're using the 171 ** autoconf-based build 172 */ 173 #if defined(_HAVE_SQLITE_CONFIG_H) && !defined(SQLITECONFIG_H) 174 #include "config.h" 175 #define SQLITECONFIG_H 1 176 #endif 177 178 #include "sqliteLimit.h" 179 180 /* Disable nuisance warnings on Borland compilers */ 181 #if defined(__BORLANDC__) 182 #pragma warn -rch /* unreachable code */ 183 #pragma warn -ccc /* Condition is always true or false */ 184 #pragma warn -aus /* Assigned value is never used */ 185 #pragma warn -csu /* Comparing signed and unsigned */ 186 #pragma warn -spa /* Suspicious pointer arithmetic */ 187 #endif 188 189 /* 190 ** Include standard header files as necessary 191 */ 192 #ifdef HAVE_STDINT_H 193 #include <stdint.h> 194 #endif 195 #ifdef HAVE_INTTYPES_H 196 #include <inttypes.h> 197 #endif 198 199 /* 200 ** The following macros are used to cast pointers to integers and 201 ** integers to pointers. The way you do this varies from one compiler 202 ** to the next, so we have developed the following set of #if statements 203 ** to generate appropriate macros for a wide range of compilers. 204 ** 205 ** The correct "ANSI" way to do this is to use the intptr_t type. 206 ** Unfortunately, that typedef is not available on all compilers, or 207 ** if it is available, it requires an #include of specific headers 208 ** that vary from one machine to the next. 209 ** 210 ** Ticket #3860: The llvm-gcc-4.2 compiler from Apple chokes on 211 ** the ((void*)&((char*)0)[X]) construct. But MSVC chokes on ((void*)(X)). 212 ** So we have to define the macros in different ways depending on the 213 ** compiler. 214 */ 215 #if defined(HAVE_STDINT_H) /* Use this case if we have ANSI headers */ 216 # define SQLITE_INT_TO_PTR(X) ((void*)(intptr_t)(X)) 217 # define SQLITE_PTR_TO_INT(X) ((int)(intptr_t)(X)) 218 #elif defined(__PTRDIFF_TYPE__) /* This case should work for GCC */ 219 # define SQLITE_INT_TO_PTR(X) ((void*)(__PTRDIFF_TYPE__)(X)) 220 # define SQLITE_PTR_TO_INT(X) ((int)(__PTRDIFF_TYPE__)(X)) 221 #elif !defined(__GNUC__) /* Works for compilers other than LLVM */ 222 # define SQLITE_INT_TO_PTR(X) ((void*)&((char*)0)[X]) 223 # define SQLITE_PTR_TO_INT(X) ((int)(((char*)X)-(char*)0)) 224 #else /* Generates a warning - but it always works */ 225 # define SQLITE_INT_TO_PTR(X) ((void*)(X)) 226 # define SQLITE_PTR_TO_INT(X) ((int)(X)) 227 #endif 228 229 /* 230 ** A macro to hint to the compiler that a function should not be 231 ** inlined. 232 */ 233 #if defined(__GNUC__) 234 # define SQLITE_NOINLINE __attribute__((noinline)) 235 #elif defined(_MSC_VER) && _MSC_VER>=1310 236 # define SQLITE_NOINLINE __declspec(noinline) 237 #else 238 # define SQLITE_NOINLINE 239 #endif 240 241 /* 242 ** Make sure that the compiler intrinsics we desire are enabled when 243 ** compiling with an appropriate version of MSVC unless prevented by 244 ** the SQLITE_DISABLE_INTRINSIC define. 245 */ 246 #if !defined(SQLITE_DISABLE_INTRINSIC) 247 # if defined(_MSC_VER) && _MSC_VER>=1400 248 # if !defined(_WIN32_WCE) 249 # include <intrin.h> 250 # pragma intrinsic(_byteswap_ushort) 251 # pragma intrinsic(_byteswap_ulong) 252 # pragma intrinsic(_byteswap_uint64) 253 # pragma intrinsic(_ReadWriteBarrier) 254 # else 255 # include <cmnintrin.h> 256 # endif 257 # endif 258 #endif 259 260 /* 261 ** The SQLITE_THREADSAFE macro must be defined as 0, 1, or 2. 262 ** 0 means mutexes are permanently disable and the library is never 263 ** threadsafe. 1 means the library is serialized which is the highest 264 ** level of threadsafety. 2 means the library is multithreaded - multiple 265 ** threads can use SQLite as long as no two threads try to use the same 266 ** database connection at the same time. 267 ** 268 ** Older versions of SQLite used an optional THREADSAFE macro. 269 ** We support that for legacy. 270 ** 271 ** To ensure that the correct value of "THREADSAFE" is reported when querying 272 ** for compile-time options at runtime (e.g. "PRAGMA compile_options"), this 273 ** logic is partially replicated in ctime.c. If it is updated here, it should 274 ** also be updated there. 275 */ 276 #if !defined(SQLITE_THREADSAFE) 277 # if defined(THREADSAFE) 278 # define SQLITE_THREADSAFE THREADSAFE 279 # else 280 # define SQLITE_THREADSAFE 1 /* IMP: R-07272-22309 */ 281 # endif 282 #endif 283 284 /* 285 ** Powersafe overwrite is on by default. But can be turned off using 286 ** the -DSQLITE_POWERSAFE_OVERWRITE=0 command-line option. 287 */ 288 #ifndef SQLITE_POWERSAFE_OVERWRITE 289 # define SQLITE_POWERSAFE_OVERWRITE 1 290 #endif 291 292 /* 293 ** EVIDENCE-OF: R-25715-37072 Memory allocation statistics are enabled by 294 ** default unless SQLite is compiled with SQLITE_DEFAULT_MEMSTATUS=0 in 295 ** which case memory allocation statistics are disabled by default. 296 */ 297 #if !defined(SQLITE_DEFAULT_MEMSTATUS) 298 # define SQLITE_DEFAULT_MEMSTATUS 1 299 #endif 300 301 /* 302 ** Exactly one of the following macros must be defined in order to 303 ** specify which memory allocation subsystem to use. 304 ** 305 ** SQLITE_SYSTEM_MALLOC // Use normal system malloc() 306 ** SQLITE_WIN32_MALLOC // Use Win32 native heap API 307 ** SQLITE_ZERO_MALLOC // Use a stub allocator that always fails 308 ** SQLITE_MEMDEBUG // Debugging version of system malloc() 309 ** 310 ** On Windows, if the SQLITE_WIN32_MALLOC_VALIDATE macro is defined and the 311 ** assert() macro is enabled, each call into the Win32 native heap subsystem 312 ** will cause HeapValidate to be called. If heap validation should fail, an 313 ** assertion will be triggered. 314 ** 315 ** If none of the above are defined, then set SQLITE_SYSTEM_MALLOC as 316 ** the default. 317 */ 318 #if defined(SQLITE_SYSTEM_MALLOC) \ 319 + defined(SQLITE_WIN32_MALLOC) \ 320 + defined(SQLITE_ZERO_MALLOC) \ 321 + defined(SQLITE_MEMDEBUG)>1 322 # error "Two or more of the following compile-time configuration options\ 323 are defined but at most one is allowed:\ 324 SQLITE_SYSTEM_MALLOC, SQLITE_WIN32_MALLOC, SQLITE_MEMDEBUG,\ 325 SQLITE_ZERO_MALLOC" 326 #endif 327 #if defined(SQLITE_SYSTEM_MALLOC) \ 328 + defined(SQLITE_WIN32_MALLOC) \ 329 + defined(SQLITE_ZERO_MALLOC) \ 330 + defined(SQLITE_MEMDEBUG)==0 331 # define SQLITE_SYSTEM_MALLOC 1 332 #endif 333 334 /* 335 ** If SQLITE_MALLOC_SOFT_LIMIT is not zero, then try to keep the 336 ** sizes of memory allocations below this value where possible. 337 */ 338 #if !defined(SQLITE_MALLOC_SOFT_LIMIT) 339 # define SQLITE_MALLOC_SOFT_LIMIT 1024 340 #endif 341 342 /* 343 ** We need to define _XOPEN_SOURCE as follows in order to enable 344 ** recursive mutexes on most Unix systems and fchmod() on OpenBSD. 345 ** But _XOPEN_SOURCE define causes problems for Mac OS X, so omit 346 ** it. 347 */ 348 #if !defined(_XOPEN_SOURCE) && !defined(__DARWIN__) && !defined(__APPLE__) 349 # define _XOPEN_SOURCE 600 350 #endif 351 352 /* 353 ** NDEBUG and SQLITE_DEBUG are opposites. It should always be true that 354 ** defined(NDEBUG)==!defined(SQLITE_DEBUG). If this is not currently true, 355 ** make it true by defining or undefining NDEBUG. 356 ** 357 ** Setting NDEBUG makes the code smaller and faster by disabling the 358 ** assert() statements in the code. So we want the default action 359 ** to be for NDEBUG to be set and NDEBUG to be undefined only if SQLITE_DEBUG 360 ** is set. Thus NDEBUG becomes an opt-in rather than an opt-out 361 ** feature. 362 */ 363 #if !defined(NDEBUG) && !defined(SQLITE_DEBUG) 364 # define NDEBUG 1 365 #endif 366 #if defined(NDEBUG) && defined(SQLITE_DEBUG) 367 # undef NDEBUG 368 #endif 369 370 /* 371 ** Enable SQLITE_ENABLE_EXPLAIN_COMMENTS if SQLITE_DEBUG is turned on. 372 */ 373 #if !defined(SQLITE_ENABLE_EXPLAIN_COMMENTS) && defined(SQLITE_DEBUG) 374 # define SQLITE_ENABLE_EXPLAIN_COMMENTS 1 375 #endif 376 377 /* 378 ** The testcase() macro is used to aid in coverage testing. When 379 ** doing coverage testing, the condition inside the argument to 380 ** testcase() must be evaluated both true and false in order to 381 ** get full branch coverage. The testcase() macro is inserted 382 ** to help ensure adequate test coverage in places where simple 383 ** condition/decision coverage is inadequate. For example, testcase() 384 ** can be used to make sure boundary values are tested. For 385 ** bitmask tests, testcase() can be used to make sure each bit 386 ** is significant and used at least once. On switch statements 387 ** where multiple cases go to the same block of code, testcase() 388 ** can insure that all cases are evaluated. 389 ** 390 */ 391 #ifdef SQLITE_COVERAGE_TEST 392 void sqlite3Coverage(int); 393 # define testcase(X) if( X ){ sqlite3Coverage(__LINE__); } 394 #else 395 # define testcase(X) 396 #endif 397 398 /* 399 ** The TESTONLY macro is used to enclose variable declarations or 400 ** other bits of code that are needed to support the arguments 401 ** within testcase() and assert() macros. 402 */ 403 #if !defined(NDEBUG) || defined(SQLITE_COVERAGE_TEST) 404 # define TESTONLY(X) X 405 #else 406 # define TESTONLY(X) 407 #endif 408 409 /* 410 ** Sometimes we need a small amount of code such as a variable initialization 411 ** to setup for a later assert() statement. We do not want this code to 412 ** appear when assert() is disabled. The following macro is therefore 413 ** used to contain that setup code. The "VVA" acronym stands for 414 ** "Verification, Validation, and Accreditation". In other words, the 415 ** code within VVA_ONLY() will only run during verification processes. 416 */ 417 #ifndef NDEBUG 418 # define VVA_ONLY(X) X 419 #else 420 # define VVA_ONLY(X) 421 #endif 422 423 /* 424 ** The ALWAYS and NEVER macros surround boolean expressions which 425 ** are intended to always be true or false, respectively. Such 426 ** expressions could be omitted from the code completely. But they 427 ** are included in a few cases in order to enhance the resilience 428 ** of SQLite to unexpected behavior - to make the code "self-healing" 429 ** or "ductile" rather than being "brittle" and crashing at the first 430 ** hint of unplanned behavior. 431 ** 432 ** In other words, ALWAYS and NEVER are added for defensive code. 433 ** 434 ** When doing coverage testing ALWAYS and NEVER are hard-coded to 435 ** be true and false so that the unreachable code they specify will 436 ** not be counted as untested code. 437 */ 438 #if defined(SQLITE_COVERAGE_TEST) || defined(SQLITE_MUTATION_TEST) 439 # define ALWAYS(X) (1) 440 # define NEVER(X) (0) 441 #elif !defined(NDEBUG) 442 # define ALWAYS(X) ((X)?1:(assert(0),0)) 443 # define NEVER(X) ((X)?(assert(0),1):0) 444 #else 445 # define ALWAYS(X) (X) 446 # define NEVER(X) (X) 447 #endif 448 449 /* 450 ** The harmless(X) macro indicates that expression X is usually false 451 ** but can be true without causing any problems, but we don't know of 452 ** any way to cause X to be true. 453 ** 454 ** In debugging and testing builds, this macro will abort if X is ever 455 ** true. In this way, developers are alerted to a possible test case 456 ** that causes X to be true. If a harmless macro ever fails, that is 457 ** an opportunity to change the macro into a testcase() and add a new 458 ** test case to the test suite. 459 ** 460 ** For normal production builds, harmless(X) is a no-op, since it does 461 ** not matter whether expression X is true or false. 462 */ 463 #ifdef SQLITE_DEBUG 464 # define harmless(X) assert(!(X)); 465 #else 466 # define harmless(X) 467 #endif 468 469 /* 470 ** Some conditionals are optimizations only. In other words, if the 471 ** conditionals are replaced with a constant 1 (true) or 0 (false) then 472 ** the correct answer is still obtained, though perhaps not as quickly. 473 ** 474 ** The following macros mark these optimizations conditionals. 475 */ 476 #if defined(SQLITE_MUTATION_TEST) 477 # define OK_IF_ALWAYS_TRUE(X) (1) 478 # define OK_IF_ALWAYS_FALSE(X) (0) 479 #else 480 # define OK_IF_ALWAYS_TRUE(X) (X) 481 # define OK_IF_ALWAYS_FALSE(X) (X) 482 #endif 483 484 /* 485 ** Some malloc failures are only possible if SQLITE_TEST_REALLOC_STRESS is 486 ** defined. We need to defend against those failures when testing with 487 ** SQLITE_TEST_REALLOC_STRESS, but we don't want the unreachable branches 488 ** during a normal build. The following macro can be used to disable tests 489 ** that are always false except when SQLITE_TEST_REALLOC_STRESS is set. 490 */ 491 #if defined(SQLITE_TEST_REALLOC_STRESS) 492 # define ONLY_IF_REALLOC_STRESS(X) (X) 493 #elif !defined(NDEBUG) 494 # define ONLY_IF_REALLOC_STRESS(X) ((X)?(assert(0),1):0) 495 #else 496 # define ONLY_IF_REALLOC_STRESS(X) (0) 497 #endif 498 499 /* 500 ** Declarations used for tracing the operating system interfaces. 501 */ 502 #if defined(SQLITE_FORCE_OS_TRACE) || defined(SQLITE_TEST) || \ 503 (defined(SQLITE_DEBUG) && SQLITE_OS_WIN) 504 extern int sqlite3OSTrace; 505 # define OSTRACE(X) if( sqlite3OSTrace ) sqlite3DebugPrintf X 506 # define SQLITE_HAVE_OS_TRACE 507 #else 508 # define OSTRACE(X) 509 # undef SQLITE_HAVE_OS_TRACE 510 #endif 511 512 /* 513 ** Is the sqlite3ErrName() function needed in the build? Currently, 514 ** it is needed by "mutex_w32.c" (when debugging), "os_win.c" (when 515 ** OSTRACE is enabled), and by several "test*.c" files (which are 516 ** compiled using SQLITE_TEST). 517 */ 518 #if defined(SQLITE_HAVE_OS_TRACE) || defined(SQLITE_TEST) || \ 519 (defined(SQLITE_DEBUG) && SQLITE_OS_WIN) 520 # define SQLITE_NEED_ERR_NAME 521 #else 522 # undef SQLITE_NEED_ERR_NAME 523 #endif 524 525 /* 526 ** SQLITE_ENABLE_EXPLAIN_COMMENTS is incompatible with SQLITE_OMIT_EXPLAIN 527 */ 528 #ifdef SQLITE_OMIT_EXPLAIN 529 # undef SQLITE_ENABLE_EXPLAIN_COMMENTS 530 #endif 531 532 /* 533 ** Return true (non-zero) if the input is an integer that is too large 534 ** to fit in 32-bits. This macro is used inside of various testcase() 535 ** macros to verify that we have tested SQLite for large-file support. 536 */ 537 #define IS_BIG_INT(X) (((X)&~(i64)0xffffffff)!=0) 538 539 /* 540 ** The macro unlikely() is a hint that surrounds a boolean 541 ** expression that is usually false. Macro likely() surrounds 542 ** a boolean expression that is usually true. These hints could, 543 ** in theory, be used by the compiler to generate better code, but 544 ** currently they are just comments for human readers. 545 */ 546 #define likely(X) (X) 547 #define unlikely(X) (X) 548 549 #include "hash.h" 550 #include "parse.h" 551 #include <stdio.h> 552 #include <stdlib.h> 553 #include <string.h> 554 #include <assert.h> 555 #include <stddef.h> 556 557 /* 558 ** Use a macro to replace memcpy() if compiled with SQLITE_INLINE_MEMCPY. 559 ** This allows better measurements of where memcpy() is used when running 560 ** cachegrind. But this macro version of memcpy() is very slow so it 561 ** should not be used in production. This is a performance measurement 562 ** hack only. 563 */ 564 #ifdef SQLITE_INLINE_MEMCPY 565 # define memcpy(D,S,N) {char*xxd=(char*)(D);const char*xxs=(const char*)(S);\ 566 int xxn=(N);while(xxn-->0)*(xxd++)=*(xxs++);} 567 #endif 568 569 /* 570 ** If compiling for a processor that lacks floating point support, 571 ** substitute integer for floating-point 572 */ 573 #ifdef SQLITE_OMIT_FLOATING_POINT 574 # define double sqlite_int64 575 # define float sqlite_int64 576 # define LONGDOUBLE_TYPE sqlite_int64 577 # ifndef SQLITE_BIG_DBL 578 # define SQLITE_BIG_DBL (((sqlite3_int64)1)<<50) 579 # endif 580 # define SQLITE_OMIT_DATETIME_FUNCS 1 581 # define SQLITE_OMIT_TRACE 1 582 # undef SQLITE_MIXED_ENDIAN_64BIT_FLOAT 583 # undef SQLITE_HAVE_ISNAN 584 #endif 585 #ifndef SQLITE_BIG_DBL 586 # define SQLITE_BIG_DBL (1e99) 587 #endif 588 589 /* 590 ** OMIT_TEMPDB is set to 1 if SQLITE_OMIT_TEMPDB is defined, or 0 591 ** afterward. Having this macro allows us to cause the C compiler 592 ** to omit code used by TEMP tables without messy #ifndef statements. 593 */ 594 #ifdef SQLITE_OMIT_TEMPDB 595 #define OMIT_TEMPDB 1 596 #else 597 #define OMIT_TEMPDB 0 598 #endif 599 600 /* 601 ** The "file format" number is an integer that is incremented whenever 602 ** the VDBE-level file format changes. The following macros define the 603 ** the default file format for new databases and the maximum file format 604 ** that the library can read. 605 */ 606 #define SQLITE_MAX_FILE_FORMAT 4 607 #ifndef SQLITE_DEFAULT_FILE_FORMAT 608 # define SQLITE_DEFAULT_FILE_FORMAT 4 609 #endif 610 611 /* 612 ** Determine whether triggers are recursive by default. This can be 613 ** changed at run-time using a pragma. 614 */ 615 #ifndef SQLITE_DEFAULT_RECURSIVE_TRIGGERS 616 # define SQLITE_DEFAULT_RECURSIVE_TRIGGERS 0 617 #endif 618 619 /* 620 ** Provide a default value for SQLITE_TEMP_STORE in case it is not specified 621 ** on the command-line 622 */ 623 #ifndef SQLITE_TEMP_STORE 624 # define SQLITE_TEMP_STORE 1 625 #endif 626 627 /* 628 ** If no value has been provided for SQLITE_MAX_WORKER_THREADS, or if 629 ** SQLITE_TEMP_STORE is set to 3 (never use temporary files), set it 630 ** to zero. 631 */ 632 #if SQLITE_TEMP_STORE==3 || SQLITE_THREADSAFE==0 633 # undef SQLITE_MAX_WORKER_THREADS 634 # define SQLITE_MAX_WORKER_THREADS 0 635 #endif 636 #ifndef SQLITE_MAX_WORKER_THREADS 637 # define SQLITE_MAX_WORKER_THREADS 8 638 #endif 639 #ifndef SQLITE_DEFAULT_WORKER_THREADS 640 # define SQLITE_DEFAULT_WORKER_THREADS 0 641 #endif 642 #if SQLITE_DEFAULT_WORKER_THREADS>SQLITE_MAX_WORKER_THREADS 643 # undef SQLITE_MAX_WORKER_THREADS 644 # define SQLITE_MAX_WORKER_THREADS SQLITE_DEFAULT_WORKER_THREADS 645 #endif 646 647 /* 648 ** The default initial allocation for the pagecache when using separate 649 ** pagecaches for each database connection. A positive number is the 650 ** number of pages. A negative number N translations means that a buffer 651 ** of -1024*N bytes is allocated and used for as many pages as it will hold. 652 ** 653 ** The default value of "20" was choosen to minimize the run-time of the 654 ** speedtest1 test program with options: --shrink-memory --reprepare 655 */ 656 #ifndef SQLITE_DEFAULT_PCACHE_INITSZ 657 # define SQLITE_DEFAULT_PCACHE_INITSZ 20 658 #endif 659 660 /* 661 ** Default value for the SQLITE_CONFIG_SORTERREF_SIZE option. 662 */ 663 #ifndef SQLITE_DEFAULT_SORTERREF_SIZE 664 # define SQLITE_DEFAULT_SORTERREF_SIZE 0x7fffffff 665 #endif 666 667 /* 668 ** The compile-time options SQLITE_MMAP_READWRITE and 669 ** SQLITE_ENABLE_BATCH_ATOMIC_WRITE are not compatible with one another. 670 ** You must choose one or the other (or neither) but not both. 671 */ 672 #if defined(SQLITE_MMAP_READWRITE) && defined(SQLITE_ENABLE_BATCH_ATOMIC_WRITE) 673 #error Cannot use both SQLITE_MMAP_READWRITE and SQLITE_ENABLE_BATCH_ATOMIC_WRITE 674 #endif 675 676 /* 677 ** GCC does not define the offsetof() macro so we'll have to do it 678 ** ourselves. 679 */ 680 #ifndef offsetof 681 #define offsetof(STRUCTURE,FIELD) ((int)((char*)&((STRUCTURE*)0)->FIELD)) 682 #endif 683 684 /* 685 ** Macros to compute minimum and maximum of two numbers. 686 */ 687 #ifndef MIN 688 # define MIN(A,B) ((A)<(B)?(A):(B)) 689 #endif 690 #ifndef MAX 691 # define MAX(A,B) ((A)>(B)?(A):(B)) 692 #endif 693 694 /* 695 ** Swap two objects of type TYPE. 696 */ 697 #define SWAP(TYPE,A,B) {TYPE t=A; A=B; B=t;} 698 699 /* 700 ** Check to see if this machine uses EBCDIC. (Yes, believe it or 701 ** not, there are still machines out there that use EBCDIC.) 702 */ 703 #if 'A' == '\301' 704 # define SQLITE_EBCDIC 1 705 #else 706 # define SQLITE_ASCII 1 707 #endif 708 709 /* 710 ** Integers of known sizes. These typedefs might change for architectures 711 ** where the sizes very. Preprocessor macros are available so that the 712 ** types can be conveniently redefined at compile-type. Like this: 713 ** 714 ** cc '-DUINTPTR_TYPE=long long int' ... 715 */ 716 #ifndef UINT32_TYPE 717 # ifdef HAVE_UINT32_T 718 # define UINT32_TYPE uint32_t 719 # else 720 # define UINT32_TYPE unsigned int 721 # endif 722 #endif 723 #ifndef UINT16_TYPE 724 # ifdef HAVE_UINT16_T 725 # define UINT16_TYPE uint16_t 726 # else 727 # define UINT16_TYPE unsigned short int 728 # endif 729 #endif 730 #ifndef INT16_TYPE 731 # ifdef HAVE_INT16_T 732 # define INT16_TYPE int16_t 733 # else 734 # define INT16_TYPE short int 735 # endif 736 #endif 737 #ifndef UINT8_TYPE 738 # ifdef HAVE_UINT8_T 739 # define UINT8_TYPE uint8_t 740 # else 741 # define UINT8_TYPE unsigned char 742 # endif 743 #endif 744 #ifndef INT8_TYPE 745 # ifdef HAVE_INT8_T 746 # define INT8_TYPE int8_t 747 # else 748 # define INT8_TYPE signed char 749 # endif 750 #endif 751 #ifndef LONGDOUBLE_TYPE 752 # define LONGDOUBLE_TYPE long double 753 #endif 754 typedef sqlite_int64 i64; /* 8-byte signed integer */ 755 typedef sqlite_uint64 u64; /* 8-byte unsigned integer */ 756 typedef UINT32_TYPE u32; /* 4-byte unsigned integer */ 757 typedef UINT16_TYPE u16; /* 2-byte unsigned integer */ 758 typedef INT16_TYPE i16; /* 2-byte signed integer */ 759 typedef UINT8_TYPE u8; /* 1-byte unsigned integer */ 760 typedef INT8_TYPE i8; /* 1-byte signed integer */ 761 762 /* 763 ** SQLITE_MAX_U32 is a u64 constant that is the maximum u64 value 764 ** that can be stored in a u32 without loss of data. The value 765 ** is 0x00000000ffffffff. But because of quirks of some compilers, we 766 ** have to specify the value in the less intuitive manner shown: 767 */ 768 #define SQLITE_MAX_U32 ((((u64)1)<<32)-1) 769 770 /* 771 ** The datatype used to store estimates of the number of rows in a 772 ** table or index. This is an unsigned integer type. For 99.9% of 773 ** the world, a 32-bit integer is sufficient. But a 64-bit integer 774 ** can be used at compile-time if desired. 775 */ 776 #ifdef SQLITE_64BIT_STATS 777 typedef u64 tRowcnt; /* 64-bit only if requested at compile-time */ 778 #else 779 typedef u32 tRowcnt; /* 32-bit is the default */ 780 #endif 781 782 /* 783 ** Estimated quantities used for query planning are stored as 16-bit 784 ** logarithms. For quantity X, the value stored is 10*log2(X). This 785 ** gives a possible range of values of approximately 1.0e986 to 1e-986. 786 ** But the allowed values are "grainy". Not every value is representable. 787 ** For example, quantities 16 and 17 are both represented by a LogEst 788 ** of 40. However, since LogEst quantities are suppose to be estimates, 789 ** not exact values, this imprecision is not a problem. 790 ** 791 ** "LogEst" is short for "Logarithmic Estimate". 792 ** 793 ** Examples: 794 ** 1 -> 0 20 -> 43 10000 -> 132 795 ** 2 -> 10 25 -> 46 25000 -> 146 796 ** 3 -> 16 100 -> 66 1000000 -> 199 797 ** 4 -> 20 1000 -> 99 1048576 -> 200 798 ** 10 -> 33 1024 -> 100 4294967296 -> 320 799 ** 800 ** The LogEst can be negative to indicate fractional values. 801 ** Examples: 802 ** 803 ** 0.5 -> -10 0.1 -> -33 0.0625 -> -40 804 */ 805 typedef INT16_TYPE LogEst; 806 807 /* 808 ** Set the SQLITE_PTRSIZE macro to the number of bytes in a pointer 809 */ 810 #ifndef SQLITE_PTRSIZE 811 # if defined(__SIZEOF_POINTER__) 812 # define SQLITE_PTRSIZE __SIZEOF_POINTER__ 813 # elif defined(i386) || defined(__i386__) || defined(_M_IX86) || \ 814 defined(_M_ARM) || defined(__arm__) || defined(__x86) || \ 815 (defined(__TOS_AIX__) && !defined(__64BIT__)) 816 # define SQLITE_PTRSIZE 4 817 # else 818 # define SQLITE_PTRSIZE 8 819 # endif 820 #endif 821 822 /* The uptr type is an unsigned integer large enough to hold a pointer 823 */ 824 #if defined(HAVE_STDINT_H) 825 typedef uintptr_t uptr; 826 #elif SQLITE_PTRSIZE==4 827 typedef u32 uptr; 828 #else 829 typedef u64 uptr; 830 #endif 831 832 /* 833 ** The SQLITE_WITHIN(P,S,E) macro checks to see if pointer P points to 834 ** something between S (inclusive) and E (exclusive). 835 ** 836 ** In other words, S is a buffer and E is a pointer to the first byte after 837 ** the end of buffer S. This macro returns true if P points to something 838 ** contained within the buffer S. 839 */ 840 #define SQLITE_WITHIN(P,S,E) (((uptr)(P)>=(uptr)(S))&&((uptr)(P)<(uptr)(E))) 841 842 843 /* 844 ** Macros to determine whether the machine is big or little endian, 845 ** and whether or not that determination is run-time or compile-time. 846 ** 847 ** For best performance, an attempt is made to guess at the byte-order 848 ** using C-preprocessor macros. If that is unsuccessful, or if 849 ** -DSQLITE_BYTEORDER=0 is set, then byte-order is determined 850 ** at run-time. 851 */ 852 #ifndef SQLITE_BYTEORDER 853 # if defined(i386) || defined(__i386__) || defined(_M_IX86) || \ 854 defined(__x86_64) || defined(__x86_64__) || defined(_M_X64) || \ 855 defined(_M_AMD64) || defined(_M_ARM) || defined(__x86) || \ 856 defined(__ARMEL__) || defined(__AARCH64EL__) || defined(_M_ARM64) 857 # define SQLITE_BYTEORDER 1234 858 # elif defined(sparc) || defined(__ppc__) || \ 859 defined(__ARMEB__) || defined(__AARCH64EB__) 860 # define SQLITE_BYTEORDER 4321 861 # else 862 # define SQLITE_BYTEORDER 0 863 # endif 864 #endif 865 #if SQLITE_BYTEORDER==4321 866 # define SQLITE_BIGENDIAN 1 867 # define SQLITE_LITTLEENDIAN 0 868 # define SQLITE_UTF16NATIVE SQLITE_UTF16BE 869 #elif SQLITE_BYTEORDER==1234 870 # define SQLITE_BIGENDIAN 0 871 # define SQLITE_LITTLEENDIAN 1 872 # define SQLITE_UTF16NATIVE SQLITE_UTF16LE 873 #else 874 # ifdef SQLITE_AMALGAMATION 875 const int sqlite3one = 1; 876 # else 877 extern const int sqlite3one; 878 # endif 879 # define SQLITE_BIGENDIAN (*(char *)(&sqlite3one)==0) 880 # define SQLITE_LITTLEENDIAN (*(char *)(&sqlite3one)==1) 881 # define SQLITE_UTF16NATIVE (SQLITE_BIGENDIAN?SQLITE_UTF16BE:SQLITE_UTF16LE) 882 #endif 883 884 /* 885 ** Constants for the largest and smallest possible 64-bit signed integers. 886 ** These macros are designed to work correctly on both 32-bit and 64-bit 887 ** compilers. 888 */ 889 #define LARGEST_INT64 (0xffffffff|(((i64)0x7fffffff)<<32)) 890 #define SMALLEST_INT64 (((i64)-1) - LARGEST_INT64) 891 892 /* 893 ** Round up a number to the next larger multiple of 8. This is used 894 ** to force 8-byte alignment on 64-bit architectures. 895 */ 896 #define ROUND8(x) (((x)+7)&~7) 897 898 /* 899 ** Round down to the nearest multiple of 8 900 */ 901 #define ROUNDDOWN8(x) ((x)&~7) 902 903 /* 904 ** Assert that the pointer X is aligned to an 8-byte boundary. This 905 ** macro is used only within assert() to verify that the code gets 906 ** all alignment restrictions correct. 907 ** 908 ** Except, if SQLITE_4_BYTE_ALIGNED_MALLOC is defined, then the 909 ** underlying malloc() implementation might return us 4-byte aligned 910 ** pointers. In that case, only verify 4-byte alignment. 911 */ 912 #ifdef SQLITE_4_BYTE_ALIGNED_MALLOC 913 # define EIGHT_BYTE_ALIGNMENT(X) ((((char*)(X) - (char*)0)&3)==0) 914 #else 915 # define EIGHT_BYTE_ALIGNMENT(X) ((((char*)(X) - (char*)0)&7)==0) 916 #endif 917 918 /* 919 ** Disable MMAP on platforms where it is known to not work 920 */ 921 #if defined(__OpenBSD__) || defined(__QNXNTO__) 922 # undef SQLITE_MAX_MMAP_SIZE 923 # define SQLITE_MAX_MMAP_SIZE 0 924 #endif 925 926 /* 927 ** Default maximum size of memory used by memory-mapped I/O in the VFS 928 */ 929 #ifdef __APPLE__ 930 # include <TargetConditionals.h> 931 #endif 932 #ifndef SQLITE_MAX_MMAP_SIZE 933 # if defined(__linux__) \ 934 || defined(_WIN32) \ 935 || (defined(__APPLE__) && defined(__MACH__)) \ 936 || defined(__sun) \ 937 || defined(__FreeBSD__) \ 938 || defined(__DragonFly__) 939 # define SQLITE_MAX_MMAP_SIZE 0x7fff0000 /* 2147418112 */ 940 # else 941 # define SQLITE_MAX_MMAP_SIZE 0 942 # endif 943 #endif 944 945 /* 946 ** The default MMAP_SIZE is zero on all platforms. Or, even if a larger 947 ** default MMAP_SIZE is specified at compile-time, make sure that it does 948 ** not exceed the maximum mmap size. 949 */ 950 #ifndef SQLITE_DEFAULT_MMAP_SIZE 951 # define SQLITE_DEFAULT_MMAP_SIZE 0 952 #endif 953 #if SQLITE_DEFAULT_MMAP_SIZE>SQLITE_MAX_MMAP_SIZE 954 # undef SQLITE_DEFAULT_MMAP_SIZE 955 # define SQLITE_DEFAULT_MMAP_SIZE SQLITE_MAX_MMAP_SIZE 956 #endif 957 958 /* 959 ** SELECTTRACE_ENABLED will be either 1 or 0 depending on whether or not 960 ** the Select query generator tracing logic is turned on. 961 */ 962 #if defined(SQLITE_ENABLE_SELECTTRACE) 963 # define SELECTTRACE_ENABLED 1 964 #else 965 # define SELECTTRACE_ENABLED 0 966 #endif 967 968 /* 969 ** An instance of the following structure is used to store the busy-handler 970 ** callback for a given sqlite handle. 971 ** 972 ** The sqlite.busyHandler member of the sqlite struct contains the busy 973 ** callback for the database handle. Each pager opened via the sqlite 974 ** handle is passed a pointer to sqlite.busyHandler. The busy-handler 975 ** callback is currently invoked only from within pager.c. 976 */ 977 typedef struct BusyHandler BusyHandler; 978 struct BusyHandler { 979 int (*xBusyHandler)(void *,int); /* The busy callback */ 980 void *pBusyArg; /* First arg to busy callback */ 981 int nBusy; /* Incremented with each busy call */ 982 u8 bExtraFileArg; /* Include sqlite3_file as callback arg */ 983 }; 984 985 /* 986 ** Name of the master database table. The master database table 987 ** is a special table that holds the names and attributes of all 988 ** user tables and indices. 989 */ 990 #define MASTER_NAME "sqlite_master" 991 #define TEMP_MASTER_NAME "sqlite_temp_master" 992 993 /* 994 ** The root-page of the master database table. 995 */ 996 #define MASTER_ROOT 1 997 998 /* 999 ** The name of the schema table. 1000 */ 1001 #define SCHEMA_TABLE(x) ((!OMIT_TEMPDB)&&(x==1)?TEMP_MASTER_NAME:MASTER_NAME) 1002 1003 /* 1004 ** A convenience macro that returns the number of elements in 1005 ** an array. 1006 */ 1007 #define ArraySize(X) ((int)(sizeof(X)/sizeof(X[0]))) 1008 1009 /* 1010 ** Determine if the argument is a power of two 1011 */ 1012 #define IsPowerOfTwo(X) (((X)&((X)-1))==0) 1013 1014 /* 1015 ** The following value as a destructor means to use sqlite3DbFree(). 1016 ** The sqlite3DbFree() routine requires two parameters instead of the 1017 ** one parameter that destructors normally want. So we have to introduce 1018 ** this magic value that the code knows to handle differently. Any 1019 ** pointer will work here as long as it is distinct from SQLITE_STATIC 1020 ** and SQLITE_TRANSIENT. 1021 */ 1022 #define SQLITE_DYNAMIC ((sqlite3_destructor_type)sqlite3MallocSize) 1023 1024 /* 1025 ** When SQLITE_OMIT_WSD is defined, it means that the target platform does 1026 ** not support Writable Static Data (WSD) such as global and static variables. 1027 ** All variables must either be on the stack or dynamically allocated from 1028 ** the heap. When WSD is unsupported, the variable declarations scattered 1029 ** throughout the SQLite code must become constants instead. The SQLITE_WSD 1030 ** macro is used for this purpose. And instead of referencing the variable 1031 ** directly, we use its constant as a key to lookup the run-time allocated 1032 ** buffer that holds real variable. The constant is also the initializer 1033 ** for the run-time allocated buffer. 1034 ** 1035 ** In the usual case where WSD is supported, the SQLITE_WSD and GLOBAL 1036 ** macros become no-ops and have zero performance impact. 1037 */ 1038 #ifdef SQLITE_OMIT_WSD 1039 #define SQLITE_WSD const 1040 #define GLOBAL(t,v) (*(t*)sqlite3_wsd_find((void*)&(v), sizeof(v))) 1041 #define sqlite3GlobalConfig GLOBAL(struct Sqlite3Config, sqlite3Config) 1042 int sqlite3_wsd_init(int N, int J); 1043 void *sqlite3_wsd_find(void *K, int L); 1044 #else 1045 #define SQLITE_WSD 1046 #define GLOBAL(t,v) v 1047 #define sqlite3GlobalConfig sqlite3Config 1048 #endif 1049 1050 /* 1051 ** The following macros are used to suppress compiler warnings and to 1052 ** make it clear to human readers when a function parameter is deliberately 1053 ** left unused within the body of a function. This usually happens when 1054 ** a function is called via a function pointer. For example the 1055 ** implementation of an SQL aggregate step callback may not use the 1056 ** parameter indicating the number of arguments passed to the aggregate, 1057 ** if it knows that this is enforced elsewhere. 1058 ** 1059 ** When a function parameter is not used at all within the body of a function, 1060 ** it is generally named "NotUsed" or "NotUsed2" to make things even clearer. 1061 ** However, these macros may also be used to suppress warnings related to 1062 ** parameters that may or may not be used depending on compilation options. 1063 ** For example those parameters only used in assert() statements. In these 1064 ** cases the parameters are named as per the usual conventions. 1065 */ 1066 #define UNUSED_PARAMETER(x) (void)(x) 1067 #define UNUSED_PARAMETER2(x,y) UNUSED_PARAMETER(x),UNUSED_PARAMETER(y) 1068 1069 /* 1070 ** Forward references to structures 1071 */ 1072 typedef struct AggInfo AggInfo; 1073 typedef struct AuthContext AuthContext; 1074 typedef struct AutoincInfo AutoincInfo; 1075 typedef struct Bitvec Bitvec; 1076 typedef struct CollSeq CollSeq; 1077 typedef struct Column Column; 1078 typedef struct Db Db; 1079 typedef struct Schema Schema; 1080 typedef struct Expr Expr; 1081 typedef struct ExprList ExprList; 1082 typedef struct FKey FKey; 1083 typedef struct FuncDestructor FuncDestructor; 1084 typedef struct FuncDef FuncDef; 1085 typedef struct FuncDefHash FuncDefHash; 1086 typedef struct IdList IdList; 1087 typedef struct Index Index; 1088 typedef struct IndexSample IndexSample; 1089 typedef struct KeyClass KeyClass; 1090 typedef struct KeyInfo KeyInfo; 1091 typedef struct Lookaside Lookaside; 1092 typedef struct LookasideSlot LookasideSlot; 1093 typedef struct Module Module; 1094 typedef struct NameContext NameContext; 1095 typedef struct Parse Parse; 1096 typedef struct PreUpdate PreUpdate; 1097 typedef struct PrintfArguments PrintfArguments; 1098 typedef struct RenameToken RenameToken; 1099 typedef struct RowSet RowSet; 1100 typedef struct Savepoint Savepoint; 1101 typedef struct Select Select; 1102 typedef struct SQLiteThread SQLiteThread; 1103 typedef struct SelectDest SelectDest; 1104 typedef struct SrcList SrcList; 1105 typedef struct sqlite3_str StrAccum; /* Internal alias for sqlite3_str */ 1106 typedef struct Table Table; 1107 typedef struct TableLock TableLock; 1108 typedef struct Token Token; 1109 typedef struct TreeView TreeView; 1110 typedef struct Trigger Trigger; 1111 typedef struct TriggerPrg TriggerPrg; 1112 typedef struct TriggerStep TriggerStep; 1113 typedef struct UnpackedRecord UnpackedRecord; 1114 typedef struct Upsert Upsert; 1115 typedef struct VTable VTable; 1116 typedef struct VtabCtx VtabCtx; 1117 typedef struct Walker Walker; 1118 typedef struct WhereInfo WhereInfo; 1119 typedef struct Window Window; 1120 typedef struct With With; 1121 1122 1123 /* 1124 ** The bitmask datatype defined below is used for various optimizations. 1125 ** 1126 ** Changing this from a 64-bit to a 32-bit type limits the number of 1127 ** tables in a join to 32 instead of 64. But it also reduces the size 1128 ** of the library by 738 bytes on ix86. 1129 */ 1130 #ifdef SQLITE_BITMASK_TYPE 1131 typedef SQLITE_BITMASK_TYPE Bitmask; 1132 #else 1133 typedef u64 Bitmask; 1134 #endif 1135 1136 /* 1137 ** The number of bits in a Bitmask. "BMS" means "BitMask Size". 1138 */ 1139 #define BMS ((int)(sizeof(Bitmask)*8)) 1140 1141 /* 1142 ** A bit in a Bitmask 1143 */ 1144 #define MASKBIT(n) (((Bitmask)1)<<(n)) 1145 #define MASKBIT64(n) (((u64)1)<<(n)) 1146 #define MASKBIT32(n) (((unsigned int)1)<<(n)) 1147 #define ALLBITS ((Bitmask)-1) 1148 1149 /* A VList object records a mapping between parameters/variables/wildcards 1150 ** in the SQL statement (such as $abc, @pqr, or :xyz) and the integer 1151 ** variable number associated with that parameter. See the format description 1152 ** on the sqlite3VListAdd() routine for more information. A VList is really 1153 ** just an array of integers. 1154 */ 1155 typedef int VList; 1156 1157 /* 1158 ** Defer sourcing vdbe.h and btree.h until after the "u8" and 1159 ** "BusyHandler" typedefs. vdbe.h also requires a few of the opaque 1160 ** pointer types (i.e. FuncDef) defined above. 1161 */ 1162 #include "btree.h" 1163 #include "vdbe.h" 1164 #include "pager.h" 1165 #include "pcache.h" 1166 #include "os.h" 1167 #include "mutex.h" 1168 1169 /* The SQLITE_EXTRA_DURABLE compile-time option used to set the default 1170 ** synchronous setting to EXTRA. It is no longer supported. 1171 */ 1172 #ifdef SQLITE_EXTRA_DURABLE 1173 # warning Use SQLITE_DEFAULT_SYNCHRONOUS=3 instead of SQLITE_EXTRA_DURABLE 1174 # define SQLITE_DEFAULT_SYNCHRONOUS 3 1175 #endif 1176 1177 /* 1178 ** Default synchronous levels. 1179 ** 1180 ** Note that (for historcal reasons) the PAGER_SYNCHRONOUS_* macros differ 1181 ** from the SQLITE_DEFAULT_SYNCHRONOUS value by 1. 1182 ** 1183 ** PAGER_SYNCHRONOUS DEFAULT_SYNCHRONOUS 1184 ** OFF 1 0 1185 ** NORMAL 2 1 1186 ** FULL 3 2 1187 ** EXTRA 4 3 1188 ** 1189 ** The "PRAGMA synchronous" statement also uses the zero-based numbers. 1190 ** In other words, the zero-based numbers are used for all external interfaces 1191 ** and the one-based values are used internally. 1192 */ 1193 #ifndef SQLITE_DEFAULT_SYNCHRONOUS 1194 # define SQLITE_DEFAULT_SYNCHRONOUS 2 1195 #endif 1196 #ifndef SQLITE_DEFAULT_WAL_SYNCHRONOUS 1197 # define SQLITE_DEFAULT_WAL_SYNCHRONOUS SQLITE_DEFAULT_SYNCHRONOUS 1198 #endif 1199 1200 /* 1201 ** Each database file to be accessed by the system is an instance 1202 ** of the following structure. There are normally two of these structures 1203 ** in the sqlite.aDb[] array. aDb[0] is the main database file and 1204 ** aDb[1] is the database file used to hold temporary tables. Additional 1205 ** databases may be attached. 1206 */ 1207 struct Db { 1208 char *zDbSName; /* Name of this database. (schema name, not filename) */ 1209 Btree *pBt; /* The B*Tree structure for this database file */ 1210 u8 safety_level; /* How aggressive at syncing data to disk */ 1211 u8 bSyncSet; /* True if "PRAGMA synchronous=N" has been run */ 1212 Schema *pSchema; /* Pointer to database schema (possibly shared) */ 1213 }; 1214 1215 /* 1216 ** An instance of the following structure stores a database schema. 1217 ** 1218 ** Most Schema objects are associated with a Btree. The exception is 1219 ** the Schema for the TEMP databaes (sqlite3.aDb[1]) which is free-standing. 1220 ** In shared cache mode, a single Schema object can be shared by multiple 1221 ** Btrees that refer to the same underlying BtShared object. 1222 ** 1223 ** Schema objects are automatically deallocated when the last Btree that 1224 ** references them is destroyed. The TEMP Schema is manually freed by 1225 ** sqlite3_close(). 1226 * 1227 ** A thread must be holding a mutex on the corresponding Btree in order 1228 ** to access Schema content. This implies that the thread must also be 1229 ** holding a mutex on the sqlite3 connection pointer that owns the Btree. 1230 ** For a TEMP Schema, only the connection mutex is required. 1231 */ 1232 struct Schema { 1233 int schema_cookie; /* Database schema version number for this file */ 1234 int iGeneration; /* Generation counter. Incremented with each change */ 1235 Hash tblHash; /* All tables indexed by name */ 1236 Hash idxHash; /* All (named) indices indexed by name */ 1237 Hash trigHash; /* All triggers indexed by name */ 1238 Hash fkeyHash; /* All foreign keys by referenced table name */ 1239 Table *pSeqTab; /* The sqlite_sequence table used by AUTOINCREMENT */ 1240 u8 file_format; /* Schema format version for this file */ 1241 u8 enc; /* Text encoding used by this database */ 1242 u16 schemaFlags; /* Flags associated with this schema */ 1243 int cache_size; /* Number of pages to use in the cache */ 1244 }; 1245 1246 /* 1247 ** These macros can be used to test, set, or clear bits in the 1248 ** Db.pSchema->flags field. 1249 */ 1250 #define DbHasProperty(D,I,P) (((D)->aDb[I].pSchema->schemaFlags&(P))==(P)) 1251 #define DbHasAnyProperty(D,I,P) (((D)->aDb[I].pSchema->schemaFlags&(P))!=0) 1252 #define DbSetProperty(D,I,P) (D)->aDb[I].pSchema->schemaFlags|=(P) 1253 #define DbClearProperty(D,I,P) (D)->aDb[I].pSchema->schemaFlags&=~(P) 1254 1255 /* 1256 ** Allowed values for the DB.pSchema->flags field. 1257 ** 1258 ** The DB_SchemaLoaded flag is set after the database schema has been 1259 ** read into internal hash tables. 1260 ** 1261 ** DB_UnresetViews means that one or more views have column names that 1262 ** have been filled out. If the schema changes, these column names might 1263 ** changes and so the view will need to be reset. 1264 */ 1265 #define DB_SchemaLoaded 0x0001 /* The schema has been loaded */ 1266 #define DB_UnresetViews 0x0002 /* Some views have defined column names */ 1267 #define DB_ResetWanted 0x0008 /* Reset the schema when nSchemaLock==0 */ 1268 1269 /* 1270 ** The number of different kinds of things that can be limited 1271 ** using the sqlite3_limit() interface. 1272 */ 1273 #define SQLITE_N_LIMIT (SQLITE_LIMIT_WORKER_THREADS+1) 1274 1275 /* 1276 ** Lookaside malloc is a set of fixed-size buffers that can be used 1277 ** to satisfy small transient memory allocation requests for objects 1278 ** associated with a particular database connection. The use of 1279 ** lookaside malloc provides a significant performance enhancement 1280 ** (approx 10%) by avoiding numerous malloc/free requests while parsing 1281 ** SQL statements. 1282 ** 1283 ** The Lookaside structure holds configuration information about the 1284 ** lookaside malloc subsystem. Each available memory allocation in 1285 ** the lookaside subsystem is stored on a linked list of LookasideSlot 1286 ** objects. 1287 ** 1288 ** Lookaside allocations are only allowed for objects that are associated 1289 ** with a particular database connection. Hence, schema information cannot 1290 ** be stored in lookaside because in shared cache mode the schema information 1291 ** is shared by multiple database connections. Therefore, while parsing 1292 ** schema information, the Lookaside.bEnabled flag is cleared so that 1293 ** lookaside allocations are not used to construct the schema objects. 1294 ** 1295 ** New lookaside allocations are only allowed if bDisable==0. When 1296 ** bDisable is greater than zero, sz is set to zero which effectively 1297 ** disables lookaside without adding a new test for the bDisable flag 1298 ** in a performance-critical path. sz should be set by to szTrue whenever 1299 ** bDisable changes back to zero. 1300 ** 1301 ** Lookaside buffers are initially held on the pInit list. As they are 1302 ** used and freed, they are added back to the pFree list. New allocations 1303 ** come off of pFree first, then pInit as a fallback. This dual-list 1304 ** allows use to compute a high-water mark - the maximum number of allocations 1305 ** outstanding at any point in the past - by subtracting the number of 1306 ** allocations on the pInit list from the total number of allocations. 1307 ** 1308 ** Enhancement on 2019-12-12: Two-size-lookaside 1309 ** The default lookaside configuration is 100 slots of 1200 bytes each. 1310 ** The larger slot sizes are important for performance, but they waste 1311 ** a lot of space, as most lookaside allocations are less than 128 bytes. 1312 ** The two-size-lookaside enhancement breaks up the lookaside allocation 1313 ** into two pools: One of 128-byte slots and the other of the default size 1314 ** (1200-byte) slots. Allocations are filled from the small-pool first, 1315 ** failing over to the full-size pool if that does not work. Thus more 1316 ** lookaside slots are available while also using less memory. 1317 ** This enhancement can be omitted by compiling with 1318 ** SQLITE_OMIT_TWOSIZE_LOOKASIDE. 1319 */ 1320 struct Lookaside { 1321 u32 bDisable; /* Only operate the lookaside when zero */ 1322 u16 sz; /* Size of each buffer in bytes */ 1323 u16 szTrue; /* True value of sz, even if disabled */ 1324 u8 bMalloced; /* True if pStart obtained from sqlite3_malloc() */ 1325 u32 nSlot; /* Number of lookaside slots allocated */ 1326 u32 anStat[3]; /* 0: hits. 1: size misses. 2: full misses */ 1327 LookasideSlot *pInit; /* List of buffers not previously used */ 1328 LookasideSlot *pFree; /* List of available buffers */ 1329 #ifndef SQLITE_OMIT_TWOSIZE_LOOKASIDE 1330 LookasideSlot *pSmallInit; /* List of small buffers not prediously used */ 1331 LookasideSlot *pSmallFree; /* List of available small buffers */ 1332 void *pMiddle; /* First byte past end of full-size buffers and 1333 ** the first byte of LOOKASIDE_SMALL buffers */ 1334 #endif /* SQLITE_OMIT_TWOSIZE_LOOKASIDE */ 1335 void *pStart; /* First byte of available memory space */ 1336 void *pEnd; /* First byte past end of available space */ 1337 }; 1338 struct LookasideSlot { 1339 LookasideSlot *pNext; /* Next buffer in the list of free buffers */ 1340 }; 1341 1342 #define DisableLookaside db->lookaside.bDisable++;db->lookaside.sz=0 1343 #define EnableLookaside db->lookaside.bDisable--;\ 1344 db->lookaside.sz=db->lookaside.bDisable?0:db->lookaside.szTrue 1345 1346 /* Size of the smaller allocations in two-size lookside */ 1347 #ifdef SQLITE_OMIT_TWOSIZE_LOOKASIDE 1348 # define LOOKASIDE_SMALL 0 1349 #else 1350 # define LOOKASIDE_SMALL 128 1351 #endif 1352 1353 /* 1354 ** A hash table for built-in function definitions. (Application-defined 1355 ** functions use a regular table table from hash.h.) 1356 ** 1357 ** Hash each FuncDef structure into one of the FuncDefHash.a[] slots. 1358 ** Collisions are on the FuncDef.u.pHash chain. Use the SQLITE_FUNC_HASH() 1359 ** macro to compute a hash on the function name. 1360 */ 1361 #define SQLITE_FUNC_HASH_SZ 23 1362 struct FuncDefHash { 1363 FuncDef *a[SQLITE_FUNC_HASH_SZ]; /* Hash table for functions */ 1364 }; 1365 #define SQLITE_FUNC_HASH(C,L) (((C)+(L))%SQLITE_FUNC_HASH_SZ) 1366 1367 #ifdef SQLITE_USER_AUTHENTICATION 1368 /* 1369 ** Information held in the "sqlite3" database connection object and used 1370 ** to manage user authentication. 1371 */ 1372 typedef struct sqlite3_userauth sqlite3_userauth; 1373 struct sqlite3_userauth { 1374 u8 authLevel; /* Current authentication level */ 1375 int nAuthPW; /* Size of the zAuthPW in bytes */ 1376 char *zAuthPW; /* Password used to authenticate */ 1377 char *zAuthUser; /* User name used to authenticate */ 1378 }; 1379 1380 /* Allowed values for sqlite3_userauth.authLevel */ 1381 #define UAUTH_Unknown 0 /* Authentication not yet checked */ 1382 #define UAUTH_Fail 1 /* User authentication failed */ 1383 #define UAUTH_User 2 /* Authenticated as a normal user */ 1384 #define UAUTH_Admin 3 /* Authenticated as an administrator */ 1385 1386 /* Functions used only by user authorization logic */ 1387 int sqlite3UserAuthTable(const char*); 1388 int sqlite3UserAuthCheckLogin(sqlite3*,const char*,u8*); 1389 void sqlite3UserAuthInit(sqlite3*); 1390 void sqlite3CryptFunc(sqlite3_context*,int,sqlite3_value**); 1391 1392 #endif /* SQLITE_USER_AUTHENTICATION */ 1393 1394 /* 1395 ** typedef for the authorization callback function. 1396 */ 1397 #ifdef SQLITE_USER_AUTHENTICATION 1398 typedef int (*sqlite3_xauth)(void*,int,const char*,const char*,const char*, 1399 const char*, const char*); 1400 #else 1401 typedef int (*sqlite3_xauth)(void*,int,const char*,const char*,const char*, 1402 const char*); 1403 #endif 1404 1405 #ifndef SQLITE_OMIT_DEPRECATED 1406 /* This is an extra SQLITE_TRACE macro that indicates "legacy" tracing 1407 ** in the style of sqlite3_trace() 1408 */ 1409 #define SQLITE_TRACE_LEGACY 0x40 /* Use the legacy xTrace */ 1410 #define SQLITE_TRACE_XPROFILE 0x80 /* Use the legacy xProfile */ 1411 #else 1412 #define SQLITE_TRACE_LEGACY 0 1413 #define SQLITE_TRACE_XPROFILE 0 1414 #endif /* SQLITE_OMIT_DEPRECATED */ 1415 #define SQLITE_TRACE_NONLEGACY_MASK 0x0f /* Normal flags */ 1416 1417 1418 /* 1419 ** Each database connection is an instance of the following structure. 1420 */ 1421 struct sqlite3 { 1422 sqlite3_vfs *pVfs; /* OS Interface */ 1423 struct Vdbe *pVdbe; /* List of active virtual machines */ 1424 CollSeq *pDfltColl; /* BINARY collseq for the database encoding */ 1425 sqlite3_mutex *mutex; /* Connection mutex */ 1426 Db *aDb; /* All backends */ 1427 int nDb; /* Number of backends currently in use */ 1428 u32 mDbFlags; /* flags recording internal state */ 1429 u64 flags; /* flags settable by pragmas. See below */ 1430 i64 lastRowid; /* ROWID of most recent insert (see above) */ 1431 i64 szMmap; /* Default mmap_size setting */ 1432 u32 nSchemaLock; /* Do not reset the schema when non-zero */ 1433 unsigned int openFlags; /* Flags passed to sqlite3_vfs.xOpen() */ 1434 int errCode; /* Most recent error code (SQLITE_*) */ 1435 int errMask; /* & result codes with this before returning */ 1436 int iSysErrno; /* Errno value from last system error */ 1437 u16 dbOptFlags; /* Flags to enable/disable optimizations */ 1438 u8 enc; /* Text encoding */ 1439 u8 autoCommit; /* The auto-commit flag. */ 1440 u8 temp_store; /* 1: file 2: memory 0: default */ 1441 u8 mallocFailed; /* True if we have seen a malloc failure */ 1442 u8 bBenignMalloc; /* Do not require OOMs if true */ 1443 u8 dfltLockMode; /* Default locking-mode for attached dbs */ 1444 signed char nextAutovac; /* Autovac setting after VACUUM if >=0 */ 1445 u8 suppressErr; /* Do not issue error messages if true */ 1446 u8 vtabOnConflict; /* Value to return for s3_vtab_on_conflict() */ 1447 u8 isTransactionSavepoint; /* True if the outermost savepoint is a TS */ 1448 u8 mTrace; /* zero or more SQLITE_TRACE flags */ 1449 u8 noSharedCache; /* True if no shared-cache backends */ 1450 u8 nSqlExec; /* Number of pending OP_SqlExec opcodes */ 1451 int nextPagesize; /* Pagesize after VACUUM if >0 */ 1452 u32 magic; /* Magic number for detect library misuse */ 1453 int nChange; /* Value returned by sqlite3_changes() */ 1454 int nTotalChange; /* Value returned by sqlite3_total_changes() */ 1455 int aLimit[SQLITE_N_LIMIT]; /* Limits */ 1456 int nMaxSorterMmap; /* Maximum size of regions mapped by sorter */ 1457 struct sqlite3InitInfo { /* Information used during initialization */ 1458 int newTnum; /* Rootpage of table being initialized */ 1459 u8 iDb; /* Which db file is being initialized */ 1460 u8 busy; /* TRUE if currently initializing */ 1461 unsigned orphanTrigger : 1; /* Last statement is orphaned TEMP trigger */ 1462 unsigned imposterTable : 1; /* Building an imposter table */ 1463 unsigned reopenMemdb : 1; /* ATTACH is really a reopen using MemDB */ 1464 char **azInit; /* "type", "name", and "tbl_name" columns */ 1465 } init; 1466 int nVdbeActive; /* Number of VDBEs currently running */ 1467 int nVdbeRead; /* Number of active VDBEs that read or write */ 1468 int nVdbeWrite; /* Number of active VDBEs that read and write */ 1469 int nVdbeExec; /* Number of nested calls to VdbeExec() */ 1470 int nVDestroy; /* Number of active OP_VDestroy operations */ 1471 int nExtension; /* Number of loaded extensions */ 1472 void **aExtension; /* Array of shared library handles */ 1473 int (*xTrace)(u32,void*,void*,void*); /* Trace function */ 1474 void *pTraceArg; /* Argument to the trace function */ 1475 #ifndef SQLITE_OMIT_DEPRECATED 1476 void (*xProfile)(void*,const char*,u64); /* Profiling function */ 1477 void *pProfileArg; /* Argument to profile function */ 1478 #endif 1479 void *pCommitArg; /* Argument to xCommitCallback() */ 1480 int (*xCommitCallback)(void*); /* Invoked at every commit. */ 1481 void *pRollbackArg; /* Argument to xRollbackCallback() */ 1482 void (*xRollbackCallback)(void*); /* Invoked at every commit. */ 1483 void *pUpdateArg; 1484 void (*xUpdateCallback)(void*,int, const char*,const char*,sqlite_int64); 1485 Parse *pParse; /* Current parse */ 1486 #ifdef SQLITE_ENABLE_PREUPDATE_HOOK 1487 void *pPreUpdateArg; /* First argument to xPreUpdateCallback */ 1488 void (*xPreUpdateCallback)( /* Registered using sqlite3_preupdate_hook() */ 1489 void*,sqlite3*,int,char const*,char const*,sqlite3_int64,sqlite3_int64 1490 ); 1491 PreUpdate *pPreUpdate; /* Context for active pre-update callback */ 1492 #endif /* SQLITE_ENABLE_PREUPDATE_HOOK */ 1493 #ifndef SQLITE_OMIT_WAL 1494 int (*xWalCallback)(void *, sqlite3 *, const char *, int); 1495 void *pWalArg; 1496 #endif 1497 void(*xCollNeeded)(void*,sqlite3*,int eTextRep,const char*); 1498 void(*xCollNeeded16)(void*,sqlite3*,int eTextRep,const void*); 1499 void *pCollNeededArg; 1500 sqlite3_value *pErr; /* Most recent error message */ 1501 union { 1502 volatile int isInterrupted; /* True if sqlite3_interrupt has been called */ 1503 double notUsed1; /* Spacer */ 1504 } u1; 1505 Lookaside lookaside; /* Lookaside malloc configuration */ 1506 #ifndef SQLITE_OMIT_AUTHORIZATION 1507 sqlite3_xauth xAuth; /* Access authorization function */ 1508 void *pAuthArg; /* 1st argument to the access auth function */ 1509 #endif 1510 #ifndef SQLITE_OMIT_PROGRESS_CALLBACK 1511 int (*xProgress)(void *); /* The progress callback */ 1512 void *pProgressArg; /* Argument to the progress callback */ 1513 unsigned nProgressOps; /* Number of opcodes for progress callback */ 1514 #endif 1515 #ifndef SQLITE_OMIT_VIRTUALTABLE 1516 int nVTrans; /* Allocated size of aVTrans */ 1517 Hash aModule; /* populated by sqlite3_create_module() */ 1518 VtabCtx *pVtabCtx; /* Context for active vtab connect/create */ 1519 VTable **aVTrans; /* Virtual tables with open transactions */ 1520 VTable *pDisconnect; /* Disconnect these in next sqlite3_prepare() */ 1521 #endif 1522 Hash aFunc; /* Hash table of connection functions */ 1523 Hash aCollSeq; /* All collating sequences */ 1524 BusyHandler busyHandler; /* Busy callback */ 1525 Db aDbStatic[2]; /* Static space for the 2 default backends */ 1526 Savepoint *pSavepoint; /* List of active savepoints */ 1527 int busyTimeout; /* Busy handler timeout, in msec */ 1528 int nSavepoint; /* Number of non-transaction savepoints */ 1529 int nStatement; /* Number of nested statement-transactions */ 1530 i64 nDeferredCons; /* Net deferred constraints this transaction. */ 1531 i64 nDeferredImmCons; /* Net deferred immediate constraints */ 1532 int *pnBytesFreed; /* If not NULL, increment this in DbFree() */ 1533 #ifdef SQLITE_ENABLE_UNLOCK_NOTIFY 1534 /* The following variables are all protected by the STATIC_MASTER 1535 ** mutex, not by sqlite3.mutex. They are used by code in notify.c. 1536 ** 1537 ** When X.pUnlockConnection==Y, that means that X is waiting for Y to 1538 ** unlock so that it can proceed. 1539 ** 1540 ** When X.pBlockingConnection==Y, that means that something that X tried 1541 ** tried to do recently failed with an SQLITE_LOCKED error due to locks 1542 ** held by Y. 1543 */ 1544 sqlite3 *pBlockingConnection; /* Connection that caused SQLITE_LOCKED */ 1545 sqlite3 *pUnlockConnection; /* Connection to watch for unlock */ 1546 void *pUnlockArg; /* Argument to xUnlockNotify */ 1547 void (*xUnlockNotify)(void **, int); /* Unlock notify callback */ 1548 sqlite3 *pNextBlocked; /* Next in list of all blocked connections */ 1549 #endif 1550 #ifdef SQLITE_USER_AUTHENTICATION 1551 sqlite3_userauth auth; /* User authentication information */ 1552 #endif 1553 }; 1554 1555 /* 1556 ** A macro to discover the encoding of a database. 1557 */ 1558 #define SCHEMA_ENC(db) ((db)->aDb[0].pSchema->enc) 1559 #define ENC(db) ((db)->enc) 1560 1561 /* 1562 ** A u64 constant where the lower 32 bits are all zeros. Only the 1563 ** upper 32 bits are included in the argument. Necessary because some 1564 ** C-compilers still do not accept LL integer literals. 1565 */ 1566 #define HI(X) ((u64)(X)<<32) 1567 1568 /* 1569 ** Possible values for the sqlite3.flags. 1570 ** 1571 ** Value constraints (enforced via assert()): 1572 ** SQLITE_FullFSync == PAGER_FULLFSYNC 1573 ** SQLITE_CkptFullFSync == PAGER_CKPT_FULLFSYNC 1574 ** SQLITE_CacheSpill == PAGER_CACHE_SPILL 1575 */ 1576 #define SQLITE_WriteSchema 0x00000001 /* OK to update SQLITE_MASTER */ 1577 #define SQLITE_LegacyFileFmt 0x00000002 /* Create new databases in format 1 */ 1578 #define SQLITE_FullColNames 0x00000004 /* Show full column names on SELECT */ 1579 #define SQLITE_FullFSync 0x00000008 /* Use full fsync on the backend */ 1580 #define SQLITE_CkptFullFSync 0x00000010 /* Use full fsync for checkpoint */ 1581 #define SQLITE_CacheSpill 0x00000020 /* OK to spill pager cache */ 1582 #define SQLITE_ShortColNames 0x00000040 /* Show short columns names */ 1583 #define SQLITE_TrustedSchema 0x00000080 /* Allow unsafe functions and 1584 ** vtabs in the schema definition */ 1585 #define SQLITE_NullCallback 0x00000100 /* Invoke the callback once if the */ 1586 /* result set is empty */ 1587 #define SQLITE_IgnoreChecks 0x00000200 /* Do not enforce check constraints */ 1588 #define SQLITE_ReadUncommit 0x00000400 /* READ UNCOMMITTED in shared-cache */ 1589 #define SQLITE_NoCkptOnClose 0x00000800 /* No checkpoint on close()/DETACH */ 1590 #define SQLITE_ReverseOrder 0x00001000 /* Reverse unordered SELECTs */ 1591 #define SQLITE_RecTriggers 0x00002000 /* Enable recursive triggers */ 1592 #define SQLITE_ForeignKeys 0x00004000 /* Enforce foreign key constraints */ 1593 #define SQLITE_AutoIndex 0x00008000 /* Enable automatic indexes */ 1594 #define SQLITE_LoadExtension 0x00010000 /* Enable load_extension */ 1595 #define SQLITE_LoadExtFunc 0x00020000 /* Enable load_extension() SQL func */ 1596 #define SQLITE_EnableTrigger 0x00040000 /* True to enable triggers */ 1597 #define SQLITE_DeferFKs 0x00080000 /* Defer all FK constraints */ 1598 #define SQLITE_QueryOnly 0x00100000 /* Disable database changes */ 1599 #define SQLITE_CellSizeCk 0x00200000 /* Check btree cell sizes on load */ 1600 #define SQLITE_Fts3Tokenizer 0x00400000 /* Enable fts3_tokenizer(2) */ 1601 #define SQLITE_EnableQPSG 0x00800000 /* Query Planner Stability Guarantee*/ 1602 #define SQLITE_TriggerEQP 0x01000000 /* Show trigger EXPLAIN QUERY PLAN */ 1603 #define SQLITE_ResetDatabase 0x02000000 /* Reset the database */ 1604 #define SQLITE_LegacyAlter 0x04000000 /* Legacy ALTER TABLE behaviour */ 1605 #define SQLITE_NoSchemaError 0x08000000 /* Do not report schema parse errors*/ 1606 #define SQLITE_Defensive 0x10000000 /* Input SQL is likely hostile */ 1607 #define SQLITE_DqsDDL 0x20000000 /* dbl-quoted strings allowed in DDL*/ 1608 #define SQLITE_DqsDML 0x40000000 /* dbl-quoted strings allowed in DML*/ 1609 #define SQLITE_EnableView 0x80000000 /* Enable the use of views */ 1610 #define SQLITE_CountRows HI(0x00001) /* Count rows changed by INSERT, */ 1611 /* DELETE, or UPDATE and return */ 1612 /* the count using a callback. */ 1613 1614 /* Flags used only if debugging */ 1615 #ifdef SQLITE_DEBUG 1616 #define SQLITE_SqlTrace HI(0x0100000) /* Debug print SQL as it executes */ 1617 #define SQLITE_VdbeListing HI(0x0200000) /* Debug listings of VDBE progs */ 1618 #define SQLITE_VdbeTrace HI(0x0400000) /* True to trace VDBE execution */ 1619 #define SQLITE_VdbeAddopTrace HI(0x0800000) /* Trace sqlite3VdbeAddOp() calls */ 1620 #define SQLITE_VdbeEQP HI(0x1000000) /* Debug EXPLAIN QUERY PLAN */ 1621 #define SQLITE_ParserTrace HI(0x2000000) /* PRAGMA parser_trace=ON */ 1622 #endif 1623 1624 /* 1625 ** Allowed values for sqlite3.mDbFlags 1626 */ 1627 #define DBFLAG_SchemaChange 0x0001 /* Uncommitted Hash table changes */ 1628 #define DBFLAG_PreferBuiltin 0x0002 /* Preference to built-in funcs */ 1629 #define DBFLAG_Vacuum 0x0004 /* Currently in a VACUUM */ 1630 #define DBFLAG_VacuumInto 0x0008 /* Currently running VACUUM INTO */ 1631 #define DBFLAG_SchemaKnownOk 0x0010 /* Schema is known to be valid */ 1632 #define DBFLAG_InternalFunc 0x0020 /* Allow use of internal functions */ 1633 #define DBFLAG_EncodingFixed 0x0040 /* No longer possible to change enc. */ 1634 1635 /* 1636 ** Bits of the sqlite3.dbOptFlags field that are used by the 1637 ** sqlite3_test_control(SQLITE_TESTCTRL_OPTIMIZATIONS,...) interface to 1638 ** selectively disable various optimizations. 1639 */ 1640 #define SQLITE_QueryFlattener 0x0001 /* Query flattening */ 1641 #define SQLITE_WindowFunc 0x0002 /* Use xInverse for window functions */ 1642 #define SQLITE_GroupByOrder 0x0004 /* GROUPBY cover of ORDERBY */ 1643 #define SQLITE_FactorOutConst 0x0008 /* Constant factoring */ 1644 #define SQLITE_DistinctOpt 0x0010 /* DISTINCT using indexes */ 1645 #define SQLITE_CoverIdxScan 0x0020 /* Covering index scans */ 1646 #define SQLITE_OrderByIdxJoin 0x0040 /* ORDER BY of joins via index */ 1647 #define SQLITE_Transitive 0x0080 /* Transitive constraints */ 1648 #define SQLITE_OmitNoopJoin 0x0100 /* Omit unused tables in joins */ 1649 #define SQLITE_CountOfView 0x0200 /* The count-of-view optimization */ 1650 #define SQLITE_CursorHints 0x0400 /* Add OP_CursorHint opcodes */ 1651 #define SQLITE_Stat4 0x0800 /* Use STAT4 data */ 1652 /* TH3 expects the Stat4 ^^^^^^ value to be 0x0800. Don't change it */ 1653 #define SQLITE_PushDown 0x1000 /* The push-down optimization */ 1654 #define SQLITE_SimplifyJoin 0x2000 /* Convert LEFT JOIN to JOIN */ 1655 #define SQLITE_SkipScan 0x4000 /* Skip-scans */ 1656 #define SQLITE_PropagateConst 0x8000 /* The constant propagation opt */ 1657 #define SQLITE_AllOpts 0xffff /* All optimizations */ 1658 1659 /* 1660 ** Macros for testing whether or not optimizations are enabled or disabled. 1661 */ 1662 #define OptimizationDisabled(db, mask) (((db)->dbOptFlags&(mask))!=0) 1663 #define OptimizationEnabled(db, mask) (((db)->dbOptFlags&(mask))==0) 1664 1665 /* 1666 ** Return true if it OK to factor constant expressions into the initialization 1667 ** code. The argument is a Parse object for the code generator. 1668 */ 1669 #define ConstFactorOk(P) ((P)->okConstFactor) 1670 1671 /* 1672 ** Possible values for the sqlite.magic field. 1673 ** The numbers are obtained at random and have no special meaning, other 1674 ** than being distinct from one another. 1675 */ 1676 #define SQLITE_MAGIC_OPEN 0xa029a697 /* Database is open */ 1677 #define SQLITE_MAGIC_CLOSED 0x9f3c2d33 /* Database is closed */ 1678 #define SQLITE_MAGIC_SICK 0x4b771290 /* Error and awaiting close */ 1679 #define SQLITE_MAGIC_BUSY 0xf03b7906 /* Database currently in use */ 1680 #define SQLITE_MAGIC_ERROR 0xb5357930 /* An SQLITE_MISUSE error occurred */ 1681 #define SQLITE_MAGIC_ZOMBIE 0x64cffc7f /* Close with last statement close */ 1682 1683 /* 1684 ** Each SQL function is defined by an instance of the following 1685 ** structure. For global built-in functions (ex: substr(), max(), count()) 1686 ** a pointer to this structure is held in the sqlite3BuiltinFunctions object. 1687 ** For per-connection application-defined functions, a pointer to this 1688 ** structure is held in the db->aHash hash table. 1689 ** 1690 ** The u.pHash field is used by the global built-ins. The u.pDestructor 1691 ** field is used by per-connection app-def functions. 1692 */ 1693 struct FuncDef { 1694 i8 nArg; /* Number of arguments. -1 means unlimited */ 1695 u32 funcFlags; /* Some combination of SQLITE_FUNC_* */ 1696 void *pUserData; /* User data parameter */ 1697 FuncDef *pNext; /* Next function with same name */ 1698 void (*xSFunc)(sqlite3_context*,int,sqlite3_value**); /* func or agg-step */ 1699 void (*xFinalize)(sqlite3_context*); /* Agg finalizer */ 1700 void (*xValue)(sqlite3_context*); /* Current agg value */ 1701 void (*xInverse)(sqlite3_context*,int,sqlite3_value**); /* inverse agg-step */ 1702 const char *zName; /* SQL name of the function. */ 1703 union { 1704 FuncDef *pHash; /* Next with a different name but the same hash */ 1705 FuncDestructor *pDestructor; /* Reference counted destructor function */ 1706 } u; 1707 }; 1708 1709 /* 1710 ** This structure encapsulates a user-function destructor callback (as 1711 ** configured using create_function_v2()) and a reference counter. When 1712 ** create_function_v2() is called to create a function with a destructor, 1713 ** a single object of this type is allocated. FuncDestructor.nRef is set to 1714 ** the number of FuncDef objects created (either 1 or 3, depending on whether 1715 ** or not the specified encoding is SQLITE_ANY). The FuncDef.pDestructor 1716 ** member of each of the new FuncDef objects is set to point to the allocated 1717 ** FuncDestructor. 1718 ** 1719 ** Thereafter, when one of the FuncDef objects is deleted, the reference 1720 ** count on this object is decremented. When it reaches 0, the destructor 1721 ** is invoked and the FuncDestructor structure freed. 1722 */ 1723 struct FuncDestructor { 1724 int nRef; 1725 void (*xDestroy)(void *); 1726 void *pUserData; 1727 }; 1728 1729 /* 1730 ** Possible values for FuncDef.flags. Note that the _LENGTH and _TYPEOF 1731 ** values must correspond to OPFLAG_LENGTHARG and OPFLAG_TYPEOFARG. And 1732 ** SQLITE_FUNC_CONSTANT must be the same as SQLITE_DETERMINISTIC. There 1733 ** are assert() statements in the code to verify this. 1734 ** 1735 ** Value constraints (enforced via assert()): 1736 ** SQLITE_FUNC_MINMAX == NC_MinMaxAgg == SF_MinMaxAgg 1737 ** SQLITE_FUNC_LENGTH == OPFLAG_LENGTHARG 1738 ** SQLITE_FUNC_TYPEOF == OPFLAG_TYPEOFARG 1739 ** SQLITE_FUNC_CONSTANT == SQLITE_DETERMINISTIC from the API 1740 ** SQLITE_FUNC_DIRECT == SQLITE_DIRECTONLY from the API 1741 ** SQLITE_FUNC_UNSAFE == SQLITE_INNOCUOUS 1742 ** SQLITE_FUNC_ENCMASK depends on SQLITE_UTF* macros in the API 1743 */ 1744 #define SQLITE_FUNC_ENCMASK 0x0003 /* SQLITE_UTF8, SQLITE_UTF16BE or UTF16LE */ 1745 #define SQLITE_FUNC_LIKE 0x0004 /* Candidate for the LIKE optimization */ 1746 #define SQLITE_FUNC_CASE 0x0008 /* Case-sensitive LIKE-type function */ 1747 #define SQLITE_FUNC_EPHEM 0x0010 /* Ephemeral. Delete with VDBE */ 1748 #define SQLITE_FUNC_NEEDCOLL 0x0020 /* sqlite3GetFuncCollSeq() might be called*/ 1749 #define SQLITE_FUNC_LENGTH 0x0040 /* Built-in length() function */ 1750 #define SQLITE_FUNC_TYPEOF 0x0080 /* Built-in typeof() function */ 1751 #define SQLITE_FUNC_COUNT 0x0100 /* Built-in count(*) aggregate */ 1752 #define SQLITE_FUNC_COALESCE 0x0200 /* Built-in coalesce() or ifnull() */ 1753 #define SQLITE_FUNC_UNLIKELY 0x0400 /* Built-in unlikely() function */ 1754 #define SQLITE_FUNC_CONSTANT 0x0800 /* Constant inputs give a constant output */ 1755 #define SQLITE_FUNC_MINMAX 0x1000 /* True for min() and max() aggregates */ 1756 #define SQLITE_FUNC_SLOCHNG 0x2000 /* "Slow Change". Value constant during a 1757 ** single query - might change over time */ 1758 #define SQLITE_FUNC_TEST 0x4000 /* Built-in testing functions */ 1759 #define SQLITE_FUNC_OFFSET 0x8000 /* Built-in sqlite_offset() function */ 1760 #define SQLITE_FUNC_WINDOW 0x00010000 /* Built-in window-only function */ 1761 #define SQLITE_FUNC_INTERNAL 0x00040000 /* For use by NestedParse() only */ 1762 #define SQLITE_FUNC_DIRECT 0x00080000 /* Not for use in TRIGGERs or VIEWs */ 1763 #define SQLITE_FUNC_SUBTYPE 0x00100000 /* Result likely to have sub-type */ 1764 #define SQLITE_FUNC_UNSAFE 0x00200000 /* Function has side effects */ 1765 #define SQLITE_FUNC_INLINE 0x00400000 /* Functions implemented in-line */ 1766 1767 /* Identifier numbers for each in-line function */ 1768 #define INLINEFUNC_coalesce 0 1769 #define INLINEFUNC_implies_nonnull_row 1 1770 #define INLINEFUNC_expr_implies_expr 2 1771 #define INLINEFUNC_expr_compare 3 1772 #define INLINEFUNC_affinity 4 1773 #define INLINEFUNC_unlikely 99 /* Default case */ 1774 1775 /* 1776 ** The following three macros, FUNCTION(), LIKEFUNC() and AGGREGATE() are 1777 ** used to create the initializers for the FuncDef structures. 1778 ** 1779 ** FUNCTION(zName, nArg, iArg, bNC, xFunc) 1780 ** Used to create a scalar function definition of a function zName 1781 ** implemented by C function xFunc that accepts nArg arguments. The 1782 ** value passed as iArg is cast to a (void*) and made available 1783 ** as the user-data (sqlite3_user_data()) for the function. If 1784 ** argument bNC is true, then the SQLITE_FUNC_NEEDCOLL flag is set. 1785 ** 1786 ** VFUNCTION(zName, nArg, iArg, bNC, xFunc) 1787 ** Like FUNCTION except it omits the SQLITE_FUNC_CONSTANT flag. 1788 ** 1789 ** SFUNCTION(zName, nArg, iArg, bNC, xFunc) 1790 ** Like FUNCTION except it omits the SQLITE_FUNC_CONSTANT flag and 1791 ** adds the SQLITE_DIRECTONLY flag. 1792 ** 1793 ** INLINE_FUNC(zName, nArg, iFuncId, mFlags) 1794 ** zName is the name of a function that is implemented by in-line 1795 ** byte code rather than by the usual callbacks. The iFuncId 1796 ** parameter determines the function id. The mFlags parameter is 1797 ** optional SQLITE_FUNC_ flags for this function. 1798 ** 1799 ** TEST_FUNC(zName, nArg, iFuncId, mFlags) 1800 ** zName is the name of a test-only function implemented by in-line 1801 ** byte code rather than by the usual callbacks. The iFuncId 1802 ** parameter determines the function id. The mFlags parameter is 1803 ** optional SQLITE_FUNC_ flags for this function. 1804 ** 1805 ** DFUNCTION(zName, nArg, iArg, bNC, xFunc) 1806 ** Like FUNCTION except it omits the SQLITE_FUNC_CONSTANT flag and 1807 ** adds the SQLITE_FUNC_SLOCHNG flag. Used for date & time functions 1808 ** and functions like sqlite_version() that can change, but not during 1809 ** a single query. The iArg is ignored. The user-data is always set 1810 ** to a NULL pointer. The bNC parameter is not used. 1811 ** 1812 ** PURE_DATE(zName, nArg, iArg, bNC, xFunc) 1813 ** Used for "pure" date/time functions, this macro is like DFUNCTION 1814 ** except that it does set the SQLITE_FUNC_CONSTANT flags. iArg is 1815 ** ignored and the user-data for these functions is set to an 1816 ** arbitrary non-NULL pointer. The bNC parameter is not used. 1817 ** 1818 ** AGGREGATE(zName, nArg, iArg, bNC, xStep, xFinal) 1819 ** Used to create an aggregate function definition implemented by 1820 ** the C functions xStep and xFinal. The first four parameters 1821 ** are interpreted in the same way as the first 4 parameters to 1822 ** FUNCTION(). 1823 ** 1824 ** WFUNCTION(zName, nArg, iArg, xStep, xFinal, xValue, xInverse) 1825 ** Used to create an aggregate function definition implemented by 1826 ** the C functions xStep and xFinal. The first four parameters 1827 ** are interpreted in the same way as the first 4 parameters to 1828 ** FUNCTION(). 1829 ** 1830 ** LIKEFUNC(zName, nArg, pArg, flags) 1831 ** Used to create a scalar function definition of a function zName 1832 ** that accepts nArg arguments and is implemented by a call to C 1833 ** function likeFunc. Argument pArg is cast to a (void *) and made 1834 ** available as the function user-data (sqlite3_user_data()). The 1835 ** FuncDef.flags variable is set to the value passed as the flags 1836 ** parameter. 1837 */ 1838 #define FUNCTION(zName, nArg, iArg, bNC, xFunc) \ 1839 {nArg, SQLITE_FUNC_CONSTANT|SQLITE_UTF8|(bNC*SQLITE_FUNC_NEEDCOLL), \ 1840 SQLITE_INT_TO_PTR(iArg), 0, xFunc, 0, 0, 0, #zName, {0} } 1841 #define VFUNCTION(zName, nArg, iArg, bNC, xFunc) \ 1842 {nArg, SQLITE_UTF8|(bNC*SQLITE_FUNC_NEEDCOLL), \ 1843 SQLITE_INT_TO_PTR(iArg), 0, xFunc, 0, 0, 0, #zName, {0} } 1844 #define SFUNCTION(zName, nArg, iArg, bNC, xFunc) \ 1845 {nArg, SQLITE_UTF8|SQLITE_DIRECTONLY|SQLITE_FUNC_UNSAFE, \ 1846 SQLITE_INT_TO_PTR(iArg), 0, xFunc, 0, 0, 0, #zName, {0} } 1847 #define INLINE_FUNC(zName, nArg, iArg, mFlags) \ 1848 {nArg, SQLITE_UTF8|SQLITE_FUNC_INLINE|SQLITE_FUNC_CONSTANT|(mFlags), \ 1849 SQLITE_INT_TO_PTR(iArg), 0, noopFunc, 0, 0, 0, #zName, {0} } 1850 #define TEST_FUNC(zName, nArg, iArg, mFlags) \ 1851 {nArg, SQLITE_UTF8|SQLITE_FUNC_INTERNAL|SQLITE_FUNC_TEST| \ 1852 SQLITE_FUNC_INLINE|SQLITE_FUNC_CONSTANT|(mFlags), \ 1853 SQLITE_INT_TO_PTR(iArg), 0, noopFunc, 0, 0, 0, #zName, {0} } 1854 #define DFUNCTION(zName, nArg, iArg, bNC, xFunc) \ 1855 {nArg, SQLITE_FUNC_SLOCHNG|SQLITE_UTF8, \ 1856 0, 0, xFunc, 0, 0, 0, #zName, {0} } 1857 #define PURE_DATE(zName, nArg, iArg, bNC, xFunc) \ 1858 {nArg, SQLITE_FUNC_SLOCHNG|SQLITE_UTF8|SQLITE_FUNC_CONSTANT, \ 1859 (void*)&sqlite3Config, 0, xFunc, 0, 0, 0, #zName, {0} } 1860 #define FUNCTION2(zName, nArg, iArg, bNC, xFunc, extraFlags) \ 1861 {nArg,SQLITE_FUNC_CONSTANT|SQLITE_UTF8|(bNC*SQLITE_FUNC_NEEDCOLL)|extraFlags,\ 1862 SQLITE_INT_TO_PTR(iArg), 0, xFunc, 0, 0, 0, #zName, {0} } 1863 #define STR_FUNCTION(zName, nArg, pArg, bNC, xFunc) \ 1864 {nArg, SQLITE_FUNC_SLOCHNG|SQLITE_UTF8|(bNC*SQLITE_FUNC_NEEDCOLL), \ 1865 pArg, 0, xFunc, 0, 0, 0, #zName, } 1866 #define LIKEFUNC(zName, nArg, arg, flags) \ 1867 {nArg, SQLITE_FUNC_CONSTANT|SQLITE_UTF8|flags, \ 1868 (void *)arg, 0, likeFunc, 0, 0, 0, #zName, {0} } 1869 #define WAGGREGATE(zName, nArg, arg, nc, xStep, xFinal, xValue, xInverse, f) \ 1870 {nArg, SQLITE_UTF8|(nc*SQLITE_FUNC_NEEDCOLL)|f, \ 1871 SQLITE_INT_TO_PTR(arg), 0, xStep,xFinal,xValue,xInverse,#zName, {0}} 1872 #define INTERNAL_FUNCTION(zName, nArg, xFunc) \ 1873 {nArg, SQLITE_FUNC_INTERNAL|SQLITE_UTF8|SQLITE_FUNC_CONSTANT, \ 1874 0, 0, xFunc, 0, 0, 0, #zName, {0} } 1875 1876 1877 /* 1878 ** All current savepoints are stored in a linked list starting at 1879 ** sqlite3.pSavepoint. The first element in the list is the most recently 1880 ** opened savepoint. Savepoints are added to the list by the vdbe 1881 ** OP_Savepoint instruction. 1882 */ 1883 struct Savepoint { 1884 char *zName; /* Savepoint name (nul-terminated) */ 1885 i64 nDeferredCons; /* Number of deferred fk violations */ 1886 i64 nDeferredImmCons; /* Number of deferred imm fk. */ 1887 Savepoint *pNext; /* Parent savepoint (if any) */ 1888 }; 1889 1890 /* 1891 ** The following are used as the second parameter to sqlite3Savepoint(), 1892 ** and as the P1 argument to the OP_Savepoint instruction. 1893 */ 1894 #define SAVEPOINT_BEGIN 0 1895 #define SAVEPOINT_RELEASE 1 1896 #define SAVEPOINT_ROLLBACK 2 1897 1898 1899 /* 1900 ** Each SQLite module (virtual table definition) is defined by an 1901 ** instance of the following structure, stored in the sqlite3.aModule 1902 ** hash table. 1903 */ 1904 struct Module { 1905 const sqlite3_module *pModule; /* Callback pointers */ 1906 const char *zName; /* Name passed to create_module() */ 1907 int nRefModule; /* Number of pointers to this object */ 1908 void *pAux; /* pAux passed to create_module() */ 1909 void (*xDestroy)(void *); /* Module destructor function */ 1910 Table *pEpoTab; /* Eponymous table for this module */ 1911 }; 1912 1913 /* 1914 ** Information about each column of an SQL table is held in an instance 1915 ** of the Column structure, in the Table.aCol[] array. 1916 ** 1917 ** Definitions: 1918 ** 1919 ** "table column index" This is the index of the column in the 1920 ** Table.aCol[] array, and also the index of 1921 ** the column in the original CREATE TABLE stmt. 1922 ** 1923 ** "storage column index" This is the index of the column in the 1924 ** record BLOB generated by the OP_MakeRecord 1925 ** opcode. The storage column index is less than 1926 ** or equal to the table column index. It is 1927 ** equal if and only if there are no VIRTUAL 1928 ** columns to the left. 1929 */ 1930 struct Column { 1931 char *zName; /* Name of this column, \000, then the type */ 1932 Expr *pDflt; /* Default value or GENERATED ALWAYS AS value */ 1933 char *zColl; /* Collating sequence. If NULL, use the default */ 1934 u8 notNull; /* An OE_ code for handling a NOT NULL constraint */ 1935 char affinity; /* One of the SQLITE_AFF_... values */ 1936 u8 szEst; /* Estimated size of value in this column. sizeof(INT)==1 */ 1937 u16 colFlags; /* Boolean properties. See COLFLAG_ defines below */ 1938 }; 1939 1940 /* Allowed values for Column.colFlags: 1941 */ 1942 #define COLFLAG_PRIMKEY 0x0001 /* Column is part of the primary key */ 1943 #define COLFLAG_HIDDEN 0x0002 /* A hidden column in a virtual table */ 1944 #define COLFLAG_HASTYPE 0x0004 /* Type name follows column name */ 1945 #define COLFLAG_UNIQUE 0x0008 /* Column def contains "UNIQUE" or "PK" */ 1946 #define COLFLAG_SORTERREF 0x0010 /* Use sorter-refs with this column */ 1947 #define COLFLAG_VIRTUAL 0x0020 /* GENERATED ALWAYS AS ... VIRTUAL */ 1948 #define COLFLAG_STORED 0x0040 /* GENERATED ALWAYS AS ... STORED */ 1949 #define COLFLAG_NOTAVAIL 0x0080 /* STORED column not yet calculated */ 1950 #define COLFLAG_BUSY 0x0100 /* Blocks recursion on GENERATED columns */ 1951 #define COLFLAG_GENERATED 0x0060 /* Combo: _STORED, _VIRTUAL */ 1952 #define COLFLAG_NOINSERT 0x0062 /* Combo: _HIDDEN, _STORED, _VIRTUAL */ 1953 1954 /* 1955 ** A "Collating Sequence" is defined by an instance of the following 1956 ** structure. Conceptually, a collating sequence consists of a name and 1957 ** a comparison routine that defines the order of that sequence. 1958 ** 1959 ** If CollSeq.xCmp is NULL, it means that the 1960 ** collating sequence is undefined. Indices built on an undefined 1961 ** collating sequence may not be read or written. 1962 */ 1963 struct CollSeq { 1964 char *zName; /* Name of the collating sequence, UTF-8 encoded */ 1965 u8 enc; /* Text encoding handled by xCmp() */ 1966 void *pUser; /* First argument to xCmp() */ 1967 int (*xCmp)(void*,int, const void*, int, const void*); 1968 void (*xDel)(void*); /* Destructor for pUser */ 1969 }; 1970 1971 /* 1972 ** A sort order can be either ASC or DESC. 1973 */ 1974 #define SQLITE_SO_ASC 0 /* Sort in ascending order */ 1975 #define SQLITE_SO_DESC 1 /* Sort in ascending order */ 1976 #define SQLITE_SO_UNDEFINED -1 /* No sort order specified */ 1977 1978 /* 1979 ** Column affinity types. 1980 ** 1981 ** These used to have mnemonic name like 'i' for SQLITE_AFF_INTEGER and 1982 ** 't' for SQLITE_AFF_TEXT. But we can save a little space and improve 1983 ** the speed a little by numbering the values consecutively. 1984 ** 1985 ** But rather than start with 0 or 1, we begin with 'A'. That way, 1986 ** when multiple affinity types are concatenated into a string and 1987 ** used as the P4 operand, they will be more readable. 1988 ** 1989 ** Note also that the numeric types are grouped together so that testing 1990 ** for a numeric type is a single comparison. And the BLOB type is first. 1991 */ 1992 #define SQLITE_AFF_NONE 0x40 /* '@' */ 1993 #define SQLITE_AFF_BLOB 0x41 /* 'A' */ 1994 #define SQLITE_AFF_TEXT 0x42 /* 'B' */ 1995 #define SQLITE_AFF_NUMERIC 0x43 /* 'C' */ 1996 #define SQLITE_AFF_INTEGER 0x44 /* 'D' */ 1997 #define SQLITE_AFF_REAL 0x45 /* 'E' */ 1998 1999 #define sqlite3IsNumericAffinity(X) ((X)>=SQLITE_AFF_NUMERIC) 2000 2001 /* 2002 ** The SQLITE_AFF_MASK values masks off the significant bits of an 2003 ** affinity value. 2004 */ 2005 #define SQLITE_AFF_MASK 0x47 2006 2007 /* 2008 ** Additional bit values that can be ORed with an affinity without 2009 ** changing the affinity. 2010 ** 2011 ** The SQLITE_NOTNULL flag is a combination of NULLEQ and JUMPIFNULL. 2012 ** It causes an assert() to fire if either operand to a comparison 2013 ** operator is NULL. It is added to certain comparison operators to 2014 ** prove that the operands are always NOT NULL. 2015 */ 2016 #define SQLITE_KEEPNULL 0x08 /* Used by vector == or <> */ 2017 #define SQLITE_JUMPIFNULL 0x10 /* jumps if either operand is NULL */ 2018 #define SQLITE_STOREP2 0x20 /* Store result in reg[P2] rather than jump */ 2019 #define SQLITE_NULLEQ 0x80 /* NULL=NULL */ 2020 #define SQLITE_NOTNULL 0x90 /* Assert that operands are never NULL */ 2021 2022 /* 2023 ** An object of this type is created for each virtual table present in 2024 ** the database schema. 2025 ** 2026 ** If the database schema is shared, then there is one instance of this 2027 ** structure for each database connection (sqlite3*) that uses the shared 2028 ** schema. This is because each database connection requires its own unique 2029 ** instance of the sqlite3_vtab* handle used to access the virtual table 2030 ** implementation. sqlite3_vtab* handles can not be shared between 2031 ** database connections, even when the rest of the in-memory database 2032 ** schema is shared, as the implementation often stores the database 2033 ** connection handle passed to it via the xConnect() or xCreate() method 2034 ** during initialization internally. This database connection handle may 2035 ** then be used by the virtual table implementation to access real tables 2036 ** within the database. So that they appear as part of the callers 2037 ** transaction, these accesses need to be made via the same database 2038 ** connection as that used to execute SQL operations on the virtual table. 2039 ** 2040 ** All VTable objects that correspond to a single table in a shared 2041 ** database schema are initially stored in a linked-list pointed to by 2042 ** the Table.pVTable member variable of the corresponding Table object. 2043 ** When an sqlite3_prepare() operation is required to access the virtual 2044 ** table, it searches the list for the VTable that corresponds to the 2045 ** database connection doing the preparing so as to use the correct 2046 ** sqlite3_vtab* handle in the compiled query. 2047 ** 2048 ** When an in-memory Table object is deleted (for example when the 2049 ** schema is being reloaded for some reason), the VTable objects are not 2050 ** deleted and the sqlite3_vtab* handles are not xDisconnect()ed 2051 ** immediately. Instead, they are moved from the Table.pVTable list to 2052 ** another linked list headed by the sqlite3.pDisconnect member of the 2053 ** corresponding sqlite3 structure. They are then deleted/xDisconnected 2054 ** next time a statement is prepared using said sqlite3*. This is done 2055 ** to avoid deadlock issues involving multiple sqlite3.mutex mutexes. 2056 ** Refer to comments above function sqlite3VtabUnlockList() for an 2057 ** explanation as to why it is safe to add an entry to an sqlite3.pDisconnect 2058 ** list without holding the corresponding sqlite3.mutex mutex. 2059 ** 2060 ** The memory for objects of this type is always allocated by 2061 ** sqlite3DbMalloc(), using the connection handle stored in VTable.db as 2062 ** the first argument. 2063 */ 2064 struct VTable { 2065 sqlite3 *db; /* Database connection associated with this table */ 2066 Module *pMod; /* Pointer to module implementation */ 2067 sqlite3_vtab *pVtab; /* Pointer to vtab instance */ 2068 int nRef; /* Number of pointers to this structure */ 2069 u8 bConstraint; /* True if constraints are supported */ 2070 u8 eVtabRisk; /* Riskiness of allowing hacker access */ 2071 int iSavepoint; /* Depth of the SAVEPOINT stack */ 2072 VTable *pNext; /* Next in linked list (see above) */ 2073 }; 2074 2075 /* Allowed values for VTable.eVtabRisk 2076 */ 2077 #define SQLITE_VTABRISK_Low 0 2078 #define SQLITE_VTABRISK_Normal 1 2079 #define SQLITE_VTABRISK_High 2 2080 2081 /* 2082 ** The schema for each SQL table and view is represented in memory 2083 ** by an instance of the following structure. 2084 */ 2085 struct Table { 2086 char *zName; /* Name of the table or view */ 2087 Column *aCol; /* Information about each column */ 2088 Index *pIndex; /* List of SQL indexes on this table. */ 2089 Select *pSelect; /* NULL for tables. Points to definition if a view. */ 2090 FKey *pFKey; /* Linked list of all foreign keys in this table */ 2091 char *zColAff; /* String defining the affinity of each column */ 2092 ExprList *pCheck; /* All CHECK constraints */ 2093 /* ... also used as column name list in a VIEW */ 2094 int tnum; /* Root BTree page for this table */ 2095 u32 nTabRef; /* Number of pointers to this Table */ 2096 u32 tabFlags; /* Mask of TF_* values */ 2097 i16 iPKey; /* If not negative, use aCol[iPKey] as the rowid */ 2098 i16 nCol; /* Number of columns in this table */ 2099 i16 nNVCol; /* Number of columns that are not VIRTUAL */ 2100 LogEst nRowLogEst; /* Estimated rows in table - from sqlite_stat1 table */ 2101 LogEst szTabRow; /* Estimated size of each table row in bytes */ 2102 #ifdef SQLITE_ENABLE_COSTMULT 2103 LogEst costMult; /* Cost multiplier for using this table */ 2104 #endif 2105 u8 keyConf; /* What to do in case of uniqueness conflict on iPKey */ 2106 #ifndef SQLITE_OMIT_ALTERTABLE 2107 int addColOffset; /* Offset in CREATE TABLE stmt to add a new column */ 2108 #endif 2109 #ifndef SQLITE_OMIT_VIRTUALTABLE 2110 int nModuleArg; /* Number of arguments to the module */ 2111 char **azModuleArg; /* 0: module 1: schema 2: vtab name 3...: args */ 2112 VTable *pVTable; /* List of VTable objects. */ 2113 #endif 2114 Trigger *pTrigger; /* List of triggers stored in pSchema */ 2115 Schema *pSchema; /* Schema that contains this table */ 2116 Table *pNextZombie; /* Next on the Parse.pZombieTab list */ 2117 }; 2118 2119 /* 2120 ** Allowed values for Table.tabFlags. 2121 ** 2122 ** TF_OOOHidden applies to tables or view that have hidden columns that are 2123 ** followed by non-hidden columns. Example: "CREATE VIRTUAL TABLE x USING 2124 ** vtab1(a HIDDEN, b);". Since "b" is a non-hidden column but "a" is hidden, 2125 ** the TF_OOOHidden attribute would apply in this case. Such tables require 2126 ** special handling during INSERT processing. The "OOO" means "Out Of Order". 2127 ** 2128 ** Constraints: 2129 ** 2130 ** TF_HasVirtual == COLFLAG_Virtual 2131 ** TF_HasStored == COLFLAG_Stored 2132 */ 2133 #define TF_Readonly 0x0001 /* Read-only system table */ 2134 #define TF_Ephemeral 0x0002 /* An ephemeral table */ 2135 #define TF_HasPrimaryKey 0x0004 /* Table has a primary key */ 2136 #define TF_Autoincrement 0x0008 /* Integer primary key is autoincrement */ 2137 #define TF_HasStat1 0x0010 /* nRowLogEst set from sqlite_stat1 */ 2138 #define TF_HasVirtual 0x0020 /* Has one or more VIRTUAL columns */ 2139 #define TF_HasStored 0x0040 /* Has one or more STORED columns */ 2140 #define TF_HasGenerated 0x0060 /* Combo: HasVirtual + HasStored */ 2141 #define TF_WithoutRowid 0x0080 /* No rowid. PRIMARY KEY is the key */ 2142 #define TF_StatsUsed 0x0100 /* Query planner decisions affected by 2143 ** Index.aiRowLogEst[] values */ 2144 #define TF_NoVisibleRowid 0x0200 /* No user-visible "rowid" column */ 2145 #define TF_OOOHidden 0x0400 /* Out-of-Order hidden columns */ 2146 #define TF_HasNotNull 0x0800 /* Contains NOT NULL constraints */ 2147 #define TF_Shadow 0x1000 /* True for a shadow table */ 2148 2149 /* 2150 ** Test to see whether or not a table is a virtual table. This is 2151 ** done as a macro so that it will be optimized out when virtual 2152 ** table support is omitted from the build. 2153 */ 2154 #ifndef SQLITE_OMIT_VIRTUALTABLE 2155 # define IsVirtual(X) ((X)->nModuleArg) 2156 # define ExprIsVtab(X) \ 2157 ((X)->op==TK_COLUMN && (X)->y.pTab!=0 && (X)->y.pTab->nModuleArg) 2158 #else 2159 # define IsVirtual(X) 0 2160 # define ExprIsVtab(X) 0 2161 #endif 2162 2163 /* 2164 ** Macros to determine if a column is hidden. IsOrdinaryHiddenColumn() 2165 ** only works for non-virtual tables (ordinary tables and views) and is 2166 ** always false unless SQLITE_ENABLE_HIDDEN_COLUMNS is defined. The 2167 ** IsHiddenColumn() macro is general purpose. 2168 */ 2169 #if defined(SQLITE_ENABLE_HIDDEN_COLUMNS) 2170 # define IsHiddenColumn(X) (((X)->colFlags & COLFLAG_HIDDEN)!=0) 2171 # define IsOrdinaryHiddenColumn(X) (((X)->colFlags & COLFLAG_HIDDEN)!=0) 2172 #elif !defined(SQLITE_OMIT_VIRTUALTABLE) 2173 # define IsHiddenColumn(X) (((X)->colFlags & COLFLAG_HIDDEN)!=0) 2174 # define IsOrdinaryHiddenColumn(X) 0 2175 #else 2176 # define IsHiddenColumn(X) 0 2177 # define IsOrdinaryHiddenColumn(X) 0 2178 #endif 2179 2180 2181 /* Does the table have a rowid */ 2182 #define HasRowid(X) (((X)->tabFlags & TF_WithoutRowid)==0) 2183 #define VisibleRowid(X) (((X)->tabFlags & TF_NoVisibleRowid)==0) 2184 2185 /* 2186 ** Each foreign key constraint is an instance of the following structure. 2187 ** 2188 ** A foreign key is associated with two tables. The "from" table is 2189 ** the table that contains the REFERENCES clause that creates the foreign 2190 ** key. The "to" table is the table that is named in the REFERENCES clause. 2191 ** Consider this example: 2192 ** 2193 ** CREATE TABLE ex1( 2194 ** a INTEGER PRIMARY KEY, 2195 ** b INTEGER CONSTRAINT fk1 REFERENCES ex2(x) 2196 ** ); 2197 ** 2198 ** For foreign key "fk1", the from-table is "ex1" and the to-table is "ex2". 2199 ** Equivalent names: 2200 ** 2201 ** from-table == child-table 2202 ** to-table == parent-table 2203 ** 2204 ** Each REFERENCES clause generates an instance of the following structure 2205 ** which is attached to the from-table. The to-table need not exist when 2206 ** the from-table is created. The existence of the to-table is not checked. 2207 ** 2208 ** The list of all parents for child Table X is held at X.pFKey. 2209 ** 2210 ** A list of all children for a table named Z (which might not even exist) 2211 ** is held in Schema.fkeyHash with a hash key of Z. 2212 */ 2213 struct FKey { 2214 Table *pFrom; /* Table containing the REFERENCES clause (aka: Child) */ 2215 FKey *pNextFrom; /* Next FKey with the same in pFrom. Next parent of pFrom */ 2216 char *zTo; /* Name of table that the key points to (aka: Parent) */ 2217 FKey *pNextTo; /* Next with the same zTo. Next child of zTo. */ 2218 FKey *pPrevTo; /* Previous with the same zTo */ 2219 int nCol; /* Number of columns in this key */ 2220 /* EV: R-30323-21917 */ 2221 u8 isDeferred; /* True if constraint checking is deferred till COMMIT */ 2222 u8 aAction[2]; /* ON DELETE and ON UPDATE actions, respectively */ 2223 Trigger *apTrigger[2];/* Triggers for aAction[] actions */ 2224 struct sColMap { /* Mapping of columns in pFrom to columns in zTo */ 2225 int iFrom; /* Index of column in pFrom */ 2226 char *zCol; /* Name of column in zTo. If NULL use PRIMARY KEY */ 2227 } aCol[1]; /* One entry for each of nCol columns */ 2228 }; 2229 2230 /* 2231 ** SQLite supports many different ways to resolve a constraint 2232 ** error. ROLLBACK processing means that a constraint violation 2233 ** causes the operation in process to fail and for the current transaction 2234 ** to be rolled back. ABORT processing means the operation in process 2235 ** fails and any prior changes from that one operation are backed out, 2236 ** but the transaction is not rolled back. FAIL processing means that 2237 ** the operation in progress stops and returns an error code. But prior 2238 ** changes due to the same operation are not backed out and no rollback 2239 ** occurs. IGNORE means that the particular row that caused the constraint 2240 ** error is not inserted or updated. Processing continues and no error 2241 ** is returned. REPLACE means that preexisting database rows that caused 2242 ** a UNIQUE constraint violation are removed so that the new insert or 2243 ** update can proceed. Processing continues and no error is reported. 2244 ** 2245 ** RESTRICT, SETNULL, and CASCADE actions apply only to foreign keys. 2246 ** RESTRICT is the same as ABORT for IMMEDIATE foreign keys and the 2247 ** same as ROLLBACK for DEFERRED keys. SETNULL means that the foreign 2248 ** key is set to NULL. CASCADE means that a DELETE or UPDATE of the 2249 ** referenced table row is propagated into the row that holds the 2250 ** foreign key. 2251 ** 2252 ** The following symbolic values are used to record which type 2253 ** of action to take. 2254 */ 2255 #define OE_None 0 /* There is no constraint to check */ 2256 #define OE_Rollback 1 /* Fail the operation and rollback the transaction */ 2257 #define OE_Abort 2 /* Back out changes but do no rollback transaction */ 2258 #define OE_Fail 3 /* Stop the operation but leave all prior changes */ 2259 #define OE_Ignore 4 /* Ignore the error. Do not do the INSERT or UPDATE */ 2260 #define OE_Replace 5 /* Delete existing record, then do INSERT or UPDATE */ 2261 #define OE_Update 6 /* Process as a DO UPDATE in an upsert */ 2262 #define OE_Restrict 7 /* OE_Abort for IMMEDIATE, OE_Rollback for DEFERRED */ 2263 #define OE_SetNull 8 /* Set the foreign key value to NULL */ 2264 #define OE_SetDflt 9 /* Set the foreign key value to its default */ 2265 #define OE_Cascade 10 /* Cascade the changes */ 2266 #define OE_Default 11 /* Do whatever the default action is */ 2267 2268 2269 /* 2270 ** An instance of the following structure is passed as the first 2271 ** argument to sqlite3VdbeKeyCompare and is used to control the 2272 ** comparison of the two index keys. 2273 ** 2274 ** Note that aSortOrder[] and aColl[] have nField+1 slots. There 2275 ** are nField slots for the columns of an index then one extra slot 2276 ** for the rowid at the end. 2277 */ 2278 struct KeyInfo { 2279 u32 nRef; /* Number of references to this KeyInfo object */ 2280 u8 enc; /* Text encoding - one of the SQLITE_UTF* values */ 2281 u16 nKeyField; /* Number of key columns in the index */ 2282 u16 nAllField; /* Total columns, including key plus others */ 2283 sqlite3 *db; /* The database connection */ 2284 u8 *aSortFlags; /* Sort order for each column. */ 2285 CollSeq *aColl[1]; /* Collating sequence for each term of the key */ 2286 }; 2287 2288 /* 2289 ** Allowed bit values for entries in the KeyInfo.aSortFlags[] array. 2290 */ 2291 #define KEYINFO_ORDER_DESC 0x01 /* DESC sort order */ 2292 #define KEYINFO_ORDER_BIGNULL 0x02 /* NULL is larger than any other value */ 2293 2294 /* 2295 ** This object holds a record which has been parsed out into individual 2296 ** fields, for the purposes of doing a comparison. 2297 ** 2298 ** A record is an object that contains one or more fields of data. 2299 ** Records are used to store the content of a table row and to store 2300 ** the key of an index. A blob encoding of a record is created by 2301 ** the OP_MakeRecord opcode of the VDBE and is disassembled by the 2302 ** OP_Column opcode. 2303 ** 2304 ** An instance of this object serves as a "key" for doing a search on 2305 ** an index b+tree. The goal of the search is to find the entry that 2306 ** is closed to the key described by this object. This object might hold 2307 ** just a prefix of the key. The number of fields is given by 2308 ** pKeyInfo->nField. 2309 ** 2310 ** The r1 and r2 fields are the values to return if this key is less than 2311 ** or greater than a key in the btree, respectively. These are normally 2312 ** -1 and +1 respectively, but might be inverted to +1 and -1 if the b-tree 2313 ** is in DESC order. 2314 ** 2315 ** The key comparison functions actually return default_rc when they find 2316 ** an equals comparison. default_rc can be -1, 0, or +1. If there are 2317 ** multiple entries in the b-tree with the same key (when only looking 2318 ** at the first pKeyInfo->nFields,) then default_rc can be set to -1 to 2319 ** cause the search to find the last match, or +1 to cause the search to 2320 ** find the first match. 2321 ** 2322 ** The key comparison functions will set eqSeen to true if they ever 2323 ** get and equal results when comparing this structure to a b-tree record. 2324 ** When default_rc!=0, the search might end up on the record immediately 2325 ** before the first match or immediately after the last match. The 2326 ** eqSeen field will indicate whether or not an exact match exists in the 2327 ** b-tree. 2328 */ 2329 struct UnpackedRecord { 2330 KeyInfo *pKeyInfo; /* Collation and sort-order information */ 2331 Mem *aMem; /* Values */ 2332 u16 nField; /* Number of entries in apMem[] */ 2333 i8 default_rc; /* Comparison result if keys are equal */ 2334 u8 errCode; /* Error detected by xRecordCompare (CORRUPT or NOMEM) */ 2335 i8 r1; /* Value to return if (lhs < rhs) */ 2336 i8 r2; /* Value to return if (lhs > rhs) */ 2337 u8 eqSeen; /* True if an equality comparison has been seen */ 2338 }; 2339 2340 2341 /* 2342 ** Each SQL index is represented in memory by an 2343 ** instance of the following structure. 2344 ** 2345 ** The columns of the table that are to be indexed are described 2346 ** by the aiColumn[] field of this structure. For example, suppose 2347 ** we have the following table and index: 2348 ** 2349 ** CREATE TABLE Ex1(c1 int, c2 int, c3 text); 2350 ** CREATE INDEX Ex2 ON Ex1(c3,c1); 2351 ** 2352 ** In the Table structure describing Ex1, nCol==3 because there are 2353 ** three columns in the table. In the Index structure describing 2354 ** Ex2, nColumn==2 since 2 of the 3 columns of Ex1 are indexed. 2355 ** The value of aiColumn is {2, 0}. aiColumn[0]==2 because the 2356 ** first column to be indexed (c3) has an index of 2 in Ex1.aCol[]. 2357 ** The second column to be indexed (c1) has an index of 0 in 2358 ** Ex1.aCol[], hence Ex2.aiColumn[1]==0. 2359 ** 2360 ** The Index.onError field determines whether or not the indexed columns 2361 ** must be unique and what to do if they are not. When Index.onError=OE_None, 2362 ** it means this is not a unique index. Otherwise it is a unique index 2363 ** and the value of Index.onError indicate the which conflict resolution 2364 ** algorithm to employ whenever an attempt is made to insert a non-unique 2365 ** element. 2366 ** 2367 ** While parsing a CREATE TABLE or CREATE INDEX statement in order to 2368 ** generate VDBE code (as opposed to parsing one read from an sqlite_master 2369 ** table as part of parsing an existing database schema), transient instances 2370 ** of this structure may be created. In this case the Index.tnum variable is 2371 ** used to store the address of a VDBE instruction, not a database page 2372 ** number (it cannot - the database page is not allocated until the VDBE 2373 ** program is executed). See convertToWithoutRowidTable() for details. 2374 */ 2375 struct Index { 2376 char *zName; /* Name of this index */ 2377 i16 *aiColumn; /* Which columns are used by this index. 1st is 0 */ 2378 LogEst *aiRowLogEst; /* From ANALYZE: Est. rows selected by each column */ 2379 Table *pTable; /* The SQL table being indexed */ 2380 char *zColAff; /* String defining the affinity of each column */ 2381 Index *pNext; /* The next index associated with the same table */ 2382 Schema *pSchema; /* Schema containing this index */ 2383 u8 *aSortOrder; /* for each column: True==DESC, False==ASC */ 2384 const char **azColl; /* Array of collation sequence names for index */ 2385 Expr *pPartIdxWhere; /* WHERE clause for partial indices */ 2386 ExprList *aColExpr; /* Column expressions */ 2387 int tnum; /* DB Page containing root of this index */ 2388 LogEst szIdxRow; /* Estimated average row size in bytes */ 2389 u16 nKeyCol; /* Number of columns forming the key */ 2390 u16 nColumn; /* Number of columns stored in the index */ 2391 u8 onError; /* OE_Abort, OE_Ignore, OE_Replace, or OE_None */ 2392 unsigned idxType:2; /* 0:Normal 1:UNIQUE, 2:PRIMARY KEY, 3:IPK */ 2393 unsigned bUnordered:1; /* Use this index for == or IN queries only */ 2394 unsigned uniqNotNull:1; /* True if UNIQUE and NOT NULL for all columns */ 2395 unsigned isResized:1; /* True if resizeIndexObject() has been called */ 2396 unsigned isCovering:1; /* True if this is a covering index */ 2397 unsigned noSkipScan:1; /* Do not try to use skip-scan if true */ 2398 unsigned hasStat1:1; /* aiRowLogEst values come from sqlite_stat1 */ 2399 unsigned bNoQuery:1; /* Do not use this index to optimize queries */ 2400 unsigned bAscKeyBug:1; /* True if the bba7b69f9849b5bf bug applies */ 2401 unsigned bHasVCol:1; /* Index references one or more VIRTUAL columns */ 2402 #ifdef SQLITE_ENABLE_STAT4 2403 int nSample; /* Number of elements in aSample[] */ 2404 int nSampleCol; /* Size of IndexSample.anEq[] and so on */ 2405 tRowcnt *aAvgEq; /* Average nEq values for keys not in aSample */ 2406 IndexSample *aSample; /* Samples of the left-most key */ 2407 tRowcnt *aiRowEst; /* Non-logarithmic stat1 data for this index */ 2408 tRowcnt nRowEst0; /* Non-logarithmic number of rows in the index */ 2409 #endif 2410 Bitmask colNotIdxed; /* 0 for unindexed columns in pTab */ 2411 }; 2412 2413 /* 2414 ** Allowed values for Index.idxType 2415 */ 2416 #define SQLITE_IDXTYPE_APPDEF 0 /* Created using CREATE INDEX */ 2417 #define SQLITE_IDXTYPE_UNIQUE 1 /* Implements a UNIQUE constraint */ 2418 #define SQLITE_IDXTYPE_PRIMARYKEY 2 /* Is the PRIMARY KEY for the table */ 2419 #define SQLITE_IDXTYPE_IPK 3 /* INTEGER PRIMARY KEY index */ 2420 2421 /* Return true if index X is a PRIMARY KEY index */ 2422 #define IsPrimaryKeyIndex(X) ((X)->idxType==SQLITE_IDXTYPE_PRIMARYKEY) 2423 2424 /* Return true if index X is a UNIQUE index */ 2425 #define IsUniqueIndex(X) ((X)->onError!=OE_None) 2426 2427 /* The Index.aiColumn[] values are normally positive integer. But 2428 ** there are some negative values that have special meaning: 2429 */ 2430 #define XN_ROWID (-1) /* Indexed column is the rowid */ 2431 #define XN_EXPR (-2) /* Indexed column is an expression */ 2432 2433 /* 2434 ** Each sample stored in the sqlite_stat4 table is represented in memory 2435 ** using a structure of this type. See documentation at the top of the 2436 ** analyze.c source file for additional information. 2437 */ 2438 struct IndexSample { 2439 void *p; /* Pointer to sampled record */ 2440 int n; /* Size of record in bytes */ 2441 tRowcnt *anEq; /* Est. number of rows where the key equals this sample */ 2442 tRowcnt *anLt; /* Est. number of rows where key is less than this sample */ 2443 tRowcnt *anDLt; /* Est. number of distinct keys less than this sample */ 2444 }; 2445 2446 /* 2447 ** Possible values to use within the flags argument to sqlite3GetToken(). 2448 */ 2449 #define SQLITE_TOKEN_QUOTED 0x1 /* Token is a quoted identifier. */ 2450 #define SQLITE_TOKEN_KEYWORD 0x2 /* Token is a keyword. */ 2451 2452 /* 2453 ** Each token coming out of the lexer is an instance of 2454 ** this structure. Tokens are also used as part of an expression. 2455 ** 2456 ** The memory that "z" points to is owned by other objects. Take care 2457 ** that the owner of the "z" string does not deallocate the string before 2458 ** the Token goes out of scope! Very often, the "z" points to some place 2459 ** in the middle of the Parse.zSql text. But it might also point to a 2460 ** static string. 2461 */ 2462 struct Token { 2463 const char *z; /* Text of the token. Not NULL-terminated! */ 2464 unsigned int n; /* Number of characters in this token */ 2465 }; 2466 2467 /* 2468 ** An instance of this structure contains information needed to generate 2469 ** code for a SELECT that contains aggregate functions. 2470 ** 2471 ** If Expr.op==TK_AGG_COLUMN or TK_AGG_FUNCTION then Expr.pAggInfo is a 2472 ** pointer to this structure. The Expr.iColumn field is the index in 2473 ** AggInfo.aCol[] or AggInfo.aFunc[] of information needed to generate 2474 ** code for that node. 2475 ** 2476 ** AggInfo.pGroupBy and AggInfo.aFunc.pExpr point to fields within the 2477 ** original Select structure that describes the SELECT statement. These 2478 ** fields do not need to be freed when deallocating the AggInfo structure. 2479 */ 2480 struct AggInfo { 2481 u8 directMode; /* Direct rendering mode means take data directly 2482 ** from source tables rather than from accumulators */ 2483 u8 useSortingIdx; /* In direct mode, reference the sorting index rather 2484 ** than the source table */ 2485 int sortingIdx; /* Cursor number of the sorting index */ 2486 int sortingIdxPTab; /* Cursor number of pseudo-table */ 2487 int nSortingColumn; /* Number of columns in the sorting index */ 2488 int mnReg, mxReg; /* Range of registers allocated for aCol and aFunc */ 2489 ExprList *pGroupBy; /* The group by clause */ 2490 struct AggInfo_col { /* For each column used in source tables */ 2491 Table *pTab; /* Source table */ 2492 int iTable; /* Cursor number of the source table */ 2493 int iColumn; /* Column number within the source table */ 2494 int iSorterColumn; /* Column number in the sorting index */ 2495 int iMem; /* Memory location that acts as accumulator */ 2496 Expr *pExpr; /* The original expression */ 2497 } *aCol; 2498 int nColumn; /* Number of used entries in aCol[] */ 2499 int nAccumulator; /* Number of columns that show through to the output. 2500 ** Additional columns are used only as parameters to 2501 ** aggregate functions */ 2502 struct AggInfo_func { /* For each aggregate function */ 2503 Expr *pExpr; /* Expression encoding the function */ 2504 FuncDef *pFunc; /* The aggregate function implementation */ 2505 int iMem; /* Memory location that acts as accumulator */ 2506 int iDistinct; /* Ephemeral table used to enforce DISTINCT */ 2507 } *aFunc; 2508 int nFunc; /* Number of entries in aFunc[] */ 2509 }; 2510 2511 /* 2512 ** The datatype ynVar is a signed integer, either 16-bit or 32-bit. 2513 ** Usually it is 16-bits. But if SQLITE_MAX_VARIABLE_NUMBER is greater 2514 ** than 32767 we have to make it 32-bit. 16-bit is preferred because 2515 ** it uses less memory in the Expr object, which is a big memory user 2516 ** in systems with lots of prepared statements. And few applications 2517 ** need more than about 10 or 20 variables. But some extreme users want 2518 ** to have prepared statements with over 32766 variables, and for them 2519 ** the option is available (at compile-time). 2520 */ 2521 #if SQLITE_MAX_VARIABLE_NUMBER<32767 2522 typedef i16 ynVar; 2523 #else 2524 typedef int ynVar; 2525 #endif 2526 2527 /* 2528 ** Each node of an expression in the parse tree is an instance 2529 ** of this structure. 2530 ** 2531 ** Expr.op is the opcode. The integer parser token codes are reused 2532 ** as opcodes here. For example, the parser defines TK_GE to be an integer 2533 ** code representing the ">=" operator. This same integer code is reused 2534 ** to represent the greater-than-or-equal-to operator in the expression 2535 ** tree. 2536 ** 2537 ** If the expression is an SQL literal (TK_INTEGER, TK_FLOAT, TK_BLOB, 2538 ** or TK_STRING), then Expr.token contains the text of the SQL literal. If 2539 ** the expression is a variable (TK_VARIABLE), then Expr.token contains the 2540 ** variable name. Finally, if the expression is an SQL function (TK_FUNCTION), 2541 ** then Expr.token contains the name of the function. 2542 ** 2543 ** Expr.pRight and Expr.pLeft are the left and right subexpressions of a 2544 ** binary operator. Either or both may be NULL. 2545 ** 2546 ** Expr.x.pList is a list of arguments if the expression is an SQL function, 2547 ** a CASE expression or an IN expression of the form "<lhs> IN (<y>, <z>...)". 2548 ** Expr.x.pSelect is used if the expression is a sub-select or an expression of 2549 ** the form "<lhs> IN (SELECT ...)". If the EP_xIsSelect bit is set in the 2550 ** Expr.flags mask, then Expr.x.pSelect is valid. Otherwise, Expr.x.pList is 2551 ** valid. 2552 ** 2553 ** An expression of the form ID or ID.ID refers to a column in a table. 2554 ** For such expressions, Expr.op is set to TK_COLUMN and Expr.iTable is 2555 ** the integer cursor number of a VDBE cursor pointing to that table and 2556 ** Expr.iColumn is the column number for the specific column. If the 2557 ** expression is used as a result in an aggregate SELECT, then the 2558 ** value is also stored in the Expr.iAgg column in the aggregate so that 2559 ** it can be accessed after all aggregates are computed. 2560 ** 2561 ** If the expression is an unbound variable marker (a question mark 2562 ** character '?' in the original SQL) then the Expr.iTable holds the index 2563 ** number for that variable. 2564 ** 2565 ** If the expression is a subquery then Expr.iColumn holds an integer 2566 ** register number containing the result of the subquery. If the 2567 ** subquery gives a constant result, then iTable is -1. If the subquery 2568 ** gives a different answer at different times during statement processing 2569 ** then iTable is the address of a subroutine that computes the subquery. 2570 ** 2571 ** If the Expr is of type OP_Column, and the table it is selecting from 2572 ** is a disk table or the "old.*" pseudo-table, then pTab points to the 2573 ** corresponding table definition. 2574 ** 2575 ** ALLOCATION NOTES: 2576 ** 2577 ** Expr objects can use a lot of memory space in database schema. To 2578 ** help reduce memory requirements, sometimes an Expr object will be 2579 ** truncated. And to reduce the number of memory allocations, sometimes 2580 ** two or more Expr objects will be stored in a single memory allocation, 2581 ** together with Expr.zToken strings. 2582 ** 2583 ** If the EP_Reduced and EP_TokenOnly flags are set when 2584 ** an Expr object is truncated. When EP_Reduced is set, then all 2585 ** the child Expr objects in the Expr.pLeft and Expr.pRight subtrees 2586 ** are contained within the same memory allocation. Note, however, that 2587 ** the subtrees in Expr.x.pList or Expr.x.pSelect are always separately 2588 ** allocated, regardless of whether or not EP_Reduced is set. 2589 */ 2590 struct Expr { 2591 u8 op; /* Operation performed by this node */ 2592 char affExpr; /* affinity, or RAISE type */ 2593 u8 op2; /* TK_REGISTER/TK_TRUTH: original value of Expr.op 2594 ** TK_COLUMN: the value of p5 for OP_Column 2595 ** TK_AGG_FUNCTION: nesting depth 2596 ** TK_FUNCTION: NC_SelfRef flag if needs OP_PureFunc */ 2597 #ifdef SQLITE_DEBUG 2598 u8 vvaFlags; /* Verification flags. */ 2599 #endif 2600 u32 flags; /* Various flags. EP_* See below */ 2601 union { 2602 char *zToken; /* Token value. Zero terminated and dequoted */ 2603 int iValue; /* Non-negative integer value if EP_IntValue */ 2604 } u; 2605 2606 /* If the EP_TokenOnly flag is set in the Expr.flags mask, then no 2607 ** space is allocated for the fields below this point. An attempt to 2608 ** access them will result in a segfault or malfunction. 2609 *********************************************************************/ 2610 2611 Expr *pLeft; /* Left subnode */ 2612 Expr *pRight; /* Right subnode */ 2613 union { 2614 ExprList *pList; /* op = IN, EXISTS, SELECT, CASE, FUNCTION, BETWEEN */ 2615 Select *pSelect; /* EP_xIsSelect and op = IN, EXISTS, SELECT */ 2616 } x; 2617 2618 /* If the EP_Reduced flag is set in the Expr.flags mask, then no 2619 ** space is allocated for the fields below this point. An attempt to 2620 ** access them will result in a segfault or malfunction. 2621 *********************************************************************/ 2622 2623 #if SQLITE_MAX_EXPR_DEPTH>0 2624 int nHeight; /* Height of the tree headed by this node */ 2625 #endif 2626 int iTable; /* TK_COLUMN: cursor number of table holding column 2627 ** TK_REGISTER: register number 2628 ** TK_TRIGGER: 1 -> new, 0 -> old 2629 ** EP_Unlikely: 134217728 times likelihood 2630 ** TK_IN: ephemerial table holding RHS 2631 ** TK_SELECT_COLUMN: Number of columns on the LHS 2632 ** TK_SELECT: 1st register of result vector */ 2633 ynVar iColumn; /* TK_COLUMN: column index. -1 for rowid. 2634 ** TK_VARIABLE: variable number (always >= 1). 2635 ** TK_SELECT_COLUMN: column of the result vector */ 2636 i16 iAgg; /* Which entry in pAggInfo->aCol[] or ->aFunc[] */ 2637 i16 iRightJoinTable; /* If EP_FromJoin, the right table of the join */ 2638 AggInfo *pAggInfo; /* Used by TK_AGG_COLUMN and TK_AGG_FUNCTION */ 2639 union { 2640 Table *pTab; /* TK_COLUMN: Table containing column. Can be NULL 2641 ** for a column of an index on an expression */ 2642 Window *pWin; /* EP_WinFunc: Window/Filter defn for a function */ 2643 struct { /* TK_IN, TK_SELECT, and TK_EXISTS */ 2644 int iAddr; /* Subroutine entry address */ 2645 int regReturn; /* Register used to hold return address */ 2646 } sub; 2647 } y; 2648 }; 2649 2650 /* 2651 ** The following are the meanings of bits in the Expr.flags field. 2652 ** Value restrictions: 2653 ** 2654 ** EP_Agg == NC_HasAgg == SF_HasAgg 2655 ** EP_Win == NC_HasWin 2656 */ 2657 #define EP_FromJoin 0x000001 /* Originates in ON/USING clause of outer join */ 2658 #define EP_Distinct 0x000002 /* Aggregate function with DISTINCT keyword */ 2659 #define EP_HasFunc 0x000004 /* Contains one or more functions of any kind */ 2660 #define EP_FixedCol 0x000008 /* TK_Column with a known fixed value */ 2661 #define EP_Agg 0x000010 /* Contains one or more aggregate functions */ 2662 #define EP_VarSelect 0x000020 /* pSelect is correlated, not constant */ 2663 #define EP_DblQuoted 0x000040 /* token.z was originally in "..." */ 2664 #define EP_InfixFunc 0x000080 /* True for an infix function: LIKE, GLOB, etc */ 2665 #define EP_Collate 0x000100 /* Tree contains a TK_COLLATE operator */ 2666 #define EP_Commuted 0x000200 /* Comparison operator has been commuted */ 2667 #define EP_IntValue 0x000400 /* Integer value contained in u.iValue */ 2668 #define EP_xIsSelect 0x000800 /* x.pSelect is valid (otherwise x.pList is) */ 2669 #define EP_Skip 0x001000 /* Operator does not contribute to affinity */ 2670 #define EP_Reduced 0x002000 /* Expr struct EXPR_REDUCEDSIZE bytes only */ 2671 #define EP_TokenOnly 0x004000 /* Expr struct EXPR_TOKENONLYSIZE bytes only */ 2672 #define EP_Win 0x008000 /* Contains window functions */ 2673 #define EP_MemToken 0x010000 /* Need to sqlite3DbFree() Expr.zToken */ 2674 /* 0x020000 // available for reuse */ 2675 #define EP_Unlikely 0x040000 /* unlikely() or likelihood() function */ 2676 #define EP_ConstFunc 0x080000 /* A SQLITE_FUNC_CONSTANT or _SLOCHNG function */ 2677 #define EP_CanBeNull 0x100000 /* Can be null despite NOT NULL constraint */ 2678 #define EP_Subquery 0x200000 /* Tree contains a TK_SELECT operator */ 2679 #define EP_Alias 0x400000 /* Is an alias for a result set column */ 2680 #define EP_Leaf 0x800000 /* Expr.pLeft, .pRight, .u.pSelect all NULL */ 2681 #define EP_WinFunc 0x1000000 /* TK_FUNCTION with Expr.y.pWin set */ 2682 #define EP_Subrtn 0x2000000 /* Uses Expr.y.sub. TK_IN, _SELECT, or _EXISTS */ 2683 #define EP_Quoted 0x4000000 /* TK_ID was originally quoted */ 2684 #define EP_Static 0x8000000 /* Held in memory not obtained from malloc() */ 2685 #define EP_IsTrue 0x10000000 /* Always has boolean value of TRUE */ 2686 #define EP_IsFalse 0x20000000 /* Always has boolean value of FALSE */ 2687 #define EP_FromDDL 0x40000000 /* Originates from sqlite_master */ 2688 /* 0x80000000 // Available */ 2689 2690 /* 2691 ** The EP_Propagate mask is a set of properties that automatically propagate 2692 ** upwards into parent nodes. 2693 */ 2694 #define EP_Propagate (EP_Collate|EP_Subquery|EP_HasFunc) 2695 2696 /* 2697 ** These macros can be used to test, set, or clear bits in the 2698 ** Expr.flags field. 2699 */ 2700 #define ExprHasProperty(E,P) (((E)->flags&(P))!=0) 2701 #define ExprHasAllProperty(E,P) (((E)->flags&(P))==(P)) 2702 #define ExprSetProperty(E,P) (E)->flags|=(P) 2703 #define ExprClearProperty(E,P) (E)->flags&=~(P) 2704 #define ExprAlwaysTrue(E) (((E)->flags&(EP_FromJoin|EP_IsTrue))==EP_IsTrue) 2705 #define ExprAlwaysFalse(E) (((E)->flags&(EP_FromJoin|EP_IsFalse))==EP_IsFalse) 2706 2707 2708 /* Flags for use with Expr.vvaFlags 2709 */ 2710 #define EP_NoReduce 0x01 /* Cannot EXPRDUP_REDUCE this Expr */ 2711 #define EP_Immutable 0x02 /* Do not change this Expr node */ 2712 2713 /* The ExprSetVVAProperty() macro is used for Verification, Validation, 2714 ** and Accreditation only. It works like ExprSetProperty() during VVA 2715 ** processes but is a no-op for delivery. 2716 */ 2717 #ifdef SQLITE_DEBUG 2718 # define ExprSetVVAProperty(E,P) (E)->vvaFlags|=(P) 2719 # define ExprHasVVAProperty(E,P) (((E)->vvaFlags&(P))!=0) 2720 # define ExprClearVVAProperties(E) (E)->vvaFlags = 0 2721 #else 2722 # define ExprSetVVAProperty(E,P) 2723 # define ExprHasVVAProperty(E,P) 0 2724 # define ExprClearVVAProperties(E) 2725 #endif 2726 2727 /* 2728 ** Macros to determine the number of bytes required by a normal Expr 2729 ** struct, an Expr struct with the EP_Reduced flag set in Expr.flags 2730 ** and an Expr struct with the EP_TokenOnly flag set. 2731 */ 2732 #define EXPR_FULLSIZE sizeof(Expr) /* Full size */ 2733 #define EXPR_REDUCEDSIZE offsetof(Expr,iTable) /* Common features */ 2734 #define EXPR_TOKENONLYSIZE offsetof(Expr,pLeft) /* Fewer features */ 2735 2736 /* 2737 ** Flags passed to the sqlite3ExprDup() function. See the header comment 2738 ** above sqlite3ExprDup() for details. 2739 */ 2740 #define EXPRDUP_REDUCE 0x0001 /* Used reduced-size Expr nodes */ 2741 2742 /* 2743 ** True if the expression passed as an argument was a function with 2744 ** an OVER() clause (a window function). 2745 */ 2746 #ifdef SQLITE_OMIT_WINDOWFUNC 2747 # define IsWindowFunc(p) 0 2748 #else 2749 # define IsWindowFunc(p) ( \ 2750 ExprHasProperty((p), EP_WinFunc) && p->y.pWin->eFrmType!=TK_FILTER \ 2751 ) 2752 #endif 2753 2754 /* 2755 ** A list of expressions. Each expression may optionally have a 2756 ** name. An expr/name combination can be used in several ways, such 2757 ** as the list of "expr AS ID" fields following a "SELECT" or in the 2758 ** list of "ID = expr" items in an UPDATE. A list of expressions can 2759 ** also be used as the argument to a function, in which case the a.zName 2760 ** field is not used. 2761 ** 2762 ** In order to try to keep memory usage down, the Expr.a.zEName field 2763 ** is used for multiple purposes: 2764 ** 2765 ** eEName Usage 2766 ** ---------- ------------------------- 2767 ** ENAME_NAME (1) the AS of result set column 2768 ** (2) COLUMN= of an UPDATE 2769 ** 2770 ** ENAME_TAB DB.TABLE.NAME used to resolve names 2771 ** of subqueries 2772 ** 2773 ** ENAME_SPAN Text of the original result set 2774 ** expression. 2775 */ 2776 struct ExprList { 2777 int nExpr; /* Number of expressions on the list */ 2778 struct ExprList_item { /* For each expression in the list */ 2779 Expr *pExpr; /* The parse tree for this expression */ 2780 char *zEName; /* Token associated with this expression */ 2781 u8 sortFlags; /* Mask of KEYINFO_ORDER_* flags */ 2782 unsigned eEName :2; /* Meaning of zEName */ 2783 unsigned done :1; /* A flag to indicate when processing is finished */ 2784 unsigned reusable :1; /* Constant expression is reusable */ 2785 unsigned bSorterRef :1; /* Defer evaluation until after sorting */ 2786 unsigned bNulls: 1; /* True if explicit "NULLS FIRST/LAST" */ 2787 union { 2788 struct { 2789 u16 iOrderByCol; /* For ORDER BY, column number in result set */ 2790 u16 iAlias; /* Index into Parse.aAlias[] for zName */ 2791 } x; 2792 int iConstExprReg; /* Register in which Expr value is cached */ 2793 } u; 2794 } a[1]; /* One slot for each expression in the list */ 2795 }; 2796 2797 /* 2798 ** Allowed values for Expr.a.eEName 2799 */ 2800 #define ENAME_NAME 0 /* The AS clause of a result set */ 2801 #define ENAME_SPAN 1 /* Complete text of the result set expression */ 2802 #define ENAME_TAB 2 /* "DB.TABLE.NAME" for the result set */ 2803 2804 /* 2805 ** An instance of this structure can hold a simple list of identifiers, 2806 ** such as the list "a,b,c" in the following statements: 2807 ** 2808 ** INSERT INTO t(a,b,c) VALUES ...; 2809 ** CREATE INDEX idx ON t(a,b,c); 2810 ** CREATE TRIGGER trig BEFORE UPDATE ON t(a,b,c) ...; 2811 ** 2812 ** The IdList.a.idx field is used when the IdList represents the list of 2813 ** column names after a table name in an INSERT statement. In the statement 2814 ** 2815 ** INSERT INTO t(a,b,c) ... 2816 ** 2817 ** If "a" is the k-th column of table "t", then IdList.a[0].idx==k. 2818 */ 2819 struct IdList { 2820 struct IdList_item { 2821 char *zName; /* Name of the identifier */ 2822 int idx; /* Index in some Table.aCol[] of a column named zName */ 2823 } *a; 2824 int nId; /* Number of identifiers on the list */ 2825 }; 2826 2827 /* 2828 ** The following structure describes the FROM clause of a SELECT statement. 2829 ** Each table or subquery in the FROM clause is a separate element of 2830 ** the SrcList.a[] array. 2831 ** 2832 ** With the addition of multiple database support, the following structure 2833 ** can also be used to describe a particular table such as the table that 2834 ** is modified by an INSERT, DELETE, or UPDATE statement. In standard SQL, 2835 ** such a table must be a simple name: ID. But in SQLite, the table can 2836 ** now be identified by a database name, a dot, then the table name: ID.ID. 2837 ** 2838 ** The jointype starts out showing the join type between the current table 2839 ** and the next table on the list. The parser builds the list this way. 2840 ** But sqlite3SrcListShiftJoinType() later shifts the jointypes so that each 2841 ** jointype expresses the join between the table and the previous table. 2842 ** 2843 ** In the colUsed field, the high-order bit (bit 63) is set if the table 2844 ** contains more than 63 columns and the 64-th or later column is used. 2845 */ 2846 struct SrcList { 2847 int nSrc; /* Number of tables or subqueries in the FROM clause */ 2848 u32 nAlloc; /* Number of entries allocated in a[] below */ 2849 struct SrcList_item { 2850 Schema *pSchema; /* Schema to which this item is fixed */ 2851 char *zDatabase; /* Name of database holding this table */ 2852 char *zName; /* Name of the table */ 2853 char *zAlias; /* The "B" part of a "A AS B" phrase. zName is the "A" */ 2854 Table *pTab; /* An SQL table corresponding to zName */ 2855 Select *pSelect; /* A SELECT statement used in place of a table name */ 2856 int addrFillSub; /* Address of subroutine to manifest a subquery */ 2857 int regReturn; /* Register holding return address of addrFillSub */ 2858 int regResult; /* Registers holding results of a co-routine */ 2859 struct { 2860 u8 jointype; /* Type of join between this table and the previous */ 2861 unsigned notIndexed :1; /* True if there is a NOT INDEXED clause */ 2862 unsigned isIndexedBy :1; /* True if there is an INDEXED BY clause */ 2863 unsigned isTabFunc :1; /* True if table-valued-function syntax */ 2864 unsigned isCorrelated :1; /* True if sub-query is correlated */ 2865 unsigned viaCoroutine :1; /* Implemented as a co-routine */ 2866 unsigned isRecursive :1; /* True for recursive reference in WITH */ 2867 unsigned fromDDL :1; /* Comes from sqlite_master */ 2868 } fg; 2869 int iCursor; /* The VDBE cursor number used to access this table */ 2870 Expr *pOn; /* The ON clause of a join */ 2871 IdList *pUsing; /* The USING clause of a join */ 2872 Bitmask colUsed; /* Bit N (1<<N) set if column N of pTab is used */ 2873 union { 2874 char *zIndexedBy; /* Identifier from "INDEXED BY <zIndex>" clause */ 2875 ExprList *pFuncArg; /* Arguments to table-valued-function */ 2876 } u1; 2877 Index *pIBIndex; /* Index structure corresponding to u1.zIndexedBy */ 2878 } a[1]; /* One entry for each identifier on the list */ 2879 }; 2880 2881 /* 2882 ** Permitted values of the SrcList.a.jointype field 2883 */ 2884 #define JT_INNER 0x0001 /* Any kind of inner or cross join */ 2885 #define JT_CROSS 0x0002 /* Explicit use of the CROSS keyword */ 2886 #define JT_NATURAL 0x0004 /* True for a "natural" join */ 2887 #define JT_LEFT 0x0008 /* Left outer join */ 2888 #define JT_RIGHT 0x0010 /* Right outer join */ 2889 #define JT_OUTER 0x0020 /* The "OUTER" keyword is present */ 2890 #define JT_ERROR 0x0040 /* unknown or unsupported join type */ 2891 2892 2893 /* 2894 ** Flags appropriate for the wctrlFlags parameter of sqlite3WhereBegin() 2895 ** and the WhereInfo.wctrlFlags member. 2896 ** 2897 ** Value constraints (enforced via assert()): 2898 ** WHERE_USE_LIMIT == SF_FixedLimit 2899 */ 2900 #define WHERE_ORDERBY_NORMAL 0x0000 /* No-op */ 2901 #define WHERE_ORDERBY_MIN 0x0001 /* ORDER BY processing for min() func */ 2902 #define WHERE_ORDERBY_MAX 0x0002 /* ORDER BY processing for max() func */ 2903 #define WHERE_ONEPASS_DESIRED 0x0004 /* Want to do one-pass UPDATE/DELETE */ 2904 #define WHERE_ONEPASS_MULTIROW 0x0008 /* ONEPASS is ok with multiple rows */ 2905 #define WHERE_DUPLICATES_OK 0x0010 /* Ok to return a row more than once */ 2906 #define WHERE_OR_SUBCLAUSE 0x0020 /* Processing a sub-WHERE as part of 2907 ** the OR optimization */ 2908 #define WHERE_GROUPBY 0x0040 /* pOrderBy is really a GROUP BY */ 2909 #define WHERE_DISTINCTBY 0x0080 /* pOrderby is really a DISTINCT clause */ 2910 #define WHERE_WANT_DISTINCT 0x0100 /* All output needs to be distinct */ 2911 #define WHERE_SORTBYGROUP 0x0200 /* Support sqlite3WhereIsSorted() */ 2912 #define WHERE_SEEK_TABLE 0x0400 /* Do not defer seeks on main table */ 2913 #define WHERE_ORDERBY_LIMIT 0x0800 /* ORDERBY+LIMIT on the inner loop */ 2914 #define WHERE_SEEK_UNIQ_TABLE 0x1000 /* Do not defer seeks if unique */ 2915 /* 0x2000 not currently used */ 2916 #define WHERE_USE_LIMIT 0x4000 /* Use the LIMIT in cost estimates */ 2917 /* 0x8000 not currently used */ 2918 2919 /* Allowed return values from sqlite3WhereIsDistinct() 2920 */ 2921 #define WHERE_DISTINCT_NOOP 0 /* DISTINCT keyword not used */ 2922 #define WHERE_DISTINCT_UNIQUE 1 /* No duplicates */ 2923 #define WHERE_DISTINCT_ORDERED 2 /* All duplicates are adjacent */ 2924 #define WHERE_DISTINCT_UNORDERED 3 /* Duplicates are scattered */ 2925 2926 /* 2927 ** A NameContext defines a context in which to resolve table and column 2928 ** names. The context consists of a list of tables (the pSrcList) field and 2929 ** a list of named expression (pEList). The named expression list may 2930 ** be NULL. The pSrc corresponds to the FROM clause of a SELECT or 2931 ** to the table being operated on by INSERT, UPDATE, or DELETE. The 2932 ** pEList corresponds to the result set of a SELECT and is NULL for 2933 ** other statements. 2934 ** 2935 ** NameContexts can be nested. When resolving names, the inner-most 2936 ** context is searched first. If no match is found, the next outer 2937 ** context is checked. If there is still no match, the next context 2938 ** is checked. This process continues until either a match is found 2939 ** or all contexts are check. When a match is found, the nRef member of 2940 ** the context containing the match is incremented. 2941 ** 2942 ** Each subquery gets a new NameContext. The pNext field points to the 2943 ** NameContext in the parent query. Thus the process of scanning the 2944 ** NameContext list corresponds to searching through successively outer 2945 ** subqueries looking for a match. 2946 */ 2947 struct NameContext { 2948 Parse *pParse; /* The parser */ 2949 SrcList *pSrcList; /* One or more tables used to resolve names */ 2950 union { 2951 ExprList *pEList; /* Optional list of result-set columns */ 2952 AggInfo *pAggInfo; /* Information about aggregates at this level */ 2953 Upsert *pUpsert; /* ON CONFLICT clause information from an upsert */ 2954 } uNC; 2955 NameContext *pNext; /* Next outer name context. NULL for outermost */ 2956 int nRef; /* Number of names resolved by this context */ 2957 int nErr; /* Number of errors encountered while resolving names */ 2958 int ncFlags; /* Zero or more NC_* flags defined below */ 2959 Select *pWinSelect; /* SELECT statement for any window functions */ 2960 }; 2961 2962 /* 2963 ** Allowed values for the NameContext, ncFlags field. 2964 ** 2965 ** Value constraints (all checked via assert()): 2966 ** NC_HasAgg == SF_HasAgg == EP_Agg 2967 ** NC_MinMaxAgg == SF_MinMaxAgg == SQLITE_FUNC_MINMAX 2968 ** NC_HasWin == EP_Win 2969 ** 2970 */ 2971 #define NC_AllowAgg 0x00001 /* Aggregate functions are allowed here */ 2972 #define NC_PartIdx 0x00002 /* True if resolving a partial index WHERE */ 2973 #define NC_IsCheck 0x00004 /* True if resolving a CHECK constraint */ 2974 #define NC_GenCol 0x00008 /* True for a GENERATED ALWAYS AS clause */ 2975 #define NC_HasAgg 0x00010 /* One or more aggregate functions seen */ 2976 #define NC_IdxExpr 0x00020 /* True if resolving columns of CREATE INDEX */ 2977 #define NC_SelfRef 0x0002e /* Combo: PartIdx, isCheck, GenCol, and IdxExpr */ 2978 #define NC_VarSelect 0x00040 /* A correlated subquery has been seen */ 2979 #define NC_UEList 0x00080 /* True if uNC.pEList is used */ 2980 #define NC_UAggInfo 0x00100 /* True if uNC.pAggInfo is used */ 2981 #define NC_UUpsert 0x00200 /* True if uNC.pUpsert is used */ 2982 #define NC_MinMaxAgg 0x01000 /* min/max aggregates seen. See note above */ 2983 #define NC_Complex 0x02000 /* True if a function or subquery seen */ 2984 #define NC_AllowWin 0x04000 /* Window functions are allowed here */ 2985 #define NC_HasWin 0x08000 /* One or more window functions seen */ 2986 #define NC_IsDDL 0x10000 /* Resolving names in a CREATE statement */ 2987 #define NC_InAggFunc 0x20000 /* True if analyzing arguments to an agg func */ 2988 #define NC_FromDDL 0x40000 /* SQL text comes from sqlite_master */ 2989 2990 /* 2991 ** An instance of the following object describes a single ON CONFLICT 2992 ** clause in an upsert. 2993 ** 2994 ** The pUpsertTarget field is only set if the ON CONFLICT clause includes 2995 ** conflict-target clause. (In "ON CONFLICT(a,b)" the "(a,b)" is the 2996 ** conflict-target clause.) The pUpsertTargetWhere is the optional 2997 ** WHERE clause used to identify partial unique indexes. 2998 ** 2999 ** pUpsertSet is the list of column=expr terms of the UPDATE statement. 3000 ** The pUpsertSet field is NULL for a ON CONFLICT DO NOTHING. The 3001 ** pUpsertWhere is the WHERE clause for the UPDATE and is NULL if the 3002 ** WHERE clause is omitted. 3003 */ 3004 struct Upsert { 3005 ExprList *pUpsertTarget; /* Optional description of conflicting index */ 3006 Expr *pUpsertTargetWhere; /* WHERE clause for partial index targets */ 3007 ExprList *pUpsertSet; /* The SET clause from an ON CONFLICT UPDATE */ 3008 Expr *pUpsertWhere; /* WHERE clause for the ON CONFLICT UPDATE */ 3009 /* The fields above comprise the parse tree for the upsert clause. 3010 ** The fields below are used to transfer information from the INSERT 3011 ** processing down into the UPDATE processing while generating code. 3012 ** Upsert owns the memory allocated above, but not the memory below. */ 3013 Index *pUpsertIdx; /* Constraint that pUpsertTarget identifies */ 3014 SrcList *pUpsertSrc; /* Table to be updated */ 3015 int regData; /* First register holding array of VALUES */ 3016 int iDataCur; /* Index of the data cursor */ 3017 int iIdxCur; /* Index of the first index cursor */ 3018 }; 3019 3020 /* 3021 ** An instance of the following structure contains all information 3022 ** needed to generate code for a single SELECT statement. 3023 ** 3024 ** See the header comment on the computeLimitRegisters() routine for a 3025 ** detailed description of the meaning of the iLimit and iOffset fields. 3026 ** 3027 ** addrOpenEphm[] entries contain the address of OP_OpenEphemeral opcodes. 3028 ** These addresses must be stored so that we can go back and fill in 3029 ** the P4_KEYINFO and P2 parameters later. Neither the KeyInfo nor 3030 ** the number of columns in P2 can be computed at the same time 3031 ** as the OP_OpenEphm instruction is coded because not 3032 ** enough information about the compound query is known at that point. 3033 ** The KeyInfo for addrOpenTran[0] and [1] contains collating sequences 3034 ** for the result set. The KeyInfo for addrOpenEphm[2] contains collating 3035 ** sequences for the ORDER BY clause. 3036 */ 3037 struct Select { 3038 u8 op; /* One of: TK_UNION TK_ALL TK_INTERSECT TK_EXCEPT */ 3039 LogEst nSelectRow; /* Estimated number of result rows */ 3040 u32 selFlags; /* Various SF_* values */ 3041 int iLimit, iOffset; /* Memory registers holding LIMIT & OFFSET counters */ 3042 u32 selId; /* Unique identifier number for this SELECT */ 3043 int addrOpenEphm[2]; /* OP_OpenEphem opcodes related to this select */ 3044 ExprList *pEList; /* The fields of the result */ 3045 SrcList *pSrc; /* The FROM clause */ 3046 Expr *pWhere; /* The WHERE clause */ 3047 ExprList *pGroupBy; /* The GROUP BY clause */ 3048 Expr *pHaving; /* The HAVING clause */ 3049 ExprList *pOrderBy; /* The ORDER BY clause */ 3050 Select *pPrior; /* Prior select in a compound select statement */ 3051 Select *pNext; /* Next select to the left in a compound */ 3052 Expr *pLimit; /* LIMIT expression. NULL means not used. */ 3053 With *pWith; /* WITH clause attached to this select. Or NULL. */ 3054 #ifndef SQLITE_OMIT_WINDOWFUNC 3055 Window *pWin; /* List of window functions */ 3056 Window *pWinDefn; /* List of named window definitions */ 3057 #endif 3058 }; 3059 3060 /* 3061 ** Allowed values for Select.selFlags. The "SF" prefix stands for 3062 ** "Select Flag". 3063 ** 3064 ** Value constraints (all checked via assert()) 3065 ** SF_HasAgg == NC_HasAgg 3066 ** SF_MinMaxAgg == NC_MinMaxAgg == SQLITE_FUNC_MINMAX 3067 ** SF_FixedLimit == WHERE_USE_LIMIT 3068 */ 3069 #define SF_Distinct 0x0000001 /* Output should be DISTINCT */ 3070 #define SF_All 0x0000002 /* Includes the ALL keyword */ 3071 #define SF_Resolved 0x0000004 /* Identifiers have been resolved */ 3072 #define SF_Aggregate 0x0000008 /* Contains agg functions or a GROUP BY */ 3073 #define SF_HasAgg 0x0000010 /* Contains aggregate functions */ 3074 #define SF_UsesEphemeral 0x0000020 /* Uses the OpenEphemeral opcode */ 3075 #define SF_Expanded 0x0000040 /* sqlite3SelectExpand() called on this */ 3076 #define SF_HasTypeInfo 0x0000080 /* FROM subqueries have Table metadata */ 3077 #define SF_Compound 0x0000100 /* Part of a compound query */ 3078 #define SF_Values 0x0000200 /* Synthesized from VALUES clause */ 3079 #define SF_MultiValue 0x0000400 /* Single VALUES term with multiple rows */ 3080 #define SF_NestedFrom 0x0000800 /* Part of a parenthesized FROM clause */ 3081 #define SF_MinMaxAgg 0x0001000 /* Aggregate containing min() or max() */ 3082 #define SF_Recursive 0x0002000 /* The recursive part of a recursive CTE */ 3083 #define SF_FixedLimit 0x0004000 /* nSelectRow set by a constant LIMIT */ 3084 #define SF_MaybeConvert 0x0008000 /* Need convertCompoundSelectToSubquery() */ 3085 #define SF_Converted 0x0010000 /* By convertCompoundSelectToSubquery() */ 3086 #define SF_IncludeHidden 0x0020000 /* Include hidden columns in output */ 3087 #define SF_ComplexResult 0x0040000 /* Result contains subquery or function */ 3088 #define SF_WhereBegin 0x0080000 /* Really a WhereBegin() call. Debug Only */ 3089 #define SF_WinRewrite 0x0100000 /* Window function rewrite accomplished */ 3090 #define SF_View 0x0200000 /* SELECT statement is a view */ 3091 3092 /* 3093 ** The results of a SELECT can be distributed in several ways, as defined 3094 ** by one of the following macros. The "SRT" prefix means "SELECT Result 3095 ** Type". 3096 ** 3097 ** SRT_Union Store results as a key in a temporary index 3098 ** identified by pDest->iSDParm. 3099 ** 3100 ** SRT_Except Remove results from the temporary index pDest->iSDParm. 3101 ** 3102 ** SRT_Exists Store a 1 in memory cell pDest->iSDParm if the result 3103 ** set is not empty. 3104 ** 3105 ** SRT_Discard Throw the results away. This is used by SELECT 3106 ** statements within triggers whose only purpose is 3107 ** the side-effects of functions. 3108 ** 3109 ** All of the above are free to ignore their ORDER BY clause. Those that 3110 ** follow must honor the ORDER BY clause. 3111 ** 3112 ** SRT_Output Generate a row of output (using the OP_ResultRow 3113 ** opcode) for each row in the result set. 3114 ** 3115 ** SRT_Mem Only valid if the result is a single column. 3116 ** Store the first column of the first result row 3117 ** in register pDest->iSDParm then abandon the rest 3118 ** of the query. This destination implies "LIMIT 1". 3119 ** 3120 ** SRT_Set The result must be a single column. Store each 3121 ** row of result as the key in table pDest->iSDParm. 3122 ** Apply the affinity pDest->affSdst before storing 3123 ** results. Used to implement "IN (SELECT ...)". 3124 ** 3125 ** SRT_EphemTab Create an temporary table pDest->iSDParm and store 3126 ** the result there. The cursor is left open after 3127 ** returning. This is like SRT_Table except that 3128 ** this destination uses OP_OpenEphemeral to create 3129 ** the table first. 3130 ** 3131 ** SRT_Coroutine Generate a co-routine that returns a new row of 3132 ** results each time it is invoked. The entry point 3133 ** of the co-routine is stored in register pDest->iSDParm 3134 ** and the result row is stored in pDest->nDest registers 3135 ** starting with pDest->iSdst. 3136 ** 3137 ** SRT_Table Store results in temporary table pDest->iSDParm. 3138 ** SRT_Fifo This is like SRT_EphemTab except that the table 3139 ** is assumed to already be open. SRT_Fifo has 3140 ** the additional property of being able to ignore 3141 ** the ORDER BY clause. 3142 ** 3143 ** SRT_DistFifo Store results in a temporary table pDest->iSDParm. 3144 ** But also use temporary table pDest->iSDParm+1 as 3145 ** a record of all prior results and ignore any duplicate 3146 ** rows. Name means: "Distinct Fifo". 3147 ** 3148 ** SRT_Queue Store results in priority queue pDest->iSDParm (really 3149 ** an index). Append a sequence number so that all entries 3150 ** are distinct. 3151 ** 3152 ** SRT_DistQueue Store results in priority queue pDest->iSDParm only if 3153 ** the same record has never been stored before. The 3154 ** index at pDest->iSDParm+1 hold all prior stores. 3155 */ 3156 #define SRT_Union 1 /* Store result as keys in an index */ 3157 #define SRT_Except 2 /* Remove result from a UNION index */ 3158 #define SRT_Exists 3 /* Store 1 if the result is not empty */ 3159 #define SRT_Discard 4 /* Do not save the results anywhere */ 3160 #define SRT_Fifo 5 /* Store result as data with an automatic rowid */ 3161 #define SRT_DistFifo 6 /* Like SRT_Fifo, but unique results only */ 3162 #define SRT_Queue 7 /* Store result in an queue */ 3163 #define SRT_DistQueue 8 /* Like SRT_Queue, but unique results only */ 3164 3165 /* The ORDER BY clause is ignored for all of the above */ 3166 #define IgnorableOrderby(X) ((X->eDest)<=SRT_DistQueue) 3167 3168 #define SRT_Output 9 /* Output each row of result */ 3169 #define SRT_Mem 10 /* Store result in a memory cell */ 3170 #define SRT_Set 11 /* Store results as keys in an index */ 3171 #define SRT_EphemTab 12 /* Create transient tab and store like SRT_Table */ 3172 #define SRT_Coroutine 13 /* Generate a single row of result */ 3173 #define SRT_Table 14 /* Store result as data with an automatic rowid */ 3174 3175 /* 3176 ** An instance of this object describes where to put of the results of 3177 ** a SELECT statement. 3178 */ 3179 struct SelectDest { 3180 u8 eDest; /* How to dispose of the results. On of SRT_* above. */ 3181 int iSDParm; /* A parameter used by the eDest disposal method */ 3182 int iSdst; /* Base register where results are written */ 3183 int nSdst; /* Number of registers allocated */ 3184 char *zAffSdst; /* Affinity used when eDest==SRT_Set */ 3185 ExprList *pOrderBy; /* Key columns for SRT_Queue and SRT_DistQueue */ 3186 }; 3187 3188 /* 3189 ** During code generation of statements that do inserts into AUTOINCREMENT 3190 ** tables, the following information is attached to the Table.u.autoInc.p 3191 ** pointer of each autoincrement table to record some side information that 3192 ** the code generator needs. We have to keep per-table autoincrement 3193 ** information in case inserts are done within triggers. Triggers do not 3194 ** normally coordinate their activities, but we do need to coordinate the 3195 ** loading and saving of autoincrement information. 3196 */ 3197 struct AutoincInfo { 3198 AutoincInfo *pNext; /* Next info block in a list of them all */ 3199 Table *pTab; /* Table this info block refers to */ 3200 int iDb; /* Index in sqlite3.aDb[] of database holding pTab */ 3201 int regCtr; /* Memory register holding the rowid counter */ 3202 }; 3203 3204 /* 3205 ** At least one instance of the following structure is created for each 3206 ** trigger that may be fired while parsing an INSERT, UPDATE or DELETE 3207 ** statement. All such objects are stored in the linked list headed at 3208 ** Parse.pTriggerPrg and deleted once statement compilation has been 3209 ** completed. 3210 ** 3211 ** A Vdbe sub-program that implements the body and WHEN clause of trigger 3212 ** TriggerPrg.pTrigger, assuming a default ON CONFLICT clause of 3213 ** TriggerPrg.orconf, is stored in the TriggerPrg.pProgram variable. 3214 ** The Parse.pTriggerPrg list never contains two entries with the same 3215 ** values for both pTrigger and orconf. 3216 ** 3217 ** The TriggerPrg.aColmask[0] variable is set to a mask of old.* columns 3218 ** accessed (or set to 0 for triggers fired as a result of INSERT 3219 ** statements). Similarly, the TriggerPrg.aColmask[1] variable is set to 3220 ** a mask of new.* columns used by the program. 3221 */ 3222 struct TriggerPrg { 3223 Trigger *pTrigger; /* Trigger this program was coded from */ 3224 TriggerPrg *pNext; /* Next entry in Parse.pTriggerPrg list */ 3225 SubProgram *pProgram; /* Program implementing pTrigger/orconf */ 3226 int orconf; /* Default ON CONFLICT policy */ 3227 u32 aColmask[2]; /* Masks of old.*, new.* columns accessed */ 3228 }; 3229 3230 /* 3231 ** The yDbMask datatype for the bitmask of all attached databases. 3232 */ 3233 #if SQLITE_MAX_ATTACHED>30 3234 typedef unsigned char yDbMask[(SQLITE_MAX_ATTACHED+9)/8]; 3235 # define DbMaskTest(M,I) (((M)[(I)/8]&(1<<((I)&7)))!=0) 3236 # define DbMaskZero(M) memset((M),0,sizeof(M)) 3237 # define DbMaskSet(M,I) (M)[(I)/8]|=(1<<((I)&7)) 3238 # define DbMaskAllZero(M) sqlite3DbMaskAllZero(M) 3239 # define DbMaskNonZero(M) (sqlite3DbMaskAllZero(M)==0) 3240 #else 3241 typedef unsigned int yDbMask; 3242 # define DbMaskTest(M,I) (((M)&(((yDbMask)1)<<(I)))!=0) 3243 # define DbMaskZero(M) (M)=0 3244 # define DbMaskSet(M,I) (M)|=(((yDbMask)1)<<(I)) 3245 # define DbMaskAllZero(M) (M)==0 3246 # define DbMaskNonZero(M) (M)!=0 3247 #endif 3248 3249 /* 3250 ** An SQL parser context. A copy of this structure is passed through 3251 ** the parser and down into all the parser action routine in order to 3252 ** carry around information that is global to the entire parse. 3253 ** 3254 ** The structure is divided into two parts. When the parser and code 3255 ** generate call themselves recursively, the first part of the structure 3256 ** is constant but the second part is reset at the beginning and end of 3257 ** each recursion. 3258 ** 3259 ** The nTableLock and aTableLock variables are only used if the shared-cache 3260 ** feature is enabled (if sqlite3Tsd()->useSharedData is true). They are 3261 ** used to store the set of table-locks required by the statement being 3262 ** compiled. Function sqlite3TableLock() is used to add entries to the 3263 ** list. 3264 */ 3265 struct Parse { 3266 sqlite3 *db; /* The main database structure */ 3267 char *zErrMsg; /* An error message */ 3268 Vdbe *pVdbe; /* An engine for executing database bytecode */ 3269 int rc; /* Return code from execution */ 3270 u8 colNamesSet; /* TRUE after OP_ColumnName has been issued to pVdbe */ 3271 u8 checkSchema; /* Causes schema cookie check after an error */ 3272 u8 nested; /* Number of nested calls to the parser/code generator */ 3273 u8 nTempReg; /* Number of temporary registers in aTempReg[] */ 3274 u8 isMultiWrite; /* True if statement may modify/insert multiple rows */ 3275 u8 mayAbort; /* True if statement may throw an ABORT exception */ 3276 u8 hasCompound; /* Need to invoke convertCompoundSelectToSubquery() */ 3277 u8 okConstFactor; /* OK to factor out constants */ 3278 u8 disableLookaside; /* Number of times lookaside has been disabled */ 3279 u8 disableVtab; /* Disable all virtual tables for this parse */ 3280 int nRangeReg; /* Size of the temporary register block */ 3281 int iRangeReg; /* First register in temporary register block */ 3282 int nErr; /* Number of errors seen */ 3283 int nTab; /* Number of previously allocated VDBE cursors */ 3284 int nMem; /* Number of memory cells used so far */ 3285 int szOpAlloc; /* Bytes of memory space allocated for Vdbe.aOp[] */ 3286 int iSelfTab; /* Table associated with an index on expr, or negative 3287 ** of the base register during check-constraint eval */ 3288 int nLabel; /* The *negative* of the number of labels used */ 3289 int nLabelAlloc; /* Number of slots in aLabel */ 3290 int *aLabel; /* Space to hold the labels */ 3291 ExprList *pConstExpr;/* Constant expressions */ 3292 Token constraintName;/* Name of the constraint currently being parsed */ 3293 yDbMask writeMask; /* Start a write transaction on these databases */ 3294 yDbMask cookieMask; /* Bitmask of schema verified databases */ 3295 int regRowid; /* Register holding rowid of CREATE TABLE entry */ 3296 int regRoot; /* Register holding root page number for new objects */ 3297 int nMaxArg; /* Max args passed to user function by sub-program */ 3298 int nSelect; /* Number of SELECT stmts. Counter for Select.selId */ 3299 #ifndef SQLITE_OMIT_SHARED_CACHE 3300 int nTableLock; /* Number of locks in aTableLock */ 3301 TableLock *aTableLock; /* Required table locks for shared-cache mode */ 3302 #endif 3303 AutoincInfo *pAinc; /* Information about AUTOINCREMENT counters */ 3304 Parse *pToplevel; /* Parse structure for main program (or NULL) */ 3305 Table *pTriggerTab; /* Table triggers are being coded for */ 3306 Parse *pParentParse; /* Parent parser if this parser is nested */ 3307 int addrCrTab; /* Address of OP_CreateBtree opcode on CREATE TABLE */ 3308 u32 nQueryLoop; /* Est number of iterations of a query (10*log2(N)) */ 3309 u32 oldmask; /* Mask of old.* columns referenced */ 3310 u32 newmask; /* Mask of new.* columns referenced */ 3311 u8 eTriggerOp; /* TK_UPDATE, TK_INSERT or TK_DELETE */ 3312 u8 eOrconf; /* Default ON CONFLICT policy for trigger steps */ 3313 u8 disableTriggers; /* True to disable triggers */ 3314 3315 /************************************************************************** 3316 ** Fields above must be initialized to zero. The fields that follow, 3317 ** down to the beginning of the recursive section, do not need to be 3318 ** initialized as they will be set before being used. The boundary is 3319 ** determined by offsetof(Parse,aTempReg). 3320 **************************************************************************/ 3321 3322 int aTempReg[8]; /* Holding area for temporary registers */ 3323 Token sNameToken; /* Token with unqualified schema object name */ 3324 3325 /************************************************************************ 3326 ** Above is constant between recursions. Below is reset before and after 3327 ** each recursion. The boundary between these two regions is determined 3328 ** using offsetof(Parse,sLastToken) so the sLastToken field must be the 3329 ** first field in the recursive region. 3330 ************************************************************************/ 3331 3332 Token sLastToken; /* The last token parsed */ 3333 ynVar nVar; /* Number of '?' variables seen in the SQL so far */ 3334 u8 iPkSortOrder; /* ASC or DESC for INTEGER PRIMARY KEY */ 3335 u8 explain; /* True if the EXPLAIN flag is found on the query */ 3336 #if !(defined(SQLITE_OMIT_VIRTUALTABLE) && defined(SQLITE_OMIT_ALTERTABLE)) 3337 u8 eParseMode; /* PARSE_MODE_XXX constant */ 3338 #endif 3339 #ifndef SQLITE_OMIT_VIRTUALTABLE 3340 int nVtabLock; /* Number of virtual tables to lock */ 3341 #endif 3342 int nHeight; /* Expression tree height of current sub-select */ 3343 #ifndef SQLITE_OMIT_EXPLAIN 3344 int addrExplain; /* Address of current OP_Explain opcode */ 3345 #endif 3346 VList *pVList; /* Mapping between variable names and numbers */ 3347 Vdbe *pReprepare; /* VM being reprepared (sqlite3Reprepare()) */ 3348 const char *zTail; /* All SQL text past the last semicolon parsed */ 3349 Table *pNewTable; /* A table being constructed by CREATE TABLE */ 3350 Index *pNewIndex; /* An index being constructed by CREATE INDEX. 3351 ** Also used to hold redundant UNIQUE constraints 3352 ** during a RENAME COLUMN */ 3353 Trigger *pNewTrigger; /* Trigger under construct by a CREATE TRIGGER */ 3354 const char *zAuthContext; /* The 6th parameter to db->xAuth callbacks */ 3355 #ifndef SQLITE_OMIT_VIRTUALTABLE 3356 Token sArg; /* Complete text of a module argument */ 3357 Table **apVtabLock; /* Pointer to virtual tables needing locking */ 3358 #endif 3359 Table *pZombieTab; /* List of Table objects to delete after code gen */ 3360 TriggerPrg *pTriggerPrg; /* Linked list of coded triggers */ 3361 With *pWith; /* Current WITH clause, or NULL */ 3362 With *pWithToFree; /* Free this WITH object at the end of the parse */ 3363 #ifndef SQLITE_OMIT_ALTERTABLE 3364 RenameToken *pRename; /* Tokens subject to renaming by ALTER TABLE */ 3365 #endif 3366 }; 3367 3368 #define PARSE_MODE_NORMAL 0 3369 #define PARSE_MODE_DECLARE_VTAB 1 3370 #define PARSE_MODE_RENAME 2 3371 #define PARSE_MODE_UNMAP 3 3372 3373 /* 3374 ** Sizes and pointers of various parts of the Parse object. 3375 */ 3376 #define PARSE_HDR_SZ offsetof(Parse,aTempReg) /* Recursive part w/o aColCache*/ 3377 #define PARSE_RECURSE_SZ offsetof(Parse,sLastToken) /* Recursive part */ 3378 #define PARSE_TAIL_SZ (sizeof(Parse)-PARSE_RECURSE_SZ) /* Non-recursive part */ 3379 #define PARSE_TAIL(X) (((char*)(X))+PARSE_RECURSE_SZ) /* Pointer to tail */ 3380 3381 /* 3382 ** Return true if currently inside an sqlite3_declare_vtab() call. 3383 */ 3384 #ifdef SQLITE_OMIT_VIRTUALTABLE 3385 #define IN_DECLARE_VTAB 0 3386 #else 3387 #define IN_DECLARE_VTAB (pParse->eParseMode==PARSE_MODE_DECLARE_VTAB) 3388 #endif 3389 3390 #if defined(SQLITE_OMIT_ALTERTABLE) 3391 #define IN_RENAME_OBJECT 0 3392 #else 3393 #define IN_RENAME_OBJECT (pParse->eParseMode>=PARSE_MODE_RENAME) 3394 #endif 3395 3396 #if defined(SQLITE_OMIT_VIRTUALTABLE) && defined(SQLITE_OMIT_ALTERTABLE) 3397 #define IN_SPECIAL_PARSE 0 3398 #else 3399 #define IN_SPECIAL_PARSE (pParse->eParseMode!=PARSE_MODE_NORMAL) 3400 #endif 3401 3402 /* 3403 ** An instance of the following structure can be declared on a stack and used 3404 ** to save the Parse.zAuthContext value so that it can be restored later. 3405 */ 3406 struct AuthContext { 3407 const char *zAuthContext; /* Put saved Parse.zAuthContext here */ 3408 Parse *pParse; /* The Parse structure */ 3409 }; 3410 3411 /* 3412 ** Bitfield flags for P5 value in various opcodes. 3413 ** 3414 ** Value constraints (enforced via assert()): 3415 ** OPFLAG_LENGTHARG == SQLITE_FUNC_LENGTH 3416 ** OPFLAG_TYPEOFARG == SQLITE_FUNC_TYPEOF 3417 ** OPFLAG_BULKCSR == BTREE_BULKLOAD 3418 ** OPFLAG_SEEKEQ == BTREE_SEEK_EQ 3419 ** OPFLAG_FORDELETE == BTREE_FORDELETE 3420 ** OPFLAG_SAVEPOSITION == BTREE_SAVEPOSITION 3421 ** OPFLAG_AUXDELETE == BTREE_AUXDELETE 3422 */ 3423 #define OPFLAG_NCHANGE 0x01 /* OP_Insert: Set to update db->nChange */ 3424 /* Also used in P2 (not P5) of OP_Delete */ 3425 #define OPFLAG_NOCHNG 0x01 /* OP_VColumn nochange for UPDATE */ 3426 #define OPFLAG_EPHEM 0x01 /* OP_Column: Ephemeral output is ok */ 3427 #define OPFLAG_LASTROWID 0x20 /* Set to update db->lastRowid */ 3428 #define OPFLAG_ISUPDATE 0x04 /* This OP_Insert is an sql UPDATE */ 3429 #define OPFLAG_APPEND 0x08 /* This is likely to be an append */ 3430 #define OPFLAG_USESEEKRESULT 0x10 /* Try to avoid a seek in BtreeInsert() */ 3431 #define OPFLAG_ISNOOP 0x40 /* OP_Delete does pre-update-hook only */ 3432 #define OPFLAG_LENGTHARG 0x40 /* OP_Column only used for length() */ 3433 #define OPFLAG_TYPEOFARG 0x80 /* OP_Column only used for typeof() */ 3434 #define OPFLAG_BULKCSR 0x01 /* OP_Open** used to open bulk cursor */ 3435 #define OPFLAG_SEEKEQ 0x02 /* OP_Open** cursor uses EQ seek only */ 3436 #define OPFLAG_FORDELETE 0x08 /* OP_Open should use BTREE_FORDELETE */ 3437 #define OPFLAG_P2ISREG 0x10 /* P2 to OP_Open** is a register number */ 3438 #define OPFLAG_PERMUTE 0x01 /* OP_Compare: use the permutation */ 3439 #define OPFLAG_SAVEPOSITION 0x02 /* OP_Delete/Insert: save cursor pos */ 3440 #define OPFLAG_AUXDELETE 0x04 /* OP_Delete: index in a DELETE op */ 3441 #define OPFLAG_NOCHNG_MAGIC 0x6d /* OP_MakeRecord: serialtype 10 is ok */ 3442 3443 /* 3444 * Each trigger present in the database schema is stored as an instance of 3445 * struct Trigger. 3446 * 3447 * Pointers to instances of struct Trigger are stored in two ways. 3448 * 1. In the "trigHash" hash table (part of the sqlite3* that represents the 3449 * database). This allows Trigger structures to be retrieved by name. 3450 * 2. All triggers associated with a single table form a linked list, using the 3451 * pNext member of struct Trigger. A pointer to the first element of the 3452 * linked list is stored as the "pTrigger" member of the associated 3453 * struct Table. 3454 * 3455 * The "step_list" member points to the first element of a linked list 3456 * containing the SQL statements specified as the trigger program. 3457 */ 3458 struct Trigger { 3459 char *zName; /* The name of the trigger */ 3460 char *table; /* The table or view to which the trigger applies */ 3461 u8 op; /* One of TK_DELETE, TK_UPDATE, TK_INSERT */ 3462 u8 tr_tm; /* One of TRIGGER_BEFORE, TRIGGER_AFTER */ 3463 Expr *pWhen; /* The WHEN clause of the expression (may be NULL) */ 3464 IdList *pColumns; /* If this is an UPDATE OF <column-list> trigger, 3465 the <column-list> is stored here */ 3466 Schema *pSchema; /* Schema containing the trigger */ 3467 Schema *pTabSchema; /* Schema containing the table */ 3468 TriggerStep *step_list; /* Link list of trigger program steps */ 3469 Trigger *pNext; /* Next trigger associated with the table */ 3470 }; 3471 3472 /* 3473 ** A trigger is either a BEFORE or an AFTER trigger. The following constants 3474 ** determine which. 3475 ** 3476 ** If there are multiple triggers, you might of some BEFORE and some AFTER. 3477 ** In that cases, the constants below can be ORed together. 3478 */ 3479 #define TRIGGER_BEFORE 1 3480 #define TRIGGER_AFTER 2 3481 3482 /* 3483 * An instance of struct TriggerStep is used to store a single SQL statement 3484 * that is a part of a trigger-program. 3485 * 3486 * Instances of struct TriggerStep are stored in a singly linked list (linked 3487 * using the "pNext" member) referenced by the "step_list" member of the 3488 * associated struct Trigger instance. The first element of the linked list is 3489 * the first step of the trigger-program. 3490 * 3491 * The "op" member indicates whether this is a "DELETE", "INSERT", "UPDATE" or 3492 * "SELECT" statement. The meanings of the other members is determined by the 3493 * value of "op" as follows: 3494 * 3495 * (op == TK_INSERT) 3496 * orconf -> stores the ON CONFLICT algorithm 3497 * pSelect -> If this is an INSERT INTO ... SELECT ... statement, then 3498 * this stores a pointer to the SELECT statement. Otherwise NULL. 3499 * zTarget -> Dequoted name of the table to insert into. 3500 * pExprList -> If this is an INSERT INTO ... VALUES ... statement, then 3501 * this stores values to be inserted. Otherwise NULL. 3502 * pIdList -> If this is an INSERT INTO ... (<column-names>) VALUES ... 3503 * statement, then this stores the column-names to be 3504 * inserted into. 3505 * 3506 * (op == TK_DELETE) 3507 * zTarget -> Dequoted name of the table to delete from. 3508 * pWhere -> The WHERE clause of the DELETE statement if one is specified. 3509 * Otherwise NULL. 3510 * 3511 * (op == TK_UPDATE) 3512 * zTarget -> Dequoted name of the table to update. 3513 * pWhere -> The WHERE clause of the UPDATE statement if one is specified. 3514 * Otherwise NULL. 3515 * pExprList -> A list of the columns to update and the expressions to update 3516 * them to. See sqlite3Update() documentation of "pChanges" 3517 * argument. 3518 * 3519 */ 3520 struct TriggerStep { 3521 u8 op; /* One of TK_DELETE, TK_UPDATE, TK_INSERT, TK_SELECT */ 3522 u8 orconf; /* OE_Rollback etc. */ 3523 Trigger *pTrig; /* The trigger that this step is a part of */ 3524 Select *pSelect; /* SELECT statement or RHS of INSERT INTO SELECT ... */ 3525 char *zTarget; /* Target table for DELETE, UPDATE, INSERT */ 3526 Expr *pWhere; /* The WHERE clause for DELETE or UPDATE steps */ 3527 ExprList *pExprList; /* SET clause for UPDATE */ 3528 IdList *pIdList; /* Column names for INSERT */ 3529 Upsert *pUpsert; /* Upsert clauses on an INSERT */ 3530 char *zSpan; /* Original SQL text of this command */ 3531 TriggerStep *pNext; /* Next in the link-list */ 3532 TriggerStep *pLast; /* Last element in link-list. Valid for 1st elem only */ 3533 }; 3534 3535 /* 3536 ** The following structure contains information used by the sqliteFix... 3537 ** routines as they walk the parse tree to make database references 3538 ** explicit. 3539 */ 3540 typedef struct DbFixer DbFixer; 3541 struct DbFixer { 3542 Parse *pParse; /* The parsing context. Error messages written here */ 3543 Schema *pSchema; /* Fix items to this schema */ 3544 u8 bTemp; /* True for TEMP schema entries */ 3545 const char *zDb; /* Make sure all objects are contained in this database */ 3546 const char *zType; /* Type of the container - used for error messages */ 3547 const Token *pName; /* Name of the container - used for error messages */ 3548 }; 3549 3550 /* 3551 ** An objected used to accumulate the text of a string where we 3552 ** do not necessarily know how big the string will be in the end. 3553 */ 3554 struct sqlite3_str { 3555 sqlite3 *db; /* Optional database for lookaside. Can be NULL */ 3556 char *zText; /* The string collected so far */ 3557 u32 nAlloc; /* Amount of space allocated in zText */ 3558 u32 mxAlloc; /* Maximum allowed allocation. 0 for no malloc usage */ 3559 u32 nChar; /* Length of the string so far */ 3560 u8 accError; /* SQLITE_NOMEM or SQLITE_TOOBIG */ 3561 u8 printfFlags; /* SQLITE_PRINTF flags below */ 3562 }; 3563 #define SQLITE_PRINTF_INTERNAL 0x01 /* Internal-use-only converters allowed */ 3564 #define SQLITE_PRINTF_SQLFUNC 0x02 /* SQL function arguments to VXPrintf */ 3565 #define SQLITE_PRINTF_MALLOCED 0x04 /* True if xText is allocated space */ 3566 3567 #define isMalloced(X) (((X)->printfFlags & SQLITE_PRINTF_MALLOCED)!=0) 3568 3569 3570 /* 3571 ** A pointer to this structure is used to communicate information 3572 ** from sqlite3Init and OP_ParseSchema into the sqlite3InitCallback. 3573 */ 3574 typedef struct { 3575 sqlite3 *db; /* The database being initialized */ 3576 char **pzErrMsg; /* Error message stored here */ 3577 int iDb; /* 0 for main database. 1 for TEMP, 2.. for ATTACHed */ 3578 int rc; /* Result code stored here */ 3579 u32 mInitFlags; /* Flags controlling error messages */ 3580 u32 nInitRow; /* Number of rows processed */ 3581 } InitData; 3582 3583 /* 3584 ** Allowed values for mInitFlags 3585 */ 3586 #define INITFLAG_AlterTable 0x0001 /* This is a reparse after ALTER TABLE */ 3587 3588 /* 3589 ** Structure containing global configuration data for the SQLite library. 3590 ** 3591 ** This structure also contains some state information. 3592 */ 3593 struct Sqlite3Config { 3594 int bMemstat; /* True to enable memory status */ 3595 u8 bCoreMutex; /* True to enable core mutexing */ 3596 u8 bFullMutex; /* True to enable full mutexing */ 3597 u8 bOpenUri; /* True to interpret filenames as URIs */ 3598 u8 bUseCis; /* Use covering indices for full-scans */ 3599 u8 bSmallMalloc; /* Avoid large memory allocations if true */ 3600 u8 bExtraSchemaChecks; /* Verify type,name,tbl_name in schema */ 3601 int mxStrlen; /* Maximum string length */ 3602 int neverCorrupt; /* Database is always well-formed */ 3603 int szLookaside; /* Default lookaside buffer size */ 3604 int nLookaside; /* Default lookaside buffer count */ 3605 int nStmtSpill; /* Stmt-journal spill-to-disk threshold */ 3606 sqlite3_mem_methods m; /* Low-level memory allocation interface */ 3607 sqlite3_mutex_methods mutex; /* Low-level mutex interface */ 3608 sqlite3_pcache_methods2 pcache2; /* Low-level page-cache interface */ 3609 void *pHeap; /* Heap storage space */ 3610 int nHeap; /* Size of pHeap[] */ 3611 int mnReq, mxReq; /* Min and max heap requests sizes */ 3612 sqlite3_int64 szMmap; /* mmap() space per open file */ 3613 sqlite3_int64 mxMmap; /* Maximum value for szMmap */ 3614 void *pPage; /* Page cache memory */ 3615 int szPage; /* Size of each page in pPage[] */ 3616 int nPage; /* Number of pages in pPage[] */ 3617 int mxParserStack; /* maximum depth of the parser stack */ 3618 int sharedCacheEnabled; /* true if shared-cache mode enabled */ 3619 u32 szPma; /* Maximum Sorter PMA size */ 3620 /* The above might be initialized to non-zero. The following need to always 3621 ** initially be zero, however. */ 3622 int isInit; /* True after initialization has finished */ 3623 int inProgress; /* True while initialization in progress */ 3624 int isMutexInit; /* True after mutexes are initialized */ 3625 int isMallocInit; /* True after malloc is initialized */ 3626 int isPCacheInit; /* True after malloc is initialized */ 3627 int nRefInitMutex; /* Number of users of pInitMutex */ 3628 sqlite3_mutex *pInitMutex; /* Mutex used by sqlite3_initialize() */ 3629 void (*xLog)(void*,int,const char*); /* Function for logging */ 3630 void *pLogArg; /* First argument to xLog() */ 3631 #ifdef SQLITE_ENABLE_SQLLOG 3632 void(*xSqllog)(void*,sqlite3*,const char*, int); 3633 void *pSqllogArg; 3634 #endif 3635 #ifdef SQLITE_VDBE_COVERAGE 3636 /* The following callback (if not NULL) is invoked on every VDBE branch 3637 ** operation. Set the callback using SQLITE_TESTCTRL_VDBE_COVERAGE. 3638 */ 3639 void (*xVdbeBranch)(void*,unsigned iSrcLine,u8 eThis,u8 eMx); /* Callback */ 3640 void *pVdbeBranchArg; /* 1st argument */ 3641 #endif 3642 #ifdef SQLITE_ENABLE_DESERIALIZE 3643 sqlite3_int64 mxMemdbSize; /* Default max memdb size */ 3644 #endif 3645 #ifndef SQLITE_UNTESTABLE 3646 int (*xTestCallback)(int); /* Invoked by sqlite3FaultSim() */ 3647 #endif 3648 int bLocaltimeFault; /* True to fail localtime() calls */ 3649 int iOnceResetThreshold; /* When to reset OP_Once counters */ 3650 u32 szSorterRef; /* Min size in bytes to use sorter-refs */ 3651 unsigned int iPrngSeed; /* Alternative fixed seed for the PRNG */ 3652 }; 3653 3654 /* 3655 ** This macro is used inside of assert() statements to indicate that 3656 ** the assert is only valid on a well-formed database. Instead of: 3657 ** 3658 ** assert( X ); 3659 ** 3660 ** One writes: 3661 ** 3662 ** assert( X || CORRUPT_DB ); 3663 ** 3664 ** CORRUPT_DB is true during normal operation. CORRUPT_DB does not indicate 3665 ** that the database is definitely corrupt, only that it might be corrupt. 3666 ** For most test cases, CORRUPT_DB is set to false using a special 3667 ** sqlite3_test_control(). This enables assert() statements to prove 3668 ** things that are always true for well-formed databases. 3669 */ 3670 #define CORRUPT_DB (sqlite3Config.neverCorrupt==0) 3671 3672 /* 3673 ** Context pointer passed down through the tree-walk. 3674 */ 3675 struct Walker { 3676 Parse *pParse; /* Parser context. */ 3677 int (*xExprCallback)(Walker*, Expr*); /* Callback for expressions */ 3678 int (*xSelectCallback)(Walker*,Select*); /* Callback for SELECTs */ 3679 void (*xSelectCallback2)(Walker*,Select*);/* Second callback for SELECTs */ 3680 int walkerDepth; /* Number of subqueries */ 3681 u16 eCode; /* A small processing code */ 3682 union { /* Extra data for callback */ 3683 NameContext *pNC; /* Naming context */ 3684 int n; /* A counter */ 3685 int iCur; /* A cursor number */ 3686 SrcList *pSrcList; /* FROM clause */ 3687 struct SrcCount *pSrcCount; /* Counting column references */ 3688 struct CCurHint *pCCurHint; /* Used by codeCursorHint() */ 3689 int *aiCol; /* array of column indexes */ 3690 struct IdxCover *pIdxCover; /* Check for index coverage */ 3691 struct IdxExprTrans *pIdxTrans; /* Convert idxed expr to column */ 3692 ExprList *pGroupBy; /* GROUP BY clause */ 3693 Select *pSelect; /* HAVING to WHERE clause ctx */ 3694 struct WindowRewrite *pRewrite; /* Window rewrite context */ 3695 struct WhereConst *pConst; /* WHERE clause constants */ 3696 struct RenameCtx *pRename; /* RENAME COLUMN context */ 3697 struct Table *pTab; /* Table of generated column */ 3698 } u; 3699 }; 3700 3701 /* Forward declarations */ 3702 int sqlite3WalkExpr(Walker*, Expr*); 3703 int sqlite3WalkExprList(Walker*, ExprList*); 3704 int sqlite3WalkSelect(Walker*, Select*); 3705 int sqlite3WalkSelectExpr(Walker*, Select*); 3706 int sqlite3WalkSelectFrom(Walker*, Select*); 3707 int sqlite3ExprWalkNoop(Walker*, Expr*); 3708 int sqlite3SelectWalkNoop(Walker*, Select*); 3709 int sqlite3SelectWalkFail(Walker*, Select*); 3710 #ifdef SQLITE_DEBUG 3711 void sqlite3SelectWalkAssert2(Walker*, Select*); 3712 #endif 3713 3714 /* 3715 ** Return code from the parse-tree walking primitives and their 3716 ** callbacks. 3717 */ 3718 #define WRC_Continue 0 /* Continue down into children */ 3719 #define WRC_Prune 1 /* Omit children but continue walking siblings */ 3720 #define WRC_Abort 2 /* Abandon the tree walk */ 3721 3722 /* 3723 ** An instance of this structure represents a set of one or more CTEs 3724 ** (common table expressions) created by a single WITH clause. 3725 */ 3726 struct With { 3727 int nCte; /* Number of CTEs in the WITH clause */ 3728 With *pOuter; /* Containing WITH clause, or NULL */ 3729 struct Cte { /* For each CTE in the WITH clause.... */ 3730 char *zName; /* Name of this CTE */ 3731 ExprList *pCols; /* List of explicit column names, or NULL */ 3732 Select *pSelect; /* The definition of this CTE */ 3733 const char *zCteErr; /* Error message for circular references */ 3734 } a[1]; 3735 }; 3736 3737 #ifdef SQLITE_DEBUG 3738 /* 3739 ** An instance of the TreeView object is used for printing the content of 3740 ** data structures on sqlite3DebugPrintf() using a tree-like view. 3741 */ 3742 struct TreeView { 3743 int iLevel; /* Which level of the tree we are on */ 3744 u8 bLine[100]; /* Draw vertical in column i if bLine[i] is true */ 3745 }; 3746 #endif /* SQLITE_DEBUG */ 3747 3748 /* 3749 ** This object is used in various ways, most (but not all) related to window 3750 ** functions. 3751 ** 3752 ** (1) A single instance of this structure is attached to the 3753 ** the Expr.y.pWin field for each window function in an expression tree. 3754 ** This object holds the information contained in the OVER clause, 3755 ** plus additional fields used during code generation. 3756 ** 3757 ** (2) All window functions in a single SELECT form a linked-list 3758 ** attached to Select.pWin. The Window.pFunc and Window.pExpr 3759 ** fields point back to the expression that is the window function. 3760 ** 3761 ** (3) The terms of the WINDOW clause of a SELECT are instances of this 3762 ** object on a linked list attached to Select.pWinDefn. 3763 ** 3764 ** (4) For an aggregate function with a FILTER clause, an instance 3765 ** of this object is stored in Expr.y.pWin with eFrmType set to 3766 ** TK_FILTER. In this case the only field used is Window.pFilter. 3767 ** 3768 ** The uses (1) and (2) are really the same Window object that just happens 3769 ** to be accessible in two different ways. Use case (3) are separate objects. 3770 */ 3771 struct Window { 3772 char *zName; /* Name of window (may be NULL) */ 3773 char *zBase; /* Name of base window for chaining (may be NULL) */ 3774 ExprList *pPartition; /* PARTITION BY clause */ 3775 ExprList *pOrderBy; /* ORDER BY clause */ 3776 u8 eFrmType; /* TK_RANGE, TK_GROUPS, TK_ROWS, or 0 */ 3777 u8 eStart; /* UNBOUNDED, CURRENT, PRECEDING or FOLLOWING */ 3778 u8 eEnd; /* UNBOUNDED, CURRENT, PRECEDING or FOLLOWING */ 3779 u8 bImplicitFrame; /* True if frame was implicitly specified */ 3780 u8 eExclude; /* TK_NO, TK_CURRENT, TK_TIES, TK_GROUP, or 0 */ 3781 Expr *pStart; /* Expression for "<expr> PRECEDING" */ 3782 Expr *pEnd; /* Expression for "<expr> FOLLOWING" */ 3783 Window **ppThis; /* Pointer to this object in Select.pWin list */ 3784 Window *pNextWin; /* Next window function belonging to this SELECT */ 3785 Expr *pFilter; /* The FILTER expression */ 3786 FuncDef *pFunc; /* The function */ 3787 int iEphCsr; /* Partition buffer or Peer buffer */ 3788 int regAccum; /* Accumulator */ 3789 int regResult; /* Interim result */ 3790 int csrApp; /* Function cursor (used by min/max) */ 3791 int regApp; /* Function register (also used by min/max) */ 3792 int regPart; /* Array of registers for PARTITION BY values */ 3793 Expr *pOwner; /* Expression object this window is attached to */ 3794 int nBufferCol; /* Number of columns in buffer table */ 3795 int iArgCol; /* Offset of first argument for this function */ 3796 int regOne; /* Register containing constant value 1 */ 3797 int regStartRowid; 3798 int regEndRowid; 3799 u8 bExprArgs; /* Defer evaluation of window function arguments 3800 ** due to the SQLITE_SUBTYPE flag */ 3801 }; 3802 3803 #ifndef SQLITE_OMIT_WINDOWFUNC 3804 void sqlite3WindowDelete(sqlite3*, Window*); 3805 void sqlite3WindowUnlinkFromSelect(Window*); 3806 void sqlite3WindowListDelete(sqlite3 *db, Window *p); 3807 Window *sqlite3WindowAlloc(Parse*, int, int, Expr*, int , Expr*, u8); 3808 void sqlite3WindowAttach(Parse*, Expr*, Window*); 3809 void sqlite3WindowLink(Select *pSel, Window *pWin); 3810 int sqlite3WindowCompare(Parse*, Window*, Window*, int); 3811 void sqlite3WindowCodeInit(Parse*, Select*); 3812 void sqlite3WindowCodeStep(Parse*, Select*, WhereInfo*, int, int); 3813 int sqlite3WindowRewrite(Parse*, Select*); 3814 int sqlite3ExpandSubquery(Parse*, struct SrcList_item*); 3815 void sqlite3WindowUpdate(Parse*, Window*, Window*, FuncDef*); 3816 Window *sqlite3WindowDup(sqlite3 *db, Expr *pOwner, Window *p); 3817 Window *sqlite3WindowListDup(sqlite3 *db, Window *p); 3818 void sqlite3WindowFunctions(void); 3819 void sqlite3WindowChain(Parse*, Window*, Window*); 3820 Window *sqlite3WindowAssemble(Parse*, Window*, ExprList*, ExprList*, Token*); 3821 #else 3822 # define sqlite3WindowDelete(a,b) 3823 # define sqlite3WindowFunctions() 3824 # define sqlite3WindowAttach(a,b,c) 3825 #endif 3826 3827 /* 3828 ** Assuming zIn points to the first byte of a UTF-8 character, 3829 ** advance zIn to point to the first byte of the next UTF-8 character. 3830 */ 3831 #define SQLITE_SKIP_UTF8(zIn) { \ 3832 if( (*(zIn++))>=0xc0 ){ \ 3833 while( (*zIn & 0xc0)==0x80 ){ zIn++; } \ 3834 } \ 3835 } 3836 3837 /* 3838 ** The SQLITE_*_BKPT macros are substitutes for the error codes with 3839 ** the same name but without the _BKPT suffix. These macros invoke 3840 ** routines that report the line-number on which the error originated 3841 ** using sqlite3_log(). The routines also provide a convenient place 3842 ** to set a debugger breakpoint. 3843 */ 3844 int sqlite3ReportError(int iErr, int lineno, const char *zType); 3845 int sqlite3CorruptError(int); 3846 int sqlite3MisuseError(int); 3847 int sqlite3CantopenError(int); 3848 #define SQLITE_CORRUPT_BKPT sqlite3CorruptError(__LINE__) 3849 #define SQLITE_MISUSE_BKPT sqlite3MisuseError(__LINE__) 3850 #define SQLITE_CANTOPEN_BKPT sqlite3CantopenError(__LINE__) 3851 #ifdef SQLITE_DEBUG 3852 int sqlite3NomemError(int); 3853 int sqlite3IoerrnomemError(int); 3854 # define SQLITE_NOMEM_BKPT sqlite3NomemError(__LINE__) 3855 # define SQLITE_IOERR_NOMEM_BKPT sqlite3IoerrnomemError(__LINE__) 3856 #else 3857 # define SQLITE_NOMEM_BKPT SQLITE_NOMEM 3858 # define SQLITE_IOERR_NOMEM_BKPT SQLITE_IOERR_NOMEM 3859 #endif 3860 #if defined(SQLITE_DEBUG) || defined(SQLITE_ENABLE_CORRUPT_PGNO) 3861 int sqlite3CorruptPgnoError(int,Pgno); 3862 # define SQLITE_CORRUPT_PGNO(P) sqlite3CorruptPgnoError(__LINE__,(P)) 3863 #else 3864 # define SQLITE_CORRUPT_PGNO(P) sqlite3CorruptError(__LINE__) 3865 #endif 3866 3867 /* 3868 ** FTS3 and FTS4 both require virtual table support 3869 */ 3870 #if defined(SQLITE_OMIT_VIRTUALTABLE) 3871 # undef SQLITE_ENABLE_FTS3 3872 # undef SQLITE_ENABLE_FTS4 3873 #endif 3874 3875 /* 3876 ** FTS4 is really an extension for FTS3. It is enabled using the 3877 ** SQLITE_ENABLE_FTS3 macro. But to avoid confusion we also call 3878 ** the SQLITE_ENABLE_FTS4 macro to serve as an alias for SQLITE_ENABLE_FTS3. 3879 */ 3880 #if defined(SQLITE_ENABLE_FTS4) && !defined(SQLITE_ENABLE_FTS3) 3881 # define SQLITE_ENABLE_FTS3 1 3882 #endif 3883 3884 /* 3885 ** The ctype.h header is needed for non-ASCII systems. It is also 3886 ** needed by FTS3 when FTS3 is included in the amalgamation. 3887 */ 3888 #if !defined(SQLITE_ASCII) || \ 3889 (defined(SQLITE_ENABLE_FTS3) && defined(SQLITE_AMALGAMATION)) 3890 # include <ctype.h> 3891 #endif 3892 3893 /* 3894 ** The following macros mimic the standard library functions toupper(), 3895 ** isspace(), isalnum(), isdigit() and isxdigit(), respectively. The 3896 ** sqlite versions only work for ASCII characters, regardless of locale. 3897 */ 3898 #ifdef SQLITE_ASCII 3899 # define sqlite3Toupper(x) ((x)&~(sqlite3CtypeMap[(unsigned char)(x)]&0x20)) 3900 # define sqlite3Isspace(x) (sqlite3CtypeMap[(unsigned char)(x)]&0x01) 3901 # define sqlite3Isalnum(x) (sqlite3CtypeMap[(unsigned char)(x)]&0x06) 3902 # define sqlite3Isalpha(x) (sqlite3CtypeMap[(unsigned char)(x)]&0x02) 3903 # define sqlite3Isdigit(x) (sqlite3CtypeMap[(unsigned char)(x)]&0x04) 3904 # define sqlite3Isxdigit(x) (sqlite3CtypeMap[(unsigned char)(x)]&0x08) 3905 # define sqlite3Tolower(x) (sqlite3UpperToLower[(unsigned char)(x)]) 3906 # define sqlite3Isquote(x) (sqlite3CtypeMap[(unsigned char)(x)]&0x80) 3907 #else 3908 # define sqlite3Toupper(x) toupper((unsigned char)(x)) 3909 # define sqlite3Isspace(x) isspace((unsigned char)(x)) 3910 # define sqlite3Isalnum(x) isalnum((unsigned char)(x)) 3911 # define sqlite3Isalpha(x) isalpha((unsigned char)(x)) 3912 # define sqlite3Isdigit(x) isdigit((unsigned char)(x)) 3913 # define sqlite3Isxdigit(x) isxdigit((unsigned char)(x)) 3914 # define sqlite3Tolower(x) tolower((unsigned char)(x)) 3915 # define sqlite3Isquote(x) ((x)=='"'||(x)=='\''||(x)=='['||(x)=='`') 3916 #endif 3917 int sqlite3IsIdChar(u8); 3918 3919 /* 3920 ** Internal function prototypes 3921 */ 3922 int sqlite3StrICmp(const char*,const char*); 3923 int sqlite3Strlen30(const char*); 3924 #define sqlite3Strlen30NN(C) (strlen(C)&0x3fffffff) 3925 char *sqlite3ColumnType(Column*,char*); 3926 #define sqlite3StrNICmp sqlite3_strnicmp 3927 3928 int sqlite3MallocInit(void); 3929 void sqlite3MallocEnd(void); 3930 void *sqlite3Malloc(u64); 3931 void *sqlite3MallocZero(u64); 3932 void *sqlite3DbMallocZero(sqlite3*, u64); 3933 void *sqlite3DbMallocRaw(sqlite3*, u64); 3934 void *sqlite3DbMallocRawNN(sqlite3*, u64); 3935 char *sqlite3DbStrDup(sqlite3*,const char*); 3936 char *sqlite3DbStrNDup(sqlite3*,const char*, u64); 3937 char *sqlite3DbSpanDup(sqlite3*,const char*,const char*); 3938 void *sqlite3Realloc(void*, u64); 3939 void *sqlite3DbReallocOrFree(sqlite3 *, void *, u64); 3940 void *sqlite3DbRealloc(sqlite3 *, void *, u64); 3941 void sqlite3DbFree(sqlite3*, void*); 3942 void sqlite3DbFreeNN(sqlite3*, void*); 3943 int sqlite3MallocSize(void*); 3944 int sqlite3DbMallocSize(sqlite3*, void*); 3945 void *sqlite3PageMalloc(int); 3946 void sqlite3PageFree(void*); 3947 void sqlite3MemSetDefault(void); 3948 #ifndef SQLITE_UNTESTABLE 3949 void sqlite3BenignMallocHooks(void (*)(void), void (*)(void)); 3950 #endif 3951 int sqlite3HeapNearlyFull(void); 3952 3953 /* 3954 ** On systems with ample stack space and that support alloca(), make 3955 ** use of alloca() to obtain space for large automatic objects. By default, 3956 ** obtain space from malloc(). 3957 ** 3958 ** The alloca() routine never returns NULL. This will cause code paths 3959 ** that deal with sqlite3StackAlloc() failures to be unreachable. 3960 */ 3961 #ifdef SQLITE_USE_ALLOCA 3962 # define sqlite3StackAllocRaw(D,N) alloca(N) 3963 # define sqlite3StackAllocZero(D,N) memset(alloca(N), 0, N) 3964 # define sqlite3StackFree(D,P) 3965 #else 3966 # define sqlite3StackAllocRaw(D,N) sqlite3DbMallocRaw(D,N) 3967 # define sqlite3StackAllocZero(D,N) sqlite3DbMallocZero(D,N) 3968 # define sqlite3StackFree(D,P) sqlite3DbFree(D,P) 3969 #endif 3970 3971 /* Do not allow both MEMSYS5 and MEMSYS3 to be defined together. If they 3972 ** are, disable MEMSYS3 3973 */ 3974 #ifdef SQLITE_ENABLE_MEMSYS5 3975 const sqlite3_mem_methods *sqlite3MemGetMemsys5(void); 3976 #undef SQLITE_ENABLE_MEMSYS3 3977 #endif 3978 #ifdef SQLITE_ENABLE_MEMSYS3 3979 const sqlite3_mem_methods *sqlite3MemGetMemsys3(void); 3980 #endif 3981 3982 3983 #ifndef SQLITE_MUTEX_OMIT 3984 sqlite3_mutex_methods const *sqlite3DefaultMutex(void); 3985 sqlite3_mutex_methods const *sqlite3NoopMutex(void); 3986 sqlite3_mutex *sqlite3MutexAlloc(int); 3987 int sqlite3MutexInit(void); 3988 int sqlite3MutexEnd(void); 3989 #endif 3990 #if !defined(SQLITE_MUTEX_OMIT) && !defined(SQLITE_MUTEX_NOOP) 3991 void sqlite3MemoryBarrier(void); 3992 #else 3993 # define sqlite3MemoryBarrier() 3994 #endif 3995 3996 sqlite3_int64 sqlite3StatusValue(int); 3997 void sqlite3StatusUp(int, int); 3998 void sqlite3StatusDown(int, int); 3999 void sqlite3StatusHighwater(int, int); 4000 int sqlite3LookasideUsed(sqlite3*,int*); 4001 4002 /* Access to mutexes used by sqlite3_status() */ 4003 sqlite3_mutex *sqlite3Pcache1Mutex(void); 4004 sqlite3_mutex *sqlite3MallocMutex(void); 4005 4006 #if defined(SQLITE_ENABLE_MULTITHREADED_CHECKS) && !defined(SQLITE_MUTEX_OMIT) 4007 void sqlite3MutexWarnOnContention(sqlite3_mutex*); 4008 #else 4009 # define sqlite3MutexWarnOnContention(x) 4010 #endif 4011 4012 #ifndef SQLITE_OMIT_FLOATING_POINT 4013 # define EXP754 (((u64)0x7ff)<<52) 4014 # define MAN754 ((((u64)1)<<52)-1) 4015 # define IsNaN(X) (((X)&EXP754)==EXP754 && ((X)&MAN754)!=0) 4016 int sqlite3IsNaN(double); 4017 #else 4018 # define IsNaN(X) 0 4019 # define sqlite3IsNaN(X) 0 4020 #endif 4021 4022 /* 4023 ** An instance of the following structure holds information about SQL 4024 ** functions arguments that are the parameters to the printf() function. 4025 */ 4026 struct PrintfArguments { 4027 int nArg; /* Total number of arguments */ 4028 int nUsed; /* Number of arguments used so far */ 4029 sqlite3_value **apArg; /* The argument values */ 4030 }; 4031 4032 char *sqlite3MPrintf(sqlite3*,const char*, ...); 4033 char *sqlite3VMPrintf(sqlite3*,const char*, va_list); 4034 #if defined(SQLITE_DEBUG) || defined(SQLITE_HAVE_OS_TRACE) 4035 void sqlite3DebugPrintf(const char*, ...); 4036 #endif 4037 #if defined(SQLITE_TEST) 4038 void *sqlite3TestTextToPtr(const char*); 4039 #endif 4040 4041 #if defined(SQLITE_DEBUG) 4042 void sqlite3TreeViewExpr(TreeView*, const Expr*, u8); 4043 void sqlite3TreeViewBareExprList(TreeView*, const ExprList*, const char*); 4044 void sqlite3TreeViewExprList(TreeView*, const ExprList*, u8, const char*); 4045 void sqlite3TreeViewSrcList(TreeView*, const SrcList*); 4046 void sqlite3TreeViewSelect(TreeView*, const Select*, u8); 4047 void sqlite3TreeViewWith(TreeView*, const With*, u8); 4048 #ifndef SQLITE_OMIT_WINDOWFUNC 4049 void sqlite3TreeViewWindow(TreeView*, const Window*, u8); 4050 void sqlite3TreeViewWinFunc(TreeView*, const Window*, u8); 4051 #endif 4052 #endif 4053 4054 4055 void sqlite3SetString(char **, sqlite3*, const char*); 4056 void sqlite3ErrorMsg(Parse*, const char*, ...); 4057 int sqlite3ErrorToParser(sqlite3*,int); 4058 void sqlite3Dequote(char*); 4059 void sqlite3DequoteExpr(Expr*); 4060 void sqlite3TokenInit(Token*,char*); 4061 int sqlite3KeywordCode(const unsigned char*, int); 4062 int sqlite3RunParser(Parse*, const char*, char **); 4063 void sqlite3FinishCoding(Parse*); 4064 int sqlite3GetTempReg(Parse*); 4065 void sqlite3ReleaseTempReg(Parse*,int); 4066 int sqlite3GetTempRange(Parse*,int); 4067 void sqlite3ReleaseTempRange(Parse*,int,int); 4068 void sqlite3ClearTempRegCache(Parse*); 4069 #ifdef SQLITE_DEBUG 4070 int sqlite3NoTempsInRange(Parse*,int,int); 4071 #endif 4072 Expr *sqlite3ExprAlloc(sqlite3*,int,const Token*,int); 4073 Expr *sqlite3Expr(sqlite3*,int,const char*); 4074 void sqlite3ExprAttachSubtrees(sqlite3*,Expr*,Expr*,Expr*); 4075 Expr *sqlite3PExpr(Parse*, int, Expr*, Expr*); 4076 void sqlite3PExprAddSelect(Parse*, Expr*, Select*); 4077 Expr *sqlite3ExprAnd(Parse*,Expr*, Expr*); 4078 Expr *sqlite3ExprSimplifiedAndOr(Expr*); 4079 Expr *sqlite3ExprFunction(Parse*,ExprList*, Token*, int); 4080 void sqlite3ExprFunctionUsable(Parse*,Expr*,FuncDef*); 4081 void sqlite3ExprAssignVarNumber(Parse*, Expr*, u32); 4082 void sqlite3ExprDelete(sqlite3*, Expr*); 4083 void sqlite3ExprUnmapAndDelete(Parse*, Expr*); 4084 ExprList *sqlite3ExprListAppend(Parse*,ExprList*,Expr*); 4085 ExprList *sqlite3ExprListAppendVector(Parse*,ExprList*,IdList*,Expr*); 4086 void sqlite3ExprListSetSortOrder(ExprList*,int,int); 4087 void sqlite3ExprListSetName(Parse*,ExprList*,Token*,int); 4088 void sqlite3ExprListSetSpan(Parse*,ExprList*,const char*,const char*); 4089 void sqlite3ExprListDelete(sqlite3*, ExprList*); 4090 u32 sqlite3ExprListFlags(const ExprList*); 4091 int sqlite3IndexHasDuplicateRootPage(Index*); 4092 int sqlite3Init(sqlite3*, char**); 4093 int sqlite3InitCallback(void*, int, char**, char**); 4094 int sqlite3InitOne(sqlite3*, int, char**, u32); 4095 void sqlite3Pragma(Parse*,Token*,Token*,Token*,int); 4096 #ifndef SQLITE_OMIT_VIRTUALTABLE 4097 Module *sqlite3PragmaVtabRegister(sqlite3*,const char *zName); 4098 #endif 4099 void sqlite3ResetAllSchemasOfConnection(sqlite3*); 4100 void sqlite3ResetOneSchema(sqlite3*,int); 4101 void sqlite3CollapseDatabaseArray(sqlite3*); 4102 void sqlite3CommitInternalChanges(sqlite3*); 4103 void sqlite3DeleteColumnNames(sqlite3*,Table*); 4104 int sqlite3ColumnsFromExprList(Parse*,ExprList*,i16*,Column**); 4105 void sqlite3SelectAddColumnTypeAndCollation(Parse*,Table*,Select*,char); 4106 Table *sqlite3ResultSetOfSelect(Parse*,Select*,char); 4107 void sqlite3OpenMasterTable(Parse *, int); 4108 Index *sqlite3PrimaryKeyIndex(Table*); 4109 i16 sqlite3TableColumnToIndex(Index*, i16); 4110 #ifdef SQLITE_OMIT_GENERATED_COLUMNS 4111 # define sqlite3TableColumnToStorage(T,X) (X) /* No-op pass-through */ 4112 # define sqlite3StorageColumnToTable(T,X) (X) /* No-op pass-through */ 4113 #else 4114 i16 sqlite3TableColumnToStorage(Table*, i16); 4115 i16 sqlite3StorageColumnToTable(Table*, i16); 4116 #endif 4117 void sqlite3StartTable(Parse*,Token*,Token*,int,int,int,int); 4118 #if SQLITE_ENABLE_HIDDEN_COLUMNS 4119 void sqlite3ColumnPropertiesFromName(Table*, Column*); 4120 #else 4121 # define sqlite3ColumnPropertiesFromName(T,C) /* no-op */ 4122 #endif 4123 void sqlite3AddColumn(Parse*,Token*,Token*); 4124 void sqlite3AddNotNull(Parse*, int); 4125 void sqlite3AddPrimaryKey(Parse*, ExprList*, int, int, int); 4126 void sqlite3AddCheckConstraint(Parse*, Expr*); 4127 void sqlite3AddDefaultValue(Parse*,Expr*,const char*,const char*); 4128 void sqlite3AddCollateType(Parse*, Token*); 4129 void sqlite3AddGenerated(Parse*,Expr*,Token*); 4130 void sqlite3EndTable(Parse*,Token*,Token*,u8,Select*); 4131 int sqlite3ParseUri(const char*,const char*,unsigned int*, 4132 sqlite3_vfs**,char**,char **); 4133 #define sqlite3CodecQueryParameters(A,B,C) 0 4134 Btree *sqlite3DbNameToBtree(sqlite3*,const char*); 4135 4136 #ifdef SQLITE_UNTESTABLE 4137 # define sqlite3FaultSim(X) SQLITE_OK 4138 #else 4139 int sqlite3FaultSim(int); 4140 #endif 4141 4142 Bitvec *sqlite3BitvecCreate(u32); 4143 int sqlite3BitvecTest(Bitvec*, u32); 4144 int sqlite3BitvecTestNotNull(Bitvec*, u32); 4145 int sqlite3BitvecSet(Bitvec*, u32); 4146 void sqlite3BitvecClear(Bitvec*, u32, void*); 4147 void sqlite3BitvecDestroy(Bitvec*); 4148 u32 sqlite3BitvecSize(Bitvec*); 4149 #ifndef SQLITE_UNTESTABLE 4150 int sqlite3BitvecBuiltinTest(int,int*); 4151 #endif 4152 4153 RowSet *sqlite3RowSetInit(sqlite3*); 4154 void sqlite3RowSetDelete(void*); 4155 void sqlite3RowSetClear(void*); 4156 void sqlite3RowSetInsert(RowSet*, i64); 4157 int sqlite3RowSetTest(RowSet*, int iBatch, i64); 4158 int sqlite3RowSetNext(RowSet*, i64*); 4159 4160 void sqlite3CreateView(Parse*,Token*,Token*,Token*,ExprList*,Select*,int,int); 4161 4162 #if !defined(SQLITE_OMIT_VIEW) || !defined(SQLITE_OMIT_VIRTUALTABLE) 4163 int sqlite3ViewGetColumnNames(Parse*,Table*); 4164 #else 4165 # define sqlite3ViewGetColumnNames(A,B) 0 4166 #endif 4167 4168 #if SQLITE_MAX_ATTACHED>30 4169 int sqlite3DbMaskAllZero(yDbMask); 4170 #endif 4171 void sqlite3DropTable(Parse*, SrcList*, int, int); 4172 void sqlite3CodeDropTable(Parse*, Table*, int, int); 4173 void sqlite3DeleteTable(sqlite3*, Table*); 4174 void sqlite3FreeIndex(sqlite3*, Index*); 4175 #ifndef SQLITE_OMIT_AUTOINCREMENT 4176 void sqlite3AutoincrementBegin(Parse *pParse); 4177 void sqlite3AutoincrementEnd(Parse *pParse); 4178 #else 4179 # define sqlite3AutoincrementBegin(X) 4180 # define sqlite3AutoincrementEnd(X) 4181 #endif 4182 void sqlite3Insert(Parse*, SrcList*, Select*, IdList*, int, Upsert*); 4183 #ifndef SQLITE_OMIT_GENERATED_COLUMNS 4184 void sqlite3ComputeGeneratedColumns(Parse*, int, Table*); 4185 #endif 4186 void *sqlite3ArrayAllocate(sqlite3*,void*,int,int*,int*); 4187 IdList *sqlite3IdListAppend(Parse*, IdList*, Token*); 4188 int sqlite3IdListIndex(IdList*,const char*); 4189 SrcList *sqlite3SrcListEnlarge(Parse*, SrcList*, int, int); 4190 SrcList *sqlite3SrcListAppend(Parse*, SrcList*, Token*, Token*); 4191 SrcList *sqlite3SrcListAppendFromTerm(Parse*, SrcList*, Token*, Token*, 4192 Token*, Select*, Expr*, IdList*); 4193 void sqlite3SrcListIndexedBy(Parse *, SrcList *, Token *); 4194 void sqlite3SrcListFuncArgs(Parse*, SrcList*, ExprList*); 4195 int sqlite3IndexedByLookup(Parse *, struct SrcList_item *); 4196 void sqlite3SrcListShiftJoinType(SrcList*); 4197 void sqlite3SrcListAssignCursors(Parse*, SrcList*); 4198 void sqlite3IdListDelete(sqlite3*, IdList*); 4199 void sqlite3SrcListDelete(sqlite3*, SrcList*); 4200 Index *sqlite3AllocateIndexObject(sqlite3*,i16,int,char**); 4201 void sqlite3CreateIndex(Parse*,Token*,Token*,SrcList*,ExprList*,int,Token*, 4202 Expr*, int, int, u8); 4203 void sqlite3DropIndex(Parse*, SrcList*, int); 4204 int sqlite3Select(Parse*, Select*, SelectDest*); 4205 Select *sqlite3SelectNew(Parse*,ExprList*,SrcList*,Expr*,ExprList*, 4206 Expr*,ExprList*,u32,Expr*); 4207 void sqlite3SelectDelete(sqlite3*, Select*); 4208 void sqlite3SelectReset(Parse*, Select*); 4209 Table *sqlite3SrcListLookup(Parse*, SrcList*); 4210 int sqlite3IsReadOnly(Parse*, Table*, int); 4211 void sqlite3OpenTable(Parse*, int iCur, int iDb, Table*, int); 4212 #if defined(SQLITE_ENABLE_UPDATE_DELETE_LIMIT) && !defined(SQLITE_OMIT_SUBQUERY) 4213 Expr *sqlite3LimitWhere(Parse*,SrcList*,Expr*,ExprList*,Expr*,char*); 4214 #endif 4215 void sqlite3DeleteFrom(Parse*, SrcList*, Expr*, ExprList*, Expr*); 4216 void sqlite3Update(Parse*, SrcList*, ExprList*,Expr*,int,ExprList*,Expr*, 4217 Upsert*); 4218 WhereInfo *sqlite3WhereBegin(Parse*,SrcList*,Expr*,ExprList*,ExprList*,u16,int); 4219 void sqlite3WhereEnd(WhereInfo*); 4220 LogEst sqlite3WhereOutputRowCount(WhereInfo*); 4221 int sqlite3WhereIsDistinct(WhereInfo*); 4222 int sqlite3WhereIsOrdered(WhereInfo*); 4223 int sqlite3WhereOrderByLimitOptLabel(WhereInfo*); 4224 int sqlite3WhereIsSorted(WhereInfo*); 4225 int sqlite3WhereContinueLabel(WhereInfo*); 4226 int sqlite3WhereBreakLabel(WhereInfo*); 4227 int sqlite3WhereOkOnePass(WhereInfo*, int*); 4228 #define ONEPASS_OFF 0 /* Use of ONEPASS not allowed */ 4229 #define ONEPASS_SINGLE 1 /* ONEPASS valid for a single row update */ 4230 #define ONEPASS_MULTI 2 /* ONEPASS is valid for multiple rows */ 4231 int sqlite3WhereUsesDeferredSeek(WhereInfo*); 4232 void sqlite3ExprCodeLoadIndexColumn(Parse*, Index*, int, int, int); 4233 int sqlite3ExprCodeGetColumn(Parse*, Table*, int, int, int, u8); 4234 void sqlite3ExprCodeGetColumnOfTable(Vdbe*, Table*, int, int, int); 4235 void sqlite3ExprCodeMove(Parse*, int, int, int); 4236 void sqlite3ExprCode(Parse*, Expr*, int); 4237 #ifndef SQLITE_OMIT_GENERATED_COLUMNS 4238 void sqlite3ExprCodeGeneratedColumn(Parse*, Column*, int); 4239 #endif 4240 void sqlite3ExprCodeCopy(Parse*, Expr*, int); 4241 void sqlite3ExprCodeFactorable(Parse*, Expr*, int); 4242 int sqlite3ExprCodeRunJustOnce(Parse*, Expr*, int); 4243 int sqlite3ExprCodeTemp(Parse*, Expr*, int*); 4244 int sqlite3ExprCodeTarget(Parse*, Expr*, int); 4245 int sqlite3ExprCodeExprList(Parse*, ExprList*, int, int, u8); 4246 #define SQLITE_ECEL_DUP 0x01 /* Deep, not shallow copies */ 4247 #define SQLITE_ECEL_FACTOR 0x02 /* Factor out constant terms */ 4248 #define SQLITE_ECEL_REF 0x04 /* Use ExprList.u.x.iOrderByCol */ 4249 #define SQLITE_ECEL_OMITREF 0x08 /* Omit if ExprList.u.x.iOrderByCol */ 4250 void sqlite3ExprIfTrue(Parse*, Expr*, int, int); 4251 void sqlite3ExprIfFalse(Parse*, Expr*, int, int); 4252 void sqlite3ExprIfFalseDup(Parse*, Expr*, int, int); 4253 Table *sqlite3FindTable(sqlite3*,const char*, const char*); 4254 #define LOCATE_VIEW 0x01 4255 #define LOCATE_NOERR 0x02 4256 Table *sqlite3LocateTable(Parse*,u32 flags,const char*, const char*); 4257 Table *sqlite3LocateTableItem(Parse*,u32 flags,struct SrcList_item *); 4258 Index *sqlite3FindIndex(sqlite3*,const char*, const char*); 4259 void sqlite3UnlinkAndDeleteTable(sqlite3*,int,const char*); 4260 void sqlite3UnlinkAndDeleteIndex(sqlite3*,int,const char*); 4261 void sqlite3Vacuum(Parse*,Token*,Expr*); 4262 int sqlite3RunVacuum(char**, sqlite3*, int, sqlite3_value*); 4263 char *sqlite3NameFromToken(sqlite3*, Token*); 4264 int sqlite3ExprCompare(Parse*,Expr*, Expr*, int); 4265 int sqlite3ExprCompareSkip(Expr*, Expr*, int); 4266 int sqlite3ExprListCompare(ExprList*, ExprList*, int); 4267 int sqlite3ExprImpliesExpr(Parse*,Expr*, Expr*, int); 4268 int sqlite3ExprImpliesNonNullRow(Expr*,int); 4269 void sqlite3ExprAnalyzeAggregates(NameContext*, Expr*); 4270 void sqlite3ExprAnalyzeAggList(NameContext*,ExprList*); 4271 int sqlite3ExprCoveredByIndex(Expr*, int iCur, Index *pIdx); 4272 int sqlite3FunctionUsesThisSrc(Expr*, SrcList*); 4273 Vdbe *sqlite3GetVdbe(Parse*); 4274 #ifndef SQLITE_UNTESTABLE 4275 void sqlite3PrngSaveState(void); 4276 void sqlite3PrngRestoreState(void); 4277 #endif 4278 void sqlite3RollbackAll(sqlite3*,int); 4279 void sqlite3CodeVerifySchema(Parse*, int); 4280 void sqlite3CodeVerifyNamedSchema(Parse*, const char *zDb); 4281 void sqlite3BeginTransaction(Parse*, int); 4282 void sqlite3EndTransaction(Parse*,int); 4283 void sqlite3Savepoint(Parse*, int, Token*); 4284 void sqlite3CloseSavepoints(sqlite3 *); 4285 void sqlite3LeaveMutexAndCloseZombie(sqlite3*); 4286 u32 sqlite3IsTrueOrFalse(const char*); 4287 int sqlite3ExprIdToTrueFalse(Expr*); 4288 int sqlite3ExprTruthValue(const Expr*); 4289 int sqlite3ExprIsConstant(Expr*); 4290 int sqlite3ExprIsConstantNotJoin(Expr*); 4291 int sqlite3ExprIsConstantOrFunction(Expr*, u8); 4292 int sqlite3ExprIsConstantOrGroupBy(Parse*, Expr*, ExprList*); 4293 int sqlite3ExprIsTableConstant(Expr*,int); 4294 #ifdef SQLITE_ENABLE_CURSOR_HINTS 4295 int sqlite3ExprContainsSubquery(Expr*); 4296 #endif 4297 int sqlite3ExprIsInteger(Expr*, int*); 4298 int sqlite3ExprCanBeNull(const Expr*); 4299 int sqlite3ExprNeedsNoAffinityChange(const Expr*, char); 4300 int sqlite3IsRowid(const char*); 4301 void sqlite3GenerateRowDelete( 4302 Parse*,Table*,Trigger*,int,int,int,i16,u8,u8,u8,int); 4303 void sqlite3GenerateRowIndexDelete(Parse*, Table*, int, int, int*, int); 4304 int sqlite3GenerateIndexKey(Parse*, Index*, int, int, int, int*,Index*,int); 4305 void sqlite3ResolvePartIdxLabel(Parse*,int); 4306 int sqlite3ExprReferencesUpdatedColumn(Expr*,int*,int); 4307 void sqlite3GenerateConstraintChecks(Parse*,Table*,int*,int,int,int,int, 4308 u8,u8,int,int*,int*,Upsert*); 4309 #ifdef SQLITE_ENABLE_NULL_TRIM 4310 void sqlite3SetMakeRecordP5(Vdbe*,Table*); 4311 #else 4312 # define sqlite3SetMakeRecordP5(A,B) 4313 #endif 4314 void sqlite3CompleteInsertion(Parse*,Table*,int,int,int,int*,int,int,int); 4315 int sqlite3OpenTableAndIndices(Parse*, Table*, int, u8, int, u8*, int*, int*); 4316 void sqlite3BeginWriteOperation(Parse*, int, int); 4317 void sqlite3MultiWrite(Parse*); 4318 void sqlite3MayAbort(Parse*); 4319 void sqlite3HaltConstraint(Parse*, int, int, char*, i8, u8); 4320 void sqlite3UniqueConstraint(Parse*, int, Index*); 4321 void sqlite3RowidConstraint(Parse*, int, Table*); 4322 Expr *sqlite3ExprDup(sqlite3*,Expr*,int); 4323 ExprList *sqlite3ExprListDup(sqlite3*,ExprList*,int); 4324 SrcList *sqlite3SrcListDup(sqlite3*,SrcList*,int); 4325 IdList *sqlite3IdListDup(sqlite3*,IdList*); 4326 Select *sqlite3SelectDup(sqlite3*,Select*,int); 4327 FuncDef *sqlite3FunctionSearch(int,const char*); 4328 void sqlite3InsertBuiltinFuncs(FuncDef*,int); 4329 FuncDef *sqlite3FindFunction(sqlite3*,const char*,int,u8,u8); 4330 void sqlite3RegisterBuiltinFunctions(void); 4331 void sqlite3RegisterDateTimeFunctions(void); 4332 void sqlite3RegisterPerConnectionBuiltinFunctions(sqlite3*); 4333 int sqlite3SafetyCheckOk(sqlite3*); 4334 int sqlite3SafetyCheckSickOrOk(sqlite3*); 4335 void sqlite3ChangeCookie(Parse*, int); 4336 4337 #if !defined(SQLITE_OMIT_VIEW) && !defined(SQLITE_OMIT_TRIGGER) 4338 void sqlite3MaterializeView(Parse*, Table*, Expr*, ExprList*,Expr*,int); 4339 #endif 4340 4341 #ifndef SQLITE_OMIT_TRIGGER 4342 void sqlite3BeginTrigger(Parse*, Token*,Token*,int,int,IdList*,SrcList*, 4343 Expr*,int, int); 4344 void sqlite3FinishTrigger(Parse*, TriggerStep*, Token*); 4345 void sqlite3DropTrigger(Parse*, SrcList*, int); 4346 void sqlite3DropTriggerPtr(Parse*, Trigger*); 4347 Trigger *sqlite3TriggersExist(Parse *, Table*, int, ExprList*, int *pMask); 4348 Trigger *sqlite3TriggerList(Parse *, Table *); 4349 void sqlite3CodeRowTrigger(Parse*, Trigger *, int, ExprList*, int, Table *, 4350 int, int, int); 4351 void sqlite3CodeRowTriggerDirect(Parse *, Trigger *, Table *, int, int, int); 4352 void sqliteViewTriggers(Parse*, Table*, Expr*, int, ExprList*); 4353 void sqlite3DeleteTriggerStep(sqlite3*, TriggerStep*); 4354 TriggerStep *sqlite3TriggerSelectStep(sqlite3*,Select*, 4355 const char*,const char*); 4356 TriggerStep *sqlite3TriggerInsertStep(Parse*,Token*, IdList*, 4357 Select*,u8,Upsert*, 4358 const char*,const char*); 4359 TriggerStep *sqlite3TriggerUpdateStep(Parse*,Token*,ExprList*, Expr*, u8, 4360 const char*,const char*); 4361 TriggerStep *sqlite3TriggerDeleteStep(Parse*,Token*, Expr*, 4362 const char*,const char*); 4363 void sqlite3DeleteTrigger(sqlite3*, Trigger*); 4364 void sqlite3UnlinkAndDeleteTrigger(sqlite3*,int,const char*); 4365 u32 sqlite3TriggerColmask(Parse*,Trigger*,ExprList*,int,int,Table*,int); 4366 # define sqlite3ParseToplevel(p) ((p)->pToplevel ? (p)->pToplevel : (p)) 4367 # define sqlite3IsToplevel(p) ((p)->pToplevel==0) 4368 #else 4369 # define sqlite3TriggersExist(B,C,D,E,F) 0 4370 # define sqlite3DeleteTrigger(A,B) 4371 # define sqlite3DropTriggerPtr(A,B) 4372 # define sqlite3UnlinkAndDeleteTrigger(A,B,C) 4373 # define sqlite3CodeRowTrigger(A,B,C,D,E,F,G,H,I) 4374 # define sqlite3CodeRowTriggerDirect(A,B,C,D,E,F) 4375 # define sqlite3TriggerList(X, Y) 0 4376 # define sqlite3ParseToplevel(p) p 4377 # define sqlite3IsToplevel(p) 1 4378 # define sqlite3TriggerColmask(A,B,C,D,E,F,G) 0 4379 #endif 4380 4381 int sqlite3JoinType(Parse*, Token*, Token*, Token*); 4382 void sqlite3SetJoinExpr(Expr*,int); 4383 void sqlite3CreateForeignKey(Parse*, ExprList*, Token*, ExprList*, int); 4384 void sqlite3DeferForeignKey(Parse*, int); 4385 #ifndef SQLITE_OMIT_AUTHORIZATION 4386 void sqlite3AuthRead(Parse*,Expr*,Schema*,SrcList*); 4387 int sqlite3AuthCheck(Parse*,int, const char*, const char*, const char*); 4388 void sqlite3AuthContextPush(Parse*, AuthContext*, const char*); 4389 void sqlite3AuthContextPop(AuthContext*); 4390 int sqlite3AuthReadCol(Parse*, const char *, const char *, int); 4391 #else 4392 # define sqlite3AuthRead(a,b,c,d) 4393 # define sqlite3AuthCheck(a,b,c,d,e) SQLITE_OK 4394 # define sqlite3AuthContextPush(a,b,c) 4395 # define sqlite3AuthContextPop(a) ((void)(a)) 4396 #endif 4397 void sqlite3Attach(Parse*, Expr*, Expr*, Expr*); 4398 void sqlite3Detach(Parse*, Expr*); 4399 void sqlite3FixInit(DbFixer*, Parse*, int, const char*, const Token*); 4400 int sqlite3FixSrcList(DbFixer*, SrcList*); 4401 int sqlite3FixSelect(DbFixer*, Select*); 4402 int sqlite3FixExpr(DbFixer*, Expr*); 4403 int sqlite3FixExprList(DbFixer*, ExprList*); 4404 int sqlite3FixTriggerStep(DbFixer*, TriggerStep*); 4405 int sqlite3RealSameAsInt(double,sqlite3_int64); 4406 int sqlite3AtoF(const char *z, double*, int, u8); 4407 int sqlite3GetInt32(const char *, int*); 4408 int sqlite3Atoi(const char*); 4409 #ifndef SQLITE_OMIT_UTF16 4410 int sqlite3Utf16ByteLen(const void *pData, int nChar); 4411 #endif 4412 int sqlite3Utf8CharLen(const char *pData, int nByte); 4413 u32 sqlite3Utf8Read(const u8**); 4414 LogEst sqlite3LogEst(u64); 4415 LogEst sqlite3LogEstAdd(LogEst,LogEst); 4416 #ifndef SQLITE_OMIT_VIRTUALTABLE 4417 LogEst sqlite3LogEstFromDouble(double); 4418 #endif 4419 #if defined(SQLITE_ENABLE_STMT_SCANSTATUS) || \ 4420 defined(SQLITE_ENABLE_STAT4) || \ 4421 defined(SQLITE_EXPLAIN_ESTIMATED_ROWS) 4422 u64 sqlite3LogEstToInt(LogEst); 4423 #endif 4424 VList *sqlite3VListAdd(sqlite3*,VList*,const char*,int,int); 4425 const char *sqlite3VListNumToName(VList*,int); 4426 int sqlite3VListNameToNum(VList*,const char*,int); 4427 4428 /* 4429 ** Routines to read and write variable-length integers. These used to 4430 ** be defined locally, but now we use the varint routines in the util.c 4431 ** file. 4432 */ 4433 int sqlite3PutVarint(unsigned char*, u64); 4434 u8 sqlite3GetVarint(const unsigned char *, u64 *); 4435 u8 sqlite3GetVarint32(const unsigned char *, u32 *); 4436 int sqlite3VarintLen(u64 v); 4437 4438 /* 4439 ** The common case is for a varint to be a single byte. They following 4440 ** macros handle the common case without a procedure call, but then call 4441 ** the procedure for larger varints. 4442 */ 4443 #define getVarint32(A,B) \ 4444 (u8)((*(A)<(u8)0x80)?((B)=(u32)*(A)),1:sqlite3GetVarint32((A),(u32 *)&(B))) 4445 #define getVarint32NR(A,B) \ 4446 B=(u32)*(A);if(B>=0x80)sqlite3GetVarint32((A),(u32*)&(B)) 4447 #define putVarint32(A,B) \ 4448 (u8)(((u32)(B)<(u32)0x80)?(*(A)=(unsigned char)(B)),1:\ 4449 sqlite3PutVarint((A),(B))) 4450 #define getVarint sqlite3GetVarint 4451 #define putVarint sqlite3PutVarint 4452 4453 4454 const char *sqlite3IndexAffinityStr(sqlite3*, Index*); 4455 void sqlite3TableAffinity(Vdbe*, Table*, int); 4456 char sqlite3CompareAffinity(const Expr *pExpr, char aff2); 4457 int sqlite3IndexAffinityOk(const Expr *pExpr, char idx_affinity); 4458 char sqlite3TableColumnAffinity(Table*,int); 4459 char sqlite3ExprAffinity(const Expr *pExpr); 4460 int sqlite3Atoi64(const char*, i64*, int, u8); 4461 int sqlite3DecOrHexToI64(const char*, i64*); 4462 void sqlite3ErrorWithMsg(sqlite3*, int, const char*,...); 4463 void sqlite3Error(sqlite3*,int); 4464 void sqlite3SystemError(sqlite3*,int); 4465 void *sqlite3HexToBlob(sqlite3*, const char *z, int n); 4466 u8 sqlite3HexToInt(int h); 4467 int sqlite3TwoPartName(Parse *, Token *, Token *, Token **); 4468 4469 #if defined(SQLITE_NEED_ERR_NAME) 4470 const char *sqlite3ErrName(int); 4471 #endif 4472 4473 #ifdef SQLITE_ENABLE_DESERIALIZE 4474 int sqlite3MemdbInit(void); 4475 #endif 4476 4477 const char *sqlite3ErrStr(int); 4478 int sqlite3ReadSchema(Parse *pParse); 4479 CollSeq *sqlite3FindCollSeq(sqlite3*,u8 enc, const char*,int); 4480 int sqlite3IsBinary(const CollSeq*); 4481 CollSeq *sqlite3LocateCollSeq(Parse *pParse, const char*zName); 4482 void sqlite3SetTextEncoding(sqlite3 *db, u8); 4483 CollSeq *sqlite3ExprCollSeq(Parse *pParse, const Expr *pExpr); 4484 CollSeq *sqlite3ExprNNCollSeq(Parse *pParse, const Expr *pExpr); 4485 int sqlite3ExprCollSeqMatch(Parse*,const Expr*,const Expr*); 4486 Expr *sqlite3ExprAddCollateToken(Parse *pParse, Expr*, const Token*, int); 4487 Expr *sqlite3ExprAddCollateString(Parse*,Expr*,const char*); 4488 Expr *sqlite3ExprSkipCollate(Expr*); 4489 Expr *sqlite3ExprSkipCollateAndLikely(Expr*); 4490 int sqlite3CheckCollSeq(Parse *, CollSeq *); 4491 int sqlite3WritableSchema(sqlite3*); 4492 int sqlite3CheckObjectName(Parse*, const char*,const char*,const char*); 4493 void sqlite3VdbeSetChanges(sqlite3 *, int); 4494 int sqlite3AddInt64(i64*,i64); 4495 int sqlite3SubInt64(i64*,i64); 4496 int sqlite3MulInt64(i64*,i64); 4497 int sqlite3AbsInt32(int); 4498 #ifdef SQLITE_ENABLE_8_3_NAMES 4499 void sqlite3FileSuffix3(const char*, char*); 4500 #else 4501 # define sqlite3FileSuffix3(X,Y) 4502 #endif 4503 u8 sqlite3GetBoolean(const char *z,u8); 4504 4505 const void *sqlite3ValueText(sqlite3_value*, u8); 4506 int sqlite3ValueBytes(sqlite3_value*, u8); 4507 void sqlite3ValueSetStr(sqlite3_value*, int, const void *,u8, 4508 void(*)(void*)); 4509 void sqlite3ValueSetNull(sqlite3_value*); 4510 void sqlite3ValueFree(sqlite3_value*); 4511 #ifndef SQLITE_UNTESTABLE 4512 void sqlite3ResultIntReal(sqlite3_context*); 4513 #endif 4514 sqlite3_value *sqlite3ValueNew(sqlite3 *); 4515 #ifndef SQLITE_OMIT_UTF16 4516 char *sqlite3Utf16to8(sqlite3 *, const void*, int, u8); 4517 #endif 4518 int sqlite3ValueFromExpr(sqlite3 *, Expr *, u8, u8, sqlite3_value **); 4519 void sqlite3ValueApplyAffinity(sqlite3_value *, u8, u8); 4520 #ifndef SQLITE_AMALGAMATION 4521 extern const unsigned char sqlite3OpcodeProperty[]; 4522 extern const char sqlite3StrBINARY[]; 4523 extern const unsigned char sqlite3UpperToLower[]; 4524 extern const unsigned char sqlite3CtypeMap[]; 4525 extern SQLITE_WSD struct Sqlite3Config sqlite3Config; 4526 extern FuncDefHash sqlite3BuiltinFunctions; 4527 #ifndef SQLITE_OMIT_WSD 4528 extern int sqlite3PendingByte; 4529 #endif 4530 #endif 4531 #ifdef VDBE_PROFILE 4532 extern sqlite3_uint64 sqlite3NProfileCnt; 4533 #endif 4534 void sqlite3RootPageMoved(sqlite3*, int, int, int); 4535 void sqlite3Reindex(Parse*, Token*, Token*); 4536 void sqlite3AlterFunctions(void); 4537 void sqlite3AlterRenameTable(Parse*, SrcList*, Token*); 4538 void sqlite3AlterRenameColumn(Parse*, SrcList*, Token*, Token*); 4539 int sqlite3GetToken(const unsigned char *, int *); 4540 void sqlite3NestedParse(Parse*, const char*, ...); 4541 void sqlite3ExpirePreparedStatements(sqlite3*, int); 4542 void sqlite3CodeRhsOfIN(Parse*, Expr*, int); 4543 int sqlite3CodeSubselect(Parse*, Expr*); 4544 void sqlite3SelectPrep(Parse*, Select*, NameContext*); 4545 void sqlite3SelectWrongNumTermsError(Parse *pParse, Select *p); 4546 int sqlite3MatchEName( 4547 const struct ExprList_item*, 4548 const char*, 4549 const char*, 4550 const char* 4551 ); 4552 int sqlite3ResolveExprNames(NameContext*, Expr*); 4553 int sqlite3ResolveExprListNames(NameContext*, ExprList*); 4554 void sqlite3ResolveSelectNames(Parse*, Select*, NameContext*); 4555 int sqlite3ResolveSelfReference(Parse*,Table*,int,Expr*,ExprList*); 4556 int sqlite3ResolveOrderGroupBy(Parse*, Select*, ExprList*, const char*); 4557 void sqlite3ColumnDefault(Vdbe *, Table *, int, int); 4558 void sqlite3AlterFinishAddColumn(Parse *, Token *); 4559 void sqlite3AlterBeginAddColumn(Parse *, SrcList *); 4560 void *sqlite3RenameTokenMap(Parse*, void*, Token*); 4561 void sqlite3RenameTokenRemap(Parse*, void *pTo, void *pFrom); 4562 void sqlite3RenameExprUnmap(Parse*, Expr*); 4563 void sqlite3RenameExprlistUnmap(Parse*, ExprList*); 4564 CollSeq *sqlite3GetCollSeq(Parse*, u8, CollSeq *, const char*); 4565 char sqlite3AffinityType(const char*, Column*); 4566 void sqlite3Analyze(Parse*, Token*, Token*); 4567 int sqlite3InvokeBusyHandler(BusyHandler*, sqlite3_file*); 4568 int sqlite3FindDb(sqlite3*, Token*); 4569 int sqlite3FindDbName(sqlite3 *, const char *); 4570 int sqlite3AnalysisLoad(sqlite3*,int iDB); 4571 void sqlite3DeleteIndexSamples(sqlite3*,Index*); 4572 void sqlite3DefaultRowEst(Index*); 4573 void sqlite3RegisterLikeFunctions(sqlite3*, int); 4574 int sqlite3IsLikeFunction(sqlite3*,Expr*,int*,char*); 4575 void sqlite3SchemaClear(void *); 4576 Schema *sqlite3SchemaGet(sqlite3 *, Btree *); 4577 int sqlite3SchemaToIndex(sqlite3 *db, Schema *); 4578 KeyInfo *sqlite3KeyInfoAlloc(sqlite3*,int,int); 4579 void sqlite3KeyInfoUnref(KeyInfo*); 4580 KeyInfo *sqlite3KeyInfoRef(KeyInfo*); 4581 KeyInfo *sqlite3KeyInfoOfIndex(Parse*, Index*); 4582 KeyInfo *sqlite3KeyInfoFromExprList(Parse*, ExprList*, int, int); 4583 int sqlite3HasExplicitNulls(Parse*, ExprList*); 4584 4585 #ifdef SQLITE_DEBUG 4586 int sqlite3KeyInfoIsWriteable(KeyInfo*); 4587 #endif 4588 int sqlite3CreateFunc(sqlite3 *, const char *, int, int, void *, 4589 void (*)(sqlite3_context*,int,sqlite3_value **), 4590 void (*)(sqlite3_context*,int,sqlite3_value **), 4591 void (*)(sqlite3_context*), 4592 void (*)(sqlite3_context*), 4593 void (*)(sqlite3_context*,int,sqlite3_value **), 4594 FuncDestructor *pDestructor 4595 ); 4596 void sqlite3NoopDestructor(void*); 4597 void sqlite3OomFault(sqlite3*); 4598 void sqlite3OomClear(sqlite3*); 4599 int sqlite3ApiExit(sqlite3 *db, int); 4600 int sqlite3OpenTempDatabase(Parse *); 4601 4602 void sqlite3StrAccumInit(StrAccum*, sqlite3*, char*, int, int); 4603 char *sqlite3StrAccumFinish(StrAccum*); 4604 void sqlite3SelectDestInit(SelectDest*,int,int); 4605 Expr *sqlite3CreateColumnExpr(sqlite3 *, SrcList *, int, int); 4606 4607 void sqlite3BackupRestart(sqlite3_backup *); 4608 void sqlite3BackupUpdate(sqlite3_backup *, Pgno, const u8 *); 4609 4610 #ifndef SQLITE_OMIT_SUBQUERY 4611 int sqlite3ExprCheckIN(Parse*, Expr*); 4612 #else 4613 # define sqlite3ExprCheckIN(x,y) SQLITE_OK 4614 #endif 4615 4616 #ifdef SQLITE_ENABLE_STAT4 4617 int sqlite3Stat4ProbeSetValue( 4618 Parse*,Index*,UnpackedRecord**,Expr*,int,int,int*); 4619 int sqlite3Stat4ValueFromExpr(Parse*, Expr*, u8, sqlite3_value**); 4620 void sqlite3Stat4ProbeFree(UnpackedRecord*); 4621 int sqlite3Stat4Column(sqlite3*, const void*, int, int, sqlite3_value**); 4622 char sqlite3IndexColumnAffinity(sqlite3*, Index*, int); 4623 #endif 4624 4625 /* 4626 ** The interface to the LEMON-generated parser 4627 */ 4628 #ifndef SQLITE_AMALGAMATION 4629 void *sqlite3ParserAlloc(void*(*)(u64), Parse*); 4630 void sqlite3ParserFree(void*, void(*)(void*)); 4631 #endif 4632 void sqlite3Parser(void*, int, Token); 4633 int sqlite3ParserFallback(int); 4634 #ifdef YYTRACKMAXSTACKDEPTH 4635 int sqlite3ParserStackPeak(void*); 4636 #endif 4637 4638 void sqlite3AutoLoadExtensions(sqlite3*); 4639 #ifndef SQLITE_OMIT_LOAD_EXTENSION 4640 void sqlite3CloseExtensions(sqlite3*); 4641 #else 4642 # define sqlite3CloseExtensions(X) 4643 #endif 4644 4645 #ifndef SQLITE_OMIT_SHARED_CACHE 4646 void sqlite3TableLock(Parse *, int, int, u8, const char *); 4647 #else 4648 #define sqlite3TableLock(v,w,x,y,z) 4649 #endif 4650 4651 #ifdef SQLITE_TEST 4652 int sqlite3Utf8To8(unsigned char*); 4653 #endif 4654 4655 #ifdef SQLITE_OMIT_VIRTUALTABLE 4656 # define sqlite3VtabClear(Y) 4657 # define sqlite3VtabSync(X,Y) SQLITE_OK 4658 # define sqlite3VtabRollback(X) 4659 # define sqlite3VtabCommit(X) 4660 # define sqlite3VtabInSync(db) 0 4661 # define sqlite3VtabLock(X) 4662 # define sqlite3VtabUnlock(X) 4663 # define sqlite3VtabModuleUnref(D,X) 4664 # define sqlite3VtabUnlockList(X) 4665 # define sqlite3VtabSavepoint(X, Y, Z) SQLITE_OK 4666 # define sqlite3GetVTable(X,Y) ((VTable*)0) 4667 #else 4668 void sqlite3VtabClear(sqlite3 *db, Table*); 4669 void sqlite3VtabDisconnect(sqlite3 *db, Table *p); 4670 int sqlite3VtabSync(sqlite3 *db, Vdbe*); 4671 int sqlite3VtabRollback(sqlite3 *db); 4672 int sqlite3VtabCommit(sqlite3 *db); 4673 void sqlite3VtabLock(VTable *); 4674 void sqlite3VtabUnlock(VTable *); 4675 void sqlite3VtabModuleUnref(sqlite3*,Module*); 4676 void sqlite3VtabUnlockList(sqlite3*); 4677 int sqlite3VtabSavepoint(sqlite3 *, int, int); 4678 void sqlite3VtabImportErrmsg(Vdbe*, sqlite3_vtab*); 4679 VTable *sqlite3GetVTable(sqlite3*, Table*); 4680 Module *sqlite3VtabCreateModule( 4681 sqlite3*, 4682 const char*, 4683 const sqlite3_module*, 4684 void*, 4685 void(*)(void*) 4686 ); 4687 # define sqlite3VtabInSync(db) ((db)->nVTrans>0 && (db)->aVTrans==0) 4688 #endif 4689 int sqlite3ReadOnlyShadowTables(sqlite3 *db); 4690 #ifndef SQLITE_OMIT_VIRTUALTABLE 4691 int sqlite3ShadowTableName(sqlite3 *db, const char *zName); 4692 #else 4693 # define sqlite3ShadowTableName(A,B) 0 4694 #endif 4695 int sqlite3VtabEponymousTableInit(Parse*,Module*); 4696 void sqlite3VtabEponymousTableClear(sqlite3*,Module*); 4697 void sqlite3VtabMakeWritable(Parse*,Table*); 4698 void sqlite3VtabBeginParse(Parse*, Token*, Token*, Token*, int); 4699 void sqlite3VtabFinishParse(Parse*, Token*); 4700 void sqlite3VtabArgInit(Parse*); 4701 void sqlite3VtabArgExtend(Parse*, Token*); 4702 int sqlite3VtabCallCreate(sqlite3*, int, const char *, char **); 4703 int sqlite3VtabCallConnect(Parse*, Table*); 4704 int sqlite3VtabCallDestroy(sqlite3*, int, const char *); 4705 int sqlite3VtabBegin(sqlite3 *, VTable *); 4706 FuncDef *sqlite3VtabOverloadFunction(sqlite3 *,FuncDef*, int nArg, Expr*); 4707 sqlite3_int64 sqlite3StmtCurrentTime(sqlite3_context*); 4708 int sqlite3VdbeParameterIndex(Vdbe*, const char*, int); 4709 int sqlite3TransferBindings(sqlite3_stmt *, sqlite3_stmt *); 4710 void sqlite3ParserReset(Parse*); 4711 #ifdef SQLITE_ENABLE_NORMALIZE 4712 char *sqlite3Normalize(Vdbe*, const char*); 4713 #endif 4714 int sqlite3Reprepare(Vdbe*); 4715 void sqlite3ExprListCheckLength(Parse*, ExprList*, const char*); 4716 CollSeq *sqlite3ExprCompareCollSeq(Parse*,const Expr*); 4717 CollSeq *sqlite3BinaryCompareCollSeq(Parse *, const Expr*, const Expr*); 4718 int sqlite3TempInMemory(const sqlite3*); 4719 const char *sqlite3JournalModename(int); 4720 #ifndef SQLITE_OMIT_WAL 4721 int sqlite3Checkpoint(sqlite3*, int, int, int*, int*); 4722 int sqlite3WalDefaultHook(void*,sqlite3*,const char*,int); 4723 #endif 4724 #ifndef SQLITE_OMIT_CTE 4725 With *sqlite3WithAdd(Parse*,With*,Token*,ExprList*,Select*); 4726 void sqlite3WithDelete(sqlite3*,With*); 4727 void sqlite3WithPush(Parse*, With*, u8); 4728 #else 4729 #define sqlite3WithPush(x,y,z) 4730 #define sqlite3WithDelete(x,y) 4731 #endif 4732 #ifndef SQLITE_OMIT_UPSERT 4733 Upsert *sqlite3UpsertNew(sqlite3*,ExprList*,Expr*,ExprList*,Expr*); 4734 void sqlite3UpsertDelete(sqlite3*,Upsert*); 4735 Upsert *sqlite3UpsertDup(sqlite3*,Upsert*); 4736 int sqlite3UpsertAnalyzeTarget(Parse*,SrcList*,Upsert*); 4737 void sqlite3UpsertDoUpdate(Parse*,Upsert*,Table*,Index*,int); 4738 #else 4739 #define sqlite3UpsertNew(v,w,x,y,z) ((Upsert*)0) 4740 #define sqlite3UpsertDelete(x,y) 4741 #define sqlite3UpsertDup(x,y) ((Upsert*)0) 4742 #endif 4743 4744 4745 /* Declarations for functions in fkey.c. All of these are replaced by 4746 ** no-op macros if OMIT_FOREIGN_KEY is defined. In this case no foreign 4747 ** key functionality is available. If OMIT_TRIGGER is defined but 4748 ** OMIT_FOREIGN_KEY is not, only some of the functions are no-oped. In 4749 ** this case foreign keys are parsed, but no other functionality is 4750 ** provided (enforcement of FK constraints requires the triggers sub-system). 4751 */ 4752 #if !defined(SQLITE_OMIT_FOREIGN_KEY) && !defined(SQLITE_OMIT_TRIGGER) 4753 void sqlite3FkCheck(Parse*, Table*, int, int, int*, int); 4754 void sqlite3FkDropTable(Parse*, SrcList *, Table*); 4755 void sqlite3FkActions(Parse*, Table*, ExprList*, int, int*, int); 4756 int sqlite3FkRequired(Parse*, Table*, int*, int); 4757 u32 sqlite3FkOldmask(Parse*, Table*); 4758 FKey *sqlite3FkReferences(Table *); 4759 #else 4760 #define sqlite3FkActions(a,b,c,d,e,f) 4761 #define sqlite3FkCheck(a,b,c,d,e,f) 4762 #define sqlite3FkDropTable(a,b,c) 4763 #define sqlite3FkOldmask(a,b) 0 4764 #define sqlite3FkRequired(a,b,c,d) 0 4765 #define sqlite3FkReferences(a) 0 4766 #endif 4767 #ifndef SQLITE_OMIT_FOREIGN_KEY 4768 void sqlite3FkDelete(sqlite3 *, Table*); 4769 int sqlite3FkLocateIndex(Parse*,Table*,FKey*,Index**,int**); 4770 #else 4771 #define sqlite3FkDelete(a,b) 4772 #define sqlite3FkLocateIndex(a,b,c,d,e) 4773 #endif 4774 4775 4776 /* 4777 ** Available fault injectors. Should be numbered beginning with 0. 4778 */ 4779 #define SQLITE_FAULTINJECTOR_MALLOC 0 4780 #define SQLITE_FAULTINJECTOR_COUNT 1 4781 4782 /* 4783 ** The interface to the code in fault.c used for identifying "benign" 4784 ** malloc failures. This is only present if SQLITE_UNTESTABLE 4785 ** is not defined. 4786 */ 4787 #ifndef SQLITE_UNTESTABLE 4788 void sqlite3BeginBenignMalloc(void); 4789 void sqlite3EndBenignMalloc(void); 4790 #else 4791 #define sqlite3BeginBenignMalloc() 4792 #define sqlite3EndBenignMalloc() 4793 #endif 4794 4795 /* 4796 ** Allowed return values from sqlite3FindInIndex() 4797 */ 4798 #define IN_INDEX_ROWID 1 /* Search the rowid of the table */ 4799 #define IN_INDEX_EPH 2 /* Search an ephemeral b-tree */ 4800 #define IN_INDEX_INDEX_ASC 3 /* Existing index ASCENDING */ 4801 #define IN_INDEX_INDEX_DESC 4 /* Existing index DESCENDING */ 4802 #define IN_INDEX_NOOP 5 /* No table available. Use comparisons */ 4803 /* 4804 ** Allowed flags for the 3rd parameter to sqlite3FindInIndex(). 4805 */ 4806 #define IN_INDEX_NOOP_OK 0x0001 /* OK to return IN_INDEX_NOOP */ 4807 #define IN_INDEX_MEMBERSHIP 0x0002 /* IN operator used for membership test */ 4808 #define IN_INDEX_LOOP 0x0004 /* IN operator used as a loop */ 4809 int sqlite3FindInIndex(Parse *, Expr *, u32, int*, int*, int*); 4810 4811 int sqlite3JournalOpen(sqlite3_vfs *, const char *, sqlite3_file *, int, int); 4812 int sqlite3JournalSize(sqlite3_vfs *); 4813 #if defined(SQLITE_ENABLE_ATOMIC_WRITE) \ 4814 || defined(SQLITE_ENABLE_BATCH_ATOMIC_WRITE) 4815 int sqlite3JournalCreate(sqlite3_file *); 4816 #endif 4817 4818 int sqlite3JournalIsInMemory(sqlite3_file *p); 4819 void sqlite3MemJournalOpen(sqlite3_file *); 4820 4821 void sqlite3ExprSetHeightAndFlags(Parse *pParse, Expr *p); 4822 #if SQLITE_MAX_EXPR_DEPTH>0 4823 int sqlite3SelectExprHeight(Select *); 4824 int sqlite3ExprCheckHeight(Parse*, int); 4825 #else 4826 #define sqlite3SelectExprHeight(x) 0 4827 #define sqlite3ExprCheckHeight(x,y) 4828 #endif 4829 4830 u32 sqlite3Get4byte(const u8*); 4831 void sqlite3Put4byte(u8*, u32); 4832 4833 #ifdef SQLITE_ENABLE_UNLOCK_NOTIFY 4834 void sqlite3ConnectionBlocked(sqlite3 *, sqlite3 *); 4835 void sqlite3ConnectionUnlocked(sqlite3 *db); 4836 void sqlite3ConnectionClosed(sqlite3 *db); 4837 #else 4838 #define sqlite3ConnectionBlocked(x,y) 4839 #define sqlite3ConnectionUnlocked(x) 4840 #define sqlite3ConnectionClosed(x) 4841 #endif 4842 4843 #ifdef SQLITE_DEBUG 4844 void sqlite3ParserTrace(FILE*, char *); 4845 #endif 4846 #if defined(YYCOVERAGE) 4847 int sqlite3ParserCoverage(FILE*); 4848 #endif 4849 4850 /* 4851 ** If the SQLITE_ENABLE IOTRACE exists then the global variable 4852 ** sqlite3IoTrace is a pointer to a printf-like routine used to 4853 ** print I/O tracing messages. 4854 */ 4855 #ifdef SQLITE_ENABLE_IOTRACE 4856 # define IOTRACE(A) if( sqlite3IoTrace ){ sqlite3IoTrace A; } 4857 void sqlite3VdbeIOTraceSql(Vdbe*); 4858 SQLITE_API SQLITE_EXTERN void (SQLITE_CDECL *sqlite3IoTrace)(const char*,...); 4859 #else 4860 # define IOTRACE(A) 4861 # define sqlite3VdbeIOTraceSql(X) 4862 #endif 4863 4864 /* 4865 ** These routines are available for the mem2.c debugging memory allocator 4866 ** only. They are used to verify that different "types" of memory 4867 ** allocations are properly tracked by the system. 4868 ** 4869 ** sqlite3MemdebugSetType() sets the "type" of an allocation to one of 4870 ** the MEMTYPE_* macros defined below. The type must be a bitmask with 4871 ** a single bit set. 4872 ** 4873 ** sqlite3MemdebugHasType() returns true if any of the bits in its second 4874 ** argument match the type set by the previous sqlite3MemdebugSetType(). 4875 ** sqlite3MemdebugHasType() is intended for use inside assert() statements. 4876 ** 4877 ** sqlite3MemdebugNoType() returns true if none of the bits in its second 4878 ** argument match the type set by the previous sqlite3MemdebugSetType(). 4879 ** 4880 ** Perhaps the most important point is the difference between MEMTYPE_HEAP 4881 ** and MEMTYPE_LOOKASIDE. If an allocation is MEMTYPE_LOOKASIDE, that means 4882 ** it might have been allocated by lookaside, except the allocation was 4883 ** too large or lookaside was already full. It is important to verify 4884 ** that allocations that might have been satisfied by lookaside are not 4885 ** passed back to non-lookaside free() routines. Asserts such as the 4886 ** example above are placed on the non-lookaside free() routines to verify 4887 ** this constraint. 4888 ** 4889 ** All of this is no-op for a production build. It only comes into 4890 ** play when the SQLITE_MEMDEBUG compile-time option is used. 4891 */ 4892 #ifdef SQLITE_MEMDEBUG 4893 void sqlite3MemdebugSetType(void*,u8); 4894 int sqlite3MemdebugHasType(void*,u8); 4895 int sqlite3MemdebugNoType(void*,u8); 4896 #else 4897 # define sqlite3MemdebugSetType(X,Y) /* no-op */ 4898 # define sqlite3MemdebugHasType(X,Y) 1 4899 # define sqlite3MemdebugNoType(X,Y) 1 4900 #endif 4901 #define MEMTYPE_HEAP 0x01 /* General heap allocations */ 4902 #define MEMTYPE_LOOKASIDE 0x02 /* Heap that might have been lookaside */ 4903 #define MEMTYPE_PCACHE 0x04 /* Page cache allocations */ 4904 4905 /* 4906 ** Threading interface 4907 */ 4908 #if SQLITE_MAX_WORKER_THREADS>0 4909 int sqlite3ThreadCreate(SQLiteThread**,void*(*)(void*),void*); 4910 int sqlite3ThreadJoin(SQLiteThread*, void**); 4911 #endif 4912 4913 #if defined(SQLITE_ENABLE_DBPAGE_VTAB) || defined(SQLITE_TEST) 4914 int sqlite3DbpageRegister(sqlite3*); 4915 #endif 4916 #if defined(SQLITE_ENABLE_DBSTAT_VTAB) || defined(SQLITE_TEST) 4917 int sqlite3DbstatRegister(sqlite3*); 4918 #endif 4919 4920 int sqlite3ExprVectorSize(Expr *pExpr); 4921 int sqlite3ExprIsVector(Expr *pExpr); 4922 Expr *sqlite3VectorFieldSubexpr(Expr*, int); 4923 Expr *sqlite3ExprForVectorField(Parse*,Expr*,int); 4924 void sqlite3VectorErrorMsg(Parse*, Expr*); 4925 4926 #ifndef SQLITE_OMIT_COMPILEOPTION_DIAGS 4927 const char **sqlite3CompileOptions(int *pnOpt); 4928 #endif 4929 4930 #endif /* SQLITEINT_H */ 4931