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 ** @(#) $Id: sqliteInt.h,v 1.691 2008/04/10 16:47:42 drh Exp $ 15 */ 16 #ifndef _SQLITEINT_H_ 17 #define _SQLITEINT_H_ 18 19 /* 20 ** Include the configuration header output by 'configure' if it was run 21 ** (otherwise we get an empty default). 22 */ 23 #include "config.h" 24 #include "sqliteLimit.h" 25 26 /* Disable nuisance warnings on Borland compilers */ 27 #if defined(__BORLANDC__) 28 #pragma warn -rch /* unreachable code */ 29 #pragma warn -ccc /* Condition is always true or false */ 30 #pragma warn -aus /* Assigned value is never used */ 31 #pragma warn -csu /* Comparing signed and unsigned */ 32 #pragma warn -spa /* Suspicous pointer arithmetic */ 33 #endif 34 35 /* Needed for various definitions... */ 36 #define _GNU_SOURCE 37 38 /* 39 ** Include standard header files as necessary 40 */ 41 #ifdef HAVE_STDINT_H 42 #include <stdint.h> 43 #endif 44 #ifdef HAVE_INTTYPES_H 45 #include <inttypes.h> 46 #endif 47 48 /* 49 ** If possible, use the C99 intptr_t type to define an integral type of 50 ** equivalent size to a pointer. (Technically it's >= sizeof(void *), but 51 ** practically it's == sizeof(void *)). We fall back to an int if this type 52 ** isn't defined. 53 */ 54 #ifdef HAVE_INTPTR_T 55 typedef intptr_t sqlite3_intptr_t; 56 #else 57 typedef int sqlite3_intptr_t; 58 #endif 59 60 /* 61 ** A macro used to aid in coverage testing. When doing coverage 62 ** testing, the condition inside the argument must be evaluated 63 ** both true and false in order to get full branch coverage. 64 ** This macro can be inserted to ensure adequate test coverage 65 ** in places where simple condition/decision coverage is inadequate. 66 */ 67 #ifdef SQLITE_COVERAGE_TEST 68 void sqlite3Coverage(int); 69 # define testcase(X) if( X ){ sqlite3Coverage(__LINE__); } 70 #else 71 # define testcase(X) 72 #endif 73 74 75 /* 76 ** The macro unlikely() is a hint that surrounds a boolean 77 ** expression that is usually false. Macro likely() surrounds 78 ** a boolean expression that is usually true. GCC is able to 79 ** use these hints to generate better code, sometimes. 80 */ 81 #if defined(__GNUC__) && 0 82 # define likely(X) __builtin_expect((X),1) 83 # define unlikely(X) __builtin_expect((X),0) 84 #else 85 # define likely(X) !!(X) 86 # define unlikely(X) !!(X) 87 #endif 88 89 90 /* 91 ** These #defines should enable >2GB file support on Posix if the 92 ** underlying operating system supports it. If the OS lacks 93 ** large file support, or if the OS is windows, these should be no-ops. 94 ** 95 ** Ticket #2739: The _LARGEFILE_SOURCE macro must appear before any 96 ** system #includes. Hence, this block of code must be the very first 97 ** code in all source files. 98 ** 99 ** Large file support can be disabled using the -DSQLITE_DISABLE_LFS switch 100 ** on the compiler command line. This is necessary if you are compiling 101 ** on a recent machine (ex: RedHat 7.2) but you want your code to work 102 ** on an older machine (ex: RedHat 6.0). If you compile on RedHat 7.2 103 ** without this option, LFS is enable. But LFS does not exist in the kernel 104 ** in RedHat 6.0, so the code won't work. Hence, for maximum binary 105 ** portability you should omit LFS. 106 ** 107 ** Similar is true for MacOS. LFS is only supported on MacOS 9 and later. 108 */ 109 #ifndef SQLITE_DISABLE_LFS 110 # define _LARGE_FILE 1 111 # ifndef _FILE_OFFSET_BITS 112 # define _FILE_OFFSET_BITS 64 113 # endif 114 # define _LARGEFILE_SOURCE 1 115 #endif 116 117 118 /* 119 ** The SQLITE_THREADSAFE macro must be defined as either 0 or 1. 120 ** Older versions of SQLite used an optional THREADSAFE macro. 121 ** We support that for legacy 122 */ 123 #if !defined(SQLITE_THREADSAFE) 124 #if defined(THREADSAFE) 125 # define SQLITE_THREADSAFE THREADSAFE 126 #else 127 # define SQLITE_THREADSAFE 1 128 #endif 129 #endif 130 131 /* 132 ** Exactly one of the following macros must be defined in order to 133 ** specify which memory allocation subsystem to use. 134 ** 135 ** SQLITE_SYSTEM_MALLOC // Use normal system malloc() 136 ** SQLITE_MEMDEBUG // Debugging version of system malloc() 137 ** SQLITE_MEMORY_SIZE // internal allocator #1 138 ** SQLITE_MMAP_HEAP_SIZE // internal mmap() allocator 139 ** SQLITE_POW2_MEMORY_SIZE // internal power-of-two allocator 140 ** 141 ** If none of the above are defined, then set SQLITE_SYSTEM_MALLOC as 142 ** the default. 143 */ 144 #if defined(SQLITE_SYSTEM_MALLOC)+defined(SQLITE_MEMDEBUG)+\ 145 defined(SQLITE_MEMORY_SIZE)+defined(SQLITE_MMAP_HEAP_SIZE)+\ 146 defined(SQLITE_POW2_MEMORY_SIZE)>1 147 # error "At most one of the following compile-time configuration options\ 148 is allows: SQLITE_SYSTEM_MALLOC, SQLITE_MEMDEBUG, SQLITE_MEMORY_SIZE,\ 149 SQLITE_MMAP_HEAP_SIZE, SQLITE_POW2_MEMORY_SIZE" 150 #endif 151 #if defined(SQLITE_SYSTEM_MALLOC)+defined(SQLITE_MEMDEBUG)+\ 152 defined(SQLITE_MEMORY_SIZE)+defined(SQLITE_MMAP_HEAP_SIZE)+\ 153 defined(SQLITE_POW2_MEMORY_SIZE)==0 154 # define SQLITE_SYSTEM_MALLOC 1 155 #endif 156 157 /* 158 ** If SQLITE_MALLOC_SOFT_LIMIT is defined, then try to keep the 159 ** sizes of memory allocations below this value where possible. 160 */ 161 #if defined(SQLITE_POW2_MEMORY_SIZE) && !defined(SQLITE_MALLOC_SOFT_LIMIT) 162 # define SQLITE_MALLOC_SOFT_LIMIT 1024 163 #endif 164 165 /* 166 ** We need to define _XOPEN_SOURCE as follows in order to enable 167 ** recursive mutexes on most unix systems. But Mac OS X is different. 168 ** The _XOPEN_SOURCE define causes problems for Mac OS X we are told, 169 ** so it is omitted there. See ticket #2673. 170 ** 171 ** Later we learn that _XOPEN_SOURCE is poorly or incorrectly 172 ** implemented on some systems. So we avoid defining it at all 173 ** if it is already defined or if it is unneeded because we are 174 ** not doing a threadsafe build. Ticket #2681. 175 ** 176 ** See also ticket #2741. 177 */ 178 #if !defined(_XOPEN_SOURCE) && !defined(__DARWIN__) && !defined(__APPLE__) && SQLITE_THREADSAFE 179 # define _XOPEN_SOURCE 500 /* Needed to enable pthread recursive mutexes */ 180 #endif 181 182 #if defined(SQLITE_TCL) || defined(TCLSH) 183 # include <tcl.h> 184 #endif 185 186 /* 187 ** Many people are failing to set -DNDEBUG=1 when compiling SQLite. 188 ** Setting NDEBUG makes the code smaller and run faster. So the following 189 ** lines are added to automatically set NDEBUG unless the -DSQLITE_DEBUG=1 190 ** option is set. Thus NDEBUG becomes an opt-in rather than an opt-out 191 ** feature. 192 */ 193 #if !defined(NDEBUG) && !defined(SQLITE_DEBUG) 194 # define NDEBUG 1 195 #endif 196 197 #include "sqlite3.h" 198 #include "hash.h" 199 #include "parse.h" 200 #include <stdio.h> 201 #include <stdlib.h> 202 #include <string.h> 203 #include <assert.h> 204 #include <stddef.h> 205 206 #define sqlite3_isnan(X) ((X)!=(X)) 207 208 /* 209 ** If compiling for a processor that lacks floating point support, 210 ** substitute integer for floating-point 211 */ 212 #ifdef SQLITE_OMIT_FLOATING_POINT 213 # define double sqlite_int64 214 # define LONGDOUBLE_TYPE sqlite_int64 215 # ifndef SQLITE_BIG_DBL 216 # define SQLITE_BIG_DBL (0x7fffffffffffffff) 217 # endif 218 # define SQLITE_OMIT_DATETIME_FUNCS 1 219 # define SQLITE_OMIT_TRACE 1 220 # undef SQLITE_MIXED_ENDIAN_64BIT_FLOAT 221 #endif 222 #ifndef SQLITE_BIG_DBL 223 # define SQLITE_BIG_DBL (1e99) 224 #endif 225 226 /* 227 ** OMIT_TEMPDB is set to 1 if SQLITE_OMIT_TEMPDB is defined, or 0 228 ** afterward. Having this macro allows us to cause the C compiler 229 ** to omit code used by TEMP tables without messy #ifndef statements. 230 */ 231 #ifdef SQLITE_OMIT_TEMPDB 232 #define OMIT_TEMPDB 1 233 #else 234 #define OMIT_TEMPDB 0 235 #endif 236 237 /* 238 ** If the following macro is set to 1, then NULL values are considered 239 ** distinct when determining whether or not two entries are the same 240 ** in a UNIQUE index. This is the way PostgreSQL, Oracle, DB2, MySQL, 241 ** OCELOT, and Firebird all work. The SQL92 spec explicitly says this 242 ** is the way things are suppose to work. 243 ** 244 ** If the following macro is set to 0, the NULLs are indistinct for 245 ** a UNIQUE index. In this mode, you can only have a single NULL entry 246 ** for a column declared UNIQUE. This is the way Informix and SQL Server 247 ** work. 248 */ 249 #define NULL_DISTINCT_FOR_UNIQUE 1 250 251 /* 252 ** The "file format" number is an integer that is incremented whenever 253 ** the VDBE-level file format changes. The following macros define the 254 ** the default file format for new databases and the maximum file format 255 ** that the library can read. 256 */ 257 #define SQLITE_MAX_FILE_FORMAT 4 258 #ifndef SQLITE_DEFAULT_FILE_FORMAT 259 # define SQLITE_DEFAULT_FILE_FORMAT 1 260 #endif 261 262 /* 263 ** Provide a default value for TEMP_STORE in case it is not specified 264 ** on the command-line 265 */ 266 #ifndef TEMP_STORE 267 # define TEMP_STORE 1 268 #endif 269 270 /* 271 ** GCC does not define the offsetof() macro so we'll have to do it 272 ** ourselves. 273 */ 274 #ifndef offsetof 275 #define offsetof(STRUCTURE,FIELD) ((int)((char*)&((STRUCTURE*)0)->FIELD)) 276 #endif 277 278 /* 279 ** Check to see if this machine uses EBCDIC. (Yes, believe it or 280 ** not, there are still machines out there that use EBCDIC.) 281 */ 282 #if 'A' == '\301' 283 # define SQLITE_EBCDIC 1 284 #else 285 # define SQLITE_ASCII 1 286 #endif 287 288 /* 289 ** Integers of known sizes. These typedefs might change for architectures 290 ** where the sizes very. Preprocessor macros are available so that the 291 ** types can be conveniently redefined at compile-type. Like this: 292 ** 293 ** cc '-DUINTPTR_TYPE=long long int' ... 294 */ 295 #ifndef UINT32_TYPE 296 # ifdef HAVE_UINT32_T 297 # define UINT32_TYPE uint32_t 298 # else 299 # define UINT32_TYPE unsigned int 300 # endif 301 #endif 302 #ifndef UINT16_TYPE 303 # ifdef HAVE_UINT16_T 304 # define UINT16_TYPE uint16_t 305 # else 306 # define UINT16_TYPE unsigned short int 307 # endif 308 #endif 309 #ifndef INT16_TYPE 310 # ifdef HAVE_INT16_T 311 # define INT16_TYPE int16_t 312 # else 313 # define INT16_TYPE short int 314 # endif 315 #endif 316 #ifndef UINT8_TYPE 317 # ifdef HAVE_UINT8_T 318 # define UINT8_TYPE uint8_t 319 # else 320 # define UINT8_TYPE unsigned char 321 # endif 322 #endif 323 #ifndef INT8_TYPE 324 # ifdef HAVE_INT8_T 325 # define INT8_TYPE int8_t 326 # else 327 # define INT8_TYPE signed char 328 # endif 329 #endif 330 #ifndef LONGDOUBLE_TYPE 331 # define LONGDOUBLE_TYPE long double 332 #endif 333 typedef sqlite_int64 i64; /* 8-byte signed integer */ 334 typedef sqlite_uint64 u64; /* 8-byte unsigned integer */ 335 typedef UINT32_TYPE u32; /* 4-byte unsigned integer */ 336 typedef UINT16_TYPE u16; /* 2-byte unsigned integer */ 337 typedef INT16_TYPE i16; /* 2-byte signed integer */ 338 typedef UINT8_TYPE u8; /* 1-byte unsigned integer */ 339 typedef UINT8_TYPE i8; /* 1-byte signed integer */ 340 341 /* 342 ** Macros to determine whether the machine is big or little endian, 343 ** evaluated at runtime. 344 */ 345 #ifdef SQLITE_AMALGAMATION 346 const int sqlite3one; 347 #else 348 extern const int sqlite3one; 349 #endif 350 #if defined(i386) || defined(__i386__) || defined(_M_IX86) 351 # define SQLITE_BIGENDIAN 0 352 # define SQLITE_LITTLEENDIAN 1 353 # define SQLITE_UTF16NATIVE SQLITE_UTF16LE 354 #else 355 # define SQLITE_BIGENDIAN (*(char *)(&sqlite3one)==0) 356 # define SQLITE_LITTLEENDIAN (*(char *)(&sqlite3one)==1) 357 # define SQLITE_UTF16NATIVE (SQLITE_BIGENDIAN?SQLITE_UTF16BE:SQLITE_UTF16LE) 358 #endif 359 360 /* 361 ** An instance of the following structure is used to store the busy-handler 362 ** callback for a given sqlite handle. 363 ** 364 ** The sqlite.busyHandler member of the sqlite struct contains the busy 365 ** callback for the database handle. Each pager opened via the sqlite 366 ** handle is passed a pointer to sqlite.busyHandler. The busy-handler 367 ** callback is currently invoked only from within pager.c. 368 */ 369 typedef struct BusyHandler BusyHandler; 370 struct BusyHandler { 371 int (*xFunc)(void *,int); /* The busy callback */ 372 void *pArg; /* First arg to busy callback */ 373 int nBusy; /* Incremented with each busy call */ 374 }; 375 376 /* 377 ** Name of the master database table. The master database table 378 ** is a special table that holds the names and attributes of all 379 ** user tables and indices. 380 */ 381 #define MASTER_NAME "sqlite_master" 382 #define TEMP_MASTER_NAME "sqlite_temp_master" 383 384 /* 385 ** The root-page of the master database table. 386 */ 387 #define MASTER_ROOT 1 388 389 /* 390 ** The name of the schema table. 391 */ 392 #define SCHEMA_TABLE(x) ((!OMIT_TEMPDB)&&(x==1)?TEMP_MASTER_NAME:MASTER_NAME) 393 394 /* 395 ** A convenience macro that returns the number of elements in 396 ** an array. 397 */ 398 #define ArraySize(X) (sizeof(X)/sizeof(X[0])) 399 400 /* 401 ** Forward references to structures 402 */ 403 typedef struct AggInfo AggInfo; 404 typedef struct AuthContext AuthContext; 405 typedef struct Bitvec Bitvec; 406 typedef struct CollSeq CollSeq; 407 typedef struct Column Column; 408 typedef struct Db Db; 409 typedef struct Schema Schema; 410 typedef struct Expr Expr; 411 typedef struct ExprList ExprList; 412 typedef struct FKey FKey; 413 typedef struct FuncDef FuncDef; 414 typedef struct IdList IdList; 415 typedef struct Index Index; 416 typedef struct KeyClass KeyClass; 417 typedef struct KeyInfo KeyInfo; 418 typedef struct Module Module; 419 typedef struct NameContext NameContext; 420 typedef struct Parse Parse; 421 typedef struct Select Select; 422 typedef struct SrcList SrcList; 423 typedef struct StrAccum StrAccum; 424 typedef struct Table Table; 425 typedef struct TableLock TableLock; 426 typedef struct Token Token; 427 typedef struct TriggerStack TriggerStack; 428 typedef struct TriggerStep TriggerStep; 429 typedef struct Trigger Trigger; 430 typedef struct WhereInfo WhereInfo; 431 typedef struct WhereLevel WhereLevel; 432 433 /* 434 ** Defer sourcing vdbe.h and btree.h until after the "u8" and 435 ** "BusyHandler" typedefs. vdbe.h also requires a few of the opaque 436 ** pointer types (i.e. FuncDef) defined above. 437 */ 438 #include "btree.h" 439 #include "vdbe.h" 440 #include "pager.h" 441 442 #include "os.h" 443 #include "mutex.h" 444 445 446 /* 447 ** Each database file to be accessed by the system is an instance 448 ** of the following structure. There are normally two of these structures 449 ** in the sqlite.aDb[] array. aDb[0] is the main database file and 450 ** aDb[1] is the database file used to hold temporary tables. Additional 451 ** databases may be attached. 452 */ 453 struct Db { 454 char *zName; /* Name of this database */ 455 Btree *pBt; /* The B*Tree structure for this database file */ 456 u8 inTrans; /* 0: not writable. 1: Transaction. 2: Checkpoint */ 457 u8 safety_level; /* How aggressive at synching data to disk */ 458 void *pAux; /* Auxiliary data. Usually NULL */ 459 void (*xFreeAux)(void*); /* Routine to free pAux */ 460 Schema *pSchema; /* Pointer to database schema (possibly shared) */ 461 }; 462 463 /* 464 ** An instance of the following structure stores a database schema. 465 ** 466 ** If there are no virtual tables configured in this schema, the 467 ** Schema.db variable is set to NULL. After the first virtual table 468 ** has been added, it is set to point to the database connection 469 ** used to create the connection. Once a virtual table has been 470 ** added to the Schema structure and the Schema.db variable populated, 471 ** only that database connection may use the Schema to prepare 472 ** statements. 473 */ 474 struct Schema { 475 int schema_cookie; /* Database schema version number for this file */ 476 Hash tblHash; /* All tables indexed by name */ 477 Hash idxHash; /* All (named) indices indexed by name */ 478 Hash trigHash; /* All triggers indexed by name */ 479 Hash aFKey; /* Foreign keys indexed by to-table */ 480 Table *pSeqTab; /* The sqlite_sequence table used by AUTOINCREMENT */ 481 u8 file_format; /* Schema format version for this file */ 482 u8 enc; /* Text encoding used by this database */ 483 u16 flags; /* Flags associated with this schema */ 484 int cache_size; /* Number of pages to use in the cache */ 485 #ifndef SQLITE_OMIT_VIRTUALTABLE 486 sqlite3 *db; /* "Owner" connection. See comment above */ 487 #endif 488 }; 489 490 /* 491 ** These macros can be used to test, set, or clear bits in the 492 ** Db.flags field. 493 */ 494 #define DbHasProperty(D,I,P) (((D)->aDb[I].pSchema->flags&(P))==(P)) 495 #define DbHasAnyProperty(D,I,P) (((D)->aDb[I].pSchema->flags&(P))!=0) 496 #define DbSetProperty(D,I,P) (D)->aDb[I].pSchema->flags|=(P) 497 #define DbClearProperty(D,I,P) (D)->aDb[I].pSchema->flags&=~(P) 498 499 /* 500 ** Allowed values for the DB.flags field. 501 ** 502 ** The DB_SchemaLoaded flag is set after the database schema has been 503 ** read into internal hash tables. 504 ** 505 ** DB_UnresetViews means that one or more views have column names that 506 ** have been filled out. If the schema changes, these column names might 507 ** changes and so the view will need to be reset. 508 */ 509 #define DB_SchemaLoaded 0x0001 /* The schema has been loaded */ 510 #define DB_UnresetViews 0x0002 /* Some views have defined column names */ 511 #define DB_Empty 0x0004 /* The file is empty (length 0 bytes) */ 512 513 /* 514 ** The number of different kinds of things that can be limited 515 ** using the sqlite3_limit() interface. 516 */ 517 #define SQLITE_N_LIMIT (SQLITE_LIMIT_VARIABLE_NUMBER+1) 518 519 /* 520 ** Each database is an instance of the following structure. 521 ** 522 ** The sqlite.lastRowid records the last insert rowid generated by an 523 ** insert statement. Inserts on views do not affect its value. Each 524 ** trigger has its own context, so that lastRowid can be updated inside 525 ** triggers as usual. The previous value will be restored once the trigger 526 ** exits. Upon entering a before or instead of trigger, lastRowid is no 527 ** longer (since after version 2.8.12) reset to -1. 528 ** 529 ** The sqlite.nChange does not count changes within triggers and keeps no 530 ** context. It is reset at start of sqlite3_exec. 531 ** The sqlite.lsChange represents the number of changes made by the last 532 ** insert, update, or delete statement. It remains constant throughout the 533 ** length of a statement and is then updated by OP_SetCounts. It keeps a 534 ** context stack just like lastRowid so that the count of changes 535 ** within a trigger is not seen outside the trigger. Changes to views do not 536 ** affect the value of lsChange. 537 ** The sqlite.csChange keeps track of the number of current changes (since 538 ** the last statement) and is used to update sqlite_lsChange. 539 ** 540 ** The member variables sqlite.errCode, sqlite.zErrMsg and sqlite.zErrMsg16 541 ** store the most recent error code and, if applicable, string. The 542 ** internal function sqlite3Error() is used to set these variables 543 ** consistently. 544 */ 545 struct sqlite3 { 546 sqlite3_vfs *pVfs; /* OS Interface */ 547 int nDb; /* Number of backends currently in use */ 548 Db *aDb; /* All backends */ 549 int flags; /* Miscellanous flags. See below */ 550 int openFlags; /* Flags passed to sqlite3_vfs.xOpen() */ 551 int errCode; /* Most recent error code (SQLITE_*) */ 552 int errMask; /* & result codes with this before returning */ 553 u8 autoCommit; /* The auto-commit flag. */ 554 u8 temp_store; /* 1: file 2: memory 0: default */ 555 u8 mallocFailed; /* True if we have seen a malloc failure */ 556 signed char nextAutovac; /* Autovac setting after VACUUM if >=0 */ 557 int nextPagesize; /* Pagesize after VACUUM if >0 */ 558 int nTable; /* Number of tables in the database */ 559 CollSeq *pDfltColl; /* The default collating sequence (BINARY) */ 560 i64 lastRowid; /* ROWID of most recent insert (see above) */ 561 i64 priorNewRowid; /* Last randomly generated ROWID */ 562 int magic; /* Magic number for detect library misuse */ 563 int nChange; /* Value returned by sqlite3_changes() */ 564 int nTotalChange; /* Value returned by sqlite3_total_changes() */ 565 sqlite3_mutex *mutex; /* Connection mutex */ 566 int aLimit[SQLITE_N_LIMIT]; /* Limits */ 567 struct sqlite3InitInfo { /* Information used during initialization */ 568 int iDb; /* When back is being initialized */ 569 int newTnum; /* Rootpage of table being initialized */ 570 u8 busy; /* TRUE if currently initializing */ 571 } init; 572 int nExtension; /* Number of loaded extensions */ 573 void **aExtension; /* Array of shared libraray handles */ 574 struct Vdbe *pVdbe; /* List of active virtual machines */ 575 int activeVdbeCnt; /* Number of vdbes currently executing */ 576 void (*xTrace)(void*,const char*); /* Trace function */ 577 void *pTraceArg; /* Argument to the trace function */ 578 void (*xProfile)(void*,const char*,u64); /* Profiling function */ 579 void *pProfileArg; /* Argument to profile function */ 580 void *pCommitArg; /* Argument to xCommitCallback() */ 581 int (*xCommitCallback)(void*); /* Invoked at every commit. */ 582 void *pRollbackArg; /* Argument to xRollbackCallback() */ 583 void (*xRollbackCallback)(void*); /* Invoked at every commit. */ 584 void *pUpdateArg; 585 void (*xUpdateCallback)(void*,int, const char*,const char*,sqlite_int64); 586 void(*xCollNeeded)(void*,sqlite3*,int eTextRep,const char*); 587 void(*xCollNeeded16)(void*,sqlite3*,int eTextRep,const void*); 588 void *pCollNeededArg; 589 sqlite3_value *pErr; /* Most recent error message */ 590 char *zErrMsg; /* Most recent error message (UTF-8 encoded) */ 591 char *zErrMsg16; /* Most recent error message (UTF-16 encoded) */ 592 union { 593 int isInterrupted; /* True if sqlite3_interrupt has been called */ 594 double notUsed1; /* Spacer */ 595 } u1; 596 #ifndef SQLITE_OMIT_AUTHORIZATION 597 int (*xAuth)(void*,int,const char*,const char*,const char*,const char*); 598 /* Access authorization function */ 599 void *pAuthArg; /* 1st argument to the access auth function */ 600 #endif 601 #ifndef SQLITE_OMIT_PROGRESS_CALLBACK 602 int (*xProgress)(void *); /* The progress callback */ 603 void *pProgressArg; /* Argument to the progress callback */ 604 int nProgressOps; /* Number of opcodes for progress callback */ 605 #endif 606 #ifndef SQLITE_OMIT_VIRTUALTABLE 607 Hash aModule; /* populated by sqlite3_create_module() */ 608 Table *pVTab; /* vtab with active Connect/Create method */ 609 sqlite3_vtab **aVTrans; /* Virtual tables with open transactions */ 610 int nVTrans; /* Allocated size of aVTrans */ 611 #endif 612 Hash aFunc; /* All functions that can be in SQL exprs */ 613 Hash aCollSeq; /* All collating sequences */ 614 BusyHandler busyHandler; /* Busy callback */ 615 int busyTimeout; /* Busy handler timeout, in msec */ 616 Db aDbStatic[2]; /* Static space for the 2 default backends */ 617 #ifdef SQLITE_SSE 618 sqlite3_stmt *pFetch; /* Used by SSE to fetch stored statements */ 619 #endif 620 u8 dfltLockMode; /* Default locking-mode for attached dbs */ 621 }; 622 623 /* 624 ** A macro to discover the encoding of a database. 625 */ 626 #define ENC(db) ((db)->aDb[0].pSchema->enc) 627 628 /* 629 ** Possible values for the sqlite.flags and or Db.flags fields. 630 ** 631 ** On sqlite.flags, the SQLITE_InTrans value means that we have 632 ** executed a BEGIN. On Db.flags, SQLITE_InTrans means a statement 633 ** transaction is active on that particular database file. 634 */ 635 #define SQLITE_VdbeTrace 0x00000001 /* True to trace VDBE execution */ 636 #define SQLITE_InTrans 0x00000008 /* True if in a transaction */ 637 #define SQLITE_InternChanges 0x00000010 /* Uncommitted Hash table changes */ 638 #define SQLITE_FullColNames 0x00000020 /* Show full column names on SELECT */ 639 #define SQLITE_ShortColNames 0x00000040 /* Show short columns names */ 640 #define SQLITE_CountRows 0x00000080 /* Count rows changed by INSERT, */ 641 /* DELETE, or UPDATE and return */ 642 /* the count using a callback. */ 643 #define SQLITE_NullCallback 0x00000100 /* Invoke the callback once if the */ 644 /* result set is empty */ 645 #define SQLITE_SqlTrace 0x00000200 /* Debug print SQL as it executes */ 646 #define SQLITE_VdbeListing 0x00000400 /* Debug listings of VDBE programs */ 647 #define SQLITE_WriteSchema 0x00000800 /* OK to update SQLITE_MASTER */ 648 #define SQLITE_NoReadlock 0x00001000 /* Readlocks are omitted when 649 ** accessing read-only databases */ 650 #define SQLITE_IgnoreChecks 0x00002000 /* Do not enforce check constraints */ 651 #define SQLITE_ReadUncommitted 0x00004000 /* For shared-cache mode */ 652 #define SQLITE_LegacyFileFmt 0x00008000 /* Create new databases in format 1 */ 653 #define SQLITE_FullFSync 0x00010000 /* Use full fsync on the backend */ 654 #define SQLITE_LoadExtension 0x00020000 /* Enable load_extension */ 655 656 #define SQLITE_RecoveryMode 0x00040000 /* Ignore schema errors */ 657 #define SQLITE_SharedCache 0x00080000 /* Cache sharing is enabled */ 658 #define SQLITE_Vtab 0x00100000 /* There exists a virtual table */ 659 660 /* 661 ** Possible values for the sqlite.magic field. 662 ** The numbers are obtained at random and have no special meaning, other 663 ** than being distinct from one another. 664 */ 665 #define SQLITE_MAGIC_OPEN 0xa029a697 /* Database is open */ 666 #define SQLITE_MAGIC_CLOSED 0x9f3c2d33 /* Database is closed */ 667 #define SQLITE_MAGIC_SICK 0x4b771290 /* Error and awaiting close */ 668 #define SQLITE_MAGIC_BUSY 0xf03b7906 /* Database currently in use */ 669 #define SQLITE_MAGIC_ERROR 0xb5357930 /* An SQLITE_MISUSE error occurred */ 670 671 /* 672 ** Each SQL function is defined by an instance of the following 673 ** structure. A pointer to this structure is stored in the sqlite.aFunc 674 ** hash table. When multiple functions have the same name, the hash table 675 ** points to a linked list of these structures. 676 */ 677 struct FuncDef { 678 i16 nArg; /* Number of arguments. -1 means unlimited */ 679 u8 iPrefEnc; /* Preferred text encoding (SQLITE_UTF8, 16LE, 16BE) */ 680 u8 needCollSeq; /* True if sqlite3GetFuncCollSeq() might be called */ 681 u8 flags; /* Some combination of SQLITE_FUNC_* */ 682 void *pUserData; /* User data parameter */ 683 FuncDef *pNext; /* Next function with same name */ 684 void (*xFunc)(sqlite3_context*,int,sqlite3_value**); /* Regular function */ 685 void (*xStep)(sqlite3_context*,int,sqlite3_value**); /* Aggregate step */ 686 void (*xFinalize)(sqlite3_context*); /* Aggregate finializer */ 687 char zName[1]; /* SQL name of the function. MUST BE LAST */ 688 }; 689 690 /* 691 ** Each SQLite module (virtual table definition) is defined by an 692 ** instance of the following structure, stored in the sqlite3.aModule 693 ** hash table. 694 */ 695 struct Module { 696 const sqlite3_module *pModule; /* Callback pointers */ 697 const char *zName; /* Name passed to create_module() */ 698 void *pAux; /* pAux passed to create_module() */ 699 void (*xDestroy)(void *); /* Module destructor function */ 700 }; 701 702 /* 703 ** Possible values for FuncDef.flags 704 */ 705 #define SQLITE_FUNC_LIKE 0x01 /* Candidate for the LIKE optimization */ 706 #define SQLITE_FUNC_CASE 0x02 /* Case-sensitive LIKE-type function */ 707 #define SQLITE_FUNC_EPHEM 0x04 /* Ephermeral. Delete with VDBE */ 708 709 /* 710 ** information about each column of an SQL table is held in an instance 711 ** of this structure. 712 */ 713 struct Column { 714 char *zName; /* Name of this column */ 715 Expr *pDflt; /* Default value of this column */ 716 char *zType; /* Data type for this column */ 717 char *zColl; /* Collating sequence. If NULL, use the default */ 718 u8 notNull; /* True if there is a NOT NULL constraint */ 719 u8 isPrimKey; /* True if this column is part of the PRIMARY KEY */ 720 char affinity; /* One of the SQLITE_AFF_... values */ 721 #ifndef SQLITE_OMIT_VIRTUALTABLE 722 u8 isHidden; /* True if this column is 'hidden' */ 723 #endif 724 }; 725 726 /* 727 ** A "Collating Sequence" is defined by an instance of the following 728 ** structure. Conceptually, a collating sequence consists of a name and 729 ** a comparison routine that defines the order of that sequence. 730 ** 731 ** There may two seperate implementations of the collation function, one 732 ** that processes text in UTF-8 encoding (CollSeq.xCmp) and another that 733 ** processes text encoded in UTF-16 (CollSeq.xCmp16), using the machine 734 ** native byte order. When a collation sequence is invoked, SQLite selects 735 ** the version that will require the least expensive encoding 736 ** translations, if any. 737 ** 738 ** The CollSeq.pUser member variable is an extra parameter that passed in 739 ** as the first argument to the UTF-8 comparison function, xCmp. 740 ** CollSeq.pUser16 is the equivalent for the UTF-16 comparison function, 741 ** xCmp16. 742 ** 743 ** If both CollSeq.xCmp and CollSeq.xCmp16 are NULL, it means that the 744 ** collating sequence is undefined. Indices built on an undefined 745 ** collating sequence may not be read or written. 746 */ 747 struct CollSeq { 748 char *zName; /* Name of the collating sequence, UTF-8 encoded */ 749 u8 enc; /* Text encoding handled by xCmp() */ 750 u8 type; /* One of the SQLITE_COLL_... values below */ 751 void *pUser; /* First argument to xCmp() */ 752 int (*xCmp)(void*,int, const void*, int, const void*); 753 void (*xDel)(void*); /* Destructor for pUser */ 754 }; 755 756 /* 757 ** Allowed values of CollSeq flags: 758 */ 759 #define SQLITE_COLL_BINARY 1 /* The default memcmp() collating sequence */ 760 #define SQLITE_COLL_NOCASE 2 /* The built-in NOCASE collating sequence */ 761 #define SQLITE_COLL_REVERSE 3 /* The built-in REVERSE collating sequence */ 762 #define SQLITE_COLL_USER 0 /* Any other user-defined collating sequence */ 763 764 /* 765 ** A sort order can be either ASC or DESC. 766 */ 767 #define SQLITE_SO_ASC 0 /* Sort in ascending order */ 768 #define SQLITE_SO_DESC 1 /* Sort in ascending order */ 769 770 /* 771 ** Column affinity types. 772 ** 773 ** These used to have mnemonic name like 'i' for SQLITE_AFF_INTEGER and 774 ** 't' for SQLITE_AFF_TEXT. But we can save a little space and improve 775 ** the speed a little by number the values consecutively. 776 ** 777 ** But rather than start with 0 or 1, we begin with 'a'. That way, 778 ** when multiple affinity types are concatenated into a string and 779 ** used as the P4 operand, they will be more readable. 780 ** 781 ** Note also that the numeric types are grouped together so that testing 782 ** for a numeric type is a single comparison. 783 */ 784 #define SQLITE_AFF_TEXT 'a' 785 #define SQLITE_AFF_NONE 'b' 786 #define SQLITE_AFF_NUMERIC 'c' 787 #define SQLITE_AFF_INTEGER 'd' 788 #define SQLITE_AFF_REAL 'e' 789 790 #define sqlite3IsNumericAffinity(X) ((X)>=SQLITE_AFF_NUMERIC) 791 792 /* 793 ** The SQLITE_AFF_MASK values masks off the significant bits of an 794 ** affinity value. 795 */ 796 #define SQLITE_AFF_MASK 0x67 797 798 /* 799 ** Additional bit values that can be ORed with an affinity without 800 ** changing the affinity. 801 */ 802 #define SQLITE_JUMPIFNULL 0x08 /* jumps if either operand is NULL */ 803 #define SQLITE_NULLEQUAL 0x10 /* compare NULLs equal */ 804 #define SQLITE_STOREP2 0x80 /* Store result in reg[P2] rather than jump */ 805 806 /* 807 ** Each SQL table is represented in memory by an instance of the 808 ** following structure. 809 ** 810 ** Table.zName is the name of the table. The case of the original 811 ** CREATE TABLE statement is stored, but case is not significant for 812 ** comparisons. 813 ** 814 ** Table.nCol is the number of columns in this table. Table.aCol is a 815 ** pointer to an array of Column structures, one for each column. 816 ** 817 ** If the table has an INTEGER PRIMARY KEY, then Table.iPKey is the index of 818 ** the column that is that key. Otherwise Table.iPKey is negative. Note 819 ** that the datatype of the PRIMARY KEY must be INTEGER for this field to 820 ** be set. An INTEGER PRIMARY KEY is used as the rowid for each row of 821 ** the table. If a table has no INTEGER PRIMARY KEY, then a random rowid 822 ** is generated for each row of the table. Table.hasPrimKey is true if 823 ** the table has any PRIMARY KEY, INTEGER or otherwise. 824 ** 825 ** Table.tnum is the page number for the root BTree page of the table in the 826 ** database file. If Table.iDb is the index of the database table backend 827 ** in sqlite.aDb[]. 0 is for the main database and 1 is for the file that 828 ** holds temporary tables and indices. If Table.isEphem 829 ** is true, then the table is stored in a file that is automatically deleted 830 ** when the VDBE cursor to the table is closed. In this case Table.tnum 831 ** refers VDBE cursor number that holds the table open, not to the root 832 ** page number. Transient tables are used to hold the results of a 833 ** sub-query that appears instead of a real table name in the FROM clause 834 ** of a SELECT statement. 835 */ 836 struct Table { 837 char *zName; /* Name of the table */ 838 int nCol; /* Number of columns in this table */ 839 Column *aCol; /* Information about each column */ 840 int iPKey; /* If not less then 0, use aCol[iPKey] as the primary key */ 841 Index *pIndex; /* List of SQL indexes on this table. */ 842 int tnum; /* Root BTree node for this table (see note above) */ 843 Select *pSelect; /* NULL for tables. Points to definition if a view. */ 844 int nRef; /* Number of pointers to this Table */ 845 Trigger *pTrigger; /* List of SQL triggers on this table */ 846 FKey *pFKey; /* Linked list of all foreign keys in this table */ 847 char *zColAff; /* String defining the affinity of each column */ 848 #ifndef SQLITE_OMIT_CHECK 849 Expr *pCheck; /* The AND of all CHECK constraints */ 850 #endif 851 #ifndef SQLITE_OMIT_ALTERTABLE 852 int addColOffset; /* Offset in CREATE TABLE statement to add a new column */ 853 #endif 854 u8 readOnly; /* True if this table should not be written by the user */ 855 u8 isEphem; /* True if created using OP_OpenEphermeral */ 856 u8 hasPrimKey; /* True if there exists a primary key */ 857 u8 keyConf; /* What to do in case of uniqueness conflict on iPKey */ 858 u8 autoInc; /* True if the integer primary key is autoincrement */ 859 #ifndef SQLITE_OMIT_VIRTUALTABLE 860 u8 isVirtual; /* True if this is a virtual table */ 861 u8 isCommit; /* True once the CREATE TABLE has been committed */ 862 Module *pMod; /* Pointer to the implementation of the module */ 863 sqlite3_vtab *pVtab; /* Pointer to the module instance */ 864 int nModuleArg; /* Number of arguments to the module */ 865 char **azModuleArg; /* Text of all module args. [0] is module name */ 866 #endif 867 Schema *pSchema; /* Schema that contains this table */ 868 }; 869 870 /* 871 ** Test to see whether or not a table is a virtual table. This is 872 ** done as a macro so that it will be optimized out when virtual 873 ** table support is omitted from the build. 874 */ 875 #ifndef SQLITE_OMIT_VIRTUALTABLE 876 # define IsVirtual(X) ((X)->isVirtual) 877 # define IsHiddenColumn(X) ((X)->isHidden) 878 #else 879 # define IsVirtual(X) 0 880 # define IsHiddenColumn(X) 0 881 #endif 882 883 /* 884 ** Each foreign key constraint is an instance of the following structure. 885 ** 886 ** A foreign key is associated with two tables. The "from" table is 887 ** the table that contains the REFERENCES clause that creates the foreign 888 ** key. The "to" table is the table that is named in the REFERENCES clause. 889 ** Consider this example: 890 ** 891 ** CREATE TABLE ex1( 892 ** a INTEGER PRIMARY KEY, 893 ** b INTEGER CONSTRAINT fk1 REFERENCES ex2(x) 894 ** ); 895 ** 896 ** For foreign key "fk1", the from-table is "ex1" and the to-table is "ex2". 897 ** 898 ** Each REFERENCES clause generates an instance of the following structure 899 ** which is attached to the from-table. The to-table need not exist when 900 ** the from-table is created. The existance of the to-table is not checked 901 ** until an attempt is made to insert data into the from-table. 902 ** 903 ** The sqlite.aFKey hash table stores pointers to this structure 904 ** given the name of a to-table. For each to-table, all foreign keys 905 ** associated with that table are on a linked list using the FKey.pNextTo 906 ** field. 907 */ 908 struct FKey { 909 Table *pFrom; /* The table that constains the REFERENCES clause */ 910 FKey *pNextFrom; /* Next foreign key in pFrom */ 911 char *zTo; /* Name of table that the key points to */ 912 FKey *pNextTo; /* Next foreign key that points to zTo */ 913 int nCol; /* Number of columns in this key */ 914 struct sColMap { /* Mapping of columns in pFrom to columns in zTo */ 915 int iFrom; /* Index of column in pFrom */ 916 char *zCol; /* Name of column in zTo. If 0 use PRIMARY KEY */ 917 } *aCol; /* One entry for each of nCol column s */ 918 u8 isDeferred; /* True if constraint checking is deferred till COMMIT */ 919 u8 updateConf; /* How to resolve conflicts that occur on UPDATE */ 920 u8 deleteConf; /* How to resolve conflicts that occur on DELETE */ 921 u8 insertConf; /* How to resolve conflicts that occur on INSERT */ 922 }; 923 924 /* 925 ** SQLite supports many different ways to resolve a constraint 926 ** error. ROLLBACK processing means that a constraint violation 927 ** causes the operation in process to fail and for the current transaction 928 ** to be rolled back. ABORT processing means the operation in process 929 ** fails and any prior changes from that one operation are backed out, 930 ** but the transaction is not rolled back. FAIL processing means that 931 ** the operation in progress stops and returns an error code. But prior 932 ** changes due to the same operation are not backed out and no rollback 933 ** occurs. IGNORE means that the particular row that caused the constraint 934 ** error is not inserted or updated. Processing continues and no error 935 ** is returned. REPLACE means that preexisting database rows that caused 936 ** a UNIQUE constraint violation are removed so that the new insert or 937 ** update can proceed. Processing continues and no error is reported. 938 ** 939 ** RESTRICT, SETNULL, and CASCADE actions apply only to foreign keys. 940 ** RESTRICT is the same as ABORT for IMMEDIATE foreign keys and the 941 ** same as ROLLBACK for DEFERRED keys. SETNULL means that the foreign 942 ** key is set to NULL. CASCADE means that a DELETE or UPDATE of the 943 ** referenced table row is propagated into the row that holds the 944 ** foreign key. 945 ** 946 ** The following symbolic values are used to record which type 947 ** of action to take. 948 */ 949 #define OE_None 0 /* There is no constraint to check */ 950 #define OE_Rollback 1 /* Fail the operation and rollback the transaction */ 951 #define OE_Abort 2 /* Back out changes but do no rollback transaction */ 952 #define OE_Fail 3 /* Stop the operation but leave all prior changes */ 953 #define OE_Ignore 4 /* Ignore the error. Do not do the INSERT or UPDATE */ 954 #define OE_Replace 5 /* Delete existing record, then do INSERT or UPDATE */ 955 956 #define OE_Restrict 6 /* OE_Abort for IMMEDIATE, OE_Rollback for DEFERRED */ 957 #define OE_SetNull 7 /* Set the foreign key value to NULL */ 958 #define OE_SetDflt 8 /* Set the foreign key value to its default */ 959 #define OE_Cascade 9 /* Cascade the changes */ 960 961 #define OE_Default 99 /* Do whatever the default action is */ 962 963 964 /* 965 ** An instance of the following structure is passed as the first 966 ** argument to sqlite3VdbeKeyCompare and is used to control the 967 ** comparison of the two index keys. 968 ** 969 ** If the KeyInfo.incrKey value is true and the comparison would 970 ** otherwise be equal, then return a result as if the second key 971 ** were larger. 972 */ 973 struct KeyInfo { 974 sqlite3 *db; /* The database connection */ 975 u8 enc; /* Text encoding - one of the TEXT_Utf* values */ 976 u8 incrKey; /* Increase 2nd key by epsilon before comparison */ 977 u8 prefixIsEqual; /* Treat a prefix as equal */ 978 int nField; /* Number of entries in aColl[] */ 979 u8 *aSortOrder; /* If defined an aSortOrder[i] is true, sort DESC */ 980 CollSeq *aColl[1]; /* Collating sequence for each term of the key */ 981 }; 982 983 /* 984 ** Each SQL index is represented in memory by an 985 ** instance of the following structure. 986 ** 987 ** The columns of the table that are to be indexed are described 988 ** by the aiColumn[] field of this structure. For example, suppose 989 ** we have the following table and index: 990 ** 991 ** CREATE TABLE Ex1(c1 int, c2 int, c3 text); 992 ** CREATE INDEX Ex2 ON Ex1(c3,c1); 993 ** 994 ** In the Table structure describing Ex1, nCol==3 because there are 995 ** three columns in the table. In the Index structure describing 996 ** Ex2, nColumn==2 since 2 of the 3 columns of Ex1 are indexed. 997 ** The value of aiColumn is {2, 0}. aiColumn[0]==2 because the 998 ** first column to be indexed (c3) has an index of 2 in Ex1.aCol[]. 999 ** The second column to be indexed (c1) has an index of 0 in 1000 ** Ex1.aCol[], hence Ex2.aiColumn[1]==0. 1001 ** 1002 ** The Index.onError field determines whether or not the indexed columns 1003 ** must be unique and what to do if they are not. When Index.onError=OE_None, 1004 ** it means this is not a unique index. Otherwise it is a unique index 1005 ** and the value of Index.onError indicate the which conflict resolution 1006 ** algorithm to employ whenever an attempt is made to insert a non-unique 1007 ** element. 1008 */ 1009 struct Index { 1010 char *zName; /* Name of this index */ 1011 int nColumn; /* Number of columns in the table used by this index */ 1012 int *aiColumn; /* Which columns are used by this index. 1st is 0 */ 1013 unsigned *aiRowEst; /* Result of ANALYZE: Est. rows selected by each column */ 1014 Table *pTable; /* The SQL table being indexed */ 1015 int tnum; /* Page containing root of this index in database file */ 1016 u8 onError; /* OE_Abort, OE_Ignore, OE_Replace, or OE_None */ 1017 u8 autoIndex; /* True if is automatically created (ex: by UNIQUE) */ 1018 char *zColAff; /* String defining the affinity of each column */ 1019 Index *pNext; /* The next index associated with the same table */ 1020 Schema *pSchema; /* Schema containing this index */ 1021 u8 *aSortOrder; /* Array of size Index.nColumn. True==DESC, False==ASC */ 1022 char **azColl; /* Array of collation sequence names for index */ 1023 }; 1024 1025 /* 1026 ** Each token coming out of the lexer is an instance of 1027 ** this structure. Tokens are also used as part of an expression. 1028 ** 1029 ** Note if Token.z==0 then Token.dyn and Token.n are undefined and 1030 ** may contain random values. Do not make any assuptions about Token.dyn 1031 ** and Token.n when Token.z==0. 1032 */ 1033 struct Token { 1034 const unsigned char *z; /* Text of the token. Not NULL-terminated! */ 1035 unsigned dyn : 1; /* True for malloced memory, false for static */ 1036 unsigned n : 31; /* Number of characters in this token */ 1037 }; 1038 1039 /* 1040 ** An instance of this structure contains information needed to generate 1041 ** code for a SELECT that contains aggregate functions. 1042 ** 1043 ** If Expr.op==TK_AGG_COLUMN or TK_AGG_FUNCTION then Expr.pAggInfo is a 1044 ** pointer to this structure. The Expr.iColumn field is the index in 1045 ** AggInfo.aCol[] or AggInfo.aFunc[] of information needed to generate 1046 ** code for that node. 1047 ** 1048 ** AggInfo.pGroupBy and AggInfo.aFunc.pExpr point to fields within the 1049 ** original Select structure that describes the SELECT statement. These 1050 ** fields do not need to be freed when deallocating the AggInfo structure. 1051 */ 1052 struct AggInfo { 1053 u8 directMode; /* Direct rendering mode means take data directly 1054 ** from source tables rather than from accumulators */ 1055 u8 useSortingIdx; /* In direct mode, reference the sorting index rather 1056 ** than the source table */ 1057 int sortingIdx; /* Cursor number of the sorting index */ 1058 ExprList *pGroupBy; /* The group by clause */ 1059 int nSortingColumn; /* Number of columns in the sorting index */ 1060 struct AggInfo_col { /* For each column used in source tables */ 1061 Table *pTab; /* Source table */ 1062 int iTable; /* Cursor number of the source table */ 1063 int iColumn; /* Column number within the source table */ 1064 int iSorterColumn; /* Column number in the sorting index */ 1065 int iMem; /* Memory location that acts as accumulator */ 1066 Expr *pExpr; /* The original expression */ 1067 } *aCol; 1068 int nColumn; /* Number of used entries in aCol[] */ 1069 int nColumnAlloc; /* Number of slots allocated for aCol[] */ 1070 int nAccumulator; /* Number of columns that show through to the output. 1071 ** Additional columns are used only as parameters to 1072 ** aggregate functions */ 1073 struct AggInfo_func { /* For each aggregate function */ 1074 Expr *pExpr; /* Expression encoding the function */ 1075 FuncDef *pFunc; /* The aggregate function implementation */ 1076 int iMem; /* Memory location that acts as accumulator */ 1077 int iDistinct; /* Ephermeral table used to enforce DISTINCT */ 1078 } *aFunc; 1079 int nFunc; /* Number of entries in aFunc[] */ 1080 int nFuncAlloc; /* Number of slots allocated for aFunc[] */ 1081 }; 1082 1083 /* 1084 ** Each node of an expression in the parse tree is an instance 1085 ** of this structure. 1086 ** 1087 ** Expr.op is the opcode. The integer parser token codes are reused 1088 ** as opcodes here. For example, the parser defines TK_GE to be an integer 1089 ** code representing the ">=" operator. This same integer code is reused 1090 ** to represent the greater-than-or-equal-to operator in the expression 1091 ** tree. 1092 ** 1093 ** Expr.pRight and Expr.pLeft are subexpressions. Expr.pList is a list 1094 ** of argument if the expression is a function. 1095 ** 1096 ** Expr.token is the operator token for this node. For some expressions 1097 ** that have subexpressions, Expr.token can be the complete text that gave 1098 ** rise to the Expr. In the latter case, the token is marked as being 1099 ** a compound token. 1100 ** 1101 ** An expression of the form ID or ID.ID refers to a column in a table. 1102 ** For such expressions, Expr.op is set to TK_COLUMN and Expr.iTable is 1103 ** the integer cursor number of a VDBE cursor pointing to that table and 1104 ** Expr.iColumn is the column number for the specific column. If the 1105 ** expression is used as a result in an aggregate SELECT, then the 1106 ** value is also stored in the Expr.iAgg column in the aggregate so that 1107 ** it can be accessed after all aggregates are computed. 1108 ** 1109 ** If the expression is a function, the Expr.iTable is an integer code 1110 ** representing which function. If the expression is an unbound variable 1111 ** marker (a question mark character '?' in the original SQL) then the 1112 ** Expr.iTable holds the index number for that variable. 1113 ** 1114 ** If the expression is a subquery then Expr.iColumn holds an integer 1115 ** register number containing the result of the subquery. If the 1116 ** subquery gives a constant result, then iTable is -1. If the subquery 1117 ** gives a different answer at different times during statement processing 1118 ** then iTable is the address of a subroutine that computes the subquery. 1119 ** 1120 ** The Expr.pSelect field points to a SELECT statement. The SELECT might 1121 ** be the right operand of an IN operator. Or, if a scalar SELECT appears 1122 ** in an expression the opcode is TK_SELECT and Expr.pSelect is the only 1123 ** operand. 1124 ** 1125 ** If the Expr is of type OP_Column, and the table it is selecting from 1126 ** is a disk table or the "old.*" pseudo-table, then pTab points to the 1127 ** corresponding table definition. 1128 */ 1129 struct Expr { 1130 u8 op; /* Operation performed by this node */ 1131 char affinity; /* The affinity of the column or 0 if not a column */ 1132 u16 flags; /* Various flags. See below */ 1133 CollSeq *pColl; /* The collation type of the column or 0 */ 1134 Expr *pLeft, *pRight; /* Left and right subnodes */ 1135 ExprList *pList; /* A list of expressions used as function arguments 1136 ** or in "<expr> IN (<expr-list)" */ 1137 Token token; /* An operand token */ 1138 Token span; /* Complete text of the expression */ 1139 int iTable, iColumn; /* When op==TK_COLUMN, then this expr node means the 1140 ** iColumn-th field of the iTable-th table. */ 1141 AggInfo *pAggInfo; /* Used by TK_AGG_COLUMN and TK_AGG_FUNCTION */ 1142 int iAgg; /* Which entry in pAggInfo->aCol[] or ->aFunc[] */ 1143 int iRightJoinTable; /* If EP_FromJoin, the right table of the join */ 1144 Select *pSelect; /* When the expression is a sub-select. Also the 1145 ** right side of "<expr> IN (<select>)" */ 1146 Table *pTab; /* Table for OP_Column expressions. */ 1147 /* Schema *pSchema; */ 1148 #if defined(SQLITE_TEST) || SQLITE_MAX_EXPR_DEPTH>0 1149 int nHeight; /* Height of the tree headed by this node */ 1150 #endif 1151 }; 1152 1153 /* 1154 ** The following are the meanings of bits in the Expr.flags field. 1155 */ 1156 #define EP_FromJoin 0x0001 /* Originated in ON or USING clause of a join */ 1157 #define EP_Agg 0x0002 /* Contains one or more aggregate functions */ 1158 #define EP_Resolved 0x0004 /* IDs have been resolved to COLUMNs */ 1159 #define EP_Error 0x0008 /* Expression contains one or more errors */ 1160 #define EP_Distinct 0x0010 /* Aggregate function with DISTINCT keyword */ 1161 #define EP_VarSelect 0x0020 /* pSelect is correlated, not constant */ 1162 #define EP_Dequoted 0x0040 /* True if the string has been dequoted */ 1163 #define EP_InfixFunc 0x0080 /* True for an infix function: LIKE, GLOB, etc */ 1164 #define EP_ExpCollate 0x0100 /* Collating sequence specified explicitly */ 1165 #define EP_AnyAff 0x0200 /* Can take a cached column of any affinity */ 1166 #define EP_FixedDest 0x0400 /* Result needed in a specific register */ 1167 1168 /* 1169 ** These macros can be used to test, set, or clear bits in the 1170 ** Expr.flags field. 1171 */ 1172 #define ExprHasProperty(E,P) (((E)->flags&(P))==(P)) 1173 #define ExprHasAnyProperty(E,P) (((E)->flags&(P))!=0) 1174 #define ExprSetProperty(E,P) (E)->flags|=(P) 1175 #define ExprClearProperty(E,P) (E)->flags&=~(P) 1176 1177 /* 1178 ** A list of expressions. Each expression may optionally have a 1179 ** name. An expr/name combination can be used in several ways, such 1180 ** as the list of "expr AS ID" fields following a "SELECT" or in the 1181 ** list of "ID = expr" items in an UPDATE. A list of expressions can 1182 ** also be used as the argument to a function, in which case the a.zName 1183 ** field is not used. 1184 */ 1185 struct ExprList { 1186 int nExpr; /* Number of expressions on the list */ 1187 int nAlloc; /* Number of entries allocated below */ 1188 int iECursor; /* VDBE Cursor associated with this ExprList */ 1189 struct ExprList_item { 1190 Expr *pExpr; /* The list of expressions */ 1191 char *zName; /* Token associated with this expression */ 1192 u8 sortOrder; /* 1 for DESC or 0 for ASC */ 1193 u8 isAgg; /* True if this is an aggregate like count(*) */ 1194 u8 done; /* A flag to indicate when processing is finished */ 1195 } *a; /* One entry for each expression */ 1196 }; 1197 1198 /* 1199 ** An instance of this structure can hold a simple list of identifiers, 1200 ** such as the list "a,b,c" in the following statements: 1201 ** 1202 ** INSERT INTO t(a,b,c) VALUES ...; 1203 ** CREATE INDEX idx ON t(a,b,c); 1204 ** CREATE TRIGGER trig BEFORE UPDATE ON t(a,b,c) ...; 1205 ** 1206 ** The IdList.a.idx field is used when the IdList represents the list of 1207 ** column names after a table name in an INSERT statement. In the statement 1208 ** 1209 ** INSERT INTO t(a,b,c) ... 1210 ** 1211 ** If "a" is the k-th column of table "t", then IdList.a[0].idx==k. 1212 */ 1213 struct IdList { 1214 struct IdList_item { 1215 char *zName; /* Name of the identifier */ 1216 int idx; /* Index in some Table.aCol[] of a column named zName */ 1217 } *a; 1218 int nId; /* Number of identifiers on the list */ 1219 int nAlloc; /* Number of entries allocated for a[] below */ 1220 }; 1221 1222 /* 1223 ** The bitmask datatype defined below is used for various optimizations. 1224 ** 1225 ** Changing this from a 64-bit to a 32-bit type limits the number of 1226 ** tables in a join to 32 instead of 64. But it also reduces the size 1227 ** of the library by 738 bytes on ix86. 1228 */ 1229 typedef u64 Bitmask; 1230 1231 /* 1232 ** The following structure describes the FROM clause of a SELECT statement. 1233 ** Each table or subquery in the FROM clause is a separate element of 1234 ** the SrcList.a[] array. 1235 ** 1236 ** With the addition of multiple database support, the following structure 1237 ** can also be used to describe a particular table such as the table that 1238 ** is modified by an INSERT, DELETE, or UPDATE statement. In standard SQL, 1239 ** such a table must be a simple name: ID. But in SQLite, the table can 1240 ** now be identified by a database name, a dot, then the table name: ID.ID. 1241 ** 1242 ** The jointype starts out showing the join type between the current table 1243 ** and the next table on the list. The parser builds the list this way. 1244 ** But sqlite3SrcListShiftJoinType() later shifts the jointypes so that each 1245 ** jointype expresses the join between the table and the previous table. 1246 */ 1247 struct SrcList { 1248 i16 nSrc; /* Number of tables or subqueries in the FROM clause */ 1249 i16 nAlloc; /* Number of entries allocated in a[] below */ 1250 struct SrcList_item { 1251 char *zDatabase; /* Name of database holding this table */ 1252 char *zName; /* Name of the table */ 1253 char *zAlias; /* The "B" part of a "A AS B" phrase. zName is the "A" */ 1254 Table *pTab; /* An SQL table corresponding to zName */ 1255 Select *pSelect; /* A SELECT statement used in place of a table name */ 1256 u8 isPopulated; /* Temporary table associated with SELECT is populated */ 1257 u8 jointype; /* Type of join between this able and the previous */ 1258 int iCursor; /* The VDBE cursor number used to access this table */ 1259 Expr *pOn; /* The ON clause of a join */ 1260 IdList *pUsing; /* The USING clause of a join */ 1261 Bitmask colUsed; /* Bit N (1<<N) set if column N or pTab is used */ 1262 } a[1]; /* One entry for each identifier on the list */ 1263 }; 1264 1265 /* 1266 ** Permitted values of the SrcList.a.jointype field 1267 */ 1268 #define JT_INNER 0x0001 /* Any kind of inner or cross join */ 1269 #define JT_CROSS 0x0002 /* Explicit use of the CROSS keyword */ 1270 #define JT_NATURAL 0x0004 /* True for a "natural" join */ 1271 #define JT_LEFT 0x0008 /* Left outer join */ 1272 #define JT_RIGHT 0x0010 /* Right outer join */ 1273 #define JT_OUTER 0x0020 /* The "OUTER" keyword is present */ 1274 #define JT_ERROR 0x0040 /* unknown or unsupported join type */ 1275 1276 /* 1277 ** For each nested loop in a WHERE clause implementation, the WhereInfo 1278 ** structure contains a single instance of this structure. This structure 1279 ** is intended to be private the the where.c module and should not be 1280 ** access or modified by other modules. 1281 ** 1282 ** The pIdxInfo and pBestIdx fields are used to help pick the best 1283 ** index on a virtual table. The pIdxInfo pointer contains indexing 1284 ** information for the i-th table in the FROM clause before reordering. 1285 ** All the pIdxInfo pointers are freed by whereInfoFree() in where.c. 1286 ** The pBestIdx pointer is a copy of pIdxInfo for the i-th table after 1287 ** FROM clause ordering. This is a little confusing so I will repeat 1288 ** it in different words. WhereInfo.a[i].pIdxInfo is index information 1289 ** for WhereInfo.pTabList.a[i]. WhereInfo.a[i].pBestInfo is the 1290 ** index information for the i-th loop of the join. pBestInfo is always 1291 ** either NULL or a copy of some pIdxInfo. So for cleanup it is 1292 ** sufficient to free all of the pIdxInfo pointers. 1293 ** 1294 */ 1295 struct WhereLevel { 1296 int iFrom; /* Which entry in the FROM clause */ 1297 int flags; /* Flags associated with this level */ 1298 int iMem; /* First memory cell used by this level */ 1299 int iLeftJoin; /* Memory cell used to implement LEFT OUTER JOIN */ 1300 Index *pIdx; /* Index used. NULL if no index */ 1301 int iTabCur; /* The VDBE cursor used to access the table */ 1302 int iIdxCur; /* The VDBE cursor used to acesss pIdx */ 1303 int brk; /* Jump here to break out of the loop */ 1304 int nxt; /* Jump here to start the next IN combination */ 1305 int cont; /* Jump here to continue with the next loop cycle */ 1306 int top; /* First instruction of interior of the loop */ 1307 int op, p1, p2; /* Opcode used to terminate the loop */ 1308 int nEq; /* Number of == or IN constraints on this loop */ 1309 int nIn; /* Number of IN operators constraining this loop */ 1310 struct InLoop { 1311 int iCur; /* The VDBE cursor used by this IN operator */ 1312 int topAddr; /* Top of the IN loop */ 1313 } *aInLoop; /* Information about each nested IN operator */ 1314 sqlite3_index_info *pBestIdx; /* Index information for this level */ 1315 1316 /* The following field is really not part of the current level. But 1317 ** we need a place to cache index information for each table in the 1318 ** FROM clause and the WhereLevel structure is a convenient place. 1319 */ 1320 sqlite3_index_info *pIdxInfo; /* Index info for n-th source table */ 1321 }; 1322 1323 /* 1324 ** Flags appropriate for the wflags parameter of sqlite3WhereBegin(). 1325 */ 1326 #define WHERE_ORDERBY_NORMAL 0 /* No-op */ 1327 #define WHERE_ORDERBY_MIN 1 /* ORDER BY processing for min() func */ 1328 #define WHERE_ORDERBY_MAX 2 /* ORDER BY processing for max() func */ 1329 #define WHERE_ONEPASS_DESIRED 4 /* Want to do one-pass UPDATE/DELETE */ 1330 1331 /* 1332 ** The WHERE clause processing routine has two halves. The 1333 ** first part does the start of the WHERE loop and the second 1334 ** half does the tail of the WHERE loop. An instance of 1335 ** this structure is returned by the first half and passed 1336 ** into the second half to give some continuity. 1337 */ 1338 struct WhereInfo { 1339 Parse *pParse; /* Parsing and code generating context */ 1340 u8 okOnePass; /* Ok to use one-pass algorithm for UPDATE or DELETE */ 1341 SrcList *pTabList; /* List of tables in the join */ 1342 int iTop; /* The very beginning of the WHERE loop */ 1343 int iContinue; /* Jump here to continue with next record */ 1344 int iBreak; /* Jump here to break out of the loop */ 1345 int nLevel; /* Number of nested loop */ 1346 sqlite3_index_info **apInfo; /* Array of pointers to index info structures */ 1347 WhereLevel a[1]; /* Information about each nest loop in the WHERE */ 1348 }; 1349 1350 /* 1351 ** A NameContext defines a context in which to resolve table and column 1352 ** names. The context consists of a list of tables (the pSrcList) field and 1353 ** a list of named expression (pEList). The named expression list may 1354 ** be NULL. The pSrc corresponds to the FROM clause of a SELECT or 1355 ** to the table being operated on by INSERT, UPDATE, or DELETE. The 1356 ** pEList corresponds to the result set of a SELECT and is NULL for 1357 ** other statements. 1358 ** 1359 ** NameContexts can be nested. When resolving names, the inner-most 1360 ** context is searched first. If no match is found, the next outer 1361 ** context is checked. If there is still no match, the next context 1362 ** is checked. This process continues until either a match is found 1363 ** or all contexts are check. When a match is found, the nRef member of 1364 ** the context containing the match is incremented. 1365 ** 1366 ** Each subquery gets a new NameContext. The pNext field points to the 1367 ** NameContext in the parent query. Thus the process of scanning the 1368 ** NameContext list corresponds to searching through successively outer 1369 ** subqueries looking for a match. 1370 */ 1371 struct NameContext { 1372 Parse *pParse; /* The parser */ 1373 SrcList *pSrcList; /* One or more tables used to resolve names */ 1374 ExprList *pEList; /* Optional list of named expressions */ 1375 int nRef; /* Number of names resolved by this context */ 1376 int nErr; /* Number of errors encountered while resolving names */ 1377 u8 allowAgg; /* Aggregate functions allowed here */ 1378 u8 hasAgg; /* True if aggregates are seen */ 1379 u8 isCheck; /* True if resolving names in a CHECK constraint */ 1380 int nDepth; /* Depth of subquery recursion. 1 for no recursion */ 1381 AggInfo *pAggInfo; /* Information about aggregates at this level */ 1382 NameContext *pNext; /* Next outer name context. NULL for outermost */ 1383 }; 1384 1385 /* 1386 ** An instance of the following structure contains all information 1387 ** needed to generate code for a single SELECT statement. 1388 ** 1389 ** nLimit is set to -1 if there is no LIMIT clause. nOffset is set to 0. 1390 ** If there is a LIMIT clause, the parser sets nLimit to the value of the 1391 ** limit and nOffset to the value of the offset (or 0 if there is not 1392 ** offset). But later on, nLimit and nOffset become the memory locations 1393 ** in the VDBE that record the limit and offset counters. 1394 ** 1395 ** addrOpenEphm[] entries contain the address of OP_OpenEphemeral opcodes. 1396 ** These addresses must be stored so that we can go back and fill in 1397 ** the P4_KEYINFO and P2 parameters later. Neither the KeyInfo nor 1398 ** the number of columns in P2 can be computed at the same time 1399 ** as the OP_OpenEphm instruction is coded because not 1400 ** enough information about the compound query is known at that point. 1401 ** The KeyInfo for addrOpenTran[0] and [1] contains collating sequences 1402 ** for the result set. The KeyInfo for addrOpenTran[2] contains collating 1403 ** sequences for the ORDER BY clause. 1404 */ 1405 struct Select { 1406 ExprList *pEList; /* The fields of the result */ 1407 u8 op; /* One of: TK_UNION TK_ALL TK_INTERSECT TK_EXCEPT */ 1408 u8 isDistinct; /* True if the DISTINCT keyword is present */ 1409 u8 isResolved; /* True once sqlite3SelectResolve() has run. */ 1410 u8 isAgg; /* True if this is an aggregate query */ 1411 u8 usesEphm; /* True if uses an OpenEphemeral opcode */ 1412 u8 disallowOrderBy; /* Do not allow an ORDER BY to be attached if TRUE */ 1413 char affinity; /* MakeRecord with this affinity for SRT_Set */ 1414 SrcList *pSrc; /* The FROM clause */ 1415 Expr *pWhere; /* The WHERE clause */ 1416 ExprList *pGroupBy; /* The GROUP BY clause */ 1417 Expr *pHaving; /* The HAVING clause */ 1418 ExprList *pOrderBy; /* The ORDER BY clause */ 1419 Select *pPrior; /* Prior select in a compound select statement */ 1420 Select *pNext; /* Next select to the left in a compound */ 1421 Select *pRightmost; /* Right-most select in a compound select statement */ 1422 Expr *pLimit; /* LIMIT expression. NULL means not used. */ 1423 Expr *pOffset; /* OFFSET expression. NULL means not used. */ 1424 int iLimit, iOffset; /* Memory registers holding LIMIT & OFFSET counters */ 1425 int addrOpenEphm[3]; /* OP_OpenEphem opcodes related to this select */ 1426 }; 1427 1428 /* 1429 ** The results of a select can be distributed in several ways. 1430 */ 1431 #define SRT_Union 1 /* Store result as keys in an index */ 1432 #define SRT_Except 2 /* Remove result from a UNION index */ 1433 #define SRT_Exists 3 /* Store 1 if the result is not empty */ 1434 #define SRT_Discard 4 /* Do not save the results anywhere */ 1435 1436 /* The ORDER BY clause is ignored for all of the above */ 1437 #define IgnorableOrderby(X) ((X->eDest)<=SRT_Discard) 1438 1439 #define SRT_Callback 5 /* Invoke a callback with each row of result */ 1440 #define SRT_Mem 6 /* Store result in a memory cell */ 1441 #define SRT_Set 7 /* Store non-null results as keys in an index */ 1442 #define SRT_Table 8 /* Store result as data with an automatic rowid */ 1443 #define SRT_EphemTab 9 /* Create transient tab and store like SRT_Table */ 1444 #define SRT_Subroutine 10 /* Call a subroutine to handle results */ 1445 1446 /* 1447 ** A structure used to customize the behaviour of sqlite3Select(). See 1448 ** comments above sqlite3Select() for details. 1449 */ 1450 typedef struct SelectDest SelectDest; 1451 struct SelectDest { 1452 u8 eDest; /* How to dispose of the results */ 1453 u8 affinity; /* Affinity used when eDest==SRT_Set */ 1454 int iParm; /* A parameter used by the eDest disposal method */ 1455 int iMem; /* Base register where results are written */ 1456 int nMem; /* Number of registers allocated */ 1457 }; 1458 1459 /* 1460 ** An SQL parser context. A copy of this structure is passed through 1461 ** the parser and down into all the parser action routine in order to 1462 ** carry around information that is global to the entire parse. 1463 ** 1464 ** The structure is divided into two parts. When the parser and code 1465 ** generate call themselves recursively, the first part of the structure 1466 ** is constant but the second part is reset at the beginning and end of 1467 ** each recursion. 1468 ** 1469 ** The nTableLock and aTableLock variables are only used if the shared-cache 1470 ** feature is enabled (if sqlite3Tsd()->useSharedData is true). They are 1471 ** used to store the set of table-locks required by the statement being 1472 ** compiled. Function sqlite3TableLock() is used to add entries to the 1473 ** list. 1474 */ 1475 struct Parse { 1476 sqlite3 *db; /* The main database structure */ 1477 int rc; /* Return code from execution */ 1478 char *zErrMsg; /* An error message */ 1479 Vdbe *pVdbe; /* An engine for executing database bytecode */ 1480 u8 colNamesSet; /* TRUE after OP_ColumnName has been issued to pVdbe */ 1481 u8 nameClash; /* A permanent table name clashes with temp table name */ 1482 u8 checkSchema; /* Causes schema cookie check after an error */ 1483 u8 nested; /* Number of nested calls to the parser/code generator */ 1484 u8 parseError; /* True after a parsing error. Ticket #1794 */ 1485 u8 nTempReg; /* Number of temporary registers in aTempReg[] */ 1486 u8 nTempInUse; /* Number of aTempReg[] currently checked out */ 1487 int aTempReg[8]; /* Holding area for temporary registers */ 1488 int nRangeReg; /* Size of the temporary register block */ 1489 int iRangeReg; /* First register in temporary register block */ 1490 int nErr; /* Number of errors seen */ 1491 int nTab; /* Number of previously allocated VDBE cursors */ 1492 int nMem; /* Number of memory cells used so far */ 1493 int nSet; /* Number of sets used so far */ 1494 int ckBase; /* Base register of data during check constraints */ 1495 int disableColCache; /* True to disable adding to column cache */ 1496 int nColCache; /* Number of entries in the column cache */ 1497 int iColCache; /* Next entry of the cache to replace */ 1498 struct yColCache { 1499 int iTable; /* Table cursor number */ 1500 int iColumn; /* Table column number */ 1501 char affChange; /* True if this register has had an affinity change */ 1502 int iReg; /* Register holding value of this column */ 1503 } aColCache[10]; /* One for each valid column cache entry */ 1504 u32 writeMask; /* Start a write transaction on these databases */ 1505 u32 cookieMask; /* Bitmask of schema verified databases */ 1506 int cookieGoto; /* Address of OP_Goto to cookie verifier subroutine */ 1507 int cookieValue[SQLITE_MAX_ATTACHED+2]; /* Values of cookies to verify */ 1508 #ifndef SQLITE_OMIT_SHARED_CACHE 1509 int nTableLock; /* Number of locks in aTableLock */ 1510 TableLock *aTableLock; /* Required table locks for shared-cache mode */ 1511 #endif 1512 int regRowid; /* Register holding rowid of CREATE TABLE entry */ 1513 int regRoot; /* Register holding root page number for new objects */ 1514 1515 /* Above is constant between recursions. Below is reset before and after 1516 ** each recursion */ 1517 1518 int nVar; /* Number of '?' variables seen in the SQL so far */ 1519 int nVarExpr; /* Number of used slots in apVarExpr[] */ 1520 int nVarExprAlloc; /* Number of allocated slots in apVarExpr[] */ 1521 Expr **apVarExpr; /* Pointers to :aaa and $aaaa wildcard expressions */ 1522 u8 explain; /* True if the EXPLAIN flag is found on the query */ 1523 Token sErrToken; /* The token at which the error occurred */ 1524 Token sNameToken; /* Token with unqualified schema object name */ 1525 Token sLastToken; /* The last token parsed */ 1526 const char *zSql; /* All SQL text */ 1527 const char *zTail; /* All SQL text past the last semicolon parsed */ 1528 Table *pNewTable; /* A table being constructed by CREATE TABLE */ 1529 Trigger *pNewTrigger; /* Trigger under construct by a CREATE TRIGGER */ 1530 TriggerStack *trigStack; /* Trigger actions being coded */ 1531 const char *zAuthContext; /* The 6th parameter to db->xAuth callbacks */ 1532 #ifndef SQLITE_OMIT_VIRTUALTABLE 1533 Token sArg; /* Complete text of a module argument */ 1534 u8 declareVtab; /* True if inside sqlite3_declare_vtab() */ 1535 Table *pVirtualLock; /* Require virtual table lock on this table */ 1536 #endif 1537 #if defined(SQLITE_TEST) || SQLITE_MAX_EXPR_DEPTH>0 1538 int nHeight; /* Expression tree height of current sub-select */ 1539 #endif 1540 }; 1541 1542 #ifdef SQLITE_OMIT_VIRTUALTABLE 1543 #define IN_DECLARE_VTAB 0 1544 #else 1545 #define IN_DECLARE_VTAB (pParse->declareVtab) 1546 #endif 1547 1548 /* 1549 ** An instance of the following structure can be declared on a stack and used 1550 ** to save the Parse.zAuthContext value so that it can be restored later. 1551 */ 1552 struct AuthContext { 1553 const char *zAuthContext; /* Put saved Parse.zAuthContext here */ 1554 Parse *pParse; /* The Parse structure */ 1555 }; 1556 1557 /* 1558 ** Bitfield flags for P2 value in OP_Insert and OP_Delete 1559 */ 1560 #define OPFLAG_NCHANGE 1 /* Set to update db->nChange */ 1561 #define OPFLAG_LASTROWID 2 /* Set to update db->lastRowid */ 1562 #define OPFLAG_ISUPDATE 4 /* This OP_Insert is an sql UPDATE */ 1563 #define OPFLAG_APPEND 8 /* This is likely to be an append */ 1564 1565 /* 1566 * Each trigger present in the database schema is stored as an instance of 1567 * struct Trigger. 1568 * 1569 * Pointers to instances of struct Trigger are stored in two ways. 1570 * 1. In the "trigHash" hash table (part of the sqlite3* that represents the 1571 * database). This allows Trigger structures to be retrieved by name. 1572 * 2. All triggers associated with a single table form a linked list, using the 1573 * pNext member of struct Trigger. A pointer to the first element of the 1574 * linked list is stored as the "pTrigger" member of the associated 1575 * struct Table. 1576 * 1577 * The "step_list" member points to the first element of a linked list 1578 * containing the SQL statements specified as the trigger program. 1579 */ 1580 struct Trigger { 1581 char *name; /* The name of the trigger */ 1582 char *table; /* The table or view to which the trigger applies */ 1583 u8 op; /* One of TK_DELETE, TK_UPDATE, TK_INSERT */ 1584 u8 tr_tm; /* One of TRIGGER_BEFORE, TRIGGER_AFTER */ 1585 Expr *pWhen; /* The WHEN clause of the expresion (may be NULL) */ 1586 IdList *pColumns; /* If this is an UPDATE OF <column-list> trigger, 1587 the <column-list> is stored here */ 1588 Token nameToken; /* Token containing zName. Use during parsing only */ 1589 Schema *pSchema; /* Schema containing the trigger */ 1590 Schema *pTabSchema; /* Schema containing the table */ 1591 TriggerStep *step_list; /* Link list of trigger program steps */ 1592 Trigger *pNext; /* Next trigger associated with the table */ 1593 }; 1594 1595 /* 1596 ** A trigger is either a BEFORE or an AFTER trigger. The following constants 1597 ** determine which. 1598 ** 1599 ** If there are multiple triggers, you might of some BEFORE and some AFTER. 1600 ** In that cases, the constants below can be ORed together. 1601 */ 1602 #define TRIGGER_BEFORE 1 1603 #define TRIGGER_AFTER 2 1604 1605 /* 1606 * An instance of struct TriggerStep is used to store a single SQL statement 1607 * that is a part of a trigger-program. 1608 * 1609 * Instances of struct TriggerStep are stored in a singly linked list (linked 1610 * using the "pNext" member) referenced by the "step_list" member of the 1611 * associated struct Trigger instance. The first element of the linked list is 1612 * the first step of the trigger-program. 1613 * 1614 * The "op" member indicates whether this is a "DELETE", "INSERT", "UPDATE" or 1615 * "SELECT" statement. The meanings of the other members is determined by the 1616 * value of "op" as follows: 1617 * 1618 * (op == TK_INSERT) 1619 * orconf -> stores the ON CONFLICT algorithm 1620 * pSelect -> If this is an INSERT INTO ... SELECT ... statement, then 1621 * this stores a pointer to the SELECT statement. Otherwise NULL. 1622 * target -> A token holding the name of the table to insert into. 1623 * pExprList -> If this is an INSERT INTO ... VALUES ... statement, then 1624 * this stores values to be inserted. Otherwise NULL. 1625 * pIdList -> If this is an INSERT INTO ... (<column-names>) VALUES ... 1626 * statement, then this stores the column-names to be 1627 * inserted into. 1628 * 1629 * (op == TK_DELETE) 1630 * target -> A token holding the name of the table to delete from. 1631 * pWhere -> The WHERE clause of the DELETE statement if one is specified. 1632 * Otherwise NULL. 1633 * 1634 * (op == TK_UPDATE) 1635 * target -> A token holding the name of the table to update rows of. 1636 * pWhere -> The WHERE clause of the UPDATE statement if one is specified. 1637 * Otherwise NULL. 1638 * pExprList -> A list of the columns to update and the expressions to update 1639 * them to. See sqlite3Update() documentation of "pChanges" 1640 * argument. 1641 * 1642 */ 1643 struct TriggerStep { 1644 int op; /* One of TK_DELETE, TK_UPDATE, TK_INSERT, TK_SELECT */ 1645 int orconf; /* OE_Rollback etc. */ 1646 Trigger *pTrig; /* The trigger that this step is a part of */ 1647 1648 Select *pSelect; /* Valid for SELECT and sometimes 1649 INSERT steps (when pExprList == 0) */ 1650 Token target; /* Valid for DELETE, UPDATE, INSERT steps */ 1651 Expr *pWhere; /* Valid for DELETE, UPDATE steps */ 1652 ExprList *pExprList; /* Valid for UPDATE statements and sometimes 1653 INSERT steps (when pSelect == 0) */ 1654 IdList *pIdList; /* Valid for INSERT statements only */ 1655 TriggerStep *pNext; /* Next in the link-list */ 1656 TriggerStep *pLast; /* Last element in link-list. Valid for 1st elem only */ 1657 }; 1658 1659 /* 1660 * An instance of struct TriggerStack stores information required during code 1661 * generation of a single trigger program. While the trigger program is being 1662 * coded, its associated TriggerStack instance is pointed to by the 1663 * "pTriggerStack" member of the Parse structure. 1664 * 1665 * The pTab member points to the table that triggers are being coded on. The 1666 * newIdx member contains the index of the vdbe cursor that points at the temp 1667 * table that stores the new.* references. If new.* references are not valid 1668 * for the trigger being coded (for example an ON DELETE trigger), then newIdx 1669 * is set to -1. The oldIdx member is analogous to newIdx, for old.* references. 1670 * 1671 * The ON CONFLICT policy to be used for the trigger program steps is stored 1672 * as the orconf member. If this is OE_Default, then the ON CONFLICT clause 1673 * specified for individual triggers steps is used. 1674 * 1675 * struct TriggerStack has a "pNext" member, to allow linked lists to be 1676 * constructed. When coding nested triggers (triggers fired by other triggers) 1677 * each nested trigger stores its parent trigger's TriggerStack as the "pNext" 1678 * pointer. Once the nested trigger has been coded, the pNext value is restored 1679 * to the pTriggerStack member of the Parse stucture and coding of the parent 1680 * trigger continues. 1681 * 1682 * Before a nested trigger is coded, the linked list pointed to by the 1683 * pTriggerStack is scanned to ensure that the trigger is not about to be coded 1684 * recursively. If this condition is detected, the nested trigger is not coded. 1685 */ 1686 struct TriggerStack { 1687 Table *pTab; /* Table that triggers are currently being coded on */ 1688 int newIdx; /* Index of vdbe cursor to "new" temp table */ 1689 int oldIdx; /* Index of vdbe cursor to "old" temp table */ 1690 u32 newColMask; 1691 u32 oldColMask; 1692 int orconf; /* Current orconf policy */ 1693 int ignoreJump; /* where to jump to for a RAISE(IGNORE) */ 1694 Trigger *pTrigger; /* The trigger currently being coded */ 1695 TriggerStack *pNext; /* Next trigger down on the trigger stack */ 1696 }; 1697 1698 /* 1699 ** The following structure contains information used by the sqliteFix... 1700 ** routines as they walk the parse tree to make database references 1701 ** explicit. 1702 */ 1703 typedef struct DbFixer DbFixer; 1704 struct DbFixer { 1705 Parse *pParse; /* The parsing context. Error messages written here */ 1706 const char *zDb; /* Make sure all objects are contained in this database */ 1707 const char *zType; /* Type of the container - used for error messages */ 1708 const Token *pName; /* Name of the container - used for error messages */ 1709 }; 1710 1711 /* 1712 ** An objected used to accumulate the text of a string where we 1713 ** do not necessarily know how big the string will be in the end. 1714 */ 1715 struct StrAccum { 1716 char *zBase; /* A base allocation. Not from malloc. */ 1717 char *zText; /* The string collected so far */ 1718 int nChar; /* Length of the string so far */ 1719 int nAlloc; /* Amount of space allocated in zText */ 1720 int mxAlloc; /* Maximum allowed string length */ 1721 u8 mallocFailed; /* Becomes true if any memory allocation fails */ 1722 u8 useMalloc; /* True if zText is enlargable using realloc */ 1723 u8 tooBig; /* Becomes true if string size exceeds limits */ 1724 }; 1725 1726 /* 1727 ** A pointer to this structure is used to communicate information 1728 ** from sqlite3Init and OP_ParseSchema into the sqlite3InitCallback. 1729 */ 1730 typedef struct { 1731 sqlite3 *db; /* The database being initialized */ 1732 int iDb; /* 0 for main database. 1 for TEMP, 2.. for ATTACHed */ 1733 char **pzErrMsg; /* Error message stored here */ 1734 int rc; /* Result code stored here */ 1735 } InitData; 1736 1737 /* 1738 ** Assuming zIn points to the first byte of a UTF-8 character, 1739 ** advance zIn to point to the first byte of the next UTF-8 character. 1740 */ 1741 #define SQLITE_SKIP_UTF8(zIn) { \ 1742 if( (*(zIn++))>=0xc0 ){ \ 1743 while( (*zIn & 0xc0)==0x80 ){ zIn++; } \ 1744 } \ 1745 } 1746 1747 /* 1748 ** The SQLITE_CORRUPT_BKPT macro can be either a constant (for production 1749 ** builds) or a function call (for debugging). If it is a function call, 1750 ** it allows the operator to set a breakpoint at the spot where database 1751 ** corruption is first detected. 1752 */ 1753 #ifdef SQLITE_DEBUG 1754 int sqlite3Corrupt(void); 1755 # define SQLITE_CORRUPT_BKPT sqlite3Corrupt() 1756 # define DEBUGONLY(X) X 1757 #else 1758 # define SQLITE_CORRUPT_BKPT SQLITE_CORRUPT 1759 # define DEBUGONLY(X) 1760 #endif 1761 1762 /* 1763 ** Internal function prototypes 1764 */ 1765 int sqlite3StrICmp(const char *, const char *); 1766 int sqlite3StrNICmp(const char *, const char *, int); 1767 int sqlite3IsNumber(const char*, int*, u8); 1768 1769 void *sqlite3MallocZero(unsigned); 1770 void *sqlite3DbMallocZero(sqlite3*, unsigned); 1771 void *sqlite3DbMallocRaw(sqlite3*, unsigned); 1772 char *sqlite3StrDup(const char*); 1773 char *sqlite3StrNDup(const char*, int); 1774 char *sqlite3DbStrDup(sqlite3*,const char*); 1775 char *sqlite3DbStrNDup(sqlite3*,const char*, int); 1776 void *sqlite3DbReallocOrFree(sqlite3 *, void *, int); 1777 void *sqlite3DbRealloc(sqlite3 *, void *, int); 1778 int sqlite3MallocSize(void *); 1779 1780 char *sqlite3MPrintf(sqlite3*,const char*, ...); 1781 char *sqlite3VMPrintf(sqlite3*,const char*, va_list); 1782 #if defined(SQLITE_TEST) || defined(SQLITE_DEBUG) 1783 void sqlite3DebugPrintf(const char*, ...); 1784 #endif 1785 #if defined(SQLITE_TEST) 1786 void *sqlite3TextToPtr(const char*); 1787 #endif 1788 void sqlite3SetString(char **, ...); 1789 void sqlite3ErrorMsg(Parse*, const char*, ...); 1790 void sqlite3ErrorClear(Parse*); 1791 void sqlite3Dequote(char*); 1792 void sqlite3DequoteExpr(sqlite3*, Expr*); 1793 int sqlite3KeywordCode(const unsigned char*, int); 1794 int sqlite3RunParser(Parse*, const char*, char **); 1795 void sqlite3FinishCoding(Parse*); 1796 int sqlite3GetTempReg(Parse*); 1797 void sqlite3ReleaseTempReg(Parse*,int); 1798 int sqlite3GetTempRange(Parse*,int); 1799 void sqlite3ReleaseTempRange(Parse*,int,int); 1800 Expr *sqlite3Expr(sqlite3*, int, Expr*, Expr*, const Token*); 1801 Expr *sqlite3PExpr(Parse*, int, Expr*, Expr*, const Token*); 1802 Expr *sqlite3RegisterExpr(Parse*,Token*); 1803 Expr *sqlite3ExprAnd(sqlite3*,Expr*, Expr*); 1804 void sqlite3ExprSpan(Expr*,Token*,Token*); 1805 Expr *sqlite3ExprFunction(Parse*,ExprList*, Token*); 1806 void sqlite3ExprAssignVarNumber(Parse*, Expr*); 1807 void sqlite3ExprDelete(Expr*); 1808 ExprList *sqlite3ExprListAppend(Parse*,ExprList*,Expr*,Token*); 1809 void sqlite3ExprListDelete(ExprList*); 1810 int sqlite3Init(sqlite3*, char**); 1811 int sqlite3InitCallback(void*, int, char**, char**); 1812 void sqlite3Pragma(Parse*,Token*,Token*,Token*,int); 1813 void sqlite3ResetInternalSchema(sqlite3*, int); 1814 void sqlite3BeginParse(Parse*,int); 1815 void sqlite3CommitInternalChanges(sqlite3*); 1816 Table *sqlite3ResultSetOfSelect(Parse*,char*,Select*); 1817 void sqlite3OpenMasterTable(Parse *, int); 1818 void sqlite3StartTable(Parse*,Token*,Token*,int,int,int,int); 1819 void sqlite3AddColumn(Parse*,Token*); 1820 void sqlite3AddNotNull(Parse*, int); 1821 void sqlite3AddPrimaryKey(Parse*, ExprList*, int, int, int); 1822 void sqlite3AddCheckConstraint(Parse*, Expr*); 1823 void sqlite3AddColumnType(Parse*,Token*); 1824 void sqlite3AddDefaultValue(Parse*,Expr*); 1825 void sqlite3AddCollateType(Parse*, Token*); 1826 void sqlite3EndTable(Parse*,Token*,Token*,Select*); 1827 1828 Bitvec *sqlite3BitvecCreate(u32); 1829 int sqlite3BitvecTest(Bitvec*, u32); 1830 int sqlite3BitvecSet(Bitvec*, u32); 1831 void sqlite3BitvecClear(Bitvec*, u32); 1832 void sqlite3BitvecDestroy(Bitvec*); 1833 int sqlite3BitvecBuiltinTest(int,int*); 1834 1835 void sqlite3CreateView(Parse*,Token*,Token*,Token*,Select*,int,int); 1836 1837 #if !defined(SQLITE_OMIT_VIEW) || !defined(SQLITE_OMIT_VIRTUALTABLE) 1838 int sqlite3ViewGetColumnNames(Parse*,Table*); 1839 #else 1840 # define sqlite3ViewGetColumnNames(A,B) 0 1841 #endif 1842 1843 void sqlite3DropTable(Parse*, SrcList*, int, int); 1844 void sqlite3DeleteTable(Table*); 1845 void sqlite3Insert(Parse*, SrcList*, ExprList*, Select*, IdList*, int); 1846 void *sqlite3ArrayAllocate(sqlite3*,void*,int,int,int*,int*,int*); 1847 IdList *sqlite3IdListAppend(sqlite3*, IdList*, Token*); 1848 int sqlite3IdListIndex(IdList*,const char*); 1849 SrcList *sqlite3SrcListAppend(sqlite3*, SrcList*, Token*, Token*); 1850 SrcList *sqlite3SrcListAppendFromTerm(Parse*, SrcList*, Token*, Token*, Token*, 1851 Select*, Expr*, IdList*); 1852 void sqlite3SrcListShiftJoinType(SrcList*); 1853 void sqlite3SrcListAssignCursors(Parse*, SrcList*); 1854 void sqlite3IdListDelete(IdList*); 1855 void sqlite3SrcListDelete(SrcList*); 1856 void sqlite3CreateIndex(Parse*,Token*,Token*,SrcList*,ExprList*,int,Token*, 1857 Token*, int, int); 1858 void sqlite3DropIndex(Parse*, SrcList*, int); 1859 int sqlite3Select(Parse*, Select*, SelectDest*, Select*, int, int*, char *aff); 1860 Select *sqlite3SelectNew(Parse*,ExprList*,SrcList*,Expr*,ExprList*, 1861 Expr*,ExprList*,int,Expr*,Expr*); 1862 void sqlite3SelectDelete(Select*); 1863 Table *sqlite3SrcListLookup(Parse*, SrcList*); 1864 int sqlite3IsReadOnly(Parse*, Table*, int); 1865 void sqlite3OpenTable(Parse*, int iCur, int iDb, Table*, int); 1866 void sqlite3DeleteFrom(Parse*, SrcList*, Expr*); 1867 void sqlite3Update(Parse*, SrcList*, ExprList*, Expr*, int); 1868 WhereInfo *sqlite3WhereBegin(Parse*, SrcList*, Expr*, ExprList**, u8); 1869 void sqlite3WhereEnd(WhereInfo*); 1870 int sqlite3ExprCodeGetColumn(Parse*, Table*, int, int, int, int); 1871 void sqlite3ExprCodeMove(Parse*, int, int); 1872 void sqlite3ExprClearColumnCache(Parse*, int); 1873 void sqlite3ExprCacheAffinityChange(Parse*, int, int); 1874 int sqlite3ExprWritableRegister(Parse*,int,int); 1875 int sqlite3ExprCode(Parse*, Expr*, int); 1876 int sqlite3ExprCodeTemp(Parse*, Expr*, int*); 1877 int sqlite3ExprCodeTarget(Parse*, Expr*, int); 1878 int sqlite3ExprCodeAndCache(Parse*, Expr*, int); 1879 void sqlite3ExprCodeConstants(Parse*, Expr*); 1880 int sqlite3ExprCodeExprList(Parse*, ExprList*, int); 1881 void sqlite3ExprIfTrue(Parse*, Expr*, int, int); 1882 void sqlite3ExprIfFalse(Parse*, Expr*, int, int); 1883 Table *sqlite3FindTable(sqlite3*,const char*, const char*); 1884 Table *sqlite3LocateTable(Parse*,int isView,const char*, const char*); 1885 Index *sqlite3FindIndex(sqlite3*,const char*, const char*); 1886 void sqlite3UnlinkAndDeleteTable(sqlite3*,int,const char*); 1887 void sqlite3UnlinkAndDeleteIndex(sqlite3*,int,const char*); 1888 void sqlite3Vacuum(Parse*); 1889 int sqlite3RunVacuum(char**, sqlite3*); 1890 char *sqlite3NameFromToken(sqlite3*, Token*); 1891 int sqlite3ExprCompare(Expr*, Expr*); 1892 int sqlite3ExprResolveNames(NameContext *, Expr *); 1893 void sqlite3ExprAnalyzeAggregates(NameContext*, Expr*); 1894 void sqlite3ExprAnalyzeAggList(NameContext*,ExprList*); 1895 Vdbe *sqlite3GetVdbe(Parse*); 1896 Expr *sqlite3CreateIdExpr(Parse *, const char*); 1897 void sqlite3PrngSaveState(void); 1898 void sqlite3PrngRestoreState(void); 1899 void sqlite3PrngResetState(void); 1900 void sqlite3RollbackAll(sqlite3*); 1901 void sqlite3CodeVerifySchema(Parse*, int); 1902 void sqlite3BeginTransaction(Parse*, int); 1903 void sqlite3CommitTransaction(Parse*); 1904 void sqlite3RollbackTransaction(Parse*); 1905 int sqlite3ExprIsConstant(Expr*); 1906 int sqlite3ExprIsConstantNotJoin(Expr*); 1907 int sqlite3ExprIsConstantOrFunction(Expr*); 1908 int sqlite3ExprIsInteger(Expr*, int*); 1909 int sqlite3IsRowid(const char*); 1910 void sqlite3GenerateRowDelete(Parse*, Table*, int, int, int); 1911 void sqlite3GenerateRowIndexDelete(Parse*, Table*, int, int*); 1912 int sqlite3GenerateIndexKey(Parse*, Index*, int, int, int); 1913 void sqlite3GenerateConstraintChecks(Parse*,Table*,int,int, 1914 int*,int,int,int,int); 1915 void sqlite3CompleteInsertion(Parse*, Table*, int, int, int*,int,int,int,int); 1916 int sqlite3OpenTableAndIndices(Parse*, Table*, int, int); 1917 void sqlite3BeginWriteOperation(Parse*, int, int); 1918 Expr *sqlite3ExprDup(sqlite3*,Expr*); 1919 void sqlite3TokenCopy(sqlite3*,Token*, Token*); 1920 ExprList *sqlite3ExprListDup(sqlite3*,ExprList*); 1921 SrcList *sqlite3SrcListDup(sqlite3*,SrcList*); 1922 IdList *sqlite3IdListDup(sqlite3*,IdList*); 1923 Select *sqlite3SelectDup(sqlite3*,Select*); 1924 FuncDef *sqlite3FindFunction(sqlite3*,const char*,int,int,u8,int); 1925 void sqlite3RegisterBuiltinFunctions(sqlite3*); 1926 void sqlite3RegisterDateTimeFunctions(sqlite3*); 1927 #ifdef SQLITE_DEBUG 1928 int sqlite3SafetyOn(sqlite3*); 1929 int sqlite3SafetyOff(sqlite3*); 1930 #else 1931 # define sqlite3SafetyOn(A) 0 1932 # define sqlite3SafetyOff(A) 0 1933 #endif 1934 int sqlite3SafetyCheckOk(sqlite3*); 1935 int sqlite3SafetyCheckSickOrOk(sqlite3*); 1936 void sqlite3ChangeCookie(Parse*, int); 1937 void sqlite3MaterializeView(Parse*, Select*, Expr*, u32, int); 1938 1939 #ifndef SQLITE_OMIT_TRIGGER 1940 void sqlite3BeginTrigger(Parse*, Token*,Token*,int,int,IdList*,SrcList*, 1941 Expr*,int, int); 1942 void sqlite3FinishTrigger(Parse*, TriggerStep*, Token*); 1943 void sqlite3DropTrigger(Parse*, SrcList*, int); 1944 void sqlite3DropTriggerPtr(Parse*, Trigger*); 1945 int sqlite3TriggersExist(Parse*, Table*, int, ExprList*); 1946 int sqlite3CodeRowTrigger(Parse*, int, ExprList*, int, Table *, int, int, 1947 int, int, u32*, u32*); 1948 void sqliteViewTriggers(Parse*, Table*, Expr*, int, ExprList*); 1949 void sqlite3DeleteTriggerStep(TriggerStep*); 1950 TriggerStep *sqlite3TriggerSelectStep(sqlite3*,Select*); 1951 TriggerStep *sqlite3TriggerInsertStep(sqlite3*,Token*, IdList*, 1952 ExprList*,Select*,int); 1953 TriggerStep *sqlite3TriggerUpdateStep(sqlite3*,Token*,ExprList*, Expr*, int); 1954 TriggerStep *sqlite3TriggerDeleteStep(sqlite3*,Token*, Expr*); 1955 void sqlite3DeleteTrigger(Trigger*); 1956 void sqlite3UnlinkAndDeleteTrigger(sqlite3*,int,const char*); 1957 void sqlite3SelectMask(Parse *, Select *, u32); 1958 #else 1959 # define sqlite3TriggersExist(A,B,C,D,E,F) 0 1960 # define sqlite3DeleteTrigger(A) 1961 # define sqlite3DropTriggerPtr(A,B) 1962 # define sqlite3UnlinkAndDeleteTrigger(A,B,C) 1963 # define sqlite3CodeRowTrigger(A,B,C,D,E,F,G,H,I,J,K) 0 1964 # define sqlite3SelectMask(A, B, C) 1965 #endif 1966 1967 int sqlite3JoinType(Parse*, Token*, Token*, Token*); 1968 void sqlite3CreateForeignKey(Parse*, ExprList*, Token*, ExprList*, int); 1969 void sqlite3DeferForeignKey(Parse*, int); 1970 #ifndef SQLITE_OMIT_AUTHORIZATION 1971 void sqlite3AuthRead(Parse*,Expr*,Schema*,SrcList*); 1972 int sqlite3AuthCheck(Parse*,int, const char*, const char*, const char*); 1973 void sqlite3AuthContextPush(Parse*, AuthContext*, const char*); 1974 void sqlite3AuthContextPop(AuthContext*); 1975 #else 1976 # define sqlite3AuthRead(a,b,c,d) 1977 # define sqlite3AuthCheck(a,b,c,d,e) SQLITE_OK 1978 # define sqlite3AuthContextPush(a,b,c) 1979 # define sqlite3AuthContextPop(a) ((void)(a)) 1980 #endif 1981 void sqlite3Attach(Parse*, Expr*, Expr*, Expr*); 1982 void sqlite3Detach(Parse*, Expr*); 1983 int sqlite3BtreeFactory(const sqlite3 *db, const char *zFilename, 1984 int omitJournal, int nCache, int flags, Btree **ppBtree); 1985 int sqlite3FixInit(DbFixer*, Parse*, int, const char*, const Token*); 1986 int sqlite3FixSrcList(DbFixer*, SrcList*); 1987 int sqlite3FixSelect(DbFixer*, Select*); 1988 int sqlite3FixExpr(DbFixer*, Expr*); 1989 int sqlite3FixExprList(DbFixer*, ExprList*); 1990 int sqlite3FixTriggerStep(DbFixer*, TriggerStep*); 1991 int sqlite3AtoF(const char *z, double*); 1992 char *sqlite3_snprintf(int,char*,const char*,...); 1993 int sqlite3GetInt32(const char *, int*); 1994 int sqlite3FitsIn64Bits(const char *, int); 1995 int sqlite3Utf16ByteLen(const void *pData, int nChar); 1996 int sqlite3Utf8CharLen(const char *pData, int nByte); 1997 int sqlite3Utf8Read(const u8*, const u8*, const u8**); 1998 int sqlite3PutVarint(unsigned char*, u64); 1999 int sqlite3PutVarint32(unsigned char*, u32); 2000 int sqlite3GetVarint(const unsigned char *, u64 *); 2001 int sqlite3GetVarint32(const unsigned char *, u32 *); 2002 int sqlite3VarintLen(u64 v); 2003 void sqlite3IndexAffinityStr(Vdbe *, Index *); 2004 void sqlite3TableAffinityStr(Vdbe *, Table *); 2005 char sqlite3CompareAffinity(Expr *pExpr, char aff2); 2006 int sqlite3IndexAffinityOk(Expr *pExpr, char idx_affinity); 2007 char sqlite3ExprAffinity(Expr *pExpr); 2008 int sqlite3Atoi64(const char*, i64*); 2009 void sqlite3Error(sqlite3*, int, const char*,...); 2010 void *sqlite3HexToBlob(sqlite3*, const char *z, int n); 2011 int sqlite3TwoPartName(Parse *, Token *, Token *, Token **); 2012 const char *sqlite3ErrStr(int); 2013 int sqlite3ReadSchema(Parse *pParse); 2014 CollSeq *sqlite3FindCollSeq(sqlite3*,u8 enc, const char *,int,int); 2015 CollSeq *sqlite3LocateCollSeq(Parse *pParse, const char *zName, int nName); 2016 CollSeq *sqlite3ExprCollSeq(Parse *pParse, Expr *pExpr); 2017 Expr *sqlite3ExprSetColl(Parse *pParse, Expr *, Token *); 2018 int sqlite3CheckCollSeq(Parse *, CollSeq *); 2019 int sqlite3CheckObjectName(Parse *, const char *); 2020 void sqlite3VdbeSetChanges(sqlite3 *, int); 2021 2022 const void *sqlite3ValueText(sqlite3_value*, u8); 2023 int sqlite3ValueBytes(sqlite3_value*, u8); 2024 void sqlite3ValueSetStr(sqlite3_value*, int, const void *,u8, 2025 void(*)(void*)); 2026 void sqlite3ValueFree(sqlite3_value*); 2027 sqlite3_value *sqlite3ValueNew(sqlite3 *); 2028 char *sqlite3Utf16to8(sqlite3 *, const void*, int); 2029 int sqlite3ValueFromExpr(sqlite3 *, Expr *, u8, u8, sqlite3_value **); 2030 void sqlite3ValueApplyAffinity(sqlite3_value *, u8, u8); 2031 #ifndef SQLITE_AMALGAMATION 2032 extern const unsigned char sqlite3UpperToLower[]; 2033 #endif 2034 void sqlite3RootPageMoved(Db*, int, int); 2035 void sqlite3Reindex(Parse*, Token*, Token*); 2036 void sqlite3AlterFunctions(sqlite3*); 2037 void sqlite3AlterRenameTable(Parse*, SrcList*, Token*); 2038 int sqlite3GetToken(const unsigned char *, int *); 2039 void sqlite3NestedParse(Parse*, const char*, ...); 2040 void sqlite3ExpirePreparedStatements(sqlite3*); 2041 void sqlite3CodeSubselect(Parse *, Expr *); 2042 int sqlite3SelectResolve(Parse *, Select *, NameContext *); 2043 void sqlite3ColumnDefault(Vdbe *, Table *, int); 2044 void sqlite3AlterFinishAddColumn(Parse *, Token *); 2045 void sqlite3AlterBeginAddColumn(Parse *, SrcList *); 2046 CollSeq *sqlite3GetCollSeq(sqlite3*, CollSeq *, const char *, int); 2047 char sqlite3AffinityType(const Token*); 2048 void sqlite3Analyze(Parse*, Token*, Token*); 2049 int sqlite3InvokeBusyHandler(BusyHandler*); 2050 int sqlite3FindDb(sqlite3*, Token*); 2051 int sqlite3AnalysisLoad(sqlite3*,int iDB); 2052 void sqlite3DefaultRowEst(Index*); 2053 void sqlite3RegisterLikeFunctions(sqlite3*, int); 2054 int sqlite3IsLikeFunction(sqlite3*,Expr*,int*,char*); 2055 void sqlite3AttachFunctions(sqlite3 *); 2056 void sqlite3MinimumFileFormat(Parse*, int, int); 2057 void sqlite3SchemaFree(void *); 2058 Schema *sqlite3SchemaGet(sqlite3 *, Btree *); 2059 int sqlite3SchemaToIndex(sqlite3 *db, Schema *); 2060 KeyInfo *sqlite3IndexKeyinfo(Parse *, Index *); 2061 int sqlite3CreateFunc(sqlite3 *, const char *, int, int, void *, 2062 void (*)(sqlite3_context*,int,sqlite3_value **), 2063 void (*)(sqlite3_context*,int,sqlite3_value **), void (*)(sqlite3_context*)); 2064 int sqlite3ApiExit(sqlite3 *db, int); 2065 int sqlite3OpenTempDatabase(Parse *); 2066 2067 void sqlite3StrAccumAppend(StrAccum*,const char*,int); 2068 char *sqlite3StrAccumFinish(StrAccum*); 2069 void sqlite3StrAccumReset(StrAccum*); 2070 void sqlite3SelectDestInit(SelectDest*,int,int); 2071 2072 /* 2073 ** The interface to the LEMON-generated parser 2074 */ 2075 void *sqlite3ParserAlloc(void*(*)(size_t)); 2076 void sqlite3ParserFree(void*, void(*)(void*)); 2077 void sqlite3Parser(void*, int, Token, Parse*); 2078 2079 int sqlite3AutoLoadExtensions(sqlite3*); 2080 #ifndef SQLITE_OMIT_LOAD_EXTENSION 2081 void sqlite3CloseExtensions(sqlite3*); 2082 #else 2083 # define sqlite3CloseExtensions(X) 2084 #endif 2085 2086 #ifndef SQLITE_OMIT_SHARED_CACHE 2087 void sqlite3TableLock(Parse *, int, int, u8, const char *); 2088 #else 2089 #define sqlite3TableLock(v,w,x,y,z) 2090 #endif 2091 2092 #ifdef SQLITE_TEST 2093 int sqlite3Utf8To8(unsigned char*); 2094 #endif 2095 2096 #ifdef SQLITE_OMIT_VIRTUALTABLE 2097 # define sqlite3VtabClear(X) 2098 # define sqlite3VtabSync(X,Y) (Y) 2099 # define sqlite3VtabRollback(X) 2100 # define sqlite3VtabCommit(X) 2101 #else 2102 void sqlite3VtabClear(Table*); 2103 int sqlite3VtabSync(sqlite3 *db, int rc); 2104 int sqlite3VtabRollback(sqlite3 *db); 2105 int sqlite3VtabCommit(sqlite3 *db); 2106 #endif 2107 void sqlite3VtabLock(sqlite3_vtab*); 2108 void sqlite3VtabUnlock(sqlite3*, sqlite3_vtab*); 2109 void sqlite3VtabBeginParse(Parse*, Token*, Token*, Token*); 2110 void sqlite3VtabFinishParse(Parse*, Token*); 2111 void sqlite3VtabArgInit(Parse*); 2112 void sqlite3VtabArgExtend(Parse*, Token*); 2113 int sqlite3VtabCallCreate(sqlite3*, int, const char *, char **); 2114 int sqlite3VtabCallConnect(Parse*, Table*); 2115 int sqlite3VtabCallDestroy(sqlite3*, int, const char *); 2116 int sqlite3VtabBegin(sqlite3 *, sqlite3_vtab *); 2117 FuncDef *sqlite3VtabOverloadFunction(sqlite3 *,FuncDef*, int nArg, Expr*); 2118 void sqlite3InvalidFunction(sqlite3_context*,int,sqlite3_value**); 2119 int sqlite3Reprepare(Vdbe*); 2120 void sqlite3ExprListCheckLength(Parse*, ExprList*, const char*); 2121 CollSeq *sqlite3BinaryCompareCollSeq(Parse *, Expr *, Expr *); 2122 2123 2124 /* 2125 ** Available fault injectors. Should be numbered beginning with 0. 2126 */ 2127 #define SQLITE_FAULTINJECTOR_MALLOC 0 2128 #define SQLITE_FAULTINJECTOR_COUNT 1 2129 2130 /* 2131 ** The interface to the fault injector subsystem. If the fault injector 2132 ** mechanism is disabled at compile-time then set up macros so that no 2133 ** unnecessary code is generated. 2134 */ 2135 #ifndef SQLITE_OMIT_BUILTIN_TEST 2136 void sqlite3FaultConfig(int,int,int); 2137 int sqlite3FaultFailures(int); 2138 int sqlite3FaultBenignFailures(int); 2139 int sqlite3FaultPending(int); 2140 void sqlite3FaultBenign(int,int); 2141 int sqlite3FaultStep(int); 2142 #else 2143 # define sqlite3FaultConfig(A,B,C) 2144 # define sqlite3FaultFailures(A) 0 2145 # define sqlite3FaultBenignFailures(A) 0 2146 # define sqlite3FaultPending(A) (-1) 2147 # define sqlite3FaultBenign(A,B) 2148 # define sqlite3FaultStep(A) 0 2149 #endif 2150 2151 2152 2153 #define IN_INDEX_ROWID 1 2154 #define IN_INDEX_EPH 2 2155 #define IN_INDEX_INDEX 3 2156 int sqlite3FindInIndex(Parse *, Expr *, int); 2157 2158 #ifdef SQLITE_ENABLE_ATOMIC_WRITE 2159 int sqlite3JournalOpen(sqlite3_vfs *, const char *, sqlite3_file *, int, int); 2160 int sqlite3JournalSize(sqlite3_vfs *); 2161 int sqlite3JournalCreate(sqlite3_file *); 2162 #else 2163 #define sqlite3JournalSize(pVfs) ((pVfs)->szOsFile) 2164 #endif 2165 2166 #if defined(SQLITE_TEST) || SQLITE_MAX_EXPR_DEPTH>0 2167 void sqlite3ExprSetHeight(Expr *); 2168 int sqlite3SelectExprHeight(Select *); 2169 #else 2170 #define sqlite3ExprSetHeight(x) 2171 #endif 2172 2173 u32 sqlite3Get4byte(const u8*); 2174 void sqlite3Put4byte(u8*, u32); 2175 2176 #ifdef SQLITE_SSE 2177 #include "sseInt.h" 2178 #endif 2179 2180 #ifdef SQLITE_DEBUG 2181 void sqlite3ParserTrace(FILE*, char *); 2182 #endif 2183 2184 /* 2185 ** If the SQLITE_ENABLE IOTRACE exists then the global variable 2186 ** sqlite3IoTrace is a pointer to a printf-like routine used to 2187 ** print I/O tracing messages. 2188 */ 2189 #ifdef SQLITE_ENABLE_IOTRACE 2190 # define IOTRACE(A) if( sqlite3IoTrace ){ sqlite3IoTrace A; } 2191 void sqlite3VdbeIOTraceSql(Vdbe*); 2192 #else 2193 # define IOTRACE(A) 2194 # define sqlite3VdbeIOTraceSql(X) 2195 #endif 2196 SQLITE_EXTERN void (*sqlite3IoTrace)(const char*,...); 2197 2198 #endif 2199