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 1.618 2007/11/12 09:50:26 danielk1977 Exp $ 15 */ 16 #ifndef _SQLITEINT_H_ 17 #define _SQLITEINT_H_ 18 19 /* 20 ** These #defines should enable >2GB file support on Posix if the 21 ** underlying operating system supports it. If the OS lacks 22 ** large file support, or if the OS is windows, these should be no-ops. 23 ** 24 ** Ticket #2739: The _LARGEFILE_SOURCE macro must appear before any 25 ** system #includes. Hence, this block of code must be the very first 26 ** code in all source files. 27 ** 28 ** Large file support can be disabled using the -DSQLITE_DISABLE_LFS switch 29 ** on the compiler command line. This is necessary if you are compiling 30 ** on a recent machine (ex: RedHat 7.2) but you want your code to work 31 ** on an older machine (ex: RedHat 6.0). If you compile on RedHat 7.2 32 ** without this option, LFS is enable. But LFS does not exist in the kernel 33 ** in RedHat 6.0, so the code won't work. Hence, for maximum binary 34 ** portability you should omit LFS. 35 ** 36 ** Similar is true for MacOS. LFS is only supported on MacOS 9 and later. 37 */ 38 #ifndef SQLITE_DISABLE_LFS 39 # define _LARGE_FILE 1 40 # ifndef _FILE_OFFSET_BITS 41 # define _FILE_OFFSET_BITS 64 42 # endif 43 # define _LARGEFILE_SOURCE 1 44 #endif 45 46 47 #include "sqliteLimit.h" 48 49 /* 50 ** For testing purposes, the various size limit constants are really 51 ** variables that we can modify in the testfixture. 52 */ 53 #ifdef SQLITE_TEST 54 #undef SQLITE_MAX_LENGTH 55 #undef SQLITE_MAX_COLUMN 56 #undef SQLITE_MAX_SQL_LENGTH 57 #undef SQLITE_MAX_EXPR_DEPTH 58 #undef SQLITE_MAX_COMPOUND_SELECT 59 #undef SQLITE_MAX_VDBE_OP 60 #undef SQLITE_MAX_FUNCTION_ARG 61 #undef SQLITE_MAX_VARIABLE_NUMBER 62 #undef SQLITE_MAX_PAGE_SIZE 63 #undef SQLITE_MAX_PAGE_COUNT 64 #undef SQLITE_MAX_LIKE_PATTERN_LENGTH 65 66 #define SQLITE_MAX_LENGTH sqlite3MAX_LENGTH 67 #define SQLITE_MAX_COLUMN sqlite3MAX_COLUMN 68 #define SQLITE_MAX_SQL_LENGTH sqlite3MAX_SQL_LENGTH 69 #define SQLITE_MAX_EXPR_DEPTH sqlite3MAX_EXPR_DEPTH 70 #define SQLITE_MAX_COMPOUND_SELECT sqlite3MAX_COMPOUND_SELECT 71 #define SQLITE_MAX_VDBE_OP sqlite3MAX_VDBE_OP 72 #define SQLITE_MAX_FUNCTION_ARG sqlite3MAX_FUNCTION_ARG 73 #define SQLITE_MAX_VARIABLE_NUMBER sqlite3MAX_VARIABLE_NUMBER 74 #define SQLITE_MAX_PAGE_SIZE sqlite3MAX_PAGE_SIZE 75 #define SQLITE_MAX_PAGE_COUNT sqlite3MAX_PAGE_COUNT 76 #define SQLITE_MAX_LIKE_PATTERN_LENGTH sqlite3MAX_LIKE_PATTERN_LENGTH 77 78 extern int sqlite3MAX_LENGTH; 79 extern int sqlite3MAX_COLUMN; 80 extern int sqlite3MAX_SQL_LENGTH; 81 extern int sqlite3MAX_EXPR_DEPTH; 82 extern int sqlite3MAX_COMPOUND_SELECT; 83 extern int sqlite3MAX_VDBE_OP; 84 extern int sqlite3MAX_FUNCTION_ARG; 85 extern int sqlite3MAX_VARIABLE_NUMBER; 86 extern int sqlite3MAX_PAGE_SIZE; 87 extern int sqlite3MAX_PAGE_COUNT; 88 extern int sqlite3MAX_LIKE_PATTERN_LENGTH; 89 #endif 90 91 92 /* 93 ** The SQLITE_THREADSAFE macro must be defined as either 0 or 1. 94 ** Older versions of SQLite used an optional THREADSAFE macro. 95 ** We support that for legacy 96 */ 97 #if !defined(SQLITE_THREADSAFE) 98 #if defined(THREADSAFE) 99 # define SQLITE_THREADSAFE THREADSAFE 100 #else 101 # define SQLITE_THREADSAFE 1 102 #endif 103 #endif 104 105 /* 106 ** We need to define _XOPEN_SOURCE as follows in order to enable 107 ** recursive mutexes on most unix systems. But Mac OS X is different. 108 ** The _XOPEN_SOURCE define causes problems for Mac OS X we are told, 109 ** so it is omitted there. See ticket #2673. 110 ** 111 ** Later we learn that _XOPEN_SOURCE is poorly or incorrectly 112 ** implemented on some systems. So we avoid defining it at all 113 ** if it is already defined or if it is unneeded because we are 114 ** not doing a threadsafe build. Ticket #2681. 115 ** 116 ** See also ticket #2741. 117 */ 118 #if !defined(_XOPEN_SOURCE) && !defined(__MACOS__) && SQLITE_THREADSAFE 119 # define _XOPEN_SOURCE 500 /* Needed to enable pthread recursive mutexes */ 120 #endif 121 122 #if defined(SQLITE_TCL) || defined(TCLSH) 123 # include <tcl.h> 124 #endif 125 126 /* 127 ** Many people are failing to set -DNDEBUG=1 when compiling SQLite. 128 ** Setting NDEBUG makes the code smaller and run faster. So the following 129 ** lines are added to automatically set NDEBUG unless the -DSQLITE_DEBUG=1 130 ** option is set. Thus NDEBUG becomes an opt-in rather than an opt-out 131 ** feature. 132 */ 133 #if !defined(NDEBUG) && !defined(SQLITE_DEBUG) 134 # define NDEBUG 1 135 #endif 136 137 #include "sqlite3.h" 138 #include "hash.h" 139 #include "parse.h" 140 #include <stdio.h> 141 #include <stdlib.h> 142 #include <string.h> 143 #include <assert.h> 144 #include <stddef.h> 145 146 #define sqlite3_isnan(X) ((X)!=(X)) 147 148 /* 149 ** If compiling for a processor that lacks floating point support, 150 ** substitute integer for floating-point 151 */ 152 #ifdef SQLITE_OMIT_FLOATING_POINT 153 # define double sqlite_int64 154 # define LONGDOUBLE_TYPE sqlite_int64 155 # ifndef SQLITE_BIG_DBL 156 # define SQLITE_BIG_DBL (0x7fffffffffffffff) 157 # endif 158 # define SQLITE_OMIT_DATETIME_FUNCS 1 159 # define SQLITE_OMIT_TRACE 1 160 # undef SQLITE_MIXED_ENDIAN_64BIT_FLOAT 161 #endif 162 #ifndef SQLITE_BIG_DBL 163 # define SQLITE_BIG_DBL (1e99) 164 #endif 165 166 /* 167 ** OMIT_TEMPDB is set to 1 if SQLITE_OMIT_TEMPDB is defined, or 0 168 ** afterward. Having this macro allows us to cause the C compiler 169 ** to omit code used by TEMP tables without messy #ifndef statements. 170 */ 171 #ifdef SQLITE_OMIT_TEMPDB 172 #define OMIT_TEMPDB 1 173 #else 174 #define OMIT_TEMPDB 0 175 #endif 176 177 /* 178 ** If the following macro is set to 1, then NULL values are considered 179 ** distinct when determining whether or not two entries are the same 180 ** in a UNIQUE index. This is the way PostgreSQL, Oracle, DB2, MySQL, 181 ** OCELOT, and Firebird all work. The SQL92 spec explicitly says this 182 ** is the way things are suppose to work. 183 ** 184 ** If the following macro is set to 0, the NULLs are indistinct for 185 ** a UNIQUE index. In this mode, you can only have a single NULL entry 186 ** for a column declared UNIQUE. This is the way Informix and SQL Server 187 ** work. 188 */ 189 #define NULL_DISTINCT_FOR_UNIQUE 1 190 191 /* 192 ** The "file format" number is an integer that is incremented whenever 193 ** the VDBE-level file format changes. The following macros define the 194 ** the default file format for new databases and the maximum file format 195 ** that the library can read. 196 */ 197 #define SQLITE_MAX_FILE_FORMAT 4 198 #ifndef SQLITE_DEFAULT_FILE_FORMAT 199 # define SQLITE_DEFAULT_FILE_FORMAT 1 200 #endif 201 202 /* 203 ** Provide a default value for TEMP_STORE in case it is not specified 204 ** on the command-line 205 */ 206 #ifndef TEMP_STORE 207 # define TEMP_STORE 1 208 #endif 209 210 /* 211 ** GCC does not define the offsetof() macro so we'll have to do it 212 ** ourselves. 213 */ 214 #ifndef offsetof 215 #define offsetof(STRUCTURE,FIELD) ((int)((char*)&((STRUCTURE*)0)->FIELD)) 216 #endif 217 218 /* 219 ** Check to see if this machine uses EBCDIC. (Yes, believe it or 220 ** not, there are still machines out there that use EBCDIC.) 221 */ 222 #if 'A' == '\301' 223 # define SQLITE_EBCDIC 1 224 #else 225 # define SQLITE_ASCII 1 226 #endif 227 228 /* 229 ** Integers of known sizes. These typedefs might change for architectures 230 ** where the sizes very. Preprocessor macros are available so that the 231 ** types can be conveniently redefined at compile-type. Like this: 232 ** 233 ** cc '-DUINTPTR_TYPE=long long int' ... 234 */ 235 #ifndef UINT32_TYPE 236 # define UINT32_TYPE unsigned int 237 #endif 238 #ifndef UINT16_TYPE 239 # define UINT16_TYPE unsigned short int 240 #endif 241 #ifndef INT16_TYPE 242 # define INT16_TYPE short int 243 #endif 244 #ifndef UINT8_TYPE 245 # define UINT8_TYPE unsigned char 246 #endif 247 #ifndef INT8_TYPE 248 # define INT8_TYPE signed char 249 #endif 250 #ifndef LONGDOUBLE_TYPE 251 # define LONGDOUBLE_TYPE long double 252 #endif 253 typedef sqlite_int64 i64; /* 8-byte signed integer */ 254 typedef sqlite_uint64 u64; /* 8-byte unsigned integer */ 255 typedef UINT32_TYPE u32; /* 4-byte unsigned integer */ 256 typedef UINT16_TYPE u16; /* 2-byte unsigned integer */ 257 typedef INT16_TYPE i16; /* 2-byte signed integer */ 258 typedef UINT8_TYPE u8; /* 1-byte unsigned integer */ 259 typedef UINT8_TYPE i8; /* 1-byte signed integer */ 260 261 /* 262 ** Macros to determine whether the machine is big or little endian, 263 ** evaluated at runtime. 264 */ 265 #ifdef SQLITE_AMALGAMATION 266 const int sqlite3One; 267 #else 268 extern const int sqlite3one; 269 #endif 270 #if defined(i386) || defined(__i386__) || defined(_M_IX86) 271 # define SQLITE_BIGENDIAN 0 272 # define SQLITE_LITTLEENDIAN 1 273 # define SQLITE_UTF16NATIVE SQLITE_UTF16LE 274 #else 275 # define SQLITE_BIGENDIAN (*(char *)(&sqlite3one)==0) 276 # define SQLITE_LITTLEENDIAN (*(char *)(&sqlite3one)==1) 277 # define SQLITE_UTF16NATIVE (SQLITE_BIGENDIAN?SQLITE_UTF16BE:SQLITE_UTF16LE) 278 #endif 279 280 /* 281 ** An instance of the following structure is used to store the busy-handler 282 ** callback for a given sqlite handle. 283 ** 284 ** The sqlite.busyHandler member of the sqlite struct contains the busy 285 ** callback for the database handle. Each pager opened via the sqlite 286 ** handle is passed a pointer to sqlite.busyHandler. The busy-handler 287 ** callback is currently invoked only from within pager.c. 288 */ 289 typedef struct BusyHandler BusyHandler; 290 struct BusyHandler { 291 int (*xFunc)(void *,int); /* The busy callback */ 292 void *pArg; /* First arg to busy callback */ 293 int nBusy; /* Incremented with each busy call */ 294 }; 295 296 /* 297 ** Defer sourcing vdbe.h and btree.h until after the "u8" and 298 ** "BusyHandler typedefs. 299 */ 300 #include "btree.h" 301 #include "vdbe.h" 302 #include "pager.h" 303 304 305 /* 306 ** Name of the master database table. The master database table 307 ** is a special table that holds the names and attributes of all 308 ** user tables and indices. 309 */ 310 #define MASTER_NAME "sqlite_master" 311 #define TEMP_MASTER_NAME "sqlite_temp_master" 312 313 /* 314 ** The root-page of the master database table. 315 */ 316 #define MASTER_ROOT 1 317 318 /* 319 ** The name of the schema table. 320 */ 321 #define SCHEMA_TABLE(x) ((!OMIT_TEMPDB)&&(x==1)?TEMP_MASTER_NAME:MASTER_NAME) 322 323 /* 324 ** A convenience macro that returns the number of elements in 325 ** an array. 326 */ 327 #define ArraySize(X) (sizeof(X)/sizeof(X[0])) 328 329 /* 330 ** Forward references to structures 331 */ 332 typedef struct AggInfo AggInfo; 333 typedef struct AuthContext AuthContext; 334 typedef struct CollSeq CollSeq; 335 typedef struct Column Column; 336 typedef struct Db Db; 337 typedef struct Schema Schema; 338 typedef struct Expr Expr; 339 typedef struct ExprList ExprList; 340 typedef struct FKey FKey; 341 typedef struct FuncDef FuncDef; 342 typedef struct IdList IdList; 343 typedef struct Index Index; 344 typedef struct KeyClass KeyClass; 345 typedef struct KeyInfo KeyInfo; 346 typedef struct Module Module; 347 typedef struct NameContext NameContext; 348 typedef struct Parse Parse; 349 typedef struct Select Select; 350 typedef struct SrcList SrcList; 351 typedef struct Table Table; 352 typedef struct TableLock TableLock; 353 typedef struct Token Token; 354 typedef struct TriggerStack TriggerStack; 355 typedef struct TriggerStep TriggerStep; 356 typedef struct Trigger Trigger; 357 typedef struct WhereInfo WhereInfo; 358 typedef struct WhereLevel WhereLevel; 359 360 #include "os.h" 361 #include "mutex.h" 362 363 /* 364 ** Each database file to be accessed by the system is an instance 365 ** of the following structure. There are normally two of these structures 366 ** in the sqlite.aDb[] array. aDb[0] is the main database file and 367 ** aDb[1] is the database file used to hold temporary tables. Additional 368 ** databases may be attached. 369 */ 370 struct Db { 371 char *zName; /* Name of this database */ 372 Btree *pBt; /* The B*Tree structure for this database file */ 373 u8 inTrans; /* 0: not writable. 1: Transaction. 2: Checkpoint */ 374 u8 safety_level; /* How aggressive at synching data to disk */ 375 void *pAux; /* Auxiliary data. Usually NULL */ 376 void (*xFreeAux)(void*); /* Routine to free pAux */ 377 Schema *pSchema; /* Pointer to database schema (possibly shared) */ 378 }; 379 380 /* 381 ** An instance of the following structure stores a database schema. 382 ** 383 ** If there are no virtual tables configured in this schema, the 384 ** Schema.db variable is set to NULL. After the first virtual table 385 ** has been added, it is set to point to the database connection 386 ** used to create the connection. Once a virtual table has been 387 ** added to the Schema structure and the Schema.db variable populated, 388 ** only that database connection may use the Schema to prepare 389 ** statements. 390 */ 391 struct Schema { 392 int schema_cookie; /* Database schema version number for this file */ 393 Hash tblHash; /* All tables indexed by name */ 394 Hash idxHash; /* All (named) indices indexed by name */ 395 Hash trigHash; /* All triggers indexed by name */ 396 Hash aFKey; /* Foreign keys indexed by to-table */ 397 Table *pSeqTab; /* The sqlite_sequence table used by AUTOINCREMENT */ 398 u8 file_format; /* Schema format version for this file */ 399 u8 enc; /* Text encoding used by this database */ 400 u16 flags; /* Flags associated with this schema */ 401 int cache_size; /* Number of pages to use in the cache */ 402 #ifndef SQLITE_OMIT_VIRTUALTABLE 403 sqlite3 *db; /* "Owner" connection. See comment above */ 404 #endif 405 }; 406 407 /* 408 ** These macros can be used to test, set, or clear bits in the 409 ** Db.flags field. 410 */ 411 #define DbHasProperty(D,I,P) (((D)->aDb[I].pSchema->flags&(P))==(P)) 412 #define DbHasAnyProperty(D,I,P) (((D)->aDb[I].pSchema->flags&(P))!=0) 413 #define DbSetProperty(D,I,P) (D)->aDb[I].pSchema->flags|=(P) 414 #define DbClearProperty(D,I,P) (D)->aDb[I].pSchema->flags&=~(P) 415 416 /* 417 ** Allowed values for the DB.flags field. 418 ** 419 ** The DB_SchemaLoaded flag is set after the database schema has been 420 ** read into internal hash tables. 421 ** 422 ** DB_UnresetViews means that one or more views have column names that 423 ** have been filled out. If the schema changes, these column names might 424 ** changes and so the view will need to be reset. 425 */ 426 #define DB_SchemaLoaded 0x0001 /* The schema has been loaded */ 427 #define DB_UnresetViews 0x0002 /* Some views have defined column names */ 428 #define DB_Empty 0x0004 /* The file is empty (length 0 bytes) */ 429 430 431 /* 432 ** Each database is an instance of the following structure. 433 ** 434 ** The sqlite.lastRowid records the last insert rowid generated by an 435 ** insert statement. Inserts on views do not affect its value. Each 436 ** trigger has its own context, so that lastRowid can be updated inside 437 ** triggers as usual. The previous value will be restored once the trigger 438 ** exits. Upon entering a before or instead of trigger, lastRowid is no 439 ** longer (since after version 2.8.12) reset to -1. 440 ** 441 ** The sqlite.nChange does not count changes within triggers and keeps no 442 ** context. It is reset at start of sqlite3_exec. 443 ** The sqlite.lsChange represents the number of changes made by the last 444 ** insert, update, or delete statement. It remains constant throughout the 445 ** length of a statement and is then updated by OP_SetCounts. It keeps a 446 ** context stack just like lastRowid so that the count of changes 447 ** within a trigger is not seen outside the trigger. Changes to views do not 448 ** affect the value of lsChange. 449 ** The sqlite.csChange keeps track of the number of current changes (since 450 ** the last statement) and is used to update sqlite_lsChange. 451 ** 452 ** The member variables sqlite.errCode, sqlite.zErrMsg and sqlite.zErrMsg16 453 ** store the most recent error code and, if applicable, string. The 454 ** internal function sqlite3Error() is used to set these variables 455 ** consistently. 456 */ 457 struct sqlite3 { 458 sqlite3_vfs *pVfs; /* OS Interface */ 459 int nDb; /* Number of backends currently in use */ 460 Db *aDb; /* All backends */ 461 int flags; /* Miscellanous flags. See below */ 462 int openFlags; /* Flags passed to sqlite3_vfs.xOpen() */ 463 int errCode; /* Most recent error code (SQLITE_*) */ 464 int errMask; /* & result codes with this before returning */ 465 u8 autoCommit; /* The auto-commit flag. */ 466 u8 temp_store; /* 1: file 2: memory 0: default */ 467 u8 mallocFailed; /* True if we have seen a malloc failure */ 468 int nTable; /* Number of tables in the database */ 469 CollSeq *pDfltColl; /* The default collating sequence (BINARY) */ 470 i64 lastRowid; /* ROWID of most recent insert (see above) */ 471 i64 priorNewRowid; /* Last randomly generated ROWID */ 472 int magic; /* Magic number for detect library misuse */ 473 int nChange; /* Value returned by sqlite3_changes() */ 474 int nTotalChange; /* Value returned by sqlite3_total_changes() */ 475 sqlite3_mutex *mutex; /* Connection mutex */ 476 struct sqlite3InitInfo { /* Information used during initialization */ 477 int iDb; /* When back is being initialized */ 478 int newTnum; /* Rootpage of table being initialized */ 479 u8 busy; /* TRUE if currently initializing */ 480 } init; 481 int nExtension; /* Number of loaded extensions */ 482 void **aExtension; /* Array of shared libraray handles */ 483 struct Vdbe *pVdbe; /* List of active virtual machines */ 484 int activeVdbeCnt; /* Number of vdbes currently executing */ 485 void (*xTrace)(void*,const char*); /* Trace function */ 486 void *pTraceArg; /* Argument to the trace function */ 487 void (*xProfile)(void*,const char*,u64); /* Profiling function */ 488 void *pProfileArg; /* Argument to profile function */ 489 void *pCommitArg; /* Argument to xCommitCallback() */ 490 int (*xCommitCallback)(void*); /* Invoked at every commit. */ 491 void *pRollbackArg; /* Argument to xRollbackCallback() */ 492 void (*xRollbackCallback)(void*); /* Invoked at every commit. */ 493 void *pUpdateArg; 494 void (*xUpdateCallback)(void*,int, const char*,const char*,sqlite_int64); 495 void(*xCollNeeded)(void*,sqlite3*,int eTextRep,const char*); 496 void(*xCollNeeded16)(void*,sqlite3*,int eTextRep,const void*); 497 void *pCollNeededArg; 498 sqlite3_value *pErr; /* Most recent error message */ 499 char *zErrMsg; /* Most recent error message (UTF-8 encoded) */ 500 char *zErrMsg16; /* Most recent error message (UTF-16 encoded) */ 501 union { 502 int isInterrupted; /* True if sqlite3_interrupt has been called */ 503 double notUsed1; /* Spacer */ 504 } u1; 505 #ifndef SQLITE_OMIT_AUTHORIZATION 506 int (*xAuth)(void*,int,const char*,const char*,const char*,const char*); 507 /* Access authorization function */ 508 void *pAuthArg; /* 1st argument to the access auth function */ 509 #endif 510 #ifndef SQLITE_OMIT_PROGRESS_CALLBACK 511 int (*xProgress)(void *); /* The progress callback */ 512 void *pProgressArg; /* Argument to the progress callback */ 513 int nProgressOps; /* Number of opcodes for progress callback */ 514 #endif 515 #ifndef SQLITE_OMIT_VIRTUALTABLE 516 Hash aModule; /* populated by sqlite3_create_module() */ 517 Table *pVTab; /* vtab with active Connect/Create method */ 518 sqlite3_vtab **aVTrans; /* Virtual tables with open transactions */ 519 int nVTrans; /* Allocated size of aVTrans */ 520 #endif 521 Hash aFunc; /* All functions that can be in SQL exprs */ 522 Hash aCollSeq; /* All collating sequences */ 523 BusyHandler busyHandler; /* Busy callback */ 524 int busyTimeout; /* Busy handler timeout, in msec */ 525 Db aDbStatic[2]; /* Static space for the 2 default backends */ 526 #ifdef SQLITE_SSE 527 sqlite3_stmt *pFetch; /* Used by SSE to fetch stored statements */ 528 #endif 529 u8 dfltLockMode; /* Default locking-mode for attached dbs */ 530 }; 531 532 /* 533 ** A macro to discover the encoding of a database. 534 */ 535 #define ENC(db) ((db)->aDb[0].pSchema->enc) 536 537 /* 538 ** Possible values for the sqlite.flags and or Db.flags fields. 539 ** 540 ** On sqlite.flags, the SQLITE_InTrans value means that we have 541 ** executed a BEGIN. On Db.flags, SQLITE_InTrans means a statement 542 ** transaction is active on that particular database file. 543 */ 544 #define SQLITE_VdbeTrace 0x00000001 /* True to trace VDBE execution */ 545 #define SQLITE_InTrans 0x00000008 /* True if in a transaction */ 546 #define SQLITE_InternChanges 0x00000010 /* Uncommitted Hash table changes */ 547 #define SQLITE_FullColNames 0x00000020 /* Show full column names on SELECT */ 548 #define SQLITE_ShortColNames 0x00000040 /* Show short columns names */ 549 #define SQLITE_CountRows 0x00000080 /* Count rows changed by INSERT, */ 550 /* DELETE, or UPDATE and return */ 551 /* the count using a callback. */ 552 #define SQLITE_NullCallback 0x00000100 /* Invoke the callback once if the */ 553 /* result set is empty */ 554 #define SQLITE_SqlTrace 0x00000200 /* Debug print SQL as it executes */ 555 #define SQLITE_VdbeListing 0x00000400 /* Debug listings of VDBE programs */ 556 #define SQLITE_WriteSchema 0x00000800 /* OK to update SQLITE_MASTER */ 557 #define SQLITE_NoReadlock 0x00001000 /* Readlocks are omitted when 558 ** accessing read-only databases */ 559 #define SQLITE_IgnoreChecks 0x00002000 /* Do not enforce check constraints */ 560 #define SQLITE_ReadUncommitted 0x00004000 /* For shared-cache mode */ 561 #define SQLITE_LegacyFileFmt 0x00008000 /* Create new databases in format 1 */ 562 #define SQLITE_FullFSync 0x00010000 /* Use full fsync on the backend */ 563 #define SQLITE_LoadExtension 0x00020000 /* Enable load_extension */ 564 565 #define SQLITE_RecoveryMode 0x00040000 /* Ignore schema errors */ 566 #define SQLITE_SharedCache 0x00080000 /* Cache sharing is enabled */ 567 #define SQLITE_Vtab 0x00100000 /* There exists a virtual table */ 568 569 /* 570 ** Possible values for the sqlite.magic field. 571 ** The numbers are obtained at random and have no special meaning, other 572 ** than being distinct from one another. 573 */ 574 #define SQLITE_MAGIC_OPEN 0xa029a697 /* Database is open */ 575 #define SQLITE_MAGIC_CLOSED 0x9f3c2d33 /* Database is closed */ 576 #define SQLITE_MAGIC_BUSY 0xf03b7906 /* Database currently in use */ 577 #define SQLITE_MAGIC_ERROR 0xb5357930 /* An SQLITE_MISUSE error occurred */ 578 579 /* 580 ** Each SQL function is defined by an instance of the following 581 ** structure. A pointer to this structure is stored in the sqlite.aFunc 582 ** hash table. When multiple functions have the same name, the hash table 583 ** points to a linked list of these structures. 584 */ 585 struct FuncDef { 586 i16 nArg; /* Number of arguments. -1 means unlimited */ 587 u8 iPrefEnc; /* Preferred text encoding (SQLITE_UTF8, 16LE, 16BE) */ 588 u8 needCollSeq; /* True if sqlite3GetFuncCollSeq() might be called */ 589 u8 flags; /* Some combination of SQLITE_FUNC_* */ 590 void *pUserData; /* User data parameter */ 591 FuncDef *pNext; /* Next function with same name */ 592 void (*xFunc)(sqlite3_context*,int,sqlite3_value**); /* Regular function */ 593 void (*xStep)(sqlite3_context*,int,sqlite3_value**); /* Aggregate step */ 594 void (*xFinalize)(sqlite3_context*); /* Aggregate finializer */ 595 char zName[1]; /* SQL name of the function. MUST BE LAST */ 596 }; 597 598 /* 599 ** Each SQLite module (virtual table definition) is defined by an 600 ** instance of the following structure, stored in the sqlite3.aModule 601 ** hash table. 602 */ 603 struct Module { 604 const sqlite3_module *pModule; /* Callback pointers */ 605 const char *zName; /* Name passed to create_module() */ 606 void *pAux; /* pAux passed to create_module() */ 607 void (*xDestroy)(void *); /* Module destructor function */ 608 }; 609 610 /* 611 ** Possible values for FuncDef.flags 612 */ 613 #define SQLITE_FUNC_LIKE 0x01 /* Candidate for the LIKE optimization */ 614 #define SQLITE_FUNC_CASE 0x02 /* Case-sensitive LIKE-type function */ 615 #define SQLITE_FUNC_EPHEM 0x04 /* Ephermeral. Delete with VDBE */ 616 617 /* 618 ** information about each column of an SQL table is held in an instance 619 ** of this structure. 620 */ 621 struct Column { 622 char *zName; /* Name of this column */ 623 Expr *pDflt; /* Default value of this column */ 624 char *zType; /* Data type for this column */ 625 char *zColl; /* Collating sequence. If NULL, use the default */ 626 u8 notNull; /* True if there is a NOT NULL constraint */ 627 u8 isPrimKey; /* True if this column is part of the PRIMARY KEY */ 628 char affinity; /* One of the SQLITE_AFF_... values */ 629 #ifndef SQLITE_OMIT_VIRTUALTABLE 630 u8 isHidden; /* True if this column is 'hidden' */ 631 #endif 632 }; 633 634 /* 635 ** A "Collating Sequence" is defined by an instance of the following 636 ** structure. Conceptually, a collating sequence consists of a name and 637 ** a comparison routine that defines the order of that sequence. 638 ** 639 ** There may two seperate implementations of the collation function, one 640 ** that processes text in UTF-8 encoding (CollSeq.xCmp) and another that 641 ** processes text encoded in UTF-16 (CollSeq.xCmp16), using the machine 642 ** native byte order. When a collation sequence is invoked, SQLite selects 643 ** the version that will require the least expensive encoding 644 ** translations, if any. 645 ** 646 ** The CollSeq.pUser member variable is an extra parameter that passed in 647 ** as the first argument to the UTF-8 comparison function, xCmp. 648 ** CollSeq.pUser16 is the equivalent for the UTF-16 comparison function, 649 ** xCmp16. 650 ** 651 ** If both CollSeq.xCmp and CollSeq.xCmp16 are NULL, it means that the 652 ** collating sequence is undefined. Indices built on an undefined 653 ** collating sequence may not be read or written. 654 */ 655 struct CollSeq { 656 char *zName; /* Name of the collating sequence, UTF-8 encoded */ 657 u8 enc; /* Text encoding handled by xCmp() */ 658 u8 type; /* One of the SQLITE_COLL_... values below */ 659 void *pUser; /* First argument to xCmp() */ 660 int (*xCmp)(void*,int, const void*, int, const void*); 661 void (*xDel)(void*); /* Destructor for pUser */ 662 }; 663 664 /* 665 ** Allowed values of CollSeq flags: 666 */ 667 #define SQLITE_COLL_BINARY 1 /* The default memcmp() collating sequence */ 668 #define SQLITE_COLL_NOCASE 2 /* The built-in NOCASE collating sequence */ 669 #define SQLITE_COLL_REVERSE 3 /* The built-in REVERSE collating sequence */ 670 #define SQLITE_COLL_USER 0 /* Any other user-defined collating sequence */ 671 672 /* 673 ** A sort order can be either ASC or DESC. 674 */ 675 #define SQLITE_SO_ASC 0 /* Sort in ascending order */ 676 #define SQLITE_SO_DESC 1 /* Sort in ascending order */ 677 678 /* 679 ** Column affinity types. 680 ** 681 ** These used to have mnemonic name like 'i' for SQLITE_AFF_INTEGER and 682 ** 't' for SQLITE_AFF_TEXT. But we can save a little space and improve 683 ** the speed a little by number the values consecutively. 684 ** 685 ** But rather than start with 0 or 1, we begin with 'a'. That way, 686 ** when multiple affinity types are concatenated into a string and 687 ** used as the P3 operand, they will be more readable. 688 ** 689 ** Note also that the numeric types are grouped together so that testing 690 ** for a numeric type is a single comparison. 691 */ 692 #define SQLITE_AFF_TEXT 'a' 693 #define SQLITE_AFF_NONE 'b' 694 #define SQLITE_AFF_NUMERIC 'c' 695 #define SQLITE_AFF_INTEGER 'd' 696 #define SQLITE_AFF_REAL 'e' 697 698 #define sqlite3IsNumericAffinity(X) ((X)>=SQLITE_AFF_NUMERIC) 699 700 /* 701 ** Each SQL table is represented in memory by an instance of the 702 ** following structure. 703 ** 704 ** Table.zName is the name of the table. The case of the original 705 ** CREATE TABLE statement is stored, but case is not significant for 706 ** comparisons. 707 ** 708 ** Table.nCol is the number of columns in this table. Table.aCol is a 709 ** pointer to an array of Column structures, one for each column. 710 ** 711 ** If the table has an INTEGER PRIMARY KEY, then Table.iPKey is the index of 712 ** the column that is that key. Otherwise Table.iPKey is negative. Note 713 ** that the datatype of the PRIMARY KEY must be INTEGER for this field to 714 ** be set. An INTEGER PRIMARY KEY is used as the rowid for each row of 715 ** the table. If a table has no INTEGER PRIMARY KEY, then a random rowid 716 ** is generated for each row of the table. Table.hasPrimKey is true if 717 ** the table has any PRIMARY KEY, INTEGER or otherwise. 718 ** 719 ** Table.tnum is the page number for the root BTree page of the table in the 720 ** database file. If Table.iDb is the index of the database table backend 721 ** in sqlite.aDb[]. 0 is for the main database and 1 is for the file that 722 ** holds temporary tables and indices. If Table.isEphem 723 ** is true, then the table is stored in a file that is automatically deleted 724 ** when the VDBE cursor to the table is closed. In this case Table.tnum 725 ** refers VDBE cursor number that holds the table open, not to the root 726 ** page number. Transient tables are used to hold the results of a 727 ** sub-query that appears instead of a real table name in the FROM clause 728 ** of a SELECT statement. 729 */ 730 struct Table { 731 char *zName; /* Name of the table */ 732 int nCol; /* Number of columns in this table */ 733 Column *aCol; /* Information about each column */ 734 int iPKey; /* If not less then 0, use aCol[iPKey] as the primary key */ 735 Index *pIndex; /* List of SQL indexes on this table. */ 736 int tnum; /* Root BTree node for this table (see note above) */ 737 Select *pSelect; /* NULL for tables. Points to definition if a view. */ 738 int nRef; /* Number of pointers to this Table */ 739 Trigger *pTrigger; /* List of SQL triggers on this table */ 740 FKey *pFKey; /* Linked list of all foreign keys in this table */ 741 char *zColAff; /* String defining the affinity of each column */ 742 #ifndef SQLITE_OMIT_CHECK 743 Expr *pCheck; /* The AND of all CHECK constraints */ 744 #endif 745 #ifndef SQLITE_OMIT_ALTERTABLE 746 int addColOffset; /* Offset in CREATE TABLE statement to add a new column */ 747 #endif 748 u8 readOnly; /* True if this table should not be written by the user */ 749 u8 isEphem; /* True if created using OP_OpenEphermeral */ 750 u8 hasPrimKey; /* True if there exists a primary key */ 751 u8 keyConf; /* What to do in case of uniqueness conflict on iPKey */ 752 u8 autoInc; /* True if the integer primary key is autoincrement */ 753 #ifndef SQLITE_OMIT_VIRTUALTABLE 754 u8 isVirtual; /* True if this is a virtual table */ 755 u8 isCommit; /* True once the CREATE TABLE has been committed */ 756 Module *pMod; /* Pointer to the implementation of the module */ 757 sqlite3_vtab *pVtab; /* Pointer to the module instance */ 758 int nModuleArg; /* Number of arguments to the module */ 759 char **azModuleArg; /* Text of all module args. [0] is module name */ 760 #endif 761 Schema *pSchema; /* Schema that contains this table */ 762 }; 763 764 /* 765 ** Test to see whether or not a table is a virtual table. This is 766 ** done as a macro so that it will be optimized out when virtual 767 ** table support is omitted from the build. 768 */ 769 #ifndef SQLITE_OMIT_VIRTUALTABLE 770 # define IsVirtual(X) ((X)->isVirtual) 771 # define IsHiddenColumn(X) ((X)->isHidden) 772 #else 773 # define IsVirtual(X) 0 774 # define IsHiddenColumn(X) 0 775 #endif 776 777 /* 778 ** Each foreign key constraint is an instance of the following structure. 779 ** 780 ** A foreign key is associated with two tables. The "from" table is 781 ** the table that contains the REFERENCES clause that creates the foreign 782 ** key. The "to" table is the table that is named in the REFERENCES clause. 783 ** Consider this example: 784 ** 785 ** CREATE TABLE ex1( 786 ** a INTEGER PRIMARY KEY, 787 ** b INTEGER CONSTRAINT fk1 REFERENCES ex2(x) 788 ** ); 789 ** 790 ** For foreign key "fk1", the from-table is "ex1" and the to-table is "ex2". 791 ** 792 ** Each REFERENCES clause generates an instance of the following structure 793 ** which is attached to the from-table. The to-table need not exist when 794 ** the from-table is created. The existance of the to-table is not checked 795 ** until an attempt is made to insert data into the from-table. 796 ** 797 ** The sqlite.aFKey hash table stores pointers to this structure 798 ** given the name of a to-table. For each to-table, all foreign keys 799 ** associated with that table are on a linked list using the FKey.pNextTo 800 ** field. 801 */ 802 struct FKey { 803 Table *pFrom; /* The table that constains the REFERENCES clause */ 804 FKey *pNextFrom; /* Next foreign key in pFrom */ 805 char *zTo; /* Name of table that the key points to */ 806 FKey *pNextTo; /* Next foreign key that points to zTo */ 807 int nCol; /* Number of columns in this key */ 808 struct sColMap { /* Mapping of columns in pFrom to columns in zTo */ 809 int iFrom; /* Index of column in pFrom */ 810 char *zCol; /* Name of column in zTo. If 0 use PRIMARY KEY */ 811 } *aCol; /* One entry for each of nCol column s */ 812 u8 isDeferred; /* True if constraint checking is deferred till COMMIT */ 813 u8 updateConf; /* How to resolve conflicts that occur on UPDATE */ 814 u8 deleteConf; /* How to resolve conflicts that occur on DELETE */ 815 u8 insertConf; /* How to resolve conflicts that occur on INSERT */ 816 }; 817 818 /* 819 ** SQLite supports many different ways to resolve a constraint 820 ** error. ROLLBACK processing means that a constraint violation 821 ** causes the operation in process to fail and for the current transaction 822 ** to be rolled back. ABORT processing means the operation in process 823 ** fails and any prior changes from that one operation are backed out, 824 ** but the transaction is not rolled back. FAIL processing means that 825 ** the operation in progress stops and returns an error code. But prior 826 ** changes due to the same operation are not backed out and no rollback 827 ** occurs. IGNORE means that the particular row that caused the constraint 828 ** error is not inserted or updated. Processing continues and no error 829 ** is returned. REPLACE means that preexisting database rows that caused 830 ** a UNIQUE constraint violation are removed so that the new insert or 831 ** update can proceed. Processing continues and no error is reported. 832 ** 833 ** RESTRICT, SETNULL, and CASCADE actions apply only to foreign keys. 834 ** RESTRICT is the same as ABORT for IMMEDIATE foreign keys and the 835 ** same as ROLLBACK for DEFERRED keys. SETNULL means that the foreign 836 ** key is set to NULL. CASCADE means that a DELETE or UPDATE of the 837 ** referenced table row is propagated into the row that holds the 838 ** foreign key. 839 ** 840 ** The following symbolic values are used to record which type 841 ** of action to take. 842 */ 843 #define OE_None 0 /* There is no constraint to check */ 844 #define OE_Rollback 1 /* Fail the operation and rollback the transaction */ 845 #define OE_Abort 2 /* Back out changes but do no rollback transaction */ 846 #define OE_Fail 3 /* Stop the operation but leave all prior changes */ 847 #define OE_Ignore 4 /* Ignore the error. Do not do the INSERT or UPDATE */ 848 #define OE_Replace 5 /* Delete existing record, then do INSERT or UPDATE */ 849 850 #define OE_Restrict 6 /* OE_Abort for IMMEDIATE, OE_Rollback for DEFERRED */ 851 #define OE_SetNull 7 /* Set the foreign key value to NULL */ 852 #define OE_SetDflt 8 /* Set the foreign key value to its default */ 853 #define OE_Cascade 9 /* Cascade the changes */ 854 855 #define OE_Default 99 /* Do whatever the default action is */ 856 857 858 /* 859 ** An instance of the following structure is passed as the first 860 ** argument to sqlite3VdbeKeyCompare and is used to control the 861 ** comparison of the two index keys. 862 ** 863 ** If the KeyInfo.incrKey value is true and the comparison would 864 ** otherwise be equal, then return a result as if the second key 865 ** were larger. 866 */ 867 struct KeyInfo { 868 sqlite3 *db; /* The database connection */ 869 u8 enc; /* Text encoding - one of the TEXT_Utf* values */ 870 u8 incrKey; /* Increase 2nd key by epsilon before comparison */ 871 int nField; /* Number of entries in aColl[] */ 872 u8 *aSortOrder; /* If defined an aSortOrder[i] is true, sort DESC */ 873 CollSeq *aColl[1]; /* Collating sequence for each term of the key */ 874 }; 875 876 /* 877 ** Each SQL index is represented in memory by an 878 ** instance of the following structure. 879 ** 880 ** The columns of the table that are to be indexed are described 881 ** by the aiColumn[] field of this structure. For example, suppose 882 ** we have the following table and index: 883 ** 884 ** CREATE TABLE Ex1(c1 int, c2 int, c3 text); 885 ** CREATE INDEX Ex2 ON Ex1(c3,c1); 886 ** 887 ** In the Table structure describing Ex1, nCol==3 because there are 888 ** three columns in the table. In the Index structure describing 889 ** Ex2, nColumn==2 since 2 of the 3 columns of Ex1 are indexed. 890 ** The value of aiColumn is {2, 0}. aiColumn[0]==2 because the 891 ** first column to be indexed (c3) has an index of 2 in Ex1.aCol[]. 892 ** The second column to be indexed (c1) has an index of 0 in 893 ** Ex1.aCol[], hence Ex2.aiColumn[1]==0. 894 ** 895 ** The Index.onError field determines whether or not the indexed columns 896 ** must be unique and what to do if they are not. When Index.onError=OE_None, 897 ** it means this is not a unique index. Otherwise it is a unique index 898 ** and the value of Index.onError indicate the which conflict resolution 899 ** algorithm to employ whenever an attempt is made to insert a non-unique 900 ** element. 901 */ 902 struct Index { 903 char *zName; /* Name of this index */ 904 int nColumn; /* Number of columns in the table used by this index */ 905 int *aiColumn; /* Which columns are used by this index. 1st is 0 */ 906 unsigned *aiRowEst; /* Result of ANALYZE: Est. rows selected by each column */ 907 Table *pTable; /* The SQL table being indexed */ 908 int tnum; /* Page containing root of this index in database file */ 909 u8 onError; /* OE_Abort, OE_Ignore, OE_Replace, or OE_None */ 910 u8 autoIndex; /* True if is automatically created (ex: by UNIQUE) */ 911 char *zColAff; /* String defining the affinity of each column */ 912 Index *pNext; /* The next index associated with the same table */ 913 Schema *pSchema; /* Schema containing this index */ 914 u8 *aSortOrder; /* Array of size Index.nColumn. True==DESC, False==ASC */ 915 char **azColl; /* Array of collation sequence names for index */ 916 }; 917 918 /* 919 ** Each token coming out of the lexer is an instance of 920 ** this structure. Tokens are also used as part of an expression. 921 ** 922 ** Note if Token.z==0 then Token.dyn and Token.n are undefined and 923 ** may contain random values. Do not make any assuptions about Token.dyn 924 ** and Token.n when Token.z==0. 925 */ 926 struct Token { 927 const unsigned char *z; /* Text of the token. Not NULL-terminated! */ 928 unsigned dyn : 1; /* True for malloced memory, false for static */ 929 unsigned n : 31; /* Number of characters in this token */ 930 }; 931 932 /* 933 ** An instance of this structure contains information needed to generate 934 ** code for a SELECT that contains aggregate functions. 935 ** 936 ** If Expr.op==TK_AGG_COLUMN or TK_AGG_FUNCTION then Expr.pAggInfo is a 937 ** pointer to this structure. The Expr.iColumn field is the index in 938 ** AggInfo.aCol[] or AggInfo.aFunc[] of information needed to generate 939 ** code for that node. 940 ** 941 ** AggInfo.pGroupBy and AggInfo.aFunc.pExpr point to fields within the 942 ** original Select structure that describes the SELECT statement. These 943 ** fields do not need to be freed when deallocating the AggInfo structure. 944 */ 945 struct AggInfo { 946 u8 directMode; /* Direct rendering mode means take data directly 947 ** from source tables rather than from accumulators */ 948 u8 useSortingIdx; /* In direct mode, reference the sorting index rather 949 ** than the source table */ 950 int sortingIdx; /* Cursor number of the sorting index */ 951 ExprList *pGroupBy; /* The group by clause */ 952 int nSortingColumn; /* Number of columns in the sorting index */ 953 struct AggInfo_col { /* For each column used in source tables */ 954 Table *pTab; /* Source table */ 955 int iTable; /* Cursor number of the source table */ 956 int iColumn; /* Column number within the source table */ 957 int iSorterColumn; /* Column number in the sorting index */ 958 int iMem; /* Memory location that acts as accumulator */ 959 Expr *pExpr; /* The original expression */ 960 } *aCol; 961 int nColumn; /* Number of used entries in aCol[] */ 962 int nColumnAlloc; /* Number of slots allocated for aCol[] */ 963 int nAccumulator; /* Number of columns that show through to the output. 964 ** Additional columns are used only as parameters to 965 ** aggregate functions */ 966 struct AggInfo_func { /* For each aggregate function */ 967 Expr *pExpr; /* Expression encoding the function */ 968 FuncDef *pFunc; /* The aggregate function implementation */ 969 int iMem; /* Memory location that acts as accumulator */ 970 int iDistinct; /* Ephermeral table used to enforce DISTINCT */ 971 } *aFunc; 972 int nFunc; /* Number of entries in aFunc[] */ 973 int nFuncAlloc; /* Number of slots allocated for aFunc[] */ 974 }; 975 976 /* 977 ** Each node of an expression in the parse tree is an instance 978 ** of this structure. 979 ** 980 ** Expr.op is the opcode. The integer parser token codes are reused 981 ** as opcodes here. For example, the parser defines TK_GE to be an integer 982 ** code representing the ">=" operator. This same integer code is reused 983 ** to represent the greater-than-or-equal-to operator in the expression 984 ** tree. 985 ** 986 ** Expr.pRight and Expr.pLeft are subexpressions. Expr.pList is a list 987 ** of argument if the expression is a function. 988 ** 989 ** Expr.token is the operator token for this node. For some expressions 990 ** that have subexpressions, Expr.token can be the complete text that gave 991 ** rise to the Expr. In the latter case, the token is marked as being 992 ** a compound token. 993 ** 994 ** An expression of the form ID or ID.ID refers to a column in a table. 995 ** For such expressions, Expr.op is set to TK_COLUMN and Expr.iTable is 996 ** the integer cursor number of a VDBE cursor pointing to that table and 997 ** Expr.iColumn is the column number for the specific column. If the 998 ** expression is used as a result in an aggregate SELECT, then the 999 ** value is also stored in the Expr.iAgg column in the aggregate so that 1000 ** it can be accessed after all aggregates are computed. 1001 ** 1002 ** If the expression is a function, the Expr.iTable is an integer code 1003 ** representing which function. If the expression is an unbound variable 1004 ** marker (a question mark character '?' in the original SQL) then the 1005 ** Expr.iTable holds the index number for that variable. 1006 ** 1007 ** If the expression is a subquery then Expr.iColumn holds an integer 1008 ** register number containing the result of the subquery. If the 1009 ** subquery gives a constant result, then iTable is -1. If the subquery 1010 ** gives a different answer at different times during statement processing 1011 ** then iTable is the address of a subroutine that computes the subquery. 1012 ** 1013 ** The Expr.pSelect field points to a SELECT statement. The SELECT might 1014 ** be the right operand of an IN operator. Or, if a scalar SELECT appears 1015 ** in an expression the opcode is TK_SELECT and Expr.pSelect is the only 1016 ** operand. 1017 ** 1018 ** If the Expr is of type OP_Column, and the table it is selecting from 1019 ** is a disk table or the "old.*" pseudo-table, then pTab points to the 1020 ** corresponding table definition. 1021 */ 1022 struct Expr { 1023 u8 op; /* Operation performed by this node */ 1024 char affinity; /* The affinity of the column or 0 if not a column */ 1025 u16 flags; /* Various flags. See below */ 1026 CollSeq *pColl; /* The collation type of the column or 0 */ 1027 Expr *pLeft, *pRight; /* Left and right subnodes */ 1028 ExprList *pList; /* A list of expressions used as function arguments 1029 ** or in "<expr> IN (<expr-list)" */ 1030 Token token; /* An operand token */ 1031 Token span; /* Complete text of the expression */ 1032 int iTable, iColumn; /* When op==TK_COLUMN, then this expr node means the 1033 ** iColumn-th field of the iTable-th table. */ 1034 AggInfo *pAggInfo; /* Used by TK_AGG_COLUMN and TK_AGG_FUNCTION */ 1035 int iAgg; /* Which entry in pAggInfo->aCol[] or ->aFunc[] */ 1036 int iRightJoinTable; /* If EP_FromJoin, the right table of the join */ 1037 Select *pSelect; /* When the expression is a sub-select. Also the 1038 ** right side of "<expr> IN (<select>)" */ 1039 Table *pTab; /* Table for OP_Column expressions. */ 1040 /* Schema *pSchema; */ 1041 #if defined(SQLITE_TEST) || SQLITE_MAX_EXPR_DEPTH>0 1042 int nHeight; /* Height of the tree headed by this node */ 1043 #endif 1044 }; 1045 1046 /* 1047 ** The following are the meanings of bits in the Expr.flags field. 1048 */ 1049 #define EP_FromJoin 0x01 /* Originated in ON or USING clause of a join */ 1050 #define EP_Agg 0x02 /* Contains one or more aggregate functions */ 1051 #define EP_Resolved 0x04 /* IDs have been resolved to COLUMNs */ 1052 #define EP_Error 0x08 /* Expression contains one or more errors */ 1053 #define EP_Distinct 0x10 /* Aggregate function with DISTINCT keyword */ 1054 #define EP_VarSelect 0x20 /* pSelect is correlated, not constant */ 1055 #define EP_Dequoted 0x40 /* True if the string has been dequoted */ 1056 #define EP_InfixFunc 0x80 /* True for an infix function: LIKE, GLOB, etc */ 1057 #define EP_ExpCollate 0x100 /* Collating sequence specified explicitly */ 1058 1059 /* 1060 ** These macros can be used to test, set, or clear bits in the 1061 ** Expr.flags field. 1062 */ 1063 #define ExprHasProperty(E,P) (((E)->flags&(P))==(P)) 1064 #define ExprHasAnyProperty(E,P) (((E)->flags&(P))!=0) 1065 #define ExprSetProperty(E,P) (E)->flags|=(P) 1066 #define ExprClearProperty(E,P) (E)->flags&=~(P) 1067 1068 /* 1069 ** A list of expressions. Each expression may optionally have a 1070 ** name. An expr/name combination can be used in several ways, such 1071 ** as the list of "expr AS ID" fields following a "SELECT" or in the 1072 ** list of "ID = expr" items in an UPDATE. A list of expressions can 1073 ** also be used as the argument to a function, in which case the a.zName 1074 ** field is not used. 1075 */ 1076 struct ExprList { 1077 int nExpr; /* Number of expressions on the list */ 1078 int nAlloc; /* Number of entries allocated below */ 1079 int iECursor; /* VDBE Cursor associated with this ExprList */ 1080 struct ExprList_item { 1081 Expr *pExpr; /* The list of expressions */ 1082 char *zName; /* Token associated with this expression */ 1083 u8 sortOrder; /* 1 for DESC or 0 for ASC */ 1084 u8 isAgg; /* True if this is an aggregate like count(*) */ 1085 u8 done; /* A flag to indicate when processing is finished */ 1086 } *a; /* One entry for each expression */ 1087 }; 1088 1089 /* 1090 ** An instance of this structure can hold a simple list of identifiers, 1091 ** such as the list "a,b,c" in the following statements: 1092 ** 1093 ** INSERT INTO t(a,b,c) VALUES ...; 1094 ** CREATE INDEX idx ON t(a,b,c); 1095 ** CREATE TRIGGER trig BEFORE UPDATE ON t(a,b,c) ...; 1096 ** 1097 ** The IdList.a.idx field is used when the IdList represents the list of 1098 ** column names after a table name in an INSERT statement. In the statement 1099 ** 1100 ** INSERT INTO t(a,b,c) ... 1101 ** 1102 ** If "a" is the k-th column of table "t", then IdList.a[0].idx==k. 1103 */ 1104 struct IdList { 1105 struct IdList_item { 1106 char *zName; /* Name of the identifier */ 1107 int idx; /* Index in some Table.aCol[] of a column named zName */ 1108 } *a; 1109 int nId; /* Number of identifiers on the list */ 1110 int nAlloc; /* Number of entries allocated for a[] below */ 1111 }; 1112 1113 /* 1114 ** The bitmask datatype defined below is used for various optimizations. 1115 ** 1116 ** Changing this from a 64-bit to a 32-bit type limits the number of 1117 ** tables in a join to 32 instead of 64. But it also reduces the size 1118 ** of the library by 738 bytes on ix86. 1119 */ 1120 typedef u64 Bitmask; 1121 1122 /* 1123 ** The following structure describes the FROM clause of a SELECT statement. 1124 ** Each table or subquery in the FROM clause is a separate element of 1125 ** the SrcList.a[] array. 1126 ** 1127 ** With the addition of multiple database support, the following structure 1128 ** can also be used to describe a particular table such as the table that 1129 ** is modified by an INSERT, DELETE, or UPDATE statement. In standard SQL, 1130 ** such a table must be a simple name: ID. But in SQLite, the table can 1131 ** now be identified by a database name, a dot, then the table name: ID.ID. 1132 ** 1133 ** The jointype starts out showing the join type between the current table 1134 ** and the next table on the list. The parser builds the list this way. 1135 ** But sqlite3SrcListShiftJoinType() later shifts the jointypes so that each 1136 ** jointype expresses the join between the table and the previous table. 1137 */ 1138 struct SrcList { 1139 i16 nSrc; /* Number of tables or subqueries in the FROM clause */ 1140 i16 nAlloc; /* Number of entries allocated in a[] below */ 1141 struct SrcList_item { 1142 char *zDatabase; /* Name of database holding this table */ 1143 char *zName; /* Name of the table */ 1144 char *zAlias; /* The "B" part of a "A AS B" phrase. zName is the "A" */ 1145 Table *pTab; /* An SQL table corresponding to zName */ 1146 Select *pSelect; /* A SELECT statement used in place of a table name */ 1147 u8 isPopulated; /* Temporary table associated with SELECT is populated */ 1148 u8 jointype; /* Type of join between this able and the previous */ 1149 int iCursor; /* The VDBE cursor number used to access this table */ 1150 Expr *pOn; /* The ON clause of a join */ 1151 IdList *pUsing; /* The USING clause of a join */ 1152 Bitmask colUsed; /* Bit N (1<<N) set if column N or pTab is used */ 1153 } a[1]; /* One entry for each identifier on the list */ 1154 }; 1155 1156 /* 1157 ** Permitted values of the SrcList.a.jointype field 1158 */ 1159 #define JT_INNER 0x0001 /* Any kind of inner or cross join */ 1160 #define JT_CROSS 0x0002 /* Explicit use of the CROSS keyword */ 1161 #define JT_NATURAL 0x0004 /* True for a "natural" join */ 1162 #define JT_LEFT 0x0008 /* Left outer join */ 1163 #define JT_RIGHT 0x0010 /* Right outer join */ 1164 #define JT_OUTER 0x0020 /* The "OUTER" keyword is present */ 1165 #define JT_ERROR 0x0040 /* unknown or unsupported join type */ 1166 1167 /* 1168 ** For each nested loop in a WHERE clause implementation, the WhereInfo 1169 ** structure contains a single instance of this structure. This structure 1170 ** is intended to be private the the where.c module and should not be 1171 ** access or modified by other modules. 1172 ** 1173 ** The pIdxInfo and pBestIdx fields are used to help pick the best 1174 ** index on a virtual table. The pIdxInfo pointer contains indexing 1175 ** information for the i-th table in the FROM clause before reordering. 1176 ** All the pIdxInfo pointers are freed by whereInfoFree() in where.c. 1177 ** The pBestIdx pointer is a copy of pIdxInfo for the i-th table after 1178 ** FROM clause ordering. This is a little confusing so I will repeat 1179 ** it in different words. WhereInfo.a[i].pIdxInfo is index information 1180 ** for WhereInfo.pTabList.a[i]. WhereInfo.a[i].pBestInfo is the 1181 ** index information for the i-th loop of the join. pBestInfo is always 1182 ** either NULL or a copy of some pIdxInfo. So for cleanup it is 1183 ** sufficient to free all of the pIdxInfo pointers. 1184 ** 1185 */ 1186 struct WhereLevel { 1187 int iFrom; /* Which entry in the FROM clause */ 1188 int flags; /* Flags associated with this level */ 1189 int iMem; /* First memory cell used by this level */ 1190 int iLeftJoin; /* Memory cell used to implement LEFT OUTER JOIN */ 1191 Index *pIdx; /* Index used. NULL if no index */ 1192 int iTabCur; /* The VDBE cursor used to access the table */ 1193 int iIdxCur; /* The VDBE cursor used to acesss pIdx */ 1194 int brk; /* Jump here to break out of the loop */ 1195 int nxt; /* Jump here to start the next IN combination */ 1196 int cont; /* Jump here to continue with the next loop cycle */ 1197 int top; /* First instruction of interior of the loop */ 1198 int op, p1, p2; /* Opcode used to terminate the loop */ 1199 int nEq; /* Number of == or IN constraints on this loop */ 1200 int nIn; /* Number of IN operators constraining this loop */ 1201 struct InLoop { 1202 int iCur; /* The VDBE cursor used by this IN operator */ 1203 int topAddr; /* Top of the IN loop */ 1204 } *aInLoop; /* Information about each nested IN operator */ 1205 sqlite3_index_info *pBestIdx; /* Index information for this level */ 1206 1207 /* The following field is really not part of the current level. But 1208 ** we need a place to cache index information for each table in the 1209 ** FROM clause and the WhereLevel structure is a convenient place. 1210 */ 1211 sqlite3_index_info *pIdxInfo; /* Index info for n-th source table */ 1212 }; 1213 1214 /* 1215 ** The WHERE clause processing routine has two halves. The 1216 ** first part does the start of the WHERE loop and the second 1217 ** half does the tail of the WHERE loop. An instance of 1218 ** this structure is returned by the first half and passed 1219 ** into the second half to give some continuity. 1220 */ 1221 struct WhereInfo { 1222 Parse *pParse; 1223 SrcList *pTabList; /* List of tables in the join */ 1224 int iTop; /* The very beginning of the WHERE loop */ 1225 int iContinue; /* Jump here to continue with next record */ 1226 int iBreak; /* Jump here to break out of the loop */ 1227 int nLevel; /* Number of nested loop */ 1228 sqlite3_index_info **apInfo; /* Array of pointers to index info structures */ 1229 WhereLevel a[1]; /* Information about each nest loop in the WHERE */ 1230 }; 1231 1232 /* 1233 ** A NameContext defines a context in which to resolve table and column 1234 ** names. The context consists of a list of tables (the pSrcList) field and 1235 ** a list of named expression (pEList). The named expression list may 1236 ** be NULL. The pSrc corresponds to the FROM clause of a SELECT or 1237 ** to the table being operated on by INSERT, UPDATE, or DELETE. The 1238 ** pEList corresponds to the result set of a SELECT and is NULL for 1239 ** other statements. 1240 ** 1241 ** NameContexts can be nested. When resolving names, the inner-most 1242 ** context is searched first. If no match is found, the next outer 1243 ** context is checked. If there is still no match, the next context 1244 ** is checked. This process continues until either a match is found 1245 ** or all contexts are check. When a match is found, the nRef member of 1246 ** the context containing the match is incremented. 1247 ** 1248 ** Each subquery gets a new NameContext. The pNext field points to the 1249 ** NameContext in the parent query. Thus the process of scanning the 1250 ** NameContext list corresponds to searching through successively outer 1251 ** subqueries looking for a match. 1252 */ 1253 struct NameContext { 1254 Parse *pParse; /* The parser */ 1255 SrcList *pSrcList; /* One or more tables used to resolve names */ 1256 ExprList *pEList; /* Optional list of named expressions */ 1257 int nRef; /* Number of names resolved by this context */ 1258 int nErr; /* Number of errors encountered while resolving names */ 1259 u8 allowAgg; /* Aggregate functions allowed here */ 1260 u8 hasAgg; /* True if aggregates are seen */ 1261 u8 isCheck; /* True if resolving names in a CHECK constraint */ 1262 int nDepth; /* Depth of subquery recursion. 1 for no recursion */ 1263 AggInfo *pAggInfo; /* Information about aggregates at this level */ 1264 NameContext *pNext; /* Next outer name context. NULL for outermost */ 1265 }; 1266 1267 /* 1268 ** An instance of the following structure contains all information 1269 ** needed to generate code for a single SELECT statement. 1270 ** 1271 ** nLimit is set to -1 if there is no LIMIT clause. nOffset is set to 0. 1272 ** If there is a LIMIT clause, the parser sets nLimit to the value of the 1273 ** limit and nOffset to the value of the offset (or 0 if there is not 1274 ** offset). But later on, nLimit and nOffset become the memory locations 1275 ** in the VDBE that record the limit and offset counters. 1276 ** 1277 ** addrOpenEphm[] entries contain the address of OP_OpenEphemeral opcodes. 1278 ** These addresses must be stored so that we can go back and fill in 1279 ** the P3_KEYINFO and P2 parameters later. Neither the KeyInfo nor 1280 ** the number of columns in P2 can be computed at the same time 1281 ** as the OP_OpenEphm instruction is coded because not 1282 ** enough information about the compound query is known at that point. 1283 ** The KeyInfo for addrOpenTran[0] and [1] contains collating sequences 1284 ** for the result set. The KeyInfo for addrOpenTran[2] contains collating 1285 ** sequences for the ORDER BY clause. 1286 */ 1287 struct Select { 1288 ExprList *pEList; /* The fields of the result */ 1289 u8 op; /* One of: TK_UNION TK_ALL TK_INTERSECT TK_EXCEPT */ 1290 u8 isDistinct; /* True if the DISTINCT keyword is present */ 1291 u8 isResolved; /* True once sqlite3SelectResolve() has run. */ 1292 u8 isAgg; /* True if this is an aggregate query */ 1293 u8 usesEphm; /* True if uses an OpenEphemeral opcode */ 1294 u8 disallowOrderBy; /* Do not allow an ORDER BY to be attached if TRUE */ 1295 char affinity; /* MakeRecord with this affinity for SRT_Set */ 1296 SrcList *pSrc; /* The FROM clause */ 1297 Expr *pWhere; /* The WHERE clause */ 1298 ExprList *pGroupBy; /* The GROUP BY clause */ 1299 Expr *pHaving; /* The HAVING clause */ 1300 ExprList *pOrderBy; /* The ORDER BY clause */ 1301 Select *pPrior; /* Prior select in a compound select statement */ 1302 Select *pRightmost; /* Right-most select in a compound select statement */ 1303 Expr *pLimit; /* LIMIT expression. NULL means not used. */ 1304 Expr *pOffset; /* OFFSET expression. NULL means not used. */ 1305 int iLimit, iOffset; /* Memory registers holding LIMIT & OFFSET counters */ 1306 int addrOpenEphm[3]; /* OP_OpenEphem opcodes related to this select */ 1307 }; 1308 1309 /* 1310 ** The results of a select can be distributed in several ways. 1311 */ 1312 #define SRT_Union 1 /* Store result as keys in an index */ 1313 #define SRT_Except 2 /* Remove result from a UNION index */ 1314 #define SRT_Discard 3 /* Do not save the results anywhere */ 1315 1316 /* The ORDER BY clause is ignored for all of the above */ 1317 #define IgnorableOrderby(X) (X<=SRT_Discard) 1318 1319 #define SRT_Callback 4 /* Invoke a callback with each row of result */ 1320 #define SRT_Mem 5 /* Store result in a memory cell */ 1321 #define SRT_Set 6 /* Store non-null results as keys in an index */ 1322 #define SRT_Table 7 /* Store result as data with an automatic rowid */ 1323 #define SRT_EphemTab 8 /* Create transient tab and store like SRT_Table */ 1324 #define SRT_Subroutine 9 /* Call a subroutine to handle results */ 1325 #define SRT_Exists 10 /* Store 1 if the result is not empty */ 1326 1327 /* 1328 ** An SQL parser context. A copy of this structure is passed through 1329 ** the parser and down into all the parser action routine in order to 1330 ** carry around information that is global to the entire parse. 1331 ** 1332 ** The structure is divided into two parts. When the parser and code 1333 ** generate call themselves recursively, the first part of the structure 1334 ** is constant but the second part is reset at the beginning and end of 1335 ** each recursion. 1336 ** 1337 ** The nTableLock and aTableLock variables are only used if the shared-cache 1338 ** feature is enabled (if sqlite3Tsd()->useSharedData is true). They are 1339 ** used to store the set of table-locks required by the statement being 1340 ** compiled. Function sqlite3TableLock() is used to add entries to the 1341 ** list. 1342 */ 1343 struct Parse { 1344 sqlite3 *db; /* The main database structure */ 1345 int rc; /* Return code from execution */ 1346 char *zErrMsg; /* An error message */ 1347 Vdbe *pVdbe; /* An engine for executing database bytecode */ 1348 u8 colNamesSet; /* TRUE after OP_ColumnName has been issued to pVdbe */ 1349 u8 nameClash; /* A permanent table name clashes with temp table name */ 1350 u8 checkSchema; /* Causes schema cookie check after an error */ 1351 u8 nested; /* Number of nested calls to the parser/code generator */ 1352 u8 parseError; /* True after a parsing error. Ticket #1794 */ 1353 int nErr; /* Number of errors seen */ 1354 int nTab; /* Number of previously allocated VDBE cursors */ 1355 int nMem; /* Number of memory cells used so far */ 1356 int nSet; /* Number of sets used so far */ 1357 int ckOffset; /* Stack offset to data used by CHECK constraints */ 1358 u32 writeMask; /* Start a write transaction on these databases */ 1359 u32 cookieMask; /* Bitmask of schema verified databases */ 1360 int cookieGoto; /* Address of OP_Goto to cookie verifier subroutine */ 1361 int cookieValue[SQLITE_MAX_ATTACHED+2]; /* Values of cookies to verify */ 1362 #ifndef SQLITE_OMIT_SHARED_CACHE 1363 int nTableLock; /* Number of locks in aTableLock */ 1364 TableLock *aTableLock; /* Required table locks for shared-cache mode */ 1365 #endif 1366 1367 /* Above is constant between recursions. Below is reset before and after 1368 ** each recursion */ 1369 1370 int nVar; /* Number of '?' variables seen in the SQL so far */ 1371 int nVarExpr; /* Number of used slots in apVarExpr[] */ 1372 int nVarExprAlloc; /* Number of allocated slots in apVarExpr[] */ 1373 Expr **apVarExpr; /* Pointers to :aaa and $aaaa wildcard expressions */ 1374 u8 explain; /* True if the EXPLAIN flag is found on the query */ 1375 Token sErrToken; /* The token at which the error occurred */ 1376 Token sNameToken; /* Token with unqualified schema object name */ 1377 Token sLastToken; /* The last token parsed */ 1378 const char *zSql; /* All SQL text */ 1379 const char *zTail; /* All SQL text past the last semicolon parsed */ 1380 Table *pNewTable; /* A table being constructed by CREATE TABLE */ 1381 Trigger *pNewTrigger; /* Trigger under construct by a CREATE TRIGGER */ 1382 TriggerStack *trigStack; /* Trigger actions being coded */ 1383 const char *zAuthContext; /* The 6th parameter to db->xAuth callbacks */ 1384 #ifndef SQLITE_OMIT_VIRTUALTABLE 1385 Token sArg; /* Complete text of a module argument */ 1386 u8 declareVtab; /* True if inside sqlite3_declare_vtab() */ 1387 Table *pVirtualLock; /* Require virtual table lock on this table */ 1388 #endif 1389 #if defined(SQLITE_TEST) || SQLITE_MAX_EXPR_DEPTH>0 1390 int nHeight; /* Expression tree height of current sub-select */ 1391 #endif 1392 }; 1393 1394 #ifdef SQLITE_OMIT_VIRTUALTABLE 1395 #define IN_DECLARE_VTAB 0 1396 #else 1397 #define IN_DECLARE_VTAB (pParse->declareVtab) 1398 #endif 1399 1400 /* 1401 ** An instance of the following structure can be declared on a stack and used 1402 ** to save the Parse.zAuthContext value so that it can be restored later. 1403 */ 1404 struct AuthContext { 1405 const char *zAuthContext; /* Put saved Parse.zAuthContext here */ 1406 Parse *pParse; /* The Parse structure */ 1407 }; 1408 1409 /* 1410 ** Bitfield flags for P2 value in OP_Insert and OP_Delete 1411 */ 1412 #define OPFLAG_NCHANGE 1 /* Set to update db->nChange */ 1413 #define OPFLAG_LASTROWID 2 /* Set to update db->lastRowid */ 1414 #define OPFLAG_ISUPDATE 4 /* This OP_Insert is an sql UPDATE */ 1415 #define OPFLAG_APPEND 8 /* This is likely to be an append */ 1416 1417 /* 1418 * Each trigger present in the database schema is stored as an instance of 1419 * struct Trigger. 1420 * 1421 * Pointers to instances of struct Trigger are stored in two ways. 1422 * 1. In the "trigHash" hash table (part of the sqlite3* that represents the 1423 * database). This allows Trigger structures to be retrieved by name. 1424 * 2. All triggers associated with a single table form a linked list, using the 1425 * pNext member of struct Trigger. A pointer to the first element of the 1426 * linked list is stored as the "pTrigger" member of the associated 1427 * struct Table. 1428 * 1429 * The "step_list" member points to the first element of a linked list 1430 * containing the SQL statements specified as the trigger program. 1431 */ 1432 struct Trigger { 1433 char *name; /* The name of the trigger */ 1434 char *table; /* The table or view to which the trigger applies */ 1435 u8 op; /* One of TK_DELETE, TK_UPDATE, TK_INSERT */ 1436 u8 tr_tm; /* One of TRIGGER_BEFORE, TRIGGER_AFTER */ 1437 Expr *pWhen; /* The WHEN clause of the expresion (may be NULL) */ 1438 IdList *pColumns; /* If this is an UPDATE OF <column-list> trigger, 1439 the <column-list> is stored here */ 1440 Token nameToken; /* Token containing zName. Use during parsing only */ 1441 Schema *pSchema; /* Schema containing the trigger */ 1442 Schema *pTabSchema; /* Schema containing the table */ 1443 TriggerStep *step_list; /* Link list of trigger program steps */ 1444 Trigger *pNext; /* Next trigger associated with the table */ 1445 }; 1446 1447 /* 1448 ** A trigger is either a BEFORE or an AFTER trigger. The following constants 1449 ** determine which. 1450 ** 1451 ** If there are multiple triggers, you might of some BEFORE and some AFTER. 1452 ** In that cases, the constants below can be ORed together. 1453 */ 1454 #define TRIGGER_BEFORE 1 1455 #define TRIGGER_AFTER 2 1456 1457 /* 1458 * An instance of struct TriggerStep is used to store a single SQL statement 1459 * that is a part of a trigger-program. 1460 * 1461 * Instances of struct TriggerStep are stored in a singly linked list (linked 1462 * using the "pNext" member) referenced by the "step_list" member of the 1463 * associated struct Trigger instance. The first element of the linked list is 1464 * the first step of the trigger-program. 1465 * 1466 * The "op" member indicates whether this is a "DELETE", "INSERT", "UPDATE" or 1467 * "SELECT" statement. The meanings of the other members is determined by the 1468 * value of "op" as follows: 1469 * 1470 * (op == TK_INSERT) 1471 * orconf -> stores the ON CONFLICT algorithm 1472 * pSelect -> If this is an INSERT INTO ... SELECT ... statement, then 1473 * this stores a pointer to the SELECT statement. Otherwise NULL. 1474 * target -> A token holding the name of the table to insert into. 1475 * pExprList -> If this is an INSERT INTO ... VALUES ... statement, then 1476 * this stores values to be inserted. Otherwise NULL. 1477 * pIdList -> If this is an INSERT INTO ... (<column-names>) VALUES ... 1478 * statement, then this stores the column-names to be 1479 * inserted into. 1480 * 1481 * (op == TK_DELETE) 1482 * target -> A token holding the name of the table to delete from. 1483 * pWhere -> The WHERE clause of the DELETE statement if one is specified. 1484 * Otherwise NULL. 1485 * 1486 * (op == TK_UPDATE) 1487 * target -> A token holding the name of the table to update rows of. 1488 * pWhere -> The WHERE clause of the UPDATE statement if one is specified. 1489 * Otherwise NULL. 1490 * pExprList -> A list of the columns to update and the expressions to update 1491 * them to. See sqlite3Update() documentation of "pChanges" 1492 * argument. 1493 * 1494 */ 1495 struct TriggerStep { 1496 int op; /* One of TK_DELETE, TK_UPDATE, TK_INSERT, TK_SELECT */ 1497 int orconf; /* OE_Rollback etc. */ 1498 Trigger *pTrig; /* The trigger that this step is a part of */ 1499 1500 Select *pSelect; /* Valid for SELECT and sometimes 1501 INSERT steps (when pExprList == 0) */ 1502 Token target; /* Valid for DELETE, UPDATE, INSERT steps */ 1503 Expr *pWhere; /* Valid for DELETE, UPDATE steps */ 1504 ExprList *pExprList; /* Valid for UPDATE statements and sometimes 1505 INSERT steps (when pSelect == 0) */ 1506 IdList *pIdList; /* Valid for INSERT statements only */ 1507 TriggerStep *pNext; /* Next in the link-list */ 1508 TriggerStep *pLast; /* Last element in link-list. Valid for 1st elem only */ 1509 }; 1510 1511 /* 1512 * An instance of struct TriggerStack stores information required during code 1513 * generation of a single trigger program. While the trigger program is being 1514 * coded, its associated TriggerStack instance is pointed to by the 1515 * "pTriggerStack" member of the Parse structure. 1516 * 1517 * The pTab member points to the table that triggers are being coded on. The 1518 * newIdx member contains the index of the vdbe cursor that points at the temp 1519 * table that stores the new.* references. If new.* references are not valid 1520 * for the trigger being coded (for example an ON DELETE trigger), then newIdx 1521 * is set to -1. The oldIdx member is analogous to newIdx, for old.* references. 1522 * 1523 * The ON CONFLICT policy to be used for the trigger program steps is stored 1524 * as the orconf member. If this is OE_Default, then the ON CONFLICT clause 1525 * specified for individual triggers steps is used. 1526 * 1527 * struct TriggerStack has a "pNext" member, to allow linked lists to be 1528 * constructed. When coding nested triggers (triggers fired by other triggers) 1529 * each nested trigger stores its parent trigger's TriggerStack as the "pNext" 1530 * pointer. Once the nested trigger has been coded, the pNext value is restored 1531 * to the pTriggerStack member of the Parse stucture and coding of the parent 1532 * trigger continues. 1533 * 1534 * Before a nested trigger is coded, the linked list pointed to by the 1535 * pTriggerStack is scanned to ensure that the trigger is not about to be coded 1536 * recursively. If this condition is detected, the nested trigger is not coded. 1537 */ 1538 struct TriggerStack { 1539 Table *pTab; /* Table that triggers are currently being coded on */ 1540 int newIdx; /* Index of vdbe cursor to "new" temp table */ 1541 int oldIdx; /* Index of vdbe cursor to "old" temp table */ 1542 int orconf; /* Current orconf policy */ 1543 int ignoreJump; /* where to jump to for a RAISE(IGNORE) */ 1544 Trigger *pTrigger; /* The trigger currently being coded */ 1545 TriggerStack *pNext; /* Next trigger down on the trigger stack */ 1546 }; 1547 1548 /* 1549 ** The following structure contains information used by the sqliteFix... 1550 ** routines as they walk the parse tree to make database references 1551 ** explicit. 1552 */ 1553 typedef struct DbFixer DbFixer; 1554 struct DbFixer { 1555 Parse *pParse; /* The parsing context. Error messages written here */ 1556 const char *zDb; /* Make sure all objects are contained in this database */ 1557 const char *zType; /* Type of the container - used for error messages */ 1558 const Token *pName; /* Name of the container - used for error messages */ 1559 }; 1560 1561 /* 1562 ** A pointer to this structure is used to communicate information 1563 ** from sqlite3Init and OP_ParseSchema into the sqlite3InitCallback. 1564 */ 1565 typedef struct { 1566 sqlite3 *db; /* The database being initialized */ 1567 int iDb; /* 0 for main database. 1 for TEMP, 2.. for ATTACHed */ 1568 char **pzErrMsg; /* Error message stored here */ 1569 int rc; /* Result code stored here */ 1570 } InitData; 1571 1572 /* 1573 ** Assuming zIn points to the first byte of a UTF-8 character, 1574 ** advance zIn to point to the first byte of the next UTF-8 character. 1575 */ 1576 #define SQLITE_SKIP_UTF8(zIn) { \ 1577 if( (*(zIn++))>=0xc0 ){ \ 1578 while( (*zIn & 0xc0)==0x80 ){ zIn++; } \ 1579 } \ 1580 } 1581 1582 /* 1583 ** The SQLITE_CORRUPT_BKPT macro can be either a constant (for production 1584 ** builds) or a function call (for debugging). If it is a function call, 1585 ** it allows the operator to set a breakpoint at the spot where database 1586 ** corruption is first detected. 1587 */ 1588 #ifdef SQLITE_DEBUG 1589 int sqlite3Corrupt(void); 1590 # define SQLITE_CORRUPT_BKPT sqlite3Corrupt() 1591 #else 1592 # define SQLITE_CORRUPT_BKPT SQLITE_CORRUPT 1593 #endif 1594 1595 /* 1596 ** Internal function prototypes 1597 */ 1598 int sqlite3StrICmp(const char *, const char *); 1599 int sqlite3StrNICmp(const char *, const char *, int); 1600 int sqlite3IsNumber(const char*, int*, u8); 1601 1602 void *sqlite3MallocZero(unsigned); 1603 void *sqlite3DbMallocZero(sqlite3*, unsigned); 1604 void *sqlite3DbMallocRaw(sqlite3*, unsigned); 1605 char *sqlite3StrDup(const char*); 1606 char *sqlite3StrNDup(const char*, int); 1607 char *sqlite3DbStrDup(sqlite3*,const char*); 1608 char *sqlite3DbStrNDup(sqlite3*,const char*, int); 1609 void *sqlite3DbReallocOrFree(sqlite3 *, void *, int); 1610 void *sqlite3DbRealloc(sqlite3 *, void *, int); 1611 1612 char *sqlite3MPrintf(sqlite3*,const char*, ...); 1613 char *sqlite3VMPrintf(sqlite3*,const char*, va_list); 1614 #if defined(SQLITE_TEST) || defined(SQLITE_DEBUG) 1615 void sqlite3DebugPrintf(const char*, ...); 1616 void *sqlite3TextToPtr(const char*); 1617 #endif 1618 void sqlite3SetString(char **, ...); 1619 void sqlite3ErrorMsg(Parse*, const char*, ...); 1620 void sqlite3ErrorClear(Parse*); 1621 void sqlite3Dequote(char*); 1622 void sqlite3DequoteExpr(sqlite3*, Expr*); 1623 int sqlite3KeywordCode(const unsigned char*, int); 1624 int sqlite3RunParser(Parse*, const char*, char **); 1625 void sqlite3FinishCoding(Parse*); 1626 Expr *sqlite3Expr(sqlite3*, int, Expr*, Expr*, const Token*); 1627 Expr *sqlite3PExpr(Parse*, int, Expr*, Expr*, const Token*); 1628 Expr *sqlite3RegisterExpr(Parse*,Token*); 1629 Expr *sqlite3ExprAnd(sqlite3*,Expr*, Expr*); 1630 void sqlite3ExprSpan(Expr*,Token*,Token*); 1631 Expr *sqlite3ExprFunction(Parse*,ExprList*, Token*); 1632 void sqlite3ExprAssignVarNumber(Parse*, Expr*); 1633 void sqlite3ExprDelete(Expr*); 1634 ExprList *sqlite3ExprListAppend(Parse*,ExprList*,Expr*,Token*); 1635 void sqlite3ExprListDelete(ExprList*); 1636 int sqlite3Init(sqlite3*, char**); 1637 int sqlite3InitCallback(void*, int, char**, char**); 1638 void sqlite3Pragma(Parse*,Token*,Token*,Token*,int); 1639 void sqlite3ResetInternalSchema(sqlite3*, int); 1640 void sqlite3BeginParse(Parse*,int); 1641 void sqlite3CommitInternalChanges(sqlite3*); 1642 Table *sqlite3ResultSetOfSelect(Parse*,char*,Select*); 1643 void sqlite3OpenMasterTable(Parse *, int); 1644 void sqlite3StartTable(Parse*,Token*,Token*,int,int,int,int); 1645 void sqlite3AddColumn(Parse*,Token*); 1646 void sqlite3AddNotNull(Parse*, int); 1647 void sqlite3AddPrimaryKey(Parse*, ExprList*, int, int, int); 1648 void sqlite3AddCheckConstraint(Parse*, Expr*); 1649 void sqlite3AddColumnType(Parse*,Token*); 1650 void sqlite3AddDefaultValue(Parse*,Expr*); 1651 void sqlite3AddCollateType(Parse*, Token*); 1652 void sqlite3EndTable(Parse*,Token*,Token*,Select*); 1653 1654 void sqlite3CreateView(Parse*,Token*,Token*,Token*,Select*,int,int); 1655 1656 #if !defined(SQLITE_OMIT_VIEW) || !defined(SQLITE_OMIT_VIRTUALTABLE) 1657 int sqlite3ViewGetColumnNames(Parse*,Table*); 1658 #else 1659 # define sqlite3ViewGetColumnNames(A,B) 0 1660 #endif 1661 1662 void sqlite3DropTable(Parse*, SrcList*, int, int); 1663 void sqlite3DeleteTable(Table*); 1664 void sqlite3Insert(Parse*, SrcList*, ExprList*, Select*, IdList*, int); 1665 void *sqlite3ArrayAllocate(sqlite3*,void*,int,int,int*,int*,int*); 1666 IdList *sqlite3IdListAppend(sqlite3*, IdList*, Token*); 1667 int sqlite3IdListIndex(IdList*,const char*); 1668 SrcList *sqlite3SrcListAppend(sqlite3*, SrcList*, Token*, Token*); 1669 SrcList *sqlite3SrcListAppendFromTerm(Parse*, SrcList*, Token*, Token*, Token*, 1670 Select*, Expr*, IdList*); 1671 void sqlite3SrcListShiftJoinType(SrcList*); 1672 void sqlite3SrcListAssignCursors(Parse*, SrcList*); 1673 void sqlite3IdListDelete(IdList*); 1674 void sqlite3SrcListDelete(SrcList*); 1675 void sqlite3CreateIndex(Parse*,Token*,Token*,SrcList*,ExprList*,int,Token*, 1676 Token*, int, int); 1677 void sqlite3DropIndex(Parse*, SrcList*, int); 1678 int sqlite3Select(Parse*, Select*, int, int, Select*, int, int*, char *aff); 1679 Select *sqlite3SelectNew(Parse*,ExprList*,SrcList*,Expr*,ExprList*, 1680 Expr*,ExprList*,int,Expr*,Expr*); 1681 void sqlite3SelectDelete(Select*); 1682 Table *sqlite3SrcListLookup(Parse*, SrcList*); 1683 int sqlite3IsReadOnly(Parse*, Table*, int); 1684 void sqlite3OpenTable(Parse*, int iCur, int iDb, Table*, int); 1685 void sqlite3DeleteFrom(Parse*, SrcList*, Expr*); 1686 void sqlite3Update(Parse*, SrcList*, ExprList*, Expr*, int); 1687 WhereInfo *sqlite3WhereBegin(Parse*, SrcList*, Expr*, ExprList**); 1688 void sqlite3WhereEnd(WhereInfo*); 1689 void sqlite3ExprCodeGetColumn(Vdbe*, Table*, int, int); 1690 void sqlite3ExprCode(Parse*, Expr*); 1691 void sqlite3ExprCodeAndCache(Parse*, Expr*); 1692 int sqlite3ExprCodeExprList(Parse*, ExprList*); 1693 void sqlite3ExprIfTrue(Parse*, Expr*, int, int); 1694 void sqlite3ExprIfFalse(Parse*, Expr*, int, int); 1695 Table *sqlite3FindTable(sqlite3*,const char*, const char*); 1696 Table *sqlite3LocateTable(Parse*,const char*, const char*); 1697 Index *sqlite3FindIndex(sqlite3*,const char*, const char*); 1698 void sqlite3UnlinkAndDeleteTable(sqlite3*,int,const char*); 1699 void sqlite3UnlinkAndDeleteIndex(sqlite3*,int,const char*); 1700 void sqlite3Vacuum(Parse*); 1701 int sqlite3RunVacuum(char**, sqlite3*); 1702 char *sqlite3NameFromToken(sqlite3*, Token*); 1703 int sqlite3ExprCompare(Expr*, Expr*); 1704 int sqlite3ExprResolveNames(NameContext *, Expr *); 1705 int sqlite3ExprAnalyzeAggregates(NameContext*, Expr*); 1706 int sqlite3ExprAnalyzeAggList(NameContext*,ExprList*); 1707 Vdbe *sqlite3GetVdbe(Parse*); 1708 Expr *sqlite3CreateIdExpr(Parse *, const char*); 1709 void sqlite3Randomness(int, void*); 1710 void sqlite3RollbackAll(sqlite3*); 1711 void sqlite3CodeVerifySchema(Parse*, int); 1712 void sqlite3BeginTransaction(Parse*, int); 1713 void sqlite3CommitTransaction(Parse*); 1714 void sqlite3RollbackTransaction(Parse*); 1715 int sqlite3ExprIsConstant(Expr*); 1716 int sqlite3ExprIsConstantNotJoin(Expr*); 1717 int sqlite3ExprIsConstantOrFunction(Expr*); 1718 int sqlite3ExprIsInteger(Expr*, int*); 1719 int sqlite3IsRowid(const char*); 1720 void sqlite3GenerateRowDelete(sqlite3*, Vdbe*, Table*, int, int); 1721 void sqlite3GenerateRowIndexDelete(Vdbe*, Table*, int, char*); 1722 void sqlite3GenerateIndexKey(Vdbe*, Index*, int); 1723 void sqlite3GenerateConstraintChecks(Parse*,Table*,int,char*,int,int,int,int); 1724 void sqlite3CompleteInsertion(Parse*, Table*, int, char*, int, int, int, int); 1725 void sqlite3OpenTableAndIndices(Parse*, Table*, int, int); 1726 void sqlite3BeginWriteOperation(Parse*, int, int); 1727 Expr *sqlite3ExprDup(sqlite3*,Expr*); 1728 void sqlite3TokenCopy(sqlite3*,Token*, Token*); 1729 ExprList *sqlite3ExprListDup(sqlite3*,ExprList*); 1730 SrcList *sqlite3SrcListDup(sqlite3*,SrcList*); 1731 IdList *sqlite3IdListDup(sqlite3*,IdList*); 1732 Select *sqlite3SelectDup(sqlite3*,Select*); 1733 FuncDef *sqlite3FindFunction(sqlite3*,const char*,int,int,u8,int); 1734 void sqlite3RegisterBuiltinFunctions(sqlite3*); 1735 void sqlite3RegisterDateTimeFunctions(sqlite3*); 1736 int sqlite3SafetyOn(sqlite3*); 1737 int sqlite3SafetyOff(sqlite3*); 1738 int sqlite3SafetyCheck(sqlite3*); 1739 void sqlite3ChangeCookie(sqlite3*, Vdbe*, int); 1740 1741 #ifndef SQLITE_OMIT_TRIGGER 1742 void sqlite3BeginTrigger(Parse*, Token*,Token*,int,int,IdList*,SrcList*, 1743 Expr*,int, int); 1744 void sqlite3FinishTrigger(Parse*, TriggerStep*, Token*); 1745 void sqlite3DropTrigger(Parse*, SrcList*, int); 1746 void sqlite3DropTriggerPtr(Parse*, Trigger*); 1747 int sqlite3TriggersExist(Parse*, Table*, int, ExprList*); 1748 int sqlite3CodeRowTrigger(Parse*, int, ExprList*, int, Table *, int, int, 1749 int, int); 1750 void sqliteViewTriggers(Parse*, Table*, Expr*, int, ExprList*); 1751 void sqlite3DeleteTriggerStep(TriggerStep*); 1752 TriggerStep *sqlite3TriggerSelectStep(sqlite3*,Select*); 1753 TriggerStep *sqlite3TriggerInsertStep(sqlite3*,Token*, IdList*, 1754 ExprList*,Select*,int); 1755 TriggerStep *sqlite3TriggerUpdateStep(sqlite3*,Token*,ExprList*, Expr*, int); 1756 TriggerStep *sqlite3TriggerDeleteStep(sqlite3*,Token*, Expr*); 1757 void sqlite3DeleteTrigger(Trigger*); 1758 void sqlite3UnlinkAndDeleteTrigger(sqlite3*,int,const char*); 1759 #else 1760 # define sqlite3TriggersExist(A,B,C,D,E,F) 0 1761 # define sqlite3DeleteTrigger(A) 1762 # define sqlite3DropTriggerPtr(A,B) 1763 # define sqlite3UnlinkAndDeleteTrigger(A,B,C) 1764 # define sqlite3CodeRowTrigger(A,B,C,D,E,F,G,H,I) 0 1765 #endif 1766 1767 int sqlite3JoinType(Parse*, Token*, Token*, Token*); 1768 void sqlite3CreateForeignKey(Parse*, ExprList*, Token*, ExprList*, int); 1769 void sqlite3DeferForeignKey(Parse*, int); 1770 #ifndef SQLITE_OMIT_AUTHORIZATION 1771 void sqlite3AuthRead(Parse*,Expr*,Schema*,SrcList*); 1772 int sqlite3AuthCheck(Parse*,int, const char*, const char*, const char*); 1773 void sqlite3AuthContextPush(Parse*, AuthContext*, const char*); 1774 void sqlite3AuthContextPop(AuthContext*); 1775 #else 1776 # define sqlite3AuthRead(a,b,c,d) 1777 # define sqlite3AuthCheck(a,b,c,d,e) SQLITE_OK 1778 # define sqlite3AuthContextPush(a,b,c) 1779 # define sqlite3AuthContextPop(a) ((void)(a)) 1780 #endif 1781 void sqlite3Attach(Parse*, Expr*, Expr*, Expr*); 1782 void sqlite3Detach(Parse*, Expr*); 1783 int sqlite3BtreeFactory(const sqlite3 *db, const char *zFilename, 1784 int omitJournal, int nCache, int flags, Btree **ppBtree); 1785 int sqlite3FixInit(DbFixer*, Parse*, int, const char*, const Token*); 1786 int sqlite3FixSrcList(DbFixer*, SrcList*); 1787 int sqlite3FixSelect(DbFixer*, Select*); 1788 int sqlite3FixExpr(DbFixer*, Expr*); 1789 int sqlite3FixExprList(DbFixer*, ExprList*); 1790 int sqlite3FixTriggerStep(DbFixer*, TriggerStep*); 1791 int sqlite3AtoF(const char *z, double*); 1792 char *sqlite3_snprintf(int,char*,const char*,...); 1793 int sqlite3GetInt32(const char *, int*); 1794 int sqlite3FitsIn64Bits(const char *, int); 1795 int sqlite3Utf16ByteLen(const void *pData, int nChar); 1796 int sqlite3Utf8CharLen(const char *pData, int nByte); 1797 int sqlite3Utf8Read(const u8*, const u8*, const u8**); 1798 int sqlite3PutVarint(unsigned char *, u64); 1799 int sqlite3GetVarint(const unsigned char *, u64 *); 1800 int sqlite3GetVarint32(const unsigned char *, u32 *); 1801 int sqlite3VarintLen(u64 v); 1802 void sqlite3IndexAffinityStr(Vdbe *, Index *); 1803 void sqlite3TableAffinityStr(Vdbe *, Table *); 1804 char sqlite3CompareAffinity(Expr *pExpr, char aff2); 1805 int sqlite3IndexAffinityOk(Expr *pExpr, char idx_affinity); 1806 char sqlite3ExprAffinity(Expr *pExpr); 1807 int sqlite3Atoi64(const char*, i64*); 1808 void sqlite3Error(sqlite3*, int, const char*,...); 1809 void *sqlite3HexToBlob(sqlite3*, const char *z); 1810 int sqlite3TwoPartName(Parse *, Token *, Token *, Token **); 1811 const char *sqlite3ErrStr(int); 1812 int sqlite3ReadSchema(Parse *pParse); 1813 CollSeq *sqlite3FindCollSeq(sqlite3*,u8 enc, const char *,int,int); 1814 CollSeq *sqlite3LocateCollSeq(Parse *pParse, const char *zName, int nName); 1815 CollSeq *sqlite3ExprCollSeq(Parse *pParse, Expr *pExpr); 1816 Expr *sqlite3ExprSetColl(Parse *pParse, Expr *, Token *); 1817 int sqlite3CheckCollSeq(Parse *, CollSeq *); 1818 int sqlite3CheckObjectName(Parse *, const char *); 1819 void sqlite3VdbeSetChanges(sqlite3 *, int); 1820 1821 const void *sqlite3ValueText(sqlite3_value*, u8); 1822 int sqlite3ValueBytes(sqlite3_value*, u8); 1823 void sqlite3ValueSetStr(sqlite3_value*, int, const void *,u8, 1824 void(*)(void*)); 1825 void sqlite3ValueFree(sqlite3_value*); 1826 sqlite3_value *sqlite3ValueNew(sqlite3 *); 1827 char *sqlite3Utf16to8(sqlite3 *, const void*, int); 1828 int sqlite3ValueFromExpr(sqlite3 *, Expr *, u8, u8, sqlite3_value **); 1829 void sqlite3ValueApplyAffinity(sqlite3_value *, u8, u8); 1830 #ifndef SQLITE_AMALGAMATION 1831 extern const unsigned char sqlite3UpperToLower[]; 1832 #endif 1833 void sqlite3RootPageMoved(Db*, int, int); 1834 void sqlite3Reindex(Parse*, Token*, Token*); 1835 void sqlite3AlterFunctions(sqlite3*); 1836 void sqlite3AlterRenameTable(Parse*, SrcList*, Token*); 1837 int sqlite3GetToken(const unsigned char *, int *); 1838 void sqlite3NestedParse(Parse*, const char*, ...); 1839 void sqlite3ExpirePreparedStatements(sqlite3*); 1840 void sqlite3CodeSubselect(Parse *, Expr *); 1841 int sqlite3SelectResolve(Parse *, Select *, NameContext *); 1842 void sqlite3ColumnDefault(Vdbe *, Table *, int); 1843 void sqlite3AlterFinishAddColumn(Parse *, Token *); 1844 void sqlite3AlterBeginAddColumn(Parse *, SrcList *); 1845 CollSeq *sqlite3GetCollSeq(sqlite3*, CollSeq *, const char *, int); 1846 char sqlite3AffinityType(const Token*); 1847 void sqlite3Analyze(Parse*, Token*, Token*); 1848 int sqlite3InvokeBusyHandler(BusyHandler*); 1849 int sqlite3FindDb(sqlite3*, Token*); 1850 int sqlite3AnalysisLoad(sqlite3*,int iDB); 1851 void sqlite3DefaultRowEst(Index*); 1852 void sqlite3RegisterLikeFunctions(sqlite3*, int); 1853 int sqlite3IsLikeFunction(sqlite3*,Expr*,int*,char*); 1854 void sqlite3AttachFunctions(sqlite3 *); 1855 void sqlite3MinimumFileFormat(Parse*, int, int); 1856 void sqlite3SchemaFree(void *); 1857 Schema *sqlite3SchemaGet(sqlite3 *, Btree *); 1858 int sqlite3SchemaToIndex(sqlite3 *db, Schema *); 1859 KeyInfo *sqlite3IndexKeyinfo(Parse *, Index *); 1860 int sqlite3CreateFunc(sqlite3 *, const char *, int, int, void *, 1861 void (*)(sqlite3_context*,int,sqlite3_value **), 1862 void (*)(sqlite3_context*,int,sqlite3_value **), void (*)(sqlite3_context*)); 1863 int sqlite3ApiExit(sqlite3 *db, int); 1864 void sqlite3AbortOtherActiveVdbes(sqlite3 *, Vdbe *); 1865 int sqlite3OpenTempDatabase(Parse *); 1866 1867 1868 /* 1869 ** The interface to the LEMON-generated parser 1870 */ 1871 void *sqlite3ParserAlloc(void*(*)(size_t)); 1872 void sqlite3ParserFree(void*, void(*)(void*)); 1873 void sqlite3Parser(void*, int, Token, Parse*); 1874 1875 #ifndef SQLITE_OMIT_LOAD_EXTENSION 1876 void sqlite3CloseExtensions(sqlite3*); 1877 int sqlite3AutoLoadExtensions(sqlite3*); 1878 #else 1879 # define sqlite3CloseExtensions(X) 1880 # define sqlite3AutoLoadExtensions(X) SQLITE_OK 1881 #endif 1882 1883 #ifndef SQLITE_OMIT_SHARED_CACHE 1884 void sqlite3TableLock(Parse *, int, int, u8, const char *); 1885 #else 1886 #define sqlite3TableLock(v,w,x,y,z) 1887 #endif 1888 1889 #ifdef SQLITE_TEST 1890 int sqlite3Utf8To8(unsigned char*); 1891 #endif 1892 1893 /* 1894 ** The MallocDisallow() and MallocAllow() routines are like asserts. 1895 ** Call them around a section of code that you do not expect to do 1896 ** any memory allocation. 1897 */ 1898 #ifdef SQLITE_MEMDEBUG 1899 void sqlite3MallocDisallow(void); 1900 void sqlite3MallocAllow(void); 1901 void sqlite3MallocBenignFailure(int); 1902 void sqlite3MallocEnterBenignBlock(int isBenign); 1903 void sqlite3MallocLeaveBenignBlock(); 1904 #else 1905 # define sqlite3MallocDisallow() 1906 # define sqlite3MallocAllow() 1907 # define sqlite3MallocBenignFailure(x) 1908 # define sqlite3MallocEnterBenignBlock(x); 1909 # define sqlite3MallocLeaveBenignBlock(); 1910 #endif 1911 1912 1913 #ifdef SQLITE_OMIT_VIRTUALTABLE 1914 # define sqlite3VtabClear(X) 1915 # define sqlite3VtabSync(X,Y) (Y) 1916 # define sqlite3VtabRollback(X) 1917 # define sqlite3VtabCommit(X) 1918 #else 1919 void sqlite3VtabClear(Table*); 1920 int sqlite3VtabSync(sqlite3 *db, int rc); 1921 int sqlite3VtabRollback(sqlite3 *db); 1922 int sqlite3VtabCommit(sqlite3 *db); 1923 #endif 1924 void sqlite3VtabLock(sqlite3_vtab*); 1925 void sqlite3VtabUnlock(sqlite3*, sqlite3_vtab*); 1926 void sqlite3VtabBeginParse(Parse*, Token*, Token*, Token*); 1927 void sqlite3VtabFinishParse(Parse*, Token*); 1928 void sqlite3VtabArgInit(Parse*); 1929 void sqlite3VtabArgExtend(Parse*, Token*); 1930 int sqlite3VtabCallCreate(sqlite3*, int, const char *, char **); 1931 int sqlite3VtabCallConnect(Parse*, Table*); 1932 int sqlite3VtabCallDestroy(sqlite3*, int, const char *); 1933 int sqlite3VtabBegin(sqlite3 *, sqlite3_vtab *); 1934 FuncDef *sqlite3VtabOverloadFunction(sqlite3 *,FuncDef*, int nArg, Expr*); 1935 void sqlite3InvalidFunction(sqlite3_context*,int,sqlite3_value**); 1936 int sqlite3Reprepare(Vdbe*); 1937 void sqlite3ExprListCheckLength(Parse*, ExprList*, int, const char*); 1938 CollSeq *sqlite3BinaryCompareCollSeq(Parse *, Expr *, Expr *); 1939 1940 #ifdef SQLITE_ENABLE_ATOMIC_WRITE 1941 int sqlite3JournalOpen(sqlite3_vfs *, const char *, sqlite3_file *, int, int); 1942 int sqlite3JournalSize(sqlite3_vfs *); 1943 int sqlite3JournalCreate(sqlite3_file *); 1944 #else 1945 #define sqlite3JournalSize(pVfs) ((pVfs)->szOsFile) 1946 #endif 1947 1948 #if defined(SQLITE_TEST) || SQLITE_MAX_EXPR_DEPTH>0 1949 void sqlite3ExprSetHeight(Expr *); 1950 int sqlite3SelectExprHeight(Select *); 1951 #else 1952 #define sqlite3ExprSetHeight(x) 1953 #endif 1954 1955 u32 sqlite3Get4byte(const u8*); 1956 void sqlite3Put4byte(u8*, u32); 1957 1958 #ifdef SQLITE_SSE 1959 #include "sseInt.h" 1960 #endif 1961 1962 #ifdef SQLITE_DEBUG 1963 void sqlite3ParserTrace(FILE*, char *); 1964 #endif 1965 1966 /* 1967 ** If the SQLITE_ENABLE IOTRACE exists then the global variable 1968 ** sqlite3_io_trace is a pointer to a printf-like routine used to 1969 ** print I/O tracing messages. 1970 */ 1971 #ifdef SQLITE_ENABLE_IOTRACE 1972 # define IOTRACE(A) if( sqlite3_io_trace ){ sqlite3_io_trace A; } 1973 void sqlite3VdbeIOTraceSql(Vdbe*); 1974 #else 1975 # define IOTRACE(A) 1976 # define sqlite3VdbeIOTraceSql(X) 1977 #endif 1978 SQLITE_EXTERN void (*sqlite3_io_trace)(const char*,...); 1979 1980 #endif 1981