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drh75897232000-05-29 14:26:00 +00001/*
drhb19a2bc2001-09-16 00:13:26 +00002** 2001 September 15
drh75897232000-05-29 14:26:00 +00003**
drhb19a2bc2001-09-16 00:13:26 +00004** The author disclaims copyright to this source code. In place of
5** a legal notice, here is a blessing:
drh75897232000-05-29 14:26:00 +00006**
drhb19a2bc2001-09-16 00:13:26 +00007** 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.
drh75897232000-05-29 14:26:00 +000010**
11*************************************************************************
12** Internal interface definitions for SQLite.
13**
drh41f58522005-06-06 15:06:39 +000014** @(#) $Id: sqliteInt.h,v 1.385 2005/06/06 15:06:39 drh Exp $
drh75897232000-05-29 14:26:00 +000015*/
danielk1977e3026632004-06-22 11:29:02 +000016#ifndef _SQLITEINT_H_
17#define _SQLITEINT_H_
18
drheb206252004-10-01 02:00:31 +000019/*
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** Large file support can be disabled using the -DSQLITE_DISABLE_LFS switch
25** on the compiler command line. This is necessary if you are compiling
26** on a recent machine (ex: RedHat 7.2) but you want your code to work
27** on an older machine (ex: RedHat 6.0). If you compile on RedHat 7.2
28** without this option, LFS is enable. But LFS does not exist in the kernel
29** in RedHat 6.0, so the code won't work. Hence, for maximum binary
30** portability you should omit LFS.
31**
32** Similar is true for MacOS. LFS is only supported on MacOS 9 and later.
33*/
34#ifndef SQLITE_DISABLE_LFS
35# define _LARGE_FILE 1
36# ifndef _FILE_OFFSET_BITS
37# define _FILE_OFFSET_BITS 64
38# endif
39# define _LARGEFILE_SOURCE 1
40#endif
41
drh1d482dd2004-05-31 18:23:07 +000042#include "sqlite3.h"
drhbeae3192001-09-22 18:12:08 +000043#include "hash.h"
drh75897232000-05-29 14:26:00 +000044#include "parse.h"
drh75897232000-05-29 14:26:00 +000045#include <stdio.h>
46#include <stdlib.h>
47#include <string.h>
48#include <assert.h>
drh52370e22005-01-21 21:31:40 +000049#include <stddef.h>
drh75897232000-05-29 14:26:00 +000050
drh967e8b72000-06-21 13:59:10 +000051/*
drha1b351a2001-09-14 16:42:12 +000052** The maximum number of in-memory pages to use for the main database
danielk197724c8ab82005-02-09 01:40:23 +000053** table and for temporary tables. Internally, the MAX_PAGES and
54** TEMP_PAGES macros are used. To override the default values at
55** compilation time, the SQLITE_DEFAULT_CACHE_SIZE and
56** SQLITE_DEFAULT_TEMP_CACHE_SIZE macros should be set.
drha1b351a2001-09-14 16:42:12 +000057*/
drh1ba1e6e2005-01-21 21:22:52 +000058#ifdef SQLITE_DEFAULT_CACHE_SIZE
59# define MAX_PAGES SQLITE_DEFAULT_CACHE_SIZE
60#else
61# define MAX_PAGES 2000
62#endif
danielk197724c8ab82005-02-09 01:40:23 +000063#ifdef SQLITE_DEFAULT_TEMP_CACHE_SIZE
64# define TEMP_PAGES SQLITE_DEFAULT_TEMP_CACHE_SIZE
65#else
66# define TEMP_PAGES 500
67#endif
drha1b351a2001-09-14 16:42:12 +000068
69/*
danielk197753c0f742005-03-29 03:10:59 +000070** OMIT_TEMPDB is set to 1 if SQLITE_OMIT_TEMPDB is defined, or 0
71** afterward. Having this macro allows us to cause the C compiler
72** to omit code used by TEMP tables without messy #ifndef statements.
73*/
74#ifdef SQLITE_OMIT_TEMPDB
75#define OMIT_TEMPDB 1
76#else
77#define OMIT_TEMPDB 0
78#endif
79
80/*
drh0bd1f4e2002-06-06 18:54:39 +000081** If the following macro is set to 1, then NULL values are considered
82** distinct for the SELECT DISTINCT statement and for UNION or EXCEPT
83** compound queries. No other SQL database engine (among those tested)
84** works this way except for OCELOT. But the SQL92 spec implies that
85** this is how things should work.
86**
87** If the following macro is set to 0, then NULLs are indistinct for
88** SELECT DISTINCT and for UNION.
89*/
90#define NULL_ALWAYS_DISTINCT 0
91
92/*
93** If the following macro is set to 1, then NULL values are considered
94** distinct when determining whether or not two entries are the same
95** in a UNIQUE index. This is the way PostgreSQL, Oracle, DB2, MySQL,
96** OCELOT, and Firebird all work. The SQL92 spec explicitly says this
97** is the way things are suppose to work.
98**
99** If the following macro is set to 0, the NULLs are indistinct for
100** a UNIQUE index. In this mode, you can only have a single NULL entry
101** for a column declared UNIQUE. This is the way Informix and SQL Server
102** work.
103*/
104#define NULL_DISTINCT_FOR_UNIQUE 1
105
106/*
drh665de472003-03-31 13:36:09 +0000107** The maximum number of attached databases. This must be at least 2
108** in order to support the main database file (0) and the file used to
drh80242052004-06-09 00:48:12 +0000109** hold temporary tables (1). And it must be less than 32 because
110** we use a bitmask of databases with a u32 in places (for example
111** the Parse.cookieMask field).
drh665de472003-03-31 13:36:09 +0000112*/
113#define MAX_ATTACHED 10
114
115/*
drhfa6bc002004-09-07 16:19:52 +0000116** The maximum value of a ?nnn wildcard that the parser will accept.
117*/
118#define SQLITE_MAX_VARIABLE_NUMBER 999
119
120/*
drh13bff812003-04-15 01:19:47 +0000121** When building SQLite for embedded systems where memory is scarce,
122** you can define one or more of the following macros to omit extra
123** features of the library and thus keep the size of the library to
124** a minimum.
125*/
126/* #define SQLITE_OMIT_AUTHORIZATION 1 */
danielk19773e8c37e2005-01-21 03:12:14 +0000127/* #define SQLITE_OMIT_MEMORYDB 1 */
drh13bff812003-04-15 01:19:47 +0000128/* #define SQLITE_OMIT_VACUUM 1 */
drh0a5294b2003-11-11 23:30:35 +0000129/* #define SQLITE_OMIT_DATETIME_FUNCS 1 */
danielk1977348bb5d2003-10-18 09:37:26 +0000130/* #define SQLITE_OMIT_PROGRESS_CALLBACK 1 */
danielk197745901d62004-11-10 15:27:38 +0000131/* #define SQLITE_OMIT_AUTOVACUUM */
danielk19779fd2a9a2004-11-12 13:42:30 +0000132/* #define SQLITE_OMIT_ALTERTABLE */
drh13bff812003-04-15 01:19:47 +0000133
134/*
drh49766d62005-01-08 18:42:28 +0000135** Provide a default value for TEMP_STORE in case it is not specified
136** on the command-line
137*/
138#ifndef TEMP_STORE
139# define TEMP_STORE 1
140#endif
141
142/*
drhf1974842004-11-05 03:56:00 +0000143** GCC does not define the offsetof() macro so we'll have to do it
144** ourselves.
145*/
146#ifndef offsetof
147#define offsetof(STRUCTURE,FIELD) ((int)((char*)&((STRUCTURE*)0)->FIELD))
148#endif
149
150/*
drh5a2c2c22001-11-21 02:21:11 +0000151** Integers of known sizes. These typedefs might change for architectures
152** where the sizes very. Preprocessor macros are available so that the
153** types can be conveniently redefined at compile-type. Like this:
154**
155** cc '-DUINTPTR_TYPE=long long int' ...
drh41a2b482001-01-20 19:52:49 +0000156*/
drh3aac2dd2004-04-26 14:10:20 +0000157#ifndef UINT64_TYPE
drhefad9992004-06-22 12:13:55 +0000158# if defined(_MSC_VER) || defined(__BORLANDC__)
159# define UINT64_TYPE unsigned __int64
160# else
161# define UINT64_TYPE unsigned long long int
162# endif
drh3aac2dd2004-04-26 14:10:20 +0000163#endif
drh5a2c2c22001-11-21 02:21:11 +0000164#ifndef UINT32_TYPE
165# define UINT32_TYPE unsigned int
166#endif
167#ifndef UINT16_TYPE
168# define UINT16_TYPE unsigned short int
169#endif
drh939a16d2004-07-15 13:37:22 +0000170#ifndef INT16_TYPE
171# define INT16_TYPE short int
172#endif
drh5a2c2c22001-11-21 02:21:11 +0000173#ifndef UINT8_TYPE
174# define UINT8_TYPE unsigned char
175#endif
drh905793e2004-02-21 13:31:09 +0000176#ifndef INT8_TYPE
177# define INT8_TYPE signed char
178#endif
drhefad9992004-06-22 12:13:55 +0000179#ifndef LONGDOUBLE_TYPE
180# define LONGDOUBLE_TYPE long double
181#endif
drhefad9992004-06-22 12:13:55 +0000182typedef sqlite_int64 i64; /* 8-byte signed integer */
drh3aac2dd2004-04-26 14:10:20 +0000183typedef UINT64_TYPE u64; /* 8-byte unsigned integer */
drh5a2c2c22001-11-21 02:21:11 +0000184typedef UINT32_TYPE u32; /* 4-byte unsigned integer */
185typedef UINT16_TYPE u16; /* 2-byte unsigned integer */
drh939a16d2004-07-15 13:37:22 +0000186typedef INT16_TYPE i16; /* 2-byte signed integer */
drh5a2c2c22001-11-21 02:21:11 +0000187typedef UINT8_TYPE u8; /* 1-byte unsigned integer */
drh905793e2004-02-21 13:31:09 +0000188typedef UINT8_TYPE i8; /* 1-byte signed integer */
drh5a2c2c22001-11-21 02:21:11 +0000189
190/*
drhbbd42a62004-05-22 17:41:58 +0000191** Macros to determine whether the machine is big or little endian,
192** evaluated at runtime.
193*/
194extern const int sqlite3one;
drh9c054832004-05-31 18:51:57 +0000195#define SQLITE_BIGENDIAN (*(char *)(&sqlite3one)==0)
196#define SQLITE_LITTLEENDIAN (*(char *)(&sqlite3one)==1)
drhbbd42a62004-05-22 17:41:58 +0000197
198/*
drh90f5ecb2004-07-22 01:19:35 +0000199** An instance of the following structure is used to store the busy-handler
200** callback for a given sqlite handle.
201**
202** The sqlite.busyHandler member of the sqlite struct contains the busy
203** callback for the database handle. Each pager opened via the sqlite
204** handle is passed a pointer to sqlite.busyHandler. The busy-handler
205** callback is currently invoked only from within pager.c.
206*/
207typedef struct BusyHandler BusyHandler;
208struct BusyHandler {
209 int (*xFunc)(void *,int); /* The busy callback */
210 void *pArg; /* First arg to busy callback */
211};
212
213/*
214** Defer sourcing vdbe.h and btree.h until after the "u8" and
215** "BusyHandler typedefs.
drh905793e2004-02-21 13:31:09 +0000216*/
217#include "vdbe.h"
drh3aac2dd2004-04-26 14:10:20 +0000218#include "btree.h"
drh905793e2004-02-21 13:31:09 +0000219
220/*
drh5a2c2c22001-11-21 02:21:11 +0000221** This macro casts a pointer to an integer. Useful for doing
222** pointer arithmetic.
223*/
224#define Addr(X) ((uptr)X)
drh41a2b482001-01-20 19:52:49 +0000225
226/*
drh967e8b72000-06-21 13:59:10 +0000227** If memory allocation problems are found, recompile with
228**
drhfaa57ac2004-06-09 14:01:51 +0000229** -DSQLITE_DEBUG=1
drh967e8b72000-06-21 13:59:10 +0000230**
231** to enable some sanity checking on malloc() and free(). To
232** check for memory leaks, recompile with
233**
drhfaa57ac2004-06-09 14:01:51 +0000234** -DSQLITE_DEBUG=2
drh967e8b72000-06-21 13:59:10 +0000235**
236** and a line of text will be written to standard error for
237** each malloc() and free(). This output can be analyzed
238** by an AWK script to determine if there are any leaks.
239*/
danielk19772c336542005-01-13 02:14:23 +0000240#ifdef SQLITE_MEMDEBUG
danielk19774adee202004-05-08 08:23:19 +0000241# define sqliteMalloc(X) sqlite3Malloc_(X,1,__FILE__,__LINE__)
242# define sqliteMallocRaw(X) sqlite3Malloc_(X,0,__FILE__,__LINE__)
243# define sqliteFree(X) sqlite3Free_(X,__FILE__,__LINE__)
244# define sqliteRealloc(X,Y) sqlite3Realloc_(X,Y,__FILE__,__LINE__)
245# define sqliteStrDup(X) sqlite3StrDup_(X,__FILE__,__LINE__)
246# define sqliteStrNDup(X,Y) sqlite3StrNDup_(X,Y,__FILE__,__LINE__)
drhc3c2fc92000-05-31 22:58:39 +0000247#else
drh38f82712004-06-18 17:10:16 +0000248# define sqliteFree sqlite3FreeX
249# define sqliteMalloc sqlite3Malloc
250# define sqliteMallocRaw sqlite3MallocRaw
251# define sqliteRealloc sqlite3Realloc
drhae29ffb2004-09-25 14:39:18 +0000252# define sqliteStrDup sqlite3StrDup
253# define sqliteStrNDup sqlite3StrNDup
drhdcc581c2000-05-30 13:44:19 +0000254#endif
255
drh75897232000-05-29 14:26:00 +0000256/*
drhdaffd0e2001-04-11 14:28:42 +0000257** This variable gets set if malloc() ever fails. After it gets set,
258** the SQLite library shuts down permanently.
259*/
danielk19776f8a5032004-05-10 10:34:51 +0000260extern int sqlite3_malloc_failed;
drhdaffd0e2001-04-11 14:28:42 +0000261
262/*
drh6e142f52000-06-08 13:36:40 +0000263** The following global variables are used for testing and debugging
drhfaa57ac2004-06-09 14:01:51 +0000264** only. They only work if SQLITE_DEBUG is defined.
drh6e142f52000-06-08 13:36:40 +0000265*/
danielk19772c336542005-01-13 02:14:23 +0000266#ifdef SQLITE_MEMDEBUG
drh46934232004-11-20 19:18:00 +0000267extern int sqlite3_nMalloc; /* Number of sqliteMalloc() calls */
268extern int sqlite3_nFree; /* Number of sqliteFree() calls */
269extern int sqlite3_iMallocFail; /* Fail sqliteMalloc() after this many calls */
270extern int sqlite3_iMallocReset; /* Set iMallocFail to this when it reaches 0 */
drh6e142f52000-06-08 13:36:40 +0000271#endif
272
273/*
drh75897232000-05-29 14:26:00 +0000274** Name of the master database table. The master database table
275** is a special table that holds the names and attributes of all
276** user tables and indices.
277*/
drhe0bc4042002-06-25 01:09:11 +0000278#define MASTER_NAME "sqlite_master"
279#define TEMP_MASTER_NAME "sqlite_temp_master"
drh75897232000-05-29 14:26:00 +0000280
281/*
danielk19778e150812004-05-10 01:17:37 +0000282** The root-page of the master database table.
283*/
284#define MASTER_ROOT 1
285
286/*
drhed6c8672003-01-12 18:02:16 +0000287** The name of the schema table.
288*/
danielk197753c0f742005-03-29 03:10:59 +0000289#define SCHEMA_TABLE(x) ((!OMIT_TEMPDB)&&(x==1)?TEMP_MASTER_NAME:MASTER_NAME)
drhed6c8672003-01-12 18:02:16 +0000290
291/*
drh75897232000-05-29 14:26:00 +0000292** A convenience macro that returns the number of elements in
293** an array.
294*/
295#define ArraySize(X) (sizeof(X)/sizeof(X[0]))
296
297/*
298** Forward references to structures
299*/
drh7020f652000-06-03 18:06:52 +0000300typedef struct Column Column;
drh75897232000-05-29 14:26:00 +0000301typedef struct Table Table;
302typedef struct Index Index;
drh75897232000-05-29 14:26:00 +0000303typedef struct Expr Expr;
304typedef struct ExprList ExprList;
305typedef struct Parse Parse;
306typedef struct Token Token;
307typedef struct IdList IdList;
drhad3cab52002-05-24 02:04:32 +0000308typedef struct SrcList SrcList;
drh75897232000-05-29 14:26:00 +0000309typedef struct WhereInfo WhereInfo;
drh6b563442001-11-07 16:48:26 +0000310typedef struct WhereLevel WhereLevel;
drh9bb61fe2000-06-05 16:01:39 +0000311typedef struct Select Select;
drh22827922000-06-06 17:27:05 +0000312typedef struct AggExpr AggExpr;
drh0bce8352002-02-28 00:41:10 +0000313typedef struct FuncDef FuncDef;
danielk1977c3f9bad2002-05-15 08:30:12 +0000314typedef struct Trigger Trigger;
315typedef struct TriggerStep TriggerStep;
316typedef struct TriggerStack TriggerStack;
drhc2eef3b2002-08-31 18:53:06 +0000317typedef struct FKey FKey;
drh001bbcb2003-03-19 03:14:00 +0000318typedef struct Db Db;
drh85e20962003-04-25 17:52:11 +0000319typedef struct AuthContext AuthContext;
danielk19778d059842004-05-12 11:24:02 +0000320typedef struct KeyClass KeyClass;
drha9fd84b2004-05-18 23:21:35 +0000321typedef struct CollSeq CollSeq;
drhd3d39e92004-05-20 22:16:29 +0000322typedef struct KeyInfo KeyInfo;
drh626a8792005-01-17 22:08:19 +0000323typedef struct NameContext NameContext;
drhd3d39e92004-05-20 22:16:29 +0000324
drh001bbcb2003-03-19 03:14:00 +0000325/*
326** Each database file to be accessed by the system is an instance
327** of the following structure. There are normally two of these structures
328** in the sqlite.aDb[] array. aDb[0] is the main database file and
drha69d9162003-04-17 22:57:53 +0000329** aDb[1] is the database file used to hold temporary tables. Additional
330** databases may be attached.
drh001bbcb2003-03-19 03:14:00 +0000331*/
332struct Db {
333 char *zName; /* Name of this database */
334 Btree *pBt; /* The B*Tree structure for this database file */
335 int schema_cookie; /* Database schema version number for this file */
drhd24cc422003-03-27 12:51:24 +0000336 Hash tblHash; /* All tables indexed by name */
337 Hash idxHash; /* All (named) indices indexed by name */
338 Hash trigHash; /* All triggers indexed by name */
339 Hash aFKey; /* Foreign keys indexed by to-table */
drhd24cc422003-03-27 12:51:24 +0000340 u16 flags; /* Flags associated with this database */
drh90f5ecb2004-07-22 01:19:35 +0000341 u8 inTrans; /* 0: not writable. 1: Transaction. 2: Checkpoint */
danielk197791cf71b2004-06-26 06:37:06 +0000342 u8 safety_level; /* How aggressive at synching data to disk */
343 int cache_size; /* Number of pages to use in the cache */
drh4794f732004-11-05 17:17:50 +0000344 Table *pSeqTab; /* The sqlite_sequence table used by AUTOINCREMENT */
345 void *pAux; /* Auxiliary data. Usually NULL */
drh4d189ca2004-02-12 18:46:38 +0000346 void (*xFreeAux)(void*); /* Routine to free pAux */
drh001bbcb2003-03-19 03:14:00 +0000347};
drh75897232000-05-29 14:26:00 +0000348
349/*
drh8bf8dc92003-05-17 17:35:10 +0000350** These macros can be used to test, set, or clear bits in the
351** Db.flags field.
352*/
353#define DbHasProperty(D,I,P) (((D)->aDb[I].flags&(P))==(P))
354#define DbHasAnyProperty(D,I,P) (((D)->aDb[I].flags&(P))!=0)
355#define DbSetProperty(D,I,P) (D)->aDb[I].flags|=(P)
356#define DbClearProperty(D,I,P) (D)->aDb[I].flags&=~(P)
357
358/*
359** Allowed values for the DB.flags field.
360**
drh8bf8dc92003-05-17 17:35:10 +0000361** The DB_SchemaLoaded flag is set after the database schema has been
362** read into internal hash tables.
363**
364** DB_UnresetViews means that one or more views have column names that
365** have been filled out. If the schema changes, these column names might
366** changes and so the view will need to be reset.
367*/
drh124b27e2004-06-19 16:06:10 +0000368#define DB_SchemaLoaded 0x0001 /* The schema has been loaded */
369#define DB_UnresetViews 0x0002 /* Some views have defined column names */
drh8bf8dc92003-05-17 17:35:10 +0000370
danielk1977dc8453f2004-06-12 00:42:34 +0000371#define SQLITE_UTF16NATIVE (SQLITE_BIGENDIAN?SQLITE_UTF16BE:SQLITE_UTF16LE)
drh8bf8dc92003-05-17 17:35:10 +0000372
373/*
drhc9b84a12002-06-20 11:36:48 +0000374** Each database is an instance of the following structure.
375**
rdcb0c374f2004-02-20 22:53:38 +0000376** The sqlite.lastRowid records the last insert rowid generated by an
377** insert statement. Inserts on views do not affect its value. Each
378** trigger has its own context, so that lastRowid can be updated inside
379** triggers as usual. The previous value will be restored once the trigger
380** exits. Upon entering a before or instead of trigger, lastRowid is no
381** longer (since after version 2.8.12) reset to -1.
382**
383** The sqlite.nChange does not count changes within triggers and keeps no
danielk19776f8a5032004-05-10 10:34:51 +0000384** context. It is reset at start of sqlite3_exec.
rdcb0c374f2004-02-20 22:53:38 +0000385** The sqlite.lsChange represents the number of changes made by the last
386** insert, update, or delete statement. It remains constant throughout the
387** length of a statement and is then updated by OP_SetCounts. It keeps a
388** context stack just like lastRowid so that the count of changes
389** within a trigger is not seen outside the trigger. Changes to views do not
390** affect the value of lsChange.
391** The sqlite.csChange keeps track of the number of current changes (since
392** the last statement) and is used to update sqlite_lsChange.
danielk19776622cce2004-05-20 11:00:52 +0000393**
394** The member variables sqlite.errCode, sqlite.zErrMsg and sqlite.zErrMsg16
395** store the most recent error code and, if applicable, string. The
396** internal function sqlite3Error() is used to set these variables
397** consistently.
drh75897232000-05-29 14:26:00 +0000398*/
drh9bb575f2004-09-06 17:24:11 +0000399struct sqlite3 {
drh001bbcb2003-03-19 03:14:00 +0000400 int nDb; /* Number of backends currently in use */
401 Db *aDb; /* All backends */
drh5e00f6c2001-09-13 13:46:56 +0000402 int flags; /* Miscellanous flags. See below */
drhfcd35c72005-05-21 02:48:08 +0000403 int errCode; /* Most recent error code (SQLITE_*) */
404 u8 enc; /* Text encoding for this database. */
405 u8 autoCommit; /* The auto-commit flag. */
drh973b6e32003-02-12 14:09:42 +0000406 u8 file_format; /* What file format version is this database? */
drh90f5ecb2004-07-22 01:19:35 +0000407 u8 temp_store; /* 1: file 2: memory 0: default */
drh5e00f6c2001-09-13 13:46:56 +0000408 int nTable; /* Number of tables in the database */
drhd3d39e92004-05-20 22:16:29 +0000409 CollSeq *pDfltColl; /* The default collating sequence (BINARY) */
drhf328bc82004-05-10 23:29:49 +0000410 i64 lastRowid; /* ROWID of most recent insert (see above) */
411 i64 priorNewRowid; /* Last randomly generated ROWID */
drh247be432002-05-10 05:44:55 +0000412 int magic; /* Magic number for detect library misuse */
danielk1977b28af712004-06-21 06:50:26 +0000413 int nChange; /* Value returned by sqlite3_changes() */
414 int nTotalChange; /* Value returned by sqlite3_total_changes() */
415 struct sqlite3InitInfo { /* Information used during initialization */
416 int iDb; /* When back is being initialized */
417 int newTnum; /* Rootpage of table being initialized */
418 u8 busy; /* TRUE if currently initializing */
drh1d85d932004-02-14 23:05:52 +0000419 } init;
drh326dce72003-01-29 14:06:07 +0000420 struct Vdbe *pVdbe; /* List of active virtual machines */
danielk19771d850a72004-05-31 08:26:49 +0000421 int activeVdbeCnt; /* Number of vdbes currently executing */
drh18de4822003-01-16 16:28:53 +0000422 void (*xTrace)(void*,const char*); /* Trace function */
423 void *pTraceArg; /* Argument to the trace function */
drhfcd35c72005-05-21 02:48:08 +0000424 void *pCommitArg; /* Argument to xCommitCallback() */
425 int (*xCommitCallback)(void*);/* Invoked at every commit. */
426 void(*xCollNeeded)(void*,sqlite3*,int eTextRep,const char*);
427 void(*xCollNeeded16)(void*,sqlite3*,int eTextRep,const void*);
428 void *pCollNeededArg;
429 sqlite3_value *pValue; /* Value used for transient conversions */
430 sqlite3_value *pErr; /* Most recent error message */
431 char *zErrMsg; /* Most recent error message (UTF-8 encoded) */
432 char *zErrMsg16; /* Most recent error message (UTF-16 encoded) */
drhed6c8672003-01-12 18:02:16 +0000433#ifndef SQLITE_OMIT_AUTHORIZATION
drhe22a3342003-04-22 20:30:37 +0000434 int (*xAuth)(void*,int,const char*,const char*,const char*,const char*);
435 /* Access authorization function */
drhed6c8672003-01-12 18:02:16 +0000436 void *pAuthArg; /* 1st argument to the access auth function */
437#endif
danielk1977348bb5d2003-10-18 09:37:26 +0000438#ifndef SQLITE_OMIT_PROGRESS_CALLBACK
439 int (*xProgress)(void *); /* The progress callback */
440 void *pProgressArg; /* Argument to the progress callback */
441 int nProgressOps; /* Number of opcodes for progress callback */
442#endif
danielk19776b456a22005-03-21 04:04:02 +0000443#ifndef SQLITE_OMIT_GLOBALRECOVER
444 sqlite3 *pNext; /* Linked list of open db handles. */
445#endif
drhfcd35c72005-05-21 02:48:08 +0000446 Hash aFunc; /* All functions that can be in SQL exprs */
447 Hash aCollSeq; /* All collating sequences */
448 BusyHandler busyHandler; /* Busy callback */
drh97903fe2005-05-24 20:19:57 +0000449 int busyTimeout; /* Busy handler timeout, in msec */
drhfcd35c72005-05-21 02:48:08 +0000450 Db aDbStatic[2]; /* Static space for the 2 default backends */
danielk19777e900ab2005-05-23 04:51:01 +0000451#ifdef SQLITE_SSE
452 sqlite3_stmt *pFetch; /* Used by SSE to fetch stored statements */
453#endif
drh75897232000-05-29 14:26:00 +0000454};
455
456/*
drh8bf8dc92003-05-17 17:35:10 +0000457** Possible values for the sqlite.flags and or Db.flags fields.
458**
459** On sqlite.flags, the SQLITE_InTrans value means that we have
460** executed a BEGIN. On Db.flags, SQLITE_InTrans means a statement
461** transaction is active on that particular database file.
drh75897232000-05-29 14:26:00 +0000462*/
drh5e00f6c2001-09-13 13:46:56 +0000463#define SQLITE_VdbeTrace 0x00000001 /* True to trace VDBE execution */
464#define SQLITE_Initialized 0x00000002 /* True after initialization */
465#define SQLITE_Interrupt 0x00000004 /* Cancel current operation */
466#define SQLITE_InTrans 0x00000008 /* True if in a transaction */
467#define SQLITE_InternChanges 0x00000010 /* Uncommitted Hash table changes */
drh382c0242001-10-06 16:33:02 +0000468#define SQLITE_FullColNames 0x00000020 /* Show full column names on SELECT */
drhfcabd462004-02-20 14:50:58 +0000469#define SQLITE_ShortColNames 0x00000040 /* Show short columns names */
470#define SQLITE_CountRows 0x00000080 /* Count rows changed by INSERT, */
drh1bee3d72001-10-15 00:44:35 +0000471 /* DELETE, or UPDATE and return */
472 /* the count using a callback. */
drhfcabd462004-02-20 14:50:58 +0000473#define SQLITE_NullCallback 0x00000100 /* Invoke the callback once if the */
drh6a535342001-10-19 16:44:56 +0000474 /* result set is empty */
drh35d4c2f2004-06-10 01:30:59 +0000475#define SQLITE_SqlTrace 0x00000200 /* Debug print SQL as it executes */
476#define SQLITE_VdbeListing 0x00000400 /* Debug listings of VDBE programs */
drhf4040832004-10-22 20:29:21 +0000477#define SQLITE_WriteSchema 0x00000800 /* OK to update SQLITE_MASTER */
drh7bec5052005-02-06 02:45:41 +0000478#define SQLITE_NoReadlock 0x00001000 /* Readlocks are omitted when
479 ** accessing read-only databases */
drh58b95762000-06-02 01:17:37 +0000480
481/*
drh247be432002-05-10 05:44:55 +0000482** Possible values for the sqlite.magic field.
483** The numbers are obtained at random and have no special meaning, other
484** than being distinct from one another.
485*/
486#define SQLITE_MAGIC_OPEN 0xa029a697 /* Database is open */
487#define SQLITE_MAGIC_CLOSED 0x9f3c2d33 /* Database is closed */
488#define SQLITE_MAGIC_BUSY 0xf03b7906 /* Database currently in use */
489#define SQLITE_MAGIC_ERROR 0xb5357930 /* An SQLITE_MISUSE error occurred */
490
491/*
drh0bce8352002-02-28 00:41:10 +0000492** Each SQL function is defined by an instance of the following
493** structure. A pointer to this structure is stored in the sqlite.aFunc
drh8e0a2f92002-02-23 23:45:45 +0000494** hash table. When multiple functions have the same name, the hash table
495** points to a linked list of these structures.
drh28037572000-08-02 13:47:41 +0000496*/
drh0bce8352002-02-28 00:41:10 +0000497struct FuncDef {
drhf9b596e2004-05-26 16:54:42 +0000498 char *zName; /* SQL name of the function */
499 int nArg; /* Number of arguments. -1 means unlimited */
danielk1977d8123362004-06-12 09:25:12 +0000500 u8 iPrefEnc; /* Preferred text encoding (SQLITE_UTF8, 16LE, 16BE) */
drhf9b596e2004-05-26 16:54:42 +0000501 void *pUserData; /* User data parameter */
502 FuncDef *pNext; /* Next function with same name */
503 void (*xFunc)(sqlite3_context*,int,sqlite3_value**); /* Regular function */
504 void (*xStep)(sqlite3_context*,int,sqlite3_value**); /* Aggregate step */
505 void (*xFinalize)(sqlite3_context*); /* Aggregate finializer */
danielk1977dc1bdc42004-06-11 10:51:27 +0000506 u8 needCollSeq; /* True if sqlite3GetFuncCollSeq() might be called */
drh8e0a2f92002-02-23 23:45:45 +0000507};
drh28037572000-08-02 13:47:41 +0000508
509/*
drh967e8b72000-06-21 13:59:10 +0000510** information about each column of an SQL table is held in an instance
drh7020f652000-06-03 18:06:52 +0000511** of this structure.
512*/
513struct Column {
drh967e8b72000-06-21 13:59:10 +0000514 char *zName; /* Name of this column */
danielk19777977a172004-11-09 12:44:37 +0000515 Expr *pDflt; /* Default value of this column */
drh382c0242001-10-06 16:33:02 +0000516 char *zType; /* Data type for this column */
drha9fd84b2004-05-18 23:21:35 +0000517 CollSeq *pColl; /* Collating sequence. If NULL, use the default */
drh4a324312001-12-21 14:30:42 +0000518 u8 notNull; /* True if there is a NOT NULL constraint */
drh78100cc2003-08-23 22:40:53 +0000519 u8 isPrimKey; /* True if this column is part of the PRIMARY KEY */
danielk1977a37cdde2004-05-16 11:15:36 +0000520 char affinity; /* One of the SQLITE_AFF_... values */
drh7020f652000-06-03 18:06:52 +0000521};
522
523/*
drha9fd84b2004-05-18 23:21:35 +0000524** A "Collating Sequence" is defined by an instance of the following
danielk19770202b292004-06-09 09:55:16 +0000525** structure. Conceptually, a collating sequence consists of a name and
526** a comparison routine that defines the order of that sequence.
drha9fd84b2004-05-18 23:21:35 +0000527**
danielk19770202b292004-06-09 09:55:16 +0000528** There may two seperate implementations of the collation function, one
529** that processes text in UTF-8 encoding (CollSeq.xCmp) and another that
530** processes text encoded in UTF-16 (CollSeq.xCmp16), using the machine
531** native byte order. When a collation sequence is invoked, SQLite selects
532** the version that will require the least expensive encoding
533** transalations, if any.
534**
535** The CollSeq.pUser member variable is an extra parameter that passed in
536** as the first argument to the UTF-8 comparison function, xCmp.
537** CollSeq.pUser16 is the equivalent for the UTF-16 comparison function,
538** xCmp16.
539**
540** If both CollSeq.xCmp and CollSeq.xCmp16 are NULL, it means that the
541** collating sequence is undefined. Indices built on an undefined
542** collating sequence may not be read or written.
drha9fd84b2004-05-18 23:21:35 +0000543*/
544struct CollSeq {
danielk19770202b292004-06-09 09:55:16 +0000545 char *zName; /* Name of the collating sequence, UTF-8 encoded */
danielk1977466be562004-06-10 02:16:01 +0000546 u8 enc; /* Text encoding handled by xCmp() */
drha9fd84b2004-05-18 23:21:35 +0000547 void *pUser; /* First argument to xCmp() */
danielk19770202b292004-06-09 09:55:16 +0000548 int (*xCmp)(void*,int, const void*, int, const void*);
drha9fd84b2004-05-18 23:21:35 +0000549};
550
551/*
drhd3d39e92004-05-20 22:16:29 +0000552** A sort order can be either ASC or DESC.
drh8e2ca022002-06-17 17:07:19 +0000553*/
drh8e2ca022002-06-17 17:07:19 +0000554#define SQLITE_SO_ASC 0 /* Sort in ascending order */
drhd3d39e92004-05-20 22:16:29 +0000555#define SQLITE_SO_DESC 1 /* Sort in ascending order */
drh8e2ca022002-06-17 17:07:19 +0000556
557/*
danielk1977a37cdde2004-05-16 11:15:36 +0000558** Column affinity types.
559*/
560#define SQLITE_AFF_INTEGER 'i'
561#define SQLITE_AFF_NUMERIC 'n'
562#define SQLITE_AFF_TEXT 't'
563#define SQLITE_AFF_NONE 'o'
564
565
566/*
drh22f70c32002-02-18 01:17:00 +0000567** Each SQL table is represented in memory by an instance of the
568** following structure.
569**
drhd24cc422003-03-27 12:51:24 +0000570** Table.zName is the name of the table. The case of the original
drh22f70c32002-02-18 01:17:00 +0000571** CREATE TABLE statement is stored, but case is not significant for
572** comparisons.
573**
drhd24cc422003-03-27 12:51:24 +0000574** Table.nCol is the number of columns in this table. Table.aCol is a
drh22f70c32002-02-18 01:17:00 +0000575** pointer to an array of Column structures, one for each column.
576**
drhd24cc422003-03-27 12:51:24 +0000577** If the table has an INTEGER PRIMARY KEY, then Table.iPKey is the index of
578** the column that is that key. Otherwise Table.iPKey is negative. Note
drh22f70c32002-02-18 01:17:00 +0000579** that the datatype of the PRIMARY KEY must be INTEGER for this field to
580** be set. An INTEGER PRIMARY KEY is used as the rowid for each row of
581** the table. If a table has no INTEGER PRIMARY KEY, then a random rowid
drhd24cc422003-03-27 12:51:24 +0000582** is generated for each row of the table. Table.hasPrimKey is true if
drh22f70c32002-02-18 01:17:00 +0000583** the table has any PRIMARY KEY, INTEGER or otherwise.
584**
drhd24cc422003-03-27 12:51:24 +0000585** Table.tnum is the page number for the root BTree page of the table in the
586** database file. If Table.iDb is the index of the database table backend
587** in sqlite.aDb[]. 0 is for the main database and 1 is for the file that
588** holds temporary tables and indices. If Table.isTransient
drh22f70c32002-02-18 01:17:00 +0000589** is true, then the table is stored in a file that is automatically deleted
drhd24cc422003-03-27 12:51:24 +0000590** when the VDBE cursor to the table is closed. In this case Table.tnum
drh22f70c32002-02-18 01:17:00 +0000591** refers VDBE cursor number that holds the table open, not to the root
592** page number. Transient tables are used to hold the results of a
593** sub-query that appears instead of a real table name in the FROM clause
594** of a SELECT statement.
drh75897232000-05-29 14:26:00 +0000595*/
596struct Table {
drh967e8b72000-06-21 13:59:10 +0000597 char *zName; /* Name of the table */
drh967e8b72000-06-21 13:59:10 +0000598 int nCol; /* Number of columns in this table */
599 Column *aCol; /* Information about each column */
drhc8392582001-12-31 02:48:51 +0000600 int iPKey; /* If not less then 0, use aCol[iPKey] as the primary key */
drh967e8b72000-06-21 13:59:10 +0000601 Index *pIndex; /* List of SQL indexes on this table. */
drh22f70c32002-02-18 01:17:00 +0000602 int tnum; /* Root BTree node for this table (see note above) */
drha76b5df2002-02-23 02:32:10 +0000603 Select *pSelect; /* NULL for tables. Points to definition if a view. */
drh717e6402001-09-27 03:22:32 +0000604 u8 readOnly; /* True if this table should not be written by the user */
drhd24cc422003-03-27 12:51:24 +0000605 u8 iDb; /* Index into sqlite.aDb[] of the backend for this table */
drh22f70c32002-02-18 01:17:00 +0000606 u8 isTransient; /* True if automatically deleted when VDBE finishes */
drh4a324312001-12-21 14:30:42 +0000607 u8 hasPrimKey; /* True if there exists a primary key */
drh9cfcf5d2002-01-29 18:41:24 +0000608 u8 keyConf; /* What to do in case of uniqueness conflict on iPKey */
drh205f48e2004-11-05 00:43:11 +0000609 u8 autoInc; /* True if the integer primary key is autoincrement */
danielk1977c3f9bad2002-05-15 08:30:12 +0000610 Trigger *pTrigger; /* List of SQL triggers on this table */
drhc2eef3b2002-08-31 18:53:06 +0000611 FKey *pFKey; /* Linked list of all foreign keys in this table */
danielk19773d1bfea2004-05-14 11:00:53 +0000612 char *zColAff; /* String defining the affinity of each column */
danielk197719a8e7e2005-03-17 05:03:38 +0000613#ifndef SQLITE_OMIT_ALTERTABLE
614 int addColOffset; /* Offset in CREATE TABLE statement to add a new column */
615#endif
drh75897232000-05-29 14:26:00 +0000616};
617
618/*
drhc2eef3b2002-08-31 18:53:06 +0000619** Each foreign key constraint is an instance of the following structure.
620**
621** A foreign key is associated with two tables. The "from" table is
622** the table that contains the REFERENCES clause that creates the foreign
623** key. The "to" table is the table that is named in the REFERENCES clause.
624** Consider this example:
625**
626** CREATE TABLE ex1(
627** a INTEGER PRIMARY KEY,
628** b INTEGER CONSTRAINT fk1 REFERENCES ex2(x)
629** );
630**
631** For foreign key "fk1", the from-table is "ex1" and the to-table is "ex2".
632**
633** Each REFERENCES clause generates an instance of the following structure
634** which is attached to the from-table. The to-table need not exist when
635** the from-table is created. The existance of the to-table is not checked
636** until an attempt is made to insert data into the from-table.
637**
drhea1ba172003-04-20 00:00:23 +0000638** The sqlite.aFKey hash table stores pointers to this structure
drhc2eef3b2002-08-31 18:53:06 +0000639** given the name of a to-table. For each to-table, all foreign keys
640** associated with that table are on a linked list using the FKey.pNextTo
641** field.
642*/
643struct FKey {
644 Table *pFrom; /* The table that constains the REFERENCES clause */
645 FKey *pNextFrom; /* Next foreign key in pFrom */
646 char *zTo; /* Name of table that the key points to */
647 FKey *pNextTo; /* Next foreign key that points to zTo */
648 int nCol; /* Number of columns in this key */
649 struct sColMap { /* Mapping of columns in pFrom to columns in zTo */
650 int iFrom; /* Index of column in pFrom */
651 char *zCol; /* Name of column in zTo. If 0 use PRIMARY KEY */
652 } *aCol; /* One entry for each of nCol column s */
653 u8 isDeferred; /* True if constraint checking is deferred till COMMIT */
654 u8 updateConf; /* How to resolve conflicts that occur on UPDATE */
655 u8 deleteConf; /* How to resolve conflicts that occur on DELETE */
656 u8 insertConf; /* How to resolve conflicts that occur on INSERT */
657};
658
659/*
660** SQLite supports many different ways to resolve a contraint
drh22f70c32002-02-18 01:17:00 +0000661** error. ROLLBACK processing means that a constraint violation
drh0bd1f4e2002-06-06 18:54:39 +0000662** causes the operation in process to fail and for the current transaction
drh1c928532002-01-31 15:54:21 +0000663** to be rolled back. ABORT processing means the operation in process
664** fails and any prior changes from that one operation are backed out,
665** but the transaction is not rolled back. FAIL processing means that
666** the operation in progress stops and returns an error code. But prior
667** changes due to the same operation are not backed out and no rollback
668** occurs. IGNORE means that the particular row that caused the constraint
669** error is not inserted or updated. Processing continues and no error
670** is returned. REPLACE means that preexisting database rows that caused
671** a UNIQUE constraint violation are removed so that the new insert or
672** update can proceed. Processing continues and no error is reported.
drhc2eef3b2002-08-31 18:53:06 +0000673**
674** RESTRICT, SETNULL, and CASCADE actions apply only to foreign keys.
675** RESTRICT is the same as ABORT for IMMEDIATE foreign keys and the
676** same as ROLLBACK for DEFERRED keys. SETNULL means that the foreign
677** key is set to NULL. CASCADE means that a DELETE or UPDATE of the
678** referenced table row is propagated into the row that holds the
679** foreign key.
drh1c928532002-01-31 15:54:21 +0000680**
drh968af522003-02-11 14:55:40 +0000681** The following symbolic values are used to record which type
drh1c928532002-01-31 15:54:21 +0000682** of action to take.
drh9cfcf5d2002-01-29 18:41:24 +0000683*/
drh1c928532002-01-31 15:54:21 +0000684#define OE_None 0 /* There is no constraint to check */
685#define OE_Rollback 1 /* Fail the operation and rollback the transaction */
686#define OE_Abort 2 /* Back out changes but do no rollback transaction */
687#define OE_Fail 3 /* Stop the operation but leave all prior changes */
688#define OE_Ignore 4 /* Ignore the error. Do not do the INSERT or UPDATE */
689#define OE_Replace 5 /* Delete existing record, then do INSERT or UPDATE */
drhc2eef3b2002-08-31 18:53:06 +0000690
691#define OE_Restrict 6 /* OE_Abort for IMMEDIATE, OE_Rollback for DEFERRED */
692#define OE_SetNull 7 /* Set the foreign key value to NULL */
693#define OE_SetDflt 8 /* Set the foreign key value to its default */
694#define OE_Cascade 9 /* Cascade the changes */
695
696#define OE_Default 99 /* Do whatever the default action is */
drh9cfcf5d2002-01-29 18:41:24 +0000697
drhd3d39e92004-05-20 22:16:29 +0000698
699/*
700** An instance of the following structure is passed as the first
701** argument to sqlite3VdbeKeyCompare and is used to control the
702** comparison of the two index keys.
703**
704** If the KeyInfo.incrKey value is true and the comparison would
drh7e627792005-04-29 02:10:00 +0000705** otherwise be equal, then return a result as if the second key
706** were larger.
drhd3d39e92004-05-20 22:16:29 +0000707*/
708struct KeyInfo {
danielk1977b1bc9532004-05-22 03:05:33 +0000709 u8 enc; /* Text encoding - one of the TEXT_Utf* values */
drhd3d39e92004-05-20 22:16:29 +0000710 u8 incrKey; /* Increase 2nd key by epsilon before comparison */
711 int nField; /* Number of entries in aColl[] */
drhffbc3082004-05-21 01:29:06 +0000712 u8 *aSortOrder; /* If defined an aSortOrder[i] is true, sort DESC */
drhd3d39e92004-05-20 22:16:29 +0000713 CollSeq *aColl[1]; /* Collating sequence for each term of the key */
714};
715
drh9cfcf5d2002-01-29 18:41:24 +0000716/*
drh66b89c82000-11-28 20:47:17 +0000717** Each SQL index is represented in memory by an
drh75897232000-05-29 14:26:00 +0000718** instance of the following structure.
drh967e8b72000-06-21 13:59:10 +0000719**
720** The columns of the table that are to be indexed are described
721** by the aiColumn[] field of this structure. For example, suppose
722** we have the following table and index:
723**
724** CREATE TABLE Ex1(c1 int, c2 int, c3 text);
725** CREATE INDEX Ex2 ON Ex1(c3,c1);
726**
727** In the Table structure describing Ex1, nCol==3 because there are
728** three columns in the table. In the Index structure describing
729** Ex2, nColumn==2 since 2 of the 3 columns of Ex1 are indexed.
730** The value of aiColumn is {2, 0}. aiColumn[0]==2 because the
731** first column to be indexed (c3) has an index of 2 in Ex1.aCol[].
732** The second column to be indexed (c1) has an index of 0 in
733** Ex1.aCol[], hence Ex2.aiColumn[1]==0.
drhea1ba172003-04-20 00:00:23 +0000734**
735** The Index.onError field determines whether or not the indexed columns
736** must be unique and what to do if they are not. When Index.onError=OE_None,
737** it means this is not a unique index. Otherwise it is a unique index
738** and the value of Index.onError indicate the which conflict resolution
739** algorithm to employ whenever an attempt is made to insert a non-unique
740** element.
drh75897232000-05-29 14:26:00 +0000741*/
742struct Index {
drh967e8b72000-06-21 13:59:10 +0000743 char *zName; /* Name of this index */
drh967e8b72000-06-21 13:59:10 +0000744 int nColumn; /* Number of columns in the table used by this index */
745 int *aiColumn; /* Which columns are used by this index. 1st is 0 */
746 Table *pTable; /* The SQL table being indexed */
drhbe0072d2001-09-13 14:46:09 +0000747 int tnum; /* Page containing root of this index in database file */
drh9cfcf5d2002-01-29 18:41:24 +0000748 u8 onError; /* OE_Abort, OE_Ignore, OE_Replace, or OE_None */
drh485b39b2002-07-13 03:11:52 +0000749 u8 autoIndex; /* True if is automatically created (ex: by UNIQUE) */
drhd24cc422003-03-27 12:51:24 +0000750 u8 iDb; /* Index in sqlite.aDb[] of where this index is stored */
danielk1977a37cdde2004-05-16 11:15:36 +0000751 char *zColAff; /* String defining the affinity of each column */
drh967e8b72000-06-21 13:59:10 +0000752 Index *pNext; /* The next index associated with the same table */
drhd3d39e92004-05-20 22:16:29 +0000753 KeyInfo keyInfo; /* Info on how to order keys. MUST BE LAST */
drh75897232000-05-29 14:26:00 +0000754};
755
756/*
757** Each token coming out of the lexer is an instance of
drh4b59ab52002-08-24 18:24:51 +0000758** this structure. Tokens are also used as part of an expression.
drh4efc4752004-01-16 15:55:37 +0000759**
760** Note if Token.z==0 then Token.dyn and Token.n are undefined and
761** may contain random values. Do not make any assuptions about Token.dyn
762** and Token.n when Token.z==0.
drh75897232000-05-29 14:26:00 +0000763*/
764struct Token {
drh4c755c02004-08-08 20:22:17 +0000765 const unsigned char *z; /* Text of the token. Not NULL-terminated! */
766 unsigned dyn : 1; /* True for malloced memory, false for static */
767 unsigned n : 31; /* Number of characters in this token */
drh75897232000-05-29 14:26:00 +0000768};
769
770/*
771** Each node of an expression in the parse tree is an instance
drh22f70c32002-02-18 01:17:00 +0000772** of this structure.
773**
774** Expr.op is the opcode. The integer parser token codes are reused
775** as opcodes here. For example, the parser defines TK_GE to be an integer
776** code representing the ">=" operator. This same integer code is reused
777** to represent the greater-than-or-equal-to operator in the expression
778** tree.
779**
780** Expr.pRight and Expr.pLeft are subexpressions. Expr.pList is a list
781** of argument if the expression is a function.
782**
drh4b59ab52002-08-24 18:24:51 +0000783** Expr.token is the operator token for this node. For some expressions
784** that have subexpressions, Expr.token can be the complete text that gave
785** rise to the Expr. In the latter case, the token is marked as being
786** a compound token.
drh22f70c32002-02-18 01:17:00 +0000787**
788** An expression of the form ID or ID.ID refers to a column in a table.
789** For such expressions, Expr.op is set to TK_COLUMN and Expr.iTable is
790** the integer cursor number of a VDBE cursor pointing to that table and
791** Expr.iColumn is the column number for the specific column. If the
792** expression is used as a result in an aggregate SELECT, then the
793** value is also stored in the Expr.iAgg column in the aggregate so that
794** it can be accessed after all aggregates are computed.
795**
796** If the expression is a function, the Expr.iTable is an integer code
drh7c972de2003-09-06 22:18:07 +0000797** representing which function. If the expression is an unbound variable
798** marker (a question mark character '?' in the original SQL) then the
799** Expr.iTable holds the index number for that variable.
drh22f70c32002-02-18 01:17:00 +0000800**
drh1398ad32005-01-19 23:24:50 +0000801** If the expression is a subquery then Expr.iColumn holds an integer
802** register number containing the result of the subquery. If the
803** subquery gives a constant result, then iTable is -1. If the subquery
804** gives a different answer at different times during statement processing
805** then iTable is the address of a subroutine that computes the subquery.
806**
drh22f70c32002-02-18 01:17:00 +0000807** The Expr.pSelect field points to a SELECT statement. The SELECT might
808** be the right operand of an IN operator. Or, if a scalar SELECT appears
809** in an expression the opcode is TK_SELECT and Expr.pSelect is the only
810** operand.
danielk1977aee18ef2005-03-09 12:26:50 +0000811**
812** If the Expr is of type OP_Column, and the table it is selecting from
813** is a disk table or the "old.*" pseudo-table, then pTab points to the
814** corresponding table definition.
drh75897232000-05-29 14:26:00 +0000815*/
816struct Expr {
drh1cc093c2002-06-24 22:01:57 +0000817 u8 op; /* Operation performed by this node */
drha9fd84b2004-05-18 23:21:35 +0000818 char affinity; /* The affinity of the column or 0 if not a column */
drhb5a20d32003-04-23 12:25:23 +0000819 u8 iDb; /* Database referenced by this expression */
drhe22a3342003-04-22 20:30:37 +0000820 u8 flags; /* Various flags. See below */
drhf2bc0132004-10-04 13:19:23 +0000821 CollSeq *pColl; /* The collation type of the column or 0 */
drh75897232000-05-29 14:26:00 +0000822 Expr *pLeft, *pRight; /* Left and right subnodes */
drhd99f7062002-06-08 23:25:08 +0000823 ExprList *pList; /* A list of expressions used as function arguments
824 ** or in "<expr> IN (<expr-list)" */
drh75897232000-05-29 14:26:00 +0000825 Token token; /* An operand token */
drh6977fea2002-10-22 23:38:04 +0000826 Token span; /* Complete text of the expression */
drh967e8b72000-06-21 13:59:10 +0000827 int iTable, iColumn; /* When op==TK_COLUMN, then this expr node means the
drh8e2ca022002-06-17 17:07:19 +0000828 ** iColumn-th field of the iTable-th table. */
danielk1977a58fdfb2005-02-08 07:50:40 +0000829 int iAgg; /* When op==TK_COLUMN and pParse->fillAgg==FALSE, pull
drh967e8b72000-06-21 13:59:10 +0000830 ** result from the iAgg-th element of the aggregator */
danielk1977a58fdfb2005-02-08 07:50:40 +0000831 int iAggCtx; /* The value to pass as P1 of OP_AggGet. */
drhd99f7062002-06-08 23:25:08 +0000832 Select *pSelect; /* When the expression is a sub-select. Also the
833 ** right side of "<expr> IN (<select>)" */
danielk1977aee18ef2005-03-09 12:26:50 +0000834 Table *pTab; /* Table for OP_Column expressions. */
drh75897232000-05-29 14:26:00 +0000835};
836
837/*
drh1f162302002-10-27 19:35:33 +0000838** The following are the meanings of bits in the Expr.flags field.
839*/
840#define EP_FromJoin 0x0001 /* Originated in ON or USING clause of a join */
drh626a8792005-01-17 22:08:19 +0000841#define EP_Agg 0x0002 /* Contains one or more aggregate functions */
842#define EP_Resolved 0x0004 /* IDs have been resolved to COLUMNs */
drh73b211a2005-01-18 04:00:42 +0000843#define EP_Error 0x0008 /* Expression contains one or more errors */
drh51522cd2005-01-20 13:36:19 +0000844#define EP_Not 0x0010 /* Operator preceeded by NOT */
danielk1977b3bce662005-01-29 08:32:43 +0000845#define EP_VarSelect 0x0020 /* pSelect is correlated, not constant */
drh1f162302002-10-27 19:35:33 +0000846
847/*
848** These macros can be used to test, set, or clear bits in the
849** Expr.flags field.
850*/
851#define ExprHasProperty(E,P) (((E)->flags&(P))==(P))
852#define ExprHasAnyProperty(E,P) (((E)->flags&(P))!=0)
853#define ExprSetProperty(E,P) (E)->flags|=(P)
854#define ExprClearProperty(E,P) (E)->flags&=~(P)
855
856/*
drh75897232000-05-29 14:26:00 +0000857** A list of expressions. Each expression may optionally have a
858** name. An expr/name combination can be used in several ways, such
859** as the list of "expr AS ID" fields following a "SELECT" or in the
860** list of "ID = expr" items in an UPDATE. A list of expressions can
drhad3cab52002-05-24 02:04:32 +0000861** also be used as the argument to a function, in which case the a.zName
drh75897232000-05-29 14:26:00 +0000862** field is not used.
863*/
864struct ExprList {
865 int nExpr; /* Number of expressions on the list */
drh4305d102003-07-30 12:34:12 +0000866 int nAlloc; /* Number of entries allocated below */
drh6d4abfb2001-10-22 02:58:08 +0000867 struct ExprList_item {
drh75897232000-05-29 14:26:00 +0000868 Expr *pExpr; /* The list of expressions */
869 char *zName; /* Token associated with this expression */
drh8e2ca022002-06-17 17:07:19 +0000870 u8 sortOrder; /* 1 for DESC or 0 for ASC */
871 u8 isAgg; /* True if this is an aggregate like count(*) */
872 u8 done; /* A flag to indicate when processing is finished */
drh75897232000-05-29 14:26:00 +0000873 } *a; /* One entry for each expression */
874};
875
876/*
drhad3cab52002-05-24 02:04:32 +0000877** An instance of this structure can hold a simple list of identifiers,
878** such as the list "a,b,c" in the following statements:
879**
880** INSERT INTO t(a,b,c) VALUES ...;
881** CREATE INDEX idx ON t(a,b,c);
882** CREATE TRIGGER trig BEFORE UPDATE ON t(a,b,c) ...;
883**
884** The IdList.a.idx field is used when the IdList represents the list of
885** column names after a table name in an INSERT statement. In the statement
886**
887** INSERT INTO t(a,b,c) ...
888**
889** If "a" is the k-th column of table "t", then IdList.a[0].idx==k.
drh75897232000-05-29 14:26:00 +0000890*/
891struct IdList {
892 int nId; /* Number of identifiers on the list */
drh4305d102003-07-30 12:34:12 +0000893 int nAlloc; /* Number of entries allocated for a[] below */
drh6d4abfb2001-10-22 02:58:08 +0000894 struct IdList_item {
drhad3cab52002-05-24 02:04:32 +0000895 char *zName; /* Name of the identifier */
drh967e8b72000-06-21 13:59:10 +0000896 int idx; /* Index in some Table.aCol[] of a column named zName */
drhad3cab52002-05-24 02:04:32 +0000897 } *a;
898};
899
900/*
drh51669862004-12-18 18:40:26 +0000901** The bitmask datatype defined below is used for various optimizations.
902*/
903typedef unsigned int Bitmask;
904
905/*
drhad3cab52002-05-24 02:04:32 +0000906** The following structure describes the FROM clause of a SELECT statement.
907** Each table or subquery in the FROM clause is a separate element of
908** the SrcList.a[] array.
drhd24cc422003-03-27 12:51:24 +0000909**
910** With the addition of multiple database support, the following structure
911** can also be used to describe a particular table such as the table that
912** is modified by an INSERT, DELETE, or UPDATE statement. In standard SQL,
913** such a table must be a simple name: ID. But in SQLite, the table can
914** now be identified by a database name, a dot, then the table name: ID.ID.
drhad3cab52002-05-24 02:04:32 +0000915*/
916struct SrcList {
drh939a16d2004-07-15 13:37:22 +0000917 i16 nSrc; /* Number of tables or subqueries in the FROM clause */
918 i16 nAlloc; /* Number of entries allocated in a[] below */
drhad3cab52002-05-24 02:04:32 +0000919 struct SrcList_item {
drh113088e2003-03-20 01:16:58 +0000920 char *zDatabase; /* Name of database holding this table */
drhad3cab52002-05-24 02:04:32 +0000921 char *zName; /* Name of the table */
922 char *zAlias; /* The "B" part of a "A AS B" phrase. zName is the "A" */
drhdaffd0e2001-04-11 14:28:42 +0000923 Table *pTab; /* An SQL table corresponding to zName */
924 Select *pSelect; /* A SELECT statement used in place of a table name */
drhad3cab52002-05-24 02:04:32 +0000925 int jointype; /* Type of join between this table and the next */
drh63eb5f22003-04-29 16:20:44 +0000926 int iCursor; /* The VDBE cursor number used to access this table */
drhad3cab52002-05-24 02:04:32 +0000927 Expr *pOn; /* The ON clause of a join */
928 IdList *pUsing; /* The USING clause of a join */
drh51669862004-12-18 18:40:26 +0000929 Bitmask colUsed; /* Bit N (1<<N) set if column N or pTab is used */
drh113088e2003-03-20 01:16:58 +0000930 } a[1]; /* One entry for each identifier on the list */
drh75897232000-05-29 14:26:00 +0000931};
932
933/*
drh01f3f252002-05-24 16:14:15 +0000934** Permitted values of the SrcList.a.jointype field
935*/
936#define JT_INNER 0x0001 /* Any kind of inner or cross join */
937#define JT_NATURAL 0x0002 /* True for a "natural" join */
drh195e6962002-05-25 00:18:20 +0000938#define JT_LEFT 0x0004 /* Left outer join */
939#define JT_RIGHT 0x0008 /* Right outer join */
drh01f3f252002-05-24 16:14:15 +0000940#define JT_OUTER 0x0010 /* The "OUTER" keyword is present */
941#define JT_ERROR 0x0020 /* unknown or unsupported join type */
942
943/*
drh6b563442001-11-07 16:48:26 +0000944** For each nested loop in a WHERE clause implementation, the WhereInfo
945** structure contains a single instance of this structure. This structure
946** is intended to be private the the where.c module and should not be
947** access or modified by other modules.
948*/
949struct WhereLevel {
950 int iMem; /* Memory cell used by this level */
drh9012bcb2004-12-19 00:11:35 +0000951 Index *pIdx; /* Index used. NULL if no index */
952 int iTabCur; /* The VDBE cursor used to access the table */
953 int iIdxCur; /* The VDBE cursor used to acesss pIdx */
drhacf3b982005-01-03 01:27:18 +0000954 int score; /* How well this index scored */
drh6b563442001-11-07 16:48:26 +0000955 int brk; /* Jump here to break out of the loop */
956 int cont; /* Jump here to continue with the next loop cycle */
957 int op, p1, p2; /* Opcode used to terminate the loop */
drhad2d8302002-05-24 20:31:36 +0000958 int iLeftJoin; /* Memory cell used to implement LEFT OUTER JOIN */
959 int top; /* First instruction of interior of the loop */
drhd99f7062002-06-08 23:25:08 +0000960 int inOp, inP1, inP2;/* Opcode used to implement an IN operator */
drhc045ec52002-12-04 20:01:06 +0000961 int bRev; /* Do the scan in the reverse direction */
drh6b563442001-11-07 16:48:26 +0000962};
963
964/*
drh75897232000-05-29 14:26:00 +0000965** The WHERE clause processing routine has two halves. The
966** first part does the start of the WHERE loop and the second
967** half does the tail of the WHERE loop. An instance of
968** this structure is returned by the first half and passed
969** into the second half to give some continuity.
970*/
971struct WhereInfo {
972 Parse *pParse;
drhad3cab52002-05-24 02:04:32 +0000973 SrcList *pTabList; /* List of tables in the join */
drh9012bcb2004-12-19 00:11:35 +0000974 int iTop; /* The very beginning of the WHERE loop */
drh19a775c2000-06-05 18:54:46 +0000975 int iContinue; /* Jump here to continue with next record */
976 int iBreak; /* Jump here to break out of the loop */
drh6b563442001-11-07 16:48:26 +0000977 int nLevel; /* Number of nested loop */
978 WhereLevel a[1]; /* Information about each nest loop in the WHERE */
drh75897232000-05-29 14:26:00 +0000979};
980
981/*
danielk1977b3bce662005-01-29 08:32:43 +0000982** A NameContext defines a context in which to resolve table and column
983** names. The context consists of a list of tables (the pSrcList) field and
984** a list of named expression (pEList). The named expression list may
985** be NULL. The pSrc corresponds to the FROM clause of a SELECT or
986** to the table being operated on by INSERT, UPDATE, or DELETE. The
987** pEList corresponds to the result set of a SELECT and is NULL for
988** other statements.
989**
990** NameContexts can be nested. When resolving names, the inner-most
991** context is searched first. If no match is found, the next outer
992** context is checked. If there is still no match, the next context
993** is checked. This process continues until either a match is found
994** or all contexts are check. When a match is found, the nRef member of
995** the context containing the match is incremented.
996**
997** Each subquery gets a new NameContext. The pNext field points to the
998** NameContext in the parent query. Thus the process of scanning the
999** NameContext list corresponds to searching through successively outer
1000** subqueries looking for a match.
1001*/
1002struct NameContext {
1003 Parse *pParse; /* The parser */
1004 SrcList *pSrcList; /* One or more tables used to resolve names */
1005 ExprList *pEList; /* Optional list of named expressions */
1006 int nRef; /* Number of names resolved by this context */
1007 int nErr; /* Number of errors encountered while resolving names */
1008 u8 allowAgg; /* Aggregate functions allowed here */
1009 u8 hasAgg;
1010 int nDepth; /* Depth of subquery recursion. 1 for no recursion */
1011 NameContext *pNext; /* Next outer name context. NULL for outermost */
1012};
1013
1014/*
drh9bb61fe2000-06-05 16:01:39 +00001015** An instance of the following structure contains all information
1016** needed to generate code for a single SELECT statement.
drha76b5df2002-02-23 02:32:10 +00001017**
drhd11d3822002-06-21 23:01:49 +00001018** nLimit is set to -1 if there is no LIMIT clause. nOffset is set to 0.
1019** If there is a LIMIT clause, the parser sets nLimit to the value of the
1020** limit and nOffset to the value of the offset (or 0 if there is not
1021** offset). But later on, nLimit and nOffset become the memory locations
1022** in the VDBE that record the limit and offset counters.
drh9bb61fe2000-06-05 16:01:39 +00001023*/
1024struct Select {
drh9bb61fe2000-06-05 16:01:39 +00001025 ExprList *pEList; /* The fields of the result */
drh7b58dae2003-07-20 01:16:46 +00001026 u8 op; /* One of: TK_UNION TK_ALL TK_INTERSECT TK_EXCEPT */
1027 u8 isDistinct; /* True if the DISTINCT keyword is present */
drhad3cab52002-05-24 02:04:32 +00001028 SrcList *pSrc; /* The FROM clause */
drh9bb61fe2000-06-05 16:01:39 +00001029 Expr *pWhere; /* The WHERE clause */
1030 ExprList *pGroupBy; /* The GROUP BY clause */
1031 Expr *pHaving; /* The HAVING clause */
1032 ExprList *pOrderBy; /* The ORDER BY clause */
drh967e8b72000-06-21 13:59:10 +00001033 Select *pPrior; /* Prior select in a compound select statement */
danielk1977a2dc3b12005-02-05 12:48:48 +00001034 Expr *pLimit; /* LIMIT expression. NULL means not used. */
1035 Expr *pOffset; /* OFFSET expression. NULL means not used. */
drh7b58dae2003-07-20 01:16:46 +00001036 int iLimit, iOffset; /* Memory registers holding LIMIT & OFFSET counters */
danielk1977dc1bdc42004-06-11 10:51:27 +00001037 IdList **ppOpenTemp; /* OP_OpenTemp addresses used by multi-selects */
danielk1977b3bce662005-01-29 08:32:43 +00001038 u8 isResolved; /* True once sqlite3SelectResolve() has run. */
1039 u8 isAgg; /* True if this is an aggregate query */
drh9bb61fe2000-06-05 16:01:39 +00001040};
1041
1042/*
drhfef52082000-06-06 01:50:43 +00001043** The results of a select can be distributed in several ways.
1044*/
1045#define SRT_Callback 1 /* Invoke a callback with each row of result */
1046#define SRT_Mem 2 /* Store result in a memory cell */
drh82c3d632000-06-06 21:56:07 +00001047#define SRT_Set 3 /* Store result as unique keys in a table */
1048#define SRT_Union 5 /* Store result as keys in a table */
1049#define SRT_Except 6 /* Remove result from a UNION table */
drh5974a302000-06-07 14:42:26 +00001050#define SRT_Table 7 /* Store result as data with a unique key */
drh2d0794e2002-03-03 03:03:52 +00001051#define SRT_TempTable 8 /* Store result in a trasient table */
drhd7489c32002-05-27 12:24:48 +00001052#define SRT_Discard 9 /* Do not save the results anywhere */
drhf46f9052002-06-22 02:33:38 +00001053#define SRT_Sorter 10 /* Store results in the sorter */
drh142e30d2002-08-28 03:00:58 +00001054#define SRT_Subroutine 11 /* Call a subroutine to handle results */
drh51522cd2005-01-20 13:36:19 +00001055#define SRT_Exists 12 /* Put 0 or 1 in a memory cell */
drhfef52082000-06-06 01:50:43 +00001056
1057/*
drh22827922000-06-06 17:27:05 +00001058** When a SELECT uses aggregate functions (like "count(*)" or "avg(f1)")
1059** we have to do some additional analysis of expressions. An instance
1060** of the following structure holds information about a single subexpression
1061** somewhere in the SELECT statement. An array of these structures holds
1062** all the information we need to generate code for aggregate
1063** expressions.
1064**
1065** Note that when analyzing a SELECT containing aggregates, both
1066** non-aggregate field variables and aggregate functions are stored
1067** in the AggExpr array of the Parser structure.
1068**
1069** The pExpr field points to an expression that is part of either the
1070** field list, the GROUP BY clause, the HAVING clause or the ORDER BY
1071** clause. The expression will be freed when those clauses are cleaned
1072** up. Do not try to delete the expression attached to AggExpr.pExpr.
1073**
1074** If AggExpr.pExpr==0, that means the expression is "count(*)".
1075*/
1076struct AggExpr {
1077 int isAgg; /* if TRUE contains an aggregate function */
1078 Expr *pExpr; /* The expression */
drh0bce8352002-02-28 00:41:10 +00001079 FuncDef *pFunc; /* Information about the aggregate function */
drh22827922000-06-06 17:27:05 +00001080};
1081
1082/*
drhf57b3392001-10-08 13:22:32 +00001083** An SQL parser context. A copy of this structure is passed through
1084** the parser and down into all the parser action routine in order to
1085** carry around information that is global to the entire parse.
drhf1974842004-11-05 03:56:00 +00001086**
1087** The structure is divided into two parts. When the parser and code
1088** generate call themselves recursively, the first part of the structure
1089** is constant but the second part is reset at the beginning and end of
1090** each recursion.
drh75897232000-05-29 14:26:00 +00001091*/
1092struct Parse {
drh9bb575f2004-09-06 17:24:11 +00001093 sqlite3 *db; /* The main database structure */
drh4c504392000-10-16 22:06:40 +00001094 int rc; /* Return code from execution */
drh75897232000-05-29 14:26:00 +00001095 char *zErrMsg; /* An error message */
drh75897232000-05-29 14:26:00 +00001096 Vdbe *pVdbe; /* An engine for executing database bytecode */
drh836faa42003-01-11 13:30:57 +00001097 u8 colNamesSet; /* TRUE after OP_ColumnName has been issued to pVdbe */
drhe0bc4042002-06-25 01:09:11 +00001098 u8 nameClash; /* A permanent table name clashes with temp table name */
drha6ecd332004-06-10 00:29:09 +00001099 u8 checkSchema; /* Causes schema cookie check after an error */
drh205f48e2004-11-05 00:43:11 +00001100 u8 nested; /* Number of nested calls to the parser/code generator */
drhfcd35c72005-05-21 02:48:08 +00001101 u8 fillAgg; /* If true, ignore the Expr.iAgg field. Normally false */
drh75897232000-05-29 14:26:00 +00001102 int nErr; /* Number of errors seen */
drh832508b2002-03-02 17:04:07 +00001103 int nTab; /* Number of previously allocated VDBE cursors */
drh19a775c2000-06-05 18:54:46 +00001104 int nMem; /* Number of memory cells used so far */
drhfef52082000-06-06 01:50:43 +00001105 int nSet; /* Number of sets used so far */
drh80242052004-06-09 00:48:12 +00001106 u32 writeMask; /* Start a write transaction on these databases */
drhfcd35c72005-05-21 02:48:08 +00001107 u32 cookieMask; /* Bitmask of schema verified databases */
1108 int cookieGoto; /* Address of OP_Goto to cookie verifier subroutine */
1109 int cookieValue[MAX_ATTACHED+2]; /* Values of cookies to verify */
drhf1974842004-11-05 03:56:00 +00001110
1111 /* Above is constant between recursions. Below is reset before and after
1112 ** each recursion */
1113
1114 int nVar; /* Number of '?' variables seen in the SQL so far */
1115 int nVarExpr; /* Number of used slots in apVarExpr[] */
1116 int nVarExprAlloc; /* Number of allocated slots in apVarExpr[] */
1117 Expr **apVarExpr; /* Pointers to :aaa and $aaaa wildcard expressions */
1118 u8 explain; /* True if the EXPLAIN flag is found on the query */
drhf1974842004-11-05 03:56:00 +00001119 Token sErrToken; /* The token at which the error occurred */
1120 Token sNameToken; /* Token with unqualified schema object name */
1121 Token sLastToken; /* The last token parsed */
1122 const char *zSql; /* All SQL text */
1123 const char *zTail; /* All SQL text past the last semicolon parsed */
1124 Table *pNewTable; /* A table being constructed by CREATE TABLE */
1125 Trigger *pNewTrigger; /* Trigger under construct by a CREATE TRIGGER */
1126 TriggerStack *trigStack; /* Trigger actions being coded */
1127 const char *zAuthContext; /* The 6th parameter to db->xAuth callbacks */
danielk1977b3bce662005-01-29 08:32:43 +00001128 int nAgg; /* Number of aggregate expressions */
1129 AggExpr *aAgg; /* An array of aggregate expressions */
1130 int nMaxDepth; /* Maximum depth of subquery recursion */
drh75897232000-05-29 14:26:00 +00001131};
1132
danielk1977d99bc932002-05-16 00:13:12 +00001133/*
drh85e20962003-04-25 17:52:11 +00001134** An instance of the following structure can be declared on a stack and used
1135** to save the Parse.zAuthContext value so that it can be restored later.
1136*/
1137struct AuthContext {
1138 const char *zAuthContext; /* Put saved Parse.zAuthContext here */
1139 Parse *pParse; /* The Parse structure */
1140};
1141
1142/*
rdcb0c374f2004-02-20 22:53:38 +00001143** Bitfield flags for P2 value in OP_PutIntKey and OP_Delete
1144*/
1145#define OPFLAG_NCHANGE 1 /* Set to update db->nChange */
1146#define OPFLAG_LASTROWID 2 /* Set to update db->lastRowid */
rdcb0c374f2004-02-20 22:53:38 +00001147
1148/*
danielk1977d99bc932002-05-16 00:13:12 +00001149 * Each trigger present in the database schema is stored as an instance of
1150 * struct Trigger.
1151 *
1152 * Pointers to instances of struct Trigger are stored in two ways.
drh9bb575f2004-09-06 17:24:11 +00001153 * 1. In the "trigHash" hash table (part of the sqlite3* that represents the
danielk1977d99bc932002-05-16 00:13:12 +00001154 * database). This allows Trigger structures to be retrieved by name.
1155 * 2. All triggers associated with a single table form a linked list, using the
drhad3cab52002-05-24 02:04:32 +00001156 * pNext member of struct Trigger. A pointer to the first element of the
1157 * linked list is stored as the "pTrigger" member of the associated
1158 * struct Table.
danielk1977d99bc932002-05-16 00:13:12 +00001159 *
drhad3cab52002-05-24 02:04:32 +00001160 * The "step_list" member points to the first element of a linked list
1161 * containing the SQL statements specified as the trigger program.
danielk1977d99bc932002-05-16 00:13:12 +00001162 */
danielk1977c3f9bad2002-05-15 08:30:12 +00001163struct Trigger {
drhdc379452002-05-15 12:45:43 +00001164 char *name; /* The name of the trigger */
1165 char *table; /* The table or view to which the trigger applies */
drhf0f258b2003-04-21 18:48:45 +00001166 u8 iDb; /* Database containing this trigger */
drh79a519c2003-05-17 19:04:03 +00001167 u8 iTabDb; /* Database containing Trigger.table */
drhf0f258b2003-04-21 18:48:45 +00001168 u8 op; /* One of TK_DELETE, TK_UPDATE, TK_INSERT */
drhdca76842004-12-07 14:06:13 +00001169 u8 tr_tm; /* One of TRIGGER_BEFORE, TRIGGER_AFTER */
drhdc379452002-05-15 12:45:43 +00001170 Expr *pWhen; /* The WHEN clause of the expresion (may be NULL) */
1171 IdList *pColumns; /* If this is an UPDATE OF <column-list> trigger,
danielk1977d99bc932002-05-16 00:13:12 +00001172 the <column-list> is stored here */
drhdc379452002-05-15 12:45:43 +00001173 int foreach; /* One of TK_ROW or TK_STATEMENT */
drh4312db52003-06-03 01:47:11 +00001174 Token nameToken; /* Token containing zName. Use during parsing only */
danielk1977c3f9bad2002-05-15 08:30:12 +00001175
drhdc379452002-05-15 12:45:43 +00001176 TriggerStep *step_list; /* Link list of trigger program steps */
drhdc379452002-05-15 12:45:43 +00001177 Trigger *pNext; /* Next trigger associated with the table */
danielk1977c3f9bad2002-05-15 08:30:12 +00001178};
1179
danielk1977d99bc932002-05-16 00:13:12 +00001180/*
drhdca76842004-12-07 14:06:13 +00001181** A trigger is either a BEFORE or an AFTER trigger. The following constants
1182** determine which.
1183**
1184** If there are multiple triggers, you might of some BEFORE and some AFTER.
1185** In that cases, the constants below can be ORed together.
1186*/
1187#define TRIGGER_BEFORE 1
1188#define TRIGGER_AFTER 2
1189
1190/*
danielk1977d99bc932002-05-16 00:13:12 +00001191 * An instance of struct TriggerStep is used to store a single SQL statement
1192 * that is a part of a trigger-program.
1193 *
1194 * Instances of struct TriggerStep are stored in a singly linked list (linked
1195 * using the "pNext" member) referenced by the "step_list" member of the
1196 * associated struct Trigger instance. The first element of the linked list is
1197 * the first step of the trigger-program.
1198 *
1199 * The "op" member indicates whether this is a "DELETE", "INSERT", "UPDATE" or
1200 * "SELECT" statement. The meanings of the other members is determined by the
1201 * value of "op" as follows:
1202 *
1203 * (op == TK_INSERT)
1204 * orconf -> stores the ON CONFLICT algorithm
1205 * pSelect -> If this is an INSERT INTO ... SELECT ... statement, then
1206 * this stores a pointer to the SELECT statement. Otherwise NULL.
1207 * target -> A token holding the name of the table to insert into.
1208 * pExprList -> If this is an INSERT INTO ... VALUES ... statement, then
1209 * this stores values to be inserted. Otherwise NULL.
1210 * pIdList -> If this is an INSERT INTO ... (<column-names>) VALUES ...
drhad3cab52002-05-24 02:04:32 +00001211 * statement, then this stores the column-names to be
1212 * inserted into.
danielk1977d99bc932002-05-16 00:13:12 +00001213 *
1214 * (op == TK_DELETE)
1215 * target -> A token holding the name of the table to delete from.
1216 * pWhere -> The WHERE clause of the DELETE statement if one is specified.
1217 * Otherwise NULL.
1218 *
1219 * (op == TK_UPDATE)
1220 * target -> A token holding the name of the table to update rows of.
1221 * pWhere -> The WHERE clause of the UPDATE statement if one is specified.
1222 * Otherwise NULL.
1223 * pExprList -> A list of the columns to update and the expressions to update
danielk19774adee202004-05-08 08:23:19 +00001224 * them to. See sqlite3Update() documentation of "pChanges"
drhad3cab52002-05-24 02:04:32 +00001225 * argument.
danielk1977d99bc932002-05-16 00:13:12 +00001226 *
1227 */
1228struct TriggerStep {
1229 int op; /* One of TK_DELETE, TK_UPDATE, TK_INSERT, TK_SELECT */
1230 int orconf; /* OE_Rollback etc. */
drha69d9162003-04-17 22:57:53 +00001231 Trigger *pTrig; /* The trigger that this step is a part of */
danielk1977c3f9bad2002-05-15 08:30:12 +00001232
danielk1977d99bc932002-05-16 00:13:12 +00001233 Select *pSelect; /* Valid for SELECT and sometimes
1234 INSERT steps (when pExprList == 0) */
1235 Token target; /* Valid for DELETE, UPDATE, INSERT steps */
1236 Expr *pWhere; /* Valid for DELETE, UPDATE steps */
1237 ExprList *pExprList; /* Valid for UPDATE statements and sometimes
1238 INSERT steps (when pSelect == 0) */
1239 IdList *pIdList; /* Valid for INSERT statements only */
1240
1241 TriggerStep * pNext; /* Next in the link-list */
1242};
1243
1244/*
1245 * An instance of struct TriggerStack stores information required during code
1246 * generation of a single trigger program. While the trigger program is being
1247 * coded, its associated TriggerStack instance is pointed to by the
1248 * "pTriggerStack" member of the Parse structure.
1249 *
1250 * The pTab member points to the table that triggers are being coded on. The
1251 * newIdx member contains the index of the vdbe cursor that points at the temp
1252 * table that stores the new.* references. If new.* references are not valid
1253 * for the trigger being coded (for example an ON DELETE trigger), then newIdx
1254 * is set to -1. The oldIdx member is analogous to newIdx, for old.* references.
1255 *
1256 * The ON CONFLICT policy to be used for the trigger program steps is stored
1257 * as the orconf member. If this is OE_Default, then the ON CONFLICT clause
1258 * specified for individual triggers steps is used.
1259 *
1260 * struct TriggerStack has a "pNext" member, to allow linked lists to be
1261 * constructed. When coding nested triggers (triggers fired by other triggers)
1262 * each nested trigger stores its parent trigger's TriggerStack as the "pNext"
1263 * pointer. Once the nested trigger has been coded, the pNext value is restored
1264 * to the pTriggerStack member of the Parse stucture and coding of the parent
1265 * trigger continues.
1266 *
1267 * Before a nested trigger is coded, the linked list pointed to by the
1268 * pTriggerStack is scanned to ensure that the trigger is not about to be coded
1269 * recursively. If this condition is detected, the nested trigger is not coded.
1270 */
1271struct TriggerStack {
1272 Table *pTab; /* Table that triggers are currently being coded on */
1273 int newIdx; /* Index of vdbe cursor to "new" temp table */
1274 int oldIdx; /* Index of vdbe cursor to "old" temp table */
1275 int orconf; /* Current orconf policy */
danielk19776f349032002-06-11 02:25:40 +00001276 int ignoreJump; /* where to jump to for a RAISE(IGNORE) */
drhe22a3342003-04-22 20:30:37 +00001277 Trigger *pTrigger; /* The trigger currently being coded */
1278 TriggerStack *pNext; /* Next trigger down on the trigger stack */
danielk1977d99bc932002-05-16 00:13:12 +00001279};
1280
1281/*
drhf26e09c2003-05-31 16:21:12 +00001282** The following structure contains information used by the sqliteFix...
1283** routines as they walk the parse tree to make database references
1284** explicit.
1285*/
1286typedef struct DbFixer DbFixer;
1287struct DbFixer {
1288 Parse *pParse; /* The parsing context. Error messages written here */
1289 const char *zDb; /* Make sure all objects are contained in this database */
1290 const char *zType; /* Type of the container - used for error messages */
1291 const Token *pName; /* Name of the container - used for error messages */
1292};
1293
1294/*
drh234c39d2004-07-24 03:30:47 +00001295** A pointer to this structure is used to communicate information
1296** from sqlite3Init and OP_ParseSchema into the sqlite3InitCallback.
1297*/
1298typedef struct {
drh9bb575f2004-09-06 17:24:11 +00001299 sqlite3 *db; /* The database being initialized */
drh234c39d2004-07-24 03:30:47 +00001300 char **pzErrMsg; /* Error message stored here */
1301} InitData;
1302
drhb6c29892004-11-22 19:12:19 +00001303/*
danielk1977d99bc932002-05-16 00:13:12 +00001304 * This global flag is set for performance testing of triggers. When it is set
1305 * SQLite will perform the overhead of building new and old trigger references
1306 * even when no triggers exist
1307 */
drh38f82712004-06-18 17:10:16 +00001308extern int sqlite3_always_code_trigger_setup;
danielk1977c3f9bad2002-05-15 08:30:12 +00001309
drh75897232000-05-29 14:26:00 +00001310/*
1311** Internal function prototypes
1312*/
danielk19774adee202004-05-08 08:23:19 +00001313int sqlite3StrICmp(const char *, const char *);
1314int sqlite3StrNICmp(const char *, const char *, int);
1315int sqlite3HashNoCase(const char *, int);
danielk19778a6b5412004-05-24 07:04:25 +00001316int sqlite3IsNumber(const char*, int*, u8);
danielk19774adee202004-05-08 08:23:19 +00001317int sqlite3Compare(const char *, const char *);
1318int sqlite3SortCompare(const char *, const char *);
1319void sqlite3RealToSortable(double r, char *);
danielk19772c336542005-01-13 02:14:23 +00001320#ifdef SQLITE_MEMDEBUG
danielk19774adee202004-05-08 08:23:19 +00001321 void *sqlite3Malloc_(int,int,char*,int);
1322 void sqlite3Free_(void*,char*,int);
1323 void *sqlite3Realloc_(void*,int,char*,int);
1324 char *sqlite3StrDup_(const char*,char*,int);
1325 char *sqlite3StrNDup_(const char*, int,char*,int);
1326 void sqlite3CheckMemory(void*,int);
drhdcc581c2000-05-30 13:44:19 +00001327#else
drhbdb43832004-06-18 17:45:11 +00001328 void *sqlite3Malloc(int);
1329 void *sqlite3MallocRaw(int);
1330 void sqlite3Free(void*);
1331 void *sqlite3Realloc(void*,int);
1332 char *sqlite3StrDup(const char*);
1333 char *sqlite3StrNDup(const char*, int);
danielk19774adee202004-05-08 08:23:19 +00001334# define sqlite3CheckMemory(a,b)
drh132d8d62005-05-22 20:12:37 +00001335# define sqlite3MallocX sqlite3Malloc
drhdcc581c2000-05-30 13:44:19 +00001336#endif
drh998da3a2004-06-19 15:22:56 +00001337void sqlite3FreeX(void*);
drh132d8d62005-05-22 20:12:37 +00001338void *sqlite3MallocX(int);
danielk19774adee202004-05-08 08:23:19 +00001339char *sqlite3MPrintf(const char*, ...);
1340char *sqlite3VMPrintf(const char*, va_list);
drhe54ca3f2004-06-07 01:52:14 +00001341void sqlite3DebugPrintf(const char*, ...);
drhfe63d1c2004-09-08 20:13:04 +00001342void *sqlite3TextToPtr(const char*);
drh41f58522005-06-06 15:06:39 +00001343void sqlite3SetString(char **, ...);
danielk19774adee202004-05-08 08:23:19 +00001344void sqlite3ErrorMsg(Parse*, const char*, ...);
1345void sqlite3Dequote(char*);
1346int sqlite3KeywordCode(const char*, int);
1347int sqlite3RunParser(Parse*, const char*, char **);
drh80242052004-06-09 00:48:12 +00001348void sqlite3FinishCoding(Parse*);
drhe4e72072004-11-23 01:47:30 +00001349Expr *sqlite3Expr(int, Expr*, Expr*, const Token*);
drh4e0cff62004-11-05 05:10:28 +00001350Expr *sqlite3RegisterExpr(Parse*,Token*);
drh91bb0ee2004-09-01 03:06:34 +00001351Expr *sqlite3ExprAnd(Expr*, Expr*);
danielk19774adee202004-05-08 08:23:19 +00001352void sqlite3ExprSpan(Expr*,Token*,Token*);
1353Expr *sqlite3ExprFunction(ExprList*, Token*);
drhfa6bc002004-09-07 16:19:52 +00001354void sqlite3ExprAssignVarNumber(Parse*, Expr*);
danielk19774adee202004-05-08 08:23:19 +00001355void sqlite3ExprDelete(Expr*);
1356ExprList *sqlite3ExprListAppend(ExprList*,Expr*,Token*);
1357void sqlite3ExprListDelete(ExprList*);
drh9bb575f2004-09-06 17:24:11 +00001358int sqlite3Init(sqlite3*, char**);
drh234c39d2004-07-24 03:30:47 +00001359int sqlite3InitCallback(void*, int, char**, char**);
danielk197791cf71b2004-06-26 06:37:06 +00001360void sqlite3Pragma(Parse*,Token*,Token*,Token*,int);
drh9bb575f2004-09-06 17:24:11 +00001361void sqlite3ResetInternalSchema(sqlite3*, int);
danielk19774adee202004-05-08 08:23:19 +00001362void sqlite3BeginParse(Parse*,int);
drh9bb575f2004-09-06 17:24:11 +00001363void sqlite3RollbackInternalChanges(sqlite3*);
1364void sqlite3CommitInternalChanges(sqlite3*);
danielk19774adee202004-05-08 08:23:19 +00001365Table *sqlite3ResultSetOfSelect(Parse*,char*,Select*);
1366void sqlite3OpenMasterTable(Vdbe *v, int);
danielk1977cbb18d22004-05-28 11:37:27 +00001367void sqlite3StartTable(Parse*,Token*,Token*,Token*,int,int);
danielk19774adee202004-05-08 08:23:19 +00001368void sqlite3AddColumn(Parse*,Token*);
1369void sqlite3AddNotNull(Parse*, int);
drh205f48e2004-11-05 00:43:11 +00001370void sqlite3AddPrimaryKey(Parse*, ExprList*, int, int);
danielk19774adee202004-05-08 08:23:19 +00001371void sqlite3AddColumnType(Parse*,Token*,Token*);
danielk19777977a172004-11-09 12:44:37 +00001372void sqlite3AddDefaultValue(Parse*,Expr*);
drhd3d39e92004-05-20 22:16:29 +00001373void sqlite3AddCollateType(Parse*, const char*, int);
danielk197719a8e7e2005-03-17 05:03:38 +00001374void sqlite3EndTable(Parse*,Token*,Token*,Select*);
drhb7f91642004-10-31 02:22:47 +00001375
1376#ifndef SQLITE_OMIT_VIEW
1377 void sqlite3CreateView(Parse*,Token*,Token*,Token*,Select*,int);
1378 int sqlite3ViewGetColumnNames(Parse*,Table*);
1379#else
1380# define sqlite3ViewGetColumnNames(A,B) 0
1381#endif
1382
danielk1977a8858102004-05-28 12:11:21 +00001383void sqlite3DropTable(Parse*, SrcList*, int);
drh9bb575f2004-09-06 17:24:11 +00001384void sqlite3DeleteTable(sqlite3*, Table*);
danielk19774adee202004-05-08 08:23:19 +00001385void sqlite3Insert(Parse*, SrcList*, ExprList*, Select*, IdList*, int);
1386IdList *sqlite3IdListAppend(IdList*, Token*);
1387int sqlite3IdListIndex(IdList*,const char*);
1388SrcList *sqlite3SrcListAppend(SrcList*, Token*, Token*);
1389void sqlite3SrcListAddAlias(SrcList*, Token*);
1390void sqlite3SrcListAssignCursors(Parse*, SrcList*);
1391void sqlite3IdListDelete(IdList*);
1392void sqlite3SrcListDelete(SrcList*);
danielk19770202b292004-06-09 09:55:16 +00001393void sqlite3CreateIndex(Parse*,Token*,Token*,SrcList*,ExprList*,int,Token*,
danielk1977ef2cb632004-05-29 02:37:19 +00001394 Token*);
danielk19774adee202004-05-08 08:23:19 +00001395void sqlite3DropIndex(Parse*, SrcList*);
1396void sqlite3AddKeyType(Vdbe*, ExprList*);
1397void sqlite3AddIdxKeyType(Vdbe*, Index*);
danielk1977b3bce662005-01-29 08:32:43 +00001398int sqlite3Select(Parse*, Select*, int, int, Select*, int, int*, char *aff);
danielk19774adee202004-05-08 08:23:19 +00001399Select *sqlite3SelectNew(ExprList*,SrcList*,Expr*,ExprList*,Expr*,ExprList*,
danielk1977a2dc3b12005-02-05 12:48:48 +00001400 int,Expr*,Expr*);
danielk19774adee202004-05-08 08:23:19 +00001401void sqlite3SelectDelete(Select*);
1402void sqlite3SelectUnbind(Select*);
1403Table *sqlite3SrcListLookup(Parse*, SrcList*);
1404int sqlite3IsReadOnly(Parse*, Table*, int);
drhad6d9462004-09-19 02:15:24 +00001405void sqlite3OpenTableForReading(Vdbe*, int iCur, Table*);
drhb6c29892004-11-22 19:12:19 +00001406void sqlite3OpenTable(Vdbe*, int iCur, Table*, int);
danielk19774adee202004-05-08 08:23:19 +00001407void sqlite3DeleteFrom(Parse*, SrcList*, Expr*);
1408void sqlite3Update(Parse*, SrcList*, ExprList*, Expr*, int);
drhf8db1bc2005-04-22 02:38:37 +00001409WhereInfo *sqlite3WhereBegin(Parse*, SrcList*, Expr*, ExprList**);
danielk19774adee202004-05-08 08:23:19 +00001410void sqlite3WhereEnd(WhereInfo*);
1411void sqlite3ExprCode(Parse*, Expr*);
drh25303782004-12-07 15:41:48 +00001412void sqlite3ExprCodeAndCache(Parse*, Expr*);
drhf9b596e2004-05-26 16:54:42 +00001413int sqlite3ExprCodeExprList(Parse*, ExprList*);
danielk19774adee202004-05-08 08:23:19 +00001414void sqlite3ExprIfTrue(Parse*, Expr*, int, int);
1415void sqlite3ExprIfFalse(Parse*, Expr*, int, int);
drh205f48e2004-11-05 00:43:11 +00001416void sqlite3NextedParse(Parse*, const char*, ...);
drh9bb575f2004-09-06 17:24:11 +00001417Table *sqlite3FindTable(sqlite3*,const char*, const char*);
danielk19774adee202004-05-08 08:23:19 +00001418Table *sqlite3LocateTable(Parse*,const char*, const char*);
drh9bb575f2004-09-06 17:24:11 +00001419Index *sqlite3FindIndex(sqlite3*,const char*, const char*);
1420void sqlite3UnlinkAndDeleteTable(sqlite3*,int,const char*);
1421void sqlite3UnlinkAndDeleteIndex(sqlite3*,int,const char*);
danielk19774adee202004-05-08 08:23:19 +00001422void sqlite3Vacuum(Parse*, Token*);
drh9bb575f2004-09-06 17:24:11 +00001423int sqlite3RunVacuum(char**, sqlite3*);
drha99db3b2004-06-19 14:49:12 +00001424char *sqlite3NameFromToken(Token*);
danielk19774adee202004-05-08 08:23:19 +00001425int sqlite3ExprCheck(Parse*, Expr*, int, int*);
danielk19774adee202004-05-08 08:23:19 +00001426int sqlite3ExprCompare(Expr*, Expr*);
drhcce7d172000-05-31 15:34:51 +00001427int sqliteFuncId(Token*);
danielk1977b3bce662005-01-29 08:32:43 +00001428int sqlite3ExprResolveNames(NameContext *, Expr *);
danielk1977a58fdfb2005-02-08 07:50:40 +00001429int sqlite3ExprAnalyzeAggregates(NameContext*, Expr*);
danielk19774adee202004-05-08 08:23:19 +00001430Vdbe *sqlite3GetVdbe(Parse*);
1431void sqlite3Randomness(int, void*);
drh9bb575f2004-09-06 17:24:11 +00001432void sqlite3RollbackAll(sqlite3*);
danielk19774adee202004-05-08 08:23:19 +00001433void sqlite3CodeVerifySchema(Parse*, int);
drh684917c2004-10-05 02:41:42 +00001434void sqlite3BeginTransaction(Parse*, int);
danielk19774adee202004-05-08 08:23:19 +00001435void sqlite3CommitTransaction(Parse*);
1436void sqlite3RollbackTransaction(Parse*);
1437int sqlite3ExprIsConstant(Expr*);
1438int sqlite3ExprIsInteger(Expr*, int*);
1439int sqlite3IsRowid(const char*);
drh9bb575f2004-09-06 17:24:11 +00001440void sqlite3GenerateRowDelete(sqlite3*, Vdbe*, Table*, int, int);
1441void sqlite3GenerateRowIndexDelete(sqlite3*, Vdbe*, Table*, int, char*);
drh51846b52004-05-28 16:00:21 +00001442void sqlite3GenerateIndexKey(Vdbe*, Index*, int);
danielk19774adee202004-05-08 08:23:19 +00001443void sqlite3GenerateConstraintChecks(Parse*,Table*,int,char*,int,int,int,int);
1444void sqlite3CompleteInsertion(Parse*, Table*, int, char*, int, int, int);
drh290c1942004-08-21 17:54:45 +00001445void sqlite3OpenTableAndIndices(Parse*, Table*, int, int);
danielk19774adee202004-05-08 08:23:19 +00001446void sqlite3BeginWriteOperation(Parse*, int, int);
danielk19774adee202004-05-08 08:23:19 +00001447Expr *sqlite3ExprDup(Expr*);
1448void sqlite3TokenCopy(Token*, Token*);
1449ExprList *sqlite3ExprListDup(ExprList*);
1450SrcList *sqlite3SrcListDup(SrcList*);
1451IdList *sqlite3IdListDup(IdList*);
1452Select *sqlite3SelectDup(Select*);
drh9bb575f2004-09-06 17:24:11 +00001453FuncDef *sqlite3FindFunction(sqlite3*,const char*,int,int,u8,int);
1454void sqlite3RegisterBuiltinFunctions(sqlite3*);
1455void sqlite3RegisterDateTimeFunctions(sqlite3*);
1456int sqlite3SafetyOn(sqlite3*);
1457int sqlite3SafetyOff(sqlite3*);
1458int sqlite3SafetyCheck(sqlite3*);
1459void sqlite3ChangeCookie(sqlite3*, Vdbe*, int);
drhb7f91642004-10-31 02:22:47 +00001460
1461#ifndef SQLITE_OMIT_TRIGGER
1462 void sqlite3BeginTrigger(Parse*, Token*,Token*,int,int,IdList*,SrcList*,
1463 int,Expr*,int);
1464 void sqlite3FinishTrigger(Parse*, TriggerStep*, Token*);
1465 void sqlite3DropTrigger(Parse*, SrcList*);
1466 void sqlite3DropTriggerPtr(Parse*, Trigger*, int);
drhdca76842004-12-07 14:06:13 +00001467 int sqlite3TriggersExist(Parse*, Table*, int, ExprList*);
drhb7f91642004-10-31 02:22:47 +00001468 int sqlite3CodeRowTrigger(Parse*, int, ExprList*, int, Table *, int, int,
1469 int, int);
1470 void sqliteViewTriggers(Parse*, Table*, Expr*, int, ExprList*);
1471 void sqlite3DeleteTriggerStep(TriggerStep*);
1472 TriggerStep *sqlite3TriggerSelectStep(Select*);
1473 TriggerStep *sqlite3TriggerInsertStep(Token*, IdList*, ExprList*,Select*,int);
1474 TriggerStep *sqlite3TriggerUpdateStep(Token*, ExprList*, Expr*, int);
1475 TriggerStep *sqlite3TriggerDeleteStep(Token*, Expr*);
1476 void sqlite3DeleteTrigger(Trigger*);
1477 void sqlite3UnlinkAndDeleteTrigger(sqlite3*,int,const char*);
1478#else
1479# define sqlite3TriggersExist(A,B,C,D,E,F) 0
1480# define sqlite3DeleteTrigger(A)
1481# define sqlite3DropTriggerPtr(A,B,C)
1482# define sqlite3UnlinkAndDeleteTrigger(A,B,C)
1483# define sqlite3CodeRowTrigger(A,B,C,D,E,F,G,H,I) 0
1484#endif
1485
danielk19774adee202004-05-08 08:23:19 +00001486int sqlite3JoinType(Parse*, Token*, Token*, Token*);
danielk19770202b292004-06-09 09:55:16 +00001487void sqlite3CreateForeignKey(Parse*, ExprList*, Token*, ExprList*, int);
danielk19774adee202004-05-08 08:23:19 +00001488void sqlite3DeferForeignKey(Parse*, int);
drhed6c8672003-01-12 18:02:16 +00001489#ifndef SQLITE_OMIT_AUTHORIZATION
danielk19774adee202004-05-08 08:23:19 +00001490 void sqlite3AuthRead(Parse*,Expr*,SrcList*);
1491 int sqlite3AuthCheck(Parse*,int, const char*, const char*, const char*);
1492 void sqlite3AuthContextPush(Parse*, AuthContext*, const char*);
1493 void sqlite3AuthContextPop(AuthContext*);
drhed6c8672003-01-12 18:02:16 +00001494#else
danielk19774adee202004-05-08 08:23:19 +00001495# define sqlite3AuthRead(a,b,c)
1496# define sqlite3AuthCheck(a,b,c,d,e) SQLITE_OK
1497# define sqlite3AuthContextPush(a,b,c)
1498# define sqlite3AuthContextPop(a) ((void)(a))
drhed6c8672003-01-12 18:02:16 +00001499#endif
drh25d65432004-07-22 15:02:25 +00001500void sqlite3Attach(Parse*, Token*, Token*, int, Token*);
danielk19774adee202004-05-08 08:23:19 +00001501void sqlite3Detach(Parse*, Token*);
drh9bb575f2004-09-06 17:24:11 +00001502int sqlite3BtreeFactory(const sqlite3 *db, const char *zFilename,
drh90f5ecb2004-07-22 01:19:35 +00001503 int omitJournal, int nCache, Btree **ppBtree);
danielk19774adee202004-05-08 08:23:19 +00001504int sqlite3FixInit(DbFixer*, Parse*, int, const char*, const Token*);
1505int sqlite3FixSrcList(DbFixer*, SrcList*);
1506int sqlite3FixSelect(DbFixer*, Select*);
1507int sqlite3FixExpr(DbFixer*, Expr*);
1508int sqlite3FixExprList(DbFixer*, ExprList*);
1509int sqlite3FixTriggerStep(DbFixer*, TriggerStep*);
1510double sqlite3AtoF(const char *z, const char **);
danielk19776f8a5032004-05-10 10:34:51 +00001511char *sqlite3_snprintf(int,char*,const char*,...);
drhfec19aa2004-05-19 20:41:03 +00001512int sqlite3GetInt32(const char *, int*);
drhfec19aa2004-05-19 20:41:03 +00001513int sqlite3FitsIn64Bits(const char *);
danielk19776622cce2004-05-20 11:00:52 +00001514int sqlite3utf16ByteLen(const void *pData, int nChar);
1515int sqlite3utf8CharLen(const char *pData, int nByte);
drh4e5ffc52004-08-31 00:52:37 +00001516int sqlite3ReadUtf8(const unsigned char *);
danielk1977192ac1d2004-05-10 07:17:30 +00001517int sqlite3PutVarint(unsigned char *, u64);
danielk197790e4d952004-05-10 10:05:53 +00001518int sqlite3GetVarint(const unsigned char *, u64 *);
drh6d2fb152004-05-14 16:50:06 +00001519int sqlite3GetVarint32(const unsigned char *, u32 *);
danielk1977192ac1d2004-05-10 07:17:30 +00001520int sqlite3VarintLen(u64 v);
danielk1977a37cdde2004-05-16 11:15:36 +00001521void sqlite3IndexAffinityStr(Vdbe *, Index *);
1522void sqlite3TableAffinityStr(Vdbe *, Table *);
danielk1977e014a832004-05-17 10:48:57 +00001523char sqlite3CompareAffinity(Expr *pExpr, char aff2);
danielk1977e014a832004-05-17 10:48:57 +00001524int sqlite3IndexAffinityOk(Expr *pExpr, char idx_affinity);
danielk1977bf3b7212004-05-18 10:06:24 +00001525char sqlite3ExprAffinity(Expr *pExpr);
drheb2e1762004-05-27 01:53:56 +00001526int sqlite3atoi64(const char*, i64*);
drh9bb575f2004-09-06 17:24:11 +00001527void sqlite3Error(sqlite3*, int, const char*,...);
danielk1977cbb18d22004-05-28 11:37:27 +00001528void *sqlite3HexToBlob(const char *z);
danielk1977ef2cb632004-05-29 02:37:19 +00001529int sqlite3TwoPartName(Parse *, Token *, Token *, Token **);
danielk1977f20b21c2004-05-31 23:56:42 +00001530const char *sqlite3ErrStr(int);
danielk1977d02eb1f2004-06-06 09:44:03 +00001531int sqlite3ReadUniChar(const char *zStr, int *pOffset, u8 *pEnc, int fold);
danielk19778a414492004-06-29 08:59:35 +00001532int sqlite3ReadSchema(Parse *pParse);
drh9bb575f2004-09-06 17:24:11 +00001533CollSeq *sqlite3FindCollSeq(sqlite3*,u8 enc, const char *,int,int);
danielk19770202b292004-06-09 09:55:16 +00001534CollSeq *sqlite3LocateCollSeq(Parse *pParse, const char *zName, int nName);
danielk19777cedc8d2004-06-10 10:50:08 +00001535CollSeq *sqlite3ExprCollSeq(Parse *pParse, Expr *pExpr);
1536int sqlite3CheckCollSeq(Parse *, CollSeq *);
1537int sqlite3CheckIndexCollSeq(Parse *, Index *);
danielk1977d8123362004-06-12 09:25:12 +00001538int sqlite3CheckObjectName(Parse *, const char *);
danielk1977b28af712004-06-21 06:50:26 +00001539void sqlite3VdbeSetChanges(sqlite3 *, int);
danielk1977f4618892004-06-28 13:09:11 +00001540void sqlite3utf16Substr(sqlite3_context *,int,sqlite3_value **);
danielk19774e6af132004-06-10 14:01:08 +00001541
1542const void *sqlite3ValueText(sqlite3_value*, u8);
1543int sqlite3ValueBytes(sqlite3_value*, u8);
danielk1977bfd6cce2004-06-18 04:24:54 +00001544void sqlite3ValueSetStr(sqlite3_value*, int, const void *,u8, void(*)(void*));
danielk19774e6af132004-06-10 14:01:08 +00001545void sqlite3ValueFree(sqlite3_value*);
1546sqlite3_value *sqlite3ValueNew();
drh9bb575f2004-09-06 17:24:11 +00001547sqlite3_value *sqlite3GetTransientValue(sqlite3*db);
danielk1977aee18ef2005-03-09 12:26:50 +00001548int sqlite3ValueFromExpr(Expr *, u8, u8, sqlite3_value **);
1549void sqlite3ValueApplyAffinity(sqlite3_value *, u8, u8);
drh4e5ffc52004-08-31 00:52:37 +00001550extern const unsigned char sqlite3UpperToLower[];
danielk1977a0bf2652004-11-04 14:30:04 +00001551void sqlite3RootPageMoved(Db*, int, int);
drh4343fea2004-11-05 23:46:15 +00001552void sqlite3Reindex(Parse*, Token*, Token*);
drh1f01ec12005-02-15 21:36:18 +00001553void sqlite3AlterFunctions(sqlite3*);
danielk19779fd2a9a2004-11-12 13:42:30 +00001554void sqlite3AlterRenameTable(Parse*, SrcList*, Token*);
1555int sqlite3GetToken(const unsigned char *, int *);
drh2958a4e2004-11-12 03:56:15 +00001556void sqlite3NestedParse(Parse*, const char*, ...);
drhd89bd002005-01-22 03:03:54 +00001557void sqlite3ExpirePreparedStatements(sqlite3*);
danielk1977b3bce662005-01-29 08:32:43 +00001558void sqlite3CodeSubselect(Parse *, Expr *);
1559int sqlite3SelectResolve(Parse *, Select *, NameContext *);
danielk1977aee18ef2005-03-09 12:26:50 +00001560void sqlite3ColumnDefault(Vdbe *, Table *, int);
danielk197719a8e7e2005-03-17 05:03:38 +00001561void sqlite3AlterFinishAddColumn(Parse *, Token *);
1562void sqlite3AlterBeginAddColumn(Parse *, SrcList *);
drh2e66f0b2005-04-28 17:18:48 +00001563const char *sqlite3TestErrorName(int);
danielk19774dade032005-05-25 10:45:10 +00001564CollSeq *sqlite3GetCollSeq(sqlite3*, CollSeq *, const char *, int);
danielk1977e3026632004-06-22 11:29:02 +00001565
danielk1977fd9a0a42005-05-24 12:01:00 +00001566#ifdef SQLITE_SSE
1567#include "sseInt.h"
1568#endif
1569
danielk1977e3026632004-06-22 11:29:02 +00001570#endif