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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**
danielk1977a2dc3b12005-02-05 12:48:48 +000014** @(#) $Id: sqliteInt.h,v 1.367 2005/02/05 12:48:48 danielk1977 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
drh58f391b2002-11-20 11:55:18 +000042#include "config.h"
drh1d482dd2004-05-31 18:23:07 +000043#include "sqlite3.h"
drhbeae3192001-09-22 18:12:08 +000044#include "hash.h"
drh75897232000-05-29 14:26:00 +000045#include "parse.h"
drh75897232000-05-29 14:26:00 +000046#include <stdio.h>
47#include <stdlib.h>
48#include <string.h>
49#include <assert.h>
drh52370e22005-01-21 21:31:40 +000050#include <stddef.h>
drh75897232000-05-29 14:26:00 +000051
drh967e8b72000-06-21 13:59:10 +000052/*
drha1b351a2001-09-14 16:42:12 +000053** The maximum number of in-memory pages to use for the main database
54** table and for temporary tables.
55*/
drh1ba1e6e2005-01-21 21:22:52 +000056#ifdef SQLITE_DEFAULT_CACHE_SIZE
57# define MAX_PAGES SQLITE_DEFAULT_CACHE_SIZE
58#else
59# define MAX_PAGES 2000
60#endif
drh603240c2002-03-05 01:11:12 +000061#define TEMP_PAGES 500
drha1b351a2001-09-14 16:42:12 +000062
63/*
drh0bd1f4e2002-06-06 18:54:39 +000064** If the following macro is set to 1, then NULL values are considered
65** distinct for the SELECT DISTINCT statement and for UNION or EXCEPT
66** compound queries. No other SQL database engine (among those tested)
67** works this way except for OCELOT. But the SQL92 spec implies that
68** this is how things should work.
69**
70** If the following macro is set to 0, then NULLs are indistinct for
71** SELECT DISTINCT and for UNION.
72*/
73#define NULL_ALWAYS_DISTINCT 0
74
75/*
76** If the following macro is set to 1, then NULL values are considered
77** distinct when determining whether or not two entries are the same
78** in a UNIQUE index. This is the way PostgreSQL, Oracle, DB2, MySQL,
79** OCELOT, and Firebird all work. The SQL92 spec explicitly says this
80** is the way things are suppose to work.
81**
82** If the following macro is set to 0, the NULLs are indistinct for
83** a UNIQUE index. In this mode, you can only have a single NULL entry
84** for a column declared UNIQUE. This is the way Informix and SQL Server
85** work.
86*/
87#define NULL_DISTINCT_FOR_UNIQUE 1
88
89/*
drh665de472003-03-31 13:36:09 +000090** The maximum number of attached databases. This must be at least 2
91** in order to support the main database file (0) and the file used to
drh80242052004-06-09 00:48:12 +000092** hold temporary tables (1). And it must be less than 32 because
93** we use a bitmask of databases with a u32 in places (for example
94** the Parse.cookieMask field).
drh665de472003-03-31 13:36:09 +000095*/
96#define MAX_ATTACHED 10
97
98/*
drhfa6bc002004-09-07 16:19:52 +000099** The maximum value of a ?nnn wildcard that the parser will accept.
100*/
101#define SQLITE_MAX_VARIABLE_NUMBER 999
102
103/*
drh13bff812003-04-15 01:19:47 +0000104** When building SQLite for embedded systems where memory is scarce,
105** you can define one or more of the following macros to omit extra
106** features of the library and thus keep the size of the library to
107** a minimum.
108*/
109/* #define SQLITE_OMIT_AUTHORIZATION 1 */
danielk19773e8c37e2005-01-21 03:12:14 +0000110/* #define SQLITE_OMIT_MEMORYDB 1 */
drh13bff812003-04-15 01:19:47 +0000111/* #define SQLITE_OMIT_VACUUM 1 */
drh0a5294b2003-11-11 23:30:35 +0000112/* #define SQLITE_OMIT_DATETIME_FUNCS 1 */
danielk1977348bb5d2003-10-18 09:37:26 +0000113/* #define SQLITE_OMIT_PROGRESS_CALLBACK 1 */
danielk197745901d62004-11-10 15:27:38 +0000114/* #define SQLITE_OMIT_AUTOVACUUM */
danielk19779fd2a9a2004-11-12 13:42:30 +0000115/* #define SQLITE_OMIT_ALTERTABLE */
drh13bff812003-04-15 01:19:47 +0000116
117/*
drh49766d62005-01-08 18:42:28 +0000118** Provide a default value for TEMP_STORE in case it is not specified
119** on the command-line
120*/
121#ifndef TEMP_STORE
122# define TEMP_STORE 1
123#endif
124
125/*
drhf1974842004-11-05 03:56:00 +0000126** GCC does not define the offsetof() macro so we'll have to do it
127** ourselves.
128*/
129#ifndef offsetof
130#define offsetof(STRUCTURE,FIELD) ((int)((char*)&((STRUCTURE*)0)->FIELD))
131#endif
132
133/*
drh5a2c2c22001-11-21 02:21:11 +0000134** Integers of known sizes. These typedefs might change for architectures
135** where the sizes very. Preprocessor macros are available so that the
136** types can be conveniently redefined at compile-type. Like this:
137**
138** cc '-DUINTPTR_TYPE=long long int' ...
drh41a2b482001-01-20 19:52:49 +0000139*/
drh3aac2dd2004-04-26 14:10:20 +0000140#ifndef UINT64_TYPE
drhefad9992004-06-22 12:13:55 +0000141# if defined(_MSC_VER) || defined(__BORLANDC__)
142# define UINT64_TYPE unsigned __int64
143# else
144# define UINT64_TYPE unsigned long long int
145# endif
drh3aac2dd2004-04-26 14:10:20 +0000146#endif
drh5a2c2c22001-11-21 02:21:11 +0000147#ifndef UINT32_TYPE
148# define UINT32_TYPE unsigned int
149#endif
150#ifndef UINT16_TYPE
151# define UINT16_TYPE unsigned short int
152#endif
drh939a16d2004-07-15 13:37:22 +0000153#ifndef INT16_TYPE
154# define INT16_TYPE short int
155#endif
drh5a2c2c22001-11-21 02:21:11 +0000156#ifndef UINT8_TYPE
157# define UINT8_TYPE unsigned char
158#endif
drh905793e2004-02-21 13:31:09 +0000159#ifndef INT8_TYPE
160# define INT8_TYPE signed char
161#endif
drhefad9992004-06-22 12:13:55 +0000162#ifndef LONGDOUBLE_TYPE
163# define LONGDOUBLE_TYPE long double
164#endif
drh5a2c2c22001-11-21 02:21:11 +0000165#ifndef INTPTR_TYPE
drh58f391b2002-11-20 11:55:18 +0000166# if SQLITE_PTR_SZ==4
167# define INTPTR_TYPE int
168# else
drhefad9992004-06-22 12:13:55 +0000169# define INTPTR_TYPE sqlite_int64
drhd2f0a722004-08-04 14:29:22 +0000170# endif
171#endif
172#ifndef UINTPTR_TYPE
173# if SQLITE_PTR_SZ==4
174# define UINTPTR_TYPE unsigned int
175# else
drh1211de32004-07-26 12:24:22 +0000176# define UINTPTR_TYPE sqlite_uint64
drh58f391b2002-11-20 11:55:18 +0000177# endif
drh5a2c2c22001-11-21 02:21:11 +0000178#endif
drhefad9992004-06-22 12:13:55 +0000179typedef sqlite_int64 i64; /* 8-byte signed integer */
drh3aac2dd2004-04-26 14:10:20 +0000180typedef UINT64_TYPE u64; /* 8-byte unsigned integer */
drh5a2c2c22001-11-21 02:21:11 +0000181typedef UINT32_TYPE u32; /* 4-byte unsigned integer */
182typedef UINT16_TYPE u16; /* 2-byte unsigned integer */
drh939a16d2004-07-15 13:37:22 +0000183typedef INT16_TYPE i16; /* 2-byte signed integer */
drh5a2c2c22001-11-21 02:21:11 +0000184typedef UINT8_TYPE u8; /* 1-byte unsigned integer */
drh905793e2004-02-21 13:31:09 +0000185typedef UINT8_TYPE i8; /* 1-byte signed integer */
drh5a2c2c22001-11-21 02:21:11 +0000186typedef INTPTR_TYPE ptr; /* Big enough to hold a pointer */
drh1211de32004-07-26 12:24:22 +0000187typedef UINTPTR_TYPE uptr; /* Big enough to hold a pointer */
drh5a2c2c22001-11-21 02:21:11 +0000188
189/*
drhbbd42a62004-05-22 17:41:58 +0000190** Macros to determine whether the machine is big or little endian,
191** evaluated at runtime.
192*/
193extern const int sqlite3one;
drh9c054832004-05-31 18:51:57 +0000194#define SQLITE_BIGENDIAN (*(char *)(&sqlite3one)==0)
195#define SQLITE_LITTLEENDIAN (*(char *)(&sqlite3one)==1)
drhbbd42a62004-05-22 17:41:58 +0000196
197/*
drh90f5ecb2004-07-22 01:19:35 +0000198** An instance of the following structure is used to store the busy-handler
199** callback for a given sqlite handle.
200**
201** The sqlite.busyHandler member of the sqlite struct contains the busy
202** callback for the database handle. Each pager opened via the sqlite
203** handle is passed a pointer to sqlite.busyHandler. The busy-handler
204** callback is currently invoked only from within pager.c.
205*/
206typedef struct BusyHandler BusyHandler;
207struct BusyHandler {
208 int (*xFunc)(void *,int); /* The busy callback */
209 void *pArg; /* First arg to busy callback */
210};
211
212/*
213** Defer sourcing vdbe.h and btree.h until after the "u8" and
214** "BusyHandler typedefs.
drh905793e2004-02-21 13:31:09 +0000215*/
216#include "vdbe.h"
drh3aac2dd2004-04-26 14:10:20 +0000217#include "btree.h"
drh905793e2004-02-21 13:31:09 +0000218
219/*
drh5a2c2c22001-11-21 02:21:11 +0000220** This macro casts a pointer to an integer. Useful for doing
221** pointer arithmetic.
222*/
223#define Addr(X) ((uptr)X)
drh41a2b482001-01-20 19:52:49 +0000224
225/*
drh967e8b72000-06-21 13:59:10 +0000226** If memory allocation problems are found, recompile with
227**
drhfaa57ac2004-06-09 14:01:51 +0000228** -DSQLITE_DEBUG=1
drh967e8b72000-06-21 13:59:10 +0000229**
230** to enable some sanity checking on malloc() and free(). To
231** check for memory leaks, recompile with
232**
drhfaa57ac2004-06-09 14:01:51 +0000233** -DSQLITE_DEBUG=2
drh967e8b72000-06-21 13:59:10 +0000234**
235** and a line of text will be written to standard error for
236** each malloc() and free(). This output can be analyzed
237** by an AWK script to determine if there are any leaks.
238*/
danielk19772c336542005-01-13 02:14:23 +0000239#ifdef SQLITE_MEMDEBUG
danielk19774adee202004-05-08 08:23:19 +0000240# define sqliteMalloc(X) sqlite3Malloc_(X,1,__FILE__,__LINE__)
241# define sqliteMallocRaw(X) sqlite3Malloc_(X,0,__FILE__,__LINE__)
242# define sqliteFree(X) sqlite3Free_(X,__FILE__,__LINE__)
243# define sqliteRealloc(X,Y) sqlite3Realloc_(X,Y,__FILE__,__LINE__)
244# define sqliteStrDup(X) sqlite3StrDup_(X,__FILE__,__LINE__)
245# define sqliteStrNDup(X,Y) sqlite3StrNDup_(X,Y,__FILE__,__LINE__)
drhc3c2fc92000-05-31 22:58:39 +0000246#else
drh38f82712004-06-18 17:10:16 +0000247# define sqliteFree sqlite3FreeX
248# define sqliteMalloc sqlite3Malloc
249# define sqliteMallocRaw sqlite3MallocRaw
250# define sqliteRealloc sqlite3Realloc
drhae29ffb2004-09-25 14:39:18 +0000251# define sqliteStrDup sqlite3StrDup
252# define sqliteStrNDup sqlite3StrNDup
drhdcc581c2000-05-30 13:44:19 +0000253#endif
254
drh75897232000-05-29 14:26:00 +0000255/*
drhdaffd0e2001-04-11 14:28:42 +0000256** This variable gets set if malloc() ever fails. After it gets set,
257** the SQLite library shuts down permanently.
258*/
danielk19776f8a5032004-05-10 10:34:51 +0000259extern int sqlite3_malloc_failed;
drhdaffd0e2001-04-11 14:28:42 +0000260
261/*
drh6e142f52000-06-08 13:36:40 +0000262** The following global variables are used for testing and debugging
drhfaa57ac2004-06-09 14:01:51 +0000263** only. They only work if SQLITE_DEBUG is defined.
drh6e142f52000-06-08 13:36:40 +0000264*/
danielk19772c336542005-01-13 02:14:23 +0000265#ifdef SQLITE_MEMDEBUG
drh46934232004-11-20 19:18:00 +0000266extern int sqlite3_nMalloc; /* Number of sqliteMalloc() calls */
267extern int sqlite3_nFree; /* Number of sqliteFree() calls */
268extern int sqlite3_iMallocFail; /* Fail sqliteMalloc() after this many calls */
269extern int sqlite3_iMallocReset; /* Set iMallocFail to this when it reaches 0 */
drh6e142f52000-06-08 13:36:40 +0000270#endif
271
272/*
drh75897232000-05-29 14:26:00 +0000273** Name of the master database table. The master database table
274** is a special table that holds the names and attributes of all
275** user tables and indices.
276*/
drhe0bc4042002-06-25 01:09:11 +0000277#define MASTER_NAME "sqlite_master"
278#define TEMP_MASTER_NAME "sqlite_temp_master"
drh75897232000-05-29 14:26:00 +0000279
280/*
danielk19778e150812004-05-10 01:17:37 +0000281** The root-page of the master database table.
282*/
283#define MASTER_ROOT 1
284
285/*
drhed6c8672003-01-12 18:02:16 +0000286** The name of the schema table.
287*/
danielk1977ef2cb632004-05-29 02:37:19 +0000288#define SCHEMA_TABLE(x) (x==1?TEMP_MASTER_NAME:MASTER_NAME)
drhed6c8672003-01-12 18:02:16 +0000289
290/*
drh75897232000-05-29 14:26:00 +0000291** A convenience macro that returns the number of elements in
292** an array.
293*/
294#define ArraySize(X) (sizeof(X)/sizeof(X[0]))
295
296/*
297** Forward references to structures
298*/
drh7020f652000-06-03 18:06:52 +0000299typedef struct Column Column;
drh75897232000-05-29 14:26:00 +0000300typedef struct Table Table;
301typedef struct Index Index;
302typedef struct Instruction Instruction;
303typedef 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;
drhb6c29892004-11-22 19:12:19 +0000324typedef struct Fetch Fetch;
drhd3d39e92004-05-20 22:16:29 +0000325
drh001bbcb2003-03-19 03:14:00 +0000326/*
327** Each database file to be accessed by the system is an instance
328** of the following structure. There are normally two of these structures
329** in the sqlite.aDb[] array. aDb[0] is the main database file and
drha69d9162003-04-17 22:57:53 +0000330** aDb[1] is the database file used to hold temporary tables. Additional
331** databases may be attached.
drh001bbcb2003-03-19 03:14:00 +0000332*/
333struct Db {
334 char *zName; /* Name of this database */
335 Btree *pBt; /* The B*Tree structure for this database file */
336 int schema_cookie; /* Database schema version number for this file */
drhd24cc422003-03-27 12:51:24 +0000337 Hash tblHash; /* All tables indexed by name */
338 Hash idxHash; /* All (named) indices indexed by name */
339 Hash trigHash; /* All triggers indexed by name */
340 Hash aFKey; /* Foreign keys indexed by to-table */
drhd24cc422003-03-27 12:51:24 +0000341 u16 flags; /* Flags associated with this database */
drh90f5ecb2004-07-22 01:19:35 +0000342 u8 inTrans; /* 0: not writable. 1: Transaction. 2: Checkpoint */
danielk197791cf71b2004-06-26 06:37:06 +0000343 u8 safety_level; /* How aggressive at synching data to disk */
344 int cache_size; /* Number of pages to use in the cache */
drh4794f732004-11-05 17:17:50 +0000345 Table *pSeqTab; /* The sqlite_sequence table used by AUTOINCREMENT */
346 void *pAux; /* Auxiliary data. Usually NULL */
drh4d189ca2004-02-12 18:46:38 +0000347 void (*xFreeAux)(void*); /* Routine to free pAux */
drh001bbcb2003-03-19 03:14:00 +0000348};
drh75897232000-05-29 14:26:00 +0000349
350/*
drh8bf8dc92003-05-17 17:35:10 +0000351** These macros can be used to test, set, or clear bits in the
352** Db.flags field.
353*/
354#define DbHasProperty(D,I,P) (((D)->aDb[I].flags&(P))==(P))
355#define DbHasAnyProperty(D,I,P) (((D)->aDb[I].flags&(P))!=0)
356#define DbSetProperty(D,I,P) (D)->aDb[I].flags|=(P)
357#define DbClearProperty(D,I,P) (D)->aDb[I].flags&=~(P)
358
359/*
360** Allowed values for the DB.flags field.
361**
drh8bf8dc92003-05-17 17:35:10 +0000362** The DB_SchemaLoaded flag is set after the database schema has been
363** read into internal hash tables.
364**
365** DB_UnresetViews means that one or more views have column names that
366** have been filled out. If the schema changes, these column names might
367** changes and so the view will need to be reset.
368*/
drh124b27e2004-06-19 16:06:10 +0000369#define DB_SchemaLoaded 0x0001 /* The schema has been loaded */
370#define DB_UnresetViews 0x0002 /* Some views have defined column names */
drh8bf8dc92003-05-17 17:35:10 +0000371
danielk1977dc8453f2004-06-12 00:42:34 +0000372#define SQLITE_UTF16NATIVE (SQLITE_BIGENDIAN?SQLITE_UTF16BE:SQLITE_UTF16LE)
drh8bf8dc92003-05-17 17:35:10 +0000373
374/*
drhc9b84a12002-06-20 11:36:48 +0000375** Each database is an instance of the following structure.
376**
rdcb0c374f2004-02-20 22:53:38 +0000377** The sqlite.lastRowid records the last insert rowid generated by an
378** insert statement. Inserts on views do not affect its value. Each
379** trigger has its own context, so that lastRowid can be updated inside
380** triggers as usual. The previous value will be restored once the trigger
381** exits. Upon entering a before or instead of trigger, lastRowid is no
382** longer (since after version 2.8.12) reset to -1.
383**
384** The sqlite.nChange does not count changes within triggers and keeps no
danielk19776f8a5032004-05-10 10:34:51 +0000385** context. It is reset at start of sqlite3_exec.
rdcb0c374f2004-02-20 22:53:38 +0000386** The sqlite.lsChange represents the number of changes made by the last
387** insert, update, or delete statement. It remains constant throughout the
388** length of a statement and is then updated by OP_SetCounts. It keeps a
389** context stack just like lastRowid so that the count of changes
390** within a trigger is not seen outside the trigger. Changes to views do not
391** affect the value of lsChange.
392** The sqlite.csChange keeps track of the number of current changes (since
393** the last statement) and is used to update sqlite_lsChange.
danielk19776622cce2004-05-20 11:00:52 +0000394**
395** The member variables sqlite.errCode, sqlite.zErrMsg and sqlite.zErrMsg16
396** store the most recent error code and, if applicable, string. The
397** internal function sqlite3Error() is used to set these variables
398** consistently.
drh75897232000-05-29 14:26:00 +0000399*/
drh9bb575f2004-09-06 17:24:11 +0000400struct sqlite3 {
drh001bbcb2003-03-19 03:14:00 +0000401 int nDb; /* Number of backends currently in use */
402 Db *aDb; /* All backends */
403 Db aDbStatic[2]; /* Static space for the 2 default backends */
drh5e00f6c2001-09-13 13:46:56 +0000404 int flags; /* Miscellanous flags. See below */
drh973b6e32003-02-12 14:09:42 +0000405 u8 file_format; /* What file format version is this database? */
drh90f5ecb2004-07-22 01:19:35 +0000406 u8 temp_store; /* 1: file 2: memory 0: default */
drh5e00f6c2001-09-13 13:46:56 +0000407 int nTable; /* Number of tables in the database */
danielk197724162fe2004-06-04 06:22:00 +0000408 BusyHandler busyHandler; /* Busy callback */
drhaa940ea2004-01-15 02:44:03 +0000409 void *pCommitArg; /* Argument to xCommitCallback() */
410 int (*xCommitCallback)(void*);/* Invoked at every commit. */
drh0bce8352002-02-28 00:41:10 +0000411 Hash aFunc; /* All functions that can be in SQL exprs */
drha9fd84b2004-05-18 23:21:35 +0000412 Hash aCollSeq; /* All collating sequences */
drhd3d39e92004-05-20 22:16:29 +0000413 CollSeq *pDfltColl; /* The default collating sequence (BINARY) */
drhf328bc82004-05-10 23:29:49 +0000414 i64 lastRowid; /* ROWID of most recent insert (see above) */
415 i64 priorNewRowid; /* Last randomly generated ROWID */
drh247be432002-05-10 05:44:55 +0000416 int magic; /* Magic number for detect library misuse */
danielk1977b28af712004-06-21 06:50:26 +0000417 int nChange; /* Value returned by sqlite3_changes() */
418 int nTotalChange; /* Value returned by sqlite3_total_changes() */
419 struct sqlite3InitInfo { /* Information used during initialization */
420 int iDb; /* When back is being initialized */
421 int newTnum; /* Rootpage of table being initialized */
422 u8 busy; /* TRUE if currently initializing */
drh1d85d932004-02-14 23:05:52 +0000423 } init;
drh326dce72003-01-29 14:06:07 +0000424 struct Vdbe *pVdbe; /* List of active virtual machines */
danielk19771d850a72004-05-31 08:26:49 +0000425 int activeVdbeCnt; /* Number of vdbes currently executing */
drh18de4822003-01-16 16:28:53 +0000426 void (*xTrace)(void*,const char*); /* Trace function */
427 void *pTraceArg; /* Argument to the trace function */
drhed6c8672003-01-12 18:02:16 +0000428#ifndef SQLITE_OMIT_AUTHORIZATION
drhe22a3342003-04-22 20:30:37 +0000429 int (*xAuth)(void*,int,const char*,const char*,const char*,const char*);
430 /* Access authorization function */
drhed6c8672003-01-12 18:02:16 +0000431 void *pAuthArg; /* 1st argument to the access auth function */
432#endif
danielk1977348bb5d2003-10-18 09:37:26 +0000433#ifndef SQLITE_OMIT_PROGRESS_CALLBACK
434 int (*xProgress)(void *); /* The progress callback */
435 void *pProgressArg; /* Argument to the progress callback */
436 int nProgressOps; /* Number of opcodes for progress callback */
437#endif
danielk19776622cce2004-05-20 11:00:52 +0000438 int errCode; /* Most recent error code (SQLITE_*) */
danielk1977b1bc9532004-05-22 03:05:33 +0000439 u8 enc; /* Text encoding for this database. */
danielk19771d850a72004-05-31 08:26:49 +0000440 u8 autoCommit; /* The auto-commit flag. */
danielk19777cedc8d2004-06-10 10:50:08 +0000441 void(*xCollNeeded)(void*,sqlite3*,int eTextRep,const char*);
442 void(*xCollNeeded16)(void*,sqlite3*,int eTextRep,const void*);
443 void *pCollNeededArg;
danielk1977bfd6cce2004-06-18 04:24:54 +0000444 sqlite3_value *pValue; /* Value used for transient conversions */
445 sqlite3_value *pErr; /* Most recent error message */
danielk1977bfd6cce2004-06-18 04:24:54 +0000446 char *zErrMsg; /* Most recent error message (UTF-8 encoded) */
drhb6c29892004-11-22 19:12:19 +0000447 char *zErrMsg16; /* Most recent error message (UTF-16 encoded) */
drh75897232000-05-29 14:26:00 +0000448};
449
450/*
drh8bf8dc92003-05-17 17:35:10 +0000451** Possible values for the sqlite.flags and or Db.flags fields.
452**
453** On sqlite.flags, the SQLITE_InTrans value means that we have
454** executed a BEGIN. On Db.flags, SQLITE_InTrans means a statement
455** transaction is active on that particular database file.
drh75897232000-05-29 14:26:00 +0000456*/
drh5e00f6c2001-09-13 13:46:56 +0000457#define SQLITE_VdbeTrace 0x00000001 /* True to trace VDBE execution */
458#define SQLITE_Initialized 0x00000002 /* True after initialization */
459#define SQLITE_Interrupt 0x00000004 /* Cancel current operation */
460#define SQLITE_InTrans 0x00000008 /* True if in a transaction */
461#define SQLITE_InternChanges 0x00000010 /* Uncommitted Hash table changes */
drh382c0242001-10-06 16:33:02 +0000462#define SQLITE_FullColNames 0x00000020 /* Show full column names on SELECT */
drhfcabd462004-02-20 14:50:58 +0000463#define SQLITE_ShortColNames 0x00000040 /* Show short columns names */
464#define SQLITE_CountRows 0x00000080 /* Count rows changed by INSERT, */
drh1bee3d72001-10-15 00:44:35 +0000465 /* DELETE, or UPDATE and return */
466 /* the count using a callback. */
drhfcabd462004-02-20 14:50:58 +0000467#define SQLITE_NullCallback 0x00000100 /* Invoke the callback once if the */
drh6a535342001-10-19 16:44:56 +0000468 /* result set is empty */
drh35d4c2f2004-06-10 01:30:59 +0000469#define SQLITE_SqlTrace 0x00000200 /* Debug print SQL as it executes */
470#define SQLITE_VdbeListing 0x00000400 /* Debug listings of VDBE programs */
drhf4040832004-10-22 20:29:21 +0000471#define SQLITE_WriteSchema 0x00000800 /* OK to update SQLITE_MASTER */
drh58b95762000-06-02 01:17:37 +0000472
473/*
drh247be432002-05-10 05:44:55 +0000474** Possible values for the sqlite.magic field.
475** The numbers are obtained at random and have no special meaning, other
476** than being distinct from one another.
477*/
478#define SQLITE_MAGIC_OPEN 0xa029a697 /* Database is open */
479#define SQLITE_MAGIC_CLOSED 0x9f3c2d33 /* Database is closed */
480#define SQLITE_MAGIC_BUSY 0xf03b7906 /* Database currently in use */
481#define SQLITE_MAGIC_ERROR 0xb5357930 /* An SQLITE_MISUSE error occurred */
482
483/*
drh0bce8352002-02-28 00:41:10 +0000484** Each SQL function is defined by an instance of the following
485** structure. A pointer to this structure is stored in the sqlite.aFunc
drh8e0a2f92002-02-23 23:45:45 +0000486** hash table. When multiple functions have the same name, the hash table
487** points to a linked list of these structures.
drh28037572000-08-02 13:47:41 +0000488*/
drh0bce8352002-02-28 00:41:10 +0000489struct FuncDef {
drhf9b596e2004-05-26 16:54:42 +0000490 char *zName; /* SQL name of the function */
491 int nArg; /* Number of arguments. -1 means unlimited */
danielk1977d8123362004-06-12 09:25:12 +0000492 u8 iPrefEnc; /* Preferred text encoding (SQLITE_UTF8, 16LE, 16BE) */
drhf9b596e2004-05-26 16:54:42 +0000493 void *pUserData; /* User data parameter */
494 FuncDef *pNext; /* Next function with same name */
495 void (*xFunc)(sqlite3_context*,int,sqlite3_value**); /* Regular function */
496 void (*xStep)(sqlite3_context*,int,sqlite3_value**); /* Aggregate step */
497 void (*xFinalize)(sqlite3_context*); /* Aggregate finializer */
danielk1977dc1bdc42004-06-11 10:51:27 +0000498 u8 needCollSeq; /* True if sqlite3GetFuncCollSeq() might be called */
drh8e0a2f92002-02-23 23:45:45 +0000499};
drh28037572000-08-02 13:47:41 +0000500
501/*
drh967e8b72000-06-21 13:59:10 +0000502** information about each column of an SQL table is held in an instance
drh7020f652000-06-03 18:06:52 +0000503** of this structure.
504*/
505struct Column {
drh967e8b72000-06-21 13:59:10 +0000506 char *zName; /* Name of this column */
danielk19777977a172004-11-09 12:44:37 +0000507 Expr *pDflt; /* Default value of this column */
drh382c0242001-10-06 16:33:02 +0000508 char *zType; /* Data type for this column */
drha9fd84b2004-05-18 23:21:35 +0000509 CollSeq *pColl; /* Collating sequence. If NULL, use the default */
drh4a324312001-12-21 14:30:42 +0000510 u8 notNull; /* True if there is a NOT NULL constraint */
drh78100cc2003-08-23 22:40:53 +0000511 u8 isPrimKey; /* True if this column is part of the PRIMARY KEY */
danielk1977a37cdde2004-05-16 11:15:36 +0000512 char affinity; /* One of the SQLITE_AFF_... values */
drh7020f652000-06-03 18:06:52 +0000513};
514
515/*
drha9fd84b2004-05-18 23:21:35 +0000516** A "Collating Sequence" is defined by an instance of the following
danielk19770202b292004-06-09 09:55:16 +0000517** structure. Conceptually, a collating sequence consists of a name and
518** a comparison routine that defines the order of that sequence.
drha9fd84b2004-05-18 23:21:35 +0000519**
danielk19770202b292004-06-09 09:55:16 +0000520** There may two seperate implementations of the collation function, one
521** that processes text in UTF-8 encoding (CollSeq.xCmp) and another that
522** processes text encoded in UTF-16 (CollSeq.xCmp16), using the machine
523** native byte order. When a collation sequence is invoked, SQLite selects
524** the version that will require the least expensive encoding
525** transalations, if any.
526**
527** The CollSeq.pUser member variable is an extra parameter that passed in
528** as the first argument to the UTF-8 comparison function, xCmp.
529** CollSeq.pUser16 is the equivalent for the UTF-16 comparison function,
530** xCmp16.
531**
532** If both CollSeq.xCmp and CollSeq.xCmp16 are NULL, it means that the
533** collating sequence is undefined. Indices built on an undefined
534** collating sequence may not be read or written.
drha9fd84b2004-05-18 23:21:35 +0000535*/
536struct CollSeq {
danielk19770202b292004-06-09 09:55:16 +0000537 char *zName; /* Name of the collating sequence, UTF-8 encoded */
danielk1977466be562004-06-10 02:16:01 +0000538 u8 enc; /* Text encoding handled by xCmp() */
drha9fd84b2004-05-18 23:21:35 +0000539 void *pUser; /* First argument to xCmp() */
danielk19770202b292004-06-09 09:55:16 +0000540 int (*xCmp)(void*,int, const void*, int, const void*);
drha9fd84b2004-05-18 23:21:35 +0000541};
542
543/*
drhd3d39e92004-05-20 22:16:29 +0000544** A sort order can be either ASC or DESC.
drh8e2ca022002-06-17 17:07:19 +0000545*/
drh8e2ca022002-06-17 17:07:19 +0000546#define SQLITE_SO_ASC 0 /* Sort in ascending order */
drhd3d39e92004-05-20 22:16:29 +0000547#define SQLITE_SO_DESC 1 /* Sort in ascending order */
drh8e2ca022002-06-17 17:07:19 +0000548
549/*
danielk1977a37cdde2004-05-16 11:15:36 +0000550** Column affinity types.
551*/
552#define SQLITE_AFF_INTEGER 'i'
553#define SQLITE_AFF_NUMERIC 'n'
554#define SQLITE_AFF_TEXT 't'
555#define SQLITE_AFF_NONE 'o'
556
557
558/*
drh22f70c32002-02-18 01:17:00 +0000559** Each SQL table is represented in memory by an instance of the
560** following structure.
561**
drhd24cc422003-03-27 12:51:24 +0000562** Table.zName is the name of the table. The case of the original
drh22f70c32002-02-18 01:17:00 +0000563** CREATE TABLE statement is stored, but case is not significant for
564** comparisons.
565**
drhd24cc422003-03-27 12:51:24 +0000566** Table.nCol is the number of columns in this table. Table.aCol is a
drh22f70c32002-02-18 01:17:00 +0000567** pointer to an array of Column structures, one for each column.
568**
drhd24cc422003-03-27 12:51:24 +0000569** If the table has an INTEGER PRIMARY KEY, then Table.iPKey is the index of
570** the column that is that key. Otherwise Table.iPKey is negative. Note
drh22f70c32002-02-18 01:17:00 +0000571** that the datatype of the PRIMARY KEY must be INTEGER for this field to
572** be set. An INTEGER PRIMARY KEY is used as the rowid for each row of
573** the table. If a table has no INTEGER PRIMARY KEY, then a random rowid
drhd24cc422003-03-27 12:51:24 +0000574** is generated for each row of the table. Table.hasPrimKey is true if
drh22f70c32002-02-18 01:17:00 +0000575** the table has any PRIMARY KEY, INTEGER or otherwise.
576**
drhd24cc422003-03-27 12:51:24 +0000577** Table.tnum is the page number for the root BTree page of the table in the
578** database file. If Table.iDb is the index of the database table backend
579** in sqlite.aDb[]. 0 is for the main database and 1 is for the file that
580** holds temporary tables and indices. If Table.isTransient
drh22f70c32002-02-18 01:17:00 +0000581** is true, then the table is stored in a file that is automatically deleted
drhd24cc422003-03-27 12:51:24 +0000582** when the VDBE cursor to the table is closed. In this case Table.tnum
drh22f70c32002-02-18 01:17:00 +0000583** refers VDBE cursor number that holds the table open, not to the root
584** page number. Transient tables are used to hold the results of a
585** sub-query that appears instead of a real table name in the FROM clause
586** of a SELECT statement.
drh75897232000-05-29 14:26:00 +0000587*/
588struct Table {
drh967e8b72000-06-21 13:59:10 +0000589 char *zName; /* Name of the table */
drh967e8b72000-06-21 13:59:10 +0000590 int nCol; /* Number of columns in this table */
591 Column *aCol; /* Information about each column */
drhc8392582001-12-31 02:48:51 +0000592 int iPKey; /* If not less then 0, use aCol[iPKey] as the primary key */
drh967e8b72000-06-21 13:59:10 +0000593 Index *pIndex; /* List of SQL indexes on this table. */
drh22f70c32002-02-18 01:17:00 +0000594 int tnum; /* Root BTree node for this table (see note above) */
drha76b5df2002-02-23 02:32:10 +0000595 Select *pSelect; /* NULL for tables. Points to definition if a view. */
drh717e6402001-09-27 03:22:32 +0000596 u8 readOnly; /* True if this table should not be written by the user */
drhd24cc422003-03-27 12:51:24 +0000597 u8 iDb; /* Index into sqlite.aDb[] of the backend for this table */
drh22f70c32002-02-18 01:17:00 +0000598 u8 isTransient; /* True if automatically deleted when VDBE finishes */
drh4a324312001-12-21 14:30:42 +0000599 u8 hasPrimKey; /* True if there exists a primary key */
drh9cfcf5d2002-01-29 18:41:24 +0000600 u8 keyConf; /* What to do in case of uniqueness conflict on iPKey */
drh205f48e2004-11-05 00:43:11 +0000601 u8 autoInc; /* True if the integer primary key is autoincrement */
danielk1977c3f9bad2002-05-15 08:30:12 +0000602 Trigger *pTrigger; /* List of SQL triggers on this table */
drhc2eef3b2002-08-31 18:53:06 +0000603 FKey *pFKey; /* Linked list of all foreign keys in this table */
danielk19773d1bfea2004-05-14 11:00:53 +0000604 char *zColAff; /* String defining the affinity of each column */
drh75897232000-05-29 14:26:00 +0000605};
606
607/*
drhc2eef3b2002-08-31 18:53:06 +0000608** Each foreign key constraint is an instance of the following structure.
609**
610** A foreign key is associated with two tables. The "from" table is
611** the table that contains the REFERENCES clause that creates the foreign
612** key. The "to" table is the table that is named in the REFERENCES clause.
613** Consider this example:
614**
615** CREATE TABLE ex1(
616** a INTEGER PRIMARY KEY,
617** b INTEGER CONSTRAINT fk1 REFERENCES ex2(x)
618** );
619**
620** For foreign key "fk1", the from-table is "ex1" and the to-table is "ex2".
621**
622** Each REFERENCES clause generates an instance of the following structure
623** which is attached to the from-table. The to-table need not exist when
624** the from-table is created. The existance of the to-table is not checked
625** until an attempt is made to insert data into the from-table.
626**
drhea1ba172003-04-20 00:00:23 +0000627** The sqlite.aFKey hash table stores pointers to this structure
drhc2eef3b2002-08-31 18:53:06 +0000628** given the name of a to-table. For each to-table, all foreign keys
629** associated with that table are on a linked list using the FKey.pNextTo
630** field.
631*/
632struct FKey {
633 Table *pFrom; /* The table that constains the REFERENCES clause */
634 FKey *pNextFrom; /* Next foreign key in pFrom */
635 char *zTo; /* Name of table that the key points to */
636 FKey *pNextTo; /* Next foreign key that points to zTo */
637 int nCol; /* Number of columns in this key */
638 struct sColMap { /* Mapping of columns in pFrom to columns in zTo */
639 int iFrom; /* Index of column in pFrom */
640 char *zCol; /* Name of column in zTo. If 0 use PRIMARY KEY */
641 } *aCol; /* One entry for each of nCol column s */
642 u8 isDeferred; /* True if constraint checking is deferred till COMMIT */
643 u8 updateConf; /* How to resolve conflicts that occur on UPDATE */
644 u8 deleteConf; /* How to resolve conflicts that occur on DELETE */
645 u8 insertConf; /* How to resolve conflicts that occur on INSERT */
646};
647
648/*
649** SQLite supports many different ways to resolve a contraint
drh22f70c32002-02-18 01:17:00 +0000650** error. ROLLBACK processing means that a constraint violation
drh0bd1f4e2002-06-06 18:54:39 +0000651** causes the operation in process to fail and for the current transaction
drh1c928532002-01-31 15:54:21 +0000652** to be rolled back. ABORT processing means the operation in process
653** fails and any prior changes from that one operation are backed out,
654** but the transaction is not rolled back. FAIL processing means that
655** the operation in progress stops and returns an error code. But prior
656** changes due to the same operation are not backed out and no rollback
657** occurs. IGNORE means that the particular row that caused the constraint
658** error is not inserted or updated. Processing continues and no error
659** is returned. REPLACE means that preexisting database rows that caused
660** a UNIQUE constraint violation are removed so that the new insert or
661** update can proceed. Processing continues and no error is reported.
drhc2eef3b2002-08-31 18:53:06 +0000662**
663** RESTRICT, SETNULL, and CASCADE actions apply only to foreign keys.
664** RESTRICT is the same as ABORT for IMMEDIATE foreign keys and the
665** same as ROLLBACK for DEFERRED keys. SETNULL means that the foreign
666** key is set to NULL. CASCADE means that a DELETE or UPDATE of the
667** referenced table row is propagated into the row that holds the
668** foreign key.
drh1c928532002-01-31 15:54:21 +0000669**
drh968af522003-02-11 14:55:40 +0000670** The following symbolic values are used to record which type
drh1c928532002-01-31 15:54:21 +0000671** of action to take.
drh9cfcf5d2002-01-29 18:41:24 +0000672*/
drh1c928532002-01-31 15:54:21 +0000673#define OE_None 0 /* There is no constraint to check */
674#define OE_Rollback 1 /* Fail the operation and rollback the transaction */
675#define OE_Abort 2 /* Back out changes but do no rollback transaction */
676#define OE_Fail 3 /* Stop the operation but leave all prior changes */
677#define OE_Ignore 4 /* Ignore the error. Do not do the INSERT or UPDATE */
678#define OE_Replace 5 /* Delete existing record, then do INSERT or UPDATE */
drhc2eef3b2002-08-31 18:53:06 +0000679
680#define OE_Restrict 6 /* OE_Abort for IMMEDIATE, OE_Rollback for DEFERRED */
681#define OE_SetNull 7 /* Set the foreign key value to NULL */
682#define OE_SetDflt 8 /* Set the foreign key value to its default */
683#define OE_Cascade 9 /* Cascade the changes */
684
685#define OE_Default 99 /* Do whatever the default action is */
drh9cfcf5d2002-01-29 18:41:24 +0000686
drhd3d39e92004-05-20 22:16:29 +0000687
688/*
689** An instance of the following structure is passed as the first
690** argument to sqlite3VdbeKeyCompare and is used to control the
691** comparison of the two index keys.
692**
693** If the KeyInfo.incrKey value is true and the comparison would
694** otherwise be equal, then return a result as if the second key larger.
695*/
696struct KeyInfo {
danielk1977b1bc9532004-05-22 03:05:33 +0000697 u8 enc; /* Text encoding - one of the TEXT_Utf* values */
drhd3d39e92004-05-20 22:16:29 +0000698 u8 incrKey; /* Increase 2nd key by epsilon before comparison */
699 int nField; /* Number of entries in aColl[] */
drhffbc3082004-05-21 01:29:06 +0000700 u8 *aSortOrder; /* If defined an aSortOrder[i] is true, sort DESC */
drhd3d39e92004-05-20 22:16:29 +0000701 CollSeq *aColl[1]; /* Collating sequence for each term of the key */
702};
703
drh9cfcf5d2002-01-29 18:41:24 +0000704/*
drh66b89c82000-11-28 20:47:17 +0000705** Each SQL index is represented in memory by an
drh75897232000-05-29 14:26:00 +0000706** instance of the following structure.
drh967e8b72000-06-21 13:59:10 +0000707**
708** The columns of the table that are to be indexed are described
709** by the aiColumn[] field of this structure. For example, suppose
710** we have the following table and index:
711**
712** CREATE TABLE Ex1(c1 int, c2 int, c3 text);
713** CREATE INDEX Ex2 ON Ex1(c3,c1);
714**
715** In the Table structure describing Ex1, nCol==3 because there are
716** three columns in the table. In the Index structure describing
717** Ex2, nColumn==2 since 2 of the 3 columns of Ex1 are indexed.
718** The value of aiColumn is {2, 0}. aiColumn[0]==2 because the
719** first column to be indexed (c3) has an index of 2 in Ex1.aCol[].
720** The second column to be indexed (c1) has an index of 0 in
721** Ex1.aCol[], hence Ex2.aiColumn[1]==0.
drhea1ba172003-04-20 00:00:23 +0000722**
723** The Index.onError field determines whether or not the indexed columns
724** must be unique and what to do if they are not. When Index.onError=OE_None,
725** it means this is not a unique index. Otherwise it is a unique index
726** and the value of Index.onError indicate the which conflict resolution
727** algorithm to employ whenever an attempt is made to insert a non-unique
728** element.
drh75897232000-05-29 14:26:00 +0000729*/
730struct Index {
drh967e8b72000-06-21 13:59:10 +0000731 char *zName; /* Name of this index */
drh967e8b72000-06-21 13:59:10 +0000732 int nColumn; /* Number of columns in the table used by this index */
733 int *aiColumn; /* Which columns are used by this index. 1st is 0 */
734 Table *pTable; /* The SQL table being indexed */
drhbe0072d2001-09-13 14:46:09 +0000735 int tnum; /* Page containing root of this index in database file */
drh9cfcf5d2002-01-29 18:41:24 +0000736 u8 onError; /* OE_Abort, OE_Ignore, OE_Replace, or OE_None */
drh485b39b2002-07-13 03:11:52 +0000737 u8 autoIndex; /* True if is automatically created (ex: by UNIQUE) */
drhd24cc422003-03-27 12:51:24 +0000738 u8 iDb; /* Index in sqlite.aDb[] of where this index is stored */
danielk1977a37cdde2004-05-16 11:15:36 +0000739 char *zColAff; /* String defining the affinity of each column */
drh967e8b72000-06-21 13:59:10 +0000740 Index *pNext; /* The next index associated with the same table */
drhd3d39e92004-05-20 22:16:29 +0000741 KeyInfo keyInfo; /* Info on how to order keys. MUST BE LAST */
drh75897232000-05-29 14:26:00 +0000742};
743
744/*
745** Each token coming out of the lexer is an instance of
drh4b59ab52002-08-24 18:24:51 +0000746** this structure. Tokens are also used as part of an expression.
drh4efc4752004-01-16 15:55:37 +0000747**
748** Note if Token.z==0 then Token.dyn and Token.n are undefined and
749** may contain random values. Do not make any assuptions about Token.dyn
750** and Token.n when Token.z==0.
drh75897232000-05-29 14:26:00 +0000751*/
752struct Token {
drh4c755c02004-08-08 20:22:17 +0000753 const unsigned char *z; /* Text of the token. Not NULL-terminated! */
754 unsigned dyn : 1; /* True for malloced memory, false for static */
755 unsigned n : 31; /* Number of characters in this token */
drh75897232000-05-29 14:26:00 +0000756};
757
758/*
759** Each node of an expression in the parse tree is an instance
drh22f70c32002-02-18 01:17:00 +0000760** of this structure.
761**
762** Expr.op is the opcode. The integer parser token codes are reused
763** as opcodes here. For example, the parser defines TK_GE to be an integer
764** code representing the ">=" operator. This same integer code is reused
765** to represent the greater-than-or-equal-to operator in the expression
766** tree.
767**
768** Expr.pRight and Expr.pLeft are subexpressions. Expr.pList is a list
769** of argument if the expression is a function.
770**
drh4b59ab52002-08-24 18:24:51 +0000771** Expr.token is the operator token for this node. For some expressions
772** that have subexpressions, Expr.token can be the complete text that gave
773** rise to the Expr. In the latter case, the token is marked as being
774** a compound token.
drh22f70c32002-02-18 01:17:00 +0000775**
776** An expression of the form ID or ID.ID refers to a column in a table.
777** For such expressions, Expr.op is set to TK_COLUMN and Expr.iTable is
778** the integer cursor number of a VDBE cursor pointing to that table and
779** Expr.iColumn is the column number for the specific column. If the
780** expression is used as a result in an aggregate SELECT, then the
781** value is also stored in the Expr.iAgg column in the aggregate so that
782** it can be accessed after all aggregates are computed.
783**
784** If the expression is a function, the Expr.iTable is an integer code
drh7c972de2003-09-06 22:18:07 +0000785** representing which function. If the expression is an unbound variable
786** marker (a question mark character '?' in the original SQL) then the
787** Expr.iTable holds the index number for that variable.
drh22f70c32002-02-18 01:17:00 +0000788**
drh1398ad32005-01-19 23:24:50 +0000789** If the expression is a subquery then Expr.iColumn holds an integer
790** register number containing the result of the subquery. If the
791** subquery gives a constant result, then iTable is -1. If the subquery
792** gives a different answer at different times during statement processing
793** then iTable is the address of a subroutine that computes the subquery.
794**
drh22f70c32002-02-18 01:17:00 +0000795** The Expr.pSelect field points to a SELECT statement. The SELECT might
796** be the right operand of an IN operator. Or, if a scalar SELECT appears
797** in an expression the opcode is TK_SELECT and Expr.pSelect is the only
798** operand.
drh75897232000-05-29 14:26:00 +0000799*/
800struct Expr {
drh1cc093c2002-06-24 22:01:57 +0000801 u8 op; /* Operation performed by this node */
drha9fd84b2004-05-18 23:21:35 +0000802 char affinity; /* The affinity of the column or 0 if not a column */
drhb5a20d32003-04-23 12:25:23 +0000803 u8 iDb; /* Database referenced by this expression */
drhe22a3342003-04-22 20:30:37 +0000804 u8 flags; /* Various flags. See below */
drhf2bc0132004-10-04 13:19:23 +0000805 CollSeq *pColl; /* The collation type of the column or 0 */
drh75897232000-05-29 14:26:00 +0000806 Expr *pLeft, *pRight; /* Left and right subnodes */
drhd99f7062002-06-08 23:25:08 +0000807 ExprList *pList; /* A list of expressions used as function arguments
808 ** or in "<expr> IN (<expr-list)" */
drh75897232000-05-29 14:26:00 +0000809 Token token; /* An operand token */
drh6977fea2002-10-22 23:38:04 +0000810 Token span; /* Complete text of the expression */
drh967e8b72000-06-21 13:59:10 +0000811 int iTable, iColumn; /* When op==TK_COLUMN, then this expr node means the
drh8e2ca022002-06-17 17:07:19 +0000812 ** iColumn-th field of the iTable-th table. */
drh967e8b72000-06-21 13:59:10 +0000813 int iAgg; /* When op==TK_COLUMN and pParse->useAgg==TRUE, pull
814 ** result from the iAgg-th element of the aggregator */
drhd99f7062002-06-08 23:25:08 +0000815 Select *pSelect; /* When the expression is a sub-select. Also the
816 ** right side of "<expr> IN (<select>)" */
drh75897232000-05-29 14:26:00 +0000817};
818
819/*
drh1f162302002-10-27 19:35:33 +0000820** The following are the meanings of bits in the Expr.flags field.
821*/
822#define EP_FromJoin 0x0001 /* Originated in ON or USING clause of a join */
drh626a8792005-01-17 22:08:19 +0000823#define EP_Agg 0x0002 /* Contains one or more aggregate functions */
824#define EP_Resolved 0x0004 /* IDs have been resolved to COLUMNs */
drh73b211a2005-01-18 04:00:42 +0000825#define EP_Error 0x0008 /* Expression contains one or more errors */
drh51522cd2005-01-20 13:36:19 +0000826#define EP_Not 0x0010 /* Operator preceeded by NOT */
danielk1977b3bce662005-01-29 08:32:43 +0000827#define EP_VarSelect 0x0020 /* pSelect is correlated, not constant */
drh1f162302002-10-27 19:35:33 +0000828
829/*
830** These macros can be used to test, set, or clear bits in the
831** Expr.flags field.
832*/
833#define ExprHasProperty(E,P) (((E)->flags&(P))==(P))
834#define ExprHasAnyProperty(E,P) (((E)->flags&(P))!=0)
835#define ExprSetProperty(E,P) (E)->flags|=(P)
836#define ExprClearProperty(E,P) (E)->flags&=~(P)
837
838/*
drh75897232000-05-29 14:26:00 +0000839** A list of expressions. Each expression may optionally have a
840** name. An expr/name combination can be used in several ways, such
841** as the list of "expr AS ID" fields following a "SELECT" or in the
842** list of "ID = expr" items in an UPDATE. A list of expressions can
drhad3cab52002-05-24 02:04:32 +0000843** also be used as the argument to a function, in which case the a.zName
drh75897232000-05-29 14:26:00 +0000844** field is not used.
845*/
846struct ExprList {
847 int nExpr; /* Number of expressions on the list */
drh4305d102003-07-30 12:34:12 +0000848 int nAlloc; /* Number of entries allocated below */
drh6d4abfb2001-10-22 02:58:08 +0000849 struct ExprList_item {
drh75897232000-05-29 14:26:00 +0000850 Expr *pExpr; /* The list of expressions */
851 char *zName; /* Token associated with this expression */
drh8e2ca022002-06-17 17:07:19 +0000852 u8 sortOrder; /* 1 for DESC or 0 for ASC */
853 u8 isAgg; /* True if this is an aggregate like count(*) */
854 u8 done; /* A flag to indicate when processing is finished */
drh75897232000-05-29 14:26:00 +0000855 } *a; /* One entry for each expression */
856};
857
858/*
drhad3cab52002-05-24 02:04:32 +0000859** An instance of this structure can hold a simple list of identifiers,
860** such as the list "a,b,c" in the following statements:
861**
862** INSERT INTO t(a,b,c) VALUES ...;
863** CREATE INDEX idx ON t(a,b,c);
864** CREATE TRIGGER trig BEFORE UPDATE ON t(a,b,c) ...;
865**
866** The IdList.a.idx field is used when the IdList represents the list of
867** column names after a table name in an INSERT statement. In the statement
868**
869** INSERT INTO t(a,b,c) ...
870**
871** If "a" is the k-th column of table "t", then IdList.a[0].idx==k.
drh75897232000-05-29 14:26:00 +0000872*/
873struct IdList {
874 int nId; /* Number of identifiers on the list */
drh4305d102003-07-30 12:34:12 +0000875 int nAlloc; /* Number of entries allocated for a[] below */
drh6d4abfb2001-10-22 02:58:08 +0000876 struct IdList_item {
drhad3cab52002-05-24 02:04:32 +0000877 char *zName; /* Name of the identifier */
drh967e8b72000-06-21 13:59:10 +0000878 int idx; /* Index in some Table.aCol[] of a column named zName */
drhad3cab52002-05-24 02:04:32 +0000879 } *a;
880};
881
882/*
drh51669862004-12-18 18:40:26 +0000883** The bitmask datatype defined below is used for various optimizations.
884*/
885typedef unsigned int Bitmask;
886
887/*
drhad3cab52002-05-24 02:04:32 +0000888** The following structure describes the FROM clause of a SELECT statement.
889** Each table or subquery in the FROM clause is a separate element of
890** the SrcList.a[] array.
drhd24cc422003-03-27 12:51:24 +0000891**
892** With the addition of multiple database support, the following structure
893** can also be used to describe a particular table such as the table that
894** is modified by an INSERT, DELETE, or UPDATE statement. In standard SQL,
895** such a table must be a simple name: ID. But in SQLite, the table can
896** now be identified by a database name, a dot, then the table name: ID.ID.
drhad3cab52002-05-24 02:04:32 +0000897*/
898struct SrcList {
drh939a16d2004-07-15 13:37:22 +0000899 i16 nSrc; /* Number of tables or subqueries in the FROM clause */
900 i16 nAlloc; /* Number of entries allocated in a[] below */
drhad3cab52002-05-24 02:04:32 +0000901 struct SrcList_item {
drh113088e2003-03-20 01:16:58 +0000902 char *zDatabase; /* Name of database holding this table */
drhad3cab52002-05-24 02:04:32 +0000903 char *zName; /* Name of the table */
904 char *zAlias; /* The "B" part of a "A AS B" phrase. zName is the "A" */
drhdaffd0e2001-04-11 14:28:42 +0000905 Table *pTab; /* An SQL table corresponding to zName */
906 Select *pSelect; /* A SELECT statement used in place of a table name */
drhad3cab52002-05-24 02:04:32 +0000907 int jointype; /* Type of join between this table and the next */
drh63eb5f22003-04-29 16:20:44 +0000908 int iCursor; /* The VDBE cursor number used to access this table */
drhad3cab52002-05-24 02:04:32 +0000909 Expr *pOn; /* The ON clause of a join */
910 IdList *pUsing; /* The USING clause of a join */
drh51669862004-12-18 18:40:26 +0000911 Bitmask colUsed; /* Bit N (1<<N) set if column N or pTab is used */
drh113088e2003-03-20 01:16:58 +0000912 } a[1]; /* One entry for each identifier on the list */
drh75897232000-05-29 14:26:00 +0000913};
914
915/*
drh01f3f252002-05-24 16:14:15 +0000916** Permitted values of the SrcList.a.jointype field
917*/
918#define JT_INNER 0x0001 /* Any kind of inner or cross join */
919#define JT_NATURAL 0x0002 /* True for a "natural" join */
drh195e6962002-05-25 00:18:20 +0000920#define JT_LEFT 0x0004 /* Left outer join */
921#define JT_RIGHT 0x0008 /* Right outer join */
drh01f3f252002-05-24 16:14:15 +0000922#define JT_OUTER 0x0010 /* The "OUTER" keyword is present */
923#define JT_ERROR 0x0020 /* unknown or unsupported join type */
924
925/*
drh6b563442001-11-07 16:48:26 +0000926** For each nested loop in a WHERE clause implementation, the WhereInfo
927** structure contains a single instance of this structure. This structure
928** is intended to be private the the where.c module and should not be
929** access or modified by other modules.
930*/
931struct WhereLevel {
932 int iMem; /* Memory cell used by this level */
drh9012bcb2004-12-19 00:11:35 +0000933 Index *pIdx; /* Index used. NULL if no index */
934 int iTabCur; /* The VDBE cursor used to access the table */
935 int iIdxCur; /* The VDBE cursor used to acesss pIdx */
drhacf3b982005-01-03 01:27:18 +0000936 int score; /* How well this index scored */
drh6b563442001-11-07 16:48:26 +0000937 int brk; /* Jump here to break out of the loop */
938 int cont; /* Jump here to continue with the next loop cycle */
939 int op, p1, p2; /* Opcode used to terminate the loop */
drhad2d8302002-05-24 20:31:36 +0000940 int iLeftJoin; /* Memory cell used to implement LEFT OUTER JOIN */
941 int top; /* First instruction of interior of the loop */
drhd99f7062002-06-08 23:25:08 +0000942 int inOp, inP1, inP2;/* Opcode used to implement an IN operator */
drhc045ec52002-12-04 20:01:06 +0000943 int bRev; /* Do the scan in the reverse direction */
drh6b563442001-11-07 16:48:26 +0000944};
945
946/*
drh75897232000-05-29 14:26:00 +0000947** The WHERE clause processing routine has two halves. The
948** first part does the start of the WHERE loop and the second
949** half does the tail of the WHERE loop. An instance of
950** this structure is returned by the first half and passed
951** into the second half to give some continuity.
952*/
953struct WhereInfo {
954 Parse *pParse;
drhad3cab52002-05-24 02:04:32 +0000955 SrcList *pTabList; /* List of tables in the join */
drh9012bcb2004-12-19 00:11:35 +0000956 int iTop; /* The very beginning of the WHERE loop */
drh19a775c2000-06-05 18:54:46 +0000957 int iContinue; /* Jump here to continue with next record */
958 int iBreak; /* Jump here to break out of the loop */
drh6b563442001-11-07 16:48:26 +0000959 int nLevel; /* Number of nested loop */
960 WhereLevel a[1]; /* Information about each nest loop in the WHERE */
drh75897232000-05-29 14:26:00 +0000961};
962
963/*
danielk1977b3bce662005-01-29 08:32:43 +0000964** A NameContext defines a context in which to resolve table and column
965** names. The context consists of a list of tables (the pSrcList) field and
966** a list of named expression (pEList). The named expression list may
967** be NULL. The pSrc corresponds to the FROM clause of a SELECT or
968** to the table being operated on by INSERT, UPDATE, or DELETE. The
969** pEList corresponds to the result set of a SELECT and is NULL for
970** other statements.
971**
972** NameContexts can be nested. When resolving names, the inner-most
973** context is searched first. If no match is found, the next outer
974** context is checked. If there is still no match, the next context
975** is checked. This process continues until either a match is found
976** or all contexts are check. When a match is found, the nRef member of
977** the context containing the match is incremented.
978**
979** Each subquery gets a new NameContext. The pNext field points to the
980** NameContext in the parent query. Thus the process of scanning the
981** NameContext list corresponds to searching through successively outer
982** subqueries looking for a match.
983*/
984struct NameContext {
985 Parse *pParse; /* The parser */
986 SrcList *pSrcList; /* One or more tables used to resolve names */
987 ExprList *pEList; /* Optional list of named expressions */
988 int nRef; /* Number of names resolved by this context */
989 int nErr; /* Number of errors encountered while resolving names */
990 u8 allowAgg; /* Aggregate functions allowed here */
991 u8 hasAgg;
992 int nDepth; /* Depth of subquery recursion. 1 for no recursion */
993 NameContext *pNext; /* Next outer name context. NULL for outermost */
994};
995
996/*
drh9bb61fe2000-06-05 16:01:39 +0000997** An instance of the following structure contains all information
998** needed to generate code for a single SELECT statement.
drha76b5df2002-02-23 02:32:10 +0000999**
drhd11d3822002-06-21 23:01:49 +00001000** nLimit is set to -1 if there is no LIMIT clause. nOffset is set to 0.
1001** If there is a LIMIT clause, the parser sets nLimit to the value of the
1002** limit and nOffset to the value of the offset (or 0 if there is not
1003** offset). But later on, nLimit and nOffset become the memory locations
1004** in the VDBE that record the limit and offset counters.
drh9bb61fe2000-06-05 16:01:39 +00001005*/
1006struct Select {
drh9bb61fe2000-06-05 16:01:39 +00001007 ExprList *pEList; /* The fields of the result */
drh7b58dae2003-07-20 01:16:46 +00001008 u8 op; /* One of: TK_UNION TK_ALL TK_INTERSECT TK_EXCEPT */
1009 u8 isDistinct; /* True if the DISTINCT keyword is present */
drhad3cab52002-05-24 02:04:32 +00001010 SrcList *pSrc; /* The FROM clause */
drh9bb61fe2000-06-05 16:01:39 +00001011 Expr *pWhere; /* The WHERE clause */
1012 ExprList *pGroupBy; /* The GROUP BY clause */
1013 Expr *pHaving; /* The HAVING clause */
1014 ExprList *pOrderBy; /* The ORDER BY clause */
drh967e8b72000-06-21 13:59:10 +00001015 Select *pPrior; /* Prior select in a compound select statement */
danielk1977a2dc3b12005-02-05 12:48:48 +00001016 Expr *pLimit; /* LIMIT expression. NULL means not used. */
1017 Expr *pOffset; /* OFFSET expression. NULL means not used. */
drh7b58dae2003-07-20 01:16:46 +00001018 int iLimit, iOffset; /* Memory registers holding LIMIT & OFFSET counters */
danielk1977dc1bdc42004-06-11 10:51:27 +00001019 IdList **ppOpenTemp; /* OP_OpenTemp addresses used by multi-selects */
drhb6c29892004-11-22 19:12:19 +00001020 Fetch *pFetch; /* If this stmt is part of a FETCH command */
danielk1977b3bce662005-01-29 08:32:43 +00001021 u8 isResolved; /* True once sqlite3SelectResolve() has run. */
1022 u8 isAgg; /* True if this is an aggregate query */
drh9bb61fe2000-06-05 16:01:39 +00001023};
1024
1025/*
drhfef52082000-06-06 01:50:43 +00001026** The results of a select can be distributed in several ways.
1027*/
1028#define SRT_Callback 1 /* Invoke a callback with each row of result */
1029#define SRT_Mem 2 /* Store result in a memory cell */
drh82c3d632000-06-06 21:56:07 +00001030#define SRT_Set 3 /* Store result as unique keys in a table */
1031#define SRT_Union 5 /* Store result as keys in a table */
1032#define SRT_Except 6 /* Remove result from a UNION table */
drh5974a302000-06-07 14:42:26 +00001033#define SRT_Table 7 /* Store result as data with a unique key */
drh2d0794e2002-03-03 03:03:52 +00001034#define SRT_TempTable 8 /* Store result in a trasient table */
drhd7489c32002-05-27 12:24:48 +00001035#define SRT_Discard 9 /* Do not save the results anywhere */
drhf46f9052002-06-22 02:33:38 +00001036#define SRT_Sorter 10 /* Store results in the sorter */
drh142e30d2002-08-28 03:00:58 +00001037#define SRT_Subroutine 11 /* Call a subroutine to handle results */
drh51522cd2005-01-20 13:36:19 +00001038#define SRT_Exists 12 /* Put 0 or 1 in a memory cell */
drhfef52082000-06-06 01:50:43 +00001039
1040/*
drh22827922000-06-06 17:27:05 +00001041** When a SELECT uses aggregate functions (like "count(*)" or "avg(f1)")
1042** we have to do some additional analysis of expressions. An instance
1043** of the following structure holds information about a single subexpression
1044** somewhere in the SELECT statement. An array of these structures holds
1045** all the information we need to generate code for aggregate
1046** expressions.
1047**
1048** Note that when analyzing a SELECT containing aggregates, both
1049** non-aggregate field variables and aggregate functions are stored
1050** in the AggExpr array of the Parser structure.
1051**
1052** The pExpr field points to an expression that is part of either the
1053** field list, the GROUP BY clause, the HAVING clause or the ORDER BY
1054** clause. The expression will be freed when those clauses are cleaned
1055** up. Do not try to delete the expression attached to AggExpr.pExpr.
1056**
1057** If AggExpr.pExpr==0, that means the expression is "count(*)".
1058*/
1059struct AggExpr {
1060 int isAgg; /* if TRUE contains an aggregate function */
1061 Expr *pExpr; /* The expression */
drh0bce8352002-02-28 00:41:10 +00001062 FuncDef *pFunc; /* Information about the aggregate function */
drh22827922000-06-06 17:27:05 +00001063};
1064
1065/*
drhf57b3392001-10-08 13:22:32 +00001066** An SQL parser context. A copy of this structure is passed through
1067** the parser and down into all the parser action routine in order to
1068** carry around information that is global to the entire parse.
drhf1974842004-11-05 03:56:00 +00001069**
1070** The structure is divided into two parts. When the parser and code
1071** generate call themselves recursively, the first part of the structure
1072** is constant but the second part is reset at the beginning and end of
1073** each recursion.
drh75897232000-05-29 14:26:00 +00001074*/
1075struct Parse {
drh9bb575f2004-09-06 17:24:11 +00001076 sqlite3 *db; /* The main database structure */
drh4c504392000-10-16 22:06:40 +00001077 int rc; /* Return code from execution */
drh75897232000-05-29 14:26:00 +00001078 char *zErrMsg; /* An error message */
drh75897232000-05-29 14:26:00 +00001079 Vdbe *pVdbe; /* An engine for executing database bytecode */
drh836faa42003-01-11 13:30:57 +00001080 u8 colNamesSet; /* TRUE after OP_ColumnName has been issued to pVdbe */
drhe0bc4042002-06-25 01:09:11 +00001081 u8 nameClash; /* A permanent table name clashes with temp table name */
drha6ecd332004-06-10 00:29:09 +00001082 u8 checkSchema; /* Causes schema cookie check after an error */
drh205f48e2004-11-05 00:43:11 +00001083 u8 nested; /* Number of nested calls to the parser/code generator */
drh75897232000-05-29 14:26:00 +00001084 int nErr; /* Number of errors seen */
drh832508b2002-03-02 17:04:07 +00001085 int nTab; /* Number of previously allocated VDBE cursors */
drh19a775c2000-06-05 18:54:46 +00001086 int nMem; /* Number of memory cells used so far */
drhfef52082000-06-06 01:50:43 +00001087 int nSet; /* Number of sets used so far */
drh80242052004-06-09 00:48:12 +00001088 u32 cookieMask; /* Bitmask of schema verified databases */
1089 int cookieValue[MAX_ATTACHED+2]; /* Values of cookies to verify */
1090 int cookieGoto; /* Address of OP_Goto to cookie verifier subroutine */
1091 u32 writeMask; /* Start a write transaction on these databases */
danielk1977b3bce662005-01-29 08:32:43 +00001092 u8 useAgg; /* If true, extract field values from the aggregator
1093 ** while generating expressions. Normally false */
drhf1974842004-11-05 03:56:00 +00001094
1095 /* Above is constant between recursions. Below is reset before and after
1096 ** each recursion */
1097
1098 int nVar; /* Number of '?' variables seen in the SQL so far */
1099 int nVarExpr; /* Number of used slots in apVarExpr[] */
1100 int nVarExprAlloc; /* Number of allocated slots in apVarExpr[] */
1101 Expr **apVarExpr; /* Pointers to :aaa and $aaaa wildcard expressions */
1102 u8 explain; /* True if the EXPLAIN flag is found on the query */
drhf1974842004-11-05 03:56:00 +00001103 Token sErrToken; /* The token at which the error occurred */
1104 Token sNameToken; /* Token with unqualified schema object name */
1105 Token sLastToken; /* The last token parsed */
1106 const char *zSql; /* All SQL text */
1107 const char *zTail; /* All SQL text past the last semicolon parsed */
1108 Table *pNewTable; /* A table being constructed by CREATE TABLE */
1109 Trigger *pNewTrigger; /* Trigger under construct by a CREATE TRIGGER */
1110 TriggerStack *trigStack; /* Trigger actions being coded */
1111 const char *zAuthContext; /* The 6th parameter to db->xAuth callbacks */
danielk1977b3bce662005-01-29 08:32:43 +00001112 int nAgg; /* Number of aggregate expressions */
1113 AggExpr *aAgg; /* An array of aggregate expressions */
1114 int nMaxDepth; /* Maximum depth of subquery recursion */
drh75897232000-05-29 14:26:00 +00001115};
1116
danielk1977d99bc932002-05-16 00:13:12 +00001117/*
drh85e20962003-04-25 17:52:11 +00001118** An instance of the following structure can be declared on a stack and used
1119** to save the Parse.zAuthContext value so that it can be restored later.
1120*/
1121struct AuthContext {
1122 const char *zAuthContext; /* Put saved Parse.zAuthContext here */
1123 Parse *pParse; /* The Parse structure */
1124};
1125
1126/*
rdcb0c374f2004-02-20 22:53:38 +00001127** Bitfield flags for P2 value in OP_PutIntKey and OP_Delete
1128*/
1129#define OPFLAG_NCHANGE 1 /* Set to update db->nChange */
1130#define OPFLAG_LASTROWID 2 /* Set to update db->lastRowid */
rdcb0c374f2004-02-20 22:53:38 +00001131
1132/*
danielk1977d99bc932002-05-16 00:13:12 +00001133 * Each trigger present in the database schema is stored as an instance of
1134 * struct Trigger.
1135 *
1136 * Pointers to instances of struct Trigger are stored in two ways.
drh9bb575f2004-09-06 17:24:11 +00001137 * 1. In the "trigHash" hash table (part of the sqlite3* that represents the
danielk1977d99bc932002-05-16 00:13:12 +00001138 * database). This allows Trigger structures to be retrieved by name.
1139 * 2. All triggers associated with a single table form a linked list, using the
drhad3cab52002-05-24 02:04:32 +00001140 * pNext member of struct Trigger. A pointer to the first element of the
1141 * linked list is stored as the "pTrigger" member of the associated
1142 * struct Table.
danielk1977d99bc932002-05-16 00:13:12 +00001143 *
drhad3cab52002-05-24 02:04:32 +00001144 * The "step_list" member points to the first element of a linked list
1145 * containing the SQL statements specified as the trigger program.
danielk1977d99bc932002-05-16 00:13:12 +00001146 */
danielk1977c3f9bad2002-05-15 08:30:12 +00001147struct Trigger {
drhdc379452002-05-15 12:45:43 +00001148 char *name; /* The name of the trigger */
1149 char *table; /* The table or view to which the trigger applies */
drhf0f258b2003-04-21 18:48:45 +00001150 u8 iDb; /* Database containing this trigger */
drh79a519c2003-05-17 19:04:03 +00001151 u8 iTabDb; /* Database containing Trigger.table */
drhf0f258b2003-04-21 18:48:45 +00001152 u8 op; /* One of TK_DELETE, TK_UPDATE, TK_INSERT */
drhdca76842004-12-07 14:06:13 +00001153 u8 tr_tm; /* One of TRIGGER_BEFORE, TRIGGER_AFTER */
drhdc379452002-05-15 12:45:43 +00001154 Expr *pWhen; /* The WHEN clause of the expresion (may be NULL) */
1155 IdList *pColumns; /* If this is an UPDATE OF <column-list> trigger,
danielk1977d99bc932002-05-16 00:13:12 +00001156 the <column-list> is stored here */
drhdc379452002-05-15 12:45:43 +00001157 int foreach; /* One of TK_ROW or TK_STATEMENT */
drh4312db52003-06-03 01:47:11 +00001158 Token nameToken; /* Token containing zName. Use during parsing only */
danielk1977c3f9bad2002-05-15 08:30:12 +00001159
drhdc379452002-05-15 12:45:43 +00001160 TriggerStep *step_list; /* Link list of trigger program steps */
drhdc379452002-05-15 12:45:43 +00001161 Trigger *pNext; /* Next trigger associated with the table */
danielk1977c3f9bad2002-05-15 08:30:12 +00001162};
1163
danielk1977d99bc932002-05-16 00:13:12 +00001164/*
drhdca76842004-12-07 14:06:13 +00001165** A trigger is either a BEFORE or an AFTER trigger. The following constants
1166** determine which.
1167**
1168** If there are multiple triggers, you might of some BEFORE and some AFTER.
1169** In that cases, the constants below can be ORed together.
1170*/
1171#define TRIGGER_BEFORE 1
1172#define TRIGGER_AFTER 2
1173
1174/*
danielk1977d99bc932002-05-16 00:13:12 +00001175 * An instance of struct TriggerStep is used to store a single SQL statement
1176 * that is a part of a trigger-program.
1177 *
1178 * Instances of struct TriggerStep are stored in a singly linked list (linked
1179 * using the "pNext" member) referenced by the "step_list" member of the
1180 * associated struct Trigger instance. The first element of the linked list is
1181 * the first step of the trigger-program.
1182 *
1183 * The "op" member indicates whether this is a "DELETE", "INSERT", "UPDATE" or
1184 * "SELECT" statement. The meanings of the other members is determined by the
1185 * value of "op" as follows:
1186 *
1187 * (op == TK_INSERT)
1188 * orconf -> stores the ON CONFLICT algorithm
1189 * pSelect -> If this is an INSERT INTO ... SELECT ... statement, then
1190 * this stores a pointer to the SELECT statement. Otherwise NULL.
1191 * target -> A token holding the name of the table to insert into.
1192 * pExprList -> If this is an INSERT INTO ... VALUES ... statement, then
1193 * this stores values to be inserted. Otherwise NULL.
1194 * pIdList -> If this is an INSERT INTO ... (<column-names>) VALUES ...
drhad3cab52002-05-24 02:04:32 +00001195 * statement, then this stores the column-names to be
1196 * inserted into.
danielk1977d99bc932002-05-16 00:13:12 +00001197 *
1198 * (op == TK_DELETE)
1199 * target -> A token holding the name of the table to delete from.
1200 * pWhere -> The WHERE clause of the DELETE statement if one is specified.
1201 * Otherwise NULL.
1202 *
1203 * (op == TK_UPDATE)
1204 * target -> A token holding the name of the table to update rows of.
1205 * pWhere -> The WHERE clause of the UPDATE statement if one is specified.
1206 * Otherwise NULL.
1207 * pExprList -> A list of the columns to update and the expressions to update
danielk19774adee202004-05-08 08:23:19 +00001208 * them to. See sqlite3Update() documentation of "pChanges"
drhad3cab52002-05-24 02:04:32 +00001209 * argument.
danielk1977d99bc932002-05-16 00:13:12 +00001210 *
1211 */
1212struct TriggerStep {
1213 int op; /* One of TK_DELETE, TK_UPDATE, TK_INSERT, TK_SELECT */
1214 int orconf; /* OE_Rollback etc. */
drha69d9162003-04-17 22:57:53 +00001215 Trigger *pTrig; /* The trigger that this step is a part of */
danielk1977c3f9bad2002-05-15 08:30:12 +00001216
danielk1977d99bc932002-05-16 00:13:12 +00001217 Select *pSelect; /* Valid for SELECT and sometimes
1218 INSERT steps (when pExprList == 0) */
1219 Token target; /* Valid for DELETE, UPDATE, INSERT steps */
1220 Expr *pWhere; /* Valid for DELETE, UPDATE steps */
1221 ExprList *pExprList; /* Valid for UPDATE statements and sometimes
1222 INSERT steps (when pSelect == 0) */
1223 IdList *pIdList; /* Valid for INSERT statements only */
1224
1225 TriggerStep * pNext; /* Next in the link-list */
1226};
1227
1228/*
1229 * An instance of struct TriggerStack stores information required during code
1230 * generation of a single trigger program. While the trigger program is being
1231 * coded, its associated TriggerStack instance is pointed to by the
1232 * "pTriggerStack" member of the Parse structure.
1233 *
1234 * The pTab member points to the table that triggers are being coded on. The
1235 * newIdx member contains the index of the vdbe cursor that points at the temp
1236 * table that stores the new.* references. If new.* references are not valid
1237 * for the trigger being coded (for example an ON DELETE trigger), then newIdx
1238 * is set to -1. The oldIdx member is analogous to newIdx, for old.* references.
1239 *
1240 * The ON CONFLICT policy to be used for the trigger program steps is stored
1241 * as the orconf member. If this is OE_Default, then the ON CONFLICT clause
1242 * specified for individual triggers steps is used.
1243 *
1244 * struct TriggerStack has a "pNext" member, to allow linked lists to be
1245 * constructed. When coding nested triggers (triggers fired by other triggers)
1246 * each nested trigger stores its parent trigger's TriggerStack as the "pNext"
1247 * pointer. Once the nested trigger has been coded, the pNext value is restored
1248 * to the pTriggerStack member of the Parse stucture and coding of the parent
1249 * trigger continues.
1250 *
1251 * Before a nested trigger is coded, the linked list pointed to by the
1252 * pTriggerStack is scanned to ensure that the trigger is not about to be coded
1253 * recursively. If this condition is detected, the nested trigger is not coded.
1254 */
1255struct TriggerStack {
1256 Table *pTab; /* Table that triggers are currently being coded on */
1257 int newIdx; /* Index of vdbe cursor to "new" temp table */
1258 int oldIdx; /* Index of vdbe cursor to "old" temp table */
1259 int orconf; /* Current orconf policy */
danielk19776f349032002-06-11 02:25:40 +00001260 int ignoreJump; /* where to jump to for a RAISE(IGNORE) */
drhe22a3342003-04-22 20:30:37 +00001261 Trigger *pTrigger; /* The trigger currently being coded */
1262 TriggerStack *pNext; /* Next trigger down on the trigger stack */
danielk1977d99bc932002-05-16 00:13:12 +00001263};
1264
1265/*
drhf26e09c2003-05-31 16:21:12 +00001266** The following structure contains information used by the sqliteFix...
1267** routines as they walk the parse tree to make database references
1268** explicit.
1269*/
1270typedef struct DbFixer DbFixer;
1271struct DbFixer {
1272 Parse *pParse; /* The parsing context. Error messages written here */
1273 const char *zDb; /* Make sure all objects are contained in this database */
1274 const char *zType; /* Type of the container - used for error messages */
1275 const Token *pName; /* Name of the container - used for error messages */
1276};
1277
1278/*
drh234c39d2004-07-24 03:30:47 +00001279** A pointer to this structure is used to communicate information
1280** from sqlite3Init and OP_ParseSchema into the sqlite3InitCallback.
1281*/
1282typedef struct {
drh9bb575f2004-09-06 17:24:11 +00001283 sqlite3 *db; /* The database being initialized */
drh234c39d2004-07-24 03:30:47 +00001284 char **pzErrMsg; /* Error message stored here */
1285} InitData;
1286
drhb6c29892004-11-22 19:12:19 +00001287/*
danielk1977d99bc932002-05-16 00:13:12 +00001288 * This global flag is set for performance testing of triggers. When it is set
1289 * SQLite will perform the overhead of building new and old trigger references
1290 * even when no triggers exist
1291 */
drh38f82712004-06-18 17:10:16 +00001292extern int sqlite3_always_code_trigger_setup;
danielk1977c3f9bad2002-05-15 08:30:12 +00001293
drh75897232000-05-29 14:26:00 +00001294/*
1295** Internal function prototypes
1296*/
danielk19774adee202004-05-08 08:23:19 +00001297int sqlite3StrICmp(const char *, const char *);
1298int sqlite3StrNICmp(const char *, const char *, int);
1299int sqlite3HashNoCase(const char *, int);
danielk19778a6b5412004-05-24 07:04:25 +00001300int sqlite3IsNumber(const char*, int*, u8);
danielk19774adee202004-05-08 08:23:19 +00001301int sqlite3Compare(const char *, const char *);
1302int sqlite3SortCompare(const char *, const char *);
1303void sqlite3RealToSortable(double r, char *);
danielk19772c336542005-01-13 02:14:23 +00001304#ifdef SQLITE_MEMDEBUG
danielk19774adee202004-05-08 08:23:19 +00001305 void *sqlite3Malloc_(int,int,char*,int);
1306 void sqlite3Free_(void*,char*,int);
1307 void *sqlite3Realloc_(void*,int,char*,int);
1308 char *sqlite3StrDup_(const char*,char*,int);
1309 char *sqlite3StrNDup_(const char*, int,char*,int);
1310 void sqlite3CheckMemory(void*,int);
drhdcc581c2000-05-30 13:44:19 +00001311#else
drhbdb43832004-06-18 17:45:11 +00001312 void *sqlite3Malloc(int);
1313 void *sqlite3MallocRaw(int);
1314 void sqlite3Free(void*);
1315 void *sqlite3Realloc(void*,int);
1316 char *sqlite3StrDup(const char*);
1317 char *sqlite3StrNDup(const char*, int);
danielk19774adee202004-05-08 08:23:19 +00001318# define sqlite3CheckMemory(a,b)
drhdcc581c2000-05-30 13:44:19 +00001319#endif
drh998da3a2004-06-19 15:22:56 +00001320void sqlite3FreeX(void*);
danielk19774adee202004-05-08 08:23:19 +00001321char *sqlite3MPrintf(const char*, ...);
1322char *sqlite3VMPrintf(const char*, va_list);
drhe54ca3f2004-06-07 01:52:14 +00001323void sqlite3DebugPrintf(const char*, ...);
drhfe63d1c2004-09-08 20:13:04 +00001324void *sqlite3TextToPtr(const char*);
danielk19774adee202004-05-08 08:23:19 +00001325void sqlite3SetString(char **, const char *, ...);
danielk19774adee202004-05-08 08:23:19 +00001326void sqlite3ErrorMsg(Parse*, const char*, ...);
1327void sqlite3Dequote(char*);
1328int sqlite3KeywordCode(const char*, int);
1329int sqlite3RunParser(Parse*, const char*, char **);
drh80242052004-06-09 00:48:12 +00001330void sqlite3FinishCoding(Parse*);
drhe4e72072004-11-23 01:47:30 +00001331Expr *sqlite3Expr(int, Expr*, Expr*, const Token*);
drh4e0cff62004-11-05 05:10:28 +00001332Expr *sqlite3RegisterExpr(Parse*,Token*);
drh91bb0ee2004-09-01 03:06:34 +00001333Expr *sqlite3ExprAnd(Expr*, Expr*);
danielk19774adee202004-05-08 08:23:19 +00001334void sqlite3ExprSpan(Expr*,Token*,Token*);
1335Expr *sqlite3ExprFunction(ExprList*, Token*);
drhfa6bc002004-09-07 16:19:52 +00001336void sqlite3ExprAssignVarNumber(Parse*, Expr*);
danielk19774adee202004-05-08 08:23:19 +00001337void sqlite3ExprDelete(Expr*);
1338ExprList *sqlite3ExprListAppend(ExprList*,Expr*,Token*);
1339void sqlite3ExprListDelete(ExprList*);
drh9bb575f2004-09-06 17:24:11 +00001340int sqlite3Init(sqlite3*, char**);
drh234c39d2004-07-24 03:30:47 +00001341int sqlite3InitCallback(void*, int, char**, char**);
danielk197791cf71b2004-06-26 06:37:06 +00001342void sqlite3Pragma(Parse*,Token*,Token*,Token*,int);
drh9bb575f2004-09-06 17:24:11 +00001343void sqlite3ResetInternalSchema(sqlite3*, int);
danielk19774adee202004-05-08 08:23:19 +00001344void sqlite3BeginParse(Parse*,int);
drh9bb575f2004-09-06 17:24:11 +00001345void sqlite3RollbackInternalChanges(sqlite3*);
1346void sqlite3CommitInternalChanges(sqlite3*);
danielk19774adee202004-05-08 08:23:19 +00001347Table *sqlite3ResultSetOfSelect(Parse*,char*,Select*);
1348void sqlite3OpenMasterTable(Vdbe *v, int);
danielk1977cbb18d22004-05-28 11:37:27 +00001349void sqlite3StartTable(Parse*,Token*,Token*,Token*,int,int);
danielk19774adee202004-05-08 08:23:19 +00001350void sqlite3AddColumn(Parse*,Token*);
1351void sqlite3AddNotNull(Parse*, int);
drh205f48e2004-11-05 00:43:11 +00001352void sqlite3AddPrimaryKey(Parse*, ExprList*, int, int);
danielk19774adee202004-05-08 08:23:19 +00001353void sqlite3AddColumnType(Parse*,Token*,Token*);
danielk19777977a172004-11-09 12:44:37 +00001354void sqlite3AddDefaultValue(Parse*,Expr*);
drhd3d39e92004-05-20 22:16:29 +00001355void sqlite3AddCollateType(Parse*, const char*, int);
danielk19774adee202004-05-08 08:23:19 +00001356void sqlite3EndTable(Parse*,Token*,Select*);
drhb7f91642004-10-31 02:22:47 +00001357
1358#ifndef SQLITE_OMIT_VIEW
1359 void sqlite3CreateView(Parse*,Token*,Token*,Token*,Select*,int);
1360 int sqlite3ViewGetColumnNames(Parse*,Table*);
1361#else
1362# define sqlite3ViewGetColumnNames(A,B) 0
1363#endif
1364
danielk1977a8858102004-05-28 12:11:21 +00001365void sqlite3DropTable(Parse*, SrcList*, int);
drh9bb575f2004-09-06 17:24:11 +00001366void sqlite3DeleteTable(sqlite3*, Table*);
danielk19774adee202004-05-08 08:23:19 +00001367void sqlite3Insert(Parse*, SrcList*, ExprList*, Select*, IdList*, int);
1368IdList *sqlite3IdListAppend(IdList*, Token*);
1369int sqlite3IdListIndex(IdList*,const char*);
1370SrcList *sqlite3SrcListAppend(SrcList*, Token*, Token*);
1371void sqlite3SrcListAddAlias(SrcList*, Token*);
1372void sqlite3SrcListAssignCursors(Parse*, SrcList*);
1373void sqlite3IdListDelete(IdList*);
1374void sqlite3SrcListDelete(SrcList*);
danielk19770202b292004-06-09 09:55:16 +00001375void sqlite3CreateIndex(Parse*,Token*,Token*,SrcList*,ExprList*,int,Token*,
danielk1977ef2cb632004-05-29 02:37:19 +00001376 Token*);
danielk19774adee202004-05-08 08:23:19 +00001377void sqlite3DropIndex(Parse*, SrcList*);
1378void sqlite3AddKeyType(Vdbe*, ExprList*);
1379void sqlite3AddIdxKeyType(Vdbe*, Index*);
danielk1977b3bce662005-01-29 08:32:43 +00001380int sqlite3Select(Parse*, Select*, int, int, Select*, int, int*, char *aff);
danielk19774adee202004-05-08 08:23:19 +00001381Select *sqlite3SelectNew(ExprList*,SrcList*,Expr*,ExprList*,Expr*,ExprList*,
danielk1977a2dc3b12005-02-05 12:48:48 +00001382 int,Expr*,Expr*);
danielk19774adee202004-05-08 08:23:19 +00001383void sqlite3SelectDelete(Select*);
1384void sqlite3SelectUnbind(Select*);
1385Table *sqlite3SrcListLookup(Parse*, SrcList*);
1386int sqlite3IsReadOnly(Parse*, Table*, int);
drhad6d9462004-09-19 02:15:24 +00001387void sqlite3OpenTableForReading(Vdbe*, int iCur, Table*);
drhb6c29892004-11-22 19:12:19 +00001388void sqlite3OpenTable(Vdbe*, int iCur, Table*, int);
danielk19774adee202004-05-08 08:23:19 +00001389void sqlite3DeleteFrom(Parse*, SrcList*, Expr*);
1390void sqlite3Update(Parse*, SrcList*, ExprList*, Expr*, int);
drhe6f85e72004-12-25 01:03:13 +00001391WhereInfo *sqlite3WhereBegin(Parse*, SrcList*, Expr*, ExprList**, Fetch*);
danielk19774adee202004-05-08 08:23:19 +00001392void sqlite3WhereEnd(WhereInfo*);
1393void sqlite3ExprCode(Parse*, Expr*);
drh25303782004-12-07 15:41:48 +00001394void sqlite3ExprCodeAndCache(Parse*, Expr*);
drhf9b596e2004-05-26 16:54:42 +00001395int sqlite3ExprCodeExprList(Parse*, ExprList*);
danielk19774adee202004-05-08 08:23:19 +00001396void sqlite3ExprIfTrue(Parse*, Expr*, int, int);
1397void sqlite3ExprIfFalse(Parse*, Expr*, int, int);
drh205f48e2004-11-05 00:43:11 +00001398void sqlite3NextedParse(Parse*, const char*, ...);
drh9bb575f2004-09-06 17:24:11 +00001399Table *sqlite3FindTable(sqlite3*,const char*, const char*);
danielk19774adee202004-05-08 08:23:19 +00001400Table *sqlite3LocateTable(Parse*,const char*, const char*);
drh9bb575f2004-09-06 17:24:11 +00001401Index *sqlite3FindIndex(sqlite3*,const char*, const char*);
1402void sqlite3UnlinkAndDeleteTable(sqlite3*,int,const char*);
1403void sqlite3UnlinkAndDeleteIndex(sqlite3*,int,const char*);
danielk19774adee202004-05-08 08:23:19 +00001404void sqlite3Vacuum(Parse*, Token*);
drh9bb575f2004-09-06 17:24:11 +00001405int sqlite3RunVacuum(char**, sqlite3*);
drha99db3b2004-06-19 14:49:12 +00001406char *sqlite3NameFromToken(Token*);
danielk19774adee202004-05-08 08:23:19 +00001407int sqlite3ExprCheck(Parse*, Expr*, int, int*);
danielk19774adee202004-05-08 08:23:19 +00001408int sqlite3ExprCompare(Expr*, Expr*);
drhcce7d172000-05-31 15:34:51 +00001409int sqliteFuncId(Token*);
danielk1977b3bce662005-01-29 08:32:43 +00001410int sqlite3ExprResolveNames(NameContext *, Expr *);
danielk19774adee202004-05-08 08:23:19 +00001411int sqlite3ExprAnalyzeAggregates(Parse*, Expr*);
1412Vdbe *sqlite3GetVdbe(Parse*);
1413void sqlite3Randomness(int, void*);
drh9bb575f2004-09-06 17:24:11 +00001414void sqlite3RollbackAll(sqlite3*);
danielk19774adee202004-05-08 08:23:19 +00001415void sqlite3CodeVerifySchema(Parse*, int);
drh684917c2004-10-05 02:41:42 +00001416void sqlite3BeginTransaction(Parse*, int);
danielk19774adee202004-05-08 08:23:19 +00001417void sqlite3CommitTransaction(Parse*);
1418void sqlite3RollbackTransaction(Parse*);
1419int sqlite3ExprIsConstant(Expr*);
1420int sqlite3ExprIsInteger(Expr*, int*);
1421int sqlite3IsRowid(const char*);
drh9bb575f2004-09-06 17:24:11 +00001422void sqlite3GenerateRowDelete(sqlite3*, Vdbe*, Table*, int, int);
1423void sqlite3GenerateRowIndexDelete(sqlite3*, Vdbe*, Table*, int, char*);
drh51846b52004-05-28 16:00:21 +00001424void sqlite3GenerateIndexKey(Vdbe*, Index*, int);
danielk19774adee202004-05-08 08:23:19 +00001425void sqlite3GenerateConstraintChecks(Parse*,Table*,int,char*,int,int,int,int);
1426void sqlite3CompleteInsertion(Parse*, Table*, int, char*, int, int, int);
drh290c1942004-08-21 17:54:45 +00001427void sqlite3OpenTableAndIndices(Parse*, Table*, int, int);
danielk19774adee202004-05-08 08:23:19 +00001428void sqlite3BeginWriteOperation(Parse*, int, int);
danielk19774adee202004-05-08 08:23:19 +00001429Expr *sqlite3ExprDup(Expr*);
1430void sqlite3TokenCopy(Token*, Token*);
1431ExprList *sqlite3ExprListDup(ExprList*);
1432SrcList *sqlite3SrcListDup(SrcList*);
1433IdList *sqlite3IdListDup(IdList*);
1434Select *sqlite3SelectDup(Select*);
drh9bb575f2004-09-06 17:24:11 +00001435FuncDef *sqlite3FindFunction(sqlite3*,const char*,int,int,u8,int);
1436void sqlite3RegisterBuiltinFunctions(sqlite3*);
1437void sqlite3RegisterDateTimeFunctions(sqlite3*);
1438int sqlite3SafetyOn(sqlite3*);
1439int sqlite3SafetyOff(sqlite3*);
1440int sqlite3SafetyCheck(sqlite3*);
1441void sqlite3ChangeCookie(sqlite3*, Vdbe*, int);
drhb7f91642004-10-31 02:22:47 +00001442
1443#ifndef SQLITE_OMIT_TRIGGER
1444 void sqlite3BeginTrigger(Parse*, Token*,Token*,int,int,IdList*,SrcList*,
1445 int,Expr*,int);
1446 void sqlite3FinishTrigger(Parse*, TriggerStep*, Token*);
1447 void sqlite3DropTrigger(Parse*, SrcList*);
1448 void sqlite3DropTriggerPtr(Parse*, Trigger*, int);
drhdca76842004-12-07 14:06:13 +00001449 int sqlite3TriggersExist(Parse*, Table*, int, ExprList*);
drhb7f91642004-10-31 02:22:47 +00001450 int sqlite3CodeRowTrigger(Parse*, int, ExprList*, int, Table *, int, int,
1451 int, int);
1452 void sqliteViewTriggers(Parse*, Table*, Expr*, int, ExprList*);
1453 void sqlite3DeleteTriggerStep(TriggerStep*);
1454 TriggerStep *sqlite3TriggerSelectStep(Select*);
1455 TriggerStep *sqlite3TriggerInsertStep(Token*, IdList*, ExprList*,Select*,int);
1456 TriggerStep *sqlite3TriggerUpdateStep(Token*, ExprList*, Expr*, int);
1457 TriggerStep *sqlite3TriggerDeleteStep(Token*, Expr*);
1458 void sqlite3DeleteTrigger(Trigger*);
1459 void sqlite3UnlinkAndDeleteTrigger(sqlite3*,int,const char*);
1460#else
1461# define sqlite3TriggersExist(A,B,C,D,E,F) 0
1462# define sqlite3DeleteTrigger(A)
1463# define sqlite3DropTriggerPtr(A,B,C)
1464# define sqlite3UnlinkAndDeleteTrigger(A,B,C)
1465# define sqlite3CodeRowTrigger(A,B,C,D,E,F,G,H,I) 0
1466#endif
1467
danielk19774adee202004-05-08 08:23:19 +00001468int sqlite3JoinType(Parse*, Token*, Token*, Token*);
danielk19770202b292004-06-09 09:55:16 +00001469void sqlite3CreateForeignKey(Parse*, ExprList*, Token*, ExprList*, int);
danielk19774adee202004-05-08 08:23:19 +00001470void sqlite3DeferForeignKey(Parse*, int);
drhed6c8672003-01-12 18:02:16 +00001471#ifndef SQLITE_OMIT_AUTHORIZATION
danielk19774adee202004-05-08 08:23:19 +00001472 void sqlite3AuthRead(Parse*,Expr*,SrcList*);
1473 int sqlite3AuthCheck(Parse*,int, const char*, const char*, const char*);
1474 void sqlite3AuthContextPush(Parse*, AuthContext*, const char*);
1475 void sqlite3AuthContextPop(AuthContext*);
drhed6c8672003-01-12 18:02:16 +00001476#else
danielk19774adee202004-05-08 08:23:19 +00001477# define sqlite3AuthRead(a,b,c)
1478# define sqlite3AuthCheck(a,b,c,d,e) SQLITE_OK
1479# define sqlite3AuthContextPush(a,b,c)
1480# define sqlite3AuthContextPop(a) ((void)(a))
drhed6c8672003-01-12 18:02:16 +00001481#endif
drh25d65432004-07-22 15:02:25 +00001482void sqlite3Attach(Parse*, Token*, Token*, int, Token*);
danielk19774adee202004-05-08 08:23:19 +00001483void sqlite3Detach(Parse*, Token*);
drh9bb575f2004-09-06 17:24:11 +00001484int sqlite3BtreeFactory(const sqlite3 *db, const char *zFilename,
drh90f5ecb2004-07-22 01:19:35 +00001485 int omitJournal, int nCache, Btree **ppBtree);
danielk19774adee202004-05-08 08:23:19 +00001486int sqlite3FixInit(DbFixer*, Parse*, int, const char*, const Token*);
1487int sqlite3FixSrcList(DbFixer*, SrcList*);
1488int sqlite3FixSelect(DbFixer*, Select*);
1489int sqlite3FixExpr(DbFixer*, Expr*);
1490int sqlite3FixExprList(DbFixer*, ExprList*);
1491int sqlite3FixTriggerStep(DbFixer*, TriggerStep*);
1492double sqlite3AtoF(const char *z, const char **);
danielk19776f8a5032004-05-10 10:34:51 +00001493char *sqlite3_snprintf(int,char*,const char*,...);
drhfec19aa2004-05-19 20:41:03 +00001494int sqlite3GetInt32(const char *, int*);
drhfec19aa2004-05-19 20:41:03 +00001495int sqlite3FitsIn64Bits(const char *);
danielk19776622cce2004-05-20 11:00:52 +00001496int sqlite3utf16ByteLen(const void *pData, int nChar);
1497int sqlite3utf8CharLen(const char *pData, int nByte);
drh4e5ffc52004-08-31 00:52:37 +00001498int sqlite3ReadUtf8(const unsigned char *);
danielk1977192ac1d2004-05-10 07:17:30 +00001499int sqlite3PutVarint(unsigned char *, u64);
danielk197790e4d952004-05-10 10:05:53 +00001500int sqlite3GetVarint(const unsigned char *, u64 *);
drh6d2fb152004-05-14 16:50:06 +00001501int sqlite3GetVarint32(const unsigned char *, u32 *);
danielk1977192ac1d2004-05-10 07:17:30 +00001502int sqlite3VarintLen(u64 v);
danielk1977a37cdde2004-05-16 11:15:36 +00001503void sqlite3IndexAffinityStr(Vdbe *, Index *);
1504void sqlite3TableAffinityStr(Vdbe *, Table *);
danielk1977e014a832004-05-17 10:48:57 +00001505char sqlite3CompareAffinity(Expr *pExpr, char aff2);
danielk1977e014a832004-05-17 10:48:57 +00001506int sqlite3IndexAffinityOk(Expr *pExpr, char idx_affinity);
danielk1977bf3b7212004-05-18 10:06:24 +00001507char sqlite3ExprAffinity(Expr *pExpr);
drheb2e1762004-05-27 01:53:56 +00001508int sqlite3atoi64(const char*, i64*);
drh9bb575f2004-09-06 17:24:11 +00001509void sqlite3Error(sqlite3*, int, const char*,...);
danielk1977cbb18d22004-05-28 11:37:27 +00001510void *sqlite3HexToBlob(const char *z);
danielk1977ef2cb632004-05-29 02:37:19 +00001511int sqlite3TwoPartName(Parse *, Token *, Token *, Token **);
danielk1977f20b21c2004-05-31 23:56:42 +00001512const char *sqlite3ErrStr(int);
danielk1977d02eb1f2004-06-06 09:44:03 +00001513int sqlite3ReadUniChar(const char *zStr, int *pOffset, u8 *pEnc, int fold);
danielk19778a414492004-06-29 08:59:35 +00001514int sqlite3ReadSchema(Parse *pParse);
drh9bb575f2004-09-06 17:24:11 +00001515CollSeq *sqlite3FindCollSeq(sqlite3*,u8 enc, const char *,int,int);
danielk19770202b292004-06-09 09:55:16 +00001516CollSeq *sqlite3LocateCollSeq(Parse *pParse, const char *zName, int nName);
danielk19777cedc8d2004-06-10 10:50:08 +00001517CollSeq *sqlite3ExprCollSeq(Parse *pParse, Expr *pExpr);
1518int sqlite3CheckCollSeq(Parse *, CollSeq *);
1519int sqlite3CheckIndexCollSeq(Parse *, Index *);
danielk1977d8123362004-06-12 09:25:12 +00001520int sqlite3CheckObjectName(Parse *, const char *);
danielk1977b28af712004-06-21 06:50:26 +00001521void sqlite3VdbeSetChanges(sqlite3 *, int);
danielk1977f4618892004-06-28 13:09:11 +00001522void sqlite3utf16Substr(sqlite3_context *,int,sqlite3_value **);
danielk19774e6af132004-06-10 14:01:08 +00001523
1524const void *sqlite3ValueText(sqlite3_value*, u8);
1525int sqlite3ValueBytes(sqlite3_value*, u8);
danielk1977bfd6cce2004-06-18 04:24:54 +00001526void sqlite3ValueSetStr(sqlite3_value*, int, const void *,u8, void(*)(void*));
danielk19774e6af132004-06-10 14:01:08 +00001527void sqlite3ValueFree(sqlite3_value*);
1528sqlite3_value *sqlite3ValueNew();
drh9bb575f2004-09-06 17:24:11 +00001529sqlite3_value *sqlite3GetTransientValue(sqlite3*db);
drh4e5ffc52004-08-31 00:52:37 +00001530extern const unsigned char sqlite3UpperToLower[];
danielk1977a0bf2652004-11-04 14:30:04 +00001531void sqlite3RootPageMoved(Db*, int, int);
drh4343fea2004-11-05 23:46:15 +00001532void sqlite3Reindex(Parse*, Token*, Token*);
danielk19779fd2a9a2004-11-12 13:42:30 +00001533void sqlite3AlterRenameTable(Parse*, SrcList*, Token*);
1534int sqlite3GetToken(const unsigned char *, int *);
drh2958a4e2004-11-12 03:56:15 +00001535void sqlite3NestedParse(Parse*, const char*, ...);
drhd89bd002005-01-22 03:03:54 +00001536void sqlite3ExpirePreparedStatements(sqlite3*);
danielk1977b3bce662005-01-29 08:32:43 +00001537void sqlite3CodeSubselect(Parse *, Expr *);
1538int sqlite3SelectResolve(Parse *, Select *, NameContext *);
danielk1977e3026632004-06-22 11:29:02 +00001539
1540#endif