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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**
danielk197794eb6a12005-12-15 15:22:08 +000014** @(#) $Id: sqliteInt.h,v 1.437 2005/12/15 15:22:09 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/*
drh4b529d92005-09-13 00:00:00 +000020** Many people are failing to set -DNDEBUG=1 when compiling SQLite.
drhb27795c2005-09-13 00:02:16 +000021** Setting NDEBUG makes the code smaller and run faster. So the following
drh4b529d92005-09-13 00:00:00 +000022** lines are added to automatically set NDEBUG unless the -DSQLITE_DEBUG=1
23** option is set. Thus NDEBUG becomes an opt-in rather than an opt-out
24** feature.
25*/
drh289ab072005-09-13 16:12:47 +000026#if !defined(NDEBUG) && !defined(SQLITE_DEBUG)
drh4b529d92005-09-13 00:00:00 +000027# define NDEBUG 1
28#endif
29
30/*
drheb206252004-10-01 02:00:31 +000031** These #defines should enable >2GB file support on Posix if the
32** underlying operating system supports it. If the OS lacks
33** large file support, or if the OS is windows, these should be no-ops.
34**
35** Large file support can be disabled using the -DSQLITE_DISABLE_LFS switch
36** on the compiler command line. This is necessary if you are compiling
37** on a recent machine (ex: RedHat 7.2) but you want your code to work
38** on an older machine (ex: RedHat 6.0). If you compile on RedHat 7.2
39** without this option, LFS is enable. But LFS does not exist in the kernel
40** in RedHat 6.0, so the code won't work. Hence, for maximum binary
41** portability you should omit LFS.
42**
43** Similar is true for MacOS. LFS is only supported on MacOS 9 and later.
44*/
45#ifndef SQLITE_DISABLE_LFS
46# define _LARGE_FILE 1
47# ifndef _FILE_OFFSET_BITS
48# define _FILE_OFFSET_BITS 64
49# endif
50# define _LARGEFILE_SOURCE 1
51#endif
52
drh1d482dd2004-05-31 18:23:07 +000053#include "sqlite3.h"
drhbeae3192001-09-22 18:12:08 +000054#include "hash.h"
drh75897232000-05-29 14:26:00 +000055#include "parse.h"
drh75897232000-05-29 14:26:00 +000056#include <stdio.h>
57#include <stdlib.h>
58#include <string.h>
59#include <assert.h>
drh52370e22005-01-21 21:31:40 +000060#include <stddef.h>
drh75897232000-05-29 14:26:00 +000061
drh967e8b72000-06-21 13:59:10 +000062/*
drhb37df7b2005-10-13 02:09:49 +000063** If compiling for a processor that lacks floating point support,
64** substitute integer for floating-point
65*/
66#ifdef SQLITE_OMIT_FLOATING_POINT
67# define double sqlite_int64
68# define LONGDOUBLE_TYPE sqlite_int64
69# define SQLITE_BIG_DBL (0x7fffffffffffffff)
70# define SQLITE_OMIT_DATETIME_FUNCS 1
71# define SQLITE_OMIT_TRACE 1
72#endif
73
74/*
drha1b351a2001-09-14 16:42:12 +000075** The maximum number of in-memory pages to use for the main database
danielk197724c8ab82005-02-09 01:40:23 +000076** table and for temporary tables. Internally, the MAX_PAGES and
77** TEMP_PAGES macros are used. To override the default values at
78** compilation time, the SQLITE_DEFAULT_CACHE_SIZE and
79** SQLITE_DEFAULT_TEMP_CACHE_SIZE macros should be set.
drha1b351a2001-09-14 16:42:12 +000080*/
drh1ba1e6e2005-01-21 21:22:52 +000081#ifdef SQLITE_DEFAULT_CACHE_SIZE
82# define MAX_PAGES SQLITE_DEFAULT_CACHE_SIZE
83#else
84# define MAX_PAGES 2000
85#endif
danielk197724c8ab82005-02-09 01:40:23 +000086#ifdef SQLITE_DEFAULT_TEMP_CACHE_SIZE
87# define TEMP_PAGES SQLITE_DEFAULT_TEMP_CACHE_SIZE
88#else
89# define TEMP_PAGES 500
90#endif
drha1b351a2001-09-14 16:42:12 +000091
92/*
danielk197753c0f742005-03-29 03:10:59 +000093** OMIT_TEMPDB is set to 1 if SQLITE_OMIT_TEMPDB is defined, or 0
94** afterward. Having this macro allows us to cause the C compiler
95** to omit code used by TEMP tables without messy #ifndef statements.
96*/
97#ifdef SQLITE_OMIT_TEMPDB
98#define OMIT_TEMPDB 1
99#else
100#define OMIT_TEMPDB 0
101#endif
102
103/*
drh0bd1f4e2002-06-06 18:54:39 +0000104** If the following macro is set to 1, then NULL values are considered
105** distinct for the SELECT DISTINCT statement and for UNION or EXCEPT
106** compound queries. No other SQL database engine (among those tested)
107** works this way except for OCELOT. But the SQL92 spec implies that
108** this is how things should work.
109**
110** If the following macro is set to 0, then NULLs are indistinct for
111** SELECT DISTINCT and for UNION.
112*/
113#define NULL_ALWAYS_DISTINCT 0
114
115/*
116** If the following macro is set to 1, then NULL values are considered
117** distinct when determining whether or not two entries are the same
118** in a UNIQUE index. This is the way PostgreSQL, Oracle, DB2, MySQL,
119** OCELOT, and Firebird all work. The SQL92 spec explicitly says this
120** is the way things are suppose to work.
121**
122** If the following macro is set to 0, the NULLs are indistinct for
123** a UNIQUE index. In this mode, you can only have a single NULL entry
124** for a column declared UNIQUE. This is the way Informix and SQL Server
125** work.
126*/
127#define NULL_DISTINCT_FOR_UNIQUE 1
128
129/*
drh665de472003-03-31 13:36:09 +0000130** The maximum number of attached databases. This must be at least 2
131** in order to support the main database file (0) and the file used to
drh80242052004-06-09 00:48:12 +0000132** hold temporary tables (1). And it must be less than 32 because
133** we use a bitmask of databases with a u32 in places (for example
134** the Parse.cookieMask field).
drh665de472003-03-31 13:36:09 +0000135*/
136#define MAX_ATTACHED 10
137
138/*
drhfa6bc002004-09-07 16:19:52 +0000139** The maximum value of a ?nnn wildcard that the parser will accept.
140*/
141#define SQLITE_MAX_VARIABLE_NUMBER 999
142
143/*
drh49766d62005-01-08 18:42:28 +0000144** Provide a default value for TEMP_STORE in case it is not specified
145** on the command-line
146*/
147#ifndef TEMP_STORE
148# define TEMP_STORE 1
149#endif
150
151/*
drhf1974842004-11-05 03:56:00 +0000152** GCC does not define the offsetof() macro so we'll have to do it
153** ourselves.
154*/
155#ifndef offsetof
156#define offsetof(STRUCTURE,FIELD) ((int)((char*)&((STRUCTURE*)0)->FIELD))
157#endif
158
159/*
drh5a2c2c22001-11-21 02:21:11 +0000160** Integers of known sizes. These typedefs might change for architectures
161** where the sizes very. Preprocessor macros are available so that the
162** types can be conveniently redefined at compile-type. Like this:
163**
164** cc '-DUINTPTR_TYPE=long long int' ...
drh41a2b482001-01-20 19:52:49 +0000165*/
drh3aac2dd2004-04-26 14:10:20 +0000166#ifndef UINT64_TYPE
drhefad9992004-06-22 12:13:55 +0000167# if defined(_MSC_VER) || defined(__BORLANDC__)
168# define UINT64_TYPE unsigned __int64
169# else
170# define UINT64_TYPE unsigned long long int
171# endif
drh3aac2dd2004-04-26 14:10:20 +0000172#endif
drh5a2c2c22001-11-21 02:21:11 +0000173#ifndef UINT32_TYPE
174# define UINT32_TYPE unsigned int
175#endif
176#ifndef UINT16_TYPE
177# define UINT16_TYPE unsigned short int
178#endif
drh939a16d2004-07-15 13:37:22 +0000179#ifndef INT16_TYPE
180# define INT16_TYPE short int
181#endif
drh5a2c2c22001-11-21 02:21:11 +0000182#ifndef UINT8_TYPE
183# define UINT8_TYPE unsigned char
184#endif
drh905793e2004-02-21 13:31:09 +0000185#ifndef INT8_TYPE
186# define INT8_TYPE signed char
187#endif
drhefad9992004-06-22 12:13:55 +0000188#ifndef LONGDOUBLE_TYPE
189# define LONGDOUBLE_TYPE long double
190#endif
drhefad9992004-06-22 12:13:55 +0000191typedef sqlite_int64 i64; /* 8-byte signed integer */
drh3aac2dd2004-04-26 14:10:20 +0000192typedef UINT64_TYPE u64; /* 8-byte unsigned integer */
drh5a2c2c22001-11-21 02:21:11 +0000193typedef UINT32_TYPE u32; /* 4-byte unsigned integer */
194typedef UINT16_TYPE u16; /* 2-byte unsigned integer */
drh939a16d2004-07-15 13:37:22 +0000195typedef INT16_TYPE i16; /* 2-byte signed integer */
drh5a2c2c22001-11-21 02:21:11 +0000196typedef UINT8_TYPE u8; /* 1-byte unsigned integer */
drh905793e2004-02-21 13:31:09 +0000197typedef UINT8_TYPE i8; /* 1-byte signed integer */
drh5a2c2c22001-11-21 02:21:11 +0000198
199/*
drhbbd42a62004-05-22 17:41:58 +0000200** Macros to determine whether the machine is big or little endian,
201** evaluated at runtime.
202*/
203extern const int sqlite3one;
drh9c054832004-05-31 18:51:57 +0000204#define SQLITE_BIGENDIAN (*(char *)(&sqlite3one)==0)
205#define SQLITE_LITTLEENDIAN (*(char *)(&sqlite3one)==1)
drhbbd42a62004-05-22 17:41:58 +0000206
207/*
drh90f5ecb2004-07-22 01:19:35 +0000208** An instance of the following structure is used to store the busy-handler
209** callback for a given sqlite handle.
210**
211** The sqlite.busyHandler member of the sqlite struct contains the busy
212** callback for the database handle. Each pager opened via the sqlite
213** handle is passed a pointer to sqlite.busyHandler. The busy-handler
214** callback is currently invoked only from within pager.c.
215*/
216typedef struct BusyHandler BusyHandler;
217struct BusyHandler {
218 int (*xFunc)(void *,int); /* The busy callback */
219 void *pArg; /* First arg to busy callback */
drha4afb652005-07-09 02:16:02 +0000220 int nBusy; /* Incremented with each busy call */
drh90f5ecb2004-07-22 01:19:35 +0000221};
222
223/*
224** Defer sourcing vdbe.h and btree.h until after the "u8" and
225** "BusyHandler typedefs.
drh905793e2004-02-21 13:31:09 +0000226*/
227#include "vdbe.h"
drh3aac2dd2004-04-26 14:10:20 +0000228#include "btree.h"
drh905793e2004-02-21 13:31:09 +0000229
230/*
drh5a2c2c22001-11-21 02:21:11 +0000231** This macro casts a pointer to an integer. Useful for doing
232** pointer arithmetic.
233*/
234#define Addr(X) ((uptr)X)
drh41a2b482001-01-20 19:52:49 +0000235
danielk19772c336542005-01-13 02:14:23 +0000236#ifdef SQLITE_MEMDEBUG
drh75897232000-05-29 14:26:00 +0000237/*
drh6e142f52000-06-08 13:36:40 +0000238** The following global variables are used for testing and debugging
drhfaa57ac2004-06-09 14:01:51 +0000239** only. They only work if SQLITE_DEBUG is defined.
drh6e142f52000-06-08 13:36:40 +0000240*/
drh46934232004-11-20 19:18:00 +0000241extern int sqlite3_nMalloc; /* Number of sqliteMalloc() calls */
242extern int sqlite3_nFree; /* Number of sqliteFree() calls */
243extern int sqlite3_iMallocFail; /* Fail sqliteMalloc() after this many calls */
244extern int sqlite3_iMallocReset; /* Set iMallocFail to this when it reaches 0 */
danielk19772e588c72005-12-09 14:25:08 +0000245#define ENTER_MALLOC (\
246 sqlite3Tsd()->zFile = __FILE__, sqlite3Tsd()->iLine = __LINE__ \
247)
danielk19772e588c72005-12-09 14:25:08 +0000248#define sqliteMalloc(x) (ENTER_MALLOC, sqlite3Malloc(x))
249#define sqliteMallocRaw(x) (ENTER_MALLOC, sqlite3MallocRaw(x))
250#define sqliteRealloc(x,y) (ENTER_MALLOC, sqlite3Realloc(x,y))
251#define sqliteStrDup(x) (ENTER_MALLOC, sqlite3StrDup(x))
252#define sqliteStrNDup(x,y) (ENTER_MALLOC, sqlite3StrNDup(x,y))
253
danielk197797cb2e92005-12-09 14:39:04 +0000254#else
255
256#define sqliteMalloc(x) sqlite3Malloc(x)
257#define sqliteMallocRaw(x) sqlite3MallocRaw(x)
258#define sqliteRealloc(x,y) sqlite3Realloc(x,y)
259#define sqliteStrDup(x) sqlite3StrDup(x)
260#define sqliteStrNDup(x,y) sqlite3StrNDup(x,y)
261
262#endif
263
264#define sqliteFree(x) sqlite3FreeX(x)
265
danielk19772e588c72005-12-09 14:25:08 +0000266/*
267** An instance of this structure is allocated for each thread that uses SQLite.
268*/
269typedef struct SqliteTsd SqliteTsd;
270struct SqliteTsd {
danielk197713a68c32005-12-15 10:11:30 +0000271 int isInit; /* True if structure has been initialised */
danielk19772e588c72005-12-09 14:25:08 +0000272 int mallocFailed; /* True after a malloc() has failed */
danielk19777ddad962005-12-12 06:53:03 +0000273#ifndef SQLITE_OMIT_SOFTHEAPLIMIT
274 unsigned int nSoftHeapLimit; /* (uint)-1 for unlimited */
275 unsigned int nAlloc; /* Number of bytes currently allocated */
276#endif
277
danielk19772e588c72005-12-09 14:25:08 +0000278#ifndef NDEBUG
279 int mallocAllowed; /* assert() in sqlite3Malloc() if not set */
280#endif
281#ifdef SQLITE_MEMDEBUG
282 int isFail; /* True if all malloc() calls should fail */
283 const char *zFile; /* Filename to associate debugging info with */
284 int iLine; /* Line number to associate debugging info with */
285 void *pFirst; /* Pointer to linked list of allocations */
286#endif
287};
288
drh6e142f52000-06-08 13:36:40 +0000289/*
drh75897232000-05-29 14:26:00 +0000290** Name of the master database table. The master database table
291** is a special table that holds the names and attributes of all
292** user tables and indices.
293*/
drhe0bc4042002-06-25 01:09:11 +0000294#define MASTER_NAME "sqlite_master"
295#define TEMP_MASTER_NAME "sqlite_temp_master"
drh75897232000-05-29 14:26:00 +0000296
297/*
danielk19778e150812004-05-10 01:17:37 +0000298** The root-page of the master database table.
299*/
300#define MASTER_ROOT 1
301
302/*
drhed6c8672003-01-12 18:02:16 +0000303** The name of the schema table.
304*/
danielk197753c0f742005-03-29 03:10:59 +0000305#define SCHEMA_TABLE(x) ((!OMIT_TEMPDB)&&(x==1)?TEMP_MASTER_NAME:MASTER_NAME)
drhed6c8672003-01-12 18:02:16 +0000306
307/*
drh75897232000-05-29 14:26:00 +0000308** A convenience macro that returns the number of elements in
309** an array.
310*/
311#define ArraySize(X) (sizeof(X)/sizeof(X[0]))
312
313/*
314** Forward references to structures
315*/
drh13449892005-09-07 21:22:45 +0000316typedef struct AggInfo AggInfo;
drhfe05af82005-07-21 03:14:59 +0000317typedef struct AuthContext AuthContext;
318typedef struct CollSeq CollSeq;
drh7020f652000-06-03 18:06:52 +0000319typedef struct Column Column;
drhfe05af82005-07-21 03:14:59 +0000320typedef struct Db Db;
drh75897232000-05-29 14:26:00 +0000321typedef struct Expr Expr;
322typedef struct ExprList ExprList;
drhc2eef3b2002-08-31 18:53:06 +0000323typedef struct FKey FKey;
drhfe05af82005-07-21 03:14:59 +0000324typedef struct FuncDef FuncDef;
325typedef struct IdList IdList;
326typedef struct Index Index;
danielk19778d059842004-05-12 11:24:02 +0000327typedef struct KeyClass KeyClass;
drhd3d39e92004-05-20 22:16:29 +0000328typedef struct KeyInfo KeyInfo;
drh626a8792005-01-17 22:08:19 +0000329typedef struct NameContext NameContext;
drhfe05af82005-07-21 03:14:59 +0000330typedef struct Parse Parse;
331typedef struct Select Select;
332typedef struct SrcList SrcList;
333typedef struct Table Table;
334typedef struct Token Token;
335typedef struct TriggerStack TriggerStack;
336typedef struct TriggerStep TriggerStep;
337typedef struct Trigger Trigger;
drhfe05af82005-07-21 03:14:59 +0000338typedef struct WhereInfo WhereInfo;
339typedef struct WhereLevel WhereLevel;
drhd3d39e92004-05-20 22:16:29 +0000340
drh001bbcb2003-03-19 03:14:00 +0000341/*
342** Each database file to be accessed by the system is an instance
343** of the following structure. There are normally two of these structures
344** in the sqlite.aDb[] array. aDb[0] is the main database file and
drha69d9162003-04-17 22:57:53 +0000345** aDb[1] is the database file used to hold temporary tables. Additional
346** databases may be attached.
drh001bbcb2003-03-19 03:14:00 +0000347*/
348struct Db {
349 char *zName; /* Name of this database */
350 Btree *pBt; /* The B*Tree structure for this database file */
351 int schema_cookie; /* Database schema version number for this file */
drhd24cc422003-03-27 12:51:24 +0000352 Hash tblHash; /* All tables indexed by name */
353 Hash idxHash; /* All (named) indices indexed by name */
354 Hash trigHash; /* All triggers indexed by name */
355 Hash aFKey; /* Foreign keys indexed by to-table */
drhd24cc422003-03-27 12:51:24 +0000356 u16 flags; /* Flags associated with this database */
drh90f5ecb2004-07-22 01:19:35 +0000357 u8 inTrans; /* 0: not writable. 1: Transaction. 2: Checkpoint */
danielk197791cf71b2004-06-26 06:37:06 +0000358 u8 safety_level; /* How aggressive at synching data to disk */
359 int cache_size; /* Number of pages to use in the cache */
drh4794f732004-11-05 17:17:50 +0000360 Table *pSeqTab; /* The sqlite_sequence table used by AUTOINCREMENT */
361 void *pAux; /* Auxiliary data. Usually NULL */
drh4d189ca2004-02-12 18:46:38 +0000362 void (*xFreeAux)(void*); /* Routine to free pAux */
drh001bbcb2003-03-19 03:14:00 +0000363};
drh75897232000-05-29 14:26:00 +0000364
365/*
drh8bf8dc92003-05-17 17:35:10 +0000366** These macros can be used to test, set, or clear bits in the
367** Db.flags field.
368*/
369#define DbHasProperty(D,I,P) (((D)->aDb[I].flags&(P))==(P))
370#define DbHasAnyProperty(D,I,P) (((D)->aDb[I].flags&(P))!=0)
371#define DbSetProperty(D,I,P) (D)->aDb[I].flags|=(P)
372#define DbClearProperty(D,I,P) (D)->aDb[I].flags&=~(P)
373
374/*
375** Allowed values for the DB.flags field.
376**
drh8bf8dc92003-05-17 17:35:10 +0000377** The DB_SchemaLoaded flag is set after the database schema has been
378** read into internal hash tables.
379**
380** DB_UnresetViews means that one or more views have column names that
381** have been filled out. If the schema changes, these column names might
382** changes and so the view will need to be reset.
383*/
drh124b27e2004-06-19 16:06:10 +0000384#define DB_SchemaLoaded 0x0001 /* The schema has been loaded */
385#define DB_UnresetViews 0x0002 /* Some views have defined column names */
drh8bf8dc92003-05-17 17:35:10 +0000386
danielk1977dc8453f2004-06-12 00:42:34 +0000387#define SQLITE_UTF16NATIVE (SQLITE_BIGENDIAN?SQLITE_UTF16BE:SQLITE_UTF16LE)
drh8bf8dc92003-05-17 17:35:10 +0000388
389/*
drhc9b84a12002-06-20 11:36:48 +0000390** Each database is an instance of the following structure.
391**
rdcb0c374f2004-02-20 22:53:38 +0000392** The sqlite.lastRowid records the last insert rowid generated by an
393** insert statement. Inserts on views do not affect its value. Each
394** trigger has its own context, so that lastRowid can be updated inside
395** triggers as usual. The previous value will be restored once the trigger
396** exits. Upon entering a before or instead of trigger, lastRowid is no
397** longer (since after version 2.8.12) reset to -1.
398**
399** The sqlite.nChange does not count changes within triggers and keeps no
danielk19776f8a5032004-05-10 10:34:51 +0000400** context. It is reset at start of sqlite3_exec.
rdcb0c374f2004-02-20 22:53:38 +0000401** The sqlite.lsChange represents the number of changes made by the last
402** insert, update, or delete statement. It remains constant throughout the
403** length of a statement and is then updated by OP_SetCounts. It keeps a
404** context stack just like lastRowid so that the count of changes
405** within a trigger is not seen outside the trigger. Changes to views do not
406** affect the value of lsChange.
407** The sqlite.csChange keeps track of the number of current changes (since
408** the last statement) and is used to update sqlite_lsChange.
danielk19776622cce2004-05-20 11:00:52 +0000409**
410** The member variables sqlite.errCode, sqlite.zErrMsg and sqlite.zErrMsg16
411** store the most recent error code and, if applicable, string. The
412** internal function sqlite3Error() is used to set these variables
413** consistently.
drh75897232000-05-29 14:26:00 +0000414*/
drh9bb575f2004-09-06 17:24:11 +0000415struct sqlite3 {
drh001bbcb2003-03-19 03:14:00 +0000416 int nDb; /* Number of backends currently in use */
417 Db *aDb; /* All backends */
drh5e00f6c2001-09-13 13:46:56 +0000418 int flags; /* Miscellanous flags. See below */
drhfcd35c72005-05-21 02:48:08 +0000419 int errCode; /* Most recent error code (SQLITE_*) */
420 u8 enc; /* Text encoding for this database. */
421 u8 autoCommit; /* The auto-commit flag. */
drh973b6e32003-02-12 14:09:42 +0000422 u8 file_format; /* What file format version is this database? */
drh90f5ecb2004-07-22 01:19:35 +0000423 u8 temp_store; /* 1: file 2: memory 0: default */
drh5e00f6c2001-09-13 13:46:56 +0000424 int nTable; /* Number of tables in the database */
drhd3d39e92004-05-20 22:16:29 +0000425 CollSeq *pDfltColl; /* The default collating sequence (BINARY) */
drhf328bc82004-05-10 23:29:49 +0000426 i64 lastRowid; /* ROWID of most recent insert (see above) */
427 i64 priorNewRowid; /* Last randomly generated ROWID */
drh247be432002-05-10 05:44:55 +0000428 int magic; /* Magic number for detect library misuse */
danielk1977b28af712004-06-21 06:50:26 +0000429 int nChange; /* Value returned by sqlite3_changes() */
430 int nTotalChange; /* Value returned by sqlite3_total_changes() */
431 struct sqlite3InitInfo { /* Information used during initialization */
432 int iDb; /* When back is being initialized */
433 int newTnum; /* Rootpage of table being initialized */
434 u8 busy; /* TRUE if currently initializing */
drh1d85d932004-02-14 23:05:52 +0000435 } init;
drh326dce72003-01-29 14:06:07 +0000436 struct Vdbe *pVdbe; /* List of active virtual machines */
danielk19771d850a72004-05-31 08:26:49 +0000437 int activeVdbeCnt; /* Number of vdbes currently executing */
drh19e2d372005-08-29 23:00:03 +0000438 void (*xTrace)(void*,const char*); /* Trace function */
439 void *pTraceArg; /* Argument to the trace function */
440 void (*xProfile)(void*,const char*,u64); /* Profiling function */
441 void *pProfileArg; /* Argument to profile function */
drhfcd35c72005-05-21 02:48:08 +0000442 void *pCommitArg; /* Argument to xCommitCallback() */
443 int (*xCommitCallback)(void*);/* Invoked at every commit. */
danielk197794eb6a12005-12-15 15:22:08 +0000444 void *pUpdateArg;
445 void (*xUpdateCallback)(void*,int, const char*,const char*,sqlite_int64);
drhfcd35c72005-05-21 02:48:08 +0000446 void(*xCollNeeded)(void*,sqlite3*,int eTextRep,const char*);
447 void(*xCollNeeded16)(void*,sqlite3*,int eTextRep,const void*);
448 void *pCollNeededArg;
drhfcd35c72005-05-21 02:48:08 +0000449 sqlite3_value *pErr; /* Most recent error message */
450 char *zErrMsg; /* Most recent error message (UTF-8 encoded) */
451 char *zErrMsg16; /* Most recent error message (UTF-16 encoded) */
drhed6c8672003-01-12 18:02:16 +0000452#ifndef SQLITE_OMIT_AUTHORIZATION
drhe22a3342003-04-22 20:30:37 +0000453 int (*xAuth)(void*,int,const char*,const char*,const char*,const char*);
454 /* Access authorization function */
drhed6c8672003-01-12 18:02:16 +0000455 void *pAuthArg; /* 1st argument to the access auth function */
456#endif
danielk1977348bb5d2003-10-18 09:37:26 +0000457#ifndef SQLITE_OMIT_PROGRESS_CALLBACK
458 int (*xProgress)(void *); /* The progress callback */
459 void *pProgressArg; /* Argument to the progress callback */
460 int nProgressOps; /* Number of opcodes for progress callback */
461#endif
danielk19776b456a22005-03-21 04:04:02 +0000462#ifndef SQLITE_OMIT_GLOBALRECOVER
463 sqlite3 *pNext; /* Linked list of open db handles. */
464#endif
drhfcd35c72005-05-21 02:48:08 +0000465 Hash aFunc; /* All functions that can be in SQL exprs */
466 Hash aCollSeq; /* All collating sequences */
467 BusyHandler busyHandler; /* Busy callback */
drh97903fe2005-05-24 20:19:57 +0000468 int busyTimeout; /* Busy handler timeout, in msec */
drhfcd35c72005-05-21 02:48:08 +0000469 Db aDbStatic[2]; /* Static space for the 2 default backends */
danielk19777e900ab2005-05-23 04:51:01 +0000470#ifdef SQLITE_SSE
471 sqlite3_stmt *pFetch; /* Used by SSE to fetch stored statements */
472#endif
drh75897232000-05-29 14:26:00 +0000473};
474
475/*
drh8bf8dc92003-05-17 17:35:10 +0000476** Possible values for the sqlite.flags and or Db.flags fields.
477**
478** On sqlite.flags, the SQLITE_InTrans value means that we have
479** executed a BEGIN. On Db.flags, SQLITE_InTrans means a statement
480** transaction is active on that particular database file.
drh75897232000-05-29 14:26:00 +0000481*/
drh5e00f6c2001-09-13 13:46:56 +0000482#define SQLITE_VdbeTrace 0x00000001 /* True to trace VDBE execution */
483#define SQLITE_Initialized 0x00000002 /* True after initialization */
484#define SQLITE_Interrupt 0x00000004 /* Cancel current operation */
485#define SQLITE_InTrans 0x00000008 /* True if in a transaction */
486#define SQLITE_InternChanges 0x00000010 /* Uncommitted Hash table changes */
drh382c0242001-10-06 16:33:02 +0000487#define SQLITE_FullColNames 0x00000020 /* Show full column names on SELECT */
drhfcabd462004-02-20 14:50:58 +0000488#define SQLITE_ShortColNames 0x00000040 /* Show short columns names */
489#define SQLITE_CountRows 0x00000080 /* Count rows changed by INSERT, */
drh1bee3d72001-10-15 00:44:35 +0000490 /* DELETE, or UPDATE and return */
491 /* the count using a callback. */
drhfcabd462004-02-20 14:50:58 +0000492#define SQLITE_NullCallback 0x00000100 /* Invoke the callback once if the */
drh6a535342001-10-19 16:44:56 +0000493 /* result set is empty */
drh35d4c2f2004-06-10 01:30:59 +0000494#define SQLITE_SqlTrace 0x00000200 /* Debug print SQL as it executes */
495#define SQLITE_VdbeListing 0x00000400 /* Debug listings of VDBE programs */
drhf4040832004-10-22 20:29:21 +0000496#define SQLITE_WriteSchema 0x00000800 /* OK to update SQLITE_MASTER */
drh7bec5052005-02-06 02:45:41 +0000497#define SQLITE_NoReadlock 0x00001000 /* Readlocks are omitted when
498 ** accessing read-only databases */
drh0cd2d4c2005-11-03 02:15:02 +0000499#define SQLITE_IgnoreChecks 0x00002000 /* Do not enforce check constraints */
drh58b95762000-06-02 01:17:37 +0000500
501/*
drh247be432002-05-10 05:44:55 +0000502** Possible values for the sqlite.magic field.
503** The numbers are obtained at random and have no special meaning, other
504** than being distinct from one another.
505*/
506#define SQLITE_MAGIC_OPEN 0xa029a697 /* Database is open */
507#define SQLITE_MAGIC_CLOSED 0x9f3c2d33 /* Database is closed */
508#define SQLITE_MAGIC_BUSY 0xf03b7906 /* Database currently in use */
509#define SQLITE_MAGIC_ERROR 0xb5357930 /* An SQLITE_MISUSE error occurred */
510
511/*
drh0bce8352002-02-28 00:41:10 +0000512** Each SQL function is defined by an instance of the following
513** structure. A pointer to this structure is stored in the sqlite.aFunc
drh8e0a2f92002-02-23 23:45:45 +0000514** hash table. When multiple functions have the same name, the hash table
515** points to a linked list of these structures.
drh28037572000-08-02 13:47:41 +0000516*/
drh0bce8352002-02-28 00:41:10 +0000517struct FuncDef {
drh55ef4d92005-08-14 01:20:37 +0000518 i16 nArg; /* Number of arguments. -1 means unlimited */
danielk1977d8123362004-06-12 09:25:12 +0000519 u8 iPrefEnc; /* Preferred text encoding (SQLITE_UTF8, 16LE, 16BE) */
drh55ef4d92005-08-14 01:20:37 +0000520 u8 needCollSeq; /* True if sqlite3GetFuncCollSeq() might be called */
521 u8 flags; /* Some combination of SQLITE_FUNC_* */
drhf9b596e2004-05-26 16:54:42 +0000522 void *pUserData; /* User data parameter */
523 FuncDef *pNext; /* Next function with same name */
524 void (*xFunc)(sqlite3_context*,int,sqlite3_value**); /* Regular function */
525 void (*xStep)(sqlite3_context*,int,sqlite3_value**); /* Aggregate step */
526 void (*xFinalize)(sqlite3_context*); /* Aggregate finializer */
drh55ef4d92005-08-14 01:20:37 +0000527 char zName[1]; /* SQL name of the function. MUST BE LAST */
drh8e0a2f92002-02-23 23:45:45 +0000528};
drh28037572000-08-02 13:47:41 +0000529
530/*
drh55ef4d92005-08-14 01:20:37 +0000531** Possible values for FuncDef.flags
532*/
drhd64fe2f2005-08-28 17:00:23 +0000533#define SQLITE_FUNC_LIKE 0x01 /* Candidate for the LIKE optimization */
534#define SQLITE_FUNC_CASE 0x02 /* Case-sensitive LIKE-type function */
drh55ef4d92005-08-14 01:20:37 +0000535
536/*
drh967e8b72000-06-21 13:59:10 +0000537** information about each column of an SQL table is held in an instance
drh7020f652000-06-03 18:06:52 +0000538** of this structure.
539*/
540struct Column {
drh967e8b72000-06-21 13:59:10 +0000541 char *zName; /* Name of this column */
danielk19777977a172004-11-09 12:44:37 +0000542 Expr *pDflt; /* Default value of this column */
drh382c0242001-10-06 16:33:02 +0000543 char *zType; /* Data type for this column */
drha9fd84b2004-05-18 23:21:35 +0000544 CollSeq *pColl; /* Collating sequence. If NULL, use the default */
drh4a324312001-12-21 14:30:42 +0000545 u8 notNull; /* True if there is a NOT NULL constraint */
drh78100cc2003-08-23 22:40:53 +0000546 u8 isPrimKey; /* True if this column is part of the PRIMARY KEY */
danielk1977a37cdde2004-05-16 11:15:36 +0000547 char affinity; /* One of the SQLITE_AFF_... values */
drh7020f652000-06-03 18:06:52 +0000548};
549
550/*
drha9fd84b2004-05-18 23:21:35 +0000551** A "Collating Sequence" is defined by an instance of the following
danielk19770202b292004-06-09 09:55:16 +0000552** structure. Conceptually, a collating sequence consists of a name and
553** a comparison routine that defines the order of that sequence.
drha9fd84b2004-05-18 23:21:35 +0000554**
danielk19770202b292004-06-09 09:55:16 +0000555** There may two seperate implementations of the collation function, one
556** that processes text in UTF-8 encoding (CollSeq.xCmp) and another that
557** processes text encoded in UTF-16 (CollSeq.xCmp16), using the machine
558** native byte order. When a collation sequence is invoked, SQLite selects
559** the version that will require the least expensive encoding
560** transalations, if any.
561**
562** The CollSeq.pUser member variable is an extra parameter that passed in
563** as the first argument to the UTF-8 comparison function, xCmp.
564** CollSeq.pUser16 is the equivalent for the UTF-16 comparison function,
565** xCmp16.
566**
567** If both CollSeq.xCmp and CollSeq.xCmp16 are NULL, it means that the
568** collating sequence is undefined. Indices built on an undefined
569** collating sequence may not be read or written.
drha9fd84b2004-05-18 23:21:35 +0000570*/
571struct CollSeq {
danielk19770202b292004-06-09 09:55:16 +0000572 char *zName; /* Name of the collating sequence, UTF-8 encoded */
danielk1977466be562004-06-10 02:16:01 +0000573 u8 enc; /* Text encoding handled by xCmp() */
drhd64fe2f2005-08-28 17:00:23 +0000574 u8 type; /* One of the SQLITE_COLL_... values below */
drha9fd84b2004-05-18 23:21:35 +0000575 void *pUser; /* First argument to xCmp() */
danielk19770202b292004-06-09 09:55:16 +0000576 int (*xCmp)(void*,int, const void*, int, const void*);
drha9fd84b2004-05-18 23:21:35 +0000577};
578
579/*
drhd64fe2f2005-08-28 17:00:23 +0000580** Allowed values of CollSeq flags:
581*/
582#define SQLITE_COLL_BINARY 1 /* The default memcmp() collating sequence */
583#define SQLITE_COLL_NOCASE 2 /* The built-in NOCASE collating sequence */
584#define SQLITE_COLL_REVERSE 3 /* The built-in REVERSE collating sequence */
585#define SQLITE_COLL_USER 0 /* Any other user-defined collating sequence */
586
587/*
drhd3d39e92004-05-20 22:16:29 +0000588** A sort order can be either ASC or DESC.
drh8e2ca022002-06-17 17:07:19 +0000589*/
drh8e2ca022002-06-17 17:07:19 +0000590#define SQLITE_SO_ASC 0 /* Sort in ascending order */
drhd3d39e92004-05-20 22:16:29 +0000591#define SQLITE_SO_DESC 1 /* Sort in ascending order */
drh8e2ca022002-06-17 17:07:19 +0000592
593/*
danielk1977a37cdde2004-05-16 11:15:36 +0000594** Column affinity types.
drh8a512562005-11-14 22:29:05 +0000595**
596** These used to have mnemonic name like 'i' for SQLITE_AFF_INTEGER and
597** 't' for SQLITE_AFF_TEXT. But we can save a little space and improve
598** the speed a little by number the values consecutively.
599**
600** But rather than start with 0 or 1, we begin with 'a'. That way,
601** when multiple affinity types are concatenated into a string and
602** used as the P3 operand, they will be more readable.
603**
604** Note also that the numeric types are grouped together so that testing
605** for a numeric type is a single comparison.
danielk1977a37cdde2004-05-16 11:15:36 +0000606*/
drh8a512562005-11-14 22:29:05 +0000607#define SQLITE_AFF_TEXT 'a'
608#define SQLITE_AFF_NONE 'b'
609#define SQLITE_AFF_NUMERIC 'c'
610#define SQLITE_AFF_INTEGER 'd'
611#define SQLITE_AFF_REAL 'e'
danielk1977a37cdde2004-05-16 11:15:36 +0000612
drh8a512562005-11-14 22:29:05 +0000613#define sqlite3IsNumericAffinity(X) ((X)>=SQLITE_AFF_NUMERIC)
danielk1977a37cdde2004-05-16 11:15:36 +0000614
615/*
drh22f70c32002-02-18 01:17:00 +0000616** Each SQL table is represented in memory by an instance of the
617** following structure.
618**
drhd24cc422003-03-27 12:51:24 +0000619** Table.zName is the name of the table. The case of the original
drh22f70c32002-02-18 01:17:00 +0000620** CREATE TABLE statement is stored, but case is not significant for
621** comparisons.
622**
drhd24cc422003-03-27 12:51:24 +0000623** Table.nCol is the number of columns in this table. Table.aCol is a
drh22f70c32002-02-18 01:17:00 +0000624** pointer to an array of Column structures, one for each column.
625**
drhd24cc422003-03-27 12:51:24 +0000626** If the table has an INTEGER PRIMARY KEY, then Table.iPKey is the index of
627** the column that is that key. Otherwise Table.iPKey is negative. Note
drh22f70c32002-02-18 01:17:00 +0000628** that the datatype of the PRIMARY KEY must be INTEGER for this field to
629** be set. An INTEGER PRIMARY KEY is used as the rowid for each row of
630** the table. If a table has no INTEGER PRIMARY KEY, then a random rowid
drhd24cc422003-03-27 12:51:24 +0000631** is generated for each row of the table. Table.hasPrimKey is true if
drh22f70c32002-02-18 01:17:00 +0000632** the table has any PRIMARY KEY, INTEGER or otherwise.
633**
drhd24cc422003-03-27 12:51:24 +0000634** Table.tnum is the page number for the root BTree page of the table in the
635** database file. If Table.iDb is the index of the database table backend
636** in sqlite.aDb[]. 0 is for the main database and 1 is for the file that
637** holds temporary tables and indices. If Table.isTransient
drh22f70c32002-02-18 01:17:00 +0000638** is true, then the table is stored in a file that is automatically deleted
drhd24cc422003-03-27 12:51:24 +0000639** when the VDBE cursor to the table is closed. In this case Table.tnum
drh22f70c32002-02-18 01:17:00 +0000640** refers VDBE cursor number that holds the table open, not to the root
641** page number. Transient tables are used to hold the results of a
642** sub-query that appears instead of a real table name in the FROM clause
643** of a SELECT statement.
drh75897232000-05-29 14:26:00 +0000644*/
645struct Table {
drh967e8b72000-06-21 13:59:10 +0000646 char *zName; /* Name of the table */
drh967e8b72000-06-21 13:59:10 +0000647 int nCol; /* Number of columns in this table */
648 Column *aCol; /* Information about each column */
drhc8392582001-12-31 02:48:51 +0000649 int iPKey; /* If not less then 0, use aCol[iPKey] as the primary key */
drh967e8b72000-06-21 13:59:10 +0000650 Index *pIndex; /* List of SQL indexes on this table. */
drh22f70c32002-02-18 01:17:00 +0000651 int tnum; /* Root BTree node for this table (see note above) */
drha76b5df2002-02-23 02:32:10 +0000652 Select *pSelect; /* NULL for tables. Points to definition if a view. */
drh717e6402001-09-27 03:22:32 +0000653 u8 readOnly; /* True if this table should not be written by the user */
drhd24cc422003-03-27 12:51:24 +0000654 u8 iDb; /* Index into sqlite.aDb[] of the backend for this table */
drh22f70c32002-02-18 01:17:00 +0000655 u8 isTransient; /* True if automatically deleted when VDBE finishes */
drh4a324312001-12-21 14:30:42 +0000656 u8 hasPrimKey; /* True if there exists a primary key */
drh9cfcf5d2002-01-29 18:41:24 +0000657 u8 keyConf; /* What to do in case of uniqueness conflict on iPKey */
drh205f48e2004-11-05 00:43:11 +0000658 u8 autoInc; /* True if the integer primary key is autoincrement */
drhed8a3bb2005-06-06 21:19:56 +0000659 int nRef; /* Number of pointers to this Table */
danielk1977c3f9bad2002-05-15 08:30:12 +0000660 Trigger *pTrigger; /* List of SQL triggers on this table */
drhc2eef3b2002-08-31 18:53:06 +0000661 FKey *pFKey; /* Linked list of all foreign keys in this table */
danielk19773d1bfea2004-05-14 11:00:53 +0000662 char *zColAff; /* String defining the affinity of each column */
drhffe07b22005-11-03 00:41:17 +0000663#ifndef SQLITE_OMIT_CHECK
664 Expr *pCheck; /* The AND of all CHECK constraints */
665#endif
danielk197719a8e7e2005-03-17 05:03:38 +0000666#ifndef SQLITE_OMIT_ALTERTABLE
667 int addColOffset; /* Offset in CREATE TABLE statement to add a new column */
668#endif
drh75897232000-05-29 14:26:00 +0000669};
670
671/*
drhc2eef3b2002-08-31 18:53:06 +0000672** Each foreign key constraint is an instance of the following structure.
673**
674** A foreign key is associated with two tables. The "from" table is
675** the table that contains the REFERENCES clause that creates the foreign
676** key. The "to" table is the table that is named in the REFERENCES clause.
677** Consider this example:
678**
679** CREATE TABLE ex1(
680** a INTEGER PRIMARY KEY,
681** b INTEGER CONSTRAINT fk1 REFERENCES ex2(x)
682** );
683**
684** For foreign key "fk1", the from-table is "ex1" and the to-table is "ex2".
685**
686** Each REFERENCES clause generates an instance of the following structure
687** which is attached to the from-table. The to-table need not exist when
688** the from-table is created. The existance of the to-table is not checked
689** until an attempt is made to insert data into the from-table.
690**
drhea1ba172003-04-20 00:00:23 +0000691** The sqlite.aFKey hash table stores pointers to this structure
drhc2eef3b2002-08-31 18:53:06 +0000692** given the name of a to-table. For each to-table, all foreign keys
693** associated with that table are on a linked list using the FKey.pNextTo
694** field.
695*/
696struct FKey {
697 Table *pFrom; /* The table that constains the REFERENCES clause */
698 FKey *pNextFrom; /* Next foreign key in pFrom */
699 char *zTo; /* Name of table that the key points to */
700 FKey *pNextTo; /* Next foreign key that points to zTo */
701 int nCol; /* Number of columns in this key */
702 struct sColMap { /* Mapping of columns in pFrom to columns in zTo */
703 int iFrom; /* Index of column in pFrom */
704 char *zCol; /* Name of column in zTo. If 0 use PRIMARY KEY */
705 } *aCol; /* One entry for each of nCol column s */
706 u8 isDeferred; /* True if constraint checking is deferred till COMMIT */
707 u8 updateConf; /* How to resolve conflicts that occur on UPDATE */
708 u8 deleteConf; /* How to resolve conflicts that occur on DELETE */
709 u8 insertConf; /* How to resolve conflicts that occur on INSERT */
710};
711
712/*
713** SQLite supports many different ways to resolve a contraint
drh22f70c32002-02-18 01:17:00 +0000714** error. ROLLBACK processing means that a constraint violation
drh0bd1f4e2002-06-06 18:54:39 +0000715** causes the operation in process to fail and for the current transaction
drh1c928532002-01-31 15:54:21 +0000716** to be rolled back. ABORT processing means the operation in process
717** fails and any prior changes from that one operation are backed out,
718** but the transaction is not rolled back. FAIL processing means that
719** the operation in progress stops and returns an error code. But prior
720** changes due to the same operation are not backed out and no rollback
721** occurs. IGNORE means that the particular row that caused the constraint
722** error is not inserted or updated. Processing continues and no error
723** is returned. REPLACE means that preexisting database rows that caused
724** a UNIQUE constraint violation are removed so that the new insert or
725** update can proceed. Processing continues and no error is reported.
drhc2eef3b2002-08-31 18:53:06 +0000726**
727** RESTRICT, SETNULL, and CASCADE actions apply only to foreign keys.
728** RESTRICT is the same as ABORT for IMMEDIATE foreign keys and the
729** same as ROLLBACK for DEFERRED keys. SETNULL means that the foreign
730** key is set to NULL. CASCADE means that a DELETE or UPDATE of the
731** referenced table row is propagated into the row that holds the
732** foreign key.
drh1c928532002-01-31 15:54:21 +0000733**
drh968af522003-02-11 14:55:40 +0000734** The following symbolic values are used to record which type
drh1c928532002-01-31 15:54:21 +0000735** of action to take.
drh9cfcf5d2002-01-29 18:41:24 +0000736*/
drh1c928532002-01-31 15:54:21 +0000737#define OE_None 0 /* There is no constraint to check */
738#define OE_Rollback 1 /* Fail the operation and rollback the transaction */
739#define OE_Abort 2 /* Back out changes but do no rollback transaction */
740#define OE_Fail 3 /* Stop the operation but leave all prior changes */
741#define OE_Ignore 4 /* Ignore the error. Do not do the INSERT or UPDATE */
742#define OE_Replace 5 /* Delete existing record, then do INSERT or UPDATE */
drhc2eef3b2002-08-31 18:53:06 +0000743
744#define OE_Restrict 6 /* OE_Abort for IMMEDIATE, OE_Rollback for DEFERRED */
745#define OE_SetNull 7 /* Set the foreign key value to NULL */
746#define OE_SetDflt 8 /* Set the foreign key value to its default */
747#define OE_Cascade 9 /* Cascade the changes */
748
749#define OE_Default 99 /* Do whatever the default action is */
drh9cfcf5d2002-01-29 18:41:24 +0000750
drhd3d39e92004-05-20 22:16:29 +0000751
752/*
753** An instance of the following structure is passed as the first
754** argument to sqlite3VdbeKeyCompare and is used to control the
755** comparison of the two index keys.
756**
757** If the KeyInfo.incrKey value is true and the comparison would
drh7e627792005-04-29 02:10:00 +0000758** otherwise be equal, then return a result as if the second key
759** were larger.
drhd3d39e92004-05-20 22:16:29 +0000760*/
761struct KeyInfo {
danielk1977b1bc9532004-05-22 03:05:33 +0000762 u8 enc; /* Text encoding - one of the TEXT_Utf* values */
drhd3d39e92004-05-20 22:16:29 +0000763 u8 incrKey; /* Increase 2nd key by epsilon before comparison */
764 int nField; /* Number of entries in aColl[] */
drhffbc3082004-05-21 01:29:06 +0000765 u8 *aSortOrder; /* If defined an aSortOrder[i] is true, sort DESC */
drhd3d39e92004-05-20 22:16:29 +0000766 CollSeq *aColl[1]; /* Collating sequence for each term of the key */
767};
768
drh9cfcf5d2002-01-29 18:41:24 +0000769/*
drh66b89c82000-11-28 20:47:17 +0000770** Each SQL index is represented in memory by an
drh75897232000-05-29 14:26:00 +0000771** instance of the following structure.
drh967e8b72000-06-21 13:59:10 +0000772**
773** The columns of the table that are to be indexed are described
774** by the aiColumn[] field of this structure. For example, suppose
775** we have the following table and index:
776**
777** CREATE TABLE Ex1(c1 int, c2 int, c3 text);
778** CREATE INDEX Ex2 ON Ex1(c3,c1);
779**
780** In the Table structure describing Ex1, nCol==3 because there are
781** three columns in the table. In the Index structure describing
782** Ex2, nColumn==2 since 2 of the 3 columns of Ex1 are indexed.
783** The value of aiColumn is {2, 0}. aiColumn[0]==2 because the
784** first column to be indexed (c3) has an index of 2 in Ex1.aCol[].
785** The second column to be indexed (c1) has an index of 0 in
786** Ex1.aCol[], hence Ex2.aiColumn[1]==0.
drhea1ba172003-04-20 00:00:23 +0000787**
788** The Index.onError field determines whether or not the indexed columns
789** must be unique and what to do if they are not. When Index.onError=OE_None,
790** it means this is not a unique index. Otherwise it is a unique index
791** and the value of Index.onError indicate the which conflict resolution
792** algorithm to employ whenever an attempt is made to insert a non-unique
793** element.
drh75897232000-05-29 14:26:00 +0000794*/
795struct Index {
drh967e8b72000-06-21 13:59:10 +0000796 char *zName; /* Name of this index */
drh967e8b72000-06-21 13:59:10 +0000797 int nColumn; /* Number of columns in the table used by this index */
798 int *aiColumn; /* Which columns are used by this index. 1st is 0 */
drh8b3d9902005-08-19 00:14:42 +0000799 unsigned *aiRowEst; /* Result of ANALYZE: Est. rows selected by each column */
drh967e8b72000-06-21 13:59:10 +0000800 Table *pTable; /* The SQL table being indexed */
drhbe0072d2001-09-13 14:46:09 +0000801 int tnum; /* Page containing root of this index in database file */
drh9cfcf5d2002-01-29 18:41:24 +0000802 u8 onError; /* OE_Abort, OE_Ignore, OE_Replace, or OE_None */
drh485b39b2002-07-13 03:11:52 +0000803 u8 autoIndex; /* True if is automatically created (ex: by UNIQUE) */
drhd24cc422003-03-27 12:51:24 +0000804 u8 iDb; /* Index in sqlite.aDb[] of where this index is stored */
danielk1977a37cdde2004-05-16 11:15:36 +0000805 char *zColAff; /* String defining the affinity of each column */
drh967e8b72000-06-21 13:59:10 +0000806 Index *pNext; /* The next index associated with the same table */
drhd3d39e92004-05-20 22:16:29 +0000807 KeyInfo keyInfo; /* Info on how to order keys. MUST BE LAST */
drh75897232000-05-29 14:26:00 +0000808};
809
810/*
811** Each token coming out of the lexer is an instance of
drh4b59ab52002-08-24 18:24:51 +0000812** this structure. Tokens are also used as part of an expression.
drh4efc4752004-01-16 15:55:37 +0000813**
814** Note if Token.z==0 then Token.dyn and Token.n are undefined and
815** may contain random values. Do not make any assuptions about Token.dyn
816** and Token.n when Token.z==0.
drh75897232000-05-29 14:26:00 +0000817*/
818struct Token {
drh4c755c02004-08-08 20:22:17 +0000819 const unsigned char *z; /* Text of the token. Not NULL-terminated! */
820 unsigned dyn : 1; /* True for malloced memory, false for static */
821 unsigned n : 31; /* Number of characters in this token */
drh75897232000-05-29 14:26:00 +0000822};
823
824/*
drh13449892005-09-07 21:22:45 +0000825** An instance of this structure contains information needed to generate
826** code for a SELECT that contains aggregate functions.
827**
828** If Expr.op==TK_AGG_COLUMN or TK_AGG_FUNCTION then Expr.pAggInfo is a
829** pointer to this structure. The Expr.iColumn field is the index in
830** AggInfo.aCol[] or AggInfo.aFunc[] of information needed to generate
831** code for that node.
832**
833** AggInfo.pGroupBy and AggInfo.aFunc.pExpr point to fields within the
834** original Select structure that describes the SELECT statement. These
835** fields do not need to be freed when deallocating the AggInfo structure.
836*/
837struct AggInfo {
838 u8 directMode; /* Direct rendering mode means take data directly
839 ** from source tables rather than from accumulators */
840 u8 useSortingIdx; /* In direct mode, reference the sorting index rather
841 ** than the source table */
842 int sortingIdx; /* Cursor number of the sorting index */
843 ExprList *pGroupBy; /* The group by clause */
844 int nSortingColumn; /* Number of columns in the sorting index */
845 struct AggInfo_col { /* For each column used in source tables */
846 int iTable; /* Cursor number of the source table */
847 int iColumn; /* Column number within the source table */
848 int iSorterColumn; /* Column number in the sorting index */
849 int iMem; /* Memory location that acts as accumulator */
drh5774b802005-09-07 22:48:16 +0000850 Expr *pExpr; /* The original expression */
drh13449892005-09-07 21:22:45 +0000851 } *aCol;
852 int nColumn; /* Number of used entries in aCol[] */
853 int nColumnAlloc; /* Number of slots allocated for aCol[] */
854 int nAccumulator; /* Number of columns that show through to the output.
855 ** Additional columns are used only as parameters to
856 ** aggregate functions */
857 struct AggInfo_func { /* For each aggregate function */
858 Expr *pExpr; /* Expression encoding the function */
859 FuncDef *pFunc; /* The aggregate function implementation */
860 int iMem; /* Memory location that acts as accumulator */
drhfd357972005-09-09 01:33:19 +0000861 int iDistinct; /* Virtual table used to enforce DISTINCT */
drh13449892005-09-07 21:22:45 +0000862 } *aFunc;
863 int nFunc; /* Number of entries in aFunc[] */
864 int nFuncAlloc; /* Number of slots allocated for aFunc[] */
865};
866
867/*
drh75897232000-05-29 14:26:00 +0000868** Each node of an expression in the parse tree is an instance
drh22f70c32002-02-18 01:17:00 +0000869** of this structure.
870**
871** Expr.op is the opcode. The integer parser token codes are reused
872** as opcodes here. For example, the parser defines TK_GE to be an integer
873** code representing the ">=" operator. This same integer code is reused
874** to represent the greater-than-or-equal-to operator in the expression
875** tree.
876**
877** Expr.pRight and Expr.pLeft are subexpressions. Expr.pList is a list
878** of argument if the expression is a function.
879**
drh4b59ab52002-08-24 18:24:51 +0000880** Expr.token is the operator token for this node. For some expressions
881** that have subexpressions, Expr.token can be the complete text that gave
882** rise to the Expr. In the latter case, the token is marked as being
883** a compound token.
drh22f70c32002-02-18 01:17:00 +0000884**
885** An expression of the form ID or ID.ID refers to a column in a table.
886** For such expressions, Expr.op is set to TK_COLUMN and Expr.iTable is
887** the integer cursor number of a VDBE cursor pointing to that table and
888** Expr.iColumn is the column number for the specific column. If the
889** expression is used as a result in an aggregate SELECT, then the
890** value is also stored in the Expr.iAgg column in the aggregate so that
891** it can be accessed after all aggregates are computed.
892**
893** If the expression is a function, the Expr.iTable is an integer code
drh7c972de2003-09-06 22:18:07 +0000894** representing which function. If the expression is an unbound variable
895** marker (a question mark character '?' in the original SQL) then the
896** Expr.iTable holds the index number for that variable.
drh22f70c32002-02-18 01:17:00 +0000897**
drh1398ad32005-01-19 23:24:50 +0000898** If the expression is a subquery then Expr.iColumn holds an integer
899** register number containing the result of the subquery. If the
900** subquery gives a constant result, then iTable is -1. If the subquery
901** gives a different answer at different times during statement processing
902** then iTable is the address of a subroutine that computes the subquery.
903**
drh22f70c32002-02-18 01:17:00 +0000904** The Expr.pSelect field points to a SELECT statement. The SELECT might
905** be the right operand of an IN operator. Or, if a scalar SELECT appears
906** in an expression the opcode is TK_SELECT and Expr.pSelect is the only
907** operand.
danielk1977aee18ef2005-03-09 12:26:50 +0000908**
909** If the Expr is of type OP_Column, and the table it is selecting from
910** is a disk table or the "old.*" pseudo-table, then pTab points to the
911** corresponding table definition.
drh75897232000-05-29 14:26:00 +0000912*/
913struct Expr {
drh1cc093c2002-06-24 22:01:57 +0000914 u8 op; /* Operation performed by this node */
drha9fd84b2004-05-18 23:21:35 +0000915 char affinity; /* The affinity of the column or 0 if not a column */
drhb5a20d32003-04-23 12:25:23 +0000916 u8 iDb; /* Database referenced by this expression */
drhe22a3342003-04-22 20:30:37 +0000917 u8 flags; /* Various flags. See below */
drhf2bc0132004-10-04 13:19:23 +0000918 CollSeq *pColl; /* The collation type of the column or 0 */
drh75897232000-05-29 14:26:00 +0000919 Expr *pLeft, *pRight; /* Left and right subnodes */
drhd99f7062002-06-08 23:25:08 +0000920 ExprList *pList; /* A list of expressions used as function arguments
921 ** or in "<expr> IN (<expr-list)" */
drh75897232000-05-29 14:26:00 +0000922 Token token; /* An operand token */
drh6977fea2002-10-22 23:38:04 +0000923 Token span; /* Complete text of the expression */
drh967e8b72000-06-21 13:59:10 +0000924 int iTable, iColumn; /* When op==TK_COLUMN, then this expr node means the
drh8e2ca022002-06-17 17:07:19 +0000925 ** iColumn-th field of the iTable-th table. */
drh13449892005-09-07 21:22:45 +0000926 AggInfo *pAggInfo; /* Used by TK_AGG_COLUMN and TK_AGG_FUNCTION */
927 int iAgg; /* Which entry in pAggInfo->aCol[] or ->aFunc[] */
drh22d6a532005-09-19 21:05:48 +0000928 int iRightJoinTable; /* If EP_FromJoin, the right table of the join */
drhd99f7062002-06-08 23:25:08 +0000929 Select *pSelect; /* When the expression is a sub-select. Also the
930 ** right side of "<expr> IN (<select>)" */
danielk1977aee18ef2005-03-09 12:26:50 +0000931 Table *pTab; /* Table for OP_Column expressions. */
drh75897232000-05-29 14:26:00 +0000932};
933
934/*
drh1f162302002-10-27 19:35:33 +0000935** The following are the meanings of bits in the Expr.flags field.
936*/
drh392e5972005-07-08 14:14:22 +0000937#define EP_FromJoin 0x01 /* Originated in ON or USING clause of a join */
938#define EP_Agg 0x02 /* Contains one or more aggregate functions */
939#define EP_Resolved 0x04 /* IDs have been resolved to COLUMNs */
940#define EP_Error 0x08 /* Expression contains one or more errors */
drhfd357972005-09-09 01:33:19 +0000941#define EP_Distinct 0x10 /* Aggregate function with DISTINCT keyword */
drh392e5972005-07-08 14:14:22 +0000942#define EP_VarSelect 0x20 /* pSelect is correlated, not constant */
drhd2687b72005-08-12 22:56:09 +0000943#define EP_Dequoted 0x40 /* True if the string has been dequoted */
drh1f162302002-10-27 19:35:33 +0000944
945/*
946** These macros can be used to test, set, or clear bits in the
947** Expr.flags field.
948*/
949#define ExprHasProperty(E,P) (((E)->flags&(P))==(P))
950#define ExprHasAnyProperty(E,P) (((E)->flags&(P))!=0)
951#define ExprSetProperty(E,P) (E)->flags|=(P)
952#define ExprClearProperty(E,P) (E)->flags&=~(P)
953
954/*
drh75897232000-05-29 14:26:00 +0000955** A list of expressions. Each expression may optionally have a
956** name. An expr/name combination can be used in several ways, such
957** as the list of "expr AS ID" fields following a "SELECT" or in the
958** list of "ID = expr" items in an UPDATE. A list of expressions can
drhad3cab52002-05-24 02:04:32 +0000959** also be used as the argument to a function, in which case the a.zName
drh75897232000-05-29 14:26:00 +0000960** field is not used.
961*/
962struct ExprList {
963 int nExpr; /* Number of expressions on the list */
drh4305d102003-07-30 12:34:12 +0000964 int nAlloc; /* Number of entries allocated below */
drh9d2985c2005-09-08 01:58:42 +0000965 int iECursor; /* VDBE Cursor associated with this ExprList */
drh6d4abfb2001-10-22 02:58:08 +0000966 struct ExprList_item {
drh75897232000-05-29 14:26:00 +0000967 Expr *pExpr; /* The list of expressions */
968 char *zName; /* Token associated with this expression */
drh8e2ca022002-06-17 17:07:19 +0000969 u8 sortOrder; /* 1 for DESC or 0 for ASC */
970 u8 isAgg; /* True if this is an aggregate like count(*) */
971 u8 done; /* A flag to indicate when processing is finished */
drh75897232000-05-29 14:26:00 +0000972 } *a; /* One entry for each expression */
973};
974
975/*
drhad3cab52002-05-24 02:04:32 +0000976** An instance of this structure can hold a simple list of identifiers,
977** such as the list "a,b,c" in the following statements:
978**
979** INSERT INTO t(a,b,c) VALUES ...;
980** CREATE INDEX idx ON t(a,b,c);
981** CREATE TRIGGER trig BEFORE UPDATE ON t(a,b,c) ...;
982**
983** The IdList.a.idx field is used when the IdList represents the list of
984** column names after a table name in an INSERT statement. In the statement
985**
986** INSERT INTO t(a,b,c) ...
987**
988** If "a" is the k-th column of table "t", then IdList.a[0].idx==k.
drh75897232000-05-29 14:26:00 +0000989*/
990struct IdList {
drh6d4abfb2001-10-22 02:58:08 +0000991 struct IdList_item {
drhad3cab52002-05-24 02:04:32 +0000992 char *zName; /* Name of the identifier */
drh967e8b72000-06-21 13:59:10 +0000993 int idx; /* Index in some Table.aCol[] of a column named zName */
drhad3cab52002-05-24 02:04:32 +0000994 } *a;
drh13449892005-09-07 21:22:45 +0000995 int nId; /* Number of identifiers on the list */
996 int nAlloc; /* Number of entries allocated for a[] below */
drhad3cab52002-05-24 02:04:32 +0000997};
998
999/*
drh51669862004-12-18 18:40:26 +00001000** The bitmask datatype defined below is used for various optimizations.
1001*/
1002typedef unsigned int Bitmask;
1003
1004/*
drhad3cab52002-05-24 02:04:32 +00001005** The following structure describes the FROM clause of a SELECT statement.
1006** Each table or subquery in the FROM clause is a separate element of
1007** the SrcList.a[] array.
drhd24cc422003-03-27 12:51:24 +00001008**
1009** With the addition of multiple database support, the following structure
1010** can also be used to describe a particular table such as the table that
1011** is modified by an INSERT, DELETE, or UPDATE statement. In standard SQL,
1012** such a table must be a simple name: ID. But in SQLite, the table can
1013** now be identified by a database name, a dot, then the table name: ID.ID.
drhad3cab52002-05-24 02:04:32 +00001014*/
1015struct SrcList {
drh939a16d2004-07-15 13:37:22 +00001016 i16 nSrc; /* Number of tables or subqueries in the FROM clause */
1017 i16 nAlloc; /* Number of entries allocated in a[] below */
drhad3cab52002-05-24 02:04:32 +00001018 struct SrcList_item {
drh113088e2003-03-20 01:16:58 +00001019 char *zDatabase; /* Name of database holding this table */
drhad3cab52002-05-24 02:04:32 +00001020 char *zName; /* Name of the table */
1021 char *zAlias; /* The "B" part of a "A AS B" phrase. zName is the "A" */
drhdaffd0e2001-04-11 14:28:42 +00001022 Table *pTab; /* An SQL table corresponding to zName */
1023 Select *pSelect; /* A SELECT statement used in place of a table name */
drhfe05af82005-07-21 03:14:59 +00001024 u8 jointype; /* Type of join between this table and the next */
1025 i16 iCursor; /* The VDBE cursor number used to access this table */
drhad3cab52002-05-24 02:04:32 +00001026 Expr *pOn; /* The ON clause of a join */
1027 IdList *pUsing; /* The USING clause of a join */
drh51669862004-12-18 18:40:26 +00001028 Bitmask colUsed; /* Bit N (1<<N) set if column N or pTab is used */
drh113088e2003-03-20 01:16:58 +00001029 } a[1]; /* One entry for each identifier on the list */
drh75897232000-05-29 14:26:00 +00001030};
1031
1032/*
drh01f3f252002-05-24 16:14:15 +00001033** Permitted values of the SrcList.a.jointype field
1034*/
1035#define JT_INNER 0x0001 /* Any kind of inner or cross join */
drh3dec2232005-09-10 15:28:09 +00001036#define JT_CROSS 0x0002 /* Explicit use of the CROSS keyword */
1037#define JT_NATURAL 0x0004 /* True for a "natural" join */
1038#define JT_LEFT 0x0008 /* Left outer join */
1039#define JT_RIGHT 0x0010 /* Right outer join */
1040#define JT_OUTER 0x0020 /* The "OUTER" keyword is present */
1041#define JT_ERROR 0x0040 /* unknown or unsupported join type */
drh01f3f252002-05-24 16:14:15 +00001042
1043/*
drh6b563442001-11-07 16:48:26 +00001044** For each nested loop in a WHERE clause implementation, the WhereInfo
1045** structure contains a single instance of this structure. This structure
1046** is intended to be private the the where.c module and should not be
1047** access or modified by other modules.
1048*/
1049struct WhereLevel {
drh29dda4a2005-07-21 18:23:20 +00001050 int iFrom; /* Which entry in the FROM clause */
1051 int flags; /* Flags associated with this level */
drh51147ba2005-07-23 22:59:55 +00001052 int iMem; /* First memory cell used by this level */
drh29dda4a2005-07-21 18:23:20 +00001053 int iLeftJoin; /* Memory cell used to implement LEFT OUTER JOIN */
1054 Index *pIdx; /* Index used. NULL if no index */
1055 int iTabCur; /* The VDBE cursor used to access the table */
1056 int iIdxCur; /* The VDBE cursor used to acesss pIdx */
1057 int brk; /* Jump here to break out of the loop */
1058 int cont; /* Jump here to continue with the next loop cycle */
1059 int top; /* First instruction of interior of the loop */
1060 int op, p1, p2; /* Opcode used to terminate the loop */
drh51147ba2005-07-23 22:59:55 +00001061 int nEq; /* Number of == or IN constraints on this loop */
drhe23399f2005-07-22 00:31:39 +00001062 int nIn; /* Number of IN operators constraining this loop */
1063 int *aInLoop; /* Loop terminators for IN operators */
drh6b563442001-11-07 16:48:26 +00001064};
1065
1066/*
drh75897232000-05-29 14:26:00 +00001067** The WHERE clause processing routine has two halves. The
1068** first part does the start of the WHERE loop and the second
1069** half does the tail of the WHERE loop. An instance of
1070** this structure is returned by the first half and passed
1071** into the second half to give some continuity.
1072*/
1073struct WhereInfo {
1074 Parse *pParse;
drhad3cab52002-05-24 02:04:32 +00001075 SrcList *pTabList; /* List of tables in the join */
drh9012bcb2004-12-19 00:11:35 +00001076 int iTop; /* The very beginning of the WHERE loop */
drh19a775c2000-06-05 18:54:46 +00001077 int iContinue; /* Jump here to continue with next record */
1078 int iBreak; /* Jump here to break out of the loop */
drh6b563442001-11-07 16:48:26 +00001079 int nLevel; /* Number of nested loop */
1080 WhereLevel a[1]; /* Information about each nest loop in the WHERE */
drh75897232000-05-29 14:26:00 +00001081};
1082
1083/*
danielk1977b3bce662005-01-29 08:32:43 +00001084** A NameContext defines a context in which to resolve table and column
1085** names. The context consists of a list of tables (the pSrcList) field and
1086** a list of named expression (pEList). The named expression list may
1087** be NULL. The pSrc corresponds to the FROM clause of a SELECT or
1088** to the table being operated on by INSERT, UPDATE, or DELETE. The
1089** pEList corresponds to the result set of a SELECT and is NULL for
1090** other statements.
1091**
1092** NameContexts can be nested. When resolving names, the inner-most
1093** context is searched first. If no match is found, the next outer
1094** context is checked. If there is still no match, the next context
1095** is checked. This process continues until either a match is found
1096** or all contexts are check. When a match is found, the nRef member of
1097** the context containing the match is incremented.
1098**
1099** Each subquery gets a new NameContext. The pNext field points to the
1100** NameContext in the parent query. Thus the process of scanning the
1101** NameContext list corresponds to searching through successively outer
1102** subqueries looking for a match.
1103*/
1104struct NameContext {
1105 Parse *pParse; /* The parser */
1106 SrcList *pSrcList; /* One or more tables used to resolve names */
1107 ExprList *pEList; /* Optional list of named expressions */
1108 int nRef; /* Number of names resolved by this context */
1109 int nErr; /* Number of errors encountered while resolving names */
1110 u8 allowAgg; /* Aggregate functions allowed here */
drh13449892005-09-07 21:22:45 +00001111 u8 hasAgg; /* True if aggregates are seen */
drh06f65412005-11-03 02:03:13 +00001112 u8 isCheck; /* True if resolving names in a CHECK constraint */
danielk1977b3bce662005-01-29 08:32:43 +00001113 int nDepth; /* Depth of subquery recursion. 1 for no recursion */
drh13449892005-09-07 21:22:45 +00001114 AggInfo *pAggInfo; /* Information about aggregates at this level */
danielk1977b3bce662005-01-29 08:32:43 +00001115 NameContext *pNext; /* Next outer name context. NULL for outermost */
1116};
1117
1118/*
drh9bb61fe2000-06-05 16:01:39 +00001119** An instance of the following structure contains all information
1120** needed to generate code for a single SELECT statement.
drha76b5df2002-02-23 02:32:10 +00001121**
drhd11d3822002-06-21 23:01:49 +00001122** nLimit is set to -1 if there is no LIMIT clause. nOffset is set to 0.
1123** If there is a LIMIT clause, the parser sets nLimit to the value of the
1124** limit and nOffset to the value of the offset (or 0 if there is not
1125** offset). But later on, nLimit and nOffset become the memory locations
1126** in the VDBE that record the limit and offset counters.
drh0342b1f2005-09-01 03:07:44 +00001127**
1128** addrOpenVirt[] entries contain the address of OP_OpenVirtual opcodes.
1129** These addresses must be stored so that we can go back and fill in
1130** the P3_KEYINFO and P2 parameters later. Neither the KeyInfo nor
1131** the number of columns in P2 can be computed at the same time
1132** as the OP_OpenVirtual instruction is coded because not
1133** enough information about the compound query is known at that point.
1134** The KeyInfo for addrOpenVirt[0] and [1] contains collating sequences
1135** for the result set. The KeyInfo for addrOpenVirt[2] contains collating
1136** sequences for the ORDER BY clause.
drh9bb61fe2000-06-05 16:01:39 +00001137*/
1138struct Select {
drh9bb61fe2000-06-05 16:01:39 +00001139 ExprList *pEList; /* The fields of the result */
drh7b58dae2003-07-20 01:16:46 +00001140 u8 op; /* One of: TK_UNION TK_ALL TK_INTERSECT TK_EXCEPT */
1141 u8 isDistinct; /* True if the DISTINCT keyword is present */
drh0342b1f2005-09-01 03:07:44 +00001142 u8 isResolved; /* True once sqlite3SelectResolve() has run. */
1143 u8 isAgg; /* True if this is an aggregate query */
1144 u8 usesVirt; /* True if uses an OpenVirtual opcode */
drh4b14b4d2005-09-19 17:35:53 +00001145 u8 disallowOrderBy; /* Do not allow an ORDER BY to be attached if TRUE */
drhad3cab52002-05-24 02:04:32 +00001146 SrcList *pSrc; /* The FROM clause */
drh9bb61fe2000-06-05 16:01:39 +00001147 Expr *pWhere; /* The WHERE clause */
1148 ExprList *pGroupBy; /* The GROUP BY clause */
1149 Expr *pHaving; /* The HAVING clause */
1150 ExprList *pOrderBy; /* The ORDER BY clause */
drh967e8b72000-06-21 13:59:10 +00001151 Select *pPrior; /* Prior select in a compound select statement */
drh0342b1f2005-09-01 03:07:44 +00001152 Select *pRightmost; /* Right-most select in a compound select statement */
danielk1977a2dc3b12005-02-05 12:48:48 +00001153 Expr *pLimit; /* LIMIT expression. NULL means not used. */
1154 Expr *pOffset; /* OFFSET expression. NULL means not used. */
drh7b58dae2003-07-20 01:16:46 +00001155 int iLimit, iOffset; /* Memory registers holding LIMIT & OFFSET counters */
drh0342b1f2005-09-01 03:07:44 +00001156 int addrOpenVirt[3]; /* OP_OpenVirtual opcodes related to this select */
drh9bb61fe2000-06-05 16:01:39 +00001157};
1158
1159/*
drhfef52082000-06-06 01:50:43 +00001160** The results of a select can be distributed in several ways.
1161*/
drh13449892005-09-07 21:22:45 +00001162#define SRT_Union 1 /* Store result as keys in an index */
1163#define SRT_Except 2 /* Remove result from a UNION index */
1164#define SRT_Discard 3 /* Do not save the results anywhere */
drhfef52082000-06-06 01:50:43 +00001165
drh13449892005-09-07 21:22:45 +00001166/* The ORDER BY clause is ignored for all of the above */
1167#define IgnorableOrderby(X) (X<=SRT_Discard)
1168
1169#define SRT_Callback 4 /* Invoke a callback with each row of result */
1170#define SRT_Mem 5 /* Store result in a memory cell */
1171#define SRT_Set 6 /* Store non-null results as keys in an index */
drhd49c16e2005-09-08 02:00:25 +00001172#define SRT_Table 7 /* Store result as data with an automatic rowid */
1173#define SRT_VirtualTab 8 /* Create virtual table and store like SRT_Table */
drh9d2985c2005-09-08 01:58:42 +00001174#define SRT_Subroutine 9 /* Call a subroutine to handle results */
drhec7429a2005-10-06 16:53:14 +00001175#define SRT_Exists 10 /* Store 1 if the result is not empty */
drh22827922000-06-06 17:27:05 +00001176
1177/*
drhf57b3392001-10-08 13:22:32 +00001178** An SQL parser context. A copy of this structure is passed through
1179** the parser and down into all the parser action routine in order to
1180** carry around information that is global to the entire parse.
drhf1974842004-11-05 03:56:00 +00001181**
1182** The structure is divided into two parts. When the parser and code
1183** generate call themselves recursively, the first part of the structure
1184** is constant but the second part is reset at the beginning and end of
1185** each recursion.
drh75897232000-05-29 14:26:00 +00001186*/
1187struct Parse {
drh9bb575f2004-09-06 17:24:11 +00001188 sqlite3 *db; /* The main database structure */
drh4c504392000-10-16 22:06:40 +00001189 int rc; /* Return code from execution */
drh75897232000-05-29 14:26:00 +00001190 char *zErrMsg; /* An error message */
drh75897232000-05-29 14:26:00 +00001191 Vdbe *pVdbe; /* An engine for executing database bytecode */
drh836faa42003-01-11 13:30:57 +00001192 u8 colNamesSet; /* TRUE after OP_ColumnName has been issued to pVdbe */
drhe0bc4042002-06-25 01:09:11 +00001193 u8 nameClash; /* A permanent table name clashes with temp table name */
drha6ecd332004-06-10 00:29:09 +00001194 u8 checkSchema; /* Causes schema cookie check after an error */
drh205f48e2004-11-05 00:43:11 +00001195 u8 nested; /* Number of nested calls to the parser/code generator */
drh75897232000-05-29 14:26:00 +00001196 int nErr; /* Number of errors seen */
drh832508b2002-03-02 17:04:07 +00001197 int nTab; /* Number of previously allocated VDBE cursors */
drh19a775c2000-06-05 18:54:46 +00001198 int nMem; /* Number of memory cells used so far */
drhfef52082000-06-06 01:50:43 +00001199 int nSet; /* Number of sets used so far */
drhffe07b22005-11-03 00:41:17 +00001200 int ckOffset; /* Stack offset to data used by CHECK constraints */
drh80242052004-06-09 00:48:12 +00001201 u32 writeMask; /* Start a write transaction on these databases */
drhfcd35c72005-05-21 02:48:08 +00001202 u32 cookieMask; /* Bitmask of schema verified databases */
1203 int cookieGoto; /* Address of OP_Goto to cookie verifier subroutine */
1204 int cookieValue[MAX_ATTACHED+2]; /* Values of cookies to verify */
drhf1974842004-11-05 03:56:00 +00001205
1206 /* Above is constant between recursions. Below is reset before and after
1207 ** each recursion */
1208
1209 int nVar; /* Number of '?' variables seen in the SQL so far */
1210 int nVarExpr; /* Number of used slots in apVarExpr[] */
1211 int nVarExprAlloc; /* Number of allocated slots in apVarExpr[] */
1212 Expr **apVarExpr; /* Pointers to :aaa and $aaaa wildcard expressions */
1213 u8 explain; /* True if the EXPLAIN flag is found on the query */
drhf1974842004-11-05 03:56:00 +00001214 Token sErrToken; /* The token at which the error occurred */
1215 Token sNameToken; /* Token with unqualified schema object name */
1216 Token sLastToken; /* The last token parsed */
1217 const char *zSql; /* All SQL text */
1218 const char *zTail; /* All SQL text past the last semicolon parsed */
1219 Table *pNewTable; /* A table being constructed by CREATE TABLE */
1220 Trigger *pNewTrigger; /* Trigger under construct by a CREATE TRIGGER */
1221 TriggerStack *trigStack; /* Trigger actions being coded */
1222 const char *zAuthContext; /* The 6th parameter to db->xAuth callbacks */
drh75897232000-05-29 14:26:00 +00001223};
1224
danielk1977d99bc932002-05-16 00:13:12 +00001225/*
drh85e20962003-04-25 17:52:11 +00001226** An instance of the following structure can be declared on a stack and used
1227** to save the Parse.zAuthContext value so that it can be restored later.
1228*/
1229struct AuthContext {
1230 const char *zAuthContext; /* Put saved Parse.zAuthContext here */
1231 Parse *pParse; /* The Parse structure */
1232};
1233
1234/*
drhf0863fe2005-06-12 21:35:51 +00001235** Bitfield flags for P2 value in OP_Insert and OP_Delete
rdcb0c374f2004-02-20 22:53:38 +00001236*/
1237#define OPFLAG_NCHANGE 1 /* Set to update db->nChange */
1238#define OPFLAG_LASTROWID 2 /* Set to update db->lastRowid */
danielk197794eb6a12005-12-15 15:22:08 +00001239#define OPFLAG_ISUPDATE 4 /* This OP_Insert is an sql UPDATE */
rdcb0c374f2004-02-20 22:53:38 +00001240
1241/*
danielk1977d99bc932002-05-16 00:13:12 +00001242 * Each trigger present in the database schema is stored as an instance of
1243 * struct Trigger.
1244 *
1245 * Pointers to instances of struct Trigger are stored in two ways.
drh9bb575f2004-09-06 17:24:11 +00001246 * 1. In the "trigHash" hash table (part of the sqlite3* that represents the
danielk1977d99bc932002-05-16 00:13:12 +00001247 * database). This allows Trigger structures to be retrieved by name.
1248 * 2. All triggers associated with a single table form a linked list, using the
drhad3cab52002-05-24 02:04:32 +00001249 * pNext member of struct Trigger. A pointer to the first element of the
1250 * linked list is stored as the "pTrigger" member of the associated
1251 * struct Table.
danielk1977d99bc932002-05-16 00:13:12 +00001252 *
drhad3cab52002-05-24 02:04:32 +00001253 * The "step_list" member points to the first element of a linked list
1254 * containing the SQL statements specified as the trigger program.
danielk1977d99bc932002-05-16 00:13:12 +00001255 */
danielk1977c3f9bad2002-05-15 08:30:12 +00001256struct Trigger {
drhdc379452002-05-15 12:45:43 +00001257 char *name; /* The name of the trigger */
1258 char *table; /* The table or view to which the trigger applies */
drhf0f258b2003-04-21 18:48:45 +00001259 u8 iDb; /* Database containing this trigger */
drh79a519c2003-05-17 19:04:03 +00001260 u8 iTabDb; /* Database containing Trigger.table */
drhf0f258b2003-04-21 18:48:45 +00001261 u8 op; /* One of TK_DELETE, TK_UPDATE, TK_INSERT */
drhdca76842004-12-07 14:06:13 +00001262 u8 tr_tm; /* One of TRIGGER_BEFORE, TRIGGER_AFTER */
drhdc379452002-05-15 12:45:43 +00001263 Expr *pWhen; /* The WHEN clause of the expresion (may be NULL) */
1264 IdList *pColumns; /* If this is an UPDATE OF <column-list> trigger,
danielk1977d99bc932002-05-16 00:13:12 +00001265 the <column-list> is stored here */
drhdc379452002-05-15 12:45:43 +00001266 int foreach; /* One of TK_ROW or TK_STATEMENT */
drh4312db52003-06-03 01:47:11 +00001267 Token nameToken; /* Token containing zName. Use during parsing only */
danielk1977c3f9bad2002-05-15 08:30:12 +00001268
drhdc379452002-05-15 12:45:43 +00001269 TriggerStep *step_list; /* Link list of trigger program steps */
drhdc379452002-05-15 12:45:43 +00001270 Trigger *pNext; /* Next trigger associated with the table */
danielk1977c3f9bad2002-05-15 08:30:12 +00001271};
1272
danielk1977d99bc932002-05-16 00:13:12 +00001273/*
drhdca76842004-12-07 14:06:13 +00001274** A trigger is either a BEFORE or an AFTER trigger. The following constants
1275** determine which.
1276**
1277** If there are multiple triggers, you might of some BEFORE and some AFTER.
1278** In that cases, the constants below can be ORed together.
1279*/
1280#define TRIGGER_BEFORE 1
1281#define TRIGGER_AFTER 2
1282
1283/*
danielk1977d99bc932002-05-16 00:13:12 +00001284 * An instance of struct TriggerStep is used to store a single SQL statement
1285 * that is a part of a trigger-program.
1286 *
1287 * Instances of struct TriggerStep are stored in a singly linked list (linked
1288 * using the "pNext" member) referenced by the "step_list" member of the
1289 * associated struct Trigger instance. The first element of the linked list is
1290 * the first step of the trigger-program.
1291 *
1292 * The "op" member indicates whether this is a "DELETE", "INSERT", "UPDATE" or
1293 * "SELECT" statement. The meanings of the other members is determined by the
1294 * value of "op" as follows:
1295 *
1296 * (op == TK_INSERT)
1297 * orconf -> stores the ON CONFLICT algorithm
1298 * pSelect -> If this is an INSERT INTO ... SELECT ... statement, then
1299 * this stores a pointer to the SELECT statement. Otherwise NULL.
1300 * target -> A token holding the name of the table to insert into.
1301 * pExprList -> If this is an INSERT INTO ... VALUES ... statement, then
1302 * this stores values to be inserted. Otherwise NULL.
1303 * pIdList -> If this is an INSERT INTO ... (<column-names>) VALUES ...
drhad3cab52002-05-24 02:04:32 +00001304 * statement, then this stores the column-names to be
1305 * inserted into.
danielk1977d99bc932002-05-16 00:13:12 +00001306 *
1307 * (op == TK_DELETE)
1308 * target -> A token holding the name of the table to delete from.
1309 * pWhere -> The WHERE clause of the DELETE statement if one is specified.
1310 * Otherwise NULL.
1311 *
1312 * (op == TK_UPDATE)
1313 * target -> A token holding the name of the table to update rows of.
1314 * pWhere -> The WHERE clause of the UPDATE statement if one is specified.
1315 * Otherwise NULL.
1316 * pExprList -> A list of the columns to update and the expressions to update
danielk19774adee202004-05-08 08:23:19 +00001317 * them to. See sqlite3Update() documentation of "pChanges"
drhad3cab52002-05-24 02:04:32 +00001318 * argument.
danielk1977d99bc932002-05-16 00:13:12 +00001319 *
1320 */
1321struct TriggerStep {
1322 int op; /* One of TK_DELETE, TK_UPDATE, TK_INSERT, TK_SELECT */
1323 int orconf; /* OE_Rollback etc. */
drha69d9162003-04-17 22:57:53 +00001324 Trigger *pTrig; /* The trigger that this step is a part of */
danielk1977c3f9bad2002-05-15 08:30:12 +00001325
danielk1977d99bc932002-05-16 00:13:12 +00001326 Select *pSelect; /* Valid for SELECT and sometimes
1327 INSERT steps (when pExprList == 0) */
1328 Token target; /* Valid for DELETE, UPDATE, INSERT steps */
1329 Expr *pWhere; /* Valid for DELETE, UPDATE steps */
1330 ExprList *pExprList; /* Valid for UPDATE statements and sometimes
1331 INSERT steps (when pSelect == 0) */
1332 IdList *pIdList; /* Valid for INSERT statements only */
1333
1334 TriggerStep * pNext; /* Next in the link-list */
1335};
1336
1337/*
1338 * An instance of struct TriggerStack stores information required during code
1339 * generation of a single trigger program. While the trigger program is being
1340 * coded, its associated TriggerStack instance is pointed to by the
1341 * "pTriggerStack" member of the Parse structure.
1342 *
1343 * The pTab member points to the table that triggers are being coded on. The
1344 * newIdx member contains the index of the vdbe cursor that points at the temp
1345 * table that stores the new.* references. If new.* references are not valid
1346 * for the trigger being coded (for example an ON DELETE trigger), then newIdx
1347 * is set to -1. The oldIdx member is analogous to newIdx, for old.* references.
1348 *
1349 * The ON CONFLICT policy to be used for the trigger program steps is stored
1350 * as the orconf member. If this is OE_Default, then the ON CONFLICT clause
1351 * specified for individual triggers steps is used.
1352 *
1353 * struct TriggerStack has a "pNext" member, to allow linked lists to be
1354 * constructed. When coding nested triggers (triggers fired by other triggers)
1355 * each nested trigger stores its parent trigger's TriggerStack as the "pNext"
1356 * pointer. Once the nested trigger has been coded, the pNext value is restored
1357 * to the pTriggerStack member of the Parse stucture and coding of the parent
1358 * trigger continues.
1359 *
1360 * Before a nested trigger is coded, the linked list pointed to by the
1361 * pTriggerStack is scanned to ensure that the trigger is not about to be coded
1362 * recursively. If this condition is detected, the nested trigger is not coded.
1363 */
1364struct TriggerStack {
1365 Table *pTab; /* Table that triggers are currently being coded on */
1366 int newIdx; /* Index of vdbe cursor to "new" temp table */
1367 int oldIdx; /* Index of vdbe cursor to "old" temp table */
1368 int orconf; /* Current orconf policy */
danielk19776f349032002-06-11 02:25:40 +00001369 int ignoreJump; /* where to jump to for a RAISE(IGNORE) */
drhe22a3342003-04-22 20:30:37 +00001370 Trigger *pTrigger; /* The trigger currently being coded */
1371 TriggerStack *pNext; /* Next trigger down on the trigger stack */
danielk1977d99bc932002-05-16 00:13:12 +00001372};
1373
1374/*
drhf26e09c2003-05-31 16:21:12 +00001375** The following structure contains information used by the sqliteFix...
1376** routines as they walk the parse tree to make database references
1377** explicit.
1378*/
1379typedef struct DbFixer DbFixer;
1380struct DbFixer {
1381 Parse *pParse; /* The parsing context. Error messages written here */
1382 const char *zDb; /* Make sure all objects are contained in this database */
1383 const char *zType; /* Type of the container - used for error messages */
1384 const Token *pName; /* Name of the container - used for error messages */
1385};
1386
1387/*
drh234c39d2004-07-24 03:30:47 +00001388** A pointer to this structure is used to communicate information
1389** from sqlite3Init and OP_ParseSchema into the sqlite3InitCallback.
1390*/
1391typedef struct {
drh9bb575f2004-09-06 17:24:11 +00001392 sqlite3 *db; /* The database being initialized */
drh234c39d2004-07-24 03:30:47 +00001393 char **pzErrMsg; /* Error message stored here */
1394} InitData;
1395
drhb6c29892004-11-22 19:12:19 +00001396/*
danielk1977d99bc932002-05-16 00:13:12 +00001397 * This global flag is set for performance testing of triggers. When it is set
1398 * SQLite will perform the overhead of building new and old trigger references
1399 * even when no triggers exist
1400 */
drh38f82712004-06-18 17:10:16 +00001401extern int sqlite3_always_code_trigger_setup;
danielk1977c3f9bad2002-05-15 08:30:12 +00001402
drh75897232000-05-29 14:26:00 +00001403/*
drh49285702005-09-17 15:20:26 +00001404** The SQLITE_CORRUPT_BKPT macro can be either a constant (for production
1405** builds) or a function call (for debugging). If it is a function call,
1406** it allows the operator to set a breakpoint at the spot where database
1407** corruption is first detected.
1408*/
1409#ifdef SQLITE_DEBUG
1410 extern int sqlite3Corrupt(void);
1411# define SQLITE_CORRUPT_BKPT sqlite3Corrupt()
1412#else
1413# define SQLITE_CORRUPT_BKPT SQLITE_CORRUPT
1414#endif
1415
1416/*
drh75897232000-05-29 14:26:00 +00001417** Internal function prototypes
1418*/
danielk19774adee202004-05-08 08:23:19 +00001419int sqlite3StrICmp(const char *, const char *);
1420int sqlite3StrNICmp(const char *, const char *, int);
1421int sqlite3HashNoCase(const char *, int);
danielk19778a6b5412004-05-24 07:04:25 +00001422int sqlite3IsNumber(const char*, int*, u8);
danielk19774adee202004-05-08 08:23:19 +00001423int sqlite3Compare(const char *, const char *);
1424int sqlite3SortCompare(const char *, const char *);
1425void sqlite3RealToSortable(double r, char *);
danielk19772e588c72005-12-09 14:25:08 +00001426
1427void *sqlite3Malloc(int);
1428void *sqlite3MallocRaw(int);
1429void sqlite3Free(void*);
1430void *sqlite3Realloc(void*,int);
1431char *sqlite3StrDup(const char*);
1432char *sqlite3StrNDup(const char*, int);
danielk19774adee202004-05-08 08:23:19 +00001433# define sqlite3CheckMemory(a,b)
drh53f733c2005-09-16 02:38:09 +00001434void sqlite3ReallocOrFree(void**,int);
drh998da3a2004-06-19 15:22:56 +00001435void sqlite3FreeX(void*);
drh132d8d62005-05-22 20:12:37 +00001436void *sqlite3MallocX(int);
danielk19772e588c72005-12-09 14:25:08 +00001437
danielk19774adee202004-05-08 08:23:19 +00001438char *sqlite3MPrintf(const char*, ...);
1439char *sqlite3VMPrintf(const char*, va_list);
drhe54ca3f2004-06-07 01:52:14 +00001440void sqlite3DebugPrintf(const char*, ...);
drhfe63d1c2004-09-08 20:13:04 +00001441void *sqlite3TextToPtr(const char*);
drh41f58522005-06-06 15:06:39 +00001442void sqlite3SetString(char **, ...);
danielk19774adee202004-05-08 08:23:19 +00001443void sqlite3ErrorMsg(Parse*, const char*, ...);
1444void sqlite3Dequote(char*);
drhd2687b72005-08-12 22:56:09 +00001445void sqlite3DequoteExpr(Expr*);
drh2646da72005-12-09 20:02:05 +00001446int sqlite3KeywordCode(const unsigned char*, int);
danielk19774adee202004-05-08 08:23:19 +00001447int sqlite3RunParser(Parse*, const char*, char **);
drh80242052004-06-09 00:48:12 +00001448void sqlite3FinishCoding(Parse*);
drhe4e72072004-11-23 01:47:30 +00001449Expr *sqlite3Expr(int, Expr*, Expr*, const Token*);
drh4e0cff62004-11-05 05:10:28 +00001450Expr *sqlite3RegisterExpr(Parse*,Token*);
drh91bb0ee2004-09-01 03:06:34 +00001451Expr *sqlite3ExprAnd(Expr*, Expr*);
danielk19774adee202004-05-08 08:23:19 +00001452void sqlite3ExprSpan(Expr*,Token*,Token*);
1453Expr *sqlite3ExprFunction(ExprList*, Token*);
drhfa6bc002004-09-07 16:19:52 +00001454void sqlite3ExprAssignVarNumber(Parse*, Expr*);
danielk19774adee202004-05-08 08:23:19 +00001455void sqlite3ExprDelete(Expr*);
1456ExprList *sqlite3ExprListAppend(ExprList*,Expr*,Token*);
1457void sqlite3ExprListDelete(ExprList*);
drh9bb575f2004-09-06 17:24:11 +00001458int sqlite3Init(sqlite3*, char**);
drh234c39d2004-07-24 03:30:47 +00001459int sqlite3InitCallback(void*, int, char**, char**);
danielk197791cf71b2004-06-26 06:37:06 +00001460void sqlite3Pragma(Parse*,Token*,Token*,Token*,int);
drh9bb575f2004-09-06 17:24:11 +00001461void sqlite3ResetInternalSchema(sqlite3*, int);
danielk19774adee202004-05-08 08:23:19 +00001462void sqlite3BeginParse(Parse*,int);
drh9bb575f2004-09-06 17:24:11 +00001463void sqlite3RollbackInternalChanges(sqlite3*);
1464void sqlite3CommitInternalChanges(sqlite3*);
danielk19774adee202004-05-08 08:23:19 +00001465Table *sqlite3ResultSetOfSelect(Parse*,char*,Select*);
1466void sqlite3OpenMasterTable(Vdbe *v, int);
danielk1977cbb18d22004-05-28 11:37:27 +00001467void sqlite3StartTable(Parse*,Token*,Token*,Token*,int,int);
danielk19774adee202004-05-08 08:23:19 +00001468void sqlite3AddColumn(Parse*,Token*);
1469void sqlite3AddNotNull(Parse*, int);
drh205f48e2004-11-05 00:43:11 +00001470void sqlite3AddPrimaryKey(Parse*, ExprList*, int, int);
drhffe07b22005-11-03 00:41:17 +00001471void sqlite3AddCheckConstraint(Parse*, Expr*);
drh487e2622005-06-25 18:42:14 +00001472void sqlite3AddColumnType(Parse*,Token*);
danielk19777977a172004-11-09 12:44:37 +00001473void sqlite3AddDefaultValue(Parse*,Expr*);
drhd3d39e92004-05-20 22:16:29 +00001474void sqlite3AddCollateType(Parse*, const char*, int);
danielk197719a8e7e2005-03-17 05:03:38 +00001475void sqlite3EndTable(Parse*,Token*,Token*,Select*);
drhb7f91642004-10-31 02:22:47 +00001476
1477#ifndef SQLITE_OMIT_VIEW
1478 void sqlite3CreateView(Parse*,Token*,Token*,Token*,Select*,int);
1479 int sqlite3ViewGetColumnNames(Parse*,Table*);
1480#else
1481# define sqlite3ViewGetColumnNames(A,B) 0
1482#endif
1483
danielk1977a8858102004-05-28 12:11:21 +00001484void sqlite3DropTable(Parse*, SrcList*, int);
drh9bb575f2004-09-06 17:24:11 +00001485void sqlite3DeleteTable(sqlite3*, Table*);
danielk19774adee202004-05-08 08:23:19 +00001486void sqlite3Insert(Parse*, SrcList*, ExprList*, Select*, IdList*, int);
drh13449892005-09-07 21:22:45 +00001487int sqlite3ArrayAllocate(void**,int,int);
danielk19774adee202004-05-08 08:23:19 +00001488IdList *sqlite3IdListAppend(IdList*, Token*);
1489int sqlite3IdListIndex(IdList*,const char*);
1490SrcList *sqlite3SrcListAppend(SrcList*, Token*, Token*);
1491void sqlite3SrcListAddAlias(SrcList*, Token*);
1492void sqlite3SrcListAssignCursors(Parse*, SrcList*);
1493void sqlite3IdListDelete(IdList*);
1494void sqlite3SrcListDelete(SrcList*);
danielk19770202b292004-06-09 09:55:16 +00001495void sqlite3CreateIndex(Parse*,Token*,Token*,SrcList*,ExprList*,int,Token*,
danielk1977ef2cb632004-05-29 02:37:19 +00001496 Token*);
danielk19774adee202004-05-08 08:23:19 +00001497void sqlite3DropIndex(Parse*, SrcList*);
1498void sqlite3AddKeyType(Vdbe*, ExprList*);
1499void sqlite3AddIdxKeyType(Vdbe*, Index*);
danielk1977b3bce662005-01-29 08:32:43 +00001500int sqlite3Select(Parse*, Select*, int, int, Select*, int, int*, char *aff);
danielk19774adee202004-05-08 08:23:19 +00001501Select *sqlite3SelectNew(ExprList*,SrcList*,Expr*,ExprList*,Expr*,ExprList*,
danielk1977a2dc3b12005-02-05 12:48:48 +00001502 int,Expr*,Expr*);
danielk19774adee202004-05-08 08:23:19 +00001503void sqlite3SelectDelete(Select*);
1504void sqlite3SelectUnbind(Select*);
1505Table *sqlite3SrcListLookup(Parse*, SrcList*);
1506int sqlite3IsReadOnly(Parse*, Table*, int);
drhad6d9462004-09-19 02:15:24 +00001507void sqlite3OpenTableForReading(Vdbe*, int iCur, Table*);
drhb6c29892004-11-22 19:12:19 +00001508void sqlite3OpenTable(Vdbe*, int iCur, Table*, int);
danielk19774adee202004-05-08 08:23:19 +00001509void sqlite3DeleteFrom(Parse*, SrcList*, Expr*);
1510void sqlite3Update(Parse*, SrcList*, ExprList*, Expr*, int);
drhf8db1bc2005-04-22 02:38:37 +00001511WhereInfo *sqlite3WhereBegin(Parse*, SrcList*, Expr*, ExprList**);
danielk19774adee202004-05-08 08:23:19 +00001512void sqlite3WhereEnd(WhereInfo*);
1513void sqlite3ExprCode(Parse*, Expr*);
drh25303782004-12-07 15:41:48 +00001514void sqlite3ExprCodeAndCache(Parse*, Expr*);
drhf9b596e2004-05-26 16:54:42 +00001515int sqlite3ExprCodeExprList(Parse*, ExprList*);
danielk19774adee202004-05-08 08:23:19 +00001516void sqlite3ExprIfTrue(Parse*, Expr*, int, int);
1517void sqlite3ExprIfFalse(Parse*, Expr*, int, int);
drh205f48e2004-11-05 00:43:11 +00001518void sqlite3NextedParse(Parse*, const char*, ...);
drh9bb575f2004-09-06 17:24:11 +00001519Table *sqlite3FindTable(sqlite3*,const char*, const char*);
danielk19774adee202004-05-08 08:23:19 +00001520Table *sqlite3LocateTable(Parse*,const char*, const char*);
drh9bb575f2004-09-06 17:24:11 +00001521Index *sqlite3FindIndex(sqlite3*,const char*, const char*);
1522void sqlite3UnlinkAndDeleteTable(sqlite3*,int,const char*);
1523void sqlite3UnlinkAndDeleteIndex(sqlite3*,int,const char*);
danielk19774adee202004-05-08 08:23:19 +00001524void sqlite3Vacuum(Parse*, Token*);
drh9bb575f2004-09-06 17:24:11 +00001525int sqlite3RunVacuum(char**, sqlite3*);
drha99db3b2004-06-19 14:49:12 +00001526char *sqlite3NameFromToken(Token*);
danielk19774adee202004-05-08 08:23:19 +00001527int sqlite3ExprCheck(Parse*, Expr*, int, int*);
danielk19774adee202004-05-08 08:23:19 +00001528int sqlite3ExprCompare(Expr*, Expr*);
drhcce7d172000-05-31 15:34:51 +00001529int sqliteFuncId(Token*);
danielk1977b3bce662005-01-29 08:32:43 +00001530int sqlite3ExprResolveNames(NameContext *, Expr *);
danielk1977a58fdfb2005-02-08 07:50:40 +00001531int sqlite3ExprAnalyzeAggregates(NameContext*, Expr*);
drh5d9a4af2005-08-30 00:54:01 +00001532int sqlite3ExprAnalyzeAggList(NameContext*,ExprList*);
danielk19774adee202004-05-08 08:23:19 +00001533Vdbe *sqlite3GetVdbe(Parse*);
1534void sqlite3Randomness(int, void*);
drh9bb575f2004-09-06 17:24:11 +00001535void sqlite3RollbackAll(sqlite3*);
danielk19774adee202004-05-08 08:23:19 +00001536void sqlite3CodeVerifySchema(Parse*, int);
drh684917c2004-10-05 02:41:42 +00001537void sqlite3BeginTransaction(Parse*, int);
danielk19774adee202004-05-08 08:23:19 +00001538void sqlite3CommitTransaction(Parse*);
1539void sqlite3RollbackTransaction(Parse*);
1540int sqlite3ExprIsConstant(Expr*);
drheb55bd22005-06-30 17:04:21 +00001541int sqlite3ExprIsConstantOrFunction(Expr*);
danielk19774adee202004-05-08 08:23:19 +00001542int sqlite3ExprIsInteger(Expr*, int*);
1543int sqlite3IsRowid(const char*);
drh9bb575f2004-09-06 17:24:11 +00001544void sqlite3GenerateRowDelete(sqlite3*, Vdbe*, Table*, int, int);
1545void sqlite3GenerateRowIndexDelete(sqlite3*, Vdbe*, Table*, int, char*);
drh51846b52004-05-28 16:00:21 +00001546void sqlite3GenerateIndexKey(Vdbe*, Index*, int);
danielk19774adee202004-05-08 08:23:19 +00001547void sqlite3GenerateConstraintChecks(Parse*,Table*,int,char*,int,int,int,int);
1548void sqlite3CompleteInsertion(Parse*, Table*, int, char*, int, int, int);
drh290c1942004-08-21 17:54:45 +00001549void sqlite3OpenTableAndIndices(Parse*, Table*, int, int);
danielk19774adee202004-05-08 08:23:19 +00001550void sqlite3BeginWriteOperation(Parse*, int, int);
danielk19774adee202004-05-08 08:23:19 +00001551Expr *sqlite3ExprDup(Expr*);
1552void sqlite3TokenCopy(Token*, Token*);
1553ExprList *sqlite3ExprListDup(ExprList*);
1554SrcList *sqlite3SrcListDup(SrcList*);
1555IdList *sqlite3IdListDup(IdList*);
1556Select *sqlite3SelectDup(Select*);
drh9bb575f2004-09-06 17:24:11 +00001557FuncDef *sqlite3FindFunction(sqlite3*,const char*,int,int,u8,int);
1558void sqlite3RegisterBuiltinFunctions(sqlite3*);
1559void sqlite3RegisterDateTimeFunctions(sqlite3*);
1560int sqlite3SafetyOn(sqlite3*);
1561int sqlite3SafetyOff(sqlite3*);
1562int sqlite3SafetyCheck(sqlite3*);
1563void sqlite3ChangeCookie(sqlite3*, Vdbe*, int);
drhb7f91642004-10-31 02:22:47 +00001564
1565#ifndef SQLITE_OMIT_TRIGGER
1566 void sqlite3BeginTrigger(Parse*, Token*,Token*,int,int,IdList*,SrcList*,
1567 int,Expr*,int);
1568 void sqlite3FinishTrigger(Parse*, TriggerStep*, Token*);
1569 void sqlite3DropTrigger(Parse*, SrcList*);
1570 void sqlite3DropTriggerPtr(Parse*, Trigger*, int);
drhdca76842004-12-07 14:06:13 +00001571 int sqlite3TriggersExist(Parse*, Table*, int, ExprList*);
drhb7f91642004-10-31 02:22:47 +00001572 int sqlite3CodeRowTrigger(Parse*, int, ExprList*, int, Table *, int, int,
1573 int, int);
1574 void sqliteViewTriggers(Parse*, Table*, Expr*, int, ExprList*);
1575 void sqlite3DeleteTriggerStep(TriggerStep*);
1576 TriggerStep *sqlite3TriggerSelectStep(Select*);
1577 TriggerStep *sqlite3TriggerInsertStep(Token*, IdList*, ExprList*,Select*,int);
1578 TriggerStep *sqlite3TriggerUpdateStep(Token*, ExprList*, Expr*, int);
1579 TriggerStep *sqlite3TriggerDeleteStep(Token*, Expr*);
1580 void sqlite3DeleteTrigger(Trigger*);
1581 void sqlite3UnlinkAndDeleteTrigger(sqlite3*,int,const char*);
1582#else
1583# define sqlite3TriggersExist(A,B,C,D,E,F) 0
1584# define sqlite3DeleteTrigger(A)
1585# define sqlite3DropTriggerPtr(A,B,C)
1586# define sqlite3UnlinkAndDeleteTrigger(A,B,C)
1587# define sqlite3CodeRowTrigger(A,B,C,D,E,F,G,H,I) 0
1588#endif
1589
danielk19774adee202004-05-08 08:23:19 +00001590int sqlite3JoinType(Parse*, Token*, Token*, Token*);
danielk19770202b292004-06-09 09:55:16 +00001591void sqlite3CreateForeignKey(Parse*, ExprList*, Token*, ExprList*, int);
danielk19774adee202004-05-08 08:23:19 +00001592void sqlite3DeferForeignKey(Parse*, int);
drhed6c8672003-01-12 18:02:16 +00001593#ifndef SQLITE_OMIT_AUTHORIZATION
danielk19774adee202004-05-08 08:23:19 +00001594 void sqlite3AuthRead(Parse*,Expr*,SrcList*);
1595 int sqlite3AuthCheck(Parse*,int, const char*, const char*, const char*);
1596 void sqlite3AuthContextPush(Parse*, AuthContext*, const char*);
1597 void sqlite3AuthContextPop(AuthContext*);
drhed6c8672003-01-12 18:02:16 +00001598#else
danielk19774adee202004-05-08 08:23:19 +00001599# define sqlite3AuthRead(a,b,c)
1600# define sqlite3AuthCheck(a,b,c,d,e) SQLITE_OK
1601# define sqlite3AuthContextPush(a,b,c)
1602# define sqlite3AuthContextPop(a) ((void)(a))
drhed6c8672003-01-12 18:02:16 +00001603#endif
danielk1977f744bb52005-12-06 17:19:11 +00001604void sqlite3Attach(Parse*, Expr*, Expr*, Expr*);
1605void sqlite3Detach(Parse*, Expr*);
drh9bb575f2004-09-06 17:24:11 +00001606int sqlite3BtreeFactory(const sqlite3 *db, const char *zFilename,
drh90f5ecb2004-07-22 01:19:35 +00001607 int omitJournal, int nCache, Btree **ppBtree);
danielk19774adee202004-05-08 08:23:19 +00001608int sqlite3FixInit(DbFixer*, Parse*, int, const char*, const Token*);
1609int sqlite3FixSrcList(DbFixer*, SrcList*);
1610int sqlite3FixSelect(DbFixer*, Select*);
1611int sqlite3FixExpr(DbFixer*, Expr*);
1612int sqlite3FixExprList(DbFixer*, ExprList*);
1613int sqlite3FixTriggerStep(DbFixer*, TriggerStep*);
drh487e2622005-06-25 18:42:14 +00001614int sqlite3AtoF(const char *z, double*);
danielk19776f8a5032004-05-10 10:34:51 +00001615char *sqlite3_snprintf(int,char*,const char*,...);
drhfec19aa2004-05-19 20:41:03 +00001616int sqlite3GetInt32(const char *, int*);
drhfec19aa2004-05-19 20:41:03 +00001617int sqlite3FitsIn64Bits(const char *);
danielk19776622cce2004-05-20 11:00:52 +00001618int sqlite3utf16ByteLen(const void *pData, int nChar);
1619int sqlite3utf8CharLen(const char *pData, int nByte);
drh4e5ffc52004-08-31 00:52:37 +00001620int sqlite3ReadUtf8(const unsigned char *);
danielk1977192ac1d2004-05-10 07:17:30 +00001621int sqlite3PutVarint(unsigned char *, u64);
danielk197790e4d952004-05-10 10:05:53 +00001622int sqlite3GetVarint(const unsigned char *, u64 *);
drh6d2fb152004-05-14 16:50:06 +00001623int sqlite3GetVarint32(const unsigned char *, u32 *);
danielk1977192ac1d2004-05-10 07:17:30 +00001624int sqlite3VarintLen(u64 v);
danielk1977a37cdde2004-05-16 11:15:36 +00001625void sqlite3IndexAffinityStr(Vdbe *, Index *);
1626void sqlite3TableAffinityStr(Vdbe *, Table *);
danielk1977e014a832004-05-17 10:48:57 +00001627char sqlite3CompareAffinity(Expr *pExpr, char aff2);
danielk1977e014a832004-05-17 10:48:57 +00001628int sqlite3IndexAffinityOk(Expr *pExpr, char idx_affinity);
danielk1977bf3b7212004-05-18 10:06:24 +00001629char sqlite3ExprAffinity(Expr *pExpr);
drheb2e1762004-05-27 01:53:56 +00001630int sqlite3atoi64(const char*, i64*);
drh9bb575f2004-09-06 17:24:11 +00001631void sqlite3Error(sqlite3*, int, const char*,...);
danielk1977cbb18d22004-05-28 11:37:27 +00001632void *sqlite3HexToBlob(const char *z);
danielk1977ef2cb632004-05-29 02:37:19 +00001633int sqlite3TwoPartName(Parse *, Token *, Token *, Token **);
danielk1977f20b21c2004-05-31 23:56:42 +00001634const char *sqlite3ErrStr(int);
danielk1977d02eb1f2004-06-06 09:44:03 +00001635int sqlite3ReadUniChar(const char *zStr, int *pOffset, u8 *pEnc, int fold);
danielk19778a414492004-06-29 08:59:35 +00001636int sqlite3ReadSchema(Parse *pParse);
drh9bb575f2004-09-06 17:24:11 +00001637CollSeq *sqlite3FindCollSeq(sqlite3*,u8 enc, const char *,int,int);
danielk19770202b292004-06-09 09:55:16 +00001638CollSeq *sqlite3LocateCollSeq(Parse *pParse, const char *zName, int nName);
danielk19777cedc8d2004-06-10 10:50:08 +00001639CollSeq *sqlite3ExprCollSeq(Parse *pParse, Expr *pExpr);
1640int sqlite3CheckCollSeq(Parse *, CollSeq *);
1641int sqlite3CheckIndexCollSeq(Parse *, Index *);
danielk1977d8123362004-06-12 09:25:12 +00001642int sqlite3CheckObjectName(Parse *, const char *);
danielk1977b28af712004-06-21 06:50:26 +00001643void sqlite3VdbeSetChanges(sqlite3 *, int);
danielk1977f4618892004-06-28 13:09:11 +00001644void sqlite3utf16Substr(sqlite3_context *,int,sqlite3_value **);
danielk19774e6af132004-06-10 14:01:08 +00001645
1646const void *sqlite3ValueText(sqlite3_value*, u8);
1647int sqlite3ValueBytes(sqlite3_value*, u8);
danielk1977bfd6cce2004-06-18 04:24:54 +00001648void sqlite3ValueSetStr(sqlite3_value*, int, const void *,u8, void(*)(void*));
danielk19774e6af132004-06-10 14:01:08 +00001649void sqlite3ValueFree(sqlite3_value*);
drh4f26bb62005-09-08 14:17:20 +00001650sqlite3_value *sqlite3ValueNew(void);
drhaf9a7c22005-12-15 03:04:10 +00001651char *sqlite3utf16to8(const void*, int);
danielk1977aee18ef2005-03-09 12:26:50 +00001652int sqlite3ValueFromExpr(Expr *, u8, u8, sqlite3_value **);
1653void sqlite3ValueApplyAffinity(sqlite3_value *, u8, u8);
drh4e5ffc52004-08-31 00:52:37 +00001654extern const unsigned char sqlite3UpperToLower[];
danielk1977a0bf2652004-11-04 14:30:04 +00001655void sqlite3RootPageMoved(Db*, int, int);
drh4343fea2004-11-05 23:46:15 +00001656void sqlite3Reindex(Parse*, Token*, Token*);
drh1f01ec12005-02-15 21:36:18 +00001657void sqlite3AlterFunctions(sqlite3*);
danielk19779fd2a9a2004-11-12 13:42:30 +00001658void sqlite3AlterRenameTable(Parse*, SrcList*, Token*);
1659int sqlite3GetToken(const unsigned char *, int *);
drh2958a4e2004-11-12 03:56:15 +00001660void sqlite3NestedParse(Parse*, const char*, ...);
drhd89bd002005-01-22 03:03:54 +00001661void sqlite3ExpirePreparedStatements(sqlite3*);
danielk1977b3bce662005-01-29 08:32:43 +00001662void sqlite3CodeSubselect(Parse *, Expr *);
1663int sqlite3SelectResolve(Parse *, Select *, NameContext *);
danielk1977aee18ef2005-03-09 12:26:50 +00001664void sqlite3ColumnDefault(Vdbe *, Table *, int);
danielk197719a8e7e2005-03-17 05:03:38 +00001665void sqlite3AlterFinishAddColumn(Parse *, Token *);
1666void sqlite3AlterBeginAddColumn(Parse *, SrcList *);
drh2e66f0b2005-04-28 17:18:48 +00001667const char *sqlite3TestErrorName(int);
danielk19774dade032005-05-25 10:45:10 +00001668CollSeq *sqlite3GetCollSeq(sqlite3*, CollSeq *, const char *, int);
drh8a512562005-11-14 22:29:05 +00001669char sqlite3AffinityType(const Token*);
drh9f18e8a2005-07-08 12:13:04 +00001670void sqlite3Analyze(Parse*, Token*, Token*);
drha4afb652005-07-09 02:16:02 +00001671int sqlite3InvokeBusyHandler(BusyHandler*);
drhff2d5ea2005-07-23 00:41:48 +00001672int sqlite3FindDb(sqlite3*, Token*);
drh497e4462005-07-23 03:18:40 +00001673void sqlite3AnalysisLoad(sqlite3*,int iDB);
drh51147ba2005-07-23 22:59:55 +00001674void sqlite3DefaultRowEst(Index*);
drh55ef4d92005-08-14 01:20:37 +00001675void sqlite3RegisterLikeFunctions(sqlite3*, int);
drhd64fe2f2005-08-28 17:00:23 +00001676int sqlite3IsLikeFunction(sqlite3*,Expr*,int*,char*);
danielk1977261919c2005-12-06 12:52:59 +00001677SqliteTsd *sqlite3Tsd();
danielk1977f744bb52005-12-06 17:19:11 +00001678void sqlite3AttachFunctions(sqlite3 *);
danielk1977e3026632004-06-22 11:29:02 +00001679
danielk19772e588c72005-12-09 14:25:08 +00001680void sqlite3MallocClearFailed();
1681#ifdef NDEBUG
1682 #define sqlite3MallocDisallow()
1683 #define sqlite3MallocAllow()
1684#else
1685 void sqlite3MallocDisallow();
1686 void sqlite3MallocAllow();
1687#endif
1688
danielk1977fd9a0a42005-05-24 12:01:00 +00001689#ifdef SQLITE_SSE
1690#include "sseInt.h"
1691#endif
1692
danielk1977e3026632004-06-22 11:29:02 +00001693#endif