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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**
danielk197790e4d952004-05-10 10:05:53 +000014** @(#) $Id: sqliteInt.h,v 1.227 2004/05/10 10:05:54 danielk1977 Exp $
drh75897232000-05-29 14:26:00 +000015*/
drh58f391b2002-11-20 11:55:18 +000016#include "config.h"
drh75897232000-05-29 14:26:00 +000017#include "sqlite.h"
drhbeae3192001-09-22 18:12:08 +000018#include "hash.h"
drh75897232000-05-29 14:26:00 +000019#include "parse.h"
drh75897232000-05-29 14:26:00 +000020#include <stdio.h>
21#include <stdlib.h>
22#include <string.h>
23#include <assert.h>
24
drh967e8b72000-06-21 13:59:10 +000025/*
drha1b351a2001-09-14 16:42:12 +000026** The maximum number of in-memory pages to use for the main database
27** table and for temporary tables.
28*/
drh603240c2002-03-05 01:11:12 +000029#define MAX_PAGES 2000
30#define TEMP_PAGES 500
drha1b351a2001-09-14 16:42:12 +000031
32/*
drh0bd1f4e2002-06-06 18:54:39 +000033** If the following macro is set to 1, then NULL values are considered
34** distinct for the SELECT DISTINCT statement and for UNION or EXCEPT
35** compound queries. No other SQL database engine (among those tested)
36** works this way except for OCELOT. But the SQL92 spec implies that
37** this is how things should work.
38**
39** If the following macro is set to 0, then NULLs are indistinct for
40** SELECT DISTINCT and for UNION.
41*/
42#define NULL_ALWAYS_DISTINCT 0
43
44/*
45** If the following macro is set to 1, then NULL values are considered
46** distinct when determining whether or not two entries are the same
47** in a UNIQUE index. This is the way PostgreSQL, Oracle, DB2, MySQL,
48** OCELOT, and Firebird all work. The SQL92 spec explicitly says this
49** is the way things are suppose to work.
50**
51** If the following macro is set to 0, the NULLs are indistinct for
52** a UNIQUE index. In this mode, you can only have a single NULL entry
53** for a column declared UNIQUE. This is the way Informix and SQL Server
54** work.
55*/
56#define NULL_DISTINCT_FOR_UNIQUE 1
57
58/*
drh665de472003-03-31 13:36:09 +000059** The maximum number of attached databases. This must be at least 2
60** in order to support the main database file (0) and the file used to
jplyona3643a22003-05-10 03:04:34 +000061** hold temporary tables (1). And it must be less than 256 because
drh665de472003-03-31 13:36:09 +000062** an unsigned character is used to stored the database index.
63*/
64#define MAX_ATTACHED 10
65
66/*
drh13bff812003-04-15 01:19:47 +000067** The next macro is used to determine where TEMP tables and indices
68** are stored. Possible values:
69**
70** 0 Always use a temporary files
71** 1 Use a file unless overridden by "PRAGMA temp_store"
72** 2 Use memory unless overridden by "PRAGMA temp_store"
73** 3 Always use memory
74*/
75#ifndef TEMP_STORE
76# define TEMP_STORE 1
77#endif
78
79/*
80** When building SQLite for embedded systems where memory is scarce,
81** you can define one or more of the following macros to omit extra
82** features of the library and thus keep the size of the library to
83** a minimum.
84*/
85/* #define SQLITE_OMIT_AUTHORIZATION 1 */
drh70ce3f02003-04-15 19:22:22 +000086/* #define SQLITE_OMIT_INMEMORYDB 1 */
drh13bff812003-04-15 01:19:47 +000087/* #define SQLITE_OMIT_VACUUM 1 */
drh0a5294b2003-11-11 23:30:35 +000088/* #define SQLITE_OMIT_DATETIME_FUNCS 1 */
danielk1977348bb5d2003-10-18 09:37:26 +000089/* #define SQLITE_OMIT_PROGRESS_CALLBACK 1 */
drh13bff812003-04-15 01:19:47 +000090
91/*
drh5a2c2c22001-11-21 02:21:11 +000092** Integers of known sizes. These typedefs might change for architectures
93** where the sizes very. Preprocessor macros are available so that the
94** types can be conveniently redefined at compile-type. Like this:
95**
96** cc '-DUINTPTR_TYPE=long long int' ...
drh41a2b482001-01-20 19:52:49 +000097*/
drha34b6762004-05-07 13:30:42 +000098#ifndef INT64_TYPE
99# define INT64_TYPE long long int
100#endif
drh3aac2dd2004-04-26 14:10:20 +0000101#ifndef UINT64_TYPE
102# define UINT64_TYPE unsigned long long int
103#endif
drh5a2c2c22001-11-21 02:21:11 +0000104#ifndef UINT32_TYPE
105# define UINT32_TYPE unsigned int
106#endif
107#ifndef UINT16_TYPE
108# define UINT16_TYPE unsigned short int
109#endif
110#ifndef UINT8_TYPE
111# define UINT8_TYPE unsigned char
112#endif
drh905793e2004-02-21 13:31:09 +0000113#ifndef INT8_TYPE
114# define INT8_TYPE signed char
115#endif
drh5a2c2c22001-11-21 02:21:11 +0000116#ifndef INTPTR_TYPE
drh58f391b2002-11-20 11:55:18 +0000117# if SQLITE_PTR_SZ==4
118# define INTPTR_TYPE int
119# else
120# define INTPTR_TYPE long long
121# endif
drh5a2c2c22001-11-21 02:21:11 +0000122#endif
drh3aac2dd2004-04-26 14:10:20 +0000123typedef UINT64_TYPE u64; /* 8-byte unsigned integer */
drh5a2c2c22001-11-21 02:21:11 +0000124typedef UINT32_TYPE u32; /* 4-byte unsigned integer */
125typedef UINT16_TYPE u16; /* 2-byte unsigned integer */
126typedef UINT8_TYPE u8; /* 1-byte unsigned integer */
drh905793e2004-02-21 13:31:09 +0000127typedef UINT8_TYPE i8; /* 1-byte signed integer */
drh5a2c2c22001-11-21 02:21:11 +0000128typedef INTPTR_TYPE ptr; /* Big enough to hold a pointer */
129typedef unsigned INTPTR_TYPE uptr; /* Big enough to hold a pointer */
130
131/*
drh905793e2004-02-21 13:31:09 +0000132** Defer sourcing vdbe.h until after the "u8" typedef is defined.
133*/
134#include "vdbe.h"
drh3aac2dd2004-04-26 14:10:20 +0000135#include "btree.h"
drh905793e2004-02-21 13:31:09 +0000136
137/*
drh384eef32004-01-07 03:04:27 +0000138** Most C compilers these days recognize "long double", don't they?
139** Just in case we encounter one that does not, we will create a macro
140** for long double so that it can be easily changed to just "double".
141*/
142#ifndef LONGDOUBLE_TYPE
143# define LONGDOUBLE_TYPE long double
144#endif
145
146/*
drh5a2c2c22001-11-21 02:21:11 +0000147** This macro casts a pointer to an integer. Useful for doing
148** pointer arithmetic.
149*/
150#define Addr(X) ((uptr)X)
drh41a2b482001-01-20 19:52:49 +0000151
152/*
drh872ff862001-09-15 14:43:39 +0000153** The maximum number of bytes of data that can be put into a single
drh80ff32f2001-11-04 18:32:46 +0000154** row of a single table. The upper bound on this limit is 16777215
155** bytes (or 16MB-1). We have arbitrarily set the limit to just 1MB
156** here because the overflow page chain is inefficient for really big
157** records and we want to discourage people from thinking that
158** multi-megabyte records are OK. If your needs are different, you can
159** change this define and recompile to increase or decrease the record
160** size.
drh9ac717d2003-05-29 17:43:08 +0000161**
162** The 16777198 is computed as follows: 238 bytes of payload on the
163** original pages plus 16448 overflow pages each holding 1020 bytes of
164** data.
drh872ff862001-09-15 14:43:39 +0000165*/
drh8372b8d2003-05-29 17:50:55 +0000166#define MAX_BYTES_PER_ROW 1048576
167/* #define MAX_BYTES_PER_ROW 16777198 */
drh872ff862001-09-15 14:43:39 +0000168
169/*
drh967e8b72000-06-21 13:59:10 +0000170** If memory allocation problems are found, recompile with
171**
172** -DMEMORY_DEBUG=1
173**
174** to enable some sanity checking on malloc() and free(). To
175** check for memory leaks, recompile with
176**
177** -DMEMORY_DEBUG=2
178**
179** and a line of text will be written to standard error for
180** each malloc() and free(). This output can be analyzed
181** by an AWK script to determine if there are any leaks.
182*/
drhdcc581c2000-05-30 13:44:19 +0000183#ifdef MEMORY_DEBUG
danielk19774adee202004-05-08 08:23:19 +0000184# define sqliteMalloc(X) sqlite3Malloc_(X,1,__FILE__,__LINE__)
185# define sqliteMallocRaw(X) sqlite3Malloc_(X,0,__FILE__,__LINE__)
186# define sqliteFree(X) sqlite3Free_(X,__FILE__,__LINE__)
187# define sqliteRealloc(X,Y) sqlite3Realloc_(X,Y,__FILE__,__LINE__)
188# define sqliteStrDup(X) sqlite3StrDup_(X,__FILE__,__LINE__)
189# define sqliteStrNDup(X,Y) sqlite3StrNDup_(X,Y,__FILE__,__LINE__)
190 void sqlite3StrRealloc(char**);
drhc3c2fc92000-05-31 22:58:39 +0000191#else
danielk19774adee202004-05-08 08:23:19 +0000192# define sqlite3Realloc_(X,Y) sqliteRealloc(X,Y)
193# define sqlite3StrRealloc(X)
drhdcc581c2000-05-30 13:44:19 +0000194#endif
195
drh75897232000-05-29 14:26:00 +0000196/*
drhdaffd0e2001-04-11 14:28:42 +0000197** This variable gets set if malloc() ever fails. After it gets set,
198** the SQLite library shuts down permanently.
199*/
200extern int sqlite_malloc_failed;
201
202/*
drh6e142f52000-06-08 13:36:40 +0000203** The following global variables are used for testing and debugging
drh8c82b352000-12-10 18:23:50 +0000204** only. They only work if MEMORY_DEBUG is defined.
drh6e142f52000-06-08 13:36:40 +0000205*/
206#ifdef MEMORY_DEBUG
drh8c82b352000-12-10 18:23:50 +0000207extern int sqlite_nMalloc; /* Number of sqliteMalloc() calls */
208extern int sqlite_nFree; /* Number of sqliteFree() calls */
209extern int sqlite_iMallocFail; /* Fail sqliteMalloc() after this many calls */
drh6e142f52000-06-08 13:36:40 +0000210#endif
211
212/*
drh75897232000-05-29 14:26:00 +0000213** Name of the master database table. The master database table
214** is a special table that holds the names and attributes of all
215** user tables and indices.
216*/
drhe0bc4042002-06-25 01:09:11 +0000217#define MASTER_NAME "sqlite_master"
218#define TEMP_MASTER_NAME "sqlite_temp_master"
drh75897232000-05-29 14:26:00 +0000219
220/*
danielk19778e150812004-05-10 01:17:37 +0000221** The root-page of the master database table.
222*/
223#define MASTER_ROOT 1
224
225/*
drhed6c8672003-01-12 18:02:16 +0000226** The name of the schema table.
227*/
228#define SCHEMA_TABLE(x) (x?TEMP_MASTER_NAME:MASTER_NAME)
229
230/*
drh75897232000-05-29 14:26:00 +0000231** A convenience macro that returns the number of elements in
232** an array.
233*/
234#define ArraySize(X) (sizeof(X)/sizeof(X[0]))
235
236/*
237** Forward references to structures
238*/
drh7020f652000-06-03 18:06:52 +0000239typedef struct Column Column;
drh75897232000-05-29 14:26:00 +0000240typedef struct Table Table;
241typedef struct Index Index;
242typedef struct Instruction Instruction;
243typedef struct Expr Expr;
244typedef struct ExprList ExprList;
245typedef struct Parse Parse;
246typedef struct Token Token;
247typedef struct IdList IdList;
drhad3cab52002-05-24 02:04:32 +0000248typedef struct SrcList SrcList;
drh75897232000-05-29 14:26:00 +0000249typedef struct WhereInfo WhereInfo;
drh6b563442001-11-07 16:48:26 +0000250typedef struct WhereLevel WhereLevel;
drh9bb61fe2000-06-05 16:01:39 +0000251typedef struct Select Select;
drh22827922000-06-06 17:27:05 +0000252typedef struct AggExpr AggExpr;
drh0bce8352002-02-28 00:41:10 +0000253typedef struct FuncDef FuncDef;
danielk1977c3f9bad2002-05-15 08:30:12 +0000254typedef struct Trigger Trigger;
255typedef struct TriggerStep TriggerStep;
256typedef struct TriggerStack TriggerStack;
drhc2eef3b2002-08-31 18:53:06 +0000257typedef struct FKey FKey;
drh001bbcb2003-03-19 03:14:00 +0000258typedef struct Db Db;
drh85e20962003-04-25 17:52:11 +0000259typedef struct AuthContext AuthContext;
drh001bbcb2003-03-19 03:14:00 +0000260
261/*
262** Each database file to be accessed by the system is an instance
263** of the following structure. There are normally two of these structures
264** in the sqlite.aDb[] array. aDb[0] is the main database file and
drha69d9162003-04-17 22:57:53 +0000265** aDb[1] is the database file used to hold temporary tables. Additional
266** databases may be attached.
drh001bbcb2003-03-19 03:14:00 +0000267*/
268struct Db {
269 char *zName; /* Name of this database */
270 Btree *pBt; /* The B*Tree structure for this database file */
271 int schema_cookie; /* Database schema version number for this file */
drhd24cc422003-03-27 12:51:24 +0000272 Hash tblHash; /* All tables indexed by name */
273 Hash idxHash; /* All (named) indices indexed by name */
274 Hash trigHash; /* All triggers indexed by name */
275 Hash aFKey; /* Foreign keys indexed by to-table */
drh1aa49652003-06-02 23:14:13 +0000276 u8 inTrans; /* 0: not writable. 1: Transaction. 2: Checkpoint */
drhd24cc422003-03-27 12:51:24 +0000277 u16 flags; /* Flags associated with this database */
drh4d189ca2004-02-12 18:46:38 +0000278 void *pAux; /* Auxiliary data. Usually NULL */
279 void (*xFreeAux)(void*); /* Routine to free pAux */
drh001bbcb2003-03-19 03:14:00 +0000280};
drh75897232000-05-29 14:26:00 +0000281
282/*
drh8bf8dc92003-05-17 17:35:10 +0000283** These macros can be used to test, set, or clear bits in the
284** Db.flags field.
285*/
286#define DbHasProperty(D,I,P) (((D)->aDb[I].flags&(P))==(P))
287#define DbHasAnyProperty(D,I,P) (((D)->aDb[I].flags&(P))!=0)
288#define DbSetProperty(D,I,P) (D)->aDb[I].flags|=(P)
289#define DbClearProperty(D,I,P) (D)->aDb[I].flags&=~(P)
290
291/*
292** Allowed values for the DB.flags field.
293**
294** The DB_Locked flag is set when the first OP_Transaction or OP_Checkpoint
295** opcode is emitted for a database. This prevents multiple occurances
296** of those opcodes for the same database in the same program. Similarly,
297** the DB_Cookie flag is set when the OP_VerifyCookie opcode is emitted,
298** and prevents duplicate OP_VerifyCookies from taking up space and slowing
299** down execution.
300**
301** The DB_SchemaLoaded flag is set after the database schema has been
302** read into internal hash tables.
303**
304** DB_UnresetViews means that one or more views have column names that
305** have been filled out. If the schema changes, these column names might
306** changes and so the view will need to be reset.
307*/
308#define DB_Locked 0x0001 /* OP_Transaction opcode has been emitted */
309#define DB_Cookie 0x0002 /* OP_VerifyCookie opcode has been emiited */
310#define DB_SchemaLoaded 0x0004 /* The schema has been loaded */
311#define DB_UnresetViews 0x0008 /* Some views have defined column names */
312
313
314/*
drhc9b84a12002-06-20 11:36:48 +0000315** Each database is an instance of the following structure.
316**
317** The sqlite.file_format is initialized by the database file
318** and helps determines how the data in the database file is
319** represented. This field allows newer versions of the library
320** to read and write older databases. The various file formats
321** are as follows:
322**
323** file_format==1 Version 2.1.0.
324** file_format==2 Version 2.2.0. Add support for INTEGER PRIMARY KEY.
drh491791a2002-07-18 00:34:09 +0000325** file_format==3 Version 2.6.0. Fix empty-string index bug.
326** file_format==4 Version 2.7.0. Add support for separate numeric and
drhc9b84a12002-06-20 11:36:48 +0000327** text datatypes.
drh13bff812003-04-15 01:19:47 +0000328**
329** The sqlite.temp_store determines where temporary database files
330** are stored. If 1, then a file is created to hold those tables. If
331** 2, then they are held in memory. 0 means use the default value in
332** the TEMP_STORE macro.
rdcb0c374f2004-02-20 22:53:38 +0000333**
334** The sqlite.lastRowid records the last insert rowid generated by an
335** insert statement. Inserts on views do not affect its value. Each
336** trigger has its own context, so that lastRowid can be updated inside
337** triggers as usual. The previous value will be restored once the trigger
338** exits. Upon entering a before or instead of trigger, lastRowid is no
339** longer (since after version 2.8.12) reset to -1.
340**
341** The sqlite.nChange does not count changes within triggers and keeps no
342** context. It is reset at start of sqlite_exec.
343** The sqlite.lsChange represents the number of changes made by the last
344** insert, update, or delete statement. It remains constant throughout the
345** length of a statement and is then updated by OP_SetCounts. It keeps a
346** context stack just like lastRowid so that the count of changes
347** within a trigger is not seen outside the trigger. Changes to views do not
348** affect the value of lsChange.
349** The sqlite.csChange keeps track of the number of current changes (since
350** the last statement) and is used to update sqlite_lsChange.
drh75897232000-05-29 14:26:00 +0000351*/
352struct sqlite {
drh001bbcb2003-03-19 03:14:00 +0000353 int nDb; /* Number of backends currently in use */
354 Db *aDb; /* All backends */
355 Db aDbStatic[2]; /* Static space for the 2 default backends */
drh5e00f6c2001-09-13 13:46:56 +0000356 int flags; /* Miscellanous flags. See below */
drh973b6e32003-02-12 14:09:42 +0000357 u8 file_format; /* What file format version is this database? */
358 u8 safety_level; /* How aggressive at synching data to disk */
drh94e92032003-02-16 22:21:32 +0000359 u8 want_to_close; /* Close after all VDBEs are deallocated */
drh1d85d932004-02-14 23:05:52 +0000360 u8 temp_store; /* 1=file, 2=memory, 0=compile-time default */
361 u8 onError; /* Default conflict algorithm */
drh001bbcb2003-03-19 03:14:00 +0000362 int next_cookie; /* Next value of aDb[0].schema_cookie */
drhcd61c282002-03-06 22:01:34 +0000363 int cache_size; /* Number of pages to use in the cache */
drh5e00f6c2001-09-13 13:46:56 +0000364 int nTable; /* Number of tables in the database */
365 void *pBusyArg; /* 1st Argument to the busy callback */
drh353f57e2000-08-02 12:26:28 +0000366 int (*xBusyCallback)(void *,const char*,int); /* The busy callback */
drhaa940ea2004-01-15 02:44:03 +0000367 void *pCommitArg; /* Argument to xCommitCallback() */
368 int (*xCommitCallback)(void*);/* Invoked at every commit. */
drh0bce8352002-02-28 00:41:10 +0000369 Hash aFunc; /* All functions that can be in SQL exprs */
rdcb0c374f2004-02-20 22:53:38 +0000370 int lastRowid; /* ROWID of most recent insert (see above) */
drh5cf8e8c2002-02-19 22:42:05 +0000371 int priorNewRowid; /* Last randomly generated ROWID */
drh247be432002-05-10 05:44:55 +0000372 int magic; /* Magic number for detect library misuse */
rdcb0c374f2004-02-20 22:53:38 +0000373 int nChange; /* Number of rows changed (see above) */
374 int lsChange; /* Last statement change count (see above) */
375 int csChange; /* Current statement change count (see above) */
danielk19774adee202004-05-08 08:23:19 +0000376 struct sqlite3InitInfo { /* Information used during initialization */
drh1d85d932004-02-14 23:05:52 +0000377 int iDb; /* When back is being initialized */
378 int newTnum; /* Rootpage of table being initialized */
379 u8 busy; /* TRUE if currently initializing */
380 } init;
drh326dce72003-01-29 14:06:07 +0000381 struct Vdbe *pVdbe; /* List of active virtual machines */
drh18de4822003-01-16 16:28:53 +0000382 void (*xTrace)(void*,const char*); /* Trace function */
383 void *pTraceArg; /* Argument to the trace function */
drhed6c8672003-01-12 18:02:16 +0000384#ifndef SQLITE_OMIT_AUTHORIZATION
drhe22a3342003-04-22 20:30:37 +0000385 int (*xAuth)(void*,int,const char*,const char*,const char*,const char*);
386 /* Access authorization function */
drhed6c8672003-01-12 18:02:16 +0000387 void *pAuthArg; /* 1st argument to the access auth function */
388#endif
danielk1977348bb5d2003-10-18 09:37:26 +0000389#ifndef SQLITE_OMIT_PROGRESS_CALLBACK
390 int (*xProgress)(void *); /* The progress callback */
391 void *pProgressArg; /* Argument to the progress callback */
392 int nProgressOps; /* Number of opcodes for progress callback */
393#endif
danielk19774adee202004-05-08 08:23:19 +0000394
395 char *zErrMsg; /* Most recent error message (UTF-8 encoded) */
drh75897232000-05-29 14:26:00 +0000396};
397
398/*
drh8bf8dc92003-05-17 17:35:10 +0000399** Possible values for the sqlite.flags and or Db.flags fields.
400**
401** On sqlite.flags, the SQLITE_InTrans value means that we have
402** executed a BEGIN. On Db.flags, SQLITE_InTrans means a statement
403** transaction is active on that particular database file.
drh75897232000-05-29 14:26:00 +0000404*/
drh5e00f6c2001-09-13 13:46:56 +0000405#define SQLITE_VdbeTrace 0x00000001 /* True to trace VDBE execution */
406#define SQLITE_Initialized 0x00000002 /* True after initialization */
407#define SQLITE_Interrupt 0x00000004 /* Cancel current operation */
408#define SQLITE_InTrans 0x00000008 /* True if in a transaction */
409#define SQLITE_InternChanges 0x00000010 /* Uncommitted Hash table changes */
drh382c0242001-10-06 16:33:02 +0000410#define SQLITE_FullColNames 0x00000020 /* Show full column names on SELECT */
drhfcabd462004-02-20 14:50:58 +0000411#define SQLITE_ShortColNames 0x00000040 /* Show short columns names */
412#define SQLITE_CountRows 0x00000080 /* Count rows changed by INSERT, */
drh1bee3d72001-10-15 00:44:35 +0000413 /* DELETE, or UPDATE and return */
414 /* the count using a callback. */
drhfcabd462004-02-20 14:50:58 +0000415#define SQLITE_NullCallback 0x00000100 /* Invoke the callback once if the */
drh6a535342001-10-19 16:44:56 +0000416 /* result set is empty */
drh8bf8dc92003-05-17 17:35:10 +0000417#define SQLITE_ReportTypes 0x00000200 /* Include information on datatypes */
drh5080aaa2002-07-11 12:18:16 +0000418 /* in 4th argument of callback */
drh58b95762000-06-02 01:17:37 +0000419
420/*
drh247be432002-05-10 05:44:55 +0000421** Possible values for the sqlite.magic field.
422** The numbers are obtained at random and have no special meaning, other
423** than being distinct from one another.
424*/
425#define SQLITE_MAGIC_OPEN 0xa029a697 /* Database is open */
426#define SQLITE_MAGIC_CLOSED 0x9f3c2d33 /* Database is closed */
427#define SQLITE_MAGIC_BUSY 0xf03b7906 /* Database currently in use */
428#define SQLITE_MAGIC_ERROR 0xb5357930 /* An SQLITE_MISUSE error occurred */
429
430/*
drh0bce8352002-02-28 00:41:10 +0000431** Each SQL function is defined by an instance of the following
432** structure. A pointer to this structure is stored in the sqlite.aFunc
drh8e0a2f92002-02-23 23:45:45 +0000433** hash table. When multiple functions have the same name, the hash table
434** points to a linked list of these structures.
drh28037572000-08-02 13:47:41 +0000435*/
drh0bce8352002-02-28 00:41:10 +0000436struct FuncDef {
drh0bd1f4e2002-06-06 18:54:39 +0000437 void (*xFunc)(sqlite_func*,int,const char**); /* Regular function */
drh56c0e922002-03-12 23:10:04 +0000438 void (*xStep)(sqlite_func*,int,const char**); /* Aggregate function step */
drh1350b032002-02-27 19:00:20 +0000439 void (*xFinalize)(sqlite_func*); /* Aggregate function finializer */
drh268380c2004-02-25 13:47:31 +0000440 signed char nArg; /* Number of arguments. -1 means unlimited */
441 signed char dataType; /* Arg that determines datatype. -1=NUMERIC, */
442 /* -2=TEXT. -3=SQLITE_ARGS */
443 u8 includeTypes; /* Add datatypes to args of xFunc and xStep */
444 void *pUserData; /* User data parameter */
445 FuncDef *pNext; /* Next function with same name */
drh8e0a2f92002-02-23 23:45:45 +0000446};
drh28037572000-08-02 13:47:41 +0000447
448/*
drh967e8b72000-06-21 13:59:10 +0000449** information about each column of an SQL table is held in an instance
drh7020f652000-06-03 18:06:52 +0000450** of this structure.
451*/
452struct Column {
drh967e8b72000-06-21 13:59:10 +0000453 char *zName; /* Name of this column */
454 char *zDflt; /* Default value of this column */
drh382c0242001-10-06 16:33:02 +0000455 char *zType; /* Data type for this column */
drh4a324312001-12-21 14:30:42 +0000456 u8 notNull; /* True if there is a NOT NULL constraint */
drh78100cc2003-08-23 22:40:53 +0000457 u8 isPrimKey; /* True if this column is part of the PRIMARY KEY */
drh8e2ca022002-06-17 17:07:19 +0000458 u8 sortOrder; /* Some combination of SQLITE_SO_... values */
drhfcabd462004-02-20 14:50:58 +0000459 u8 dottedName; /* True if zName contains a "." character */
drh7020f652000-06-03 18:06:52 +0000460};
461
462/*
drh8e2ca022002-06-17 17:07:19 +0000463** The allowed sort orders.
464**
465** The TEXT and NUM values use bits that do not overlap with DESC and ASC.
466** That way the two can be combined into a single number.
467*/
468#define SQLITE_SO_UNK 0 /* Use the default collating type. (SCT_NUM) */
469#define SQLITE_SO_TEXT 2 /* Sort using memcmp() */
danielk19774adee202004-05-08 08:23:19 +0000470#define SQLITE_SO_NUM 4 /* Sort using sqlite3Compare() */
drh8e2ca022002-06-17 17:07:19 +0000471#define SQLITE_SO_TYPEMASK 6 /* Mask to extract the collating sequence */
472#define SQLITE_SO_ASC 0 /* Sort in ascending order */
473#define SQLITE_SO_DESC 1 /* Sort in descending order */
474#define SQLITE_SO_DIRMASK 1 /* Mask to extract the sort direction */
475
476/*
drh22f70c32002-02-18 01:17:00 +0000477** Each SQL table is represented in memory by an instance of the
478** following structure.
479**
drhd24cc422003-03-27 12:51:24 +0000480** Table.zName is the name of the table. The case of the original
drh22f70c32002-02-18 01:17:00 +0000481** CREATE TABLE statement is stored, but case is not significant for
482** comparisons.
483**
drhd24cc422003-03-27 12:51:24 +0000484** Table.nCol is the number of columns in this table. Table.aCol is a
drh22f70c32002-02-18 01:17:00 +0000485** pointer to an array of Column structures, one for each column.
486**
drhd24cc422003-03-27 12:51:24 +0000487** If the table has an INTEGER PRIMARY KEY, then Table.iPKey is the index of
488** the column that is that key. Otherwise Table.iPKey is negative. Note
drh22f70c32002-02-18 01:17:00 +0000489** that the datatype of the PRIMARY KEY must be INTEGER for this field to
490** be set. An INTEGER PRIMARY KEY is used as the rowid for each row of
491** the table. If a table has no INTEGER PRIMARY KEY, then a random rowid
drhd24cc422003-03-27 12:51:24 +0000492** is generated for each row of the table. Table.hasPrimKey is true if
drh22f70c32002-02-18 01:17:00 +0000493** the table has any PRIMARY KEY, INTEGER or otherwise.
494**
drhd24cc422003-03-27 12:51:24 +0000495** Table.tnum is the page number for the root BTree page of the table in the
496** database file. If Table.iDb is the index of the database table backend
497** in sqlite.aDb[]. 0 is for the main database and 1 is for the file that
498** holds temporary tables and indices. If Table.isTransient
drh22f70c32002-02-18 01:17:00 +0000499** is true, then the table is stored in a file that is automatically deleted
drhd24cc422003-03-27 12:51:24 +0000500** when the VDBE cursor to the table is closed. In this case Table.tnum
drh22f70c32002-02-18 01:17:00 +0000501** refers VDBE cursor number that holds the table open, not to the root
502** page number. Transient tables are used to hold the results of a
503** sub-query that appears instead of a real table name in the FROM clause
504** of a SELECT statement.
drh75897232000-05-29 14:26:00 +0000505*/
506struct Table {
drh967e8b72000-06-21 13:59:10 +0000507 char *zName; /* Name of the table */
drh967e8b72000-06-21 13:59:10 +0000508 int nCol; /* Number of columns in this table */
509 Column *aCol; /* Information about each column */
drhc8392582001-12-31 02:48:51 +0000510 int iPKey; /* If not less then 0, use aCol[iPKey] as the primary key */
drh967e8b72000-06-21 13:59:10 +0000511 Index *pIndex; /* List of SQL indexes on this table. */
drh22f70c32002-02-18 01:17:00 +0000512 int tnum; /* Root BTree node for this table (see note above) */
drha76b5df2002-02-23 02:32:10 +0000513 Select *pSelect; /* NULL for tables. Points to definition if a view. */
drh717e6402001-09-27 03:22:32 +0000514 u8 readOnly; /* True if this table should not be written by the user */
drhd24cc422003-03-27 12:51:24 +0000515 u8 iDb; /* Index into sqlite.aDb[] of the backend for this table */
drh22f70c32002-02-18 01:17:00 +0000516 u8 isTransient; /* True if automatically deleted when VDBE finishes */
drh4a324312001-12-21 14:30:42 +0000517 u8 hasPrimKey; /* True if there exists a primary key */
drh9cfcf5d2002-01-29 18:41:24 +0000518 u8 keyConf; /* What to do in case of uniqueness conflict on iPKey */
danielk1977c3f9bad2002-05-15 08:30:12 +0000519 Trigger *pTrigger; /* List of SQL triggers on this table */
drhc2eef3b2002-08-31 18:53:06 +0000520 FKey *pFKey; /* Linked list of all foreign keys in this table */
drh75897232000-05-29 14:26:00 +0000521};
522
523/*
drhc2eef3b2002-08-31 18:53:06 +0000524** Each foreign key constraint is an instance of the following structure.
525**
526** A foreign key is associated with two tables. The "from" table is
527** the table that contains the REFERENCES clause that creates the foreign
528** key. The "to" table is the table that is named in the REFERENCES clause.
529** Consider this example:
530**
531** CREATE TABLE ex1(
532** a INTEGER PRIMARY KEY,
533** b INTEGER CONSTRAINT fk1 REFERENCES ex2(x)
534** );
535**
536** For foreign key "fk1", the from-table is "ex1" and the to-table is "ex2".
537**
538** Each REFERENCES clause generates an instance of the following structure
539** which is attached to the from-table. The to-table need not exist when
540** the from-table is created. The existance of the to-table is not checked
541** until an attempt is made to insert data into the from-table.
542**
drhea1ba172003-04-20 00:00:23 +0000543** The sqlite.aFKey hash table stores pointers to this structure
drhc2eef3b2002-08-31 18:53:06 +0000544** given the name of a to-table. For each to-table, all foreign keys
545** associated with that table are on a linked list using the FKey.pNextTo
546** field.
547*/
548struct FKey {
549 Table *pFrom; /* The table that constains the REFERENCES clause */
550 FKey *pNextFrom; /* Next foreign key in pFrom */
551 char *zTo; /* Name of table that the key points to */
552 FKey *pNextTo; /* Next foreign key that points to zTo */
553 int nCol; /* Number of columns in this key */
554 struct sColMap { /* Mapping of columns in pFrom to columns in zTo */
555 int iFrom; /* Index of column in pFrom */
556 char *zCol; /* Name of column in zTo. If 0 use PRIMARY KEY */
557 } *aCol; /* One entry for each of nCol column s */
558 u8 isDeferred; /* True if constraint checking is deferred till COMMIT */
559 u8 updateConf; /* How to resolve conflicts that occur on UPDATE */
560 u8 deleteConf; /* How to resolve conflicts that occur on DELETE */
561 u8 insertConf; /* How to resolve conflicts that occur on INSERT */
562};
563
564/*
565** SQLite supports many different ways to resolve a contraint
drh22f70c32002-02-18 01:17:00 +0000566** error. ROLLBACK processing means that a constraint violation
drh0bd1f4e2002-06-06 18:54:39 +0000567** causes the operation in process to fail and for the current transaction
drh1c928532002-01-31 15:54:21 +0000568** to be rolled back. ABORT processing means the operation in process
569** fails and any prior changes from that one operation are backed out,
570** but the transaction is not rolled back. FAIL processing means that
571** the operation in progress stops and returns an error code. But prior
572** changes due to the same operation are not backed out and no rollback
573** occurs. IGNORE means that the particular row that caused the constraint
574** error is not inserted or updated. Processing continues and no error
575** is returned. REPLACE means that preexisting database rows that caused
576** a UNIQUE constraint violation are removed so that the new insert or
577** update can proceed. Processing continues and no error is reported.
drhc2eef3b2002-08-31 18:53:06 +0000578**
579** RESTRICT, SETNULL, and CASCADE actions apply only to foreign keys.
580** RESTRICT is the same as ABORT for IMMEDIATE foreign keys and the
581** same as ROLLBACK for DEFERRED keys. SETNULL means that the foreign
582** key is set to NULL. CASCADE means that a DELETE or UPDATE of the
583** referenced table row is propagated into the row that holds the
584** foreign key.
drh1c928532002-01-31 15:54:21 +0000585**
drh968af522003-02-11 14:55:40 +0000586** The following symbolic values are used to record which type
drh1c928532002-01-31 15:54:21 +0000587** of action to take.
drh9cfcf5d2002-01-29 18:41:24 +0000588*/
drh1c928532002-01-31 15:54:21 +0000589#define OE_None 0 /* There is no constraint to check */
590#define OE_Rollback 1 /* Fail the operation and rollback the transaction */
591#define OE_Abort 2 /* Back out changes but do no rollback transaction */
592#define OE_Fail 3 /* Stop the operation but leave all prior changes */
593#define OE_Ignore 4 /* Ignore the error. Do not do the INSERT or UPDATE */
594#define OE_Replace 5 /* Delete existing record, then do INSERT or UPDATE */
drhc2eef3b2002-08-31 18:53:06 +0000595
596#define OE_Restrict 6 /* OE_Abort for IMMEDIATE, OE_Rollback for DEFERRED */
597#define OE_SetNull 7 /* Set the foreign key value to NULL */
598#define OE_SetDflt 8 /* Set the foreign key value to its default */
599#define OE_Cascade 9 /* Cascade the changes */
600
601#define OE_Default 99 /* Do whatever the default action is */
drh9cfcf5d2002-01-29 18:41:24 +0000602
603/*
drh66b89c82000-11-28 20:47:17 +0000604** Each SQL index is represented in memory by an
drh75897232000-05-29 14:26:00 +0000605** instance of the following structure.
drh967e8b72000-06-21 13:59:10 +0000606**
607** The columns of the table that are to be indexed are described
608** by the aiColumn[] field of this structure. For example, suppose
609** we have the following table and index:
610**
611** CREATE TABLE Ex1(c1 int, c2 int, c3 text);
612** CREATE INDEX Ex2 ON Ex1(c3,c1);
613**
614** In the Table structure describing Ex1, nCol==3 because there are
615** three columns in the table. In the Index structure describing
616** Ex2, nColumn==2 since 2 of the 3 columns of Ex1 are indexed.
617** The value of aiColumn is {2, 0}. aiColumn[0]==2 because the
618** first column to be indexed (c3) has an index of 2 in Ex1.aCol[].
619** The second column to be indexed (c1) has an index of 0 in
620** Ex1.aCol[], hence Ex2.aiColumn[1]==0.
drhea1ba172003-04-20 00:00:23 +0000621**
622** The Index.onError field determines whether or not the indexed columns
623** must be unique and what to do if they are not. When Index.onError=OE_None,
624** it means this is not a unique index. Otherwise it is a unique index
625** and the value of Index.onError indicate the which conflict resolution
626** algorithm to employ whenever an attempt is made to insert a non-unique
627** element.
drh75897232000-05-29 14:26:00 +0000628*/
629struct Index {
drh967e8b72000-06-21 13:59:10 +0000630 char *zName; /* Name of this index */
drh967e8b72000-06-21 13:59:10 +0000631 int nColumn; /* Number of columns in the table used by this index */
632 int *aiColumn; /* Which columns are used by this index. 1st is 0 */
633 Table *pTable; /* The SQL table being indexed */
drhbe0072d2001-09-13 14:46:09 +0000634 int tnum; /* Page containing root of this index in database file */
drh9cfcf5d2002-01-29 18:41:24 +0000635 u8 onError; /* OE_Abort, OE_Ignore, OE_Replace, or OE_None */
drh485b39b2002-07-13 03:11:52 +0000636 u8 autoIndex; /* True if is automatically created (ex: by UNIQUE) */
drhd24cc422003-03-27 12:51:24 +0000637 u8 iDb; /* Index in sqlite.aDb[] of where this index is stored */
drh967e8b72000-06-21 13:59:10 +0000638 Index *pNext; /* The next index associated with the same table */
drh75897232000-05-29 14:26:00 +0000639};
640
641/*
642** Each token coming out of the lexer is an instance of
drh4b59ab52002-08-24 18:24:51 +0000643** this structure. Tokens are also used as part of an expression.
drh4efc4752004-01-16 15:55:37 +0000644**
645** Note if Token.z==0 then Token.dyn and Token.n are undefined and
646** may contain random values. Do not make any assuptions about Token.dyn
647** and Token.n when Token.z==0.
drh75897232000-05-29 14:26:00 +0000648*/
649struct Token {
drh80ff32f2001-11-04 18:32:46 +0000650 const char *z; /* Text of the token. Not NULL-terminated! */
drh4b59ab52002-08-24 18:24:51 +0000651 unsigned dyn : 1; /* True for malloced memory, false for static */
drh6977fea2002-10-22 23:38:04 +0000652 unsigned n : 31; /* Number of characters in this token */
drh75897232000-05-29 14:26:00 +0000653};
654
655/*
656** Each node of an expression in the parse tree is an instance
drh22f70c32002-02-18 01:17:00 +0000657** of this structure.
658**
659** Expr.op is the opcode. The integer parser token codes are reused
660** as opcodes here. For example, the parser defines TK_GE to be an integer
661** code representing the ">=" operator. This same integer code is reused
662** to represent the greater-than-or-equal-to operator in the expression
663** tree.
664**
665** Expr.pRight and Expr.pLeft are subexpressions. Expr.pList is a list
666** of argument if the expression is a function.
667**
drh4b59ab52002-08-24 18:24:51 +0000668** Expr.token is the operator token for this node. For some expressions
669** that have subexpressions, Expr.token can be the complete text that gave
670** rise to the Expr. In the latter case, the token is marked as being
671** a compound token.
drh22f70c32002-02-18 01:17:00 +0000672**
673** An expression of the form ID or ID.ID refers to a column in a table.
674** For such expressions, Expr.op is set to TK_COLUMN and Expr.iTable is
675** the integer cursor number of a VDBE cursor pointing to that table and
676** Expr.iColumn is the column number for the specific column. If the
677** expression is used as a result in an aggregate SELECT, then the
678** value is also stored in the Expr.iAgg column in the aggregate so that
679** it can be accessed after all aggregates are computed.
680**
681** If the expression is a function, the Expr.iTable is an integer code
drh7c972de2003-09-06 22:18:07 +0000682** representing which function. If the expression is an unbound variable
683** marker (a question mark character '?' in the original SQL) then the
684** Expr.iTable holds the index number for that variable.
drh22f70c32002-02-18 01:17:00 +0000685**
686** The Expr.pSelect field points to a SELECT statement. The SELECT might
687** be the right operand of an IN operator. Or, if a scalar SELECT appears
688** in an expression the opcode is TK_SELECT and Expr.pSelect is the only
689** operand.
drh75897232000-05-29 14:26:00 +0000690*/
691struct Expr {
drh1cc093c2002-06-24 22:01:57 +0000692 u8 op; /* Operation performed by this node */
drh8e2ca022002-06-17 17:07:19 +0000693 u8 dataType; /* Either SQLITE_SO_TEXT or SQLITE_SO_NUM */
drhb5a20d32003-04-23 12:25:23 +0000694 u8 iDb; /* Database referenced by this expression */
drhe22a3342003-04-22 20:30:37 +0000695 u8 flags; /* Various flags. See below */
drh75897232000-05-29 14:26:00 +0000696 Expr *pLeft, *pRight; /* Left and right subnodes */
drhd99f7062002-06-08 23:25:08 +0000697 ExprList *pList; /* A list of expressions used as function arguments
698 ** or in "<expr> IN (<expr-list)" */
drh75897232000-05-29 14:26:00 +0000699 Token token; /* An operand token */
drh6977fea2002-10-22 23:38:04 +0000700 Token span; /* Complete text of the expression */
drh967e8b72000-06-21 13:59:10 +0000701 int iTable, iColumn; /* When op==TK_COLUMN, then this expr node means the
drh8e2ca022002-06-17 17:07:19 +0000702 ** iColumn-th field of the iTable-th table. */
drh967e8b72000-06-21 13:59:10 +0000703 int iAgg; /* When op==TK_COLUMN and pParse->useAgg==TRUE, pull
704 ** result from the iAgg-th element of the aggregator */
drhd99f7062002-06-08 23:25:08 +0000705 Select *pSelect; /* When the expression is a sub-select. Also the
706 ** right side of "<expr> IN (<select>)" */
drh75897232000-05-29 14:26:00 +0000707};
708
709/*
drh1f162302002-10-27 19:35:33 +0000710** The following are the meanings of bits in the Expr.flags field.
711*/
712#define EP_FromJoin 0x0001 /* Originated in ON or USING clause of a join */
drh1f162302002-10-27 19:35:33 +0000713
714/*
715** These macros can be used to test, set, or clear bits in the
716** Expr.flags field.
717*/
718#define ExprHasProperty(E,P) (((E)->flags&(P))==(P))
719#define ExprHasAnyProperty(E,P) (((E)->flags&(P))!=0)
720#define ExprSetProperty(E,P) (E)->flags|=(P)
721#define ExprClearProperty(E,P) (E)->flags&=~(P)
722
723/*
drh75897232000-05-29 14:26:00 +0000724** A list of expressions. Each expression may optionally have a
725** name. An expr/name combination can be used in several ways, such
726** as the list of "expr AS ID" fields following a "SELECT" or in the
727** list of "ID = expr" items in an UPDATE. A list of expressions can
drhad3cab52002-05-24 02:04:32 +0000728** also be used as the argument to a function, in which case the a.zName
drh75897232000-05-29 14:26:00 +0000729** field is not used.
730*/
731struct ExprList {
732 int nExpr; /* Number of expressions on the list */
drh4305d102003-07-30 12:34:12 +0000733 int nAlloc; /* Number of entries allocated below */
drh6d4abfb2001-10-22 02:58:08 +0000734 struct ExprList_item {
drh75897232000-05-29 14:26:00 +0000735 Expr *pExpr; /* The list of expressions */
736 char *zName; /* Token associated with this expression */
drh8e2ca022002-06-17 17:07:19 +0000737 u8 sortOrder; /* 1 for DESC or 0 for ASC */
738 u8 isAgg; /* True if this is an aggregate like count(*) */
739 u8 done; /* A flag to indicate when processing is finished */
drh75897232000-05-29 14:26:00 +0000740 } *a; /* One entry for each expression */
741};
742
743/*
drhad3cab52002-05-24 02:04:32 +0000744** An instance of this structure can hold a simple list of identifiers,
745** such as the list "a,b,c" in the following statements:
746**
747** INSERT INTO t(a,b,c) VALUES ...;
748** CREATE INDEX idx ON t(a,b,c);
749** CREATE TRIGGER trig BEFORE UPDATE ON t(a,b,c) ...;
750**
751** The IdList.a.idx field is used when the IdList represents the list of
752** column names after a table name in an INSERT statement. In the statement
753**
754** INSERT INTO t(a,b,c) ...
755**
756** If "a" is the k-th column of table "t", then IdList.a[0].idx==k.
drh75897232000-05-29 14:26:00 +0000757*/
758struct IdList {
759 int nId; /* Number of identifiers on the list */
drh4305d102003-07-30 12:34:12 +0000760 int nAlloc; /* Number of entries allocated for a[] below */
drh6d4abfb2001-10-22 02:58:08 +0000761 struct IdList_item {
drhad3cab52002-05-24 02:04:32 +0000762 char *zName; /* Name of the identifier */
drh967e8b72000-06-21 13:59:10 +0000763 int idx; /* Index in some Table.aCol[] of a column named zName */
drhad3cab52002-05-24 02:04:32 +0000764 } *a;
765};
766
767/*
768** The following structure describes the FROM clause of a SELECT statement.
769** Each table or subquery in the FROM clause is a separate element of
770** the SrcList.a[] array.
drhd24cc422003-03-27 12:51:24 +0000771**
772** With the addition of multiple database support, the following structure
773** can also be used to describe a particular table such as the table that
774** is modified by an INSERT, DELETE, or UPDATE statement. In standard SQL,
775** such a table must be a simple name: ID. But in SQLite, the table can
776** now be identified by a database name, a dot, then the table name: ID.ID.
drhad3cab52002-05-24 02:04:32 +0000777*/
778struct SrcList {
drh4305d102003-07-30 12:34:12 +0000779 u16 nSrc; /* Number of tables or subqueries in the FROM clause */
780 u16 nAlloc; /* Number of entries allocated in a[] below */
drhad3cab52002-05-24 02:04:32 +0000781 struct SrcList_item {
drh113088e2003-03-20 01:16:58 +0000782 char *zDatabase; /* Name of database holding this table */
drhad3cab52002-05-24 02:04:32 +0000783 char *zName; /* Name of the table */
784 char *zAlias; /* The "B" part of a "A AS B" phrase. zName is the "A" */
drhdaffd0e2001-04-11 14:28:42 +0000785 Table *pTab; /* An SQL table corresponding to zName */
786 Select *pSelect; /* A SELECT statement used in place of a table name */
drhad3cab52002-05-24 02:04:32 +0000787 int jointype; /* Type of join between this table and the next */
drh63eb5f22003-04-29 16:20:44 +0000788 int iCursor; /* The VDBE cursor number used to access this table */
drhad3cab52002-05-24 02:04:32 +0000789 Expr *pOn; /* The ON clause of a join */
790 IdList *pUsing; /* The USING clause of a join */
drh113088e2003-03-20 01:16:58 +0000791 } a[1]; /* One entry for each identifier on the list */
drh75897232000-05-29 14:26:00 +0000792};
793
794/*
drh01f3f252002-05-24 16:14:15 +0000795** Permitted values of the SrcList.a.jointype field
796*/
797#define JT_INNER 0x0001 /* Any kind of inner or cross join */
798#define JT_NATURAL 0x0002 /* True for a "natural" join */
drh195e6962002-05-25 00:18:20 +0000799#define JT_LEFT 0x0004 /* Left outer join */
800#define JT_RIGHT 0x0008 /* Right outer join */
drh01f3f252002-05-24 16:14:15 +0000801#define JT_OUTER 0x0010 /* The "OUTER" keyword is present */
802#define JT_ERROR 0x0020 /* unknown or unsupported join type */
803
804/*
drh6b563442001-11-07 16:48:26 +0000805** For each nested loop in a WHERE clause implementation, the WhereInfo
806** structure contains a single instance of this structure. This structure
807** is intended to be private the the where.c module and should not be
808** access or modified by other modules.
809*/
810struct WhereLevel {
811 int iMem; /* Memory cell used by this level */
812 Index *pIdx; /* Index used */
813 int iCur; /* Cursor number used for this index */
drh487ab3c2001-11-08 00:45:21 +0000814 int score; /* How well this indexed scored */
drh6b563442001-11-07 16:48:26 +0000815 int brk; /* Jump here to break out of the loop */
816 int cont; /* Jump here to continue with the next loop cycle */
817 int op, p1, p2; /* Opcode used to terminate the loop */
drhad2d8302002-05-24 20:31:36 +0000818 int iLeftJoin; /* Memory cell used to implement LEFT OUTER JOIN */
819 int top; /* First instruction of interior of the loop */
drhd99f7062002-06-08 23:25:08 +0000820 int inOp, inP1, inP2;/* Opcode used to implement an IN operator */
drhc045ec52002-12-04 20:01:06 +0000821 int bRev; /* Do the scan in the reverse direction */
drh6b563442001-11-07 16:48:26 +0000822};
823
824/*
drh75897232000-05-29 14:26:00 +0000825** The WHERE clause processing routine has two halves. The
826** first part does the start of the WHERE loop and the second
827** half does the tail of the WHERE loop. An instance of
828** this structure is returned by the first half and passed
829** into the second half to give some continuity.
830*/
831struct WhereInfo {
832 Parse *pParse;
drhad3cab52002-05-24 02:04:32 +0000833 SrcList *pTabList; /* List of tables in the join */
drh19a775c2000-06-05 18:54:46 +0000834 int iContinue; /* Jump here to continue with next record */
835 int iBreak; /* Jump here to break out of the loop */
drh6b563442001-11-07 16:48:26 +0000836 int nLevel; /* Number of nested loop */
drh832508b2002-03-02 17:04:07 +0000837 int savedNTab; /* Value of pParse->nTab before WhereBegin() */
838 int peakNTab; /* Value of pParse->nTab after WhereBegin() */
drh6b563442001-11-07 16:48:26 +0000839 WhereLevel a[1]; /* Information about each nest loop in the WHERE */
drh75897232000-05-29 14:26:00 +0000840};
841
842/*
drh9bb61fe2000-06-05 16:01:39 +0000843** An instance of the following structure contains all information
844** needed to generate code for a single SELECT statement.
drha76b5df2002-02-23 02:32:10 +0000845**
846** The zSelect field is used when the Select structure must be persistent.
847** Normally, the expression tree points to tokens in the original input
848** string that encodes the select. But if the Select structure must live
849** longer than its input string (for example when it is used to describe
850** a VIEW) we have to make a copy of the input string so that the nodes
851** of the expression tree will have something to point to. zSelect is used
852** to hold that copy.
drhd11d3822002-06-21 23:01:49 +0000853**
854** nLimit is set to -1 if there is no LIMIT clause. nOffset is set to 0.
855** If there is a LIMIT clause, the parser sets nLimit to the value of the
856** limit and nOffset to the value of the offset (or 0 if there is not
857** offset). But later on, nLimit and nOffset become the memory locations
858** in the VDBE that record the limit and offset counters.
drh9bb61fe2000-06-05 16:01:39 +0000859*/
860struct Select {
drh9bb61fe2000-06-05 16:01:39 +0000861 ExprList *pEList; /* The fields of the result */
drh7b58dae2003-07-20 01:16:46 +0000862 u8 op; /* One of: TK_UNION TK_ALL TK_INTERSECT TK_EXCEPT */
863 u8 isDistinct; /* True if the DISTINCT keyword is present */
drhad3cab52002-05-24 02:04:32 +0000864 SrcList *pSrc; /* The FROM clause */
drh9bb61fe2000-06-05 16:01:39 +0000865 Expr *pWhere; /* The WHERE clause */
866 ExprList *pGroupBy; /* The GROUP BY clause */
867 Expr *pHaving; /* The HAVING clause */
868 ExprList *pOrderBy; /* The ORDER BY clause */
drh967e8b72000-06-21 13:59:10 +0000869 Select *pPrior; /* Prior select in a compound select statement */
drh9bbca4c2001-11-06 04:00:18 +0000870 int nLimit, nOffset; /* LIMIT and OFFSET values. -1 means not used */
drh7b58dae2003-07-20 01:16:46 +0000871 int iLimit, iOffset; /* Memory registers holding LIMIT & OFFSET counters */
drha76b5df2002-02-23 02:32:10 +0000872 char *zSelect; /* Complete text of the SELECT command */
drh9bb61fe2000-06-05 16:01:39 +0000873};
874
875/*
drhfef52082000-06-06 01:50:43 +0000876** The results of a select can be distributed in several ways.
877*/
878#define SRT_Callback 1 /* Invoke a callback with each row of result */
879#define SRT_Mem 2 /* Store result in a memory cell */
drh82c3d632000-06-06 21:56:07 +0000880#define SRT_Set 3 /* Store result as unique keys in a table */
881#define SRT_Union 5 /* Store result as keys in a table */
882#define SRT_Except 6 /* Remove result from a UNION table */
drh5974a302000-06-07 14:42:26 +0000883#define SRT_Table 7 /* Store result as data with a unique key */
drh2d0794e2002-03-03 03:03:52 +0000884#define SRT_TempTable 8 /* Store result in a trasient table */
drhd7489c32002-05-27 12:24:48 +0000885#define SRT_Discard 9 /* Do not save the results anywhere */
drhf46f9052002-06-22 02:33:38 +0000886#define SRT_Sorter 10 /* Store results in the sorter */
drh142e30d2002-08-28 03:00:58 +0000887#define SRT_Subroutine 11 /* Call a subroutine to handle results */
drhfef52082000-06-06 01:50:43 +0000888
889/*
drh22827922000-06-06 17:27:05 +0000890** When a SELECT uses aggregate functions (like "count(*)" or "avg(f1)")
891** we have to do some additional analysis of expressions. An instance
892** of the following structure holds information about a single subexpression
893** somewhere in the SELECT statement. An array of these structures holds
894** all the information we need to generate code for aggregate
895** expressions.
896**
897** Note that when analyzing a SELECT containing aggregates, both
898** non-aggregate field variables and aggregate functions are stored
899** in the AggExpr array of the Parser structure.
900**
901** The pExpr field points to an expression that is part of either the
902** field list, the GROUP BY clause, the HAVING clause or the ORDER BY
903** clause. The expression will be freed when those clauses are cleaned
904** up. Do not try to delete the expression attached to AggExpr.pExpr.
905**
906** If AggExpr.pExpr==0, that means the expression is "count(*)".
907*/
908struct AggExpr {
909 int isAgg; /* if TRUE contains an aggregate function */
910 Expr *pExpr; /* The expression */
drh0bce8352002-02-28 00:41:10 +0000911 FuncDef *pFunc; /* Information about the aggregate function */
drh22827922000-06-06 17:27:05 +0000912};
913
914/*
drhf57b3392001-10-08 13:22:32 +0000915** An SQL parser context. A copy of this structure is passed through
916** the parser and down into all the parser action routine in order to
917** carry around information that is global to the entire parse.
drh75897232000-05-29 14:26:00 +0000918*/
919struct Parse {
920 sqlite *db; /* The main database structure */
drh4c504392000-10-16 22:06:40 +0000921 int rc; /* Return code from execution */
drh75897232000-05-29 14:26:00 +0000922 char *zErrMsg; /* An error message */
923 Token sErrToken; /* The token at which the error occurred */
924 Token sFirstToken; /* The first token parsed */
925 Token sLastToken; /* The last token parsed */
drh326dce72003-01-29 14:06:07 +0000926 const char *zTail; /* All SQL text past the last semicolon parsed */
drh75897232000-05-29 14:26:00 +0000927 Table *pNewTable; /* A table being constructed by CREATE TABLE */
928 Vdbe *pVdbe; /* An engine for executing database bytecode */
drh836faa42003-01-11 13:30:57 +0000929 u8 colNamesSet; /* TRUE after OP_ColumnName has been issued to pVdbe */
drhe0bc4042002-06-25 01:09:11 +0000930 u8 explain; /* True if the EXPLAIN flag is found on the query */
drhe0bc4042002-06-25 01:09:11 +0000931 u8 nameClash; /* A permanent table name clashes with temp table name */
932 u8 useAgg; /* If true, extract field values from the aggregator
933 ** while generating expressions. Normally false */
drh75897232000-05-29 14:26:00 +0000934 int nErr; /* Number of errors seen */
drh832508b2002-03-02 17:04:07 +0000935 int nTab; /* Number of previously allocated VDBE cursors */
drh19a775c2000-06-05 18:54:46 +0000936 int nMem; /* Number of memory cells used so far */
drhfef52082000-06-06 01:50:43 +0000937 int nSet; /* Number of sets used so far */
drh22827922000-06-06 17:27:05 +0000938 int nAgg; /* Number of aggregate expressions */
drh7c972de2003-09-06 22:18:07 +0000939 int nVar; /* Number of '?' variables seen in the SQL so far */
drh22827922000-06-06 17:27:05 +0000940 AggExpr *aAgg; /* An array of aggregate expressions */
drh5cf590c2003-04-24 01:45:04 +0000941 const char *zAuthContext; /* The 6th parameter to db->xAuth callbacks */
drhf0f258b2003-04-21 18:48:45 +0000942 Trigger *pNewTrigger; /* Trigger under construct by a CREATE TRIGGER */
943 TriggerStack *trigStack; /* Trigger actions being coded */
drh75897232000-05-29 14:26:00 +0000944};
945
danielk1977d99bc932002-05-16 00:13:12 +0000946/*
drh85e20962003-04-25 17:52:11 +0000947** An instance of the following structure can be declared on a stack and used
948** to save the Parse.zAuthContext value so that it can be restored later.
949*/
950struct AuthContext {
951 const char *zAuthContext; /* Put saved Parse.zAuthContext here */
952 Parse *pParse; /* The Parse structure */
953};
954
955/*
rdcb0c374f2004-02-20 22:53:38 +0000956** Bitfield flags for P2 value in OP_PutIntKey and OP_Delete
957*/
958#define OPFLAG_NCHANGE 1 /* Set to update db->nChange */
959#define OPFLAG_LASTROWID 2 /* Set to update db->lastRowid */
960#define OPFLAG_CSCHANGE 4 /* Set to update db->csChange */
961
962/*
danielk1977d99bc932002-05-16 00:13:12 +0000963 * Each trigger present in the database schema is stored as an instance of
964 * struct Trigger.
965 *
966 * Pointers to instances of struct Trigger are stored in two ways.
967 * 1. In the "trigHash" hash table (part of the sqlite* that represents the
968 * database). This allows Trigger structures to be retrieved by name.
969 * 2. All triggers associated with a single table form a linked list, using the
drhad3cab52002-05-24 02:04:32 +0000970 * pNext member of struct Trigger. A pointer to the first element of the
971 * linked list is stored as the "pTrigger" member of the associated
972 * struct Table.
danielk1977d99bc932002-05-16 00:13:12 +0000973 *
drhad3cab52002-05-24 02:04:32 +0000974 * The "step_list" member points to the first element of a linked list
975 * containing the SQL statements specified as the trigger program.
danielk1977d99bc932002-05-16 00:13:12 +0000976 */
danielk1977c3f9bad2002-05-15 08:30:12 +0000977struct Trigger {
drhdc379452002-05-15 12:45:43 +0000978 char *name; /* The name of the trigger */
979 char *table; /* The table or view to which the trigger applies */
drhf0f258b2003-04-21 18:48:45 +0000980 u8 iDb; /* Database containing this trigger */
drh79a519c2003-05-17 19:04:03 +0000981 u8 iTabDb; /* Database containing Trigger.table */
drhf0f258b2003-04-21 18:48:45 +0000982 u8 op; /* One of TK_DELETE, TK_UPDATE, TK_INSERT */
983 u8 tr_tm; /* One of TK_BEFORE, TK_AFTER */
drhdc379452002-05-15 12:45:43 +0000984 Expr *pWhen; /* The WHEN clause of the expresion (may be NULL) */
985 IdList *pColumns; /* If this is an UPDATE OF <column-list> trigger,
danielk1977d99bc932002-05-16 00:13:12 +0000986 the <column-list> is stored here */
drhdc379452002-05-15 12:45:43 +0000987 int foreach; /* One of TK_ROW or TK_STATEMENT */
drh4312db52003-06-03 01:47:11 +0000988 Token nameToken; /* Token containing zName. Use during parsing only */
danielk1977c3f9bad2002-05-15 08:30:12 +0000989
drhdc379452002-05-15 12:45:43 +0000990 TriggerStep *step_list; /* Link list of trigger program steps */
drhdc379452002-05-15 12:45:43 +0000991 Trigger *pNext; /* Next trigger associated with the table */
danielk1977c3f9bad2002-05-15 08:30:12 +0000992};
993
danielk1977d99bc932002-05-16 00:13:12 +0000994/*
995 * An instance of struct TriggerStep is used to store a single SQL statement
996 * that is a part of a trigger-program.
997 *
998 * Instances of struct TriggerStep are stored in a singly linked list (linked
999 * using the "pNext" member) referenced by the "step_list" member of the
1000 * associated struct Trigger instance. The first element of the linked list is
1001 * the first step of the trigger-program.
1002 *
1003 * The "op" member indicates whether this is a "DELETE", "INSERT", "UPDATE" or
1004 * "SELECT" statement. The meanings of the other members is determined by the
1005 * value of "op" as follows:
1006 *
1007 * (op == TK_INSERT)
1008 * orconf -> stores the ON CONFLICT algorithm
1009 * pSelect -> If this is an INSERT INTO ... SELECT ... statement, then
1010 * this stores a pointer to the SELECT statement. Otherwise NULL.
1011 * target -> A token holding the name of the table to insert into.
1012 * pExprList -> If this is an INSERT INTO ... VALUES ... statement, then
1013 * this stores values to be inserted. Otherwise NULL.
1014 * pIdList -> If this is an INSERT INTO ... (<column-names>) VALUES ...
drhad3cab52002-05-24 02:04:32 +00001015 * statement, then this stores the column-names to be
1016 * inserted into.
danielk1977d99bc932002-05-16 00:13:12 +00001017 *
1018 * (op == TK_DELETE)
1019 * target -> A token holding the name of the table to delete from.
1020 * pWhere -> The WHERE clause of the DELETE statement if one is specified.
1021 * Otherwise NULL.
1022 *
1023 * (op == TK_UPDATE)
1024 * target -> A token holding the name of the table to update rows of.
1025 * pWhere -> The WHERE clause of the UPDATE statement if one is specified.
1026 * Otherwise NULL.
1027 * pExprList -> A list of the columns to update and the expressions to update
danielk19774adee202004-05-08 08:23:19 +00001028 * them to. See sqlite3Update() documentation of "pChanges"
drhad3cab52002-05-24 02:04:32 +00001029 * argument.
danielk1977d99bc932002-05-16 00:13:12 +00001030 *
1031 */
1032struct TriggerStep {
1033 int op; /* One of TK_DELETE, TK_UPDATE, TK_INSERT, TK_SELECT */
1034 int orconf; /* OE_Rollback etc. */
drha69d9162003-04-17 22:57:53 +00001035 Trigger *pTrig; /* The trigger that this step is a part of */
danielk1977c3f9bad2002-05-15 08:30:12 +00001036
danielk1977d99bc932002-05-16 00:13:12 +00001037 Select *pSelect; /* Valid for SELECT and sometimes
1038 INSERT steps (when pExprList == 0) */
1039 Token target; /* Valid for DELETE, UPDATE, INSERT steps */
1040 Expr *pWhere; /* Valid for DELETE, UPDATE steps */
1041 ExprList *pExprList; /* Valid for UPDATE statements and sometimes
1042 INSERT steps (when pSelect == 0) */
1043 IdList *pIdList; /* Valid for INSERT statements only */
1044
1045 TriggerStep * pNext; /* Next in the link-list */
1046};
1047
1048/*
1049 * An instance of struct TriggerStack stores information required during code
1050 * generation of a single trigger program. While the trigger program is being
1051 * coded, its associated TriggerStack instance is pointed to by the
1052 * "pTriggerStack" member of the Parse structure.
1053 *
1054 * The pTab member points to the table that triggers are being coded on. The
1055 * newIdx member contains the index of the vdbe cursor that points at the temp
1056 * table that stores the new.* references. If new.* references are not valid
1057 * for the trigger being coded (for example an ON DELETE trigger), then newIdx
1058 * is set to -1. The oldIdx member is analogous to newIdx, for old.* references.
1059 *
1060 * The ON CONFLICT policy to be used for the trigger program steps is stored
1061 * as the orconf member. If this is OE_Default, then the ON CONFLICT clause
1062 * specified for individual triggers steps is used.
1063 *
1064 * struct TriggerStack has a "pNext" member, to allow linked lists to be
1065 * constructed. When coding nested triggers (triggers fired by other triggers)
1066 * each nested trigger stores its parent trigger's TriggerStack as the "pNext"
1067 * pointer. Once the nested trigger has been coded, the pNext value is restored
1068 * to the pTriggerStack member of the Parse stucture and coding of the parent
1069 * trigger continues.
1070 *
1071 * Before a nested trigger is coded, the linked list pointed to by the
1072 * pTriggerStack is scanned to ensure that the trigger is not about to be coded
1073 * recursively. If this condition is detected, the nested trigger is not coded.
1074 */
1075struct TriggerStack {
1076 Table *pTab; /* Table that triggers are currently being coded on */
1077 int newIdx; /* Index of vdbe cursor to "new" temp table */
1078 int oldIdx; /* Index of vdbe cursor to "old" temp table */
1079 int orconf; /* Current orconf policy */
danielk19776f349032002-06-11 02:25:40 +00001080 int ignoreJump; /* where to jump to for a RAISE(IGNORE) */
drhe22a3342003-04-22 20:30:37 +00001081 Trigger *pTrigger; /* The trigger currently being coded */
1082 TriggerStack *pNext; /* Next trigger down on the trigger stack */
danielk1977d99bc932002-05-16 00:13:12 +00001083};
1084
1085/*
drhf26e09c2003-05-31 16:21:12 +00001086** The following structure contains information used by the sqliteFix...
1087** routines as they walk the parse tree to make database references
1088** explicit.
1089*/
1090typedef struct DbFixer DbFixer;
1091struct DbFixer {
1092 Parse *pParse; /* The parsing context. Error messages written here */
1093 const char *zDb; /* Make sure all objects are contained in this database */
1094 const char *zType; /* Type of the container - used for error messages */
1095 const Token *pName; /* Name of the container - used for error messages */
1096};
1097
1098/*
danielk1977d99bc932002-05-16 00:13:12 +00001099 * This global flag is set for performance testing of triggers. When it is set
1100 * SQLite will perform the overhead of building new and old trigger references
1101 * even when no triggers exist
1102 */
1103extern int always_code_trigger_setup;
danielk1977c3f9bad2002-05-15 08:30:12 +00001104
drh75897232000-05-29 14:26:00 +00001105/*
1106** Internal function prototypes
1107*/
danielk19774adee202004-05-08 08:23:19 +00001108int sqlite3StrICmp(const char *, const char *);
1109int sqlite3StrNICmp(const char *, const char *, int);
1110int sqlite3HashNoCase(const char *, int);
1111int sqlite3IsNumber(const char*);
1112int sqlite3Compare(const char *, const char *);
1113int sqlite3SortCompare(const char *, const char *);
1114void sqlite3RealToSortable(double r, char *);
drhdcc581c2000-05-30 13:44:19 +00001115#ifdef MEMORY_DEBUG
danielk19774adee202004-05-08 08:23:19 +00001116 void *sqlite3Malloc_(int,int,char*,int);
1117 void sqlite3Free_(void*,char*,int);
1118 void *sqlite3Realloc_(void*,int,char*,int);
1119 char *sqlite3StrDup_(const char*,char*,int);
1120 char *sqlite3StrNDup_(const char*, int,char*,int);
1121 void sqlite3CheckMemory(void*,int);
drhdcc581c2000-05-30 13:44:19 +00001122#else
1123 void *sqliteMalloc(int);
drh8c1238a2003-01-02 14:43:55 +00001124 void *sqliteMallocRaw(int);
drhdcc581c2000-05-30 13:44:19 +00001125 void sqliteFree(void*);
1126 void *sqliteRealloc(void*,int);
drh6e142f52000-06-08 13:36:40 +00001127 char *sqliteStrDup(const char*);
1128 char *sqliteStrNDup(const char*, int);
danielk19774adee202004-05-08 08:23:19 +00001129# define sqlite3CheckMemory(a,b)
drhdcc581c2000-05-30 13:44:19 +00001130#endif
danielk19774adee202004-05-08 08:23:19 +00001131char *sqlite3MPrintf(const char*, ...);
1132char *sqlite3VMPrintf(const char*, va_list);
1133void sqlite3SetString(char **, const char *, ...);
1134void sqlite3SetNString(char **, ...);
1135void sqlite3ErrorMsg(Parse*, const char*, ...);
1136void sqlite3Dequote(char*);
1137int sqlite3KeywordCode(const char*, int);
1138int sqlite3RunParser(Parse*, const char*, char **);
1139void sqlite3Exec(Parse*);
1140Expr *sqlite3Expr(int, Expr*, Expr*, Token*);
1141void sqlite3ExprSpan(Expr*,Token*,Token*);
1142Expr *sqlite3ExprFunction(ExprList*, Token*);
1143void sqlite3ExprDelete(Expr*);
1144ExprList *sqlite3ExprListAppend(ExprList*,Expr*,Token*);
1145void sqlite3ExprListDelete(ExprList*);
1146int sqlite3Init(sqlite*, char**);
1147void sqlite3Pragma(Parse*,Token*,Token*,int);
1148void sqlite3ResetInternalSchema(sqlite*, int);
1149void sqlite3BeginParse(Parse*,int);
1150void sqlite3RollbackInternalChanges(sqlite*);
1151void sqlite3CommitInternalChanges(sqlite*);
1152Table *sqlite3ResultSetOfSelect(Parse*,char*,Select*);
1153void sqlite3OpenMasterTable(Vdbe *v, int);
1154void sqlite3StartTable(Parse*,Token*,Token*,int,int);
1155void sqlite3AddColumn(Parse*,Token*);
1156void sqlite3AddNotNull(Parse*, int);
1157void sqlite3AddPrimaryKey(Parse*, IdList*, int);
1158void sqlite3AddColumnType(Parse*,Token*,Token*);
1159void sqlite3AddDefaultValue(Parse*,Token*,int);
1160int sqlite3CollateType(const char*, int);
1161void sqlite3AddCollateType(Parse*, int);
1162void sqlite3EndTable(Parse*,Token*,Select*);
1163void sqlite3CreateView(Parse*,Token*,Token*,Select*,int);
1164int sqlite3ViewGetColumnNames(Parse*,Table*);
1165void sqlite3DropTable(Parse*, Token*, int);
1166void sqlite3DeleteTable(sqlite*, Table*);
1167void sqlite3Insert(Parse*, SrcList*, ExprList*, Select*, IdList*, int);
1168IdList *sqlite3IdListAppend(IdList*, Token*);
1169int sqlite3IdListIndex(IdList*,const char*);
1170SrcList *sqlite3SrcListAppend(SrcList*, Token*, Token*);
1171void sqlite3SrcListAddAlias(SrcList*, Token*);
1172void sqlite3SrcListAssignCursors(Parse*, SrcList*);
1173void sqlite3IdListDelete(IdList*);
1174void sqlite3SrcListDelete(SrcList*);
1175void sqlite3CreateIndex(Parse*,Token*,SrcList*,IdList*,int,Token*,Token*);
1176void sqlite3DropIndex(Parse*, SrcList*);
1177void sqlite3AddKeyType(Vdbe*, ExprList*);
1178void sqlite3AddIdxKeyType(Vdbe*, Index*);
1179int sqlite3Select(Parse*, Select*, int, int, Select*, int, int*);
1180Select *sqlite3SelectNew(ExprList*,SrcList*,Expr*,ExprList*,Expr*,ExprList*,
drh9bbca4c2001-11-06 04:00:18 +00001181 int,int,int);
danielk19774adee202004-05-08 08:23:19 +00001182void sqlite3SelectDelete(Select*);
1183void sqlite3SelectUnbind(Select*);
1184Table *sqlite3SrcListLookup(Parse*, SrcList*);
1185int sqlite3IsReadOnly(Parse*, Table*, int);
1186void sqlite3DeleteFrom(Parse*, SrcList*, Expr*);
1187void sqlite3Update(Parse*, SrcList*, ExprList*, Expr*, int);
1188WhereInfo *sqlite3WhereBegin(Parse*, SrcList*, Expr*, int, ExprList**);
1189void sqlite3WhereEnd(WhereInfo*);
1190void sqlite3ExprCode(Parse*, Expr*);
1191int sqlite3ExprCodeExprList(Parse*, ExprList*, int);
1192void sqlite3ExprIfTrue(Parse*, Expr*, int, int);
1193void sqlite3ExprIfFalse(Parse*, Expr*, int, int);
1194Table *sqlite3FindTable(sqlite*,const char*, const char*);
1195Table *sqlite3LocateTable(Parse*,const char*, const char*);
1196Index *sqlite3FindIndex(sqlite*,const char*, const char*);
1197void sqlite3UnlinkAndDeleteIndex(sqlite*,Index*);
1198void sqlite3Copy(Parse*, SrcList*, Token*, Token*, int);
1199void sqlite3Vacuum(Parse*, Token*);
1200int sqlite3RunVacuum(char**, sqlite*);
1201int sqlite3GlobCompare(const unsigned char*,const unsigned char*);
1202int sqlite3LikeCompare(const unsigned char*,const unsigned char*);
1203char *sqlite3TableNameFromToken(Token*);
1204int sqlite3ExprCheck(Parse*, Expr*, int, int*);
1205int sqlite3ExprType(Expr*);
1206int sqlite3ExprCompare(Expr*, Expr*);
drhcce7d172000-05-31 15:34:51 +00001207int sqliteFuncId(Token*);
danielk19774adee202004-05-08 08:23:19 +00001208int sqlite3ExprResolveIds(Parse*, SrcList*, ExprList*, Expr*);
1209int sqlite3ExprAnalyzeAggregates(Parse*, Expr*);
1210Vdbe *sqlite3GetVdbe(Parse*);
1211void sqlite3Randomness(int, void*);
1212void sqlite3RollbackAll(sqlite*);
1213void sqlite3CodeVerifySchema(Parse*, int);
1214void sqlite3BeginTransaction(Parse*, int);
1215void sqlite3CommitTransaction(Parse*);
1216void sqlite3RollbackTransaction(Parse*);
1217int sqlite3ExprIsConstant(Expr*);
1218int sqlite3ExprIsInteger(Expr*, int*);
1219int sqlite3IsRowid(const char*);
1220void sqlite3GenerateRowDelete(sqlite*, Vdbe*, Table*, int, int);
1221void sqlite3GenerateRowIndexDelete(sqlite*, Vdbe*, Table*, int, char*);
1222void sqlite3GenerateConstraintChecks(Parse*,Table*,int,char*,int,int,int,int);
1223void sqlite3CompleteInsertion(Parse*, Table*, int, char*, int, int, int);
1224int sqlite3OpenTableAndIndices(Parse*, Table*, int);
1225void sqlite3BeginWriteOperation(Parse*, int, int);
1226void sqlite3EndWriteOperation(Parse*);
1227Expr *sqlite3ExprDup(Expr*);
1228void sqlite3TokenCopy(Token*, Token*);
1229ExprList *sqlite3ExprListDup(ExprList*);
1230SrcList *sqlite3SrcListDup(SrcList*);
1231IdList *sqlite3IdListDup(IdList*);
1232Select *sqlite3SelectDup(Select*);
1233FuncDef *sqlite3FindFunction(sqlite*,const char*,int,int,int);
1234void sqlite3RegisterBuiltinFunctions(sqlite*);
1235void sqlite3RegisterDateTimeFunctions(sqlite*);
1236int sqlite3SafetyOn(sqlite*);
1237int sqlite3SafetyOff(sqlite*);
1238int sqlite3SafetyCheck(sqlite*);
1239void sqlite3ChangeCookie(sqlite*, Vdbe*);
1240void sqlite3BeginTrigger(Parse*, Token*,int,int,IdList*,SrcList*,int,Expr*,int);
1241void sqlite3FinishTrigger(Parse*, TriggerStep*, Token*);
1242void sqlite3DropTrigger(Parse*, SrcList*);
1243void sqlite3DropTriggerPtr(Parse*, Trigger*, int);
1244int sqlite3TriggersExist(Parse* , Trigger* , int , int , int, ExprList*);
1245int sqlite3CodeRowTrigger(Parse*, int, ExprList*, int, Table *, int, int,
danielk19776f349032002-06-11 02:25:40 +00001246 int, int);
drhdc379452002-05-15 12:45:43 +00001247void sqliteViewTriggers(Parse*, Table*, Expr*, int, ExprList*);
danielk19774adee202004-05-08 08:23:19 +00001248void sqlite3DeleteTriggerStep(TriggerStep*);
1249TriggerStep *sqlite3TriggerSelectStep(Select*);
1250TriggerStep *sqlite3TriggerInsertStep(Token*, IdList*, ExprList*, Select*, int);
1251TriggerStep *sqlite3TriggerUpdateStep(Token*, ExprList*, Expr*, int);
1252TriggerStep *sqlite3TriggerDeleteStep(Token*, Expr*);
1253void sqlite3DeleteTrigger(Trigger*);
1254int sqlite3JoinType(Parse*, Token*, Token*, Token*);
1255void sqlite3CreateForeignKey(Parse*, IdList*, Token*, IdList*, int);
1256void sqlite3DeferForeignKey(Parse*, int);
drhed6c8672003-01-12 18:02:16 +00001257#ifndef SQLITE_OMIT_AUTHORIZATION
danielk19774adee202004-05-08 08:23:19 +00001258 void sqlite3AuthRead(Parse*,Expr*,SrcList*);
1259 int sqlite3AuthCheck(Parse*,int, const char*, const char*, const char*);
1260 void sqlite3AuthContextPush(Parse*, AuthContext*, const char*);
1261 void sqlite3AuthContextPop(AuthContext*);
drhed6c8672003-01-12 18:02:16 +00001262#else
danielk19774adee202004-05-08 08:23:19 +00001263# define sqlite3AuthRead(a,b,c)
1264# define sqlite3AuthCheck(a,b,c,d,e) SQLITE_OK
1265# define sqlite3AuthContextPush(a,b,c)
1266# define sqlite3AuthContextPop(a) ((void)(a))
drhed6c8672003-01-12 18:02:16 +00001267#endif
danielk19774adee202004-05-08 08:23:19 +00001268void sqlite3Attach(Parse*, Token*, Token*, Token*);
1269void sqlite3Detach(Parse*, Token*);
1270int sqlite3BtreeFactory(const sqlite *db, const char *zFilename,
drhbb07e9a2003-04-16 02:17:35 +00001271 int mode, int nPg, Btree **ppBtree);
danielk19774adee202004-05-08 08:23:19 +00001272int sqlite3FixInit(DbFixer*, Parse*, int, const char*, const Token*);
1273int sqlite3FixSrcList(DbFixer*, SrcList*);
1274int sqlite3FixSelect(DbFixer*, Select*);
1275int sqlite3FixExpr(DbFixer*, Expr*);
1276int sqlite3FixExprList(DbFixer*, ExprList*);
1277int sqlite3FixTriggerStep(DbFixer*, TriggerStep*);
1278double sqlite3AtoF(const char *z, const char **);
drh5f968432004-02-21 19:02:30 +00001279char *sqlite_snprintf(int,char*,const char*,...);
danielk19774adee202004-05-08 08:23:19 +00001280int sqlite3FitsIn32Bits(const char *);
danielk1977998b56c2004-05-06 23:37:52 +00001281
1282unsigned char *sqlite3utf16to8(const void *pData, int N);
1283void *sqlite3utf8to16be(const unsigned char *pIn, int N);
1284void *sqlite3utf8to16le(const unsigned char *pIn, int N);
1285void sqlite3utf16to16le(void *pData, int N);
1286void sqlite3utf16to16be(void *pData, int N);
danielk1977192ac1d2004-05-10 07:17:30 +00001287int sqlite3PutVarint(unsigned char *, u64);
danielk197790e4d952004-05-10 10:05:53 +00001288int sqlite3GetVarint(const unsigned char *, u64 *);
danielk1977192ac1d2004-05-10 07:17:30 +00001289int sqlite3VarintLen(u64 v);
danielk19774adee202004-05-08 08:23:19 +00001290