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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**
danielk1977ef2cb632004-05-29 02:37:19 +000014** @(#) $Id: sqliteInt.h,v 1.261 2004/05/29 02:37:19 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
drhf328bc82004-05-10 23:29:49 +0000123typedef INT64_TYPE i64; /* 8-byte signed integer */
drh3aac2dd2004-04-26 14:10:20 +0000124typedef UINT64_TYPE u64; /* 8-byte unsigned integer */
drh5a2c2c22001-11-21 02:21:11 +0000125typedef UINT32_TYPE u32; /* 4-byte unsigned integer */
126typedef UINT16_TYPE u16; /* 2-byte unsigned integer */
127typedef UINT8_TYPE u8; /* 1-byte unsigned integer */
drh905793e2004-02-21 13:31:09 +0000128typedef UINT8_TYPE i8; /* 1-byte signed integer */
drh5a2c2c22001-11-21 02:21:11 +0000129typedef INTPTR_TYPE ptr; /* Big enough to hold a pointer */
130typedef unsigned INTPTR_TYPE uptr; /* Big enough to hold a pointer */
131
132/*
drhbbd42a62004-05-22 17:41:58 +0000133** Macros to determine whether the machine is big or little endian,
134** evaluated at runtime.
135*/
136extern const int sqlite3one;
137#define SQLITE3_BIGENDIAN (*(char *)(&sqlite3one)==0)
138#define SQLITE3_LITTLEENDIAN (*(char *)(&sqlite3one)==1)
139
140/*
drh905793e2004-02-21 13:31:09 +0000141** Defer sourcing vdbe.h until after the "u8" typedef is defined.
142*/
143#include "vdbe.h"
drh3aac2dd2004-04-26 14:10:20 +0000144#include "btree.h"
drh905793e2004-02-21 13:31:09 +0000145
146/*
drh384eef32004-01-07 03:04:27 +0000147** Most C compilers these days recognize "long double", don't they?
148** Just in case we encounter one that does not, we will create a macro
149** for long double so that it can be easily changed to just "double".
150*/
151#ifndef LONGDOUBLE_TYPE
152# define LONGDOUBLE_TYPE long double
153#endif
154
155/*
drh5a2c2c22001-11-21 02:21:11 +0000156** This macro casts a pointer to an integer. Useful for doing
157** pointer arithmetic.
158*/
159#define Addr(X) ((uptr)X)
drh41a2b482001-01-20 19:52:49 +0000160
161/*
drh872ff862001-09-15 14:43:39 +0000162** The maximum number of bytes of data that can be put into a single
drhf9b596e2004-05-26 16:54:42 +0000163** row of a single table. The upper bound on this limit is
164** 9223372036854775808 bytes (or 2**63). We have arbitrarily set the
165** limit to just 1MB here because the overflow page chain is inefficient
166** for really big records and we want to discourage people from thinking that
drh80ff32f2001-11-04 18:32:46 +0000167** multi-megabyte records are OK. If your needs are different, you can
168** change this define and recompile to increase or decrease the record
169** size.
drh872ff862001-09-15 14:43:39 +0000170*/
drh8372b8d2003-05-29 17:50:55 +0000171#define MAX_BYTES_PER_ROW 1048576
drh872ff862001-09-15 14:43:39 +0000172
173/*
drh967e8b72000-06-21 13:59:10 +0000174** If memory allocation problems are found, recompile with
175**
176** -DMEMORY_DEBUG=1
177**
178** to enable some sanity checking on malloc() and free(). To
179** check for memory leaks, recompile with
180**
181** -DMEMORY_DEBUG=2
182**
183** and a line of text will be written to standard error for
184** each malloc() and free(). This output can be analyzed
185** by an AWK script to determine if there are any leaks.
186*/
drhdcc581c2000-05-30 13:44:19 +0000187#ifdef MEMORY_DEBUG
danielk19774adee202004-05-08 08:23:19 +0000188# define sqliteMalloc(X) sqlite3Malloc_(X,1,__FILE__,__LINE__)
189# define sqliteMallocRaw(X) sqlite3Malloc_(X,0,__FILE__,__LINE__)
190# define sqliteFree(X) sqlite3Free_(X,__FILE__,__LINE__)
191# define sqliteRealloc(X,Y) sqlite3Realloc_(X,Y,__FILE__,__LINE__)
192# define sqliteStrDup(X) sqlite3StrDup_(X,__FILE__,__LINE__)
193# define sqliteStrNDup(X,Y) sqlite3StrNDup_(X,Y,__FILE__,__LINE__)
194 void sqlite3StrRealloc(char**);
drhc3c2fc92000-05-31 22:58:39 +0000195#else
danielk19774adee202004-05-08 08:23:19 +0000196# define sqlite3Realloc_(X,Y) sqliteRealloc(X,Y)
197# define sqlite3StrRealloc(X)
drhdcc581c2000-05-30 13:44:19 +0000198#endif
199
drh75897232000-05-29 14:26:00 +0000200/*
drhdaffd0e2001-04-11 14:28:42 +0000201** This variable gets set if malloc() ever fails. After it gets set,
202** the SQLite library shuts down permanently.
203*/
danielk19776f8a5032004-05-10 10:34:51 +0000204extern int sqlite3_malloc_failed;
drhdaffd0e2001-04-11 14:28:42 +0000205
206/*
drh6e142f52000-06-08 13:36:40 +0000207** The following global variables are used for testing and debugging
drh8c82b352000-12-10 18:23:50 +0000208** only. They only work if MEMORY_DEBUG is defined.
drh6e142f52000-06-08 13:36:40 +0000209*/
210#ifdef MEMORY_DEBUG
danielk19776f8a5032004-05-10 10:34:51 +0000211extern int sqlite3_nMalloc; /* Number of sqliteMalloc() calls */
212extern int sqlite3_nFree; /* Number of sqliteFree() calls */
213extern int sqlite3_iMallocFail; /* Fail sqliteMalloc() after this many calls */
drh6e142f52000-06-08 13:36:40 +0000214#endif
215
216/*
drh75897232000-05-29 14:26:00 +0000217** Name of the master database table. The master database table
218** is a special table that holds the names and attributes of all
219** user tables and indices.
220*/
drhe0bc4042002-06-25 01:09:11 +0000221#define MASTER_NAME "sqlite_master"
222#define TEMP_MASTER_NAME "sqlite_temp_master"
drh75897232000-05-29 14:26:00 +0000223
224/*
danielk19778e150812004-05-10 01:17:37 +0000225** The root-page of the master database table.
226*/
227#define MASTER_ROOT 1
228
229/*
drhed6c8672003-01-12 18:02:16 +0000230** The name of the schema table.
231*/
danielk1977ef2cb632004-05-29 02:37:19 +0000232#define SCHEMA_TABLE(x) (x==1?TEMP_MASTER_NAME:MASTER_NAME)
drhed6c8672003-01-12 18:02:16 +0000233
234/*
drh75897232000-05-29 14:26:00 +0000235** A convenience macro that returns the number of elements in
236** an array.
237*/
238#define ArraySize(X) (sizeof(X)/sizeof(X[0]))
239
240/*
241** Forward references to structures
242*/
drh7020f652000-06-03 18:06:52 +0000243typedef struct Column Column;
drh75897232000-05-29 14:26:00 +0000244typedef struct Table Table;
245typedef struct Index Index;
246typedef struct Instruction Instruction;
247typedef struct Expr Expr;
248typedef struct ExprList ExprList;
249typedef struct Parse Parse;
250typedef struct Token Token;
251typedef struct IdList IdList;
drhad3cab52002-05-24 02:04:32 +0000252typedef struct SrcList SrcList;
drh75897232000-05-29 14:26:00 +0000253typedef struct WhereInfo WhereInfo;
drh6b563442001-11-07 16:48:26 +0000254typedef struct WhereLevel WhereLevel;
drh9bb61fe2000-06-05 16:01:39 +0000255typedef struct Select Select;
drh22827922000-06-06 17:27:05 +0000256typedef struct AggExpr AggExpr;
drh0bce8352002-02-28 00:41:10 +0000257typedef struct FuncDef FuncDef;
danielk1977c3f9bad2002-05-15 08:30:12 +0000258typedef struct Trigger Trigger;
259typedef struct TriggerStep TriggerStep;
260typedef struct TriggerStack TriggerStack;
drhc2eef3b2002-08-31 18:53:06 +0000261typedef struct FKey FKey;
drh001bbcb2003-03-19 03:14:00 +0000262typedef struct Db Db;
drh85e20962003-04-25 17:52:11 +0000263typedef struct AuthContext AuthContext;
danielk19778d059842004-05-12 11:24:02 +0000264typedef struct KeyClass KeyClass;
drha9fd84b2004-05-18 23:21:35 +0000265typedef struct CollSeq CollSeq;
drhd3d39e92004-05-20 22:16:29 +0000266typedef struct KeyInfo KeyInfo;
267
drh001bbcb2003-03-19 03:14:00 +0000268
269/*
270** Each database file to be accessed by the system is an instance
271** of the following structure. There are normally two of these structures
272** in the sqlite.aDb[] array. aDb[0] is the main database file and
drha69d9162003-04-17 22:57:53 +0000273** aDb[1] is the database file used to hold temporary tables. Additional
274** databases may be attached.
drh001bbcb2003-03-19 03:14:00 +0000275*/
276struct Db {
277 char *zName; /* Name of this database */
278 Btree *pBt; /* The B*Tree structure for this database file */
279 int schema_cookie; /* Database schema version number for this file */
drhd24cc422003-03-27 12:51:24 +0000280 Hash tblHash; /* All tables indexed by name */
281 Hash idxHash; /* All (named) indices indexed by name */
282 Hash trigHash; /* All triggers indexed by name */
283 Hash aFKey; /* Foreign keys indexed by to-table */
drh1aa49652003-06-02 23:14:13 +0000284 u8 inTrans; /* 0: not writable. 1: Transaction. 2: Checkpoint */
drhd24cc422003-03-27 12:51:24 +0000285 u16 flags; /* Flags associated with this database */
drh4d189ca2004-02-12 18:46:38 +0000286 void *pAux; /* Auxiliary data. Usually NULL */
287 void (*xFreeAux)(void*); /* Routine to free pAux */
drh001bbcb2003-03-19 03:14:00 +0000288};
drh75897232000-05-29 14:26:00 +0000289
290/*
drh8bf8dc92003-05-17 17:35:10 +0000291** These macros can be used to test, set, or clear bits in the
292** Db.flags field.
293*/
294#define DbHasProperty(D,I,P) (((D)->aDb[I].flags&(P))==(P))
295#define DbHasAnyProperty(D,I,P) (((D)->aDb[I].flags&(P))!=0)
296#define DbSetProperty(D,I,P) (D)->aDb[I].flags|=(P)
297#define DbClearProperty(D,I,P) (D)->aDb[I].flags&=~(P)
298
299/*
300** Allowed values for the DB.flags field.
301**
302** The DB_Locked flag is set when the first OP_Transaction or OP_Checkpoint
303** opcode is emitted for a database. This prevents multiple occurances
304** of those opcodes for the same database in the same program. Similarly,
305** the DB_Cookie flag is set when the OP_VerifyCookie opcode is emitted,
306** and prevents duplicate OP_VerifyCookies from taking up space and slowing
307** down execution.
308**
309** The DB_SchemaLoaded flag is set after the database schema has been
310** read into internal hash tables.
311**
312** DB_UnresetViews means that one or more views have column names that
313** have been filled out. If the schema changes, these column names might
314** changes and so the view will need to be reset.
315*/
316#define DB_Locked 0x0001 /* OP_Transaction opcode has been emitted */
317#define DB_Cookie 0x0002 /* OP_VerifyCookie opcode has been emiited */
318#define DB_SchemaLoaded 0x0004 /* The schema has been loaded */
319#define DB_UnresetViews 0x0008 /* Some views have defined column names */
320
danielk19774ad17132004-05-21 01:47:26 +0000321/*
322** Possible values for the Db.textEnc field.
323*/
danielk19778a6b5412004-05-24 07:04:25 +0000324#define TEXT_Utf8 1
325#define TEXT_Utf16le 2
326#define TEXT_Utf16be 3
327#define TEXT_Utf16 (SQLITE3_BIGENDIAN?TEXT_Utf16be:TEXT_Utf16le)
drh8bf8dc92003-05-17 17:35:10 +0000328
329/*
drhc9b84a12002-06-20 11:36:48 +0000330** Each database is an instance of the following structure.
331**
drh13bff812003-04-15 01:19:47 +0000332** The sqlite.temp_store determines where temporary database files
333** are stored. If 1, then a file is created to hold those tables. If
334** 2, then they are held in memory. 0 means use the default value in
335** the TEMP_STORE macro.
rdcb0c374f2004-02-20 22:53:38 +0000336**
337** The sqlite.lastRowid records the last insert rowid generated by an
338** insert statement. Inserts on views do not affect its value. Each
339** trigger has its own context, so that lastRowid can be updated inside
340** triggers as usual. The previous value will be restored once the trigger
341** exits. Upon entering a before or instead of trigger, lastRowid is no
342** longer (since after version 2.8.12) reset to -1.
343**
344** The sqlite.nChange does not count changes within triggers and keeps no
danielk19776f8a5032004-05-10 10:34:51 +0000345** context. It is reset at start of sqlite3_exec.
rdcb0c374f2004-02-20 22:53:38 +0000346** The sqlite.lsChange represents the number of changes made by the last
347** insert, update, or delete statement. It remains constant throughout the
348** length of a statement and is then updated by OP_SetCounts. It keeps a
349** context stack just like lastRowid so that the count of changes
350** within a trigger is not seen outside the trigger. Changes to views do not
351** affect the value of lsChange.
352** The sqlite.csChange keeps track of the number of current changes (since
353** the last statement) and is used to update sqlite_lsChange.
danielk19776622cce2004-05-20 11:00:52 +0000354**
355** The member variables sqlite.errCode, sqlite.zErrMsg and sqlite.zErrMsg16
356** store the most recent error code and, if applicable, string. The
357** internal function sqlite3Error() is used to set these variables
358** consistently.
drh75897232000-05-29 14:26:00 +0000359*/
360struct sqlite {
drh001bbcb2003-03-19 03:14:00 +0000361 int nDb; /* Number of backends currently in use */
362 Db *aDb; /* All backends */
363 Db aDbStatic[2]; /* Static space for the 2 default backends */
drh5e00f6c2001-09-13 13:46:56 +0000364 int flags; /* Miscellanous flags. See below */
drh973b6e32003-02-12 14:09:42 +0000365 u8 file_format; /* What file format version is this database? */
366 u8 safety_level; /* How aggressive at synching data to disk */
drh94e92032003-02-16 22:21:32 +0000367 u8 want_to_close; /* Close after all VDBEs are deallocated */
drh1d85d932004-02-14 23:05:52 +0000368 u8 temp_store; /* 1=file, 2=memory, 0=compile-time default */
369 u8 onError; /* Default conflict algorithm */
drh001bbcb2003-03-19 03:14:00 +0000370 int next_cookie; /* Next value of aDb[0].schema_cookie */
drhcd61c282002-03-06 22:01:34 +0000371 int cache_size; /* Number of pages to use in the cache */
drh5e00f6c2001-09-13 13:46:56 +0000372 int nTable; /* Number of tables in the database */
373 void *pBusyArg; /* 1st Argument to the busy callback */
drh353f57e2000-08-02 12:26:28 +0000374 int (*xBusyCallback)(void *,const char*,int); /* The busy callback */
drhaa940ea2004-01-15 02:44:03 +0000375 void *pCommitArg; /* Argument to xCommitCallback() */
376 int (*xCommitCallback)(void*);/* Invoked at every commit. */
drh0bce8352002-02-28 00:41:10 +0000377 Hash aFunc; /* All functions that can be in SQL exprs */
drha9fd84b2004-05-18 23:21:35 +0000378 Hash aCollSeq; /* All collating sequences */
drhd3d39e92004-05-20 22:16:29 +0000379 CollSeq *pDfltColl; /* The default collating sequence (BINARY) */
drhf328bc82004-05-10 23:29:49 +0000380 i64 lastRowid; /* ROWID of most recent insert (see above) */
381 i64 priorNewRowid; /* Last randomly generated ROWID */
drh247be432002-05-10 05:44:55 +0000382 int magic; /* Magic number for detect library misuse */
rdcb0c374f2004-02-20 22:53:38 +0000383 int nChange; /* Number of rows changed (see above) */
384 int lsChange; /* Last statement change count (see above) */
385 int csChange; /* Current statement change count (see above) */
danielk19774adee202004-05-08 08:23:19 +0000386 struct sqlite3InitInfo { /* Information used during initialization */
drh1d85d932004-02-14 23:05:52 +0000387 int iDb; /* When back is being initialized */
388 int newTnum; /* Rootpage of table being initialized */
389 u8 busy; /* TRUE if currently initializing */
390 } init;
drh326dce72003-01-29 14:06:07 +0000391 struct Vdbe *pVdbe; /* List of active virtual machines */
drh18de4822003-01-16 16:28:53 +0000392 void (*xTrace)(void*,const char*); /* Trace function */
393 void *pTraceArg; /* Argument to the trace function */
drhed6c8672003-01-12 18:02:16 +0000394#ifndef SQLITE_OMIT_AUTHORIZATION
drhe22a3342003-04-22 20:30:37 +0000395 int (*xAuth)(void*,int,const char*,const char*,const char*,const char*);
396 /* Access authorization function */
drhed6c8672003-01-12 18:02:16 +0000397 void *pAuthArg; /* 1st argument to the access auth function */
398#endif
danielk1977348bb5d2003-10-18 09:37:26 +0000399#ifndef SQLITE_OMIT_PROGRESS_CALLBACK
400 int (*xProgress)(void *); /* The progress callback */
401 void *pProgressArg; /* Argument to the progress callback */
402 int nProgressOps; /* Number of opcodes for progress callback */
403#endif
danielk19774adee202004-05-08 08:23:19 +0000404
danielk19776622cce2004-05-20 11:00:52 +0000405 int errCode; /* Most recent error code (SQLITE_*) */
danielk19774adee202004-05-08 08:23:19 +0000406 char *zErrMsg; /* Most recent error message (UTF-8 encoded) */
danielk19776622cce2004-05-20 11:00:52 +0000407 void *zErrMsg16; /* Most recent error message (UTF-16 encoded) */
danielk1977b1bc9532004-05-22 03:05:33 +0000408 u8 enc; /* Text encoding for this database. */
drh75897232000-05-29 14:26:00 +0000409};
410
411/*
drh8bf8dc92003-05-17 17:35:10 +0000412** Possible values for the sqlite.flags and or Db.flags fields.
413**
414** On sqlite.flags, the SQLITE_InTrans value means that we have
415** executed a BEGIN. On Db.flags, SQLITE_InTrans means a statement
416** transaction is active on that particular database file.
drh75897232000-05-29 14:26:00 +0000417*/
drh5e00f6c2001-09-13 13:46:56 +0000418#define SQLITE_VdbeTrace 0x00000001 /* True to trace VDBE execution */
419#define SQLITE_Initialized 0x00000002 /* True after initialization */
420#define SQLITE_Interrupt 0x00000004 /* Cancel current operation */
421#define SQLITE_InTrans 0x00000008 /* True if in a transaction */
422#define SQLITE_InternChanges 0x00000010 /* Uncommitted Hash table changes */
drh382c0242001-10-06 16:33:02 +0000423#define SQLITE_FullColNames 0x00000020 /* Show full column names on SELECT */
drhfcabd462004-02-20 14:50:58 +0000424#define SQLITE_ShortColNames 0x00000040 /* Show short columns names */
425#define SQLITE_CountRows 0x00000080 /* Count rows changed by INSERT, */
drh1bee3d72001-10-15 00:44:35 +0000426 /* DELETE, or UPDATE and return */
427 /* the count using a callback. */
drhfcabd462004-02-20 14:50:58 +0000428#define SQLITE_NullCallback 0x00000100 /* Invoke the callback once if the */
drh6a535342001-10-19 16:44:56 +0000429 /* result set is empty */
drh58b95762000-06-02 01:17:37 +0000430
431/*
drh247be432002-05-10 05:44:55 +0000432** Possible values for the sqlite.magic field.
433** The numbers are obtained at random and have no special meaning, other
434** than being distinct from one another.
435*/
436#define SQLITE_MAGIC_OPEN 0xa029a697 /* Database is open */
437#define SQLITE_MAGIC_CLOSED 0x9f3c2d33 /* Database is closed */
438#define SQLITE_MAGIC_BUSY 0xf03b7906 /* Database currently in use */
439#define SQLITE_MAGIC_ERROR 0xb5357930 /* An SQLITE_MISUSE error occurred */
440
441/*
drh0bce8352002-02-28 00:41:10 +0000442** Each SQL function is defined by an instance of the following
443** structure. A pointer to this structure is stored in the sqlite.aFunc
drh8e0a2f92002-02-23 23:45:45 +0000444** hash table. When multiple functions have the same name, the hash table
445** points to a linked list of these structures.
drh28037572000-08-02 13:47:41 +0000446*/
drh0bce8352002-02-28 00:41:10 +0000447struct FuncDef {
drhf9b596e2004-05-26 16:54:42 +0000448 char *zName; /* SQL name of the function */
449 int nArg; /* Number of arguments. -1 means unlimited */
450 void *pUserData; /* User data parameter */
451 FuncDef *pNext; /* Next function with same name */
452 void (*xFunc)(sqlite3_context*,int,sqlite3_value**); /* Regular function */
453 void (*xStep)(sqlite3_context*,int,sqlite3_value**); /* Aggregate step */
454 void (*xFinalize)(sqlite3_context*); /* Aggregate finializer */
drh8e0a2f92002-02-23 23:45:45 +0000455};
drh28037572000-08-02 13:47:41 +0000456
457/*
drh967e8b72000-06-21 13:59:10 +0000458** information about each column of an SQL table is held in an instance
drh7020f652000-06-03 18:06:52 +0000459** of this structure.
460*/
461struct Column {
drh967e8b72000-06-21 13:59:10 +0000462 char *zName; /* Name of this column */
463 char *zDflt; /* Default value of this column */
drh382c0242001-10-06 16:33:02 +0000464 char *zType; /* Data type for this column */
drha9fd84b2004-05-18 23:21:35 +0000465 CollSeq *pColl; /* Collating sequence. If NULL, use the default */
drh4a324312001-12-21 14:30:42 +0000466 u8 notNull; /* True if there is a NOT NULL constraint */
drh78100cc2003-08-23 22:40:53 +0000467 u8 isPrimKey; /* True if this column is part of the PRIMARY KEY */
danielk1977a37cdde2004-05-16 11:15:36 +0000468 char affinity; /* One of the SQLITE_AFF_... values */
drhfcabd462004-02-20 14:50:58 +0000469 u8 dottedName; /* True if zName contains a "." character */
drh7020f652000-06-03 18:06:52 +0000470};
471
472/*
drha9fd84b2004-05-18 23:21:35 +0000473** A "Collating Sequence" is defined by an instance of the following
474** structure. Every collating sequence has a name and a comparison
475** function that defines the order of text for that sequence. The
476** CollSeq.pUser parameter is an extra parameter that passed in as
477** the first argument to the comparison function.
478**
479** If CollSeq.xCmp is NULL, it means that the collating sequence is
480** undefined. Indices built on an undefined collating sequence may
481** not be read or written.
482*/
483struct CollSeq {
484 char *zName; /* Name of the collating sequence */
485 void *pUser; /* First argument to xCmp() */
486 int (*xCmp)(void*,int,const void*,int,const void*); /* Comparison function */
487};
488
489/*
drhd3d39e92004-05-20 22:16:29 +0000490** A sort order can be either ASC or DESC.
drh8e2ca022002-06-17 17:07:19 +0000491*/
drh8e2ca022002-06-17 17:07:19 +0000492#define SQLITE_SO_ASC 0 /* Sort in ascending order */
drhd3d39e92004-05-20 22:16:29 +0000493#define SQLITE_SO_DESC 1 /* Sort in ascending order */
drh8e2ca022002-06-17 17:07:19 +0000494
495/*
danielk1977a37cdde2004-05-16 11:15:36 +0000496** Column affinity types.
497*/
498#define SQLITE_AFF_INTEGER 'i'
499#define SQLITE_AFF_NUMERIC 'n'
500#define SQLITE_AFF_TEXT 't'
501#define SQLITE_AFF_NONE 'o'
502
503
504/*
drh22f70c32002-02-18 01:17:00 +0000505** Each SQL table is represented in memory by an instance of the
506** following structure.
507**
drhd24cc422003-03-27 12:51:24 +0000508** Table.zName is the name of the table. The case of the original
drh22f70c32002-02-18 01:17:00 +0000509** CREATE TABLE statement is stored, but case is not significant for
510** comparisons.
511**
drhd24cc422003-03-27 12:51:24 +0000512** Table.nCol is the number of columns in this table. Table.aCol is a
drh22f70c32002-02-18 01:17:00 +0000513** pointer to an array of Column structures, one for each column.
514**
drhd24cc422003-03-27 12:51:24 +0000515** If the table has an INTEGER PRIMARY KEY, then Table.iPKey is the index of
516** the column that is that key. Otherwise Table.iPKey is negative. Note
drh22f70c32002-02-18 01:17:00 +0000517** that the datatype of the PRIMARY KEY must be INTEGER for this field to
518** be set. An INTEGER PRIMARY KEY is used as the rowid for each row of
519** the table. If a table has no INTEGER PRIMARY KEY, then a random rowid
drhd24cc422003-03-27 12:51:24 +0000520** is generated for each row of the table. Table.hasPrimKey is true if
drh22f70c32002-02-18 01:17:00 +0000521** the table has any PRIMARY KEY, INTEGER or otherwise.
522**
drhd24cc422003-03-27 12:51:24 +0000523** Table.tnum is the page number for the root BTree page of the table in the
524** database file. If Table.iDb is the index of the database table backend
525** in sqlite.aDb[]. 0 is for the main database and 1 is for the file that
526** holds temporary tables and indices. If Table.isTransient
drh22f70c32002-02-18 01:17:00 +0000527** is true, then the table is stored in a file that is automatically deleted
drhd24cc422003-03-27 12:51:24 +0000528** when the VDBE cursor to the table is closed. In this case Table.tnum
drh22f70c32002-02-18 01:17:00 +0000529** refers VDBE cursor number that holds the table open, not to the root
530** page number. Transient tables are used to hold the results of a
531** sub-query that appears instead of a real table name in the FROM clause
532** of a SELECT statement.
drh75897232000-05-29 14:26:00 +0000533*/
534struct Table {
drh967e8b72000-06-21 13:59:10 +0000535 char *zName; /* Name of the table */
drh967e8b72000-06-21 13:59:10 +0000536 int nCol; /* Number of columns in this table */
537 Column *aCol; /* Information about each column */
drhc8392582001-12-31 02:48:51 +0000538 int iPKey; /* If not less then 0, use aCol[iPKey] as the primary key */
drh967e8b72000-06-21 13:59:10 +0000539 Index *pIndex; /* List of SQL indexes on this table. */
drh22f70c32002-02-18 01:17:00 +0000540 int tnum; /* Root BTree node for this table (see note above) */
drha76b5df2002-02-23 02:32:10 +0000541 Select *pSelect; /* NULL for tables. Points to definition if a view. */
drh717e6402001-09-27 03:22:32 +0000542 u8 readOnly; /* True if this table should not be written by the user */
drhd24cc422003-03-27 12:51:24 +0000543 u8 iDb; /* Index into sqlite.aDb[] of the backend for this table */
drh22f70c32002-02-18 01:17:00 +0000544 u8 isTransient; /* True if automatically deleted when VDBE finishes */
drh4a324312001-12-21 14:30:42 +0000545 u8 hasPrimKey; /* True if there exists a primary key */
drh9cfcf5d2002-01-29 18:41:24 +0000546 u8 keyConf; /* What to do in case of uniqueness conflict on iPKey */
danielk1977c3f9bad2002-05-15 08:30:12 +0000547 Trigger *pTrigger; /* List of SQL triggers on this table */
drhc2eef3b2002-08-31 18:53:06 +0000548 FKey *pFKey; /* Linked list of all foreign keys in this table */
danielk19773d1bfea2004-05-14 11:00:53 +0000549 char *zColAff; /* String defining the affinity of each column */
drh75897232000-05-29 14:26:00 +0000550};
551
552/*
drhc2eef3b2002-08-31 18:53:06 +0000553** Each foreign key constraint is an instance of the following structure.
554**
555** A foreign key is associated with two tables. The "from" table is
556** the table that contains the REFERENCES clause that creates the foreign
557** key. The "to" table is the table that is named in the REFERENCES clause.
558** Consider this example:
559**
560** CREATE TABLE ex1(
561** a INTEGER PRIMARY KEY,
562** b INTEGER CONSTRAINT fk1 REFERENCES ex2(x)
563** );
564**
565** For foreign key "fk1", the from-table is "ex1" and the to-table is "ex2".
566**
567** Each REFERENCES clause generates an instance of the following structure
568** which is attached to the from-table. The to-table need not exist when
569** the from-table is created. The existance of the to-table is not checked
570** until an attempt is made to insert data into the from-table.
571**
drhea1ba172003-04-20 00:00:23 +0000572** The sqlite.aFKey hash table stores pointers to this structure
drhc2eef3b2002-08-31 18:53:06 +0000573** given the name of a to-table. For each to-table, all foreign keys
574** associated with that table are on a linked list using the FKey.pNextTo
575** field.
576*/
577struct FKey {
578 Table *pFrom; /* The table that constains the REFERENCES clause */
579 FKey *pNextFrom; /* Next foreign key in pFrom */
580 char *zTo; /* Name of table that the key points to */
581 FKey *pNextTo; /* Next foreign key that points to zTo */
582 int nCol; /* Number of columns in this key */
583 struct sColMap { /* Mapping of columns in pFrom to columns in zTo */
584 int iFrom; /* Index of column in pFrom */
585 char *zCol; /* Name of column in zTo. If 0 use PRIMARY KEY */
586 } *aCol; /* One entry for each of nCol column s */
587 u8 isDeferred; /* True if constraint checking is deferred till COMMIT */
588 u8 updateConf; /* How to resolve conflicts that occur on UPDATE */
589 u8 deleteConf; /* How to resolve conflicts that occur on DELETE */
590 u8 insertConf; /* How to resolve conflicts that occur on INSERT */
591};
592
593/*
594** SQLite supports many different ways to resolve a contraint
drh22f70c32002-02-18 01:17:00 +0000595** error. ROLLBACK processing means that a constraint violation
drh0bd1f4e2002-06-06 18:54:39 +0000596** causes the operation in process to fail and for the current transaction
drh1c928532002-01-31 15:54:21 +0000597** to be rolled back. ABORT processing means the operation in process
598** fails and any prior changes from that one operation are backed out,
599** but the transaction is not rolled back. FAIL processing means that
600** the operation in progress stops and returns an error code. But prior
601** changes due to the same operation are not backed out and no rollback
602** occurs. IGNORE means that the particular row that caused the constraint
603** error is not inserted or updated. Processing continues and no error
604** is returned. REPLACE means that preexisting database rows that caused
605** a UNIQUE constraint violation are removed so that the new insert or
606** update can proceed. Processing continues and no error is reported.
drhc2eef3b2002-08-31 18:53:06 +0000607**
608** RESTRICT, SETNULL, and CASCADE actions apply only to foreign keys.
609** RESTRICT is the same as ABORT for IMMEDIATE foreign keys and the
610** same as ROLLBACK for DEFERRED keys. SETNULL means that the foreign
611** key is set to NULL. CASCADE means that a DELETE or UPDATE of the
612** referenced table row is propagated into the row that holds the
613** foreign key.
drh1c928532002-01-31 15:54:21 +0000614**
drh968af522003-02-11 14:55:40 +0000615** The following symbolic values are used to record which type
drh1c928532002-01-31 15:54:21 +0000616** of action to take.
drh9cfcf5d2002-01-29 18:41:24 +0000617*/
drh1c928532002-01-31 15:54:21 +0000618#define OE_None 0 /* There is no constraint to check */
619#define OE_Rollback 1 /* Fail the operation and rollback the transaction */
620#define OE_Abort 2 /* Back out changes but do no rollback transaction */
621#define OE_Fail 3 /* Stop the operation but leave all prior changes */
622#define OE_Ignore 4 /* Ignore the error. Do not do the INSERT or UPDATE */
623#define OE_Replace 5 /* Delete existing record, then do INSERT or UPDATE */
drhc2eef3b2002-08-31 18:53:06 +0000624
625#define OE_Restrict 6 /* OE_Abort for IMMEDIATE, OE_Rollback for DEFERRED */
626#define OE_SetNull 7 /* Set the foreign key value to NULL */
627#define OE_SetDflt 8 /* Set the foreign key value to its default */
628#define OE_Cascade 9 /* Cascade the changes */
629
630#define OE_Default 99 /* Do whatever the default action is */
drh9cfcf5d2002-01-29 18:41:24 +0000631
drhd3d39e92004-05-20 22:16:29 +0000632
633/*
634** An instance of the following structure is passed as the first
635** argument to sqlite3VdbeKeyCompare and is used to control the
636** comparison of the two index keys.
637**
638** If the KeyInfo.incrKey value is true and the comparison would
639** otherwise be equal, then return a result as if the second key larger.
640*/
641struct KeyInfo {
danielk1977b1bc9532004-05-22 03:05:33 +0000642 u8 enc; /* Text encoding - one of the TEXT_Utf* values */
drhd3d39e92004-05-20 22:16:29 +0000643 u8 incrKey; /* Increase 2nd key by epsilon before comparison */
644 int nField; /* Number of entries in aColl[] */
drhffbc3082004-05-21 01:29:06 +0000645 u8 *aSortOrder; /* If defined an aSortOrder[i] is true, sort DESC */
drhd3d39e92004-05-20 22:16:29 +0000646 CollSeq *aColl[1]; /* Collating sequence for each term of the key */
647};
648
drh9cfcf5d2002-01-29 18:41:24 +0000649/*
drh66b89c82000-11-28 20:47:17 +0000650** Each SQL index is represented in memory by an
drh75897232000-05-29 14:26:00 +0000651** instance of the following structure.
drh967e8b72000-06-21 13:59:10 +0000652**
653** The columns of the table that are to be indexed are described
654** by the aiColumn[] field of this structure. For example, suppose
655** we have the following table and index:
656**
657** CREATE TABLE Ex1(c1 int, c2 int, c3 text);
658** CREATE INDEX Ex2 ON Ex1(c3,c1);
659**
660** In the Table structure describing Ex1, nCol==3 because there are
661** three columns in the table. In the Index structure describing
662** Ex2, nColumn==2 since 2 of the 3 columns of Ex1 are indexed.
663** The value of aiColumn is {2, 0}. aiColumn[0]==2 because the
664** first column to be indexed (c3) has an index of 2 in Ex1.aCol[].
665** The second column to be indexed (c1) has an index of 0 in
666** Ex1.aCol[], hence Ex2.aiColumn[1]==0.
drhea1ba172003-04-20 00:00:23 +0000667**
668** The Index.onError field determines whether or not the indexed columns
669** must be unique and what to do if they are not. When Index.onError=OE_None,
670** it means this is not a unique index. Otherwise it is a unique index
671** and the value of Index.onError indicate the which conflict resolution
672** algorithm to employ whenever an attempt is made to insert a non-unique
673** element.
drh75897232000-05-29 14:26:00 +0000674*/
675struct Index {
drh967e8b72000-06-21 13:59:10 +0000676 char *zName; /* Name of this index */
drh967e8b72000-06-21 13:59:10 +0000677 int nColumn; /* Number of columns in the table used by this index */
678 int *aiColumn; /* Which columns are used by this index. 1st is 0 */
679 Table *pTable; /* The SQL table being indexed */
drhbe0072d2001-09-13 14:46:09 +0000680 int tnum; /* Page containing root of this index in database file */
drh9cfcf5d2002-01-29 18:41:24 +0000681 u8 onError; /* OE_Abort, OE_Ignore, OE_Replace, or OE_None */
drh485b39b2002-07-13 03:11:52 +0000682 u8 autoIndex; /* True if is automatically created (ex: by UNIQUE) */
drhd24cc422003-03-27 12:51:24 +0000683 u8 iDb; /* Index in sqlite.aDb[] of where this index is stored */
danielk1977a37cdde2004-05-16 11:15:36 +0000684 char *zColAff; /* String defining the affinity of each column */
drh967e8b72000-06-21 13:59:10 +0000685 Index *pNext; /* The next index associated with the same table */
drhd3d39e92004-05-20 22:16:29 +0000686 KeyInfo keyInfo; /* Info on how to order keys. MUST BE LAST */
drh75897232000-05-29 14:26:00 +0000687};
688
689/*
690** Each token coming out of the lexer is an instance of
drh4b59ab52002-08-24 18:24:51 +0000691** this structure. Tokens are also used as part of an expression.
drh4efc4752004-01-16 15:55:37 +0000692**
693** Note if Token.z==0 then Token.dyn and Token.n are undefined and
694** may contain random values. Do not make any assuptions about Token.dyn
695** and Token.n when Token.z==0.
drh75897232000-05-29 14:26:00 +0000696*/
697struct Token {
drh80ff32f2001-11-04 18:32:46 +0000698 const char *z; /* Text of the token. Not NULL-terminated! */
drh4b59ab52002-08-24 18:24:51 +0000699 unsigned dyn : 1; /* True for malloced memory, false for static */
drh6977fea2002-10-22 23:38:04 +0000700 unsigned n : 31; /* Number of characters in this token */
drh75897232000-05-29 14:26:00 +0000701};
702
703/*
704** Each node of an expression in the parse tree is an instance
drh22f70c32002-02-18 01:17:00 +0000705** of this structure.
706**
707** Expr.op is the opcode. The integer parser token codes are reused
708** as opcodes here. For example, the parser defines TK_GE to be an integer
709** code representing the ">=" operator. This same integer code is reused
710** to represent the greater-than-or-equal-to operator in the expression
711** tree.
712**
713** Expr.pRight and Expr.pLeft are subexpressions. Expr.pList is a list
714** of argument if the expression is a function.
715**
drh4b59ab52002-08-24 18:24:51 +0000716** Expr.token is the operator token for this node. For some expressions
717** that have subexpressions, Expr.token can be the complete text that gave
718** rise to the Expr. In the latter case, the token is marked as being
719** a compound token.
drh22f70c32002-02-18 01:17:00 +0000720**
721** An expression of the form ID or ID.ID refers to a column in a table.
722** For such expressions, Expr.op is set to TK_COLUMN and Expr.iTable is
723** the integer cursor number of a VDBE cursor pointing to that table and
724** Expr.iColumn is the column number for the specific column. If the
725** expression is used as a result in an aggregate SELECT, then the
726** value is also stored in the Expr.iAgg column in the aggregate so that
727** it can be accessed after all aggregates are computed.
728**
729** If the expression is a function, the Expr.iTable is an integer code
drh7c972de2003-09-06 22:18:07 +0000730** representing which function. If the expression is an unbound variable
731** marker (a question mark character '?' in the original SQL) then the
732** Expr.iTable holds the index number for that variable.
drh22f70c32002-02-18 01:17:00 +0000733**
734** The Expr.pSelect field points to a SELECT statement. The SELECT might
735** be the right operand of an IN operator. Or, if a scalar SELECT appears
736** in an expression the opcode is TK_SELECT and Expr.pSelect is the only
737** operand.
drh75897232000-05-29 14:26:00 +0000738*/
739struct Expr {
drh1cc093c2002-06-24 22:01:57 +0000740 u8 op; /* Operation performed by this node */
drha9fd84b2004-05-18 23:21:35 +0000741 char affinity; /* The affinity of the column or 0 if not a column */
drhb5a20d32003-04-23 12:25:23 +0000742 u8 iDb; /* Database referenced by this expression */
drhe22a3342003-04-22 20:30:37 +0000743 u8 flags; /* Various flags. See below */
drh75897232000-05-29 14:26:00 +0000744 Expr *pLeft, *pRight; /* Left and right subnodes */
drhd99f7062002-06-08 23:25:08 +0000745 ExprList *pList; /* A list of expressions used as function arguments
746 ** or in "<expr> IN (<expr-list)" */
drh75897232000-05-29 14:26:00 +0000747 Token token; /* An operand token */
drh6977fea2002-10-22 23:38:04 +0000748 Token span; /* Complete text of the expression */
drh967e8b72000-06-21 13:59:10 +0000749 int iTable, iColumn; /* When op==TK_COLUMN, then this expr node means the
drh8e2ca022002-06-17 17:07:19 +0000750 ** iColumn-th field of the iTable-th table. */
drh967e8b72000-06-21 13:59:10 +0000751 int iAgg; /* When op==TK_COLUMN and pParse->useAgg==TRUE, pull
752 ** result from the iAgg-th element of the aggregator */
drhd99f7062002-06-08 23:25:08 +0000753 Select *pSelect; /* When the expression is a sub-select. Also the
754 ** right side of "<expr> IN (<select>)" */
drh75897232000-05-29 14:26:00 +0000755};
756
757/*
drh1f162302002-10-27 19:35:33 +0000758** The following are the meanings of bits in the Expr.flags field.
759*/
760#define EP_FromJoin 0x0001 /* Originated in ON or USING clause of a join */
drh1f162302002-10-27 19:35:33 +0000761
762/*
763** These macros can be used to test, set, or clear bits in the
764** Expr.flags field.
765*/
766#define ExprHasProperty(E,P) (((E)->flags&(P))==(P))
767#define ExprHasAnyProperty(E,P) (((E)->flags&(P))!=0)
768#define ExprSetProperty(E,P) (E)->flags|=(P)
769#define ExprClearProperty(E,P) (E)->flags&=~(P)
770
771/*
drh75897232000-05-29 14:26:00 +0000772** A list of expressions. Each expression may optionally have a
773** name. An expr/name combination can be used in several ways, such
774** as the list of "expr AS ID" fields following a "SELECT" or in the
775** list of "ID = expr" items in an UPDATE. A list of expressions can
drhad3cab52002-05-24 02:04:32 +0000776** also be used as the argument to a function, in which case the a.zName
drh75897232000-05-29 14:26:00 +0000777** field is not used.
778*/
779struct ExprList {
780 int nExpr; /* Number of expressions on the list */
drh4305d102003-07-30 12:34:12 +0000781 int nAlloc; /* Number of entries allocated below */
drh6d4abfb2001-10-22 02:58:08 +0000782 struct ExprList_item {
drh75897232000-05-29 14:26:00 +0000783 Expr *pExpr; /* The list of expressions */
784 char *zName; /* Token associated with this expression */
drh8e2ca022002-06-17 17:07:19 +0000785 u8 sortOrder; /* 1 for DESC or 0 for ASC */
786 u8 isAgg; /* True if this is an aggregate like count(*) */
787 u8 done; /* A flag to indicate when processing is finished */
drh75897232000-05-29 14:26:00 +0000788 } *a; /* One entry for each expression */
789};
790
791/*
drhad3cab52002-05-24 02:04:32 +0000792** An instance of this structure can hold a simple list of identifiers,
793** such as the list "a,b,c" in the following statements:
794**
795** INSERT INTO t(a,b,c) VALUES ...;
796** CREATE INDEX idx ON t(a,b,c);
797** CREATE TRIGGER trig BEFORE UPDATE ON t(a,b,c) ...;
798**
799** The IdList.a.idx field is used when the IdList represents the list of
800** column names after a table name in an INSERT statement. In the statement
801**
802** INSERT INTO t(a,b,c) ...
803**
804** If "a" is the k-th column of table "t", then IdList.a[0].idx==k.
drh75897232000-05-29 14:26:00 +0000805*/
806struct IdList {
807 int nId; /* Number of identifiers on the list */
drh4305d102003-07-30 12:34:12 +0000808 int nAlloc; /* Number of entries allocated for a[] below */
drh6d4abfb2001-10-22 02:58:08 +0000809 struct IdList_item {
drhad3cab52002-05-24 02:04:32 +0000810 char *zName; /* Name of the identifier */
drh967e8b72000-06-21 13:59:10 +0000811 int idx; /* Index in some Table.aCol[] of a column named zName */
drhad3cab52002-05-24 02:04:32 +0000812 } *a;
813};
814
815/*
816** The following structure describes the FROM clause of a SELECT statement.
817** Each table or subquery in the FROM clause is a separate element of
818** the SrcList.a[] array.
drhd24cc422003-03-27 12:51:24 +0000819**
820** With the addition of multiple database support, the following structure
821** can also be used to describe a particular table such as the table that
822** is modified by an INSERT, DELETE, or UPDATE statement. In standard SQL,
823** such a table must be a simple name: ID. But in SQLite, the table can
824** now be identified by a database name, a dot, then the table name: ID.ID.
drhad3cab52002-05-24 02:04:32 +0000825*/
826struct SrcList {
drh4305d102003-07-30 12:34:12 +0000827 u16 nSrc; /* Number of tables or subqueries in the FROM clause */
828 u16 nAlloc; /* Number of entries allocated in a[] below */
drhad3cab52002-05-24 02:04:32 +0000829 struct SrcList_item {
drh113088e2003-03-20 01:16:58 +0000830 char *zDatabase; /* Name of database holding this table */
drhad3cab52002-05-24 02:04:32 +0000831 char *zName; /* Name of the table */
832 char *zAlias; /* The "B" part of a "A AS B" phrase. zName is the "A" */
drhdaffd0e2001-04-11 14:28:42 +0000833 Table *pTab; /* An SQL table corresponding to zName */
834 Select *pSelect; /* A SELECT statement used in place of a table name */
drhad3cab52002-05-24 02:04:32 +0000835 int jointype; /* Type of join between this table and the next */
drh63eb5f22003-04-29 16:20:44 +0000836 int iCursor; /* The VDBE cursor number used to access this table */
drhad3cab52002-05-24 02:04:32 +0000837 Expr *pOn; /* The ON clause of a join */
838 IdList *pUsing; /* The USING clause of a join */
drh113088e2003-03-20 01:16:58 +0000839 } a[1]; /* One entry for each identifier on the list */
drh75897232000-05-29 14:26:00 +0000840};
841
842/*
drh01f3f252002-05-24 16:14:15 +0000843** Permitted values of the SrcList.a.jointype field
844*/
845#define JT_INNER 0x0001 /* Any kind of inner or cross join */
846#define JT_NATURAL 0x0002 /* True for a "natural" join */
drh195e6962002-05-25 00:18:20 +0000847#define JT_LEFT 0x0004 /* Left outer join */
848#define JT_RIGHT 0x0008 /* Right outer join */
drh01f3f252002-05-24 16:14:15 +0000849#define JT_OUTER 0x0010 /* The "OUTER" keyword is present */
850#define JT_ERROR 0x0020 /* unknown or unsupported join type */
851
852/*
drh6b563442001-11-07 16:48:26 +0000853** For each nested loop in a WHERE clause implementation, the WhereInfo
854** structure contains a single instance of this structure. This structure
855** is intended to be private the the where.c module and should not be
856** access or modified by other modules.
857*/
858struct WhereLevel {
859 int iMem; /* Memory cell used by this level */
860 Index *pIdx; /* Index used */
861 int iCur; /* Cursor number used for this index */
drh487ab3c2001-11-08 00:45:21 +0000862 int score; /* How well this indexed scored */
drh6b563442001-11-07 16:48:26 +0000863 int brk; /* Jump here to break out of the loop */
864 int cont; /* Jump here to continue with the next loop cycle */
865 int op, p1, p2; /* Opcode used to terminate the loop */
drhad2d8302002-05-24 20:31:36 +0000866 int iLeftJoin; /* Memory cell used to implement LEFT OUTER JOIN */
867 int top; /* First instruction of interior of the loop */
drhd99f7062002-06-08 23:25:08 +0000868 int inOp, inP1, inP2;/* Opcode used to implement an IN operator */
drhc045ec52002-12-04 20:01:06 +0000869 int bRev; /* Do the scan in the reverse direction */
drh6b563442001-11-07 16:48:26 +0000870};
871
872/*
drh75897232000-05-29 14:26:00 +0000873** The WHERE clause processing routine has two halves. The
874** first part does the start of the WHERE loop and the second
875** half does the tail of the WHERE loop. An instance of
876** this structure is returned by the first half and passed
877** into the second half to give some continuity.
878*/
879struct WhereInfo {
880 Parse *pParse;
drhad3cab52002-05-24 02:04:32 +0000881 SrcList *pTabList; /* List of tables in the join */
drh19a775c2000-06-05 18:54:46 +0000882 int iContinue; /* Jump here to continue with next record */
883 int iBreak; /* Jump here to break out of the loop */
drh6b563442001-11-07 16:48:26 +0000884 int nLevel; /* Number of nested loop */
drh832508b2002-03-02 17:04:07 +0000885 int savedNTab; /* Value of pParse->nTab before WhereBegin() */
886 int peakNTab; /* Value of pParse->nTab after WhereBegin() */
drh6b563442001-11-07 16:48:26 +0000887 WhereLevel a[1]; /* Information about each nest loop in the WHERE */
drh75897232000-05-29 14:26:00 +0000888};
889
890/*
drh9bb61fe2000-06-05 16:01:39 +0000891** An instance of the following structure contains all information
892** needed to generate code for a single SELECT statement.
drha76b5df2002-02-23 02:32:10 +0000893**
894** The zSelect field is used when the Select structure must be persistent.
895** Normally, the expression tree points to tokens in the original input
896** string that encodes the select. But if the Select structure must live
897** longer than its input string (for example when it is used to describe
898** a VIEW) we have to make a copy of the input string so that the nodes
899** of the expression tree will have something to point to. zSelect is used
900** to hold that copy.
drhd11d3822002-06-21 23:01:49 +0000901**
902** nLimit is set to -1 if there is no LIMIT clause. nOffset is set to 0.
903** If there is a LIMIT clause, the parser sets nLimit to the value of the
904** limit and nOffset to the value of the offset (or 0 if there is not
905** offset). But later on, nLimit and nOffset become the memory locations
906** in the VDBE that record the limit and offset counters.
drh9bb61fe2000-06-05 16:01:39 +0000907*/
908struct Select {
drh9bb61fe2000-06-05 16:01:39 +0000909 ExprList *pEList; /* The fields of the result */
drh7b58dae2003-07-20 01:16:46 +0000910 u8 op; /* One of: TK_UNION TK_ALL TK_INTERSECT TK_EXCEPT */
911 u8 isDistinct; /* True if the DISTINCT keyword is present */
drhad3cab52002-05-24 02:04:32 +0000912 SrcList *pSrc; /* The FROM clause */
drh9bb61fe2000-06-05 16:01:39 +0000913 Expr *pWhere; /* The WHERE clause */
914 ExprList *pGroupBy; /* The GROUP BY clause */
915 Expr *pHaving; /* The HAVING clause */
916 ExprList *pOrderBy; /* The ORDER BY clause */
drh967e8b72000-06-21 13:59:10 +0000917 Select *pPrior; /* Prior select in a compound select statement */
drh9bbca4c2001-11-06 04:00:18 +0000918 int nLimit, nOffset; /* LIMIT and OFFSET values. -1 means not used */
drh7b58dae2003-07-20 01:16:46 +0000919 int iLimit, iOffset; /* Memory registers holding LIMIT & OFFSET counters */
drha76b5df2002-02-23 02:32:10 +0000920 char *zSelect; /* Complete text of the SELECT command */
drh9bb61fe2000-06-05 16:01:39 +0000921};
922
923/*
drhfef52082000-06-06 01:50:43 +0000924** The results of a select can be distributed in several ways.
925*/
926#define SRT_Callback 1 /* Invoke a callback with each row of result */
927#define SRT_Mem 2 /* Store result in a memory cell */
drh82c3d632000-06-06 21:56:07 +0000928#define SRT_Set 3 /* Store result as unique keys in a table */
929#define SRT_Union 5 /* Store result as keys in a table */
930#define SRT_Except 6 /* Remove result from a UNION table */
drh5974a302000-06-07 14:42:26 +0000931#define SRT_Table 7 /* Store result as data with a unique key */
drh2d0794e2002-03-03 03:03:52 +0000932#define SRT_TempTable 8 /* Store result in a trasient table */
drhd7489c32002-05-27 12:24:48 +0000933#define SRT_Discard 9 /* Do not save the results anywhere */
drhf46f9052002-06-22 02:33:38 +0000934#define SRT_Sorter 10 /* Store results in the sorter */
drh142e30d2002-08-28 03:00:58 +0000935#define SRT_Subroutine 11 /* Call a subroutine to handle results */
drhfef52082000-06-06 01:50:43 +0000936
937/*
drh22827922000-06-06 17:27:05 +0000938** When a SELECT uses aggregate functions (like "count(*)" or "avg(f1)")
939** we have to do some additional analysis of expressions. An instance
940** of the following structure holds information about a single subexpression
941** somewhere in the SELECT statement. An array of these structures holds
942** all the information we need to generate code for aggregate
943** expressions.
944**
945** Note that when analyzing a SELECT containing aggregates, both
946** non-aggregate field variables and aggregate functions are stored
947** in the AggExpr array of the Parser structure.
948**
949** The pExpr field points to an expression that is part of either the
950** field list, the GROUP BY clause, the HAVING clause or the ORDER BY
951** clause. The expression will be freed when those clauses are cleaned
952** up. Do not try to delete the expression attached to AggExpr.pExpr.
953**
954** If AggExpr.pExpr==0, that means the expression is "count(*)".
955*/
956struct AggExpr {
957 int isAgg; /* if TRUE contains an aggregate function */
958 Expr *pExpr; /* The expression */
drh0bce8352002-02-28 00:41:10 +0000959 FuncDef *pFunc; /* Information about the aggregate function */
drh22827922000-06-06 17:27:05 +0000960};
961
962/*
drhf57b3392001-10-08 13:22:32 +0000963** An SQL parser context. A copy of this structure is passed through
964** the parser and down into all the parser action routine in order to
965** carry around information that is global to the entire parse.
drh75897232000-05-29 14:26:00 +0000966*/
967struct Parse {
968 sqlite *db; /* The main database structure */
drh4c504392000-10-16 22:06:40 +0000969 int rc; /* Return code from execution */
drh75897232000-05-29 14:26:00 +0000970 char *zErrMsg; /* An error message */
971 Token sErrToken; /* The token at which the error occurred */
danielk1977cbb18d22004-05-28 11:37:27 +0000972 Token sNameToken; /* Token with unqualified schema object name */
drh75897232000-05-29 14:26:00 +0000973 Token sLastToken; /* The last token parsed */
drh326dce72003-01-29 14:06:07 +0000974 const char *zTail; /* All SQL text past the last semicolon parsed */
drh75897232000-05-29 14:26:00 +0000975 Table *pNewTable; /* A table being constructed by CREATE TABLE */
976 Vdbe *pVdbe; /* An engine for executing database bytecode */
drh836faa42003-01-11 13:30:57 +0000977 u8 colNamesSet; /* TRUE after OP_ColumnName has been issued to pVdbe */
drhe0bc4042002-06-25 01:09:11 +0000978 u8 explain; /* True if the EXPLAIN flag is found on the query */
drhe0bc4042002-06-25 01:09:11 +0000979 u8 nameClash; /* A permanent table name clashes with temp table name */
980 u8 useAgg; /* If true, extract field values from the aggregator
981 ** while generating expressions. Normally false */
drh75897232000-05-29 14:26:00 +0000982 int nErr; /* Number of errors seen */
drh832508b2002-03-02 17:04:07 +0000983 int nTab; /* Number of previously allocated VDBE cursors */
drh19a775c2000-06-05 18:54:46 +0000984 int nMem; /* Number of memory cells used so far */
drhfef52082000-06-06 01:50:43 +0000985 int nSet; /* Number of sets used so far */
drh22827922000-06-06 17:27:05 +0000986 int nAgg; /* Number of aggregate expressions */
drh7c972de2003-09-06 22:18:07 +0000987 int nVar; /* Number of '?' variables seen in the SQL so far */
drh22827922000-06-06 17:27:05 +0000988 AggExpr *aAgg; /* An array of aggregate expressions */
drh5cf590c2003-04-24 01:45:04 +0000989 const char *zAuthContext; /* The 6th parameter to db->xAuth callbacks */
drhf0f258b2003-04-21 18:48:45 +0000990 Trigger *pNewTrigger; /* Trigger under construct by a CREATE TRIGGER */
991 TriggerStack *trigStack; /* Trigger actions being coded */
drh75897232000-05-29 14:26:00 +0000992};
993
danielk1977d99bc932002-05-16 00:13:12 +0000994/*
drh85e20962003-04-25 17:52:11 +0000995** An instance of the following structure can be declared on a stack and used
996** to save the Parse.zAuthContext value so that it can be restored later.
997*/
998struct AuthContext {
999 const char *zAuthContext; /* Put saved Parse.zAuthContext here */
1000 Parse *pParse; /* The Parse structure */
1001};
1002
1003/*
rdcb0c374f2004-02-20 22:53:38 +00001004** Bitfield flags for P2 value in OP_PutIntKey and OP_Delete
1005*/
1006#define OPFLAG_NCHANGE 1 /* Set to update db->nChange */
1007#define OPFLAG_LASTROWID 2 /* Set to update db->lastRowid */
1008#define OPFLAG_CSCHANGE 4 /* Set to update db->csChange */
1009
1010/*
danielk1977d99bc932002-05-16 00:13:12 +00001011 * Each trigger present in the database schema is stored as an instance of
1012 * struct Trigger.
1013 *
1014 * Pointers to instances of struct Trigger are stored in two ways.
1015 * 1. In the "trigHash" hash table (part of the sqlite* that represents the
1016 * database). This allows Trigger structures to be retrieved by name.
1017 * 2. All triggers associated with a single table form a linked list, using the
drhad3cab52002-05-24 02:04:32 +00001018 * pNext member of struct Trigger. A pointer to the first element of the
1019 * linked list is stored as the "pTrigger" member of the associated
1020 * struct Table.
danielk1977d99bc932002-05-16 00:13:12 +00001021 *
drhad3cab52002-05-24 02:04:32 +00001022 * The "step_list" member points to the first element of a linked list
1023 * containing the SQL statements specified as the trigger program.
danielk1977d99bc932002-05-16 00:13:12 +00001024 */
danielk1977c3f9bad2002-05-15 08:30:12 +00001025struct Trigger {
drhdc379452002-05-15 12:45:43 +00001026 char *name; /* The name of the trigger */
1027 char *table; /* The table or view to which the trigger applies */
drhf0f258b2003-04-21 18:48:45 +00001028 u8 iDb; /* Database containing this trigger */
drh79a519c2003-05-17 19:04:03 +00001029 u8 iTabDb; /* Database containing Trigger.table */
drhf0f258b2003-04-21 18:48:45 +00001030 u8 op; /* One of TK_DELETE, TK_UPDATE, TK_INSERT */
1031 u8 tr_tm; /* One of TK_BEFORE, TK_AFTER */
drhdc379452002-05-15 12:45:43 +00001032 Expr *pWhen; /* The WHEN clause of the expresion (may be NULL) */
1033 IdList *pColumns; /* If this is an UPDATE OF <column-list> trigger,
danielk1977d99bc932002-05-16 00:13:12 +00001034 the <column-list> is stored here */
drhdc379452002-05-15 12:45:43 +00001035 int foreach; /* One of TK_ROW or TK_STATEMENT */
drh4312db52003-06-03 01:47:11 +00001036 Token nameToken; /* Token containing zName. Use during parsing only */
danielk1977c3f9bad2002-05-15 08:30:12 +00001037
drhdc379452002-05-15 12:45:43 +00001038 TriggerStep *step_list; /* Link list of trigger program steps */
drhdc379452002-05-15 12:45:43 +00001039 Trigger *pNext; /* Next trigger associated with the table */
danielk1977c3f9bad2002-05-15 08:30:12 +00001040};
1041
danielk1977d99bc932002-05-16 00:13:12 +00001042/*
1043 * An instance of struct TriggerStep is used to store a single SQL statement
1044 * that is a part of a trigger-program.
1045 *
1046 * Instances of struct TriggerStep are stored in a singly linked list (linked
1047 * using the "pNext" member) referenced by the "step_list" member of the
1048 * associated struct Trigger instance. The first element of the linked list is
1049 * the first step of the trigger-program.
1050 *
1051 * The "op" member indicates whether this is a "DELETE", "INSERT", "UPDATE" or
1052 * "SELECT" statement. The meanings of the other members is determined by the
1053 * value of "op" as follows:
1054 *
1055 * (op == TK_INSERT)
1056 * orconf -> stores the ON CONFLICT algorithm
1057 * pSelect -> If this is an INSERT INTO ... SELECT ... statement, then
1058 * this stores a pointer to the SELECT statement. Otherwise NULL.
1059 * target -> A token holding the name of the table to insert into.
1060 * pExprList -> If this is an INSERT INTO ... VALUES ... statement, then
1061 * this stores values to be inserted. Otherwise NULL.
1062 * pIdList -> If this is an INSERT INTO ... (<column-names>) VALUES ...
drhad3cab52002-05-24 02:04:32 +00001063 * statement, then this stores the column-names to be
1064 * inserted into.
danielk1977d99bc932002-05-16 00:13:12 +00001065 *
1066 * (op == TK_DELETE)
1067 * target -> A token holding the name of the table to delete from.
1068 * pWhere -> The WHERE clause of the DELETE statement if one is specified.
1069 * Otherwise NULL.
1070 *
1071 * (op == TK_UPDATE)
1072 * target -> A token holding the name of the table to update rows of.
1073 * pWhere -> The WHERE clause of the UPDATE statement if one is specified.
1074 * Otherwise NULL.
1075 * pExprList -> A list of the columns to update and the expressions to update
danielk19774adee202004-05-08 08:23:19 +00001076 * them to. See sqlite3Update() documentation of "pChanges"
drhad3cab52002-05-24 02:04:32 +00001077 * argument.
danielk1977d99bc932002-05-16 00:13:12 +00001078 *
1079 */
1080struct TriggerStep {
1081 int op; /* One of TK_DELETE, TK_UPDATE, TK_INSERT, TK_SELECT */
1082 int orconf; /* OE_Rollback etc. */
drha69d9162003-04-17 22:57:53 +00001083 Trigger *pTrig; /* The trigger that this step is a part of */
danielk1977c3f9bad2002-05-15 08:30:12 +00001084
danielk1977d99bc932002-05-16 00:13:12 +00001085 Select *pSelect; /* Valid for SELECT and sometimes
1086 INSERT steps (when pExprList == 0) */
1087 Token target; /* Valid for DELETE, UPDATE, INSERT steps */
1088 Expr *pWhere; /* Valid for DELETE, UPDATE steps */
1089 ExprList *pExprList; /* Valid for UPDATE statements and sometimes
1090 INSERT steps (when pSelect == 0) */
1091 IdList *pIdList; /* Valid for INSERT statements only */
1092
1093 TriggerStep * pNext; /* Next in the link-list */
1094};
1095
1096/*
1097 * An instance of struct TriggerStack stores information required during code
1098 * generation of a single trigger program. While the trigger program is being
1099 * coded, its associated TriggerStack instance is pointed to by the
1100 * "pTriggerStack" member of the Parse structure.
1101 *
1102 * The pTab member points to the table that triggers are being coded on. The
1103 * newIdx member contains the index of the vdbe cursor that points at the temp
1104 * table that stores the new.* references. If new.* references are not valid
1105 * for the trigger being coded (for example an ON DELETE trigger), then newIdx
1106 * is set to -1. The oldIdx member is analogous to newIdx, for old.* references.
1107 *
1108 * The ON CONFLICT policy to be used for the trigger program steps is stored
1109 * as the orconf member. If this is OE_Default, then the ON CONFLICT clause
1110 * specified for individual triggers steps is used.
1111 *
1112 * struct TriggerStack has a "pNext" member, to allow linked lists to be
1113 * constructed. When coding nested triggers (triggers fired by other triggers)
1114 * each nested trigger stores its parent trigger's TriggerStack as the "pNext"
1115 * pointer. Once the nested trigger has been coded, the pNext value is restored
1116 * to the pTriggerStack member of the Parse stucture and coding of the parent
1117 * trigger continues.
1118 *
1119 * Before a nested trigger is coded, the linked list pointed to by the
1120 * pTriggerStack is scanned to ensure that the trigger is not about to be coded
1121 * recursively. If this condition is detected, the nested trigger is not coded.
1122 */
1123struct TriggerStack {
1124 Table *pTab; /* Table that triggers are currently being coded on */
1125 int newIdx; /* Index of vdbe cursor to "new" temp table */
1126 int oldIdx; /* Index of vdbe cursor to "old" temp table */
1127 int orconf; /* Current orconf policy */
danielk19776f349032002-06-11 02:25:40 +00001128 int ignoreJump; /* where to jump to for a RAISE(IGNORE) */
drhe22a3342003-04-22 20:30:37 +00001129 Trigger *pTrigger; /* The trigger currently being coded */
1130 TriggerStack *pNext; /* Next trigger down on the trigger stack */
danielk1977d99bc932002-05-16 00:13:12 +00001131};
1132
1133/*
drhf26e09c2003-05-31 16:21:12 +00001134** The following structure contains information used by the sqliteFix...
1135** routines as they walk the parse tree to make database references
1136** explicit.
1137*/
1138typedef struct DbFixer DbFixer;
1139struct DbFixer {
1140 Parse *pParse; /* The parsing context. Error messages written here */
1141 const char *zDb; /* Make sure all objects are contained in this database */
1142 const char *zType; /* Type of the container - used for error messages */
1143 const Token *pName; /* Name of the container - used for error messages */
1144};
1145
1146/*
danielk1977d99bc932002-05-16 00:13:12 +00001147 * This global flag is set for performance testing of triggers. When it is set
1148 * SQLite will perform the overhead of building new and old trigger references
1149 * even when no triggers exist
1150 */
1151extern int always_code_trigger_setup;
danielk1977c3f9bad2002-05-15 08:30:12 +00001152
drh75897232000-05-29 14:26:00 +00001153/*
1154** Internal function prototypes
1155*/
danielk19774adee202004-05-08 08:23:19 +00001156int sqlite3StrICmp(const char *, const char *);
1157int sqlite3StrNICmp(const char *, const char *, int);
1158int sqlite3HashNoCase(const char *, int);
danielk19778a6b5412004-05-24 07:04:25 +00001159int sqlite3IsNumber(const char*, int*, u8);
danielk19774adee202004-05-08 08:23:19 +00001160int sqlite3Compare(const char *, const char *);
1161int sqlite3SortCompare(const char *, const char *);
1162void sqlite3RealToSortable(double r, char *);
drhdcc581c2000-05-30 13:44:19 +00001163#ifdef MEMORY_DEBUG
danielk19774adee202004-05-08 08:23:19 +00001164 void *sqlite3Malloc_(int,int,char*,int);
1165 void sqlite3Free_(void*,char*,int);
1166 void *sqlite3Realloc_(void*,int,char*,int);
1167 char *sqlite3StrDup_(const char*,char*,int);
1168 char *sqlite3StrNDup_(const char*, int,char*,int);
1169 void sqlite3CheckMemory(void*,int);
drhdcc581c2000-05-30 13:44:19 +00001170#else
1171 void *sqliteMalloc(int);
drh8c1238a2003-01-02 14:43:55 +00001172 void *sqliteMallocRaw(int);
drhdcc581c2000-05-30 13:44:19 +00001173 void sqliteFree(void*);
1174 void *sqliteRealloc(void*,int);
drh6e142f52000-06-08 13:36:40 +00001175 char *sqliteStrDup(const char*);
1176 char *sqliteStrNDup(const char*, int);
danielk19774adee202004-05-08 08:23:19 +00001177# define sqlite3CheckMemory(a,b)
drhdcc581c2000-05-30 13:44:19 +00001178#endif
danielk19774adee202004-05-08 08:23:19 +00001179char *sqlite3MPrintf(const char*, ...);
1180char *sqlite3VMPrintf(const char*, va_list);
1181void sqlite3SetString(char **, const char *, ...);
1182void sqlite3SetNString(char **, ...);
1183void sqlite3ErrorMsg(Parse*, const char*, ...);
1184void sqlite3Dequote(char*);
1185int sqlite3KeywordCode(const char*, int);
1186int sqlite3RunParser(Parse*, const char*, char **);
1187void sqlite3Exec(Parse*);
1188Expr *sqlite3Expr(int, Expr*, Expr*, Token*);
1189void sqlite3ExprSpan(Expr*,Token*,Token*);
1190Expr *sqlite3ExprFunction(ExprList*, Token*);
1191void sqlite3ExprDelete(Expr*);
1192ExprList *sqlite3ExprListAppend(ExprList*,Expr*,Token*);
1193void sqlite3ExprListDelete(ExprList*);
1194int sqlite3Init(sqlite*, char**);
1195void sqlite3Pragma(Parse*,Token*,Token*,int);
1196void sqlite3ResetInternalSchema(sqlite*, int);
1197void sqlite3BeginParse(Parse*,int);
1198void sqlite3RollbackInternalChanges(sqlite*);
1199void sqlite3CommitInternalChanges(sqlite*);
1200Table *sqlite3ResultSetOfSelect(Parse*,char*,Select*);
1201void sqlite3OpenMasterTable(Vdbe *v, int);
danielk1977cbb18d22004-05-28 11:37:27 +00001202void sqlite3StartTable(Parse*,Token*,Token*,Token*,int,int);
danielk19774adee202004-05-08 08:23:19 +00001203void sqlite3AddColumn(Parse*,Token*);
1204void sqlite3AddNotNull(Parse*, int);
1205void sqlite3AddPrimaryKey(Parse*, IdList*, int);
1206void sqlite3AddColumnType(Parse*,Token*,Token*);
1207void sqlite3AddDefaultValue(Parse*,Token*,int);
drhd3d39e92004-05-20 22:16:29 +00001208void sqlite3AddCollateType(Parse*, const char*, int);
1209CollSeq *sqlite3ChangeCollatingFunction(sqlite*,const char*,int,
1210 void*, int(*)(void*,int,const void*,int,const void*));
danielk19774adee202004-05-08 08:23:19 +00001211void sqlite3EndTable(Parse*,Token*,Select*);
danielk197748dec7e2004-05-28 12:33:30 +00001212void sqlite3CreateView(Parse*,Token*,Token*,Token*,Select*,int);
danielk19774adee202004-05-08 08:23:19 +00001213int sqlite3ViewGetColumnNames(Parse*,Table*);
danielk1977a8858102004-05-28 12:11:21 +00001214void sqlite3DropTable(Parse*, SrcList*, int);
danielk19774adee202004-05-08 08:23:19 +00001215void sqlite3DeleteTable(sqlite*, Table*);
1216void sqlite3Insert(Parse*, SrcList*, ExprList*, Select*, IdList*, int);
1217IdList *sqlite3IdListAppend(IdList*, Token*);
1218int sqlite3IdListIndex(IdList*,const char*);
1219SrcList *sqlite3SrcListAppend(SrcList*, Token*, Token*);
1220void sqlite3SrcListAddAlias(SrcList*, Token*);
1221void sqlite3SrcListAssignCursors(Parse*, SrcList*);
1222void sqlite3IdListDelete(IdList*);
1223void sqlite3SrcListDelete(SrcList*);
danielk1977ef2cb632004-05-29 02:37:19 +00001224void sqlite3CreateIndex(Parse*,Token*,Token*,SrcList*,IdList*,int,Token*,
1225 Token*);
danielk19774adee202004-05-08 08:23:19 +00001226void sqlite3DropIndex(Parse*, SrcList*);
1227void sqlite3AddKeyType(Vdbe*, ExprList*);
1228void sqlite3AddIdxKeyType(Vdbe*, Index*);
danielk1977bf3b7212004-05-18 10:06:24 +00001229int sqlite3Select(Parse*, Select*, int, int, Select*, int, int*, char *aff);
danielk19774adee202004-05-08 08:23:19 +00001230Select *sqlite3SelectNew(ExprList*,SrcList*,Expr*,ExprList*,Expr*,ExprList*,
drh9bbca4c2001-11-06 04:00:18 +00001231 int,int,int);
danielk19774adee202004-05-08 08:23:19 +00001232void sqlite3SelectDelete(Select*);
1233void sqlite3SelectUnbind(Select*);
1234Table *sqlite3SrcListLookup(Parse*, SrcList*);
1235int sqlite3IsReadOnly(Parse*, Table*, int);
1236void sqlite3DeleteFrom(Parse*, SrcList*, Expr*);
1237void sqlite3Update(Parse*, SrcList*, ExprList*, Expr*, int);
1238WhereInfo *sqlite3WhereBegin(Parse*, SrcList*, Expr*, int, ExprList**);
1239void sqlite3WhereEnd(WhereInfo*);
1240void sqlite3ExprCode(Parse*, Expr*);
drhf9b596e2004-05-26 16:54:42 +00001241int sqlite3ExprCodeExprList(Parse*, ExprList*);
danielk19774adee202004-05-08 08:23:19 +00001242void sqlite3ExprIfTrue(Parse*, Expr*, int, int);
1243void sqlite3ExprIfFalse(Parse*, Expr*, int, int);
1244Table *sqlite3FindTable(sqlite*,const char*, const char*);
1245Table *sqlite3LocateTable(Parse*,const char*, const char*);
1246Index *sqlite3FindIndex(sqlite*,const char*, const char*);
1247void sqlite3UnlinkAndDeleteIndex(sqlite*,Index*);
danielk19774adee202004-05-08 08:23:19 +00001248void sqlite3Vacuum(Parse*, Token*);
1249int sqlite3RunVacuum(char**, sqlite*);
1250int sqlite3GlobCompare(const unsigned char*,const unsigned char*);
1251int sqlite3LikeCompare(const unsigned char*,const unsigned char*);
1252char *sqlite3TableNameFromToken(Token*);
1253int sqlite3ExprCheck(Parse*, Expr*, int, int*);
1254int sqlite3ExprType(Expr*);
1255int sqlite3ExprCompare(Expr*, Expr*);
drhcce7d172000-05-31 15:34:51 +00001256int sqliteFuncId(Token*);
danielk19774adee202004-05-08 08:23:19 +00001257int sqlite3ExprResolveIds(Parse*, SrcList*, ExprList*, Expr*);
1258int sqlite3ExprAnalyzeAggregates(Parse*, Expr*);
1259Vdbe *sqlite3GetVdbe(Parse*);
1260void sqlite3Randomness(int, void*);
1261void sqlite3RollbackAll(sqlite*);
1262void sqlite3CodeVerifySchema(Parse*, int);
1263void sqlite3BeginTransaction(Parse*, int);
1264void sqlite3CommitTransaction(Parse*);
1265void sqlite3RollbackTransaction(Parse*);
1266int sqlite3ExprIsConstant(Expr*);
1267int sqlite3ExprIsInteger(Expr*, int*);
1268int sqlite3IsRowid(const char*);
1269void sqlite3GenerateRowDelete(sqlite*, Vdbe*, Table*, int, int);
1270void sqlite3GenerateRowIndexDelete(sqlite*, Vdbe*, Table*, int, char*);
drh51846b52004-05-28 16:00:21 +00001271void sqlite3GenerateIndexKey(Vdbe*, Index*, int);
danielk19774adee202004-05-08 08:23:19 +00001272void sqlite3GenerateConstraintChecks(Parse*,Table*,int,char*,int,int,int,int);
1273void sqlite3CompleteInsertion(Parse*, Table*, int, char*, int, int, int);
1274int sqlite3OpenTableAndIndices(Parse*, Table*, int);
1275void sqlite3BeginWriteOperation(Parse*, int, int);
1276void sqlite3EndWriteOperation(Parse*);
1277Expr *sqlite3ExprDup(Expr*);
1278void sqlite3TokenCopy(Token*, Token*);
1279ExprList *sqlite3ExprListDup(ExprList*);
1280SrcList *sqlite3SrcListDup(SrcList*);
1281IdList *sqlite3IdListDup(IdList*);
1282Select *sqlite3SelectDup(Select*);
1283FuncDef *sqlite3FindFunction(sqlite*,const char*,int,int,int);
1284void sqlite3RegisterBuiltinFunctions(sqlite*);
1285void sqlite3RegisterDateTimeFunctions(sqlite*);
1286int sqlite3SafetyOn(sqlite*);
1287int sqlite3SafetyOff(sqlite*);
1288int sqlite3SafetyCheck(sqlite*);
danielk1977cbb18d22004-05-28 11:37:27 +00001289void sqlite3ChangeCookie(sqlite*, Vdbe*, int);
danielk1977ef2cb632004-05-29 02:37:19 +00001290void sqlite3BeginTrigger(Parse*, Token*,Token*,int,int,IdList*,SrcList*,
1291 int,Expr*,int);
danielk19774adee202004-05-08 08:23:19 +00001292void sqlite3FinishTrigger(Parse*, TriggerStep*, Token*);
1293void sqlite3DropTrigger(Parse*, SrcList*);
1294void sqlite3DropTriggerPtr(Parse*, Trigger*, int);
1295int sqlite3TriggersExist(Parse* , Trigger* , int , int , int, ExprList*);
1296int sqlite3CodeRowTrigger(Parse*, int, ExprList*, int, Table *, int, int,
danielk19776f349032002-06-11 02:25:40 +00001297 int, int);
drhdc379452002-05-15 12:45:43 +00001298void sqliteViewTriggers(Parse*, Table*, Expr*, int, ExprList*);
danielk19774adee202004-05-08 08:23:19 +00001299void sqlite3DeleteTriggerStep(TriggerStep*);
1300TriggerStep *sqlite3TriggerSelectStep(Select*);
1301TriggerStep *sqlite3TriggerInsertStep(Token*, IdList*, ExprList*, Select*, int);
1302TriggerStep *sqlite3TriggerUpdateStep(Token*, ExprList*, Expr*, int);
1303TriggerStep *sqlite3TriggerDeleteStep(Token*, Expr*);
1304void sqlite3DeleteTrigger(Trigger*);
1305int sqlite3JoinType(Parse*, Token*, Token*, Token*);
1306void sqlite3CreateForeignKey(Parse*, IdList*, Token*, IdList*, int);
1307void sqlite3DeferForeignKey(Parse*, int);
drhed6c8672003-01-12 18:02:16 +00001308#ifndef SQLITE_OMIT_AUTHORIZATION
danielk19774adee202004-05-08 08:23:19 +00001309 void sqlite3AuthRead(Parse*,Expr*,SrcList*);
1310 int sqlite3AuthCheck(Parse*,int, const char*, const char*, const char*);
1311 void sqlite3AuthContextPush(Parse*, AuthContext*, const char*);
1312 void sqlite3AuthContextPop(AuthContext*);
drhed6c8672003-01-12 18:02:16 +00001313#else
danielk19774adee202004-05-08 08:23:19 +00001314# define sqlite3AuthRead(a,b,c)
1315# define sqlite3AuthCheck(a,b,c,d,e) SQLITE_OK
1316# define sqlite3AuthContextPush(a,b,c)
1317# define sqlite3AuthContextPop(a) ((void)(a))
drhed6c8672003-01-12 18:02:16 +00001318#endif
danielk19774adee202004-05-08 08:23:19 +00001319void sqlite3Attach(Parse*, Token*, Token*, Token*);
1320void sqlite3Detach(Parse*, Token*);
1321int sqlite3BtreeFactory(const sqlite *db, const char *zFilename,
drhbb07e9a2003-04-16 02:17:35 +00001322 int mode, int nPg, Btree **ppBtree);
danielk19774adee202004-05-08 08:23:19 +00001323int sqlite3FixInit(DbFixer*, Parse*, int, const char*, const Token*);
1324int sqlite3FixSrcList(DbFixer*, SrcList*);
1325int sqlite3FixSelect(DbFixer*, Select*);
1326int sqlite3FixExpr(DbFixer*, Expr*);
1327int sqlite3FixExprList(DbFixer*, ExprList*);
1328int sqlite3FixTriggerStep(DbFixer*, TriggerStep*);
1329double sqlite3AtoF(const char *z, const char **);
danielk19776f8a5032004-05-10 10:34:51 +00001330char *sqlite3_snprintf(int,char*,const char*,...);
drhfec19aa2004-05-19 20:41:03 +00001331int sqlite3GetInt32(const char *, int*);
1332int sqlite3GetInt64(const char *, i64*);
1333int sqlite3FitsIn64Bits(const char *);
danielk1977b1bc9532004-05-22 03:05:33 +00001334unsigned char *sqlite3utf16to8(const void *pData, int N, int big_endian);
danielk1977998b56c2004-05-06 23:37:52 +00001335void *sqlite3utf8to16be(const unsigned char *pIn, int N);
1336void *sqlite3utf8to16le(const unsigned char *pIn, int N);
1337void sqlite3utf16to16le(void *pData, int N);
1338void sqlite3utf16to16be(void *pData, int N);
danielk19776622cce2004-05-20 11:00:52 +00001339int sqlite3utf16ByteLen(const void *pData, int nChar);
1340int sqlite3utf8CharLen(const char *pData, int nByte);
danielk1977192ac1d2004-05-10 07:17:30 +00001341int sqlite3PutVarint(unsigned char *, u64);
danielk197790e4d952004-05-10 10:05:53 +00001342int sqlite3GetVarint(const unsigned char *, u64 *);
drh6d2fb152004-05-14 16:50:06 +00001343int sqlite3GetVarint32(const unsigned char *, u32 *);
danielk1977192ac1d2004-05-10 07:17:30 +00001344int sqlite3VarintLen(u64 v);
danielk1977a37cdde2004-05-16 11:15:36 +00001345char sqlite3AffinityType(const char *, int);
1346void sqlite3IndexAffinityStr(Vdbe *, Index *);
1347void sqlite3TableAffinityStr(Vdbe *, Table *);
danielk1977e014a832004-05-17 10:48:57 +00001348char sqlite3CompareAffinity(Expr *pExpr, char aff2);
1349char const *sqlite3AffinityString(char affinity);
1350int sqlite3IndexAffinityOk(Expr *pExpr, char idx_affinity);
danielk1977bf3b7212004-05-18 10:06:24 +00001351char sqlite3ExprAffinity(Expr *pExpr);
drheb2e1762004-05-27 01:53:56 +00001352int sqlite3atoi64(const char*, i64*);
danielk19776622cce2004-05-20 11:00:52 +00001353void sqlite3Error(sqlite *, int, const char*,...);
danielk1977b1bc9532004-05-22 03:05:33 +00001354int sqlite3utfTranslate(const void *, int , u8 , void **, int *, u8);
danielk197793d46752004-05-23 13:30:58 +00001355u8 sqlite3UtfReadBom(const void *zData, int nData);
danielk1977cbb18d22004-05-28 11:37:27 +00001356void *sqlite3HexToBlob(const char *z);
danielk1977ef2cb632004-05-29 02:37:19 +00001357int sqlite3TwoPartName(Parse *, Token *, Token *, Token **);