1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/extensions/sqlite/sqlite-source/sqliteInt.h Sun Mar 30 07:00:22 2008 +0000
1.3 @@ -0,0 +1,1972 @@
1.4 +/*
1.5 +** 2001 September 15
1.6 +**
1.7 +** The author disclaims copyright to this source code. In place of
1.8 +** a legal notice, here is a blessing:
1.9 +**
1.10 +** May you do good and not evil.
1.11 +** May you find forgiveness for yourself and forgive others.
1.12 +** May you share freely, never taking more than you give.
1.13 +**
1.14 +*************************************************************************
1.15 +** Internal interface definitions for SQLite.
1.16 +**
1.17 +** @(#) $Id$
1.18 +*/
1.19 +#ifndef _SQLITEINT_H_
1.20 +#define _SQLITEINT_H_
1.21 +#include "sqliteLimit.h"
1.22 +
1.23 +/*
1.24 +** For testing purposes, the various size limit constants are really
1.25 +** variables that we can modify in the testfixture.
1.26 +*/
1.27 +#ifdef SQLITE_TEST
1.28 + #undef SQLITE_MAX_LENGTH
1.29 + #undef SQLITE_MAX_COLUMN
1.30 + #undef SQLITE_MAX_SQL_LENGTH
1.31 + #undef SQLITE_MAX_EXPR_DEPTH
1.32 + #undef SQLITE_MAX_COMPOUND_SELECT
1.33 + #undef SQLITE_MAX_VDBE_OP
1.34 + #undef SQLITE_MAX_FUNCTION_ARG
1.35 + #undef SQLITE_MAX_VARIABLE_NUMBER
1.36 + #undef SQLITE_MAX_PAGE_SIZE
1.37 + #undef SQLITE_MAX_PAGE_COUNT
1.38 + #undef SQLITE_MAX_LIKE_PATTERN_LENGTH
1.39 +
1.40 + #define SQLITE_MAX_LENGTH sqlite3MAX_LENGTH
1.41 + #define SQLITE_MAX_COLUMN sqlite3MAX_COLUMN
1.42 + #define SQLITE_MAX_SQL_LENGTH sqlite3MAX_SQL_LENGTH
1.43 + #define SQLITE_MAX_EXPR_DEPTH sqlite3MAX_EXPR_DEPTH
1.44 + #define SQLITE_MAX_COMPOUND_SELECT sqlite3MAX_COMPOUND_SELECT
1.45 + #define SQLITE_MAX_VDBE_OP sqlite3MAX_VDBE_OP
1.46 + #define SQLITE_MAX_FUNCTION_ARG sqlite3MAX_FUNCTION_ARG
1.47 + #define SQLITE_MAX_VARIABLE_NUMBER sqlite3MAX_VARIABLE_NUMBER
1.48 + #define SQLITE_MAX_PAGE_SIZE sqlite3MAX_PAGE_SIZE
1.49 + #define SQLITE_MAX_PAGE_COUNT sqlite3MAX_PAGE_COUNT
1.50 + #define SQLITE_MAX_LIKE_PATTERN_LENGTH sqlite3MAX_LIKE_PATTERN_LENGTH
1.51 +
1.52 + extern int sqlite3MAX_LENGTH;
1.53 + extern int sqlite3MAX_COLUMN;
1.54 + extern int sqlite3MAX_SQL_LENGTH;
1.55 + extern int sqlite3MAX_EXPR_DEPTH;
1.56 + extern int sqlite3MAX_COMPOUND_SELECT;
1.57 + extern int sqlite3MAX_VDBE_OP;
1.58 + extern int sqlite3MAX_FUNCTION_ARG;
1.59 + extern int sqlite3MAX_VARIABLE_NUMBER;
1.60 + extern int sqlite3MAX_PAGE_SIZE;
1.61 + extern int sqlite3MAX_PAGE_COUNT;
1.62 + extern int sqlite3MAX_LIKE_PATTERN_LENGTH;
1.63 +#endif
1.64 +
1.65 +
1.66 +/*
1.67 +** The SQLITE_THREADSAFE macro must be defined as either 0 or 1.
1.68 +** Older versions of SQLite used an optional THREADSAFE macro.
1.69 +** We support that for legacy
1.70 +*/
1.71 +#if !defined(SQLITE_THREADSAFE)
1.72 +#if defined(THREADSAFE)
1.73 +# define SQLITE_THREADSAFE THREADSAFE
1.74 +#else
1.75 +# define SQLITE_THREADSAFE 1
1.76 +#endif
1.77 +#endif
1.78 +
1.79 +/*
1.80 +** We need to define _XOPEN_SOURCE as follows in order to enable
1.81 +** recursive mutexes on most unix systems. But Mac OS X is different.
1.82 +** The _XOPEN_SOURCE define causes problems for Mac OS X we are told,
1.83 +** so it is omitted there. See ticket #2673.
1.84 +**
1.85 +** Later we learn that _XOPEN_SOURCE is poorly or incorrectly
1.86 +** implemented on some systems. So we avoid defining it at all
1.87 +** if it is already defined or if it is unneeded because we are
1.88 +** not doing a threadsafe build. Ticket #2681.
1.89 +*/
1.90 +#if !defined(_XOPEN_SOURCE) && !defined(__MACOS__) && SQLITE_THREADSAFE
1.91 +# define _XOPEN_SOURCE 500 /* Needed to enable pthread recursive mutexes */
1.92 +#endif
1.93 +
1.94 +#if defined(SQLITE_TCL) || defined(TCLSH)
1.95 +# include <tcl.h>
1.96 +#endif
1.97 +
1.98 +/*
1.99 +** Many people are failing to set -DNDEBUG=1 when compiling SQLite.
1.100 +** Setting NDEBUG makes the code smaller and run faster. So the following
1.101 +** lines are added to automatically set NDEBUG unless the -DSQLITE_DEBUG=1
1.102 +** option is set. Thus NDEBUG becomes an opt-in rather than an opt-out
1.103 +** feature.
1.104 +*/
1.105 +#if !defined(NDEBUG) && !defined(SQLITE_DEBUG)
1.106 +# define NDEBUG 1
1.107 +#endif
1.108 +
1.109 +/*
1.110 +** These #defines should enable >2GB file support on Posix if the
1.111 +** underlying operating system supports it. If the OS lacks
1.112 +** large file support, or if the OS is windows, these should be no-ops.
1.113 +**
1.114 +** Large file support can be disabled using the -DSQLITE_DISABLE_LFS switch
1.115 +** on the compiler command line. This is necessary if you are compiling
1.116 +** on a recent machine (ex: RedHat 7.2) but you want your code to work
1.117 +** on an older machine (ex: RedHat 6.0). If you compile on RedHat 7.2
1.118 +** without this option, LFS is enable. But LFS does not exist in the kernel
1.119 +** in RedHat 6.0, so the code won't work. Hence, for maximum binary
1.120 +** portability you should omit LFS.
1.121 +**
1.122 +** Similar is true for MacOS. LFS is only supported on MacOS 9 and later.
1.123 +*/
1.124 +#ifndef SQLITE_DISABLE_LFS
1.125 +# define _LARGE_FILE 1
1.126 +# ifndef _FILE_OFFSET_BITS
1.127 +# define _FILE_OFFSET_BITS 64
1.128 +# endif
1.129 +# define _LARGEFILE_SOURCE 1
1.130 +#endif
1.131 +
1.132 +#include "sqlite3.h"
1.133 +#include "hash.h"
1.134 +#include "parse.h"
1.135 +#include <stdio.h>
1.136 +#include <stdlib.h>
1.137 +#include <string.h>
1.138 +#include <assert.h>
1.139 +#include <stddef.h>
1.140 +
1.141 +#define sqlite3_isnan(X) ((X)!=(X))
1.142 +
1.143 +/*
1.144 +** If compiling for a processor that lacks floating point support,
1.145 +** substitute integer for floating-point
1.146 +*/
1.147 +#ifdef SQLITE_OMIT_FLOATING_POINT
1.148 +# define double sqlite_int64
1.149 +# define LONGDOUBLE_TYPE sqlite_int64
1.150 +# ifndef SQLITE_BIG_DBL
1.151 +# define SQLITE_BIG_DBL (0x7fffffffffffffff)
1.152 +# endif
1.153 +# define SQLITE_OMIT_DATETIME_FUNCS 1
1.154 +# define SQLITE_OMIT_TRACE 1
1.155 +# undef SQLITE_MIXED_ENDIAN_64BIT_FLOAT
1.156 +#endif
1.157 +#ifndef SQLITE_BIG_DBL
1.158 +# define SQLITE_BIG_DBL (1e99)
1.159 +#endif
1.160 +
1.161 +/*
1.162 +** OMIT_TEMPDB is set to 1 if SQLITE_OMIT_TEMPDB is defined, or 0
1.163 +** afterward. Having this macro allows us to cause the C compiler
1.164 +** to omit code used by TEMP tables without messy #ifndef statements.
1.165 +*/
1.166 +#ifdef SQLITE_OMIT_TEMPDB
1.167 +#define OMIT_TEMPDB 1
1.168 +#else
1.169 +#define OMIT_TEMPDB 0
1.170 +#endif
1.171 +
1.172 +/*
1.173 +** If the following macro is set to 1, then NULL values are considered
1.174 +** distinct when determining whether or not two entries are the same
1.175 +** in a UNIQUE index. This is the way PostgreSQL, Oracle, DB2, MySQL,
1.176 +** OCELOT, and Firebird all work. The SQL92 spec explicitly says this
1.177 +** is the way things are suppose to work.
1.178 +**
1.179 +** If the following macro is set to 0, the NULLs are indistinct for
1.180 +** a UNIQUE index. In this mode, you can only have a single NULL entry
1.181 +** for a column declared UNIQUE. This is the way Informix and SQL Server
1.182 +** work.
1.183 +*/
1.184 +#define NULL_DISTINCT_FOR_UNIQUE 1
1.185 +
1.186 +/*
1.187 +** The "file format" number is an integer that is incremented whenever
1.188 +** the VDBE-level file format changes. The following macros define the
1.189 +** the default file format for new databases and the maximum file format
1.190 +** that the library can read.
1.191 +*/
1.192 +#define SQLITE_MAX_FILE_FORMAT 4
1.193 +#ifndef SQLITE_DEFAULT_FILE_FORMAT
1.194 +# define SQLITE_DEFAULT_FILE_FORMAT 1
1.195 +#endif
1.196 +
1.197 +/*
1.198 +** Provide a default value for TEMP_STORE in case it is not specified
1.199 +** on the command-line
1.200 +*/
1.201 +#ifndef TEMP_STORE
1.202 +# define TEMP_STORE 1
1.203 +#endif
1.204 +
1.205 +/*
1.206 +** GCC does not define the offsetof() macro so we'll have to do it
1.207 +** ourselves.
1.208 +*/
1.209 +#ifndef offsetof
1.210 +#define offsetof(STRUCTURE,FIELD) ((int)((char*)&((STRUCTURE*)0)->FIELD))
1.211 +#endif
1.212 +
1.213 +/*
1.214 +** Check to see if this machine uses EBCDIC. (Yes, believe it or
1.215 +** not, there are still machines out there that use EBCDIC.)
1.216 +*/
1.217 +#if 'A' == '\301'
1.218 +# define SQLITE_EBCDIC 1
1.219 +#else
1.220 +# define SQLITE_ASCII 1
1.221 +#endif
1.222 +
1.223 +/*
1.224 +** Integers of known sizes. These typedefs might change for architectures
1.225 +** where the sizes very. Preprocessor macros are available so that the
1.226 +** types can be conveniently redefined at compile-type. Like this:
1.227 +**
1.228 +** cc '-DUINTPTR_TYPE=long long int' ...
1.229 +*/
1.230 +#ifndef UINT32_TYPE
1.231 +# define UINT32_TYPE unsigned int
1.232 +#endif
1.233 +#ifndef UINT16_TYPE
1.234 +# define UINT16_TYPE unsigned short int
1.235 +#endif
1.236 +#ifndef INT16_TYPE
1.237 +# define INT16_TYPE short int
1.238 +#endif
1.239 +#ifndef UINT8_TYPE
1.240 +# define UINT8_TYPE unsigned char
1.241 +#endif
1.242 +#ifndef INT8_TYPE
1.243 +# define INT8_TYPE signed char
1.244 +#endif
1.245 +#ifndef LONGDOUBLE_TYPE
1.246 +# define LONGDOUBLE_TYPE long double
1.247 +#endif
1.248 +typedef sqlite_int64 i64; /* 8-byte signed integer */
1.249 +typedef sqlite_uint64 u64; /* 8-byte unsigned integer */
1.250 +typedef UINT32_TYPE u32; /* 4-byte unsigned integer */
1.251 +typedef UINT16_TYPE u16; /* 2-byte unsigned integer */
1.252 +typedef INT16_TYPE i16; /* 2-byte signed integer */
1.253 +typedef UINT8_TYPE u8; /* 1-byte unsigned integer */
1.254 +typedef UINT8_TYPE i8; /* 1-byte signed integer */
1.255 +
1.256 +/*
1.257 +** Macros to determine whether the machine is big or little endian,
1.258 +** evaluated at runtime.
1.259 +*/
1.260 +#ifdef SQLITE_AMALGAMATION
1.261 +const int sqlite3One;
1.262 +#else
1.263 +extern const int sqlite3one;
1.264 +#endif
1.265 +#if defined(i386) || defined(__i386__) || defined(_M_IX86)
1.266 +# define SQLITE_BIGENDIAN 0
1.267 +# define SQLITE_LITTLEENDIAN 1
1.268 +# define SQLITE_UTF16NATIVE SQLITE_UTF16LE
1.269 +#else
1.270 +# define SQLITE_BIGENDIAN (*(char *)(&sqlite3one)==0)
1.271 +# define SQLITE_LITTLEENDIAN (*(char *)(&sqlite3one)==1)
1.272 +# define SQLITE_UTF16NATIVE (SQLITE_BIGENDIAN?SQLITE_UTF16BE:SQLITE_UTF16LE)
1.273 +#endif
1.274 +
1.275 +/*
1.276 +** An instance of the following structure is used to store the busy-handler
1.277 +** callback for a given sqlite handle.
1.278 +**
1.279 +** The sqlite.busyHandler member of the sqlite struct contains the busy
1.280 +** callback for the database handle. Each pager opened via the sqlite
1.281 +** handle is passed a pointer to sqlite.busyHandler. The busy-handler
1.282 +** callback is currently invoked only from within pager.c.
1.283 +*/
1.284 +typedef struct BusyHandler BusyHandler;
1.285 +struct BusyHandler {
1.286 + int (*xFunc)(void *,int); /* The busy callback */
1.287 + void *pArg; /* First arg to busy callback */
1.288 + int nBusy; /* Incremented with each busy call */
1.289 +};
1.290 +
1.291 +/*
1.292 +** Defer sourcing vdbe.h and btree.h until after the "u8" and
1.293 +** "BusyHandler typedefs.
1.294 +*/
1.295 +#include "btree.h"
1.296 +#include "vdbe.h"
1.297 +#include "pager.h"
1.298 +
1.299 +
1.300 +/*
1.301 +** Name of the master database table. The master database table
1.302 +** is a special table that holds the names and attributes of all
1.303 +** user tables and indices.
1.304 +*/
1.305 +#define MASTER_NAME "sqlite_master"
1.306 +#define TEMP_MASTER_NAME "sqlite_temp_master"
1.307 +
1.308 +/*
1.309 +** The root-page of the master database table.
1.310 +*/
1.311 +#define MASTER_ROOT 1
1.312 +
1.313 +/*
1.314 +** The name of the schema table.
1.315 +*/
1.316 +#define SCHEMA_TABLE(x) ((!OMIT_TEMPDB)&&(x==1)?TEMP_MASTER_NAME:MASTER_NAME)
1.317 +
1.318 +/*
1.319 +** A convenience macro that returns the number of elements in
1.320 +** an array.
1.321 +*/
1.322 +#define ArraySize(X) (sizeof(X)/sizeof(X[0]))
1.323 +
1.324 +/*
1.325 +** Forward references to structures
1.326 +*/
1.327 +typedef struct AggInfo AggInfo;
1.328 +typedef struct AuthContext AuthContext;
1.329 +typedef struct CollSeq CollSeq;
1.330 +typedef struct Column Column;
1.331 +typedef struct Db Db;
1.332 +typedef struct Schema Schema;
1.333 +typedef struct Expr Expr;
1.334 +typedef struct ExprList ExprList;
1.335 +typedef struct FKey FKey;
1.336 +typedef struct FuncDef FuncDef;
1.337 +typedef struct IdList IdList;
1.338 +typedef struct Index Index;
1.339 +typedef struct KeyClass KeyClass;
1.340 +typedef struct KeyInfo KeyInfo;
1.341 +typedef struct Module Module;
1.342 +typedef struct NameContext NameContext;
1.343 +typedef struct Parse Parse;
1.344 +typedef struct Select Select;
1.345 +typedef struct SrcList SrcList;
1.346 +typedef struct Table Table;
1.347 +typedef struct TableLock TableLock;
1.348 +typedef struct Token Token;
1.349 +typedef struct TriggerStack TriggerStack;
1.350 +typedef struct TriggerStep TriggerStep;
1.351 +typedef struct Trigger Trigger;
1.352 +typedef struct WhereInfo WhereInfo;
1.353 +typedef struct WhereLevel WhereLevel;
1.354 +
1.355 +#include "os.h"
1.356 +#include "mutex.h"
1.357 +
1.358 +/*
1.359 +** Each database file to be accessed by the system is an instance
1.360 +** of the following structure. There are normally two of these structures
1.361 +** in the sqlite.aDb[] array. aDb[0] is the main database file and
1.362 +** aDb[1] is the database file used to hold temporary tables. Additional
1.363 +** databases may be attached.
1.364 +*/
1.365 +struct Db {
1.366 + char *zName; /* Name of this database */
1.367 + Btree *pBt; /* The B*Tree structure for this database file */
1.368 + u8 inTrans; /* 0: not writable. 1: Transaction. 2: Checkpoint */
1.369 + u8 safety_level; /* How aggressive at synching data to disk */
1.370 + void *pAux; /* Auxiliary data. Usually NULL */
1.371 + void (*xFreeAux)(void*); /* Routine to free pAux */
1.372 + Schema *pSchema; /* Pointer to database schema (possibly shared) */
1.373 +};
1.374 +
1.375 +/*
1.376 +** An instance of the following structure stores a database schema.
1.377 +**
1.378 +** If there are no virtual tables configured in this schema, the
1.379 +** Schema.db variable is set to NULL. After the first virtual table
1.380 +** has been added, it is set to point to the database connection
1.381 +** used to create the connection. Once a virtual table has been
1.382 +** added to the Schema structure and the Schema.db variable populated,
1.383 +** only that database connection may use the Schema to prepare
1.384 +** statements.
1.385 +*/
1.386 +struct Schema {
1.387 + int schema_cookie; /* Database schema version number for this file */
1.388 + Hash tblHash; /* All tables indexed by name */
1.389 + Hash idxHash; /* All (named) indices indexed by name */
1.390 + Hash trigHash; /* All triggers indexed by name */
1.391 + Hash aFKey; /* Foreign keys indexed by to-table */
1.392 + Table *pSeqTab; /* The sqlite_sequence table used by AUTOINCREMENT */
1.393 + u8 file_format; /* Schema format version for this file */
1.394 + u8 enc; /* Text encoding used by this database */
1.395 + u16 flags; /* Flags associated with this schema */
1.396 + int cache_size; /* Number of pages to use in the cache */
1.397 +#ifndef SQLITE_OMIT_VIRTUALTABLE
1.398 + sqlite3 *db; /* "Owner" connection. See comment above */
1.399 +#endif
1.400 +};
1.401 +
1.402 +/*
1.403 +** These macros can be used to test, set, or clear bits in the
1.404 +** Db.flags field.
1.405 +*/
1.406 +#define DbHasProperty(D,I,P) (((D)->aDb[I].pSchema->flags&(P))==(P))
1.407 +#define DbHasAnyProperty(D,I,P) (((D)->aDb[I].pSchema->flags&(P))!=0)
1.408 +#define DbSetProperty(D,I,P) (D)->aDb[I].pSchema->flags|=(P)
1.409 +#define DbClearProperty(D,I,P) (D)->aDb[I].pSchema->flags&=~(P)
1.410 +
1.411 +/*
1.412 +** Allowed values for the DB.flags field.
1.413 +**
1.414 +** The DB_SchemaLoaded flag is set after the database schema has been
1.415 +** read into internal hash tables.
1.416 +**
1.417 +** DB_UnresetViews means that one or more views have column names that
1.418 +** have been filled out. If the schema changes, these column names might
1.419 +** changes and so the view will need to be reset.
1.420 +*/
1.421 +#define DB_SchemaLoaded 0x0001 /* The schema has been loaded */
1.422 +#define DB_UnresetViews 0x0002 /* Some views have defined column names */
1.423 +#define DB_Empty 0x0004 /* The file is empty (length 0 bytes) */
1.424 +
1.425 +
1.426 +/*
1.427 +** Each database is an instance of the following structure.
1.428 +**
1.429 +** The sqlite.lastRowid records the last insert rowid generated by an
1.430 +** insert statement. Inserts on views do not affect its value. Each
1.431 +** trigger has its own context, so that lastRowid can be updated inside
1.432 +** triggers as usual. The previous value will be restored once the trigger
1.433 +** exits. Upon entering a before or instead of trigger, lastRowid is no
1.434 +** longer (since after version 2.8.12) reset to -1.
1.435 +**
1.436 +** The sqlite.nChange does not count changes within triggers and keeps no
1.437 +** context. It is reset at start of sqlite3_exec.
1.438 +** The sqlite.lsChange represents the number of changes made by the last
1.439 +** insert, update, or delete statement. It remains constant throughout the
1.440 +** length of a statement and is then updated by OP_SetCounts. It keeps a
1.441 +** context stack just like lastRowid so that the count of changes
1.442 +** within a trigger is not seen outside the trigger. Changes to views do not
1.443 +** affect the value of lsChange.
1.444 +** The sqlite.csChange keeps track of the number of current changes (since
1.445 +** the last statement) and is used to update sqlite_lsChange.
1.446 +**
1.447 +** The member variables sqlite.errCode, sqlite.zErrMsg and sqlite.zErrMsg16
1.448 +** store the most recent error code and, if applicable, string. The
1.449 +** internal function sqlite3Error() is used to set these variables
1.450 +** consistently.
1.451 +*/
1.452 +struct sqlite3 {
1.453 + sqlite3_vfs *pVfs; /* OS Interface */
1.454 + int nDb; /* Number of backends currently in use */
1.455 + Db *aDb; /* All backends */
1.456 + int flags; /* Miscellanous flags. See below */
1.457 + int openFlags; /* Flags passed to sqlite3_vfs.xOpen() */
1.458 + int errCode; /* Most recent error code (SQLITE_*) */
1.459 + int errMask; /* & result codes with this before returning */
1.460 + u8 autoCommit; /* The auto-commit flag. */
1.461 + u8 temp_store; /* 1: file 2: memory 0: default */
1.462 + u8 mallocFailed; /* True if we have seen a malloc failure */
1.463 + int nTable; /* Number of tables in the database */
1.464 + CollSeq *pDfltColl; /* The default collating sequence (BINARY) */
1.465 + i64 lastRowid; /* ROWID of most recent insert (see above) */
1.466 + i64 priorNewRowid; /* Last randomly generated ROWID */
1.467 + int magic; /* Magic number for detect library misuse */
1.468 + int nChange; /* Value returned by sqlite3_changes() */
1.469 + int nTotalChange; /* Value returned by sqlite3_total_changes() */
1.470 + sqlite3_mutex *mutex; /* Connection mutex */
1.471 + struct sqlite3InitInfo { /* Information used during initialization */
1.472 + int iDb; /* When back is being initialized */
1.473 + int newTnum; /* Rootpage of table being initialized */
1.474 + u8 busy; /* TRUE if currently initializing */
1.475 + } init;
1.476 + int nExtension; /* Number of loaded extensions */
1.477 + void **aExtension; /* Array of shared libraray handles */
1.478 + struct Vdbe *pVdbe; /* List of active virtual machines */
1.479 + int activeVdbeCnt; /* Number of vdbes currently executing */
1.480 + void (*xTrace)(void*,const char*); /* Trace function */
1.481 + void *pTraceArg; /* Argument to the trace function */
1.482 + void (*xProfile)(void*,const char*,u64); /* Profiling function */
1.483 + void *pProfileArg; /* Argument to profile function */
1.484 + void *pCommitArg; /* Argument to xCommitCallback() */
1.485 + int (*xCommitCallback)(void*); /* Invoked at every commit. */
1.486 + void *pRollbackArg; /* Argument to xRollbackCallback() */
1.487 + void (*xRollbackCallback)(void*); /* Invoked at every commit. */
1.488 + void *pUpdateArg;
1.489 + void (*xUpdateCallback)(void*,int, const char*,const char*,sqlite_int64);
1.490 + void(*xCollNeeded)(void*,sqlite3*,int eTextRep,const char*);
1.491 + void(*xCollNeeded16)(void*,sqlite3*,int eTextRep,const void*);
1.492 + void *pCollNeededArg;
1.493 + sqlite3_value *pErr; /* Most recent error message */
1.494 + char *zErrMsg; /* Most recent error message (UTF-8 encoded) */
1.495 + char *zErrMsg16; /* Most recent error message (UTF-16 encoded) */
1.496 + union {
1.497 + int isInterrupted; /* True if sqlite3_interrupt has been called */
1.498 + double notUsed1; /* Spacer */
1.499 + } u1;
1.500 +#ifndef SQLITE_OMIT_AUTHORIZATION
1.501 + int (*xAuth)(void*,int,const char*,const char*,const char*,const char*);
1.502 + /* Access authorization function */
1.503 + void *pAuthArg; /* 1st argument to the access auth function */
1.504 +#endif
1.505 +#ifndef SQLITE_OMIT_PROGRESS_CALLBACK
1.506 + int (*xProgress)(void *); /* The progress callback */
1.507 + void *pProgressArg; /* Argument to the progress callback */
1.508 + int nProgressOps; /* Number of opcodes for progress callback */
1.509 +#endif
1.510 +#ifndef SQLITE_OMIT_VIRTUALTABLE
1.511 + Hash aModule; /* populated by sqlite3_create_module() */
1.512 + Table *pVTab; /* vtab with active Connect/Create method */
1.513 + sqlite3_vtab **aVTrans; /* Virtual tables with open transactions */
1.514 + int nVTrans; /* Allocated size of aVTrans */
1.515 +#endif
1.516 + Hash aFunc; /* All functions that can be in SQL exprs */
1.517 + Hash aCollSeq; /* All collating sequences */
1.518 + BusyHandler busyHandler; /* Busy callback */
1.519 + int busyTimeout; /* Busy handler timeout, in msec */
1.520 + Db aDbStatic[2]; /* Static space for the 2 default backends */
1.521 +#ifdef SQLITE_SSE
1.522 + sqlite3_stmt *pFetch; /* Used by SSE to fetch stored statements */
1.523 +#endif
1.524 + u8 dfltLockMode; /* Default locking-mode for attached dbs */
1.525 +};
1.526 +
1.527 +/*
1.528 +** A macro to discover the encoding of a database.
1.529 +*/
1.530 +#define ENC(db) ((db)->aDb[0].pSchema->enc)
1.531 +
1.532 +/*
1.533 +** Possible values for the sqlite.flags and or Db.flags fields.
1.534 +**
1.535 +** On sqlite.flags, the SQLITE_InTrans value means that we have
1.536 +** executed a BEGIN. On Db.flags, SQLITE_InTrans means a statement
1.537 +** transaction is active on that particular database file.
1.538 +*/
1.539 +#define SQLITE_VdbeTrace 0x00000001 /* True to trace VDBE execution */
1.540 +#define SQLITE_InTrans 0x00000008 /* True if in a transaction */
1.541 +#define SQLITE_InternChanges 0x00000010 /* Uncommitted Hash table changes */
1.542 +#define SQLITE_FullColNames 0x00000020 /* Show full column names on SELECT */
1.543 +#define SQLITE_ShortColNames 0x00000040 /* Show short columns names */
1.544 +#define SQLITE_CountRows 0x00000080 /* Count rows changed by INSERT, */
1.545 + /* DELETE, or UPDATE and return */
1.546 + /* the count using a callback. */
1.547 +#define SQLITE_NullCallback 0x00000100 /* Invoke the callback once if the */
1.548 + /* result set is empty */
1.549 +#define SQLITE_SqlTrace 0x00000200 /* Debug print SQL as it executes */
1.550 +#define SQLITE_VdbeListing 0x00000400 /* Debug listings of VDBE programs */
1.551 +#define SQLITE_WriteSchema 0x00000800 /* OK to update SQLITE_MASTER */
1.552 +#define SQLITE_NoReadlock 0x00001000 /* Readlocks are omitted when
1.553 + ** accessing read-only databases */
1.554 +#define SQLITE_IgnoreChecks 0x00002000 /* Do not enforce check constraints */
1.555 +#define SQLITE_ReadUncommitted 0x00004000 /* For shared-cache mode */
1.556 +#define SQLITE_LegacyFileFmt 0x00008000 /* Create new databases in format 1 */
1.557 +#define SQLITE_FullFSync 0x00010000 /* Use full fsync on the backend */
1.558 +#define SQLITE_LoadExtension 0x00020000 /* Enable load_extension */
1.559 +
1.560 +#define SQLITE_RecoveryMode 0x00040000 /* Ignore schema errors */
1.561 +#define SQLITE_SharedCache 0x00080000 /* Cache sharing is enabled */
1.562 +#define SQLITE_Vtab 0x00100000 /* There exists a virtual table */
1.563 +
1.564 +/*
1.565 +** Possible values for the sqlite.magic field.
1.566 +** The numbers are obtained at random and have no special meaning, other
1.567 +** than being distinct from one another.
1.568 +*/
1.569 +#define SQLITE_MAGIC_OPEN 0xa029a697 /* Database is open */
1.570 +#define SQLITE_MAGIC_CLOSED 0x9f3c2d33 /* Database is closed */
1.571 +#define SQLITE_MAGIC_BUSY 0xf03b7906 /* Database currently in use */
1.572 +#define SQLITE_MAGIC_ERROR 0xb5357930 /* An SQLITE_MISUSE error occurred */
1.573 +
1.574 +/*
1.575 +** Each SQL function is defined by an instance of the following
1.576 +** structure. A pointer to this structure is stored in the sqlite.aFunc
1.577 +** hash table. When multiple functions have the same name, the hash table
1.578 +** points to a linked list of these structures.
1.579 +*/
1.580 +struct FuncDef {
1.581 + i16 nArg; /* Number of arguments. -1 means unlimited */
1.582 + u8 iPrefEnc; /* Preferred text encoding (SQLITE_UTF8, 16LE, 16BE) */
1.583 + u8 needCollSeq; /* True if sqlite3GetFuncCollSeq() might be called */
1.584 + u8 flags; /* Some combination of SQLITE_FUNC_* */
1.585 + void *pUserData; /* User data parameter */
1.586 + FuncDef *pNext; /* Next function with same name */
1.587 + void (*xFunc)(sqlite3_context*,int,sqlite3_value**); /* Regular function */
1.588 + void (*xStep)(sqlite3_context*,int,sqlite3_value**); /* Aggregate step */
1.589 + void (*xFinalize)(sqlite3_context*); /* Aggregate finializer */
1.590 + char zName[1]; /* SQL name of the function. MUST BE LAST */
1.591 +};
1.592 +
1.593 +/*
1.594 +** Each SQLite module (virtual table definition) is defined by an
1.595 +** instance of the following structure, stored in the sqlite3.aModule
1.596 +** hash table.
1.597 +*/
1.598 +struct Module {
1.599 + const sqlite3_module *pModule; /* Callback pointers */
1.600 + const char *zName; /* Name passed to create_module() */
1.601 + void *pAux; /* pAux passed to create_module() */
1.602 + void (*xDestroy)(void *); /* Module destructor function */
1.603 +};
1.604 +
1.605 +/*
1.606 +** Possible values for FuncDef.flags
1.607 +*/
1.608 +#define SQLITE_FUNC_LIKE 0x01 /* Candidate for the LIKE optimization */
1.609 +#define SQLITE_FUNC_CASE 0x02 /* Case-sensitive LIKE-type function */
1.610 +#define SQLITE_FUNC_EPHEM 0x04 /* Ephermeral. Delete with VDBE */
1.611 +
1.612 +/*
1.613 +** information about each column of an SQL table is held in an instance
1.614 +** of this structure.
1.615 +*/
1.616 +struct Column {
1.617 + char *zName; /* Name of this column */
1.618 + Expr *pDflt; /* Default value of this column */
1.619 + char *zType; /* Data type for this column */
1.620 + char *zColl; /* Collating sequence. If NULL, use the default */
1.621 + u8 notNull; /* True if there is a NOT NULL constraint */
1.622 + u8 isPrimKey; /* True if this column is part of the PRIMARY KEY */
1.623 + char affinity; /* One of the SQLITE_AFF_... values */
1.624 +#ifndef SQLITE_OMIT_VIRTUALTABLE
1.625 + u8 isHidden; /* True if this column is 'hidden' */
1.626 +#endif
1.627 +};
1.628 +
1.629 +/*
1.630 +** A "Collating Sequence" is defined by an instance of the following
1.631 +** structure. Conceptually, a collating sequence consists of a name and
1.632 +** a comparison routine that defines the order of that sequence.
1.633 +**
1.634 +** There may two seperate implementations of the collation function, one
1.635 +** that processes text in UTF-8 encoding (CollSeq.xCmp) and another that
1.636 +** processes text encoded in UTF-16 (CollSeq.xCmp16), using the machine
1.637 +** native byte order. When a collation sequence is invoked, SQLite selects
1.638 +** the version that will require the least expensive encoding
1.639 +** translations, if any.
1.640 +**
1.641 +** The CollSeq.pUser member variable is an extra parameter that passed in
1.642 +** as the first argument to the UTF-8 comparison function, xCmp.
1.643 +** CollSeq.pUser16 is the equivalent for the UTF-16 comparison function,
1.644 +** xCmp16.
1.645 +**
1.646 +** If both CollSeq.xCmp and CollSeq.xCmp16 are NULL, it means that the
1.647 +** collating sequence is undefined. Indices built on an undefined
1.648 +** collating sequence may not be read or written.
1.649 +*/
1.650 +struct CollSeq {
1.651 + char *zName; /* Name of the collating sequence, UTF-8 encoded */
1.652 + u8 enc; /* Text encoding handled by xCmp() */
1.653 + u8 type; /* One of the SQLITE_COLL_... values below */
1.654 + void *pUser; /* First argument to xCmp() */
1.655 + int (*xCmp)(void*,int, const void*, int, const void*);
1.656 + void (*xDel)(void*); /* Destructor for pUser */
1.657 +};
1.658 +
1.659 +/*
1.660 +** Allowed values of CollSeq flags:
1.661 +*/
1.662 +#define SQLITE_COLL_BINARY 1 /* The default memcmp() collating sequence */
1.663 +#define SQLITE_COLL_NOCASE 2 /* The built-in NOCASE collating sequence */
1.664 +#define SQLITE_COLL_REVERSE 3 /* The built-in REVERSE collating sequence */
1.665 +#define SQLITE_COLL_USER 0 /* Any other user-defined collating sequence */
1.666 +
1.667 +/*
1.668 +** A sort order can be either ASC or DESC.
1.669 +*/
1.670 +#define SQLITE_SO_ASC 0 /* Sort in ascending order */
1.671 +#define SQLITE_SO_DESC 1 /* Sort in ascending order */
1.672 +
1.673 +/*
1.674 +** Column affinity types.
1.675 +**
1.676 +** These used to have mnemonic name like 'i' for SQLITE_AFF_INTEGER and
1.677 +** 't' for SQLITE_AFF_TEXT. But we can save a little space and improve
1.678 +** the speed a little by number the values consecutively.
1.679 +**
1.680 +** But rather than start with 0 or 1, we begin with 'a'. That way,
1.681 +** when multiple affinity types are concatenated into a string and
1.682 +** used as the P3 operand, they will be more readable.
1.683 +**
1.684 +** Note also that the numeric types are grouped together so that testing
1.685 +** for a numeric type is a single comparison.
1.686 +*/
1.687 +#define SQLITE_AFF_TEXT 'a'
1.688 +#define SQLITE_AFF_NONE 'b'
1.689 +#define SQLITE_AFF_NUMERIC 'c'
1.690 +#define SQLITE_AFF_INTEGER 'd'
1.691 +#define SQLITE_AFF_REAL 'e'
1.692 +
1.693 +#define sqlite3IsNumericAffinity(X) ((X)>=SQLITE_AFF_NUMERIC)
1.694 +
1.695 +/*
1.696 +** Each SQL table is represented in memory by an instance of the
1.697 +** following structure.
1.698 +**
1.699 +** Table.zName is the name of the table. The case of the original
1.700 +** CREATE TABLE statement is stored, but case is not significant for
1.701 +** comparisons.
1.702 +**
1.703 +** Table.nCol is the number of columns in this table. Table.aCol is a
1.704 +** pointer to an array of Column structures, one for each column.
1.705 +**
1.706 +** If the table has an INTEGER PRIMARY KEY, then Table.iPKey is the index of
1.707 +** the column that is that key. Otherwise Table.iPKey is negative. Note
1.708 +** that the datatype of the PRIMARY KEY must be INTEGER for this field to
1.709 +** be set. An INTEGER PRIMARY KEY is used as the rowid for each row of
1.710 +** the table. If a table has no INTEGER PRIMARY KEY, then a random rowid
1.711 +** is generated for each row of the table. Table.hasPrimKey is true if
1.712 +** the table has any PRIMARY KEY, INTEGER or otherwise.
1.713 +**
1.714 +** Table.tnum is the page number for the root BTree page of the table in the
1.715 +** database file. If Table.iDb is the index of the database table backend
1.716 +** in sqlite.aDb[]. 0 is for the main database and 1 is for the file that
1.717 +** holds temporary tables and indices. If Table.isEphem
1.718 +** is true, then the table is stored in a file that is automatically deleted
1.719 +** when the VDBE cursor to the table is closed. In this case Table.tnum
1.720 +** refers VDBE cursor number that holds the table open, not to the root
1.721 +** page number. Transient tables are used to hold the results of a
1.722 +** sub-query that appears instead of a real table name in the FROM clause
1.723 +** of a SELECT statement.
1.724 +*/
1.725 +struct Table {
1.726 + char *zName; /* Name of the table */
1.727 + int nCol; /* Number of columns in this table */
1.728 + Column *aCol; /* Information about each column */
1.729 + int iPKey; /* If not less then 0, use aCol[iPKey] as the primary key */
1.730 + Index *pIndex; /* List of SQL indexes on this table. */
1.731 + int tnum; /* Root BTree node for this table (see note above) */
1.732 + Select *pSelect; /* NULL for tables. Points to definition if a view. */
1.733 + int nRef; /* Number of pointers to this Table */
1.734 + Trigger *pTrigger; /* List of SQL triggers on this table */
1.735 + FKey *pFKey; /* Linked list of all foreign keys in this table */
1.736 + char *zColAff; /* String defining the affinity of each column */
1.737 +#ifndef SQLITE_OMIT_CHECK
1.738 + Expr *pCheck; /* The AND of all CHECK constraints */
1.739 +#endif
1.740 +#ifndef SQLITE_OMIT_ALTERTABLE
1.741 + int addColOffset; /* Offset in CREATE TABLE statement to add a new column */
1.742 +#endif
1.743 + u8 readOnly; /* True if this table should not be written by the user */
1.744 + u8 isEphem; /* True if created using OP_OpenEphermeral */
1.745 + u8 hasPrimKey; /* True if there exists a primary key */
1.746 + u8 keyConf; /* What to do in case of uniqueness conflict on iPKey */
1.747 + u8 autoInc; /* True if the integer primary key is autoincrement */
1.748 +#ifndef SQLITE_OMIT_VIRTUALTABLE
1.749 + u8 isVirtual; /* True if this is a virtual table */
1.750 + u8 isCommit; /* True once the CREATE TABLE has been committed */
1.751 + Module *pMod; /* Pointer to the implementation of the module */
1.752 + sqlite3_vtab *pVtab; /* Pointer to the module instance */
1.753 + int nModuleArg; /* Number of arguments to the module */
1.754 + char **azModuleArg; /* Text of all module args. [0] is module name */
1.755 +#endif
1.756 + Schema *pSchema; /* Schema that contains this table */
1.757 +};
1.758 +
1.759 +/*
1.760 +** Test to see whether or not a table is a virtual table. This is
1.761 +** done as a macro so that it will be optimized out when virtual
1.762 +** table support is omitted from the build.
1.763 +*/
1.764 +#ifndef SQLITE_OMIT_VIRTUALTABLE
1.765 +# define IsVirtual(X) ((X)->isVirtual)
1.766 +# define IsHiddenColumn(X) ((X)->isHidden)
1.767 +#else
1.768 +# define IsVirtual(X) 0
1.769 +# define IsHiddenColumn(X) 0
1.770 +#endif
1.771 +
1.772 +/*
1.773 +** Each foreign key constraint is an instance of the following structure.
1.774 +**
1.775 +** A foreign key is associated with two tables. The "from" table is
1.776 +** the table that contains the REFERENCES clause that creates the foreign
1.777 +** key. The "to" table is the table that is named in the REFERENCES clause.
1.778 +** Consider this example:
1.779 +**
1.780 +** CREATE TABLE ex1(
1.781 +** a INTEGER PRIMARY KEY,
1.782 +** b INTEGER CONSTRAINT fk1 REFERENCES ex2(x)
1.783 +** );
1.784 +**
1.785 +** For foreign key "fk1", the from-table is "ex1" and the to-table is "ex2".
1.786 +**
1.787 +** Each REFERENCES clause generates an instance of the following structure
1.788 +** which is attached to the from-table. The to-table need not exist when
1.789 +** the from-table is created. The existance of the to-table is not checked
1.790 +** until an attempt is made to insert data into the from-table.
1.791 +**
1.792 +** The sqlite.aFKey hash table stores pointers to this structure
1.793 +** given the name of a to-table. For each to-table, all foreign keys
1.794 +** associated with that table are on a linked list using the FKey.pNextTo
1.795 +** field.
1.796 +*/
1.797 +struct FKey {
1.798 + Table *pFrom; /* The table that constains the REFERENCES clause */
1.799 + FKey *pNextFrom; /* Next foreign key in pFrom */
1.800 + char *zTo; /* Name of table that the key points to */
1.801 + FKey *pNextTo; /* Next foreign key that points to zTo */
1.802 + int nCol; /* Number of columns in this key */
1.803 + struct sColMap { /* Mapping of columns in pFrom to columns in zTo */
1.804 + int iFrom; /* Index of column in pFrom */
1.805 + char *zCol; /* Name of column in zTo. If 0 use PRIMARY KEY */
1.806 + } *aCol; /* One entry for each of nCol column s */
1.807 + u8 isDeferred; /* True if constraint checking is deferred till COMMIT */
1.808 + u8 updateConf; /* How to resolve conflicts that occur on UPDATE */
1.809 + u8 deleteConf; /* How to resolve conflicts that occur on DELETE */
1.810 + u8 insertConf; /* How to resolve conflicts that occur on INSERT */
1.811 +};
1.812 +
1.813 +/*
1.814 +** SQLite supports many different ways to resolve a constraint
1.815 +** error. ROLLBACK processing means that a constraint violation
1.816 +** causes the operation in process to fail and for the current transaction
1.817 +** to be rolled back. ABORT processing means the operation in process
1.818 +** fails and any prior changes from that one operation are backed out,
1.819 +** but the transaction is not rolled back. FAIL processing means that
1.820 +** the operation in progress stops and returns an error code. But prior
1.821 +** changes due to the same operation are not backed out and no rollback
1.822 +** occurs. IGNORE means that the particular row that caused the constraint
1.823 +** error is not inserted or updated. Processing continues and no error
1.824 +** is returned. REPLACE means that preexisting database rows that caused
1.825 +** a UNIQUE constraint violation are removed so that the new insert or
1.826 +** update can proceed. Processing continues and no error is reported.
1.827 +**
1.828 +** RESTRICT, SETNULL, and CASCADE actions apply only to foreign keys.
1.829 +** RESTRICT is the same as ABORT for IMMEDIATE foreign keys and the
1.830 +** same as ROLLBACK for DEFERRED keys. SETNULL means that the foreign
1.831 +** key is set to NULL. CASCADE means that a DELETE or UPDATE of the
1.832 +** referenced table row is propagated into the row that holds the
1.833 +** foreign key.
1.834 +**
1.835 +** The following symbolic values are used to record which type
1.836 +** of action to take.
1.837 +*/
1.838 +#define OE_None 0 /* There is no constraint to check */
1.839 +#define OE_Rollback 1 /* Fail the operation and rollback the transaction */
1.840 +#define OE_Abort 2 /* Back out changes but do no rollback transaction */
1.841 +#define OE_Fail 3 /* Stop the operation but leave all prior changes */
1.842 +#define OE_Ignore 4 /* Ignore the error. Do not do the INSERT or UPDATE */
1.843 +#define OE_Replace 5 /* Delete existing record, then do INSERT or UPDATE */
1.844 +
1.845 +#define OE_Restrict 6 /* OE_Abort for IMMEDIATE, OE_Rollback for DEFERRED */
1.846 +#define OE_SetNull 7 /* Set the foreign key value to NULL */
1.847 +#define OE_SetDflt 8 /* Set the foreign key value to its default */
1.848 +#define OE_Cascade 9 /* Cascade the changes */
1.849 +
1.850 +#define OE_Default 99 /* Do whatever the default action is */
1.851 +
1.852 +
1.853 +/*
1.854 +** An instance of the following structure is passed as the first
1.855 +** argument to sqlite3VdbeKeyCompare and is used to control the
1.856 +** comparison of the two index keys.
1.857 +**
1.858 +** If the KeyInfo.incrKey value is true and the comparison would
1.859 +** otherwise be equal, then return a result as if the second key
1.860 +** were larger.
1.861 +*/
1.862 +struct KeyInfo {
1.863 + sqlite3 *db; /* The database connection */
1.864 + u8 enc; /* Text encoding - one of the TEXT_Utf* values */
1.865 + u8 incrKey; /* Increase 2nd key by epsilon before comparison */
1.866 + int nField; /* Number of entries in aColl[] */
1.867 + u8 *aSortOrder; /* If defined an aSortOrder[i] is true, sort DESC */
1.868 + CollSeq *aColl[1]; /* Collating sequence for each term of the key */
1.869 +};
1.870 +
1.871 +/*
1.872 +** Each SQL index is represented in memory by an
1.873 +** instance of the following structure.
1.874 +**
1.875 +** The columns of the table that are to be indexed are described
1.876 +** by the aiColumn[] field of this structure. For example, suppose
1.877 +** we have the following table and index:
1.878 +**
1.879 +** CREATE TABLE Ex1(c1 int, c2 int, c3 text);
1.880 +** CREATE INDEX Ex2 ON Ex1(c3,c1);
1.881 +**
1.882 +** In the Table structure describing Ex1, nCol==3 because there are
1.883 +** three columns in the table. In the Index structure describing
1.884 +** Ex2, nColumn==2 since 2 of the 3 columns of Ex1 are indexed.
1.885 +** The value of aiColumn is {2, 0}. aiColumn[0]==2 because the
1.886 +** first column to be indexed (c3) has an index of 2 in Ex1.aCol[].
1.887 +** The second column to be indexed (c1) has an index of 0 in
1.888 +** Ex1.aCol[], hence Ex2.aiColumn[1]==0.
1.889 +**
1.890 +** The Index.onError field determines whether or not the indexed columns
1.891 +** must be unique and what to do if they are not. When Index.onError=OE_None,
1.892 +** it means this is not a unique index. Otherwise it is a unique index
1.893 +** and the value of Index.onError indicate the which conflict resolution
1.894 +** algorithm to employ whenever an attempt is made to insert a non-unique
1.895 +** element.
1.896 +*/
1.897 +struct Index {
1.898 + char *zName; /* Name of this index */
1.899 + int nColumn; /* Number of columns in the table used by this index */
1.900 + int *aiColumn; /* Which columns are used by this index. 1st is 0 */
1.901 + unsigned *aiRowEst; /* Result of ANALYZE: Est. rows selected by each column */
1.902 + Table *pTable; /* The SQL table being indexed */
1.903 + int tnum; /* Page containing root of this index in database file */
1.904 + u8 onError; /* OE_Abort, OE_Ignore, OE_Replace, or OE_None */
1.905 + u8 autoIndex; /* True if is automatically created (ex: by UNIQUE) */
1.906 + char *zColAff; /* String defining the affinity of each column */
1.907 + Index *pNext; /* The next index associated with the same table */
1.908 + Schema *pSchema; /* Schema containing this index */
1.909 + u8 *aSortOrder; /* Array of size Index.nColumn. True==DESC, False==ASC */
1.910 + char **azColl; /* Array of collation sequence names for index */
1.911 +};
1.912 +
1.913 +/*
1.914 +** Each token coming out of the lexer is an instance of
1.915 +** this structure. Tokens are also used as part of an expression.
1.916 +**
1.917 +** Note if Token.z==0 then Token.dyn and Token.n are undefined and
1.918 +** may contain random values. Do not make any assuptions about Token.dyn
1.919 +** and Token.n when Token.z==0.
1.920 +*/
1.921 +struct Token {
1.922 + const unsigned char *z; /* Text of the token. Not NULL-terminated! */
1.923 + unsigned dyn : 1; /* True for malloced memory, false for static */
1.924 + unsigned n : 31; /* Number of characters in this token */
1.925 +};
1.926 +
1.927 +/*
1.928 +** An instance of this structure contains information needed to generate
1.929 +** code for a SELECT that contains aggregate functions.
1.930 +**
1.931 +** If Expr.op==TK_AGG_COLUMN or TK_AGG_FUNCTION then Expr.pAggInfo is a
1.932 +** pointer to this structure. The Expr.iColumn field is the index in
1.933 +** AggInfo.aCol[] or AggInfo.aFunc[] of information needed to generate
1.934 +** code for that node.
1.935 +**
1.936 +** AggInfo.pGroupBy and AggInfo.aFunc.pExpr point to fields within the
1.937 +** original Select structure that describes the SELECT statement. These
1.938 +** fields do not need to be freed when deallocating the AggInfo structure.
1.939 +*/
1.940 +struct AggInfo {
1.941 + u8 directMode; /* Direct rendering mode means take data directly
1.942 + ** from source tables rather than from accumulators */
1.943 + u8 useSortingIdx; /* In direct mode, reference the sorting index rather
1.944 + ** than the source table */
1.945 + int sortingIdx; /* Cursor number of the sorting index */
1.946 + ExprList *pGroupBy; /* The group by clause */
1.947 + int nSortingColumn; /* Number of columns in the sorting index */
1.948 + struct AggInfo_col { /* For each column used in source tables */
1.949 + Table *pTab; /* Source table */
1.950 + int iTable; /* Cursor number of the source table */
1.951 + int iColumn; /* Column number within the source table */
1.952 + int iSorterColumn; /* Column number in the sorting index */
1.953 + int iMem; /* Memory location that acts as accumulator */
1.954 + Expr *pExpr; /* The original expression */
1.955 + } *aCol;
1.956 + int nColumn; /* Number of used entries in aCol[] */
1.957 + int nColumnAlloc; /* Number of slots allocated for aCol[] */
1.958 + int nAccumulator; /* Number of columns that show through to the output.
1.959 + ** Additional columns are used only as parameters to
1.960 + ** aggregate functions */
1.961 + struct AggInfo_func { /* For each aggregate function */
1.962 + Expr *pExpr; /* Expression encoding the function */
1.963 + FuncDef *pFunc; /* The aggregate function implementation */
1.964 + int iMem; /* Memory location that acts as accumulator */
1.965 + int iDistinct; /* Ephermeral table used to enforce DISTINCT */
1.966 + } *aFunc;
1.967 + int nFunc; /* Number of entries in aFunc[] */
1.968 + int nFuncAlloc; /* Number of slots allocated for aFunc[] */
1.969 +};
1.970 +
1.971 +/*
1.972 +** Each node of an expression in the parse tree is an instance
1.973 +** of this structure.
1.974 +**
1.975 +** Expr.op is the opcode. The integer parser token codes are reused
1.976 +** as opcodes here. For example, the parser defines TK_GE to be an integer
1.977 +** code representing the ">=" operator. This same integer code is reused
1.978 +** to represent the greater-than-or-equal-to operator in the expression
1.979 +** tree.
1.980 +**
1.981 +** Expr.pRight and Expr.pLeft are subexpressions. Expr.pList is a list
1.982 +** of argument if the expression is a function.
1.983 +**
1.984 +** Expr.token is the operator token for this node. For some expressions
1.985 +** that have subexpressions, Expr.token can be the complete text that gave
1.986 +** rise to the Expr. In the latter case, the token is marked as being
1.987 +** a compound token.
1.988 +**
1.989 +** An expression of the form ID or ID.ID refers to a column in a table.
1.990 +** For such expressions, Expr.op is set to TK_COLUMN and Expr.iTable is
1.991 +** the integer cursor number of a VDBE cursor pointing to that table and
1.992 +** Expr.iColumn is the column number for the specific column. If the
1.993 +** expression is used as a result in an aggregate SELECT, then the
1.994 +** value is also stored in the Expr.iAgg column in the aggregate so that
1.995 +** it can be accessed after all aggregates are computed.
1.996 +**
1.997 +** If the expression is a function, the Expr.iTable is an integer code
1.998 +** representing which function. If the expression is an unbound variable
1.999 +** marker (a question mark character '?' in the original SQL) then the
1.1000 +** Expr.iTable holds the index number for that variable.
1.1001 +**
1.1002 +** If the expression is a subquery then Expr.iColumn holds an integer
1.1003 +** register number containing the result of the subquery. If the
1.1004 +** subquery gives a constant result, then iTable is -1. If the subquery
1.1005 +** gives a different answer at different times during statement processing
1.1006 +** then iTable is the address of a subroutine that computes the subquery.
1.1007 +**
1.1008 +** The Expr.pSelect field points to a SELECT statement. The SELECT might
1.1009 +** be the right operand of an IN operator. Or, if a scalar SELECT appears
1.1010 +** in an expression the opcode is TK_SELECT and Expr.pSelect is the only
1.1011 +** operand.
1.1012 +**
1.1013 +** If the Expr is of type OP_Column, and the table it is selecting from
1.1014 +** is a disk table or the "old.*" pseudo-table, then pTab points to the
1.1015 +** corresponding table definition.
1.1016 +*/
1.1017 +struct Expr {
1.1018 + u8 op; /* Operation performed by this node */
1.1019 + char affinity; /* The affinity of the column or 0 if not a column */
1.1020 + u16 flags; /* Various flags. See below */
1.1021 + CollSeq *pColl; /* The collation type of the column or 0 */
1.1022 + Expr *pLeft, *pRight; /* Left and right subnodes */
1.1023 + ExprList *pList; /* A list of expressions used as function arguments
1.1024 + ** or in "<expr> IN (<expr-list)" */
1.1025 + Token token; /* An operand token */
1.1026 + Token span; /* Complete text of the expression */
1.1027 + int iTable, iColumn; /* When op==TK_COLUMN, then this expr node means the
1.1028 + ** iColumn-th field of the iTable-th table. */
1.1029 + AggInfo *pAggInfo; /* Used by TK_AGG_COLUMN and TK_AGG_FUNCTION */
1.1030 + int iAgg; /* Which entry in pAggInfo->aCol[] or ->aFunc[] */
1.1031 + int iRightJoinTable; /* If EP_FromJoin, the right table of the join */
1.1032 + Select *pSelect; /* When the expression is a sub-select. Also the
1.1033 + ** right side of "<expr> IN (<select>)" */
1.1034 + Table *pTab; /* Table for OP_Column expressions. */
1.1035 +/* Schema *pSchema; */
1.1036 +#if defined(SQLITE_TEST) || SQLITE_MAX_EXPR_DEPTH>0
1.1037 + int nHeight; /* Height of the tree headed by this node */
1.1038 +#endif
1.1039 +};
1.1040 +
1.1041 +/*
1.1042 +** The following are the meanings of bits in the Expr.flags field.
1.1043 +*/
1.1044 +#define EP_FromJoin 0x01 /* Originated in ON or USING clause of a join */
1.1045 +#define EP_Agg 0x02 /* Contains one or more aggregate functions */
1.1046 +#define EP_Resolved 0x04 /* IDs have been resolved to COLUMNs */
1.1047 +#define EP_Error 0x08 /* Expression contains one or more errors */
1.1048 +#define EP_Distinct 0x10 /* Aggregate function with DISTINCT keyword */
1.1049 +#define EP_VarSelect 0x20 /* pSelect is correlated, not constant */
1.1050 +#define EP_Dequoted 0x40 /* True if the string has been dequoted */
1.1051 +#define EP_InfixFunc 0x80 /* True for an infix function: LIKE, GLOB, etc */
1.1052 +#define EP_ExpCollate 0x100 /* Collating sequence specified explicitly */
1.1053 +
1.1054 +/*
1.1055 +** These macros can be used to test, set, or clear bits in the
1.1056 +** Expr.flags field.
1.1057 +*/
1.1058 +#define ExprHasProperty(E,P) (((E)->flags&(P))==(P))
1.1059 +#define ExprHasAnyProperty(E,P) (((E)->flags&(P))!=0)
1.1060 +#define ExprSetProperty(E,P) (E)->flags|=(P)
1.1061 +#define ExprClearProperty(E,P) (E)->flags&=~(P)
1.1062 +
1.1063 +/*
1.1064 +** A list of expressions. Each expression may optionally have a
1.1065 +** name. An expr/name combination can be used in several ways, such
1.1066 +** as the list of "expr AS ID" fields following a "SELECT" or in the
1.1067 +** list of "ID = expr" items in an UPDATE. A list of expressions can
1.1068 +** also be used as the argument to a function, in which case the a.zName
1.1069 +** field is not used.
1.1070 +*/
1.1071 +struct ExprList {
1.1072 + int nExpr; /* Number of expressions on the list */
1.1073 + int nAlloc; /* Number of entries allocated below */
1.1074 + int iECursor; /* VDBE Cursor associated with this ExprList */
1.1075 + struct ExprList_item {
1.1076 + Expr *pExpr; /* The list of expressions */
1.1077 + char *zName; /* Token associated with this expression */
1.1078 + u8 sortOrder; /* 1 for DESC or 0 for ASC */
1.1079 + u8 isAgg; /* True if this is an aggregate like count(*) */
1.1080 + u8 done; /* A flag to indicate when processing is finished */
1.1081 + } *a; /* One entry for each expression */
1.1082 +};
1.1083 +
1.1084 +/*
1.1085 +** An instance of this structure can hold a simple list of identifiers,
1.1086 +** such as the list "a,b,c" in the following statements:
1.1087 +**
1.1088 +** INSERT INTO t(a,b,c) VALUES ...;
1.1089 +** CREATE INDEX idx ON t(a,b,c);
1.1090 +** CREATE TRIGGER trig BEFORE UPDATE ON t(a,b,c) ...;
1.1091 +**
1.1092 +** The IdList.a.idx field is used when the IdList represents the list of
1.1093 +** column names after a table name in an INSERT statement. In the statement
1.1094 +**
1.1095 +** INSERT INTO t(a,b,c) ...
1.1096 +**
1.1097 +** If "a" is the k-th column of table "t", then IdList.a[0].idx==k.
1.1098 +*/
1.1099 +struct IdList {
1.1100 + struct IdList_item {
1.1101 + char *zName; /* Name of the identifier */
1.1102 + int idx; /* Index in some Table.aCol[] of a column named zName */
1.1103 + } *a;
1.1104 + int nId; /* Number of identifiers on the list */
1.1105 + int nAlloc; /* Number of entries allocated for a[] below */
1.1106 +};
1.1107 +
1.1108 +/*
1.1109 +** The bitmask datatype defined below is used for various optimizations.
1.1110 +**
1.1111 +** Changing this from a 64-bit to a 32-bit type limits the number of
1.1112 +** tables in a join to 32 instead of 64. But it also reduces the size
1.1113 +** of the library by 738 bytes on ix86.
1.1114 +*/
1.1115 +typedef u64 Bitmask;
1.1116 +
1.1117 +/*
1.1118 +** The following structure describes the FROM clause of a SELECT statement.
1.1119 +** Each table or subquery in the FROM clause is a separate element of
1.1120 +** the SrcList.a[] array.
1.1121 +**
1.1122 +** With the addition of multiple database support, the following structure
1.1123 +** can also be used to describe a particular table such as the table that
1.1124 +** is modified by an INSERT, DELETE, or UPDATE statement. In standard SQL,
1.1125 +** such a table must be a simple name: ID. But in SQLite, the table can
1.1126 +** now be identified by a database name, a dot, then the table name: ID.ID.
1.1127 +**
1.1128 +** The jointype starts out showing the join type between the current table
1.1129 +** and the next table on the list. The parser builds the list this way.
1.1130 +** But sqlite3SrcListShiftJoinType() later shifts the jointypes so that each
1.1131 +** jointype expresses the join between the table and the previous table.
1.1132 +*/
1.1133 +struct SrcList {
1.1134 + i16 nSrc; /* Number of tables or subqueries in the FROM clause */
1.1135 + i16 nAlloc; /* Number of entries allocated in a[] below */
1.1136 + struct SrcList_item {
1.1137 + char *zDatabase; /* Name of database holding this table */
1.1138 + char *zName; /* Name of the table */
1.1139 + char *zAlias; /* The "B" part of a "A AS B" phrase. zName is the "A" */
1.1140 + Table *pTab; /* An SQL table corresponding to zName */
1.1141 + Select *pSelect; /* A SELECT statement used in place of a table name */
1.1142 + u8 isPopulated; /* Temporary table associated with SELECT is populated */
1.1143 + u8 jointype; /* Type of join between this able and the previous */
1.1144 + int iCursor; /* The VDBE cursor number used to access this table */
1.1145 + Expr *pOn; /* The ON clause of a join */
1.1146 + IdList *pUsing; /* The USING clause of a join */
1.1147 + Bitmask colUsed; /* Bit N (1<<N) set if column N or pTab is used */
1.1148 + } a[1]; /* One entry for each identifier on the list */
1.1149 +};
1.1150 +
1.1151 +/*
1.1152 +** Permitted values of the SrcList.a.jointype field
1.1153 +*/
1.1154 +#define JT_INNER 0x0001 /* Any kind of inner or cross join */
1.1155 +#define JT_CROSS 0x0002 /* Explicit use of the CROSS keyword */
1.1156 +#define JT_NATURAL 0x0004 /* True for a "natural" join */
1.1157 +#define JT_LEFT 0x0008 /* Left outer join */
1.1158 +#define JT_RIGHT 0x0010 /* Right outer join */
1.1159 +#define JT_OUTER 0x0020 /* The "OUTER" keyword is present */
1.1160 +#define JT_ERROR 0x0040 /* unknown or unsupported join type */
1.1161 +
1.1162 +/*
1.1163 +** For each nested loop in a WHERE clause implementation, the WhereInfo
1.1164 +** structure contains a single instance of this structure. This structure
1.1165 +** is intended to be private the the where.c module and should not be
1.1166 +** access or modified by other modules.
1.1167 +**
1.1168 +** The pIdxInfo and pBestIdx fields are used to help pick the best
1.1169 +** index on a virtual table. The pIdxInfo pointer contains indexing
1.1170 +** information for the i-th table in the FROM clause before reordering.
1.1171 +** All the pIdxInfo pointers are freed by whereInfoFree() in where.c.
1.1172 +** The pBestIdx pointer is a copy of pIdxInfo for the i-th table after
1.1173 +** FROM clause ordering. This is a little confusing so I will repeat
1.1174 +** it in different words. WhereInfo.a[i].pIdxInfo is index information
1.1175 +** for WhereInfo.pTabList.a[i]. WhereInfo.a[i].pBestInfo is the
1.1176 +** index information for the i-th loop of the join. pBestInfo is always
1.1177 +** either NULL or a copy of some pIdxInfo. So for cleanup it is
1.1178 +** sufficient to free all of the pIdxInfo pointers.
1.1179 +**
1.1180 +*/
1.1181 +struct WhereLevel {
1.1182 + int iFrom; /* Which entry in the FROM clause */
1.1183 + int flags; /* Flags associated with this level */
1.1184 + int iMem; /* First memory cell used by this level */
1.1185 + int iLeftJoin; /* Memory cell used to implement LEFT OUTER JOIN */
1.1186 + Index *pIdx; /* Index used. NULL if no index */
1.1187 + int iTabCur; /* The VDBE cursor used to access the table */
1.1188 + int iIdxCur; /* The VDBE cursor used to acesss pIdx */
1.1189 + int brk; /* Jump here to break out of the loop */
1.1190 + int nxt; /* Jump here to start the next IN combination */
1.1191 + int cont; /* Jump here to continue with the next loop cycle */
1.1192 + int top; /* First instruction of interior of the loop */
1.1193 + int op, p1, p2; /* Opcode used to terminate the loop */
1.1194 + int nEq; /* Number of == or IN constraints on this loop */
1.1195 + int nIn; /* Number of IN operators constraining this loop */
1.1196 + struct InLoop {
1.1197 + int iCur; /* The VDBE cursor used by this IN operator */
1.1198 + int topAddr; /* Top of the IN loop */
1.1199 + } *aInLoop; /* Information about each nested IN operator */
1.1200 + sqlite3_index_info *pBestIdx; /* Index information for this level */
1.1201 +
1.1202 + /* The following field is really not part of the current level. But
1.1203 + ** we need a place to cache index information for each table in the
1.1204 + ** FROM clause and the WhereLevel structure is a convenient place.
1.1205 + */
1.1206 + sqlite3_index_info *pIdxInfo; /* Index info for n-th source table */
1.1207 +};
1.1208 +
1.1209 +/*
1.1210 +** The WHERE clause processing routine has two halves. The
1.1211 +** first part does the start of the WHERE loop and the second
1.1212 +** half does the tail of the WHERE loop. An instance of
1.1213 +** this structure is returned by the first half and passed
1.1214 +** into the second half to give some continuity.
1.1215 +*/
1.1216 +struct WhereInfo {
1.1217 + Parse *pParse;
1.1218 + SrcList *pTabList; /* List of tables in the join */
1.1219 + int iTop; /* The very beginning of the WHERE loop */
1.1220 + int iContinue; /* Jump here to continue with next record */
1.1221 + int iBreak; /* Jump here to break out of the loop */
1.1222 + int nLevel; /* Number of nested loop */
1.1223 + sqlite3_index_info **apInfo; /* Array of pointers to index info structures */
1.1224 + WhereLevel a[1]; /* Information about each nest loop in the WHERE */
1.1225 +};
1.1226 +
1.1227 +/*
1.1228 +** A NameContext defines a context in which to resolve table and column
1.1229 +** names. The context consists of a list of tables (the pSrcList) field and
1.1230 +** a list of named expression (pEList). The named expression list may
1.1231 +** be NULL. The pSrc corresponds to the FROM clause of a SELECT or
1.1232 +** to the table being operated on by INSERT, UPDATE, or DELETE. The
1.1233 +** pEList corresponds to the result set of a SELECT and is NULL for
1.1234 +** other statements.
1.1235 +**
1.1236 +** NameContexts can be nested. When resolving names, the inner-most
1.1237 +** context is searched first. If no match is found, the next outer
1.1238 +** context is checked. If there is still no match, the next context
1.1239 +** is checked. This process continues until either a match is found
1.1240 +** or all contexts are check. When a match is found, the nRef member of
1.1241 +** the context containing the match is incremented.
1.1242 +**
1.1243 +** Each subquery gets a new NameContext. The pNext field points to the
1.1244 +** NameContext in the parent query. Thus the process of scanning the
1.1245 +** NameContext list corresponds to searching through successively outer
1.1246 +** subqueries looking for a match.
1.1247 +*/
1.1248 +struct NameContext {
1.1249 + Parse *pParse; /* The parser */
1.1250 + SrcList *pSrcList; /* One or more tables used to resolve names */
1.1251 + ExprList *pEList; /* Optional list of named expressions */
1.1252 + int nRef; /* Number of names resolved by this context */
1.1253 + int nErr; /* Number of errors encountered while resolving names */
1.1254 + u8 allowAgg; /* Aggregate functions allowed here */
1.1255 + u8 hasAgg; /* True if aggregates are seen */
1.1256 + u8 isCheck; /* True if resolving names in a CHECK constraint */
1.1257 + int nDepth; /* Depth of subquery recursion. 1 for no recursion */
1.1258 + AggInfo *pAggInfo; /* Information about aggregates at this level */
1.1259 + NameContext *pNext; /* Next outer name context. NULL for outermost */
1.1260 +};
1.1261 +
1.1262 +/*
1.1263 +** An instance of the following structure contains all information
1.1264 +** needed to generate code for a single SELECT statement.
1.1265 +**
1.1266 +** nLimit is set to -1 if there is no LIMIT clause. nOffset is set to 0.
1.1267 +** If there is a LIMIT clause, the parser sets nLimit to the value of the
1.1268 +** limit and nOffset to the value of the offset (or 0 if there is not
1.1269 +** offset). But later on, nLimit and nOffset become the memory locations
1.1270 +** in the VDBE that record the limit and offset counters.
1.1271 +**
1.1272 +** addrOpenEphm[] entries contain the address of OP_OpenEphemeral opcodes.
1.1273 +** These addresses must be stored so that we can go back and fill in
1.1274 +** the P3_KEYINFO and P2 parameters later. Neither the KeyInfo nor
1.1275 +** the number of columns in P2 can be computed at the same time
1.1276 +** as the OP_OpenEphm instruction is coded because not
1.1277 +** enough information about the compound query is known at that point.
1.1278 +** The KeyInfo for addrOpenTran[0] and [1] contains collating sequences
1.1279 +** for the result set. The KeyInfo for addrOpenTran[2] contains collating
1.1280 +** sequences for the ORDER BY clause.
1.1281 +*/
1.1282 +struct Select {
1.1283 + ExprList *pEList; /* The fields of the result */
1.1284 + u8 op; /* One of: TK_UNION TK_ALL TK_INTERSECT TK_EXCEPT */
1.1285 + u8 isDistinct; /* True if the DISTINCT keyword is present */
1.1286 + u8 isResolved; /* True once sqlite3SelectResolve() has run. */
1.1287 + u8 isAgg; /* True if this is an aggregate query */
1.1288 + u8 usesEphm; /* True if uses an OpenEphemeral opcode */
1.1289 + u8 disallowOrderBy; /* Do not allow an ORDER BY to be attached if TRUE */
1.1290 + char affinity; /* MakeRecord with this affinity for SRT_Set */
1.1291 + SrcList *pSrc; /* The FROM clause */
1.1292 + Expr *pWhere; /* The WHERE clause */
1.1293 + ExprList *pGroupBy; /* The GROUP BY clause */
1.1294 + Expr *pHaving; /* The HAVING clause */
1.1295 + ExprList *pOrderBy; /* The ORDER BY clause */
1.1296 + Select *pPrior; /* Prior select in a compound select statement */
1.1297 + Select *pRightmost; /* Right-most select in a compound select statement */
1.1298 + Expr *pLimit; /* LIMIT expression. NULL means not used. */
1.1299 + Expr *pOffset; /* OFFSET expression. NULL means not used. */
1.1300 + int iLimit, iOffset; /* Memory registers holding LIMIT & OFFSET counters */
1.1301 + int addrOpenEphm[3]; /* OP_OpenEphem opcodes related to this select */
1.1302 +};
1.1303 +
1.1304 +/*
1.1305 +** The results of a select can be distributed in several ways.
1.1306 +*/
1.1307 +#define SRT_Union 1 /* Store result as keys in an index */
1.1308 +#define SRT_Except 2 /* Remove result from a UNION index */
1.1309 +#define SRT_Discard 3 /* Do not save the results anywhere */
1.1310 +
1.1311 +/* The ORDER BY clause is ignored for all of the above */
1.1312 +#define IgnorableOrderby(X) (X<=SRT_Discard)
1.1313 +
1.1314 +#define SRT_Callback 4 /* Invoke a callback with each row of result */
1.1315 +#define SRT_Mem 5 /* Store result in a memory cell */
1.1316 +#define SRT_Set 6 /* Store non-null results as keys in an index */
1.1317 +#define SRT_Table 7 /* Store result as data with an automatic rowid */
1.1318 +#define SRT_EphemTab 8 /* Create transient tab and store like SRT_Table */
1.1319 +#define SRT_Subroutine 9 /* Call a subroutine to handle results */
1.1320 +#define SRT_Exists 10 /* Store 1 if the result is not empty */
1.1321 +
1.1322 +/*
1.1323 +** An SQL parser context. A copy of this structure is passed through
1.1324 +** the parser and down into all the parser action routine in order to
1.1325 +** carry around information that is global to the entire parse.
1.1326 +**
1.1327 +** The structure is divided into two parts. When the parser and code
1.1328 +** generate call themselves recursively, the first part of the structure
1.1329 +** is constant but the second part is reset at the beginning and end of
1.1330 +** each recursion.
1.1331 +**
1.1332 +** The nTableLock and aTableLock variables are only used if the shared-cache
1.1333 +** feature is enabled (if sqlite3Tsd()->useSharedData is true). They are
1.1334 +** used to store the set of table-locks required by the statement being
1.1335 +** compiled. Function sqlite3TableLock() is used to add entries to the
1.1336 +** list.
1.1337 +*/
1.1338 +struct Parse {
1.1339 + sqlite3 *db; /* The main database structure */
1.1340 + int rc; /* Return code from execution */
1.1341 + char *zErrMsg; /* An error message */
1.1342 + Vdbe *pVdbe; /* An engine for executing database bytecode */
1.1343 + u8 colNamesSet; /* TRUE after OP_ColumnName has been issued to pVdbe */
1.1344 + u8 nameClash; /* A permanent table name clashes with temp table name */
1.1345 + u8 checkSchema; /* Causes schema cookie check after an error */
1.1346 + u8 nested; /* Number of nested calls to the parser/code generator */
1.1347 + u8 parseError; /* True after a parsing error. Ticket #1794 */
1.1348 + int nErr; /* Number of errors seen */
1.1349 + int nTab; /* Number of previously allocated VDBE cursors */
1.1350 + int nMem; /* Number of memory cells used so far */
1.1351 + int nSet; /* Number of sets used so far */
1.1352 + int ckOffset; /* Stack offset to data used by CHECK constraints */
1.1353 + u32 writeMask; /* Start a write transaction on these databases */
1.1354 + u32 cookieMask; /* Bitmask of schema verified databases */
1.1355 + int cookieGoto; /* Address of OP_Goto to cookie verifier subroutine */
1.1356 + int cookieValue[SQLITE_MAX_ATTACHED+2]; /* Values of cookies to verify */
1.1357 +#ifndef SQLITE_OMIT_SHARED_CACHE
1.1358 + int nTableLock; /* Number of locks in aTableLock */
1.1359 + TableLock *aTableLock; /* Required table locks for shared-cache mode */
1.1360 +#endif
1.1361 +
1.1362 + /* Above is constant between recursions. Below is reset before and after
1.1363 + ** each recursion */
1.1364 +
1.1365 + int nVar; /* Number of '?' variables seen in the SQL so far */
1.1366 + int nVarExpr; /* Number of used slots in apVarExpr[] */
1.1367 + int nVarExprAlloc; /* Number of allocated slots in apVarExpr[] */
1.1368 + Expr **apVarExpr; /* Pointers to :aaa and $aaaa wildcard expressions */
1.1369 + u8 explain; /* True if the EXPLAIN flag is found on the query */
1.1370 + Token sErrToken; /* The token at which the error occurred */
1.1371 + Token sNameToken; /* Token with unqualified schema object name */
1.1372 + Token sLastToken; /* The last token parsed */
1.1373 + const char *zSql; /* All SQL text */
1.1374 + const char *zTail; /* All SQL text past the last semicolon parsed */
1.1375 + Table *pNewTable; /* A table being constructed by CREATE TABLE */
1.1376 + Trigger *pNewTrigger; /* Trigger under construct by a CREATE TRIGGER */
1.1377 + TriggerStack *trigStack; /* Trigger actions being coded */
1.1378 + const char *zAuthContext; /* The 6th parameter to db->xAuth callbacks */
1.1379 +#ifndef SQLITE_OMIT_VIRTUALTABLE
1.1380 + Token sArg; /* Complete text of a module argument */
1.1381 + u8 declareVtab; /* True if inside sqlite3_declare_vtab() */
1.1382 + Table *pVirtualLock; /* Require virtual table lock on this table */
1.1383 +#endif
1.1384 +#if defined(SQLITE_TEST) || SQLITE_MAX_EXPR_DEPTH>0
1.1385 + int nHeight; /* Expression tree height of current sub-select */
1.1386 +#endif
1.1387 +};
1.1388 +
1.1389 +#ifdef SQLITE_OMIT_VIRTUALTABLE
1.1390 + #define IN_DECLARE_VTAB 0
1.1391 +#else
1.1392 + #define IN_DECLARE_VTAB (pParse->declareVtab)
1.1393 +#endif
1.1394 +
1.1395 +/*
1.1396 +** An instance of the following structure can be declared on a stack and used
1.1397 +** to save the Parse.zAuthContext value so that it can be restored later.
1.1398 +*/
1.1399 +struct AuthContext {
1.1400 + const char *zAuthContext; /* Put saved Parse.zAuthContext here */
1.1401 + Parse *pParse; /* The Parse structure */
1.1402 +};
1.1403 +
1.1404 +/*
1.1405 +** Bitfield flags for P2 value in OP_Insert and OP_Delete
1.1406 +*/
1.1407 +#define OPFLAG_NCHANGE 1 /* Set to update db->nChange */
1.1408 +#define OPFLAG_LASTROWID 2 /* Set to update db->lastRowid */
1.1409 +#define OPFLAG_ISUPDATE 4 /* This OP_Insert is an sql UPDATE */
1.1410 +#define OPFLAG_APPEND 8 /* This is likely to be an append */
1.1411 +
1.1412 +/*
1.1413 + * Each trigger present in the database schema is stored as an instance of
1.1414 + * struct Trigger.
1.1415 + *
1.1416 + * Pointers to instances of struct Trigger are stored in two ways.
1.1417 + * 1. In the "trigHash" hash table (part of the sqlite3* that represents the
1.1418 + * database). This allows Trigger structures to be retrieved by name.
1.1419 + * 2. All triggers associated with a single table form a linked list, using the
1.1420 + * pNext member of struct Trigger. A pointer to the first element of the
1.1421 + * linked list is stored as the "pTrigger" member of the associated
1.1422 + * struct Table.
1.1423 + *
1.1424 + * The "step_list" member points to the first element of a linked list
1.1425 + * containing the SQL statements specified as the trigger program.
1.1426 + */
1.1427 +struct Trigger {
1.1428 + char *name; /* The name of the trigger */
1.1429 + char *table; /* The table or view to which the trigger applies */
1.1430 + u8 op; /* One of TK_DELETE, TK_UPDATE, TK_INSERT */
1.1431 + u8 tr_tm; /* One of TRIGGER_BEFORE, TRIGGER_AFTER */
1.1432 + Expr *pWhen; /* The WHEN clause of the expresion (may be NULL) */
1.1433 + IdList *pColumns; /* If this is an UPDATE OF <column-list> trigger,
1.1434 + the <column-list> is stored here */
1.1435 + Token nameToken; /* Token containing zName. Use during parsing only */
1.1436 + Schema *pSchema; /* Schema containing the trigger */
1.1437 + Schema *pTabSchema; /* Schema containing the table */
1.1438 + TriggerStep *step_list; /* Link list of trigger program steps */
1.1439 + Trigger *pNext; /* Next trigger associated with the table */
1.1440 +};
1.1441 +
1.1442 +/*
1.1443 +** A trigger is either a BEFORE or an AFTER trigger. The following constants
1.1444 +** determine which.
1.1445 +**
1.1446 +** If there are multiple triggers, you might of some BEFORE and some AFTER.
1.1447 +** In that cases, the constants below can be ORed together.
1.1448 +*/
1.1449 +#define TRIGGER_BEFORE 1
1.1450 +#define TRIGGER_AFTER 2
1.1451 +
1.1452 +/*
1.1453 + * An instance of struct TriggerStep is used to store a single SQL statement
1.1454 + * that is a part of a trigger-program.
1.1455 + *
1.1456 + * Instances of struct TriggerStep are stored in a singly linked list (linked
1.1457 + * using the "pNext" member) referenced by the "step_list" member of the
1.1458 + * associated struct Trigger instance. The first element of the linked list is
1.1459 + * the first step of the trigger-program.
1.1460 + *
1.1461 + * The "op" member indicates whether this is a "DELETE", "INSERT", "UPDATE" or
1.1462 + * "SELECT" statement. The meanings of the other members is determined by the
1.1463 + * value of "op" as follows:
1.1464 + *
1.1465 + * (op == TK_INSERT)
1.1466 + * orconf -> stores the ON CONFLICT algorithm
1.1467 + * pSelect -> If this is an INSERT INTO ... SELECT ... statement, then
1.1468 + * this stores a pointer to the SELECT statement. Otherwise NULL.
1.1469 + * target -> A token holding the name of the table to insert into.
1.1470 + * pExprList -> If this is an INSERT INTO ... VALUES ... statement, then
1.1471 + * this stores values to be inserted. Otherwise NULL.
1.1472 + * pIdList -> If this is an INSERT INTO ... (<column-names>) VALUES ...
1.1473 + * statement, then this stores the column-names to be
1.1474 + * inserted into.
1.1475 + *
1.1476 + * (op == TK_DELETE)
1.1477 + * target -> A token holding the name of the table to delete from.
1.1478 + * pWhere -> The WHERE clause of the DELETE statement if one is specified.
1.1479 + * Otherwise NULL.
1.1480 + *
1.1481 + * (op == TK_UPDATE)
1.1482 + * target -> A token holding the name of the table to update rows of.
1.1483 + * pWhere -> The WHERE clause of the UPDATE statement if one is specified.
1.1484 + * Otherwise NULL.
1.1485 + * pExprList -> A list of the columns to update and the expressions to update
1.1486 + * them to. See sqlite3Update() documentation of "pChanges"
1.1487 + * argument.
1.1488 + *
1.1489 + */
1.1490 +struct TriggerStep {
1.1491 + int op; /* One of TK_DELETE, TK_UPDATE, TK_INSERT, TK_SELECT */
1.1492 + int orconf; /* OE_Rollback etc. */
1.1493 + Trigger *pTrig; /* The trigger that this step is a part of */
1.1494 +
1.1495 + Select *pSelect; /* Valid for SELECT and sometimes
1.1496 + INSERT steps (when pExprList == 0) */
1.1497 + Token target; /* Valid for DELETE, UPDATE, INSERT steps */
1.1498 + Expr *pWhere; /* Valid for DELETE, UPDATE steps */
1.1499 + ExprList *pExprList; /* Valid for UPDATE statements and sometimes
1.1500 + INSERT steps (when pSelect == 0) */
1.1501 + IdList *pIdList; /* Valid for INSERT statements only */
1.1502 + TriggerStep *pNext; /* Next in the link-list */
1.1503 + TriggerStep *pLast; /* Last element in link-list. Valid for 1st elem only */
1.1504 +};
1.1505 +
1.1506 +/*
1.1507 + * An instance of struct TriggerStack stores information required during code
1.1508 + * generation of a single trigger program. While the trigger program is being
1.1509 + * coded, its associated TriggerStack instance is pointed to by the
1.1510 + * "pTriggerStack" member of the Parse structure.
1.1511 + *
1.1512 + * The pTab member points to the table that triggers are being coded on. The
1.1513 + * newIdx member contains the index of the vdbe cursor that points at the temp
1.1514 + * table that stores the new.* references. If new.* references are not valid
1.1515 + * for the trigger being coded (for example an ON DELETE trigger), then newIdx
1.1516 + * is set to -1. The oldIdx member is analogous to newIdx, for old.* references.
1.1517 + *
1.1518 + * The ON CONFLICT policy to be used for the trigger program steps is stored
1.1519 + * as the orconf member. If this is OE_Default, then the ON CONFLICT clause
1.1520 + * specified for individual triggers steps is used.
1.1521 + *
1.1522 + * struct TriggerStack has a "pNext" member, to allow linked lists to be
1.1523 + * constructed. When coding nested triggers (triggers fired by other triggers)
1.1524 + * each nested trigger stores its parent trigger's TriggerStack as the "pNext"
1.1525 + * pointer. Once the nested trigger has been coded, the pNext value is restored
1.1526 + * to the pTriggerStack member of the Parse stucture and coding of the parent
1.1527 + * trigger continues.
1.1528 + *
1.1529 + * Before a nested trigger is coded, the linked list pointed to by the
1.1530 + * pTriggerStack is scanned to ensure that the trigger is not about to be coded
1.1531 + * recursively. If this condition is detected, the nested trigger is not coded.
1.1532 + */
1.1533 +struct TriggerStack {
1.1534 + Table *pTab; /* Table that triggers are currently being coded on */
1.1535 + int newIdx; /* Index of vdbe cursor to "new" temp table */
1.1536 + int oldIdx; /* Index of vdbe cursor to "old" temp table */
1.1537 + int orconf; /* Current orconf policy */
1.1538 + int ignoreJump; /* where to jump to for a RAISE(IGNORE) */
1.1539 + Trigger *pTrigger; /* The trigger currently being coded */
1.1540 + TriggerStack *pNext; /* Next trigger down on the trigger stack */
1.1541 +};
1.1542 +
1.1543 +/*
1.1544 +** The following structure contains information used by the sqliteFix...
1.1545 +** routines as they walk the parse tree to make database references
1.1546 +** explicit.
1.1547 +*/
1.1548 +typedef struct DbFixer DbFixer;
1.1549 +struct DbFixer {
1.1550 + Parse *pParse; /* The parsing context. Error messages written here */
1.1551 + const char *zDb; /* Make sure all objects are contained in this database */
1.1552 + const char *zType; /* Type of the container - used for error messages */
1.1553 + const Token *pName; /* Name of the container - used for error messages */
1.1554 +};
1.1555 +
1.1556 +/*
1.1557 +** A pointer to this structure is used to communicate information
1.1558 +** from sqlite3Init and OP_ParseSchema into the sqlite3InitCallback.
1.1559 +*/
1.1560 +typedef struct {
1.1561 + sqlite3 *db; /* The database being initialized */
1.1562 + int iDb; /* 0 for main database. 1 for TEMP, 2.. for ATTACHed */
1.1563 + char **pzErrMsg; /* Error message stored here */
1.1564 + int rc; /* Result code stored here */
1.1565 +} InitData;
1.1566 +
1.1567 +/*
1.1568 +** Assuming zIn points to the first byte of a UTF-8 character,
1.1569 +** advance zIn to point to the first byte of the next UTF-8 character.
1.1570 +*/
1.1571 +#define SQLITE_SKIP_UTF8(zIn) { \
1.1572 + if( (*(zIn++))>=0xc0 ){ \
1.1573 + while( (*zIn & 0xc0)==0x80 ){ zIn++; } \
1.1574 + } \
1.1575 +}
1.1576 +
1.1577 +/*
1.1578 +** The SQLITE_CORRUPT_BKPT macro can be either a constant (for production
1.1579 +** builds) or a function call (for debugging). If it is a function call,
1.1580 +** it allows the operator to set a breakpoint at the spot where database
1.1581 +** corruption is first detected.
1.1582 +*/
1.1583 +#ifdef SQLITE_DEBUG
1.1584 + int sqlite3Corrupt(void);
1.1585 +# define SQLITE_CORRUPT_BKPT sqlite3Corrupt()
1.1586 +#else
1.1587 +# define SQLITE_CORRUPT_BKPT SQLITE_CORRUPT
1.1588 +#endif
1.1589 +
1.1590 +/*
1.1591 +** Internal function prototypes
1.1592 +*/
1.1593 +int sqlite3StrICmp(const char *, const char *);
1.1594 +int sqlite3StrNICmp(const char *, const char *, int);
1.1595 +int sqlite3IsNumber(const char*, int*, u8);
1.1596 +
1.1597 +void *sqlite3MallocZero(unsigned);
1.1598 +void *sqlite3DbMallocZero(sqlite3*, unsigned);
1.1599 +void *sqlite3DbMallocRaw(sqlite3*, unsigned);
1.1600 +char *sqlite3StrDup(const char*);
1.1601 +char *sqlite3StrNDup(const char*, int);
1.1602 +char *sqlite3DbStrDup(sqlite3*,const char*);
1.1603 +char *sqlite3DbStrNDup(sqlite3*,const char*, int);
1.1604 +void *sqlite3DbReallocOrFree(sqlite3 *, void *, int);
1.1605 +void *sqlite3DbRealloc(sqlite3 *, void *, int);
1.1606 +
1.1607 +char *sqlite3MPrintf(sqlite3*,const char*, ...);
1.1608 +char *sqlite3VMPrintf(sqlite3*,const char*, va_list);
1.1609 +#if defined(SQLITE_TEST) || defined(SQLITE_DEBUG)
1.1610 + void sqlite3DebugPrintf(const char*, ...);
1.1611 + void *sqlite3TextToPtr(const char*);
1.1612 +#endif
1.1613 +void sqlite3SetString(char **, ...);
1.1614 +void sqlite3ErrorMsg(Parse*, const char*, ...);
1.1615 +void sqlite3ErrorClear(Parse*);
1.1616 +void sqlite3Dequote(char*);
1.1617 +void sqlite3DequoteExpr(sqlite3*, Expr*);
1.1618 +int sqlite3KeywordCode(const unsigned char*, int);
1.1619 +int sqlite3RunParser(Parse*, const char*, char **);
1.1620 +void sqlite3FinishCoding(Parse*);
1.1621 +Expr *sqlite3Expr(sqlite3*, int, Expr*, Expr*, const Token*);
1.1622 +Expr *sqlite3PExpr(Parse*, int, Expr*, Expr*, const Token*);
1.1623 +Expr *sqlite3RegisterExpr(Parse*,Token*);
1.1624 +Expr *sqlite3ExprAnd(sqlite3*,Expr*, Expr*);
1.1625 +void sqlite3ExprSpan(Expr*,Token*,Token*);
1.1626 +Expr *sqlite3ExprFunction(Parse*,ExprList*, Token*);
1.1627 +void sqlite3ExprAssignVarNumber(Parse*, Expr*);
1.1628 +void sqlite3ExprDelete(Expr*);
1.1629 +ExprList *sqlite3ExprListAppend(Parse*,ExprList*,Expr*,Token*);
1.1630 +void sqlite3ExprListDelete(ExprList*);
1.1631 +int sqlite3Init(sqlite3*, char**);
1.1632 +int sqlite3InitCallback(void*, int, char**, char**);
1.1633 +void sqlite3Pragma(Parse*,Token*,Token*,Token*,int);
1.1634 +void sqlite3ResetInternalSchema(sqlite3*, int);
1.1635 +void sqlite3BeginParse(Parse*,int);
1.1636 +void sqlite3CommitInternalChanges(sqlite3*);
1.1637 +Table *sqlite3ResultSetOfSelect(Parse*,char*,Select*);
1.1638 +void sqlite3OpenMasterTable(Parse *, int);
1.1639 +void sqlite3StartTable(Parse*,Token*,Token*,int,int,int,int);
1.1640 +void sqlite3AddColumn(Parse*,Token*);
1.1641 +void sqlite3AddNotNull(Parse*, int);
1.1642 +void sqlite3AddPrimaryKey(Parse*, ExprList*, int, int, int);
1.1643 +void sqlite3AddCheckConstraint(Parse*, Expr*);
1.1644 +void sqlite3AddColumnType(Parse*,Token*);
1.1645 +void sqlite3AddDefaultValue(Parse*,Expr*);
1.1646 +void sqlite3AddCollateType(Parse*, const char*, int);
1.1647 +void sqlite3EndTable(Parse*,Token*,Token*,Select*);
1.1648 +
1.1649 +void sqlite3CreateView(Parse*,Token*,Token*,Token*,Select*,int,int);
1.1650 +
1.1651 +#if !defined(SQLITE_OMIT_VIEW) || !defined(SQLITE_OMIT_VIRTUALTABLE)
1.1652 + int sqlite3ViewGetColumnNames(Parse*,Table*);
1.1653 +#else
1.1654 +# define sqlite3ViewGetColumnNames(A,B) 0
1.1655 +#endif
1.1656 +
1.1657 +void sqlite3DropTable(Parse*, SrcList*, int, int);
1.1658 +void sqlite3DeleteTable(Table*);
1.1659 +void sqlite3Insert(Parse*, SrcList*, ExprList*, Select*, IdList*, int);
1.1660 +void *sqlite3ArrayAllocate(sqlite3*,void*,int,int,int*,int*,int*);
1.1661 +IdList *sqlite3IdListAppend(sqlite3*, IdList*, Token*);
1.1662 +int sqlite3IdListIndex(IdList*,const char*);
1.1663 +SrcList *sqlite3SrcListAppend(sqlite3*, SrcList*, Token*, Token*);
1.1664 +SrcList *sqlite3SrcListAppendFromTerm(Parse*, SrcList*, Token*, Token*, Token*,
1.1665 + Select*, Expr*, IdList*);
1.1666 +void sqlite3SrcListShiftJoinType(SrcList*);
1.1667 +void sqlite3SrcListAssignCursors(Parse*, SrcList*);
1.1668 +void sqlite3IdListDelete(IdList*);
1.1669 +void sqlite3SrcListDelete(SrcList*);
1.1670 +void sqlite3CreateIndex(Parse*,Token*,Token*,SrcList*,ExprList*,int,Token*,
1.1671 + Token*, int, int);
1.1672 +void sqlite3DropIndex(Parse*, SrcList*, int);
1.1673 +int sqlite3Select(Parse*, Select*, int, int, Select*, int, int*, char *aff);
1.1674 +Select *sqlite3SelectNew(Parse*,ExprList*,SrcList*,Expr*,ExprList*,
1.1675 + Expr*,ExprList*,int,Expr*,Expr*);
1.1676 +void sqlite3SelectDelete(Select*);
1.1677 +Table *sqlite3SrcListLookup(Parse*, SrcList*);
1.1678 +int sqlite3IsReadOnly(Parse*, Table*, int);
1.1679 +void sqlite3OpenTable(Parse*, int iCur, int iDb, Table*, int);
1.1680 +void sqlite3DeleteFrom(Parse*, SrcList*, Expr*);
1.1681 +void sqlite3Update(Parse*, SrcList*, ExprList*, Expr*, int);
1.1682 +WhereInfo *sqlite3WhereBegin(Parse*, SrcList*, Expr*, ExprList**);
1.1683 +void sqlite3WhereEnd(WhereInfo*);
1.1684 +void sqlite3ExprCodeGetColumn(Vdbe*, Table*, int, int);
1.1685 +void sqlite3ExprCode(Parse*, Expr*);
1.1686 +void sqlite3ExprCodeAndCache(Parse*, Expr*);
1.1687 +int sqlite3ExprCodeExprList(Parse*, ExprList*);
1.1688 +void sqlite3ExprIfTrue(Parse*, Expr*, int, int);
1.1689 +void sqlite3ExprIfFalse(Parse*, Expr*, int, int);
1.1690 +Table *sqlite3FindTable(sqlite3*,const char*, const char*);
1.1691 +Table *sqlite3LocateTable(Parse*,const char*, const char*);
1.1692 +Index *sqlite3FindIndex(sqlite3*,const char*, const char*);
1.1693 +void sqlite3UnlinkAndDeleteTable(sqlite3*,int,const char*);
1.1694 +void sqlite3UnlinkAndDeleteIndex(sqlite3*,int,const char*);
1.1695 +void sqlite3Vacuum(Parse*);
1.1696 +int sqlite3RunVacuum(char**, sqlite3*);
1.1697 +char *sqlite3NameFromToken(sqlite3*, Token*);
1.1698 +int sqlite3ExprCompare(Expr*, Expr*);
1.1699 +int sqlite3ExprResolveNames(NameContext *, Expr *);
1.1700 +int sqlite3ExprAnalyzeAggregates(NameContext*, Expr*);
1.1701 +int sqlite3ExprAnalyzeAggList(NameContext*,ExprList*);
1.1702 +Vdbe *sqlite3GetVdbe(Parse*);
1.1703 +Expr *sqlite3CreateIdExpr(Parse *, const char*);
1.1704 +void sqlite3Randomness(int, void*);
1.1705 +void sqlite3RollbackAll(sqlite3*);
1.1706 +void sqlite3CodeVerifySchema(Parse*, int);
1.1707 +void sqlite3BeginTransaction(Parse*, int);
1.1708 +void sqlite3CommitTransaction(Parse*);
1.1709 +void sqlite3RollbackTransaction(Parse*);
1.1710 +int sqlite3ExprIsConstant(Expr*);
1.1711 +int sqlite3ExprIsConstantNotJoin(Expr*);
1.1712 +int sqlite3ExprIsConstantOrFunction(Expr*);
1.1713 +int sqlite3ExprIsInteger(Expr*, int*);
1.1714 +int sqlite3IsRowid(const char*);
1.1715 +void sqlite3GenerateRowDelete(sqlite3*, Vdbe*, Table*, int, int);
1.1716 +void sqlite3GenerateRowIndexDelete(Vdbe*, Table*, int, char*);
1.1717 +void sqlite3GenerateIndexKey(Vdbe*, Index*, int);
1.1718 +void sqlite3GenerateConstraintChecks(Parse*,Table*,int,char*,int,int,int,int);
1.1719 +void sqlite3CompleteInsertion(Parse*, Table*, int, char*, int, int, int, int);
1.1720 +void sqlite3OpenTableAndIndices(Parse*, Table*, int, int);
1.1721 +void sqlite3BeginWriteOperation(Parse*, int, int);
1.1722 +Expr *sqlite3ExprDup(sqlite3*,Expr*);
1.1723 +void sqlite3TokenCopy(sqlite3*,Token*, Token*);
1.1724 +ExprList *sqlite3ExprListDup(sqlite3*,ExprList*);
1.1725 +SrcList *sqlite3SrcListDup(sqlite3*,SrcList*);
1.1726 +IdList *sqlite3IdListDup(sqlite3*,IdList*);
1.1727 +Select *sqlite3SelectDup(sqlite3*,Select*);
1.1728 +FuncDef *sqlite3FindFunction(sqlite3*,const char*,int,int,u8,int);
1.1729 +void sqlite3RegisterBuiltinFunctions(sqlite3*);
1.1730 +void sqlite3RegisterDateTimeFunctions(sqlite3*);
1.1731 +int sqlite3SafetyOn(sqlite3*);
1.1732 +int sqlite3SafetyOff(sqlite3*);
1.1733 +int sqlite3SafetyCheck(sqlite3*);
1.1734 +void sqlite3ChangeCookie(sqlite3*, Vdbe*, int);
1.1735 +
1.1736 +#ifndef SQLITE_OMIT_TRIGGER
1.1737 + void sqlite3BeginTrigger(Parse*, Token*,Token*,int,int,IdList*,SrcList*,
1.1738 + Expr*,int, int);
1.1739 + void sqlite3FinishTrigger(Parse*, TriggerStep*, Token*);
1.1740 + void sqlite3DropTrigger(Parse*, SrcList*, int);
1.1741 + void sqlite3DropTriggerPtr(Parse*, Trigger*);
1.1742 + int sqlite3TriggersExist(Parse*, Table*, int, ExprList*);
1.1743 + int sqlite3CodeRowTrigger(Parse*, int, ExprList*, int, Table *, int, int,
1.1744 + int, int);
1.1745 + void sqliteViewTriggers(Parse*, Table*, Expr*, int, ExprList*);
1.1746 + void sqlite3DeleteTriggerStep(TriggerStep*);
1.1747 + TriggerStep *sqlite3TriggerSelectStep(sqlite3*,Select*);
1.1748 + TriggerStep *sqlite3TriggerInsertStep(sqlite3*,Token*, IdList*,
1.1749 + ExprList*,Select*,int);
1.1750 + TriggerStep *sqlite3TriggerUpdateStep(sqlite3*,Token*,ExprList*, Expr*, int);
1.1751 + TriggerStep *sqlite3TriggerDeleteStep(sqlite3*,Token*, Expr*);
1.1752 + void sqlite3DeleteTrigger(Trigger*);
1.1753 + void sqlite3UnlinkAndDeleteTrigger(sqlite3*,int,const char*);
1.1754 +#else
1.1755 +# define sqlite3TriggersExist(A,B,C,D,E,F) 0
1.1756 +# define sqlite3DeleteTrigger(A)
1.1757 +# define sqlite3DropTriggerPtr(A,B)
1.1758 +# define sqlite3UnlinkAndDeleteTrigger(A,B,C)
1.1759 +# define sqlite3CodeRowTrigger(A,B,C,D,E,F,G,H,I) 0
1.1760 +#endif
1.1761 +
1.1762 +int sqlite3JoinType(Parse*, Token*, Token*, Token*);
1.1763 +void sqlite3CreateForeignKey(Parse*, ExprList*, Token*, ExprList*, int);
1.1764 +void sqlite3DeferForeignKey(Parse*, int);
1.1765 +#ifndef SQLITE_OMIT_AUTHORIZATION
1.1766 + void sqlite3AuthRead(Parse*,Expr*,Schema*,SrcList*);
1.1767 + int sqlite3AuthCheck(Parse*,int, const char*, const char*, const char*);
1.1768 + void sqlite3AuthContextPush(Parse*, AuthContext*, const char*);
1.1769 + void sqlite3AuthContextPop(AuthContext*);
1.1770 +#else
1.1771 +# define sqlite3AuthRead(a,b,c)
1.1772 +# define sqlite3AuthCheck(a,b,c,d,e) SQLITE_OK
1.1773 +# define sqlite3AuthContextPush(a,b,c)
1.1774 +# define sqlite3AuthContextPop(a) ((void)(a))
1.1775 +#endif
1.1776 +void sqlite3Attach(Parse*, Expr*, Expr*, Expr*);
1.1777 +void sqlite3Detach(Parse*, Expr*);
1.1778 +int sqlite3BtreeFactory(const sqlite3 *db, const char *zFilename,
1.1779 + int omitJournal, int nCache, int flags, Btree **ppBtree);
1.1780 +int sqlite3FixInit(DbFixer*, Parse*, int, const char*, const Token*);
1.1781 +int sqlite3FixSrcList(DbFixer*, SrcList*);
1.1782 +int sqlite3FixSelect(DbFixer*, Select*);
1.1783 +int sqlite3FixExpr(DbFixer*, Expr*);
1.1784 +int sqlite3FixExprList(DbFixer*, ExprList*);
1.1785 +int sqlite3FixTriggerStep(DbFixer*, TriggerStep*);
1.1786 +int sqlite3AtoF(const char *z, double*);
1.1787 +char *sqlite3_snprintf(int,char*,const char*,...);
1.1788 +int sqlite3GetInt32(const char *, int*);
1.1789 +int sqlite3FitsIn64Bits(const char *);
1.1790 +int sqlite3Utf16ByteLen(const void *pData, int nChar);
1.1791 +int sqlite3Utf8CharLen(const char *pData, int nByte);
1.1792 +int sqlite3Utf8Read(const u8*, const u8*, const u8**);
1.1793 +int sqlite3PutVarint(unsigned char *, u64);
1.1794 +int sqlite3GetVarint(const unsigned char *, u64 *);
1.1795 +int sqlite3GetVarint32(const unsigned char *, u32 *);
1.1796 +int sqlite3VarintLen(u64 v);
1.1797 +void sqlite3IndexAffinityStr(Vdbe *, Index *);
1.1798 +void sqlite3TableAffinityStr(Vdbe *, Table *);
1.1799 +char sqlite3CompareAffinity(Expr *pExpr, char aff2);
1.1800 +int sqlite3IndexAffinityOk(Expr *pExpr, char idx_affinity);
1.1801 +char sqlite3ExprAffinity(Expr *pExpr);
1.1802 +int sqlite3Atoi64(const char*, i64*);
1.1803 +void sqlite3Error(sqlite3*, int, const char*,...);
1.1804 +void *sqlite3HexToBlob(sqlite3*, const char *z);
1.1805 +int sqlite3TwoPartName(Parse *, Token *, Token *, Token **);
1.1806 +const char *sqlite3ErrStr(int);
1.1807 +int sqlite3ReadSchema(Parse *pParse);
1.1808 +CollSeq *sqlite3FindCollSeq(sqlite3*,u8 enc, const char *,int,int);
1.1809 +CollSeq *sqlite3LocateCollSeq(Parse *pParse, const char *zName, int nName);
1.1810 +CollSeq *sqlite3ExprCollSeq(Parse *pParse, Expr *pExpr);
1.1811 +Expr *sqlite3ExprSetColl(Parse *pParse, Expr *, Token *);
1.1812 +int sqlite3CheckCollSeq(Parse *, CollSeq *);
1.1813 +int sqlite3CheckObjectName(Parse *, const char *);
1.1814 +void sqlite3VdbeSetChanges(sqlite3 *, int);
1.1815 +
1.1816 +const void *sqlite3ValueText(sqlite3_value*, u8);
1.1817 +int sqlite3ValueBytes(sqlite3_value*, u8);
1.1818 +void sqlite3ValueSetStr(sqlite3_value*, int, const void *,u8,
1.1819 + void(*)(void*));
1.1820 +void sqlite3ValueFree(sqlite3_value*);
1.1821 +sqlite3_value *sqlite3ValueNew(sqlite3 *);
1.1822 +char *sqlite3Utf16to8(sqlite3 *, const void*, int);
1.1823 +int sqlite3ValueFromExpr(sqlite3 *, Expr *, u8, u8, sqlite3_value **);
1.1824 +void sqlite3ValueApplyAffinity(sqlite3_value *, u8, u8);
1.1825 +#ifndef SQLITE_AMALGAMATION
1.1826 +extern const unsigned char sqlite3UpperToLower[];
1.1827 +#endif
1.1828 +void sqlite3RootPageMoved(Db*, int, int);
1.1829 +void sqlite3Reindex(Parse*, Token*, Token*);
1.1830 +void sqlite3AlterFunctions(sqlite3*);
1.1831 +void sqlite3AlterRenameTable(Parse*, SrcList*, Token*);
1.1832 +int sqlite3GetToken(const unsigned char *, int *);
1.1833 +void sqlite3NestedParse(Parse*, const char*, ...);
1.1834 +void sqlite3ExpirePreparedStatements(sqlite3*);
1.1835 +void sqlite3CodeSubselect(Parse *, Expr *);
1.1836 +int sqlite3SelectResolve(Parse *, Select *, NameContext *);
1.1837 +void sqlite3ColumnDefault(Vdbe *, Table *, int);
1.1838 +void sqlite3AlterFinishAddColumn(Parse *, Token *);
1.1839 +void sqlite3AlterBeginAddColumn(Parse *, SrcList *);
1.1840 +CollSeq *sqlite3GetCollSeq(sqlite3*, CollSeq *, const char *, int);
1.1841 +char sqlite3AffinityType(const Token*);
1.1842 +void sqlite3Analyze(Parse*, Token*, Token*);
1.1843 +int sqlite3InvokeBusyHandler(BusyHandler*);
1.1844 +int sqlite3FindDb(sqlite3*, Token*);
1.1845 +int sqlite3AnalysisLoad(sqlite3*,int iDB);
1.1846 +void sqlite3DefaultRowEst(Index*);
1.1847 +void sqlite3RegisterLikeFunctions(sqlite3*, int);
1.1848 +int sqlite3IsLikeFunction(sqlite3*,Expr*,int*,char*);
1.1849 +void sqlite3AttachFunctions(sqlite3 *);
1.1850 +void sqlite3MinimumFileFormat(Parse*, int, int);
1.1851 +void sqlite3SchemaFree(void *);
1.1852 +Schema *sqlite3SchemaGet(sqlite3 *, Btree *);
1.1853 +int sqlite3SchemaToIndex(sqlite3 *db, Schema *);
1.1854 +KeyInfo *sqlite3IndexKeyinfo(Parse *, Index *);
1.1855 +int sqlite3CreateFunc(sqlite3 *, const char *, int, int, void *,
1.1856 + void (*)(sqlite3_context*,int,sqlite3_value **),
1.1857 + void (*)(sqlite3_context*,int,sqlite3_value **), void (*)(sqlite3_context*));
1.1858 +int sqlite3ApiExit(sqlite3 *db, int);
1.1859 +void sqlite3AbortOtherActiveVdbes(sqlite3 *, Vdbe *);
1.1860 +int sqlite3OpenTempDatabase(Parse *);
1.1861 +
1.1862 +
1.1863 +/*
1.1864 +** The interface to the LEMON-generated parser
1.1865 +*/
1.1866 +void *sqlite3ParserAlloc(void*(*)(size_t));
1.1867 +void sqlite3ParserFree(void*, void(*)(void*));
1.1868 +void sqlite3Parser(void*, int, Token, Parse*);
1.1869 +
1.1870 +#ifndef SQLITE_OMIT_LOAD_EXTENSION
1.1871 + void sqlite3CloseExtensions(sqlite3*);
1.1872 + int sqlite3AutoLoadExtensions(sqlite3*);
1.1873 +#else
1.1874 +# define sqlite3CloseExtensions(X)
1.1875 +# define sqlite3AutoLoadExtensions(X) SQLITE_OK
1.1876 +#endif
1.1877 +
1.1878 +#ifndef SQLITE_OMIT_SHARED_CACHE
1.1879 + void sqlite3TableLock(Parse *, int, int, u8, const char *);
1.1880 +#else
1.1881 + #define sqlite3TableLock(v,w,x,y,z)
1.1882 +#endif
1.1883 +
1.1884 +#ifdef SQLITE_TEST
1.1885 + int sqlite3Utf8To8(unsigned char*);
1.1886 +#endif
1.1887 +
1.1888 +/*
1.1889 +** The MallocDisallow() and MallocAllow() routines are like asserts.
1.1890 +** Call them around a section of code that you do not expect to do
1.1891 +** any memory allocation.
1.1892 +*/
1.1893 +#ifdef SQLITE_MEMDEBUG
1.1894 + void sqlite3MallocDisallow(void);
1.1895 + void sqlite3MallocAllow(void);
1.1896 + void sqlite3MallocBenignFailure(int);
1.1897 + void sqlite3MallocEnterBenignBlock(int isBenign);
1.1898 + void sqlite3MallocLeaveBenignBlock();
1.1899 +#else
1.1900 +# define sqlite3MallocDisallow()
1.1901 +# define sqlite3MallocAllow()
1.1902 +# define sqlite3MallocBenignFailure(x)
1.1903 +# define sqlite3MallocEnterBenignBlock(x);
1.1904 +# define sqlite3MallocLeaveBenignBlock();
1.1905 +#endif
1.1906 +
1.1907 +
1.1908 +#ifdef SQLITE_OMIT_VIRTUALTABLE
1.1909 +# define sqlite3VtabClear(X)
1.1910 +# define sqlite3VtabSync(X,Y) (Y)
1.1911 +# define sqlite3VtabRollback(X)
1.1912 +# define sqlite3VtabCommit(X)
1.1913 +#else
1.1914 + void sqlite3VtabClear(Table*);
1.1915 + int sqlite3VtabSync(sqlite3 *db, int rc);
1.1916 + int sqlite3VtabRollback(sqlite3 *db);
1.1917 + int sqlite3VtabCommit(sqlite3 *db);
1.1918 +#endif
1.1919 +void sqlite3VtabLock(sqlite3_vtab*);
1.1920 +void sqlite3VtabUnlock(sqlite3*, sqlite3_vtab*);
1.1921 +void sqlite3VtabBeginParse(Parse*, Token*, Token*, Token*);
1.1922 +void sqlite3VtabFinishParse(Parse*, Token*);
1.1923 +void sqlite3VtabArgInit(Parse*);
1.1924 +void sqlite3VtabArgExtend(Parse*, Token*);
1.1925 +int sqlite3VtabCallCreate(sqlite3*, int, const char *, char **);
1.1926 +int sqlite3VtabCallConnect(Parse*, Table*);
1.1927 +int sqlite3VtabCallDestroy(sqlite3*, int, const char *);
1.1928 +int sqlite3VtabBegin(sqlite3 *, sqlite3_vtab *);
1.1929 +FuncDef *sqlite3VtabOverloadFunction(sqlite3 *,FuncDef*, int nArg, Expr*);
1.1930 +void sqlite3InvalidFunction(sqlite3_context*,int,sqlite3_value**);
1.1931 +int sqlite3Reprepare(Vdbe*);
1.1932 +void sqlite3ExprListCheckLength(Parse*, ExprList*, int, const char*);
1.1933 +CollSeq *sqlite3BinaryCompareCollSeq(Parse *, Expr *, Expr *);
1.1934 +
1.1935 +#ifdef SQLITE_ENABLE_ATOMIC_WRITE
1.1936 + int sqlite3JournalOpen(sqlite3_vfs *, const char *, sqlite3_file *, int, int);
1.1937 + int sqlite3JournalSize(sqlite3_vfs *);
1.1938 + int sqlite3JournalCreate(sqlite3_file *);
1.1939 +#else
1.1940 + #define sqlite3JournalSize(pVfs) ((pVfs)->szOsFile)
1.1941 +#endif
1.1942 +
1.1943 +#if defined(SQLITE_TEST) || SQLITE_MAX_EXPR_DEPTH>0
1.1944 + void sqlite3ExprSetHeight(Expr *);
1.1945 + int sqlite3SelectExprHeight(Select *);
1.1946 +#else
1.1947 + #define sqlite3ExprSetHeight(x)
1.1948 +#endif
1.1949 +
1.1950 +u32 sqlite3Get4byte(const u8*);
1.1951 +void sqlite3Put4byte(u8*, u32);
1.1952 +
1.1953 +#ifdef SQLITE_SSE
1.1954 +#include "sseInt.h"
1.1955 +#endif
1.1956 +
1.1957 +#ifdef SQLITE_DEBUG
1.1958 + void sqlite3ParserTrace(FILE*, char *);
1.1959 +#endif
1.1960 +
1.1961 +/*
1.1962 +** If the SQLITE_ENABLE IOTRACE exists then the global variable
1.1963 +** sqlite3_io_trace is a pointer to a printf-like routine used to
1.1964 +** print I/O tracing messages.
1.1965 +*/
1.1966 +#ifdef SQLITE_ENABLE_IOTRACE
1.1967 +# define IOTRACE(A) if( sqlite3_io_trace ){ sqlite3_io_trace A; }
1.1968 + void sqlite3VdbeIOTraceSql(Vdbe*);
1.1969 +#else
1.1970 +# define IOTRACE(A)
1.1971 +# define sqlite3VdbeIOTraceSql(X)
1.1972 +#endif
1.1973 +SQLITE_EXTERN void (*sqlite3_io_trace)(const char*,...);
1.1974 +
1.1975 +#endif
