sqliteInt.h
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- /*
- ** 2001 September 15
- **
- ** The author disclaims copyright to this source code. In place of
- ** a legal notice, here is a blessing:
- **
- ** May you do good and not evil.
- ** May you find forgiveness for yourself and forgive others.
- ** May you share freely, never taking more than you give.
- **
- *************************************************************************
- ** Internal interface definitions for SQLite.
- **
- ** @(#) $Id: sqliteInt.h,v 1.693 2008/04/15 14:36:42 drh Exp $
- */
- #ifndef _SQLITEINT_H_
- #define _SQLITEINT_H_
- /*
- ** Include the configuration header output by 'configure' if it was run
- ** (otherwise we get an empty default).
- */
- #include "config.h"
- #include "sqliteLimit.h"
- /* Disable nuisance warnings on Borland compilers */
- #if defined(__BORLANDC__)
- #pragma warn -rch /* unreachable code */
- #pragma warn -ccc /* Condition is always true or false */
- #pragma warn -aus /* Assigned value is never used */
- #pragma warn -csu /* Comparing signed and unsigned */
- #pragma warn -spa /* Suspicous pointer arithmetic */
- #endif
- /* Needed for various definitions... */
- #define _GNU_SOURCE
- /*
- ** Include standard header files as necessary
- */
- #ifdef HAVE_STDINT_H
- #include <stdint.h>
- #endif
- #ifdef HAVE_INTTYPES_H
- #include <inttypes.h>
- #endif
- /*
- ** If possible, use the C99 intptr_t type to define an integral type of
- ** equivalent size to a pointer. (Technically it's >= sizeof(void *), but
- ** practically it's == sizeof(void *)). We fall back to an int if this type
- ** isn't defined.
- */
- #ifdef HAVE_INTPTR_T
- typedef intptr_t sqlite3_intptr_t;
- #else
- typedef int sqlite3_intptr_t;
- #endif
- /*
- ** A macro used to aid in coverage testing. When doing coverage
- ** testing, the condition inside the argument must be evaluated
- ** both true and false in order to get full branch coverage.
- ** This macro can be inserted to ensure adequate test coverage
- ** in places where simple condition/decision coverage is inadequate.
- */
- #ifdef SQLITE_COVERAGE_TEST
- void sqlite3Coverage(int);
- # define testcase(X) if( X ){ sqlite3Coverage(__LINE__); }
- #else
- # define testcase(X)
- #endif
- /*
- ** The macro unlikely() is a hint that surrounds a boolean
- ** expression that is usually false. Macro likely() surrounds
- ** a boolean expression that is usually true. GCC is able to
- ** use these hints to generate better code, sometimes.
- */
- #if defined(__GNUC__) && 0
- # define likely(X) __builtin_expect((X),1)
- # define unlikely(X) __builtin_expect((X),0)
- #else
- # define likely(X) !!(X)
- # define unlikely(X) !!(X)
- #endif
- /*
- ** These #defines should enable >2GB file support on Posix if the
- ** underlying operating system supports it. If the OS lacks
- ** large file support, or if the OS is windows, these should be no-ops.
- **
- ** Ticket #2739: The _LARGEFILE_SOURCE macro must appear before any
- ** system #includes. Hence, this block of code must be the very first
- ** code in all source files.
- **
- ** Large file support can be disabled using the -DSQLITE_DISABLE_LFS switch
- ** on the compiler command line. This is necessary if you are compiling
- ** on a recent machine (ex: RedHat 7.2) but you want your code to work
- ** on an older machine (ex: RedHat 6.0). If you compile on RedHat 7.2
- ** without this option, LFS is enable. But LFS does not exist in the kernel
- ** in RedHat 6.0, so the code won't work. Hence, for maximum binary
- ** portability you should omit LFS.
- **
- ** Similar is true for MacOS. LFS is only supported on MacOS 9 and later.
- */
- #ifndef SQLITE_DISABLE_LFS
- # define _LARGE_FILE 1
- # ifndef _FILE_OFFSET_BITS
- # define _FILE_OFFSET_BITS 64
- # endif
- # define _LARGEFILE_SOURCE 1
- #endif
- /*
- ** The SQLITE_THREADSAFE macro must be defined as either 0 or 1.
- ** Older versions of SQLite used an optional THREADSAFE macro.
- ** We support that for legacy
- */
- #if !defined(SQLITE_THREADSAFE)
- #if defined(THREADSAFE)
- # define SQLITE_THREADSAFE THREADSAFE
- #else
- # define SQLITE_THREADSAFE 0
- #endif
- #endif
- /*
- ** Exactly one of the following macros must be defined in order to
- ** specify which memory allocation subsystem to use.
- **
- ** SQLITE_SYSTEM_MALLOC // Use normal system malloc()
- ** SQLITE_MEMDEBUG // Debugging version of system malloc()
- ** SQLITE_MEMORY_SIZE // internal allocator #1
- ** SQLITE_MMAP_HEAP_SIZE // internal mmap() allocator
- ** SQLITE_POW2_MEMORY_SIZE // internal power-of-two allocator
- **
- ** If none of the above are defined, then set SQLITE_SYSTEM_MALLOC as
- ** the default.
- */
- #if defined(SQLITE_SYSTEM_MALLOC)+defined(SQLITE_MEMDEBUG)+
- defined(SQLITE_MEMORY_SIZE)+defined(SQLITE_MMAP_HEAP_SIZE)+
- defined(SQLITE_POW2_MEMORY_SIZE)>1
- # error "At most one of the following compile-time configuration options
- is allows: SQLITE_SYSTEM_MALLOC, SQLITE_MEMDEBUG, SQLITE_MEMORY_SIZE,
- SQLITE_MMAP_HEAP_SIZE, SQLITE_POW2_MEMORY_SIZE"
- #endif
- #if defined(SQLITE_SYSTEM_MALLOC)+defined(SQLITE_MEMDEBUG)+
- defined(SQLITE_MEMORY_SIZE)+defined(SQLITE_MMAP_HEAP_SIZE)+
- defined(SQLITE_POW2_MEMORY_SIZE)==0
- # define SQLITE_SYSTEM_MALLOC 1
- #endif
- /*
- ** If SQLITE_MALLOC_SOFT_LIMIT is defined, then try to keep the
- ** sizes of memory allocations below this value where possible.
- */
- #if defined(SQLITE_POW2_MEMORY_SIZE) && !defined(SQLITE_MALLOC_SOFT_LIMIT)
- # define SQLITE_MALLOC_SOFT_LIMIT 1024
- #endif
- /*
- ** We need to define _XOPEN_SOURCE as follows in order to enable
- ** recursive mutexes on most unix systems. But Mac OS X is different.
- ** The _XOPEN_SOURCE define causes problems for Mac OS X we are told,
- ** so it is omitted there. See ticket #2673.
- **
- ** Later we learn that _XOPEN_SOURCE is poorly or incorrectly
- ** implemented on some systems. So we avoid defining it at all
- ** if it is already defined or if it is unneeded because we are
- ** not doing a threadsafe build. Ticket #2681.
- **
- ** See also ticket #2741.
- */
- #if !defined(_XOPEN_SOURCE) && !defined(__DARWIN__) && !defined(__APPLE__) && SQLITE_THREADSAFE
- # define _XOPEN_SOURCE 500 /* Needed to enable pthread recursive mutexes */
- #endif
- #if defined(SQLITE_TCL) || defined(TCLSH)
- # include <tcl.h>
- #endif
- /*
- ** Many people are failing to set -DNDEBUG=1 when compiling SQLite.
- ** Setting NDEBUG makes the code smaller and run faster. So the following
- ** lines are added to automatically set NDEBUG unless the -DSQLITE_DEBUG=1
- ** option is set. Thus NDEBUG becomes an opt-in rather than an opt-out
- ** feature.
- */
- #if !defined(NDEBUG) && !defined(SQLITE_DEBUG)
- # define NDEBUG 1
- #endif
- #include "sqlite3.h"
- #include "hash.h"
- #include "parse.h"
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include <assert.h>
- #include <stddef.h>
- #define sqlite3_isnan(X) ((X)!=(X))
- /*
- ** If compiling for a processor that lacks floating point support,
- ** substitute integer for floating-point
- */
- #ifdef SQLITE_OMIT_FLOATING_POINT
- # define double sqlite_int64
- # define LONGDOUBLE_TYPE sqlite_int64
- # ifndef SQLITE_BIG_DBL
- # define SQLITE_BIG_DBL (0x7fffffffffffffff)
- # endif
- # define SQLITE_OMIT_DATETIME_FUNCS 1
- # define SQLITE_OMIT_TRACE 1
- # undef SQLITE_MIXED_ENDIAN_64BIT_FLOAT
- #endif
- #ifndef SQLITE_BIG_DBL
- # define SQLITE_BIG_DBL (1e99)
- #endif
- /*
- ** OMIT_TEMPDB is set to 1 if SQLITE_OMIT_TEMPDB is defined, or 0
- ** afterward. Having this macro allows us to cause the C compiler
- ** to omit code used by TEMP tables without messy #ifndef statements.
- */
- #ifdef SQLITE_OMIT_TEMPDB
- #define OMIT_TEMPDB 1
- #else
- #define OMIT_TEMPDB 0
- #endif
- /*
- ** If the following macro is set to 1, then NULL values are considered
- ** distinct when determining whether or not two entries are the same
- ** in a UNIQUE index. This is the way PostgreSQL, Oracle, DB2, MySQL,
- ** OCELOT, and Firebird all work. The SQL92 spec explicitly says this
- ** is the way things are suppose to work.
- **
- ** If the following macro is set to 0, the NULLs are indistinct for
- ** a UNIQUE index. In this mode, you can only have a single NULL entry
- ** for a column declared UNIQUE. This is the way Informix and SQL Server
- ** work.
- */
- #define NULL_DISTINCT_FOR_UNIQUE 1
- /*
- ** The "file format" number is an integer that is incremented whenever
- ** the VDBE-level file format changes. The following macros define the
- ** the default file format for new databases and the maximum file format
- ** that the library can read.
- */
- #define SQLITE_MAX_FILE_FORMAT 4
- #ifndef SQLITE_DEFAULT_FILE_FORMAT
- # define SQLITE_DEFAULT_FILE_FORMAT 1
- #endif
- /*
- ** Provide a default value for TEMP_STORE in case it is not specified
- ** on the command-line
- */
- #ifndef TEMP_STORE
- # define TEMP_STORE 1
- #endif
- /*
- ** GCC does not define the offsetof() macro so we'll have to do it
- ** ourselves.
- */
- #ifndef offsetof
- #define offsetof(STRUCTURE,FIELD) ((int)((char*)&((STRUCTURE*)0)->FIELD))
- #endif
- /*
- ** Check to see if this machine uses EBCDIC. (Yes, believe it or
- ** not, there are still machines out there that use EBCDIC.)
- */
- #if 'A' == '301'
- # define SQLITE_EBCDIC 1
- #else
- # define SQLITE_ASCII 1
- #endif
- /*
- ** Integers of known sizes. These typedefs might change for architectures
- ** where the sizes very. Preprocessor macros are available so that the
- ** types can be conveniently redefined at compile-type. Like this:
- **
- ** cc '-DUINTPTR_TYPE=long long int' ...
- */
- #ifndef UINT32_TYPE
- # ifdef HAVE_UINT32_T
- # define UINT32_TYPE uint32_t
- # else
- # define UINT32_TYPE unsigned int
- # endif
- #endif
- #ifndef UINT16_TYPE
- # ifdef HAVE_UINT16_T
- # define UINT16_TYPE uint16_t
- # else
- # define UINT16_TYPE unsigned short int
- # endif
- #endif
- #ifndef INT16_TYPE
- # ifdef HAVE_INT16_T
- # define INT16_TYPE int16_t
- # else
- # define INT16_TYPE short int
- # endif
- #endif
- #ifndef UINT8_TYPE
- # ifdef HAVE_UINT8_T
- # define UINT8_TYPE uint8_t
- # else
- # define UINT8_TYPE unsigned char
- # endif
- #endif
- #ifndef INT8_TYPE
- # ifdef HAVE_INT8_T
- # define INT8_TYPE int8_t
- # else
- # define INT8_TYPE signed char
- # endif
- #endif
- #ifndef LONGDOUBLE_TYPE
- # define LONGDOUBLE_TYPE long double
- #endif
- typedef sqlite_int64 i64; /* 8-byte signed integer */
- typedef sqlite_uint64 u64; /* 8-byte unsigned integer */
- typedef UINT32_TYPE u32; /* 4-byte unsigned integer */
- typedef UINT16_TYPE u16; /* 2-byte unsigned integer */
- typedef INT16_TYPE i16; /* 2-byte signed integer */
- typedef UINT8_TYPE u8; /* 1-byte unsigned integer */
- typedef UINT8_TYPE i8; /* 1-byte signed integer */
- /*
- ** Macros to determine whether the machine is big or little endian,
- ** evaluated at runtime.
- */
- #ifdef SQLITE_AMALGAMATION
- const int sqlite3one;
- #else
- extern const int sqlite3one;
- #endif
- #if defined(i386) || defined(__i386__) || defined(_M_IX86)
- # define SQLITE_BIGENDIAN 0
- # define SQLITE_LITTLEENDIAN 1
- # define SQLITE_UTF16NATIVE SQLITE_UTF16LE
- #else
- # define SQLITE_BIGENDIAN (*(char *)(&sqlite3one)==0)
- # define SQLITE_LITTLEENDIAN (*(char *)(&sqlite3one)==1)
- # define SQLITE_UTF16NATIVE (SQLITE_BIGENDIAN?SQLITE_UTF16BE:SQLITE_UTF16LE)
- #endif
- /*
- ** An instance of the following structure is used to store the busy-handler
- ** callback for a given sqlite handle.
- **
- ** The sqlite.busyHandler member of the sqlite struct contains the busy
- ** callback for the database handle. Each pager opened via the sqlite
- ** handle is passed a pointer to sqlite.busyHandler. The busy-handler
- ** callback is currently invoked only from within pager.c.
- */
- typedef struct BusyHandler BusyHandler;
- struct BusyHandler {
- int (*xFunc)(void *,int); /* The busy callback */
- void *pArg; /* First arg to busy callback */
- int nBusy; /* Incremented with each busy call */
- };
- /*
- ** Name of the master database table. The master database table
- ** is a special table that holds the names and attributes of all
- ** user tables and indices.
- */
- #define MASTER_NAME "sqlite_master"
- #define TEMP_MASTER_NAME "sqlite_temp_master"
- /*
- ** The root-page of the master database table.
- */
- #define MASTER_ROOT 1
- /*
- ** The name of the schema table.
- */
- #define SCHEMA_TABLE(x) ((!OMIT_TEMPDB)&&(x==1)?TEMP_MASTER_NAME:MASTER_NAME)
- /*
- ** A convenience macro that returns the number of elements in
- ** an array.
- */
- #define ArraySize(X) (sizeof(X)/sizeof(X[0]))
- /*
- ** Forward references to structures
- */
- typedef struct AggInfo AggInfo;
- typedef struct AuthContext AuthContext;
- typedef struct Bitvec Bitvec;
- typedef struct CollSeq CollSeq;
- typedef struct Column Column;
- typedef struct Db Db;
- typedef struct Schema Schema;
- typedef struct Expr Expr;
- typedef struct ExprList ExprList;
- typedef struct FKey FKey;
- typedef struct FuncDef FuncDef;
- typedef struct IdList IdList;
- typedef struct Index Index;
- typedef struct KeyClass KeyClass;
- typedef struct KeyInfo KeyInfo;
- typedef struct Module Module;
- typedef struct NameContext NameContext;
- typedef struct Parse Parse;
- typedef struct Select Select;
- typedef struct SrcList SrcList;
- typedef struct StrAccum StrAccum;
- typedef struct Table Table;
- typedef struct TableLock TableLock;
- typedef struct Token Token;
- typedef struct TriggerStack TriggerStack;
- typedef struct TriggerStep TriggerStep;
- typedef struct Trigger Trigger;
- typedef struct WhereInfo WhereInfo;
- typedef struct WhereLevel WhereLevel;
- /*
- ** Defer sourcing vdbe.h and btree.h until after the "u8" and
- ** "BusyHandler" typedefs. vdbe.h also requires a few of the opaque
- ** pointer types (i.e. FuncDef) defined above.
- */
- #include "btree.h"
- #include "vdbe.h"
- #include "pager.h"
- #include "os.h"
- #include "mutex.h"
- /*
- ** Each database file to be accessed by the system is an instance
- ** of the following structure. There are normally two of these structures
- ** in the sqlite.aDb[] array. aDb[0] is the main database file and
- ** aDb[1] is the database file used to hold temporary tables. Additional
- ** databases may be attached.
- */
- struct Db {
- char *zName; /* Name of this database */
- Btree *pBt; /* The B*Tree structure for this database file */
- u8 inTrans; /* 0: not writable. 1: Transaction. 2: Checkpoint */
- u8 safety_level; /* How aggressive at synching data to disk */
- void *pAux; /* Auxiliary data. Usually NULL */
- void (*xFreeAux)(void*); /* Routine to free pAux */
- Schema *pSchema; /* Pointer to database schema (possibly shared) */
- };
- /*
- ** An instance of the following structure stores a database schema.
- **
- ** If there are no virtual tables configured in this schema, the
- ** Schema.db variable is set to NULL. After the first virtual table
- ** has been added, it is set to point to the database connection
- ** used to create the connection. Once a virtual table has been
- ** added to the Schema structure and the Schema.db variable populated,
- ** only that database connection may use the Schema to prepare
- ** statements.
- */
- struct Schema {
- int schema_cookie; /* Database schema version number for this file */
- Hash tblHash; /* All tables indexed by name */
- Hash idxHash; /* All (named) indices indexed by name */
- Hash trigHash; /* All triggers indexed by name */
- Hash aFKey; /* Foreign keys indexed by to-table */
- Table *pSeqTab; /* The sqlite_sequence table used by AUTOINCREMENT */
- u8 file_format; /* Schema format version for this file */
- u8 enc; /* Text encoding used by this database */
- u16 flags; /* Flags associated with this schema */
- int cache_size; /* Number of pages to use in the cache */
- #ifndef SQLITE_OMIT_VIRTUALTABLE
- sqlite3 *db; /* "Owner" connection. See comment above */
- #endif
- };
- /*
- ** These macros can be used to test, set, or clear bits in the
- ** Db.flags field.
- */
- #define DbHasProperty(D,I,P) (((D)->aDb[I].pSchema->flags&(P))==(P))
- #define DbHasAnyProperty(D,I,P) (((D)->aDb[I].pSchema->flags&(P))!=0)
- #define DbSetProperty(D,I,P) (D)->aDb[I].pSchema->flags|=(P)
- #define DbClearProperty(D,I,P) (D)->aDb[I].pSchema->flags&=~(P)
- /*
- ** Allowed values for the DB.flags field.
- **
- ** The DB_SchemaLoaded flag is set after the database schema has been
- ** read into internal hash tables.
- **
- ** DB_UnresetViews means that one or more views have column names that
- ** have been filled out. If the schema changes, these column names might
- ** changes and so the view will need to be reset.
- */
- #define DB_SchemaLoaded 0x0001 /* The schema has been loaded */
- #define DB_UnresetViews 0x0002 /* Some views have defined column names */
- #define DB_Empty 0x0004 /* The file is empty (length 0 bytes) */
- /*
- ** The number of different kinds of things that can be limited
- ** using the sqlite3_limit() interface.
- */
- #define SQLITE_N_LIMIT (SQLITE_LIMIT_VARIABLE_NUMBER+1)
- /*
- ** Each database is an instance of the following structure.
- **
- ** The sqlite.lastRowid records the last insert rowid generated by an
- ** insert statement. Inserts on views do not affect its value. Each
- ** trigger has its own context, so that lastRowid can be updated inside
- ** triggers as usual. The previous value will be restored once the trigger
- ** exits. Upon entering a before or instead of trigger, lastRowid is no
- ** longer (since after version 2.8.12) reset to -1.
- **
- ** The sqlite.nChange does not count changes within triggers and keeps no
- ** context. It is reset at start of sqlite3_exec.
- ** The sqlite.lsChange represents the number of changes made by the last
- ** insert, update, or delete statement. It remains constant throughout the
- ** length of a statement and is then updated by OP_SetCounts. It keeps a
- ** context stack just like lastRowid so that the count of changes
- ** within a trigger is not seen outside the trigger. Changes to views do not
- ** affect the value of lsChange.
- ** The sqlite.csChange keeps track of the number of current changes (since
- ** the last statement) and is used to update sqlite_lsChange.
- **
- ** The member variables sqlite.errCode, sqlite.zErrMsg and sqlite.zErrMsg16
- ** store the most recent error code and, if applicable, string. The
- ** internal function sqlite3Error() is used to set these variables
- ** consistently.
- */
- struct sqlite3 {
- sqlite3_vfs *pVfs; /* OS Interface */
- int nDb; /* Number of backends currently in use */
- Db *aDb; /* All backends */
- int flags; /* Miscellanous flags. See below */
- int openFlags; /* Flags passed to sqlite3_vfs.xOpen() */
- int errCode; /* Most recent error code (SQLITE_*) */
- int errMask; /* & result codes with this before returning */
- u8 autoCommit; /* The auto-commit flag. */
- u8 temp_store; /* 1: file 2: memory 0: default */
- u8 mallocFailed; /* True if we have seen a malloc failure */
- signed char nextAutovac; /* Autovac setting after VACUUM if >=0 */
- int nextPagesize; /* Pagesize after VACUUM if >0 */
- int nTable; /* Number of tables in the database */
- CollSeq *pDfltColl; /* The default collating sequence (BINARY) */
- i64 lastRowid; /* ROWID of most recent insert (see above) */
- i64 priorNewRowid; /* Last randomly generated ROWID */
- int magic; /* Magic number for detect library misuse */
- int nChange; /* Value returned by sqlite3_changes() */
- int nTotalChange; /* Value returned by sqlite3_total_changes() */
- sqlite3_mutex *mutex; /* Connection mutex */
- int aLimit[SQLITE_N_LIMIT]; /* Limits */
- struct sqlite3InitInfo { /* Information used during initialization */
- int iDb; /* When back is being initialized */
- int newTnum; /* Rootpage of table being initialized */
- u8 busy; /* TRUE if currently initializing */
- } init;
- int nExtension; /* Number of loaded extensions */
- void **aExtension; /* Array of shared libraray handles */
- struct Vdbe *pVdbe; /* List of active virtual machines */
- int activeVdbeCnt; /* Number of vdbes currently executing */
- void (*xTrace)(void*,const char*); /* Trace function */
- void *pTraceArg; /* Argument to the trace function */
- void (*xProfile)(void*,const char*,u64); /* Profiling function */
- void *pProfileArg; /* Argument to profile function */
- void *pCommitArg; /* Argument to xCommitCallback() */
- int (*xCommitCallback)(void*); /* Invoked at every commit. */
- void *pRollbackArg; /* Argument to xRollbackCallback() */
- void (*xRollbackCallback)(void*); /* Invoked at every commit. */
- void *pUpdateArg;
- void (*xUpdateCallback)(void*,int, const char*,const char*,sqlite_int64);
- void(*xCollNeeded)(void*,sqlite3*,int eTextRep,const char*);
- void(*xCollNeeded16)(void*,sqlite3*,int eTextRep,const void*);
- void *pCollNeededArg;
- sqlite3_value *pErr; /* Most recent error message */
- char *zErrMsg; /* Most recent error message (UTF-8 encoded) */
- char *zErrMsg16; /* Most recent error message (UTF-16 encoded) */
- union {
- int isInterrupted; /* True if sqlite3_interrupt has been called */
- double notUsed1; /* Spacer */
- } u1;
- #ifndef SQLITE_OMIT_AUTHORIZATION
- int (*xAuth)(void*,int,const char*,const char*,const char*,const char*);
- /* Access authorization function */
- void *pAuthArg; /* 1st argument to the access auth function */
- #endif
- #ifndef SQLITE_OMIT_PROGRESS_CALLBACK
- int (*xProgress)(void *); /* The progress callback */
- void *pProgressArg; /* Argument to the progress callback */
- int nProgressOps; /* Number of opcodes for progress callback */
- #endif
- #ifndef SQLITE_OMIT_VIRTUALTABLE
- Hash aModule; /* populated by sqlite3_create_module() */
- Table *pVTab; /* vtab with active Connect/Create method */
- sqlite3_vtab **aVTrans; /* Virtual tables with open transactions */
- int nVTrans; /* Allocated size of aVTrans */
- #endif
- Hash aFunc; /* All functions that can be in SQL exprs */
- Hash aCollSeq; /* All collating sequences */
- BusyHandler busyHandler; /* Busy callback */
- int busyTimeout; /* Busy handler timeout, in msec */
- Db aDbStatic[2]; /* Static space for the 2 default backends */
- #ifdef SQLITE_SSE
- sqlite3_stmt *pFetch; /* Used by SSE to fetch stored statements */
- #endif
- u8 dfltLockMode; /* Default locking-mode for attached dbs */
- };
- /*
- ** A macro to discover the encoding of a database.
- */
- #define ENC(db) ((db)->aDb[0].pSchema->enc)
- /*
- ** Possible values for the sqlite.flags and or Db.flags fields.
- **
- ** On sqlite.flags, the SQLITE_InTrans value means that we have
- ** executed a BEGIN. On Db.flags, SQLITE_InTrans means a statement
- ** transaction is active on that particular database file.
- */
- #define SQLITE_VdbeTrace 0x00000001 /* True to trace VDBE execution */
- #define SQLITE_InTrans 0x00000008 /* True if in a transaction */
- #define SQLITE_InternChanges 0x00000010 /* Uncommitted Hash table changes */
- #define SQLITE_FullColNames 0x00000020 /* Show full column names on SELECT */
- #define SQLITE_ShortColNames 0x00000040 /* Show short columns names */
- #define SQLITE_CountRows 0x00000080 /* Count rows changed by INSERT, */
- /* DELETE, or UPDATE and return */
- /* the count using a callback. */
- #define SQLITE_NullCallback 0x00000100 /* Invoke the callback once if the */
- /* result set is empty */
- #define SQLITE_SqlTrace 0x00000200 /* Debug print SQL as it executes */
- #define SQLITE_VdbeListing 0x00000400 /* Debug listings of VDBE programs */
- #define SQLITE_WriteSchema 0x00000800 /* OK to update SQLITE_MASTER */
- #define SQLITE_NoReadlock 0x00001000 /* Readlocks are omitted when
- ** accessing read-only databases */
- #define SQLITE_IgnoreChecks 0x00002000 /* Do not enforce check constraints */
- #define SQLITE_ReadUncommitted 0x00004000 /* For shared-cache mode */
- #define SQLITE_LegacyFileFmt 0x00008000 /* Create new databases in format 1 */
- #define SQLITE_FullFSync 0x00010000 /* Use full fsync on the backend */
- #define SQLITE_LoadExtension 0x00020000 /* Enable load_extension */
- #define SQLITE_RecoveryMode 0x00040000 /* Ignore schema errors */
- #define SQLITE_SharedCache 0x00080000 /* Cache sharing is enabled */
- #define SQLITE_Vtab 0x00100000 /* There exists a virtual table */
- /*
- ** Possible values for the sqlite.magic field.
- ** The numbers are obtained at random and have no special meaning, other
- ** than being distinct from one another.
- */
- #define SQLITE_MAGIC_OPEN 0xa029a697 /* Database is open */
- #define SQLITE_MAGIC_CLOSED 0x9f3c2d33 /* Database is closed */
- #define SQLITE_MAGIC_SICK 0x4b771290 /* Error and awaiting close */
- #define SQLITE_MAGIC_BUSY 0xf03b7906 /* Database currently in use */
- #define SQLITE_MAGIC_ERROR 0xb5357930 /* An SQLITE_MISUSE error occurred */
- /*
- ** Each SQL function is defined by an instance of the following
- ** structure. A pointer to this structure is stored in the sqlite.aFunc
- ** hash table. When multiple functions have the same name, the hash table
- ** points to a linked list of these structures.
- */
- struct FuncDef {
- i16 nArg; /* Number of arguments. -1 means unlimited */
- u8 iPrefEnc; /* Preferred text encoding (SQLITE_UTF8, 16LE, 16BE) */
- u8 needCollSeq; /* True if sqlite3GetFuncCollSeq() might be called */
- u8 flags; /* Some combination of SQLITE_FUNC_* */
- void *pUserData; /* User data parameter */
- FuncDef *pNext; /* Next function with same name */
- void (*xFunc)(sqlite3_context*,int,sqlite3_value**); /* Regular function */
- void (*xStep)(sqlite3_context*,int,sqlite3_value**); /* Aggregate step */
- void (*xFinalize)(sqlite3_context*); /* Aggregate finializer */
- char zName[1]; /* SQL name of the function. MUST BE LAST */
- };
- /*
- ** Each SQLite module (virtual table definition) is defined by an
- ** instance of the following structure, stored in the sqlite3.aModule
- ** hash table.
- */
- struct Module {
- const sqlite3_module *pModule; /* Callback pointers */
- const char *zName; /* Name passed to create_module() */
- void *pAux; /* pAux passed to create_module() */
- void (*xDestroy)(void *); /* Module destructor function */
- };
- /*
- ** Possible values for FuncDef.flags
- */
- #define SQLITE_FUNC_LIKE 0x01 /* Candidate for the LIKE optimization */
- #define SQLITE_FUNC_CASE 0x02 /* Case-sensitive LIKE-type function */
- #define SQLITE_FUNC_EPHEM 0x04 /* Ephermeral. Delete with VDBE */
- /*
- ** information about each column of an SQL table is held in an instance
- ** of this structure.
- */
- struct Column {
- char *zName; /* Name of this column */
- Expr *pDflt; /* Default value of this column */
- char *zType; /* Data type for this column */
- char *zColl; /* Collating sequence. If NULL, use the default */
- u8 notNull; /* True if there is a NOT NULL constraint */
- u8 isPrimKey; /* True if this column is part of the PRIMARY KEY */
- char affinity; /* One of the SQLITE_AFF_... values */
- #ifndef SQLITE_OMIT_VIRTUALTABLE
- u8 isHidden; /* True if this column is 'hidden' */
- #endif
- };
- /*
- ** A "Collating Sequence" is defined by an instance of the following
- ** structure. Conceptually, a collating sequence consists of a name and
- ** a comparison routine that defines the order of that sequence.
- **
- ** There may two seperate implementations of the collation function, one
- ** that processes text in UTF-8 encoding (CollSeq.xCmp) and another that
- ** processes text encoded in UTF-16 (CollSeq.xCmp16), using the machine
- ** native byte order. When a collation sequence is invoked, SQLite selects
- ** the version that will require the least expensive encoding
- ** translations, if any.
- **
- ** The CollSeq.pUser member variable is an extra parameter that passed in
- ** as the first argument to the UTF-8 comparison function, xCmp.
- ** CollSeq.pUser16 is the equivalent for the UTF-16 comparison function,
- ** xCmp16.
- **
- ** If both CollSeq.xCmp and CollSeq.xCmp16 are NULL, it means that the
- ** collating sequence is undefined. Indices built on an undefined
- ** collating sequence may not be read or written.
- */
- struct CollSeq {
- char *zName; /* Name of the collating sequence, UTF-8 encoded */
- u8 enc; /* Text encoding handled by xCmp() */
- u8 type; /* One of the SQLITE_COLL_... values below */
- void *pUser; /* First argument to xCmp() */
- int (*xCmp)(void*,int, const void*, int, const void*);
- void (*xDel)(void*); /* Destructor for pUser */
- };
- /*
- ** Allowed values of CollSeq flags:
- */
- #define SQLITE_COLL_BINARY 1 /* The default memcmp() collating sequence */
- #define SQLITE_COLL_NOCASE 2 /* The built-in NOCASE collating sequence */
- #define SQLITE_COLL_REVERSE 3 /* The built-in REVERSE collating sequence */
- #define SQLITE_COLL_USER 0 /* Any other user-defined collating sequence */
- /*
- ** A sort order can be either ASC or DESC.
- */
- #define SQLITE_SO_ASC 0 /* Sort in ascending order */
- #define SQLITE_SO_DESC 1 /* Sort in ascending order */
- /*
- ** Column affinity types.
- **
- ** These used to have mnemonic name like 'i' for SQLITE_AFF_INTEGER and
- ** 't' for SQLITE_AFF_TEXT. But we can save a little space and improve
- ** the speed a little by number the values consecutively.
- **
- ** But rather than start with 0 or 1, we begin with 'a'. That way,
- ** when multiple affinity types are concatenated into a string and
- ** used as the P4 operand, they will be more readable.
- **
- ** Note also that the numeric types are grouped together so that testing
- ** for a numeric type is a single comparison.
- */
- #define SQLITE_AFF_TEXT 'a'
- #define SQLITE_AFF_NONE 'b'
- #define SQLITE_AFF_NUMERIC 'c'
- #define SQLITE_AFF_INTEGER 'd'
- #define SQLITE_AFF_REAL 'e'
- #define sqlite3IsNumericAffinity(X) ((X)>=SQLITE_AFF_NUMERIC)
- /*
- ** The SQLITE_AFF_MASK values masks off the significant bits of an
- ** affinity value.
- */
- #define SQLITE_AFF_MASK 0x67
- /*
- ** Additional bit values that can be ORed with an affinity without
- ** changing the affinity.
- */
- #define SQLITE_JUMPIFNULL 0x08 /* jumps if either operand is NULL */
- #define SQLITE_NULLEQUAL 0x10 /* compare NULLs equal */
- #define SQLITE_STOREP2 0x80 /* Store result in reg[P2] rather than jump */
- /*
- ** Each SQL table is represented in memory by an instance of the
- ** following structure.
- **
- ** Table.zName is the name of the table. The case of the original
- ** CREATE TABLE statement is stored, but case is not significant for
- ** comparisons.
- **
- ** Table.nCol is the number of columns in this table. Table.aCol is a
- ** pointer to an array of Column structures, one for each column.
- **
- ** If the table has an INTEGER PRIMARY KEY, then Table.iPKey is the index of
- ** the column that is that key. Otherwise Table.iPKey is negative. Note
- ** that the datatype of the PRIMARY KEY must be INTEGER for this field to
- ** be set. An INTEGER PRIMARY KEY is used as the rowid for each row of
- ** the table. If a table has no INTEGER PRIMARY KEY, then a random rowid
- ** is generated for each row of the table. Table.hasPrimKey is true if
- ** the table has any PRIMARY KEY, INTEGER or otherwise.
- **
- ** Table.tnum is the page number for the root BTree page of the table in the
- ** database file. If Table.iDb is the index of the database table backend
- ** in sqlite.aDb[]. 0 is for the main database and 1 is for the file that
- ** holds temporary tables and indices. If Table.isEphem
- ** is true, then the table is stored in a file that is automatically deleted
- ** when the VDBE cursor to the table is closed. In this case Table.tnum
- ** refers VDBE cursor number that holds the table open, not to the root
- ** page number. Transient tables are used to hold the results of a
- ** sub-query that appears instead of a real table name in the FROM clause
- ** of a SELECT statement.
- */
- struct Table {
- char *zName; /* Name of the table */
- int nCol; /* Number of columns in this table */
- Column *aCol; /* Information about each column */
- int iPKey; /* If not less then 0, use aCol[iPKey] as the primary key */
- Index *pIndex; /* List of SQL indexes on this table. */
- int tnum; /* Root BTree node for this table (see note above) */
- Select *pSelect; /* NULL for tables. Points to definition if a view. */
- int nRef; /* Number of pointers to this Table */
- Trigger *pTrigger; /* List of SQL triggers on this table */
- FKey *pFKey; /* Linked list of all foreign keys in this table */
- char *zColAff; /* String defining the affinity of each column */
- #ifndef SQLITE_OMIT_CHECK
- Expr *pCheck; /* The AND of all CHECK constraints */
- #endif
- #ifndef SQLITE_OMIT_ALTERTABLE
- int addColOffset; /* Offset in CREATE TABLE statement to add a new column */
- #endif
- u8 readOnly; /* True if this table should not be written by the user */
- u8 isEphem; /* True if created using OP_OpenEphermeral */
- u8 hasPrimKey; /* True if there exists a primary key */
- u8 keyConf; /* What to do in case of uniqueness conflict on iPKey */
- u8 autoInc; /* True if the integer primary key is autoincrement */
- #ifndef SQLITE_OMIT_VIRTUALTABLE
- u8 isVirtual; /* True if this is a virtual table */
- u8 isCommit; /* True once the CREATE TABLE has been committed */
- Module *pMod; /* Pointer to the implementation of the module */
- sqlite3_vtab *pVtab; /* Pointer to the module instance */
- int nModuleArg; /* Number of arguments to the module */
- char **azModuleArg; /* Text of all module args. [0] is module name */
- #endif
- Schema *pSchema; /* Schema that contains this table */
- };
- /*
- ** Test to see whether or not a table is a virtual table. This is
- ** done as a macro so that it will be optimized out when virtual
- ** table support is omitted from the build.
- */
- #ifndef SQLITE_OMIT_VIRTUALTABLE
- # define IsVirtual(X) ((X)->isVirtual)
- # define IsHiddenColumn(X) ((X)->isHidden)
- #else
- # define IsVirtual(X) 0
- # define IsHiddenColumn(X) 0
- #endif
- /*
- ** Each foreign key constraint is an instance of the following structure.
- **
- ** A foreign key is associated with two tables. The "from" table is
- ** the table that contains the REFERENCES clause that creates the foreign
- ** key. The "to" table is the table that is named in the REFERENCES clause.
- ** Consider this example:
- **
- ** CREATE TABLE ex1(
- ** a INTEGER PRIMARY KEY,
- ** b INTEGER CONSTRAINT fk1 REFERENCES ex2(x)
- ** );
- **
- ** For foreign key "fk1", the from-table is "ex1" and the to-table is "ex2".
- **
- ** Each REFERENCES clause generates an instance of the following structure
- ** which is attached to the from-table. The to-table need not exist when
- ** the from-table is created. The existance of the to-table is not checked
- ** until an attempt is made to insert data into the from-table.
- **
- ** The sqlite.aFKey hash table stores pointers to this structure
- ** given the name of a to-table. For each to-table, all foreign keys
- ** associated with that table are on a linked list using the FKey.pNextTo
- ** field.
- */
- struct FKey {
- Table *pFrom; /* The table that constains the REFERENCES clause */
- FKey *pNextFrom; /* Next foreign key in pFrom */
- char *zTo; /* Name of table that the key points to */
- FKey *pNextTo; /* Next foreign key that points to zTo */
- int nCol; /* Number of columns in this key */
- struct sColMap { /* Mapping of columns in pFrom to columns in zTo */
- int iFrom; /* Index of column in pFrom */
- char *zCol; /* Name of column in zTo. If 0 use PRIMARY KEY */
- } *aCol; /* One entry for each of nCol column s */
- u8 isDeferred; /* True if constraint checking is deferred till COMMIT */
- u8 updateConf; /* How to resolve conflicts that occur on UPDATE */
- u8 deleteConf; /* How to resolve conflicts that occur on DELETE */
- u8 insertConf; /* How to resolve conflicts that occur on INSERT */
- };
- /*
- ** SQLite supports many different ways to resolve a constraint
- ** error. ROLLBACK processing means that a constraint violation
- ** causes the operation in process to fail and for the current transaction
- ** to be rolled back. ABORT processing means the operation in process
- ** fails and any prior changes from that one operation are backed out,
- ** but the transaction is not rolled back. FAIL processing means that
- ** the operation in progress stops and returns an error code. But prior
- ** changes due to the same operation are not backed out and no rollback
- ** occurs. IGNORE means that the particular row that caused the constraint
- ** error is not inserted or updated. Processing continues and no error
- ** is returned. REPLACE means that preexisting database rows that caused
- ** a UNIQUE constraint violation are removed so that the new insert or
- ** update can proceed. Processing continues and no error is reported.
- **
- ** RESTRICT, SETNULL, and CASCADE actions apply only to foreign keys.
- ** RESTRICT is the same as ABORT for IMMEDIATE foreign keys and the
- ** same as ROLLBACK for DEFERRED keys. SETNULL means that the foreign
- ** key is set to NULL. CASCADE means that a DELETE or UPDATE of the
- ** referenced table row is propagated into the row that holds the
- ** foreign key.
- **
- ** The following symbolic values are used to record which type
- ** of action to take.
- */
- #define OE_None 0 /* There is no constraint to check */
- #define OE_Rollback 1 /* Fail the operation and rollback the transaction */
- #define OE_Abort 2 /* Back out changes but do no rollback transaction */
- #define OE_Fail 3 /* Stop the operation but leave all prior changes */
- #define OE_Ignore 4 /* Ignore the error. Do not do the INSERT or UPDATE */
- #define OE_Replace 5 /* Delete existing record, then do INSERT or UPDATE */
- #define OE_Restrict 6 /* OE_Abort for IMMEDIATE, OE_Rollback for DEFERRED */
- #define OE_SetNull 7 /* Set the foreign key value to NULL */
- #define OE_SetDflt 8 /* Set the foreign key value to its default */
- #define OE_Cascade 9 /* Cascade the changes */
- #define OE_Default 99 /* Do whatever the default action is */
- /*
- ** An instance of the following structure is passed as the first
- ** argument to sqlite3VdbeKeyCompare and is used to control the
- ** comparison of the two index keys.
- **
- ** If the KeyInfo.incrKey value is true and the comparison would
- ** otherwise be equal, then return a result as if the second key
- ** were larger.
- */
- struct KeyInfo {
- sqlite3 *db; /* The database connection */
- u8 enc; /* Text encoding - one of the TEXT_Utf* values */
- u8 incrKey; /* Increase 2nd key by epsilon before comparison */
- u8 prefixIsEqual; /* Treat a prefix as equal */
- int nField; /* Number of entries in aColl[] */
- u8 *aSortOrder; /* If defined an aSortOrder[i] is true, sort DESC */
- CollSeq *aColl[1]; /* Collating sequence for each term of the key */
- };
- /*
- ** Each SQL index is represented in memory by an
- ** instance of the following structure.
- **
- ** The columns of the table that are to be indexed are described
- ** by the aiColumn[] field of this structure. For example, suppose
- ** we have the following table and index:
- **
- ** CREATE TABLE Ex1(c1 int, c2 int, c3 text);
- ** CREATE INDEX Ex2 ON Ex1(c3,c1);
- **
- ** In the Table structure describing Ex1, nCol==3 because there are
- ** three columns in the table. In the Index structure describing
- ** Ex2, nColumn==2 since 2 of the 3 columns of Ex1 are indexed.
- ** The value of aiColumn is {2, 0}. aiColumn[0]==2 because the
- ** first column to be indexed (c3) has an index of 2 in Ex1.aCol[].
- ** The second column to be indexed (c1) has an index of 0 in
- ** Ex1.aCol[], hence Ex2.aiColumn[1]==0.
- **
- ** The Index.onError field determines whether or not the indexed columns
- ** must be unique and what to do if they are not. When Index.onError=OE_None,
- ** it means this is not a unique index. Otherwise it is a unique index
- ** and the value of Index.onError indicate the which conflict resolution
- ** algorithm to employ whenever an attempt is made to insert a non-unique
- ** element.
- */
- struct Index {
- char *zName; /* Name of this index */
- int nColumn; /* Number of columns in the table used by this index */
- int *aiColumn; /* Which columns are used by this index. 1st is 0 */
- unsigned *aiRowEst; /* Result of ANALYZE: Est. rows selected by each column */
- Table *pTable; /* The SQL table being indexed */
- int tnum; /* Page containing root of this index in database file */
- u8 onError; /* OE_Abort, OE_Ignore, OE_Replace, or OE_None */
- u8 autoIndex; /* True if is automatically created (ex: by UNIQUE) */
- char *zColAff; /* String defining the affinity of each column */
- Index *pNext; /* The next index associated with the same table */
- Schema *pSchema; /* Schema containing this index */
- u8 *aSortOrder; /* Array of size Index.nColumn. True==DESC, False==ASC */
- char **azColl; /* Array of collation sequence names for index */
- };
- /*
- ** Each token coming out of the lexer is an instance of
- ** this structure. Tokens are also used as part of an expression.
- **
- ** Note if Token.z==0 then Token.dyn and Token.n are undefined and
- ** may contain random values. Do not make any assuptions about Token.dyn
- ** and Token.n when Token.z==0.
- */
- struct Token {
- const unsigned char *z; /* Text of the token. Not NULL-terminated! */
- unsigned dyn : 1; /* True for malloced memory, false for static */
- unsigned n : 31; /* Number of characters in this token */
- };
- /*
- ** An instance of this structure contains information needed to generate
- ** code for a SELECT that contains aggregate functions.
- **
- ** If Expr.op==TK_AGG_COLUMN or TK_AGG_FUNCTION then Expr.pAggInfo is a
- ** pointer to this structure. The Expr.iColumn field is the index in
- ** AggInfo.aCol[] or AggInfo.aFunc[] of information needed to generate
- ** code for that node.
- **
- ** AggInfo.pGroupBy and AggInfo.aFunc.pExpr point to fields within the
- ** original Select structure that describes the SELECT statement. These
- ** fields do not need to be freed when deallocating the AggInfo structure.
- */
- struct AggInfo {
- u8 directMode; /* Direct rendering mode means take data directly
- ** from source tables rather than from accumulators */
- u8 useSortingIdx; /* In direct mode, reference the sorting index rather
- ** than the source table */
- int sortingIdx; /* Cursor number of the sorting index */
- ExprList *pGroupBy; /* The group by clause */
- int nSortingColumn; /* Number of columns in the sorting index */
- struct AggInfo_col { /* For each column used in source tables */
- Table *pTab; /* Source table */
- int iTable; /* Cursor number of the source table */
- int iColumn; /* Column number within the source table */
- int iSorterColumn; /* Column number in the sorting index */
- int iMem; /* Memory location that acts as accumulator */
- Expr *pExpr; /* The original expression */
- } *aCol;
- int nColumn; /* Number of used entries in aCol[] */
- int nColumnAlloc; /* Number of slots allocated for aCol[] */
- int nAccumulator; /* Number of columns that show through to the output.
- ** Additional columns are used only as parameters to
- ** aggregate functions */
- struct AggInfo_func { /* For each aggregate function */
- Expr *pExpr; /* Expression encoding the function */
- FuncDef *pFunc; /* The aggregate function implementation */
- int iMem; /* Memory location that acts as accumulator */
- int iDistinct; /* Ephermeral table used to enforce DISTINCT */
- } *aFunc;
- int nFunc; /* Number of entries in aFunc[] */
- int nFuncAlloc; /* Number of slots allocated for aFunc[] */
- };
- /*
- ** Each node of an expression in the parse tree is an instance
- ** of this structure.
- **
- ** Expr.op is the opcode. The integer parser token codes are reused
- ** as opcodes here. For example, the parser defines TK_GE to be an integer
- ** code representing the ">=" operator. This same integer code is reused
- ** to represent the greater-than-or-equal-to operator in the expression
- ** tree.
- **
- ** Expr.pRight and Expr.pLeft are subexpressions. Expr.pList is a list
- ** of argument if the expression is a function.
- **
- ** Expr.token is the operator token for this node. For some expressions
- ** that have subexpressions, Expr.token can be the complete text that gave
- ** rise to the Expr. In the latter case, the token is marked as being
- ** a compound token.
- **
- ** An expression of the form ID or ID.ID refers to a column in a table.
- ** For such expressions, Expr.op is set to TK_COLUMN and Expr.iTable is
- ** the integer cursor number of a VDBE cursor pointing to that table and
- ** Expr.iColumn is the column number for the specific column. If the
- ** expression is used as a result in an aggregate SELECT, then the
- ** value is also stored in the Expr.iAgg column in the aggregate so that
- ** it can be accessed after all aggregates are computed.
- **
- ** If the expression is a function, the Expr.iTable is an integer code
- ** representing which function. If the expression is an unbound variable
- ** marker (a question mark character '?' in the original SQL) then the
- ** Expr.iTable holds the index number for that variable.
- **
- ** If the expression is a subquery then Expr.iColumn holds an integer
- ** register number containing the result of the subquery. If the
- ** subquery gives a constant result, then iTable is -1. If the subquery
- ** gives a different answer at different times during statement processing
- ** then iTable is the address of a subroutine that computes the subquery.
- **
- ** The Expr.pSelect field points to a SELECT statement. The SELECT might
- ** be the right operand of an IN operator. Or, if a scalar SELECT appears
- ** in an expression the opcode is TK_SELECT and Expr.pSelect is the only
- ** operand.
- **
- ** If the Expr is of type OP_Column, and the table it is selecting from
- ** is a disk table or the "old.*" pseudo-table, then pTab points to the
- ** corresponding table definition.
- */
- struct Expr {
- u8 op; /* Operation performed by this node */
- char affinity; /* The affinity of the column or 0 if not a column */
- u16 flags; /* Various flags. See below */
- CollSeq *pColl; /* The collation type of the column or 0 */
- Expr *pLeft, *pRight; /* Left and right subnodes */
- ExprList *pList; /* A list of expressions used as function arguments
- ** or in "<expr> IN (<expr-list)" */
- Token token; /* An operand token */
- Token span; /* Complete text of the expression */
- int iTable, iColumn; /* When op==TK_COLUMN, then this expr node means the
- ** iColumn-th field of the iTable-th table. */
- AggInfo *pAggInfo; /* Used by TK_AGG_COLUMN and TK_AGG_FUNCTION */
- int iAgg; /* Which entry in pAggInfo->aCol[] or ->aFunc[] */
- int iRightJoinTable; /* If EP_FromJoin, the right table of the join */
- Select *pSelect; /* When the expression is a sub-select. Also the
- ** right side of "<expr> IN (<select>)" */
- Table *pTab; /* Table for OP_Column expressions. */
- /* Schema *pSchema; */
- #if defined(SQLITE_TEST) || SQLITE_MAX_EXPR_DEPTH>0
- int nHeight; /* Height of the tree headed by this node */
- #endif
- };
- /*
- ** The following are the meanings of bits in the Expr.flags field.
- */
- #define EP_FromJoin 0x0001 /* Originated in ON or USING clause of a join */
- #define EP_Agg 0x0002 /* Contains one or more aggregate functions */
- #define EP_Resolved 0x0004 /* IDs have been resolved to COLUMNs */
- #define EP_Error 0x0008 /* Expression contains one or more errors */
- #define EP_Distinct 0x0010 /* Aggregate function with DISTINCT keyword */
- #define EP_VarSelect 0x0020 /* pSelect is correlated, not constant */
- #define EP_Dequoted 0x0040 /* True if the string has been dequoted */
- #define EP_InfixFunc 0x0080 /* True for an infix function: LIKE, GLOB, etc */
- #define EP_ExpCollate 0x0100 /* Collating sequence specified explicitly */
- #define EP_AnyAff 0x0200 /* Can take a cached column of any affinity */
- #define EP_FixedDest 0x0400 /* Result needed in a specific register */
- /*
- ** These macros can be used to test, set, or clear bits in the
- ** Expr.flags field.
- */
- #define ExprHasProperty(E,P) (((E)->flags&(P))==(P))
- #define ExprHasAnyProperty(E,P) (((E)->flags&(P))!=0)
- #define ExprSetProperty(E,P) (E)->flags|=(P)
- #define ExprClearProperty(E,P) (E)->flags&=~(P)
- /*
- ** A list of expressions. Each expression may optionally have a
- ** name. An expr/name combination can be used in several ways, such
- ** as the list of "expr AS ID" fields following a "SELECT" or in the
- ** list of "ID = expr" items in an UPDATE. A list of expressions can
- ** also be used as the argument to a function, in which case the a.zName
- ** field is not used.
- */
- struct ExprList {
- int nExpr; /* Number of expressions on the list */
- int nAlloc; /* Number of entries allocated below */
- int iECursor; /* VDBE Cursor associated with this ExprList */
- struct ExprList_item {
- Expr *pExpr; /* The list of expressions */
- char *zName; /* Token associated with this expression */
- u8 sortOrder; /* 1 for DESC or 0 for ASC */
- u8 isAgg; /* True if this is an aggregate like count(*) */
- u8 done; /* A flag to indicate when processing is finished */
- } *a; /* One entry for each expression */
- };
- /*
- ** An instance of this structure can hold a simple list of identifiers,
- ** such as the list "a,b,c" in the following statements:
- **
- ** INSERT INTO t(a,b,c) VALUES ...;
- ** CREATE INDEX idx ON t(a,b,c);
- ** CREATE TRIGGER trig BEFORE UPDATE ON t(a,b,c) ...;
- **
- ** The IdList.a.idx field is used when the IdList represents the list of
- ** column names after a table name in an INSERT statement. In the statement
- **
- ** INSERT INTO t(a,b,c) ...
- **
- ** If "a" is the k-th column of table "t", then IdList.a[0].idx==k.
- */
- struct IdList {
- struct IdList_item {
- char *zName; /* Name of the identifier */
- int idx; /* Index in some Table.aCol[] of a column named zName */
- } *a;
- int nId; /* Number of identifiers on the list */
- int nAlloc; /* Number of entries allocated for a[] below */
- };
- /*
- ** The bitmask datatype defined below is used for various optimizations.
- **
- ** Changing this from a 64-bit to a 32-bit type limits the number of
- ** tables in a join to 32 instead of 64. But it also reduces the size
- ** of the library by 738 bytes on ix86.
- */
- typedef u64 Bitmask;
- /*
- ** The following structure describes the FROM clause of a SELECT statement.
- ** Each table or subquery in the FROM clause is a separate element of
- ** the SrcList.a[] array.
- **
- ** With the addition of multiple database support, the following structure
- ** can also be used to describe a particular table such as the table that
- ** is modified by an INSERT, DELETE, or UPDATE statement. In standard SQL,
- ** such a table must be a simple name: ID. But in SQLite, the table can
- ** now be identified by a database name, a dot, then the table name: ID.ID.
- **
- ** The jointype starts out showing the join type between the current table
- ** and the next table on the list. The parser builds the list this way.
- ** But sqlite3SrcListShiftJoinType() later shifts the jointypes so that each
- ** jointype expresses the join between the table and the previous table.
- */
- struct SrcList {
- i16 nSrc; /* Number of tables or subqueries in the FROM clause */
- i16 nAlloc; /* Number of entries allocated in a[] below */
- struct SrcList_item {
- char *zDatabase; /* Name of database holding this table */
- char *zName; /* Name of the table */
- char *zAlias; /* The "B" part of a "A AS B" phrase. zName is the "A" */
- Table *pTab; /* An SQL table corresponding to zName */
- Select *pSelect; /* A SELECT statement used in place of a table name */
- u8 isPopulated; /* Temporary table associated with SELECT is populated */
- u8 jointype; /* Type of join between this able and the previous */
- int iCursor; /* The VDBE cursor number used to access this table */
- Expr *pOn; /* The ON clause of a join */
- IdList *pUsing; /* The USING clause of a join */
- Bitmask colUsed; /* Bit N (1<<N) set if column N or pTab is used */
- } a[1]; /* One entry for each identifier on the list */
- };
- /*
- ** Permitted values of the SrcList.a.jointype field
- */
- #define JT_INNER 0x0001 /* Any kind of inner or cross join */
- #define JT_CROSS 0x0002 /* Explicit use of the CROSS keyword */
- #define JT_NATURAL 0x0004 /* True for a "natural" join */
- #define JT_LEFT 0x0008 /* Left outer join */
- #define JT_RIGHT 0x0010 /* Right outer join */
- #define JT_OUTER 0x0020 /* The "OUTER" keyword is present */
- #define JT_ERROR 0x0040 /* unknown or unsupported join type */
- /*
- ** For each nested loop in a WHERE clause implementation, the WhereInfo
- ** structure contains a single instance of this structure. This structure
- ** is intended to be private the the where.c module and should not be
- ** access or modified by other modules.
- **
- ** The pIdxInfo and pBestIdx fields are used to help pick the best
- ** index on a virtual table. The pIdxInfo pointer contains indexing
- ** information for the i-th table in the FROM clause before reordering.
- ** All the pIdxInfo pointers are freed by whereInfoFree() in where.c.
- ** The pBestIdx pointer is a copy of pIdxInfo for the i-th table after
- ** FROM clause ordering. This is a little confusing so I will repeat
- ** it in different words. WhereInfo.a[i].pIdxInfo is index information
- ** for WhereInfo.pTabList.a[i]. WhereInfo.a[i].pBestInfo is the
- ** index information for the i-th loop of the join. pBestInfo is always
- ** either NULL or a copy of some pIdxInfo. So for cleanup it is
- ** sufficient to free all of the pIdxInfo pointers.
- **
- */
- struct WhereLevel {
- int iFrom; /* Which entry in the FROM clause */
- int flags; /* Flags associated with this level */
- int iMem; /* First memory cell used by this level */
- int iLeftJoin; /* Memory cell used to implement LEFT OUTER JOIN */
- Index *pIdx; /* Index used. NULL if no index */
- int iTabCur; /* The VDBE cursor used to access the table */
- int iIdxCur; /* The VDBE cursor used to acesss pIdx */
- int brk; /* Jump here to break out of the loop */
- int nxt; /* Jump here to start the next IN combination */
- int cont; /* Jump here to continue with the next loop cycle */
- int top; /* First instruction of interior of the loop */
- int op, p1, p2; /* Opcode used to terminate the loop */
- int nEq; /* Number of == or IN constraints on this loop */
- int nIn; /* Number of IN operators constraining this loop */
- struct InLoop {
- int iCur; /* The VDBE cursor used by this IN operator */
- int topAddr; /* Top of the IN loop */
- } *aInLoop; /* Information about each nested IN operator */
- sqlite3_index_info *pBestIdx; /* Index information for this level */
- /* The following field is really not part of the current level. But
- ** we need a place to cache index information for each table in the
- ** FROM clause and the WhereLevel structure is a convenient place.
- */
- sqlite3_index_info *pIdxInfo; /* Index info for n-th source table */
- };
- /*
- ** Flags appropriate for the wflags parameter of sqlite3WhereBegin().
- */
- #define WHERE_ORDERBY_NORMAL 0 /* No-op */
- #define WHERE_ORDERBY_MIN 1 /* ORDER BY processing for min() func */
- #define WHERE_ORDERBY_MAX 2 /* ORDER BY processing for max() func */
- #define WHERE_ONEPASS_DESIRED 4 /* Want to do one-pass UPDATE/DELETE */
- /*
- ** The WHERE clause processing routine has two halves. The
- ** first part does the start of the WHERE loop and the second
- ** half does the tail of the WHERE loop. An instance of
- ** this structure is returned by the first half and passed
- ** into the second half to give some continuity.
- */
- struct WhereInfo {
- Parse *pParse; /* Parsing and code generating context */
- u8 okOnePass; /* Ok to use one-pass algorithm for UPDATE or DELETE */
- SrcList *pTabList; /* List of tables in the join */
- int iTop; /* The very beginning of the WHERE loop */
- int iContinue; /* Jump here to continue with next record */
- int iBreak; /* Jump here to break out of the loop */
- int nLevel; /* Number of nested loop */
- sqlite3_index_info **apInfo; /* Array of pointers to index info structures */
- WhereLevel a[1]; /* Information about each nest loop in the WHERE */
- };
- /*
- ** A NameContext defines a context in which to resolve table and column
- ** names. The context consists of a list of tables (the pSrcList) field and
- ** a list of named expression (pEList). The named expression list may
- ** be NULL. The pSrc corresponds to the FROM clause of a SELECT or
- ** to the table being operated on by INSERT, UPDATE, or DELETE. The
- ** pEList corresponds to the result set of a SELECT and is NULL for
- ** other statements.
- **
- ** NameContexts can be nested. When resolving names, the inner-most
- ** context is searched first. If no match is found, the next outer
- ** context is checked. If there is still no match, the next context
- ** is checked. This process continues until either a match is found
- ** or all contexts are check. When a match is found, the nRef member of
- ** the context containing the match is incremented.
- **
- ** Each subquery gets a new NameContext. The pNext field points to the
- ** NameContext in the parent query. Thus the process of scanning the
- ** NameContext list corresponds to searching through successively outer
- ** subqueries looking for a match.
- */
- struct NameContext {
- Parse *pParse; /* The parser */
- SrcList *pSrcList; /* One or more tables used to resolve names */
- ExprList *pEList; /* Optional list of named expressions */
- int nRef; /* Number of names resolved by this context */
- int nErr; /* Number of errors encountered while resolving names */
- u8 allowAgg; /* Aggregate functions allowed here */
- u8 hasAgg; /* True if aggregates are seen */
- u8 isCheck; /* True if resolving names in a CHECK constraint */
- int nDepth; /* Depth of subquery recursion. 1 for no recursion */
- AggInfo *pAggInfo; /* Information about aggregates at this level */
- NameContext *pNext; /* Next outer name context. NULL for outermost */
- };
- /*
- ** An instance of the following structure contains all information
- ** needed to generate code for a single SELECT statement.
- **
- ** nLimit is set to -1 if there is no LIMIT clause. nOffset is set to 0.
- ** If there is a LIMIT clause, the parser sets nLimit to the value of the
- ** limit and nOffset to the value of the offset (or 0 if there is not
- ** offset). But later on, nLimit and nOffset become the memory locations
- ** in the VDBE that record the limit and offset counters.
- **
- ** addrOpenEphm[] entries contain the address of OP_OpenEphemeral opcodes.
- ** These addresses must be stored so that we can go back and fill in
- ** the P4_KEYINFO and P2 parameters later. Neither the KeyInfo nor
- ** the number of columns in P2 can be computed at the same time
- ** as the OP_OpenEphm instruction is coded because not
- ** enough information about the compound query is known at that point.
- ** The KeyInfo for addrOpenTran[0] and [1] contains collating sequences
- ** for the result set. The KeyInfo for addrOpenTran[2] contains collating
- ** sequences for the ORDER BY clause.
- */
- struct Select {
- ExprList *pEList; /* The fields of the result */
- u8 op; /* One of: TK_UNION TK_ALL TK_INTERSECT TK_EXCEPT */
- u8 isDistinct; /* True if the DISTINCT keyword is present */
- u8 isResolved; /* True once sqlite3SelectResolve() has run. */
- u8 isAgg; /* True if this is an aggregate query */
- u8 usesEphm; /* True if uses an OpenEphemeral opcode */
- u8 disallowOrderBy; /* Do not allow an ORDER BY to be attached if TRUE */
- char affinity; /* MakeRecord with this affinity for SRT_Set */
- SrcList *pSrc; /* The FROM clause */
- Expr *pWhere; /* The WHERE clause */
- ExprList *pGroupBy; /* The GROUP BY clause */
- Expr *pHaving; /* The HAVING clause */
- ExprList *pOrderBy; /* The ORDER BY clause */
- Select *pPrior; /* Prior select in a compound select statement */
- Select *pNext; /* Next select to the left in a compound */
- Select *pRightmost; /* Right-most select in a compound select statement */
- Expr *pLimit; /* LIMIT expression. NULL means not used. */
- Expr *pOffset; /* OFFSET expression. NULL means not used. */
- int iLimit, iOffset; /* Memory registers holding LIMIT & OFFSET counters */
- int addrOpenEphm[3]; /* OP_OpenEphem opcodes related to this select */
- };
- /*
- ** The results of a select can be distributed in several ways.
- */
- #define SRT_Union 1 /* Store result as keys in an index */
- #define SRT_Except 2 /* Remove result from a UNION index */
- #define SRT_Exists 3 /* Store 1 if the result is not empty */
- #define SRT_Discard 4 /* Do not save the results anywhere */
- /* The ORDER BY clause is ignored for all of the above */
- #define IgnorableOrderby(X) ((X->eDest)<=SRT_Discard)
- #define SRT_Callback 5 /* Invoke a callback with each row of result */
- #define SRT_Mem 6 /* Store result in a memory cell */
- #define SRT_Set 7 /* Store non-null results as keys in an index */
- #define SRT_Table 8 /* Store result as data with an automatic rowid */
- #define SRT_EphemTab 9 /* Create transient tab and store like SRT_Table */
- #define SRT_Subroutine 10 /* Call a subroutine to handle results */
- /*
- ** A structure used to customize the behaviour of sqlite3Select(). See
- ** comments above sqlite3Select() for details.
- */
- typedef struct SelectDest SelectDest;
- struct SelectDest {
- u8 eDest; /* How to dispose of the results */
- u8 affinity; /* Affinity used when eDest==SRT_Set */
- int iParm; /* A parameter used by the eDest disposal method */
- int iMem; /* Base register where results are written */
- int nMem; /* Number of registers allocated */
- };
- /*
- ** An SQL parser context. A copy of this structure is passed through
- ** the parser and down into all the parser action routine in order to
- ** carry around information that is global to the entire parse.
- **
- ** The structure is divided into two parts. When the parser and code
- ** generate call themselves recursively, the first part of the structure
- ** is constant but the second part is reset at the beginning and end of
- ** each recursion.
- **
- ** The nTableLock and aTableLock variables are only used if the shared-cache
- ** feature is enabled (if sqlite3Tsd()->useSharedData is true). They are
- ** used to store the set of table-locks required by the statement being
- ** compiled. Function sqlite3TableLock() is used to add entries to the
- ** list.
- */
- struct Parse {
- sqlite3 *db; /* The main database structure */
- int rc; /* Return code from execution */
- char *zErrMsg; /* An error message */
- Vdbe *pVdbe; /* An engine for executing database bytecode */
- u8 colNamesSet; /* TRUE after OP_ColumnName has been issued to pVdbe */
- u8 nameClash; /* A permanent table name clashes with temp table name */
- u8 checkSchema; /* Causes schema cookie check after an error */
- u8 nested; /* Number of nested calls to the parser/code generator */
- u8 parseError; /* True after a parsing error. Ticket #1794 */
- u8 nTempReg; /* Number of temporary registers in aTempReg[] */
- u8 nTempInUse; /* Number of aTempReg[] currently checked out */
- int aTempReg[8]; /* Holding area for temporary registers */
- int nRangeReg; /* Size of the temporary register block */
- int iRangeReg; /* First register in temporary register block */
- int nErr; /* Number of errors seen */
- int nTab; /* Number of previously allocated VDBE cursors */
- int nMem; /* Number of memory cells used so far */
- int nSet; /* Number of sets used so far */
- int ckBase; /* Base register of data during check constraints */
- int disableColCache; /* True to disable adding to column cache */
- int nColCache; /* Number of entries in the column cache */
- int iColCache; /* Next entry of the cache to replace */
- struct yColCache {
- int iTable; /* Table cursor number */
- int iColumn; /* Table column number */
- char affChange; /* True if this register has had an affinity change */
- int iReg; /* Register holding value of this column */
- } aColCache[10]; /* One for each valid column cache entry */
- u32 writeMask; /* Start a write transaction on these databases */
- u32 cookieMask; /* Bitmask of schema verified databases */
- int cookieGoto; /* Address of OP_Goto to cookie verifier subroutine */
- int cookieValue[SQLITE_MAX_ATTACHED+2]; /* Values of cookies to verify */
- #ifndef SQLITE_OMIT_SHARED_CACHE
- int nTableLock; /* Number of locks in aTableLock */
- TableLock *aTableLock; /* Required table locks for shared-cache mode */
- #endif
- int regRowid; /* Register holding rowid of CREATE TABLE entry */
- int regRoot; /* Register holding root page number for new objects */
- /* Above is constant between recursions. Below is reset before and after
- ** each recursion */
- int nVar; /* Number of '?' variables seen in the SQL so far */
- int nVarExpr; /* Number of used slots in apVarExpr[] */
- int nVarExprAlloc; /* Number of allocated slots in apVarExpr[] */
- Expr **apVarExpr; /* Pointers to :aaa and $aaaa wildcard expressions */
- u8 explain; /* True if the EXPLAIN flag is found on the query */
- Token sErrToken; /* The token at which the error occurred */
- Token sNameToken; /* Token with unqualified schema object name */
- Token sLastToken; /* The last token parsed */
- const char *zSql; /* All SQL text */
- const char *zTail; /* All SQL text past the last semicolon parsed */
- Table *pNewTable; /* A table being constructed by CREATE TABLE */
- Trigger *pNewTrigger; /* Trigger under construct by a CREATE TRIGGER */
- TriggerStack *trigStack; /* Trigger actions being coded */
- const char *zAuthContext; /* The 6th parameter to db->xAuth callbacks */
- #ifndef SQLITE_OMIT_VIRTUALTABLE
- Token sArg; /* Complete text of a module argument */
- u8 declareVtab; /* True if inside sqlite3_declare_vtab() */
- Table *pVirtualLock; /* Require virtual table lock on this table */
- #endif
- #if defined(SQLITE_TEST) || SQLITE_MAX_EXPR_DEPTH>0
- int nHeight; /* Expression tree height of current sub-select */
- #endif
- };
- #ifdef SQLITE_OMIT_VIRTUALTABLE
- #define IN_DECLARE_VTAB 0
- #else
- #define IN_DECLARE_VTAB (pParse->declareVtab)
- #endif
- /*
- ** An instance of the following structure can be declared on a stack and used
- ** to save the Parse.zAuthContext value so that it can be restored later.
- */
- struct AuthContext {
- const char *zAuthContext; /* Put saved Parse.zAuthContext here */
- Parse *pParse; /* The Parse structure */
- };
- /*
- ** Bitfield flags for P2 value in OP_Insert and OP_Delete
- */
- #define OPFLAG_NCHANGE 1 /* Set to update db->nChange */
- #define OPFLAG_LASTROWID 2 /* Set to update db->lastRowid */
- #define OPFLAG_ISUPDATE 4 /* This OP_Insert is an sql UPDATE */
- #define OPFLAG_APPEND 8 /* This is likely to be an append */
- /*
- * Each trigger present in the database schema is stored as an instance of
- * struct Trigger.
- *
- * Pointers to instances of struct Trigger are stored in two ways.
- * 1. In the "trigHash" hash table (part of the sqlite3* that represents the
- * database). This allows Trigger structures to be retrieved by name.
- * 2. All triggers associated with a single table form a linked list, using the
- * pNext member of struct Trigger. A pointer to the first element of the
- * linked list is stored as the "pTrigger" member of the associated
- * struct Table.
- *
- * The "step_list" member points to the first element of a linked list
- * containing the SQL statements specified as the trigger program.
- */
- struct Trigger {
- char *name; /* The name of the trigger */
- char *table; /* The table or view to which the trigger applies */
- u8 op; /* One of TK_DELETE, TK_UPDATE, TK_INSERT */
- u8 tr_tm; /* One of TRIGGER_BEFORE, TRIGGER_AFTER */
- Expr *pWhen; /* The WHEN clause of the expresion (may be NULL) */
- IdList *pColumns; /* If this is an UPDATE OF <column-list> trigger,
- the <column-list> is stored here */
- Token nameToken; /* Token containing zName. Use during parsing only */
- Schema *pSchema; /* Schema containing the trigger */
- Schema *pTabSchema; /* Schema containing the table */
- TriggerStep *step_list; /* Link list of trigger program steps */
- Trigger *pNext; /* Next trigger associated with the table */
- };
- /*
- ** A trigger is either a BEFORE or an AFTER trigger. The following constants
- ** determine which.
- **
- ** If there are multiple triggers, you might of some BEFORE and some AFTER.
- ** In that cases, the constants below can be ORed together.
- */
- #define TRIGGER_BEFORE 1
- #define TRIGGER_AFTER 2
- /*
- * An instance of struct TriggerStep is used to store a single SQL statement
- * that is a part of a trigger-program.
- *
- * Instances of struct TriggerStep are stored in a singly linked list (linked
- * using the "pNext" member) referenced by the "step_list" member of the
- * associated struct Trigger instance. The first element of the linked list is
- * the first step of the trigger-program.
- *
- * The "op" member indicates whether this is a "DELETE", "INSERT", "UPDATE" or
- * "SELECT" statement. The meanings of the other members is determined by the
- * value of "op" as follows:
- *
- * (op == TK_INSERT)
- * orconf -> stores the ON CONFLICT algorithm
- * pSelect -> If this is an INSERT INTO ... SELECT ... statement, then
- * this stores a pointer to the SELECT statement. Otherwise NULL.
- * target -> A token holding the name of the table to insert into.
- * pExprList -> If this is an INSERT INTO ... VALUES ... statement, then
- * this stores values to be inserted. Otherwise NULL.
- * pIdList -> If this is an INSERT INTO ... (<column-names>) VALUES ...
- * statement, then this stores the column-names to be
- * inserted into.
- *
- * (op == TK_DELETE)
- * target -> A token holding the name of the table to delete from.
- * pWhere -> The WHERE clause of the DELETE statement if one is specified.
- * Otherwise NULL.
- *
- * (op == TK_UPDATE)
- * target -> A token holding the name of the table to update rows of.
- * pWhere -> The WHERE clause of the UPDATE statement if one is specified.
- * Otherwise NULL.
- * pExprList -> A list of the columns to update and the expressions to update
- * them to. See sqlite3Update() documentation of "pChanges"
- * argument.
- *
- */
- struct TriggerStep {
- int op; /* One of TK_DELETE, TK_UPDATE, TK_INSERT, TK_SELECT */
- int orconf; /* OE_Rollback etc. */
- Trigger *pTrig; /* The trigger that this step is a part of */
- Select *pSelect; /* Valid for SELECT and sometimes
- INSERT steps (when pExprList == 0) */
- Token target; /* Valid for DELETE, UPDATE, INSERT steps */
- Expr *pWhere; /* Valid for DELETE, UPDATE steps */
- ExprList *pExprList; /* Valid for UPDATE statements and sometimes
- INSERT steps (when pSelect == 0) */
- IdList *pIdList; /* Valid for INSERT statements only */
- TriggerStep *pNext; /* Next in the link-list */
- TriggerStep *pLast; /* Last element in link-list. Valid for 1st elem only */
- };
- /*
- * An instance of struct TriggerStack stores information required during code
- * generation of a single trigger program. While the trigger program is being
- * coded, its associated TriggerStack instance is pointed to by the
- * "pTriggerStack" member of the Parse structure.
- *
- * The pTab member points to the table that triggers are being coded on. The
- * newIdx member contains the index of the vdbe cursor that points at the temp
- * table that stores the new.* references. If new.* references are not valid
- * for the trigger being coded (for example an ON DELETE trigger), then newIdx
- * is set to -1. The oldIdx member is analogous to newIdx, for old.* references.
- *
- * The ON CONFLICT policy to be used for the trigger program steps is stored
- * as the orconf member. If this is OE_Default, then the ON CONFLICT clause
- * specified for individual triggers steps is used.
- *
- * struct TriggerStack has a "pNext" member, to allow linked lists to be
- * constructed. When coding nested triggers (triggers fired by other triggers)
- * each nested trigger stores its parent trigger's TriggerStack as the "pNext"
- * pointer. Once the nested trigger has been coded, the pNext value is restored
- * to the pTriggerStack member of the Parse stucture and coding of the parent
- * trigger continues.
- *
- * Before a nested trigger is coded, the linked list pointed to by the
- * pTriggerStack is scanned to ensure that the trigger is not about to be coded
- * recursively. If this condition is detected, the nested trigger is not coded.
- */
- struct TriggerStack {
- Table *pTab; /* Table that triggers are currently being coded on */
- int newIdx; /* Index of vdbe cursor to "new" temp table */
- int oldIdx; /* Index of vdbe cursor to "old" temp table */
- u32 newColMask;
- u32 oldColMask;
- int orconf; /* Current orconf policy */
- int ignoreJump; /* where to jump to for a RAISE(IGNORE) */
- Trigger *pTrigger; /* The trigger currently being coded */
- TriggerStack *pNext; /* Next trigger down on the trigger stack */
- };
- /*
- ** The following structure contains information used by the sqliteFix...
- ** routines as they walk the parse tree to make database references
- ** explicit.
- */
- typedef struct DbFixer DbFixer;
- struct DbFixer {
- Parse *pParse; /* The parsing context. Error messages written here */
- const char *zDb; /* Make sure all objects are contained in this database */
- const char *zType; /* Type of the container - used for error messages */
- const Token *pName; /* Name of the container - used for error messages */
- };
- /*
- ** An objected used to accumulate the text of a string where we
- ** do not necessarily know how big the string will be in the end.
- */
- struct StrAccum {
- char *zBase; /* A base allocation. Not from malloc. */
- char *zText; /* The string collected so far */
- int nChar; /* Length of the string so far */
- int nAlloc; /* Amount of space allocated in zText */
- int mxAlloc; /* Maximum allowed string length */
- u8 mallocFailed; /* Becomes true if any memory allocation fails */
- u8 useMalloc; /* True if zText is enlargable using realloc */
- u8 tooBig; /* Becomes true if string size exceeds limits */
- };
- /*
- ** A pointer to this structure is used to communicate information
- ** from sqlite3Init and OP_ParseSchema into the sqlite3InitCallback.
- */
- typedef struct {
- sqlite3 *db; /* The database being initialized */
- int iDb; /* 0 for main database. 1 for TEMP, 2.. for ATTACHed */
- char **pzErrMsg; /* Error message stored here */
- int rc; /* Result code stored here */
- } InitData;
- /*
- ** Assuming zIn points to the first byte of a UTF-8 character,
- ** advance zIn to point to the first byte of the next UTF-8 character.
- */
- #define SQLITE_SKIP_UTF8(zIn) {
- if( (*(zIn++))>=0xc0 ){
- while( (*zIn & 0xc0)==0x80 ){ zIn++; }
- }
- }
- /*
- ** The SQLITE_CORRUPT_BKPT macro can be either a constant (for production
- ** builds) or a function call (for debugging). If it is a function call,
- ** it allows the operator to set a breakpoint at the spot where database
- ** corruption is first detected.
- */
- #ifdef SQLITE_DEBUG
- int sqlite3Corrupt(void);
- # define SQLITE_CORRUPT_BKPT sqlite3Corrupt()
- # define DEBUGONLY(X) X
- #else
- # define SQLITE_CORRUPT_BKPT SQLITE_CORRUPT
- # define DEBUGONLY(X)
- #endif
- /*
- ** Internal function prototypes
- */
- int sqlite3StrICmp(const char *, const char *);
- int sqlite3StrNICmp(const char *, const char *, int);
- int sqlite3IsNumber(const char*, int*, u8);
- void *sqlite3MallocZero(unsigned);
- void *sqlite3DbMallocZero(sqlite3*, unsigned);
- void *sqlite3DbMallocRaw(sqlite3*, unsigned);
- char *sqlite3StrDup(const char*);
- char *sqlite3StrNDup(const char*, int);
- char *sqlite3DbStrDup(sqlite3*,const char*);
- char *sqlite3DbStrNDup(sqlite3*,const char*, int);
- void *sqlite3DbReallocOrFree(sqlite3 *, void *, int);
- void *sqlite3DbRealloc(sqlite3 *, void *, int);
- int sqlite3MallocSize(void *);
- char *sqlite3MPrintf(sqlite3*,const char*, ...);
- char *sqlite3VMPrintf(sqlite3*,const char*, va_list);
- #if defined(SQLITE_TEST) || defined(SQLITE_DEBUG)
- void sqlite3DebugPrintf(const char*, ...);
- #endif
- #if defined(SQLITE_TEST)
- void *sqlite3TextToPtr(const char*);
- #endif
- void sqlite3SetString(char **, ...);
- void sqlite3ErrorMsg(Parse*, const char*, ...);
- void sqlite3ErrorClear(Parse*);
- void sqlite3Dequote(char*);
- void sqlite3DequoteExpr(sqlite3*, Expr*);
- int sqlite3KeywordCode(const unsigned char*, int);
- int sqlite3RunParser(Parse*, const char*, char **);
- void sqlite3FinishCoding(Parse*);
- int sqlite3GetTempReg(Parse*);
- void sqlite3ReleaseTempReg(Parse*,int);
- int sqlite3GetTempRange(Parse*,int);
- void sqlite3ReleaseTempRange(Parse*,int,int);
- Expr *sqlite3Expr(sqlite3*, int, Expr*, Expr*, const Token*);
- Expr *sqlite3PExpr(Parse*, int, Expr*, Expr*, const Token*);
- Expr *sqlite3RegisterExpr(Parse*,Token*);
- Expr *sqlite3ExprAnd(sqlite3*,Expr*, Expr*);
- void sqlite3ExprSpan(Expr*,Token*,Token*);
- Expr *sqlite3ExprFunction(Parse*,ExprList*, Token*);
- void sqlite3ExprAssignVarNumber(Parse*, Expr*);
- void sqlite3ExprDelete(Expr*);
- ExprList *sqlite3ExprListAppend(Parse*,ExprList*,Expr*,Token*);
- void sqlite3ExprListDelete(ExprList*);
- int sqlite3Init(sqlite3*, char**);
- int sqlite3InitCallback(void*, int, char**, char**);
- void sqlite3Pragma(Parse*,Token*,Token*,Token*,int);
- void sqlite3ResetInternalSchema(sqlite3*, int);
- void sqlite3BeginParse(Parse*,int);
- void sqlite3CommitInternalChanges(sqlite3*);
- Table *sqlite3ResultSetOfSelect(Parse*,char*,Select*);
- void sqlite3OpenMasterTable(Parse *, int);
- void sqlite3StartTable(Parse*,Token*,Token*,int,int,int,int);
- void sqlite3AddColumn(Parse*,Token*);
- void sqlite3AddNotNull(Parse*, int);
- void sqlite3AddPrimaryKey(Parse*, ExprList*, int, int, int);
- void sqlite3AddCheckConstraint(Parse*, Expr*);
- void sqlite3AddColumnType(Parse*,Token*);
- void sqlite3AddDefaultValue(Parse*,Expr*);
- void sqlite3AddCollateType(Parse*, Token*);
- void sqlite3EndTable(Parse*,Token*,Token*,Select*);
- Bitvec *sqlite3BitvecCreate(u32);
- int sqlite3BitvecTest(Bitvec*, u32);
- int sqlite3BitvecSet(Bitvec*, u32);
- void sqlite3BitvecClear(Bitvec*, u32);
- void sqlite3BitvecDestroy(Bitvec*);
- int sqlite3BitvecBuiltinTest(int,int*);
- void sqlite3CreateView(Parse*,Token*,Token*,Token*,Select*,int,int);
- #if !defined(SQLITE_OMIT_VIEW) || !defined(SQLITE_OMIT_VIRTUALTABLE)
- int sqlite3ViewGetColumnNames(Parse*,Table*);
- #else
- # define sqlite3ViewGetColumnNames(A,B) 0
- #endif
- void sqlite3DropTable(Parse*, SrcList*, int, int);
- void sqlite3DeleteTable(Table*);
- void sqlite3Insert(Parse*, SrcList*, ExprList*, Select*, IdList*, int);
- void *sqlite3ArrayAllocate(sqlite3*,void*,int,int,int*,int*,int*);
- IdList *sqlite3IdListAppend(sqlite3*, IdList*, Token*);
- int sqlite3IdListIndex(IdList*,const char*);
- SrcList *sqlite3SrcListAppend(sqlite3*, SrcList*, Token*, Token*);
- SrcList *sqlite3SrcListAppendFromTerm(Parse*, SrcList*, Token*, Token*, Token*,
- Select*, Expr*, IdList*);
- void sqlite3SrcListShiftJoinType(SrcList*);
- void sqlite3SrcListAssignCursors(Parse*, SrcList*);
- void sqlite3IdListDelete(IdList*);
- void sqlite3SrcListDelete(SrcList*);
- void sqlite3CreateIndex(Parse*,Token*,Token*,SrcList*,ExprList*,int,Token*,
- Token*, int, int);
- void sqlite3DropIndex(Parse*, SrcList*, int);
- int sqlite3Select(Parse*, Select*, SelectDest*, Select*, int, int*, char *aff);
- Select *sqlite3SelectNew(Parse*,ExprList*,SrcList*,Expr*,ExprList*,
- Expr*,ExprList*,int,Expr*,Expr*);
- void sqlite3SelectDelete(Select*);
- Table *sqlite3SrcListLookup(Parse*, SrcList*);
- int sqlite3IsReadOnly(Parse*, Table*, int);
- void sqlite3OpenTable(Parse*, int iCur, int iDb, Table*, int);
- void sqlite3DeleteFrom(Parse*, SrcList*, Expr*);
- void sqlite3Update(Parse*, SrcList*, ExprList*, Expr*, int);
- WhereInfo *sqlite3WhereBegin(Parse*, SrcList*, Expr*, ExprList**, u8);
- void sqlite3WhereEnd(WhereInfo*);
- int sqlite3ExprCodeGetColumn(Parse*, Table*, int, int, int, int);
- void sqlite3ExprCodeMove(Parse*, int, int);
- void sqlite3ExprClearColumnCache(Parse*, int);
- void sqlite3ExprCacheAffinityChange(Parse*, int, int);
- int sqlite3ExprWritableRegister(Parse*,int,int);
- void sqlite3ExprHardCopy(Parse*,int,int);
- int sqlite3ExprCode(Parse*, Expr*, int);
- int sqlite3ExprCodeTemp(Parse*, Expr*, int*);
- int sqlite3ExprCodeTarget(Parse*, Expr*, int);
- int sqlite3ExprCodeAndCache(Parse*, Expr*, int);
- void sqlite3ExprCodeConstants(Parse*, Expr*);
- int sqlite3ExprCodeExprList(Parse*, ExprList*, int, int);
- void sqlite3ExprIfTrue(Parse*, Expr*, int, int);
- void sqlite3ExprIfFalse(Parse*, Expr*, int, int);
- Table *sqlite3FindTable(sqlite3*,const char*, const char*);
- Table *sqlite3LocateTable(Parse*,int isView,const char*, const char*);
- Index *sqlite3FindIndex(sqlite3*,const char*, const char*);
- void sqlite3UnlinkAndDeleteTable(sqlite3*,int,const char*);
- void sqlite3UnlinkAndDeleteIndex(sqlite3*,int,const char*);
- void sqlite3Vacuum(Parse*);
- int sqlite3RunVacuum(char**, sqlite3*);
- char *sqlite3NameFromToken(sqlite3*, Token*);
- int sqlite3ExprCompare(Expr*, Expr*);
- int sqlite3ExprResolveNames(NameContext *, Expr *);
- void sqlite3ExprAnalyzeAggregates(NameContext*, Expr*);
- void sqlite3ExprAnalyzeAggList(NameContext*,ExprList*);
- Vdbe *sqlite3GetVdbe(Parse*);
- Expr *sqlite3CreateIdExpr(Parse *, const char*);
- void sqlite3PrngSaveState(void);
- void sqlite3PrngRestoreState(void);
- void sqlite3PrngResetState(void);
- void sqlite3RollbackAll(sqlite3*);
- void sqlite3CodeVerifySchema(Parse*, int);
- void sqlite3BeginTransaction(Parse*, int);
- void sqlite3CommitTransaction(Parse*);
- void sqlite3RollbackTransaction(Parse*);
- int sqlite3ExprIsConstant(Expr*);
- int sqlite3ExprIsConstantNotJoin(Expr*);
- int sqlite3ExprIsConstantOrFunction(Expr*);
- int sqlite3ExprIsInteger(Expr*, int*);
- int sqlite3IsRowid(const char*);
- void sqlite3GenerateRowDelete(Parse*, Table*, int, int, int);
- void sqlite3GenerateRowIndexDelete(Parse*, Table*, int, int*);
- int sqlite3GenerateIndexKey(Parse*, Index*, int, int, int);
- void sqlite3GenerateConstraintChecks(Parse*,Table*,int,int,
- int*,int,int,int,int);
- void sqlite3CompleteInsertion(Parse*, Table*, int, int, int*,int,int,int,int);
- int sqlite3OpenTableAndIndices(Parse*, Table*, int, int);
- void sqlite3BeginWriteOperation(Parse*, int, int);
- Expr *sqlite3ExprDup(sqlite3*,Expr*);
- void sqlite3TokenCopy(sqlite3*,Token*, Token*);
- ExprList *sqlite3ExprListDup(sqlite3*,ExprList*);
- SrcList *sqlite3SrcListDup(sqlite3*,SrcList*);
- IdList *sqlite3IdListDup(sqlite3*,IdList*);
- Select *sqlite3SelectDup(sqlite3*,Select*);
- FuncDef *sqlite3FindFunction(sqlite3*,const char*,int,int,u8,int);
- void sqlite3RegisterBuiltinFunctions(sqlite3*);
- void sqlite3RegisterDateTimeFunctions(sqlite3*);
- #ifdef SQLITE_DEBUG
- int sqlite3SafetyOn(sqlite3*);
- int sqlite3SafetyOff(sqlite3*);
- #else
- # define sqlite3SafetyOn(A) 0
- # define sqlite3SafetyOff(A) 0
- #endif
- int sqlite3SafetyCheckOk(sqlite3*);
- int sqlite3SafetyCheckSickOrOk(sqlite3*);
- void sqlite3ChangeCookie(Parse*, int);
- void sqlite3MaterializeView(Parse*, Select*, Expr*, int);
- #ifndef SQLITE_OMIT_TRIGGER
- void sqlite3BeginTrigger(Parse*, Token*,Token*,int,int,IdList*,SrcList*,
- Expr*,int, int);
- void sqlite3FinishTrigger(Parse*, TriggerStep*, Token*);
- void sqlite3DropTrigger(Parse*, SrcList*, int);
- void sqlite3DropTriggerPtr(Parse*, Trigger*);
- int sqlite3TriggersExist(Parse*, Table*, int, ExprList*);
- int sqlite3CodeRowTrigger(Parse*, int, ExprList*, int, Table *, int, int,
- int, int, u32*, u32*);
- void sqliteViewTriggers(Parse*, Table*, Expr*, int, ExprList*);
- void sqlite3DeleteTriggerStep(TriggerStep*);
- TriggerStep *sqlite3TriggerSelectStep(sqlite3*,Select*);
- TriggerStep *sqlite3TriggerInsertStep(sqlite3*,Token*, IdList*,
- ExprList*,Select*,int);
- TriggerStep *sqlite3TriggerUpdateStep(sqlite3*,Token*,ExprList*, Expr*, int);
- TriggerStep *sqlite3TriggerDeleteStep(sqlite3*,Token*, Expr*);
- void sqlite3DeleteTrigger(Trigger*);
- void sqlite3UnlinkAndDeleteTrigger(sqlite3*,int,const char*);
- #else
- # define sqlite3TriggersExist(A,B,C,D,E,F) 0
- # define sqlite3DeleteTrigger(A)
- # define sqlite3DropTriggerPtr(A,B)
- # define sqlite3UnlinkAndDeleteTrigger(A,B,C)
- # define sqlite3CodeRowTrigger(A,B,C,D,E,F,G,H,I,J,K) 0
- #endif
- int sqlite3JoinType(Parse*, Token*, Token*, Token*);
- void sqlite3CreateForeignKey(Parse*, ExprList*, Token*, ExprList*, int);
- void sqlite3DeferForeignKey(Parse*, int);
- #ifndef SQLITE_OMIT_AUTHORIZATION
- void sqlite3AuthRead(Parse*,Expr*,Schema*,SrcList*);
- int sqlite3AuthCheck(Parse*,int, const char*, const char*, const char*);
- void sqlite3AuthContextPush(Parse*, AuthContext*, const char*);
- void sqlite3AuthContextPop(AuthContext*);
- #else
- # define sqlite3AuthRead(a,b,c,d)
- # define sqlite3AuthCheck(a,b,c,d,e) SQLITE_OK
- # define sqlite3AuthContextPush(a,b,c)
- # define sqlite3AuthContextPop(a) ((void)(a))
- #endif
- void sqlite3Attach(Parse*, Expr*, Expr*, Expr*);
- void sqlite3Detach(Parse*, Expr*);
- int sqlite3BtreeFactory(const sqlite3 *db, const char *zFilename,
- int omitJournal, int nCache, int flags, Btree **ppBtree);
- int sqlite3FixInit(DbFixer*, Parse*, int, const char*, const Token*);
- int sqlite3FixSrcList(DbFixer*, SrcList*);
- int sqlite3FixSelect(DbFixer*, Select*);
- int sqlite3FixExpr(DbFixer*, Expr*);
- int sqlite3FixExprList(DbFixer*, ExprList*);
- int sqlite3FixTriggerStep(DbFixer*, TriggerStep*);
- int sqlite3AtoF(const char *z, double*);
- char *sqlite3_snprintf(int,char*,const char*,...);
- int sqlite3GetInt32(const char *, int*);
- int sqlite3FitsIn64Bits(const char *, int);
- int sqlite3Utf16ByteLen(const void *pData, int nChar);
- int sqlite3Utf8CharLen(const char *pData, int nByte);
- int sqlite3Utf8Read(const u8*, const u8*, const u8**);
- int sqlite3PutVarint(unsigned char*, u64);
- int sqlite3PutVarint32(unsigned char*, u32);
- int sqlite3GetVarint(const unsigned char *, u64 *);
- int sqlite3GetVarint32(const unsigned char *, u32 *);
- int sqlite3VarintLen(u64 v);
- void sqlite3IndexAffinityStr(Vdbe *, Index *);
- void sqlite3TableAffinityStr(Vdbe *, Table *);
- char sqlite3CompareAffinity(Expr *pExpr, char aff2);
- int sqlite3IndexAffinityOk(Expr *pExpr, char idx_affinity);
- char sqlite3ExprAffinity(Expr *pExpr);
- int sqlite3Atoi64(const char*, i64*);
- void sqlite3Error(sqlite3*, int, const char*,...);
- void *sqlite3HexToBlob(sqlite3*, const char *z, int n);
- int sqlite3TwoPartName(Parse *, Token *, Token *, Token **);
- const char *sqlite3ErrStr(int);
- int sqlite3ReadSchema(Parse *pParse);
- CollSeq *sqlite3FindCollSeq(sqlite3*,u8 enc, const char *,int,int);
- CollSeq *sqlite3LocateCollSeq(Parse *pParse, const char *zName, int nName);
- CollSeq *sqlite3ExprCollSeq(Parse *pParse, Expr *pExpr);
- Expr *sqlite3ExprSetColl(Parse *pParse, Expr *, Token *);
- int sqlite3CheckCollSeq(Parse *, CollSeq *);
- int sqlite3CheckObjectName(Parse *, const char *);
- void sqlite3VdbeSetChanges(sqlite3 *, int);
- const void *sqlite3ValueText(sqlite3_value*, u8);
- int sqlite3ValueBytes(sqlite3_value*, u8);
- void sqlite3ValueSetStr(sqlite3_value*, int, const void *,u8,
- void(*)(void*));
- void sqlite3ValueFree(sqlite3_value*);
- sqlite3_value *sqlite3ValueNew(sqlite3 *);
- char *sqlite3Utf16to8(sqlite3 *, const void*, int);
- int sqlite3ValueFromExpr(sqlite3 *, Expr *, u8, u8, sqlite3_value **);
- void sqlite3ValueApplyAffinity(sqlite3_value *, u8, u8);
- #ifndef SQLITE_AMALGAMATION
- extern const unsigned char sqlite3UpperToLower[];
- #endif
- void sqlite3RootPageMoved(Db*, int, int);
- void sqlite3Reindex(Parse*, Token*, Token*);
- void sqlite3AlterFunctions(sqlite3*);
- void sqlite3AlterRenameTable(Parse*, SrcList*, Token*);
- int sqlite3GetToken(const unsigned char *, int *);
- void sqlite3NestedParse(Parse*, const char*, ...);
- void sqlite3ExpirePreparedStatements(sqlite3*);
- void sqlite3CodeSubselect(Parse *, Expr *);
- int sqlite3SelectResolve(Parse *, Select *, NameContext *);
- void sqlite3ColumnDefault(Vdbe *, Table *, int);
- void sqlite3AlterFinishAddColumn(Parse *, Token *);
- void sqlite3AlterBeginAddColumn(Parse *, SrcList *);
- CollSeq *sqlite3GetCollSeq(sqlite3*, CollSeq *, const char *, int);
- char sqlite3AffinityType(const Token*);
- void sqlite3Analyze(Parse*, Token*, Token*);
- int sqlite3InvokeBusyHandler(BusyHandler*);
- int sqlite3FindDb(sqlite3*, Token*);
- int sqlite3AnalysisLoad(sqlite3*,int iDB);
- void sqlite3DefaultRowEst(Index*);
- void sqlite3RegisterLikeFunctions(sqlite3*, int);
- int sqlite3IsLikeFunction(sqlite3*,Expr*,int*,char*);
- void sqlite3AttachFunctions(sqlite3 *);
- void sqlite3MinimumFileFormat(Parse*, int, int);
- void sqlite3SchemaFree(void *);
- Schema *sqlite3SchemaGet(sqlite3 *, Btree *);
- int sqlite3SchemaToIndex(sqlite3 *db, Schema *);
- KeyInfo *sqlite3IndexKeyinfo(Parse *, Index *);
- int sqlite3CreateFunc(sqlite3 *, const char *, int, int, void *,
- void (*)(sqlite3_context*,int,sqlite3_value **),
- void (*)(sqlite3_context*,int,sqlite3_value **), void (*)(sqlite3_context*));
- int sqlite3ApiExit(sqlite3 *db, int);
- int sqlite3OpenTempDatabase(Parse *);
- void sqlite3StrAccumAppend(StrAccum*,const char*,int);
- char *sqlite3StrAccumFinish(StrAccum*);
- void sqlite3StrAccumReset(StrAccum*);
- void sqlite3SelectDestInit(SelectDest*,int,int);
- /*
- ** The interface to the LEMON-generated parser
- */
- void *sqlite3ParserAlloc(void*(*)(size_t));
- void sqlite3ParserFree(void*, void(*)(void*));
- void sqlite3Parser(void*, int, Token, Parse*);
- int sqlite3AutoLoadExtensions(sqlite3*);
- #ifndef SQLITE_OMIT_LOAD_EXTENSION
- void sqlite3CloseExtensions(sqlite3*);
- #else
- # define sqlite3CloseExtensions(X)
- #endif
- #ifndef SQLITE_OMIT_SHARED_CACHE
- void sqlite3TableLock(Parse *, int, int, u8, const char *);
- #else
- #define sqlite3TableLock(v,w,x,y,z)
- #endif
- #ifdef SQLITE_TEST
- int sqlite3Utf8To8(unsigned char*);
- #endif
- #ifdef SQLITE_OMIT_VIRTUALTABLE
- # define sqlite3VtabClear(X)
- # define sqlite3VtabSync(X,Y) (Y)
- # define sqlite3VtabRollback(X)
- # define sqlite3VtabCommit(X)
- #else
- void sqlite3VtabClear(Table*);
- int sqlite3VtabSync(sqlite3 *db, int rc);
- int sqlite3VtabRollback(sqlite3 *db);
- int sqlite3VtabCommit(sqlite3 *db);
- #endif
- void sqlite3VtabLock(sqlite3_vtab*);
- void sqlite3VtabUnlock(sqlite3*, sqlite3_vtab*);
- void sqlite3VtabBeginParse(Parse*, Token*, Token*, Token*);
- void sqlite3VtabFinishParse(Parse*, Token*);
- void sqlite3VtabArgInit(Parse*);
- void sqlite3VtabArgExtend(Parse*, Token*);
- int sqlite3VtabCallCreate(sqlite3*, int, const char *, char **);
- int sqlite3VtabCallConnect(Parse*, Table*);
- int sqlite3VtabCallDestroy(sqlite3*, int, const char *);
- int sqlite3VtabBegin(sqlite3 *, sqlite3_vtab *);
- FuncDef *sqlite3VtabOverloadFunction(sqlite3 *,FuncDef*, int nArg, Expr*);
- void sqlite3InvalidFunction(sqlite3_context*,int,sqlite3_value**);
- int sqlite3Reprepare(Vdbe*);
- void sqlite3ExprListCheckLength(Parse*, ExprList*, const char*);
- CollSeq *sqlite3BinaryCompareCollSeq(Parse *, Expr *, Expr *);
- /*
- ** Available fault injectors. Should be numbered beginning with 0.
- */
- #define SQLITE_FAULTINJECTOR_MALLOC 0
- #define SQLITE_FAULTINJECTOR_COUNT 1
- /*
- ** The interface to the fault injector subsystem. If the fault injector
- ** mechanism is disabled at compile-time then set up macros so that no
- ** unnecessary code is generated.
- */
- #ifndef SQLITE_OMIT_BUILTIN_TEST
- void sqlite3FaultConfig(int,int,int);
- int sqlite3FaultFailures(int);
- int sqlite3FaultBenignFailures(int);
- int sqlite3FaultPending(int);
- void sqlite3FaultBenign(int,int);
- int sqlite3FaultStep(int);
- #else
- # define sqlite3FaultConfig(A,B,C)
- # define sqlite3FaultFailures(A) 0
- # define sqlite3FaultBenignFailures(A) 0
- # define sqlite3FaultPending(A) (-1)
- # define sqlite3FaultBenign(A,B)
- # define sqlite3FaultStep(A) 0
- #endif
-
-
- #define IN_INDEX_ROWID 1
- #define IN_INDEX_EPH 2
- #define IN_INDEX_INDEX 3
- int sqlite3FindInIndex(Parse *, Expr *, int);
- #ifdef SQLITE_ENABLE_ATOMIC_WRITE
- int sqlite3JournalOpen(sqlite3_vfs *, const char *, sqlite3_file *, int, int);
- int sqlite3JournalSize(sqlite3_vfs *);
- int sqlite3JournalCreate(sqlite3_file *);
- #else
- #define sqlite3JournalSize(pVfs) ((pVfs)->szOsFile)
- #endif
- #if defined(SQLITE_TEST) || SQLITE_MAX_EXPR_DEPTH>0
- void sqlite3ExprSetHeight(Expr *);
- int sqlite3SelectExprHeight(Select *);
- #else
- #define sqlite3ExprSetHeight(x)
- #endif
- u32 sqlite3Get4byte(const u8*);
- void sqlite3Put4byte(u8*, u32);
- #ifdef SQLITE_SSE
- #include "sseInt.h"
- #endif
- #ifdef SQLITE_DEBUG
- void sqlite3ParserTrace(FILE*, char *);
- #endif
- /*
- ** If the SQLITE_ENABLE IOTRACE exists then the global variable
- ** sqlite3IoTrace is a pointer to a printf-like routine used to
- ** print I/O tracing messages.
- */
- #ifdef SQLITE_ENABLE_IOTRACE
- # define IOTRACE(A) if( sqlite3IoTrace ){ sqlite3IoTrace A; }
- void sqlite3VdbeIOTraceSql(Vdbe*);
- #else
- # define IOTRACE(A)
- # define sqlite3VdbeIOTraceSql(X)
- #endif
- SQLITE_EXTERN void (*sqlite3IoTrace)(const char*,...);
- #endif