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Diffstat (limited to 'ext/pdo_sqlite/sqlite/src/sqliteInt.h')
| -rw-r--r-- | ext/pdo_sqlite/sqlite/src/sqliteInt.h | 1572 |
1 files changed, 0 insertions, 1572 deletions
diff --git a/ext/pdo_sqlite/sqlite/src/sqliteInt.h b/ext/pdo_sqlite/sqlite/src/sqliteInt.h deleted file mode 100644 index f0ffbd2e85..0000000000 --- a/ext/pdo_sqlite/sqlite/src/sqliteInt.h +++ /dev/null @@ -1,1572 +0,0 @@ -/* -** 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. -** -** @(#) $Id$ -*/ -#ifndef _SQLITEINT_H_ -#define _SQLITEINT_H_ - -/* -** 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. -** -** 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 - -#include "config.h" -#include "sqlite3.h" -#include "hash.h" -#include "parse.h" -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <assert.h> -#include <stddef.h> - -/* -** The maximum number of in-memory pages to use for the main database -** table and for temporary tables. Internally, the MAX_PAGES and -** TEMP_PAGES macros are used. To override the default values at -** compilation time, the SQLITE_DEFAULT_CACHE_SIZE and -** SQLITE_DEFAULT_TEMP_CACHE_SIZE macros should be set. -*/ -#ifdef SQLITE_DEFAULT_CACHE_SIZE -# define MAX_PAGES SQLITE_DEFAULT_CACHE_SIZE -#else -# define MAX_PAGES 2000 -#endif -#ifdef SQLITE_DEFAULT_TEMP_CACHE_SIZE -# define TEMP_PAGES SQLITE_DEFAULT_TEMP_CACHE_SIZE -#else -# define TEMP_PAGES 500 -#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 for the SELECT DISTINCT statement and for UNION or EXCEPT -** compound queries. No other SQL database engine (among those tested) -** works this way except for OCELOT. But the SQL92 spec implies that -** this is how things should work. -** -** If the following macro is set to 0, then NULLs are indistinct for -** SELECT DISTINCT and for UNION. -*/ -#define NULL_ALWAYS_DISTINCT 0 - -/* -** 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 maximum number of attached databases. This must be at least 2 -** in order to support the main database file (0) and the file used to -** hold temporary tables (1). And it must be less than 32 because -** we use a bitmask of databases with a u32 in places (for example -** the Parse.cookieMask field). -*/ -#define MAX_ATTACHED 10 - -/* -** The maximum value of a ?nnn wildcard that the parser will accept. -*/ -#define SQLITE_MAX_VARIABLE_NUMBER 999 - -/* -** When building SQLite for embedded systems where memory is scarce, -** you can define one or more of the following macros to omit extra -** features of the library and thus keep the size of the library to -** a minimum. -*/ -/* #define SQLITE_OMIT_AUTHORIZATION 1 */ -/* #define SQLITE_OMIT_MEMORYDB 1 */ -/* #define SQLITE_OMIT_VACUUM 1 */ -/* #define SQLITE_OMIT_DATETIME_FUNCS 1 */ -/* #define SQLITE_OMIT_PROGRESS_CALLBACK 1 */ -/* #define SQLITE_OMIT_AUTOVACUUM */ -/* #define SQLITE_OMIT_ALTERTABLE */ - -/* -** 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 - -/* -** 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 UINT64_TYPE -# if defined(_MSC_VER) || defined(__BORLANDC__) -# define UINT64_TYPE unsigned __int64 -# else -# define UINT64_TYPE unsigned long long int -# endif -#endif -#ifndef UINT32_TYPE -# define UINT32_TYPE unsigned int -#endif -#ifndef UINT16_TYPE -# define UINT16_TYPE unsigned short int -#endif -#ifndef INT16_TYPE -# define INT16_TYPE short int -#endif -#ifndef UINT8_TYPE -# define UINT8_TYPE unsigned char -#endif -#ifndef INT8_TYPE -# define INT8_TYPE signed char -#endif -#ifndef LONGDOUBLE_TYPE -# define LONGDOUBLE_TYPE long double -#endif -typedef sqlite_int64 i64; /* 8-byte signed integer */ -typedef UINT64_TYPE 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. -*/ -extern const int sqlite3one; -#define SQLITE_BIGENDIAN (*(char *)(&sqlite3one)==0) -#define SQLITE_LITTLEENDIAN (*(char *)(&sqlite3one)==1) - -/* -** 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 */ -}; - -/* -** Defer sourcing vdbe.h and btree.h until after the "u8" and -** "BusyHandler typedefs. -*/ -#include "vdbe.h" -#include "btree.h" - -/* -** This macro casts a pointer to an integer. Useful for doing -** pointer arithmetic. -*/ -#define Addr(X) ((uptr)X) - -/* -** If memory allocation problems are found, recompile with -** -** -DSQLITE_DEBUG=1 -** -** to enable some sanity checking on malloc() and free(). To -** check for memory leaks, recompile with -** -** -DSQLITE_DEBUG=2 -** -** and a line of text will be written to standard error for -** each malloc() and free(). This output can be analyzed -** by an AWK script to determine if there are any leaks. -*/ -#ifdef SQLITE_MEMDEBUG -# define sqliteMalloc(X) sqlite3Malloc_(X,1,__FILE__,__LINE__) -# define sqliteMallocRaw(X) sqlite3Malloc_(X,0,__FILE__,__LINE__) -# define sqliteFree(X) sqlite3Free_(X,__FILE__,__LINE__) -# define sqliteRealloc(X,Y) sqlite3Realloc_(X,Y,__FILE__,__LINE__) -# define sqliteStrDup(X) sqlite3StrDup_(X,__FILE__,__LINE__) -# define sqliteStrNDup(X,Y) sqlite3StrNDup_(X,Y,__FILE__,__LINE__) -#else -# define sqliteFree sqlite3FreeX -# define sqliteMalloc sqlite3Malloc -# define sqliteMallocRaw sqlite3MallocRaw -# define sqliteRealloc sqlite3Realloc -# define sqliteStrDup sqlite3StrDup -# define sqliteStrNDup sqlite3StrNDup -#endif - -/* -** This variable gets set if malloc() ever fails. After it gets set, -** the SQLite library shuts down permanently. -*/ -extern int sqlite3_malloc_failed; - -/* -** The following global variables are used for testing and debugging -** only. They only work if SQLITE_DEBUG is defined. -*/ -#ifdef SQLITE_MEMDEBUG -extern int sqlite3_nMalloc; /* Number of sqliteMalloc() calls */ -extern int sqlite3_nFree; /* Number of sqliteFree() calls */ -extern int sqlite3_iMallocFail; /* Fail sqliteMalloc() after this many calls */ -extern int sqlite3_iMallocReset; /* Set iMallocFail to this when it reaches 0 */ -#endif - -/* -** 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 Column Column; -typedef struct Table Table; -typedef struct Index Index; -typedef struct Expr Expr; -typedef struct ExprList ExprList; -typedef struct Parse Parse; -typedef struct Token Token; -typedef struct IdList IdList; -typedef struct SrcList SrcList; -typedef struct WhereInfo WhereInfo; -typedef struct WhereLevel WhereLevel; -typedef struct Select Select; -typedef struct AggExpr AggExpr; -typedef struct FuncDef FuncDef; -typedef struct Trigger Trigger; -typedef struct TriggerStep TriggerStep; -typedef struct TriggerStack TriggerStack; -typedef struct FKey FKey; -typedef struct Db Db; -typedef struct AuthContext AuthContext; -typedef struct KeyClass KeyClass; -typedef struct CollSeq CollSeq; -typedef struct KeyInfo KeyInfo; -typedef struct NameContext NameContext; - -/* -** 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 */ - 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 */ - u16 flags; /* Flags associated with this database */ - u8 inTrans; /* 0: not writable. 1: Transaction. 2: Checkpoint */ - u8 safety_level; /* How aggressive at synching data to disk */ - int cache_size; /* Number of pages to use in the cache */ - Table *pSeqTab; /* The sqlite_sequence table used by AUTOINCREMENT */ - void *pAux; /* Auxiliary data. Usually NULL */ - void (*xFreeAux)(void*); /* Routine to free pAux */ -}; - -/* -** These macros can be used to test, set, or clear bits in the -** Db.flags field. -*/ -#define DbHasProperty(D,I,P) (((D)->aDb[I].flags&(P))==(P)) -#define DbHasAnyProperty(D,I,P) (((D)->aDb[I].flags&(P))!=0) -#define DbSetProperty(D,I,P) (D)->aDb[I].flags|=(P) -#define DbClearProperty(D,I,P) (D)->aDb[I].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 SQLITE_UTF16NATIVE (SQLITE_BIGENDIAN?SQLITE_UTF16BE:SQLITE_UTF16LE) - -/* -** 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 { - int nDb; /* Number of backends currently in use */ - Db *aDb; /* All backends */ - int flags; /* Miscellanous flags. See below */ - int errCode; /* Most recent error code (SQLITE_*) */ - u8 enc; /* Text encoding for this database. */ - u8 autoCommit; /* The auto-commit flag. */ - u8 file_format; /* What file format version is this database? */ - u8 temp_store; /* 1: file 2: memory 0: default */ - 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() */ - 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; - 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 *pCommitArg; /* Argument to xCommitCallback() */ - int (*xCommitCallback)(void*);/* Invoked at every commit. */ - void(*xCollNeeded)(void*,sqlite3*,int eTextRep,const char*); - void(*xCollNeeded16)(void*,sqlite3*,int eTextRep,const void*); - void *pCollNeededArg; - sqlite3_value *pValue; /* Value used for transient conversions */ - 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) */ -#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_GLOBALRECOVER - sqlite3 *pNext; /* Linked list of open db handles. */ -#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 -}; - -/* -** 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_Initialized 0x00000002 /* True after initialization */ -#define SQLITE_Interrupt 0x00000004 /* Cancel current operation */ -#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 */ - -/* -** 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_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 { - char *zName; /* SQL name of the function */ - int nArg; /* Number of arguments. -1 means unlimited */ - u8 iPrefEnc; /* Preferred text encoding (SQLITE_UTF8, 16LE, 16BE) */ - 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 */ - u8 needCollSeq; /* True if sqlite3GetFuncCollSeq() might be called */ -}; - -/* -** 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 */ - CollSeq *pColl; /* 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 */ -}; - -/* -** 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 -** transalations, 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() */ - void *pUser; /* First argument to xCmp() */ - int (*xCmp)(void*,int, const void*, int, const void*); -}; - -/* -** 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. -*/ -#define SQLITE_AFF_INTEGER 'i' -#define SQLITE_AFF_NUMERIC 'n' -#define SQLITE_AFF_TEXT 't' -#define SQLITE_AFF_NONE 'o' - - -/* -** 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.isTransient -** 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. */ - u8 readOnly; /* True if this table should not be written by the user */ - u8 iDb; /* Index into sqlite.aDb[] of the backend for this table */ - u8 isTransient; /* True if automatically deleted when VDBE finishes */ - 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 */ - 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_ALTERTABLE - int addColOffset; /* Offset in CREATE TABLE statement to add a new column */ -#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 contraint -** 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 { - u8 enc; /* Text encoding - one of the TEXT_Utf* values */ - u8 incrKey; /* Increase 2nd key by epsilon before comparison */ - 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 */ - 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) */ - u8 iDb; /* Index in sqlite.aDb[] of where this index is stored */ - char *zColAff; /* String defining the affinity of each column */ - Index *pNext; /* The next index associated with the same table */ - KeyInfo keyInfo; /* Info on how to order keys. MUST BE LAST */ -}; - -/* -** 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 */ -}; - -/* -** 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 */ - u8 iDb; /* Database referenced by this expression */ - u8 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. */ - int iAgg; /* When op==TK_COLUMN and pParse->fillAgg==FALSE, pull - ** result from the iAgg-th element of the aggregator */ - int iAggCtx; /* The value to pass as P1 of OP_AggGet. */ - Select *pSelect; /* When the expression is a sub-select. Also the - ** right side of "<expr> IN (<select>)" */ - Table *pTab; /* Table for OP_Column expressions. */ -}; - -/* -** 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_Not 0x0010 /* Operator preceeded by NOT */ -#define EP_VarSelect 0x0020 /* pSelect is correlated, not constant */ - -/* -** 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 */ - 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 { - int nId; /* Number of identifiers on the list */ - int nAlloc; /* Number of entries allocated for a[] below */ - struct IdList_item { - char *zName; /* Name of the identifier */ - int idx; /* Index in some Table.aCol[] of a column named zName */ - } *a; -}; - -/* -** The bitmask datatype defined below is used for various optimizations. -*/ -typedef unsigned int 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. -*/ -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 */ - int jointype; /* Type of join between this table and the next */ - 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_NATURAL 0x0002 /* True for a "natural" join */ -#define JT_LEFT 0x0004 /* Left outer join */ -#define JT_RIGHT 0x0008 /* Right outer join */ -#define JT_OUTER 0x0010 /* The "OUTER" keyword is present */ -#define JT_ERROR 0x0020 /* 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. -*/ -struct WhereLevel { - int iMem; /* Memory cell used by this level */ - 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 score; /* How well this index scored */ - int brk; /* Jump here to break out of the loop */ - int cont; /* Jump here to continue with the next loop cycle */ - int op, p1, p2; /* Opcode used to terminate the loop */ - int iLeftJoin; /* Memory cell used to implement LEFT OUTER JOIN */ - int top; /* First instruction of interior of the loop */ - int inOp, inP1, inP2;/* Opcode used to implement an IN operator */ - int bRev; /* Do the scan in the reverse direction */ -}; - -/* -** 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; - 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 */ - 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; - int nDepth; /* Depth of subquery recursion. 1 for no recursion */ - 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. -*/ -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 */ - 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 */ - 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 */ - IdList **ppOpenTemp; /* OP_OpenTemp addresses used by multi-selects */ - u8 isResolved; /* True once sqlite3SelectResolve() has run. */ - u8 isAgg; /* True if this is an aggregate query */ -}; - -/* -** The results of a select can be distributed in several ways. -*/ -#define SRT_Callback 1 /* Invoke a callback with each row of result */ -#define SRT_Mem 2 /* Store result in a memory cell */ -#define SRT_Set 3 /* Store result as unique keys in a table */ -#define SRT_Union 5 /* Store result as keys in a table */ -#define SRT_Except 6 /* Remove result from a UNION table */ -#define SRT_Table 7 /* Store result as data with a unique key */ -#define SRT_TempTable 8 /* Store result in a trasient table */ -#define SRT_Discard 9 /* Do not save the results anywhere */ -#define SRT_Sorter 10 /* Store results in the sorter */ -#define SRT_Subroutine 11 /* Call a subroutine to handle results */ -#define SRT_Exists 12 /* Put 0 or 1 in a memory cell */ - -/* -** When a SELECT uses aggregate functions (like "count(*)" or "avg(f1)") -** we have to do some additional analysis of expressions. An instance -** of the following structure holds information about a single subexpression -** somewhere in the SELECT statement. An array of these structures holds -** all the information we need to generate code for aggregate -** expressions. -** -** Note that when analyzing a SELECT containing aggregates, both -** non-aggregate field variables and aggregate functions are stored -** in the AggExpr array of the Parser structure. -** -** The pExpr field points to an expression that is part of either the -** field list, the GROUP BY clause, the HAVING clause or the ORDER BY -** clause. The expression will be freed when those clauses are cleaned -** up. Do not try to delete the expression attached to AggExpr.pExpr. -** -** If AggExpr.pExpr==0, that means the expression is "count(*)". -*/ -struct AggExpr { - int isAgg; /* if TRUE contains an aggregate function */ - Expr *pExpr; /* The expression */ - FuncDef *pFunc; /* Information about the aggregate function */ -}; - -/* -** 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. -*/ -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 fillAgg; /* If true, ignore the Expr.iAgg field. Normally false */ - 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 */ - 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[MAX_ATTACHED+2]; /* Values of cookies to verify */ - - /* 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 */ - int nAgg; /* Number of aggregate expressions */ - AggExpr *aAgg; /* An array of aggregate expressions */ - int nMaxDepth; /* Maximum depth of subquery recursion */ -}; - -/* -** 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 */ - -/* - * 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 iDb; /* Database containing this trigger */ - u8 iTabDb; /* Database containing Trigger.table */ - 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 */ - int foreach; /* One of TK_ROW or TK_STATEMENT */ - Token nameToken; /* Token containing zName. Use during parsing only */ - - 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 */ -}; - -/* - * 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 */ - 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 */ -}; - -/* -** 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 */ - char **pzErrMsg; /* Error message stored here */ -} InitData; - -/* - * This global flag is set for performance testing of triggers. When it is set - * SQLite will perform the overhead of building new and old trigger references - * even when no triggers exist - */ -extern int sqlite3_always_code_trigger_setup; - -/* -** Internal function prototypes -*/ -int sqlite3StrICmp(const char *, const char *); -int sqlite3StrNICmp(const char *, const char *, int); -int sqlite3HashNoCase(const char *, int); -int sqlite3IsNumber(const char*, int*, u8); -int sqlite3Compare(const char *, const char *); -int sqlite3SortCompare(const char *, const char *); -void sqlite3RealToSortable(double r, char *); -#ifdef SQLITE_MEMDEBUG - void *sqlite3Malloc_(int,int,char*,int); - void sqlite3Free_(void*,char*,int); - void *sqlite3Realloc_(void*,int,char*,int); - char *sqlite3StrDup_(const char*,char*,int); - char *sqlite3StrNDup_(const char*, int,char*,int); - void sqlite3CheckMemory(void*,int); -#else - void *sqlite3Malloc(int); - void *sqlite3MallocRaw(int); - void sqlite3Free(void*); - void *sqlite3Realloc(void*,int); - char *sqlite3StrDup(const char*); - char *sqlite3StrNDup(const char*, int); -# define sqlite3CheckMemory(a,b) -# define sqlite3MallocX sqlite3Malloc -#endif -void sqlite3FreeX(void*); -void *sqlite3MallocX(int); -char *sqlite3MPrintf(const char*, ...); -char *sqlite3VMPrintf(const char*, va_list); -void sqlite3DebugPrintf(const char*, ...); -void *sqlite3TextToPtr(const char*); -void sqlite3SetString(char **, ...); -void sqlite3ErrorMsg(Parse*, const char*, ...); -void sqlite3Dequote(char*); -int sqlite3KeywordCode(const char*, int); -int sqlite3RunParser(Parse*, const char*, char **); -void sqlite3FinishCoding(Parse*); -Expr *sqlite3Expr(int, Expr*, Expr*, const Token*); -Expr *sqlite3RegisterExpr(Parse*,Token*); -Expr *sqlite3ExprAnd(Expr*, Expr*); -void sqlite3ExprSpan(Expr*,Token*,Token*); -Expr *sqlite3ExprFunction(ExprList*, Token*); -void sqlite3ExprAssignVarNumber(Parse*, Expr*); -void sqlite3ExprDelete(Expr*); -ExprList *sqlite3ExprListAppend(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 sqlite3RollbackInternalChanges(sqlite3*); -void sqlite3CommitInternalChanges(sqlite3*); -Table *sqlite3ResultSetOfSelect(Parse*,char*,Select*); -void sqlite3OpenMasterTable(Vdbe *v, int); -void sqlite3StartTable(Parse*,Token*,Token*,Token*,int,int); -void sqlite3AddColumn(Parse*,Token*); -void sqlite3AddNotNull(Parse*, int); -void sqlite3AddPrimaryKey(Parse*, ExprList*, int, int); -void sqlite3AddColumnType(Parse*,Token*,Token*); -void sqlite3AddDefaultValue(Parse*,Expr*); -void sqlite3AddCollateType(Parse*, const char*, int); -void sqlite3EndTable(Parse*,Token*,Token*,Select*); - -#ifndef SQLITE_OMIT_VIEW - void sqlite3CreateView(Parse*,Token*,Token*,Token*,Select*,int); - int sqlite3ViewGetColumnNames(Parse*,Table*); -#else -# define sqlite3ViewGetColumnNames(A,B) 0 -#endif - -void sqlite3DropTable(Parse*, SrcList*, int); -void sqlite3DeleteTable(sqlite3*, Table*); -void sqlite3Insert(Parse*, SrcList*, ExprList*, Select*, IdList*, int); -IdList *sqlite3IdListAppend(IdList*, Token*); -int sqlite3IdListIndex(IdList*,const char*); -SrcList *sqlite3SrcListAppend(SrcList*, Token*, Token*); -void sqlite3SrcListAddAlias(SrcList*, Token*); -void sqlite3SrcListAssignCursors(Parse*, SrcList*); -void sqlite3IdListDelete(IdList*); -void sqlite3SrcListDelete(SrcList*); -void sqlite3CreateIndex(Parse*,Token*,Token*,SrcList*,ExprList*,int,Token*, - Token*); -void sqlite3DropIndex(Parse*, SrcList*); -void sqlite3AddKeyType(Vdbe*, ExprList*); -void sqlite3AddIdxKeyType(Vdbe*, Index*); -int sqlite3Select(Parse*, Select*, int, int, Select*, int, int*, char *aff); -Select *sqlite3SelectNew(ExprList*,SrcList*,Expr*,ExprList*,Expr*,ExprList*, - int,Expr*,Expr*); -void sqlite3SelectDelete(Select*); -void sqlite3SelectUnbind(Select*); -Table *sqlite3SrcListLookup(Parse*, SrcList*); -int sqlite3IsReadOnly(Parse*, Table*, int); -void sqlite3OpenTableForReading(Vdbe*, int iCur, Table*); -void sqlite3OpenTable(Vdbe*, int iCur, Table*, int); -void sqlite3DeleteFrom(Parse*, SrcList*, Expr*); -void sqlite3Update(Parse*, SrcList*, ExprList*, Expr*, int); -WhereInfo *sqlite3WhereBegin(Parse*, SrcList*, Expr*, ExprList**); -void sqlite3WhereEnd(WhereInfo*); -void sqlite3ExprCode(Parse*, Expr*); -void sqlite3ExprCodeAndCache(Parse*, Expr*); -int sqlite3ExprCodeExprList(Parse*, ExprList*); -void sqlite3ExprIfTrue(Parse*, Expr*, int, int); -void sqlite3ExprIfFalse(Parse*, Expr*, int, int); -void sqlite3NextedParse(Parse*, const char*, ...); -Table *sqlite3FindTable(sqlite3*,const char*, const char*); -Table *sqlite3LocateTable(Parse*,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*, Token*); -int sqlite3RunVacuum(char**, sqlite3*); -char *sqlite3NameFromToken(Token*); -int sqlite3ExprCheck(Parse*, Expr*, int, int*); -int sqlite3ExprCompare(Expr*, Expr*); -int sqliteFuncId(Token*); -int sqlite3ExprResolveNames(NameContext *, Expr *); -int sqlite3ExprAnalyzeAggregates(NameContext*, Expr*); -Vdbe *sqlite3GetVdbe(Parse*); -void sqlite3Randomness(int, void*); -void sqlite3RollbackAll(sqlite3*); -void sqlite3CodeVerifySchema(Parse*, int); -void sqlite3BeginTransaction(Parse*, int); -void sqlite3CommitTransaction(Parse*); -void sqlite3RollbackTransaction(Parse*); -int sqlite3ExprIsConstant(Expr*); -int sqlite3ExprIsInteger(Expr*, int*); -int sqlite3IsRowid(const char*); -void sqlite3GenerateRowDelete(sqlite3*, Vdbe*, Table*, int, int); -void sqlite3GenerateRowIndexDelete(sqlite3*, Vdbe*, Table*, int, char*); -void sqlite3GenerateIndexKey(Vdbe*, Index*, int); -void sqlite3GenerateConstraintChecks(Parse*,Table*,int,char*,int,int,int,int); -void sqlite3CompleteInsertion(Parse*, Table*, int, char*, int, int, int); -void sqlite3OpenTableAndIndices(Parse*, Table*, int, int); -void sqlite3BeginWriteOperation(Parse*, int, int); -Expr *sqlite3ExprDup(Expr*); -void sqlite3TokenCopy(Token*, Token*); -ExprList *sqlite3ExprListDup(ExprList*); -SrcList *sqlite3SrcListDup(SrcList*); -IdList *sqlite3IdListDup(IdList*); -Select *sqlite3SelectDup(Select*); -FuncDef *sqlite3FindFunction(sqlite3*,const char*,int,int,u8,int); -void sqlite3RegisterBuiltinFunctions(sqlite3*); -void sqlite3RegisterDateTimeFunctions(sqlite3*); -int sqlite3SafetyOn(sqlite3*); -int sqlite3SafetyOff(sqlite3*); -int sqlite3SafetyCheck(sqlite3*); -void sqlite3ChangeCookie(sqlite3*, Vdbe*, int); - -#ifndef SQLITE_OMIT_TRIGGER - void sqlite3BeginTrigger(Parse*, Token*,Token*,int,int,IdList*,SrcList*, - int,Expr*,int); - void sqlite3FinishTrigger(Parse*, TriggerStep*, Token*); - void sqlite3DropTrigger(Parse*, SrcList*); - void sqlite3DropTriggerPtr(Parse*, Trigger*, int); - int sqlite3TriggersExist(Parse*, Table*, int, ExprList*); - int sqlite3CodeRowTrigger(Parse*, int, ExprList*, int, Table *, int, int, - int, int); - void sqliteViewTriggers(Parse*, Table*, Expr*, int, ExprList*); - void sqlite3DeleteTriggerStep(TriggerStep*); - TriggerStep *sqlite3TriggerSelectStep(Select*); - TriggerStep *sqlite3TriggerInsertStep(Token*, IdList*, ExprList*,Select*,int); - TriggerStep *sqlite3TriggerUpdateStep(Token*, ExprList*, Expr*, int); - TriggerStep *sqlite3TriggerDeleteStep(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,C) -# define sqlite3UnlinkAndDeleteTrigger(A,B,C) -# define sqlite3CodeRowTrigger(A,B,C,D,E,F,G,H,I) 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*,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) -# define sqlite3AuthCheck(a,b,c,d,e) SQLITE_OK -# define sqlite3AuthContextPush(a,b,c) -# define sqlite3AuthContextPop(a) ((void)(a)) -#endif -void sqlite3Attach(Parse*, Token*, Token*, int, Token*); -void sqlite3Detach(Parse*, Token*); -int sqlite3BtreeFactory(const sqlite3 *db, const char *zFilename, - int omitJournal, int nCache, 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*); -double sqlite3AtoF(const char *z, const char **); -char *sqlite3_snprintf(int,char*,const char*,...); -int sqlite3GetInt32(const char *, int*); -int sqlite3FitsIn64Bits(const char *); -int sqlite3utf16ByteLen(const void *pData, int nChar); -int sqlite3utf8CharLen(const char *pData, int nByte); -int sqlite3ReadUtf8(const unsigned char *); -int sqlite3PutVarint(unsigned char *, u64); -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(const char *z); -int sqlite3TwoPartName(Parse *, Token *, Token *, Token **); -const char *sqlite3ErrStr(int); -int sqlite3ReadUniChar(const char *zStr, int *pOffset, u8 *pEnc, int fold); -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); -int sqlite3CheckCollSeq(Parse *, CollSeq *); -int sqlite3CheckIndexCollSeq(Parse *, Index *); -int sqlite3CheckObjectName(Parse *, const char *); -void sqlite3VdbeSetChanges(sqlite3 *, int); -void sqlite3utf16Substr(sqlite3_context *,int,sqlite3_value **); - -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_value *sqlite3GetTransientValue(sqlite3*db); -int sqlite3ValueFromExpr(Expr *, u8, u8, sqlite3_value **); -void sqlite3ValueApplyAffinity(sqlite3_value *, u8, u8); -extern const unsigned char sqlite3UpperToLower[]; -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 *); -const char *sqlite3TestErrorName(int); -CollSeq *sqlite3GetCollSeq(sqlite3*, CollSeq *, const char *, int); - -#ifdef SQLITE_SSE -#include "sseInt.h" -#endif - -#endif |