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Copy pathpragma.c
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2375 lines (2278 loc) · 82 KB
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/*
** 2003 April 6
**
** 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.
**
*************************************************************************
** This file contains code used to implement the PRAGMA command.
*/
#include "sqliteInt.h"
#if !defined(SQLITE_ENABLE_LOCKING_STYLE)
# if defined(__APPLE__)
# define SQLITE_ENABLE_LOCKING_STYLE 1
# else
# define SQLITE_ENABLE_LOCKING_STYLE 0
# endif
#endif
/***************************************************************************
** The next block of code, including the PragTyp_XXXX macro definitions and
** the aPragmaName[] object is composed of generated code. DO NOT EDIT.
**
** To add new pragmas, edit the code in ../tool/mkpragmatab.tcl and rerun
** that script. Then copy/paste the output in place of the following:
*/
#define PragTyp_HEADER_VALUE 0
#define PragTyp_AUTO_VACUUM 1
#define PragTyp_FLAG 2
#define PragTyp_BUSY_TIMEOUT 3
#define PragTyp_CACHE_SIZE 4
#define PragTyp_CASE_SENSITIVE_LIKE 5
#define PragTyp_COLLATION_LIST 6
#define PragTyp_COMPILE_OPTIONS 7
#define PragTyp_DATA_STORE_DIRECTORY 8
#define PragTyp_DATABASE_LIST 9
#define PragTyp_DEFAULT_CACHE_SIZE 10
#define PragTyp_ENCODING 11
#define PragTyp_FOREIGN_KEY_CHECK 12
#define PragTyp_FOREIGN_KEY_LIST 13
#define PragTyp_INCREMENTAL_VACUUM 14
#define PragTyp_INDEX_INFO 15
#define PragTyp_INDEX_LIST 16
#define PragTyp_INTEGRITY_CHECK 17
#define PragTyp_JOURNAL_MODE 18
#define PragTyp_JOURNAL_SIZE_LIMIT 19
#define PragTyp_LOCK_PROXY_FILE 20
#define PragTyp_LOCKING_MODE 21
#define PragTyp_PAGE_COUNT 22
#define PragTyp_MMAP_SIZE 23
#define PragTyp_PAGE_SIZE 24
#define PragTyp_SECURE_DELETE 25
#define PragTyp_SHRINK_MEMORY 26
#define PragTyp_SOFT_HEAP_LIMIT 27
#define PragTyp_STATS 28
#define PragTyp_SYNCHRONOUS 29
#define PragTyp_TABLE_INFO 30
#define PragTyp_TEMP_STORE 31
#define PragTyp_TEMP_STORE_DIRECTORY 32
#define PragTyp_WAL_AUTOCHECKPOINT 33
#define PragTyp_WAL_CHECKPOINT 34
#define PragTyp_ACTIVATE_EXTENSIONS 35
#define PragTyp_HEXKEY 36
#define PragTyp_KEY 37
#define PragTyp_REKEY 38
#define PragTyp_LOCK_STATUS 39
#define PragTyp_PARSER_TRACE 40
#define PragFlag_NeedSchema 0x01
static const struct sPragmaNames {
const char *const zName; /* Name of pragma */
u8 ePragTyp; /* PragTyp_XXX value */
u8 mPragFlag; /* Zero or more PragFlag_XXX values */
u32 iArg; /* Extra argument */
} aPragmaNames[] = {
#if defined(SQLITE_HAS_CODEC) || defined(SQLITE_ENABLE_CEROD)
{ /* zName: */ "activate_extensions",
/* ePragTyp: */ PragTyp_ACTIVATE_EXTENSIONS,
/* ePragFlag: */ 0,
/* iArg: */ 0 },
#endif
#if !defined(SQLITE_OMIT_SCHEMA_VERSION_PRAGMAS)
{ /* zName: */ "application_id",
/* ePragTyp: */ PragTyp_HEADER_VALUE,
/* ePragFlag: */ 0,
/* iArg: */ 0 },
#endif
#if !defined(SQLITE_OMIT_AUTOVACUUM)
{ /* zName: */ "auto_vacuum",
/* ePragTyp: */ PragTyp_AUTO_VACUUM,
/* ePragFlag: */ PragFlag_NeedSchema,
/* iArg: */ 0 },
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)
#if !defined(SQLITE_OMIT_AUTOMATIC_INDEX)
{ /* zName: */ "automatic_index",
/* ePragTyp: */ PragTyp_FLAG,
/* ePragFlag: */ 0,
/* iArg: */ SQLITE_AutoIndex },
#endif
#endif
{ /* zName: */ "busy_timeout",
/* ePragTyp: */ PragTyp_BUSY_TIMEOUT,
/* ePragFlag: */ 0,
/* iArg: */ 0 },
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS)
{ /* zName: */ "cache_size",
/* ePragTyp: */ PragTyp_CACHE_SIZE,
/* ePragFlag: */ PragFlag_NeedSchema,
/* iArg: */ 0 },
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)
{ /* zName: */ "cache_spill",
/* ePragTyp: */ PragTyp_FLAG,
/* ePragFlag: */ 0,
/* iArg: */ SQLITE_CacheSpill },
#endif
{ /* zName: */ "case_sensitive_like",
/* ePragTyp: */ PragTyp_CASE_SENSITIVE_LIKE,
/* ePragFlag: */ 0,
/* iArg: */ 0 },
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)
{ /* zName: */ "checkpoint_fullfsync",
/* ePragTyp: */ PragTyp_FLAG,
/* ePragFlag: */ 0,
/* iArg: */ SQLITE_CkptFullFSync },
#endif
#if !defined(SQLITE_OMIT_SCHEMA_PRAGMAS)
{ /* zName: */ "collation_list",
/* ePragTyp: */ PragTyp_COLLATION_LIST,
/* ePragFlag: */ 0,
/* iArg: */ 0 },
#endif
#if !defined(SQLITE_OMIT_COMPILEOPTION_DIAGS)
{ /* zName: */ "compile_options",
/* ePragTyp: */ PragTyp_COMPILE_OPTIONS,
/* ePragFlag: */ 0,
/* iArg: */ 0 },
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)
{ /* zName: */ "count_changes",
/* ePragTyp: */ PragTyp_FLAG,
/* ePragFlag: */ 0,
/* iArg: */ SQLITE_CountRows },
#endif
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS) && SQLITE_OS_WIN
{ /* zName: */ "data_store_directory",
/* ePragTyp: */ PragTyp_DATA_STORE_DIRECTORY,
/* ePragFlag: */ 0,
/* iArg: */ 0 },
#endif
#if !defined(SQLITE_OMIT_SCHEMA_PRAGMAS)
{ /* zName: */ "database_list",
/* ePragTyp: */ PragTyp_DATABASE_LIST,
/* ePragFlag: */ PragFlag_NeedSchema,
/* iArg: */ 0 },
#endif
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS) && !defined(SQLITE_OMIT_DEPRECATED)
{ /* zName: */ "default_cache_size",
/* ePragTyp: */ PragTyp_DEFAULT_CACHE_SIZE,
/* ePragFlag: */ PragFlag_NeedSchema,
/* iArg: */ 0 },
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)
#if !defined(SQLITE_OMIT_FOREIGN_KEY) && !defined(SQLITE_OMIT_TRIGGER)
{ /* zName: */ "defer_foreign_keys",
/* ePragTyp: */ PragTyp_FLAG,
/* ePragFlag: */ 0,
/* iArg: */ SQLITE_DeferFKs },
#endif
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)
{ /* zName: */ "empty_result_callbacks",
/* ePragTyp: */ PragTyp_FLAG,
/* ePragFlag: */ 0,
/* iArg: */ SQLITE_NullCallback },
#endif
#if !defined(SQLITE_OMIT_UTF16)
{ /* zName: */ "encoding",
/* ePragTyp: */ PragTyp_ENCODING,
/* ePragFlag: */ 0,
/* iArg: */ 0 },
#endif
#if !defined(SQLITE_OMIT_FOREIGN_KEY) && !defined(SQLITE_OMIT_TRIGGER)
{ /* zName: */ "foreign_key_check",
/* ePragTyp: */ PragTyp_FOREIGN_KEY_CHECK,
/* ePragFlag: */ PragFlag_NeedSchema,
/* iArg: */ 0 },
#endif
#if !defined(SQLITE_OMIT_FOREIGN_KEY)
{ /* zName: */ "foreign_key_list",
/* ePragTyp: */ PragTyp_FOREIGN_KEY_LIST,
/* ePragFlag: */ PragFlag_NeedSchema,
/* iArg: */ 0 },
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)
#if !defined(SQLITE_OMIT_FOREIGN_KEY) && !defined(SQLITE_OMIT_TRIGGER)
{ /* zName: */ "foreign_keys",
/* ePragTyp: */ PragTyp_FLAG,
/* ePragFlag: */ 0,
/* iArg: */ SQLITE_ForeignKeys },
#endif
#endif
#if !defined(SQLITE_OMIT_SCHEMA_VERSION_PRAGMAS)
{ /* zName: */ "freelist_count",
/* ePragTyp: */ PragTyp_HEADER_VALUE,
/* ePragFlag: */ 0,
/* iArg: */ 0 },
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)
{ /* zName: */ "full_column_names",
/* ePragTyp: */ PragTyp_FLAG,
/* ePragFlag: */ 0,
/* iArg: */ SQLITE_FullColNames },
{ /* zName: */ "fullfsync",
/* ePragTyp: */ PragTyp_FLAG,
/* ePragFlag: */ 0,
/* iArg: */ SQLITE_FullFSync },
#endif
#if defined(SQLITE_HAS_CODEC)
{ /* zName: */ "hexkey",
/* ePragTyp: */ PragTyp_HEXKEY,
/* ePragFlag: */ 0,
/* iArg: */ 0 },
{ /* zName: */ "hexrekey",
/* ePragTyp: */ PragTyp_HEXKEY,
/* ePragFlag: */ 0,
/* iArg: */ 0 },
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)
#if !defined(SQLITE_OMIT_CHECK)
{ /* zName: */ "ignore_check_constraints",
/* ePragTyp: */ PragTyp_FLAG,
/* ePragFlag: */ 0,
/* iArg: */ SQLITE_IgnoreChecks },
#endif
#endif
#if !defined(SQLITE_OMIT_AUTOVACUUM)
{ /* zName: */ "incremental_vacuum",
/* ePragTyp: */ PragTyp_INCREMENTAL_VACUUM,
/* ePragFlag: */ PragFlag_NeedSchema,
/* iArg: */ 0 },
#endif
#if !defined(SQLITE_OMIT_SCHEMA_PRAGMAS)
{ /* zName: */ "index_info",
/* ePragTyp: */ PragTyp_INDEX_INFO,
/* ePragFlag: */ PragFlag_NeedSchema,
/* iArg: */ 0 },
{ /* zName: */ "index_list",
/* ePragTyp: */ PragTyp_INDEX_LIST,
/* ePragFlag: */ PragFlag_NeedSchema,
/* iArg: */ 0 },
#endif
#if !defined(SQLITE_OMIT_INTEGRITY_CHECK)
{ /* zName: */ "integrity_check",
/* ePragTyp: */ PragTyp_INTEGRITY_CHECK,
/* ePragFlag: */ PragFlag_NeedSchema,
/* iArg: */ 0 },
#endif
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS)
{ /* zName: */ "journal_mode",
/* ePragTyp: */ PragTyp_JOURNAL_MODE,
/* ePragFlag: */ PragFlag_NeedSchema,
/* iArg: */ 0 },
{ /* zName: */ "journal_size_limit",
/* ePragTyp: */ PragTyp_JOURNAL_SIZE_LIMIT,
/* ePragFlag: */ 0,
/* iArg: */ 0 },
#endif
#if defined(SQLITE_HAS_CODEC)
{ /* zName: */ "key",
/* ePragTyp: */ PragTyp_KEY,
/* ePragFlag: */ 0,
/* iArg: */ 0 },
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)
{ /* zName: */ "legacy_file_format",
/* ePragTyp: */ PragTyp_FLAG,
/* ePragFlag: */ 0,
/* iArg: */ SQLITE_LegacyFileFmt },
#endif
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS) && SQLITE_ENABLE_LOCKING_STYLE
{ /* zName: */ "lock_proxy_file",
/* ePragTyp: */ PragTyp_LOCK_PROXY_FILE,
/* ePragFlag: */ 0,
/* iArg: */ 0 },
#endif
#if defined(SQLITE_DEBUG) || defined(SQLITE_TEST)
{ /* zName: */ "lock_status",
/* ePragTyp: */ PragTyp_LOCK_STATUS,
/* ePragFlag: */ 0,
/* iArg: */ 0 },
#endif
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS)
{ /* zName: */ "locking_mode",
/* ePragTyp: */ PragTyp_LOCKING_MODE,
/* ePragFlag: */ 0,
/* iArg: */ 0 },
{ /* zName: */ "max_page_count",
/* ePragTyp: */ PragTyp_PAGE_COUNT,
/* ePragFlag: */ PragFlag_NeedSchema,
/* iArg: */ 0 },
{ /* zName: */ "mmap_size",
/* ePragTyp: */ PragTyp_MMAP_SIZE,
/* ePragFlag: */ 0,
/* iArg: */ 0 },
{ /* zName: */ "page_count",
/* ePragTyp: */ PragTyp_PAGE_COUNT,
/* ePragFlag: */ PragFlag_NeedSchema,
/* iArg: */ 0 },
{ /* zName: */ "page_size",
/* ePragTyp: */ PragTyp_PAGE_SIZE,
/* ePragFlag: */ 0,
/* iArg: */ 0 },
#endif
#if defined(SQLITE_DEBUG)
{ /* zName: */ "parser_trace",
/* ePragTyp: */ PragTyp_PARSER_TRACE,
/* ePragFlag: */ 0,
/* iArg: */ 0 },
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)
{ /* zName: */ "query_only",
/* ePragTyp: */ PragTyp_FLAG,
/* ePragFlag: */ 0,
/* iArg: */ SQLITE_QueryOnly },
#endif
#if !defined(SQLITE_OMIT_INTEGRITY_CHECK)
{ /* zName: */ "quick_check",
/* ePragTyp: */ PragTyp_INTEGRITY_CHECK,
/* ePragFlag: */ PragFlag_NeedSchema,
/* iArg: */ 0 },
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)
{ /* zName: */ "read_uncommitted",
/* ePragTyp: */ PragTyp_FLAG,
/* ePragFlag: */ 0,
/* iArg: */ SQLITE_ReadUncommitted },
{ /* zName: */ "recursive_triggers",
/* ePragTyp: */ PragTyp_FLAG,
/* ePragFlag: */ 0,
/* iArg: */ SQLITE_RecTriggers },
#endif
#if defined(SQLITE_HAS_CODEC)
{ /* zName: */ "rekey",
/* ePragTyp: */ PragTyp_REKEY,
/* ePragFlag: */ 0,
/* iArg: */ 0 },
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)
{ /* zName: */ "reverse_unordered_selects",
/* ePragTyp: */ PragTyp_FLAG,
/* ePragFlag: */ 0,
/* iArg: */ SQLITE_ReverseOrder },
#endif
#if !defined(SQLITE_OMIT_SCHEMA_VERSION_PRAGMAS)
{ /* zName: */ "schema_version",
/* ePragTyp: */ PragTyp_HEADER_VALUE,
/* ePragFlag: */ 0,
/* iArg: */ 0 },
#endif
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS)
{ /* zName: */ "secure_delete",
/* ePragTyp: */ PragTyp_SECURE_DELETE,
/* ePragFlag: */ 0,
/* iArg: */ 0 },
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)
{ /* zName: */ "short_column_names",
/* ePragTyp: */ PragTyp_FLAG,
/* ePragFlag: */ 0,
/* iArg: */ SQLITE_ShortColNames },
#endif
{ /* zName: */ "shrink_memory",
/* ePragTyp: */ PragTyp_SHRINK_MEMORY,
/* ePragFlag: */ 0,
/* iArg: */ 0 },
{ /* zName: */ "soft_heap_limit",
/* ePragTyp: */ PragTyp_SOFT_HEAP_LIMIT,
/* ePragFlag: */ 0,
/* iArg: */ 0 },
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)
#if defined(SQLITE_DEBUG)
{ /* zName: */ "sql_trace",
/* ePragTyp: */ PragTyp_FLAG,
/* ePragFlag: */ 0,
/* iArg: */ SQLITE_SqlTrace },
#endif
#endif
#if !defined(SQLITE_OMIT_SCHEMA_PRAGMAS)
{ /* zName: */ "stats",
/* ePragTyp: */ PragTyp_STATS,
/* ePragFlag: */ PragFlag_NeedSchema,
/* iArg: */ 0 },
#endif
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS)
{ /* zName: */ "synchronous",
/* ePragTyp: */ PragTyp_SYNCHRONOUS,
/* ePragFlag: */ PragFlag_NeedSchema,
/* iArg: */ 0 },
#endif
#if !defined(SQLITE_OMIT_SCHEMA_PRAGMAS)
{ /* zName: */ "table_info",
/* ePragTyp: */ PragTyp_TABLE_INFO,
/* ePragFlag: */ PragFlag_NeedSchema,
/* iArg: */ 0 },
#endif
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS)
{ /* zName: */ "temp_store",
/* ePragTyp: */ PragTyp_TEMP_STORE,
/* ePragFlag: */ 0,
/* iArg: */ 0 },
{ /* zName: */ "temp_store_directory",
/* ePragTyp: */ PragTyp_TEMP_STORE_DIRECTORY,
/* ePragFlag: */ 0,
/* iArg: */ 0 },
#endif
#if !defined(SQLITE_OMIT_SCHEMA_VERSION_PRAGMAS)
{ /* zName: */ "user_version",
/* ePragTyp: */ PragTyp_HEADER_VALUE,
/* ePragFlag: */ 0,
/* iArg: */ 0 },
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)
#if defined(SQLITE_DEBUG)
{ /* zName: */ "vdbe_addoptrace",
/* ePragTyp: */ PragTyp_FLAG,
/* ePragFlag: */ 0,
/* iArg: */ SQLITE_VdbeAddopTrace },
{ /* zName: */ "vdbe_debug",
/* ePragTyp: */ PragTyp_FLAG,
/* ePragFlag: */ 0,
/* iArg: */ SQLITE_SqlTrace|SQLITE_VdbeListing|SQLITE_VdbeTrace },
{ /* zName: */ "vdbe_eqp",
/* ePragTyp: */ PragTyp_FLAG,
/* ePragFlag: */ 0,
/* iArg: */ SQLITE_VdbeEQP },
{ /* zName: */ "vdbe_listing",
/* ePragTyp: */ PragTyp_FLAG,
/* ePragFlag: */ 0,
/* iArg: */ SQLITE_VdbeListing },
{ /* zName: */ "vdbe_trace",
/* ePragTyp: */ PragTyp_FLAG,
/* ePragFlag: */ 0,
/* iArg: */ SQLITE_VdbeTrace },
#endif
#endif
#if !defined(SQLITE_OMIT_WAL)
{ /* zName: */ "wal_autocheckpoint",
/* ePragTyp: */ PragTyp_WAL_AUTOCHECKPOINT,
/* ePragFlag: */ 0,
/* iArg: */ 0 },
{ /* zName: */ "wal_checkpoint",
/* ePragTyp: */ PragTyp_WAL_CHECKPOINT,
/* ePragFlag: */ PragFlag_NeedSchema,
/* iArg: */ 0 },
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)
{ /* zName: */ "writable_schema",
/* ePragTyp: */ PragTyp_FLAG,
/* ePragFlag: */ 0,
/* iArg: */ SQLITE_WriteSchema|SQLITE_RecoveryMode },
#endif
};
/* Number of pragmas: 56 on by default, 69 total. */
/* End of the automatically generated pragma table.
***************************************************************************/
/*
** Interpret the given string as a safety level. Return 0 for OFF,
** 1 for ON or NORMAL and 2 for FULL. Return 1 for an empty or
** unrecognized string argument. The FULL option is disallowed
** if the omitFull parameter it 1.
**
** Note that the values returned are one less that the values that
** should be passed into sqlite3BtreeSetSafetyLevel(). The is done
** to support legacy SQL code. The safety level used to be boolean
** and older scripts may have used numbers 0 for OFF and 1 for ON.
*/
static u8 getSafetyLevel(const char *z, int omitFull, u8 dflt){
/* 123456789 123456789 */
static const char zText[] = "onoffalseyestruefull";
static const u8 iOffset[] = {0, 1, 2, 4, 9, 12, 16};
static const u8 iLength[] = {2, 2, 3, 5, 3, 4, 4};
static const u8 iValue[] = {1, 0, 0, 0, 1, 1, 2};
int i, n;
if( sqlite3Isdigit(*z) ){
return (u8)sqlite3Atoi(z);
}
n = sqlite3Strlen30(z);
for(i=0; i<ArraySize(iLength)-omitFull; i++){
if( iLength[i]==n && sqlite3StrNICmp(&zText[iOffset[i]],z,n)==0 ){
return iValue[i];
}
}
return dflt;
}
/*
** Interpret the given string as a boolean value.
*/
u8 sqlite3GetBoolean(const char *z, u8 dflt){
return getSafetyLevel(z,1,dflt)!=0;
}
/* The sqlite3GetBoolean() function is used by other modules but the
** remainder of this file is specific to PRAGMA processing. So omit
** the rest of the file if PRAGMAs are omitted from the build.
*/
#if !defined(SQLITE_OMIT_PRAGMA)
/*
** Interpret the given string as a locking mode value.
*/
static int getLockingMode(const char *z){
if( z ){
if( 0==sqlite3StrICmp(z, "exclusive") ) return PAGER_LOCKINGMODE_EXCLUSIVE;
if( 0==sqlite3StrICmp(z, "normal") ) return PAGER_LOCKINGMODE_NORMAL;
}
return PAGER_LOCKINGMODE_QUERY;
}
#ifndef SQLITE_OMIT_AUTOVACUUM
/*
** Interpret the given string as an auto-vacuum mode value.
**
** The following strings, "none", "full" and "incremental" are
** acceptable, as are their numeric equivalents: 0, 1 and 2 respectively.
*/
static int getAutoVacuum(const char *z){
int i;
if( 0==sqlite3StrICmp(z, "none") ) return BTREE_AUTOVACUUM_NONE;
if( 0==sqlite3StrICmp(z, "full") ) return BTREE_AUTOVACUUM_FULL;
if( 0==sqlite3StrICmp(z, "incremental") ) return BTREE_AUTOVACUUM_INCR;
i = sqlite3Atoi(z);
return (u8)((i>=0&&i<=2)?i:0);
}
#endif /* ifndef SQLITE_OMIT_AUTOVACUUM */
#ifndef SQLITE_OMIT_PAGER_PRAGMAS
/*
** Interpret the given string as a temp db location. Return 1 for file
** backed temporary databases, 2 for the Red-Black tree in memory database
** and 0 to use the compile-time default.
*/
static int getTempStore(const char *z){
if( z[0]>='0' && z[0]<='2' ){
return z[0] - '0';
}else if( sqlite3StrICmp(z, "file")==0 ){
return 1;
}else if( sqlite3StrICmp(z, "memory")==0 ){
return 2;
}else{
return 0;
}
}
#endif /* SQLITE_PAGER_PRAGMAS */
#ifndef SQLITE_OMIT_PAGER_PRAGMAS
/*
** Invalidate temp storage, either when the temp storage is changed
** from default, or when 'file' and the temp_store_directory has changed
*/
static int invalidateTempStorage(Parse *pParse){
sqlite3 *db = pParse->db;
if( db->aDb[1].pBt!=0 ){
if( !db->autoCommit || sqlite3BtreeIsInReadTrans(db->aDb[1].pBt) ){
sqlite3ErrorMsg(pParse, "temporary storage cannot be changed "
"from within a transaction");
return SQLITE_ERROR;
}
sqlite3BtreeClose(db->aDb[1].pBt);
db->aDb[1].pBt = 0;
sqlite3ResetAllSchemasOfConnection(db);
}
return SQLITE_OK;
}
#endif /* SQLITE_PAGER_PRAGMAS */
#ifndef SQLITE_OMIT_PAGER_PRAGMAS
/*
** If the TEMP database is open, close it and mark the database schema
** as needing reloading. This must be done when using the SQLITE_TEMP_STORE
** or DEFAULT_TEMP_STORE pragmas.
*/
static int changeTempStorage(Parse *pParse, const char *zStorageType){
int ts = getTempStore(zStorageType);
sqlite3 *db = pParse->db;
if( db->temp_store==ts ) return SQLITE_OK;
if( invalidateTempStorage( pParse ) != SQLITE_OK ){
return SQLITE_ERROR;
}
db->temp_store = (u8)ts;
return SQLITE_OK;
}
#endif /* SQLITE_PAGER_PRAGMAS */
/*
** Generate code to return a single integer value.
*/
static void returnSingleInt(Parse *pParse, const char *zLabel, i64 value){
Vdbe *v = sqlite3GetVdbe(pParse);
int mem = ++pParse->nMem;
i64 *pI64 = sqlite3DbMallocRaw(pParse->db, sizeof(value));
if( pI64 ){
memcpy(pI64, &value, sizeof(value));
}
sqlite3VdbeAddOp4(v, OP_Int64, 0, mem, 0, (char*)pI64, P4_INT64);
sqlite3VdbeSetNumCols(v, 1);
sqlite3VdbeSetColName(v, 0, COLNAME_NAME, zLabel, SQLITE_STATIC);
sqlite3VdbeAddOp2(v, OP_ResultRow, mem, 1);
}
/*
** Set the safety_level and pager flags for pager iDb. Or if iDb<0
** set these values for all pagers.
*/
#ifndef SQLITE_OMIT_PAGER_PRAGMAS
static void setAllPagerFlags(sqlite3 *db){
if( db->autoCommit ){
Db *pDb = db->aDb;
int n = db->nDb;
assert( SQLITE_FullFSync==PAGER_FULLFSYNC );
assert( SQLITE_CkptFullFSync==PAGER_CKPT_FULLFSYNC );
assert( SQLITE_CacheSpill==PAGER_CACHESPILL );
assert( (PAGER_FULLFSYNC | PAGER_CKPT_FULLFSYNC | PAGER_CACHESPILL)
== PAGER_FLAGS_MASK );
assert( (pDb->safety_level & PAGER_SYNCHRONOUS_MASK)==pDb->safety_level );
while( (n--) > 0 ){
if( pDb->pBt ){
sqlite3BtreeSetPagerFlags(pDb->pBt,
pDb->safety_level | (db->flags & PAGER_FLAGS_MASK) );
}
pDb++;
}
}
}
#else
# define setAllPagerFlags(X) /* no-op */
#endif
/*
** Return a human-readable name for a constraint resolution action.
*/
#ifndef SQLITE_OMIT_FOREIGN_KEY
static const char *actionName(u8 action){
const char *zName;
switch( action ){
case OE_SetNull: zName = "SET NULL"; break;
case OE_SetDflt: zName = "SET DEFAULT"; break;
case OE_Cascade: zName = "CASCADE"; break;
case OE_Restrict: zName = "RESTRICT"; break;
default: zName = "NO ACTION";
assert( action==OE_None ); break;
}
return zName;
}
#endif
/*
** Parameter eMode must be one of the PAGER_JOURNALMODE_XXX constants
** defined in pager.h. This function returns the associated lowercase
** journal-mode name.
*/
const char *sqlite3JournalModename(int eMode){
static char * const azModeName[] = {
"delete", "persist", "off", "truncate", "memory"
#ifndef SQLITE_OMIT_WAL
, "wal"
#endif
};
assert( PAGER_JOURNALMODE_DELETE==0 );
assert( PAGER_JOURNALMODE_PERSIST==1 );
assert( PAGER_JOURNALMODE_OFF==2 );
assert( PAGER_JOURNALMODE_TRUNCATE==3 );
assert( PAGER_JOURNALMODE_MEMORY==4 );
assert( PAGER_JOURNALMODE_WAL==5 );
assert( eMode>=0 && eMode<=ArraySize(azModeName) );
if( eMode==ArraySize(azModeName) ) return 0;
return azModeName[eMode];
}
/*
** Process a pragma statement.
**
** Pragmas are of this form:
**
** PRAGMA [database.]id [= value]
**
** The identifier might also be a string. The value is a string, and
** identifier, or a number. If minusFlag is true, then the value is
** a number that was preceded by a minus sign.
**
** If the left side is "database.id" then pId1 is the database name
** and pId2 is the id. If the left side is just "id" then pId1 is the
** id and pId2 is any empty string.
*/
void sqlite3Pragma(
Parse *pParse,
Token *pId1, /* First part of [database.]id field */
Token *pId2, /* Second part of [database.]id field, or NULL */
Token *pValue, /* Token for <value>, or NULL */
int minusFlag /* True if a '-' sign preceded <value> */
){
char *zLeft = 0; /* Nul-terminated UTF-8 string <id> */
char *zRight = 0; /* Nul-terminated UTF-8 string <value>, or NULL */
const char *zDb = 0; /* The database name */
Token *pId; /* Pointer to <id> token */
char *aFcntl[4]; /* Argument to SQLITE_FCNTL_PRAGMA */
int iDb; /* Database index for <database> */
int lwr, upr, mid; /* Binary search bounds */
int rc; /* return value form SQLITE_FCNTL_PRAGMA */
sqlite3 *db = pParse->db; /* The database connection */
Db *pDb; /* The specific database being pragmaed */
Vdbe *v = sqlite3GetVdbe(pParse); /* Prepared statement */
/* BEGIN SQLCIPHER */
#ifdef SQLITE_HAS_CODEC
extern int sqlcipher_codec_pragma(sqlite3*, int, Parse *, const char *, const char *);
#endif
/* END SQLCIPHER */
if( v==0 ) return;
sqlite3VdbeRunOnlyOnce(v);
pParse->nMem = 2;
/* Interpret the [database.] part of the pragma statement. iDb is the
** index of the database this pragma is being applied to in db.aDb[]. */
iDb = sqlite3TwoPartName(pParse, pId1, pId2, &pId);
if( iDb<0 ) return;
pDb = &db->aDb[iDb];
/* If the temp database has been explicitly named as part of the
** pragma, make sure it is open.
*/
if( iDb==1 && sqlite3OpenTempDatabase(pParse) ){
return;
}
zLeft = sqlite3NameFromToken(db, pId);
if( !zLeft ) return;
if( minusFlag ){
zRight = sqlite3MPrintf(db, "-%T", pValue);
}else{
zRight = sqlite3NameFromToken(db, pValue);
}
assert( pId2 );
zDb = pId2->n>0 ? pDb->zName : 0;
if( sqlite3AuthCheck(pParse, SQLITE_PRAGMA, zLeft, zRight, zDb) ){
goto pragma_out;
}
/* Send an SQLITE_FCNTL_PRAGMA file-control to the underlying VFS
** connection. If it returns SQLITE_OK, then assume that the VFS
** handled the pragma and generate a no-op prepared statement.
*/
aFcntl[0] = 0;
aFcntl[1] = zLeft;
aFcntl[2] = zRight;
aFcntl[3] = 0;
db->busyHandler.nBusy = 0;
rc = sqlite3_file_control(db, zDb, SQLITE_FCNTL_PRAGMA, (void*)aFcntl);
if( rc==SQLITE_OK ){
if( aFcntl[0] ){
int mem = ++pParse->nMem;
sqlite3VdbeAddOp4(v, OP_String8, 0, mem, 0, aFcntl[0], 0);
sqlite3VdbeSetNumCols(v, 1);
sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "result", SQLITE_STATIC);
sqlite3VdbeAddOp2(v, OP_ResultRow, mem, 1);
sqlite3_free(aFcntl[0]);
}
goto pragma_out;
}
if( rc!=SQLITE_NOTFOUND ){
if( aFcntl[0] ){
sqlite3ErrorMsg(pParse, "%s", aFcntl[0]);
sqlite3_free(aFcntl[0]);
}
pParse->nErr++;
pParse->rc = rc;
goto pragma_out;
}
/* BEGIN SQLCIPHER */
#ifdef SQLITE_HAS_CODEC
if(sqlcipher_codec_pragma(db, iDb, pParse, zLeft, zRight)) {
/* sqlcipher_codec_pragma executes internal */
goto pragma_out;
}
#endif
/* END SQLCIPHER */
/* Locate the pragma in the lookup table */
lwr = 0;
upr = ArraySize(aPragmaNames)-1;
while( lwr<=upr ){
mid = (lwr+upr)/2;
rc = sqlite3_stricmp(zLeft, aPragmaNames[mid].zName);
if( rc==0 ) break;
if( rc<0 ){
upr = mid - 1;
}else{
lwr = mid + 1;
}
}
if( lwr>upr ) goto pragma_out;
/* Make sure the database schema is loaded if the pragma requires that */
if( (aPragmaNames[mid].mPragFlag & PragFlag_NeedSchema)!=0 ){
if( sqlite3ReadSchema(pParse) ) goto pragma_out;
}
/* Jump to the appropriate pragma handler */
switch( aPragmaNames[mid].ePragTyp ){
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS) && !defined(SQLITE_OMIT_DEPRECATED)
/*
** PRAGMA [database.]default_cache_size
** PRAGMA [database.]default_cache_size=N
**
** The first form reports the current persistent setting for the
** page cache size. The value returned is the maximum number of
** pages in the page cache. The second form sets both the current
** page cache size value and the persistent page cache size value
** stored in the database file.
**
** Older versions of SQLite would set the default cache size to a
** negative number to indicate synchronous=OFF. These days, synchronous
** is always on by default regardless of the sign of the default cache
** size. But continue to take the absolute value of the default cache
** size of historical compatibility.
*/
case PragTyp_DEFAULT_CACHE_SIZE: {
static const int iLn = VDBE_OFFSET_LINENO(2);
static const VdbeOpList getCacheSize[] = {
{ OP_Transaction, 0, 0, 0}, /* 0 */
{ OP_ReadCookie, 0, 1, BTREE_DEFAULT_CACHE_SIZE}, /* 1 */
{ OP_IfPos, 1, 8, 0},
{ OP_Integer, 0, 2, 0},
{ OP_Subtract, 1, 2, 1},
{ OP_IfPos, 1, 8, 0},
{ OP_Integer, 0, 1, 0}, /* 6 */
{ OP_Noop, 0, 0, 0},
{ OP_ResultRow, 1, 1, 0},
};
int addr;
sqlite3VdbeUsesBtree(v, iDb);
if( !zRight ){
sqlite3VdbeSetNumCols(v, 1);
sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "cache_size", SQLITE_STATIC);
pParse->nMem += 2;
addr = sqlite3VdbeAddOpList(v, ArraySize(getCacheSize), getCacheSize,iLn);
sqlite3VdbeChangeP1(v, addr, iDb);
sqlite3VdbeChangeP1(v, addr+1, iDb);
sqlite3VdbeChangeP1(v, addr+6, SQLITE_DEFAULT_CACHE_SIZE);
}else{
int size = sqlite3AbsInt32(sqlite3Atoi(zRight));
sqlite3BeginWriteOperation(pParse, 0, iDb);
sqlite3VdbeAddOp2(v, OP_Integer, size, 1);
sqlite3VdbeAddOp3(v, OP_SetCookie, iDb, BTREE_DEFAULT_CACHE_SIZE, 1);
assert( sqlite3SchemaMutexHeld(db, iDb, 0) );
pDb->pSchema->cache_size = size;
sqlite3BtreeSetCacheSize(pDb->pBt, pDb->pSchema->cache_size);
}
break;
}
#endif /* !SQLITE_OMIT_PAGER_PRAGMAS && !SQLITE_OMIT_DEPRECATED */
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS)
/*
** PRAGMA [database.]page_size
** PRAGMA [database.]page_size=N
**
** The first form reports the current setting for the
** database page size in bytes. The second form sets the
** database page size value. The value can only be set if
** the database has not yet been created.
*/
case PragTyp_PAGE_SIZE: {
Btree *pBt = pDb->pBt;
assert( pBt!=0 );
if( !zRight ){
int size = ALWAYS(pBt) ? sqlite3BtreeGetPageSize(pBt) : 0;
returnSingleInt(pParse, "page_size", size);
}else{
/* Malloc may fail when setting the page-size, as there is an internal
** buffer that the pager module resizes using sqlite3_realloc().
*/
db->nextPagesize = sqlite3Atoi(zRight);
if( SQLITE_NOMEM==sqlite3BtreeSetPageSize(pBt, db->nextPagesize,-1,0) ){
db->mallocFailed = 1;
}
}
break;
}
/*
** PRAGMA [database.]secure_delete
** PRAGMA [database.]secure_delete=ON/OFF
**
** The first form reports the current setting for the
** secure_delete flag. The second form changes the secure_delete
** flag setting and reports thenew value.
*/
case PragTyp_SECURE_DELETE: {
Btree *pBt = pDb->pBt;
int b = -1;
assert( pBt!=0 );
if( zRight ){
b = sqlite3GetBoolean(zRight, 0);
}
if( pId2->n==0 && b>=0 ){
int ii;
for(ii=0; ii<db->nDb; ii++){
sqlite3BtreeSecureDelete(db->aDb[ii].pBt, b);
}
}
b = sqlite3BtreeSecureDelete(pBt, b);
returnSingleInt(pParse, "secure_delete", b);
break;
}
/*
** PRAGMA [database.]max_page_count
** PRAGMA [database.]max_page_count=N
**
** The first form reports the current setting for the
** maximum number of pages in the database file. The
** second form attempts to change this setting. Both
** forms return the current setting.
**
** The absolute value of N is used. This is undocumented and might
** change. The only purpose is to provide an easy way to test
** the sqlite3AbsInt32() function.
**
** PRAGMA [database.]page_count
**
** Return the number of pages in the specified database.
*/
case PragTyp_PAGE_COUNT: {
int iReg;
sqlite3CodeVerifySchema(pParse, iDb);
iReg = ++pParse->nMem;
if( sqlite3Tolower(zLeft[0])=='p' ){
sqlite3VdbeAddOp2(v, OP_Pagecount, iDb, iReg);
}else{
sqlite3VdbeAddOp3(v, OP_MaxPgcnt, iDb, iReg,
sqlite3AbsInt32(sqlite3Atoi(zRight)));
}
sqlite3VdbeAddOp2(v, OP_ResultRow, iReg, 1);
sqlite3VdbeSetNumCols(v, 1);
sqlite3VdbeSetColName(v, 0, COLNAME_NAME, zLeft, SQLITE_TRANSIENT);
break;
}
/*
** PRAGMA [database.]locking_mode
** PRAGMA [database.]locking_mode = (normal|exclusive)
*/
case PragTyp_LOCKING_MODE: {
const char *zRet = "normal";
int eMode = getLockingMode(zRight);
if( pId2->n==0 && eMode==PAGER_LOCKINGMODE_QUERY ){
/* Simple "PRAGMA locking_mode;" statement. This is a query for
** the current default locking mode (which may be different to
** the locking-mode of the main database).
*/
eMode = db->dfltLockMode;
}else{
Pager *pPager;
if( pId2->n==0 ){
/* This indicates that no database name was specified as part
** of the PRAGMA command. In this case the locking-mode must be
** set on all attached databases, as well as the main db file.
**
** Also, the sqlite3.dfltLockMode variable is set so that
** any subsequently attached databases also use the specified
** locking mode.
*/
int ii;
assert(pDb==&db->aDb[0]);
for(ii=2; ii<db->nDb; ii++){
pPager = sqlite3BtreePager(db->aDb[ii].pBt);
sqlite3PagerLockingMode(pPager, eMode);
}
db->dfltLockMode = (u8)eMode;
}
pPager = sqlite3BtreePager(pDb->pBt);
eMode = sqlite3PagerLockingMode(pPager, eMode);
}