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pragma_c.cs
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executable file
·1887 lines (1805 loc) · 72 KB
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using System;
using System.Diagnostics;
using System.Text;
using i64 = System.Int64;
using u8 = System.Byte;
using Pgno = System.UInt32;
using sqlite3_int64 = System.Int64;
using System.Globalization;
namespace System.Data.SQLite
{
public partial class Sqlite3
{
/*
** 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.
*************************************************************************
** Included in SQLite3 port to C#-SQLite; 2008 Noah B Hart
** C#-SQLite is an independent reimplementation of the SQLite software library
**
** SQLITE_SOURCE_ID: 2011-06-23 19:49:22 4374b7e83ea0a3fbc3691f9c0c936272862f32f2
**
*************************************************************************
*/
//#include "sqliteInt.h"
/*
** 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.
**
** 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(string z)
{
// /* 123456789 123456789 */
string zText = "onoffalseyestruefull";
int[] iOffset = new int[] { 0, 1, 2, 4, 9, 12, 16 };
int[] iLength = new int[] { 2, 2, 3, 5, 3, 4, 4 };
u8[] iValue = new u8[] { 1, 0, 0, 0, 1, 1, 2 };
int i, n;
if (sqlite3Isdigit(z[0]))
{
return (u8)sqlite3Atoi(z);
}
n = sqlite3Strlen30(z);
for (i = 0; i < ArraySize(iLength); i++)
{
if (iLength[i] == n && sqlite3StrNICmp(zText.Substring(iOffset[i]), z, n) == 0)
{
return iValue[i];
}
}
return 1;
}
/*
** Interpret the given string as a boolean value.
*/
static u8 sqlite3GetBoolean(string z)
{
return (u8)(getSafetyLevel(z) & 1);//return getSafetyLevel(z)&1;
}
/* 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 !(SQLITE_OMIT_PRAGMA)
/*
** Interpret the given string as a locking mode value.
*/
static int getLockingMode(string z)
{
if (z != null)
{
if (z.Equals("exclusive", StringComparison.InvariantCultureIgnoreCase))
return PAGER_LOCKINGMODE_EXCLUSIVE;
if (z.Equals("normal", StringComparison.InvariantCultureIgnoreCase))
return PAGER_LOCKINGMODE_NORMAL;
}
return PAGER_LOCKINGMODE_QUERY;
}
#if !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 u8 getAutoVacuum(string z)
{
int i;
if (z.Equals("none", StringComparison.InvariantCultureIgnoreCase))
return BTREE_AUTOVACUUM_NONE;
if (z.Equals("full", StringComparison.InvariantCultureIgnoreCase))
return BTREE_AUTOVACUUM_FULL;
if (z.Equals("incremental", StringComparison.InvariantCultureIgnoreCase))
return BTREE_AUTOVACUUM_INCR;
i = atoi(z);
return (u8)((i >= 0 && i <= 2) ? i : 0);
}
#endif // * if !SQLITE_OMIT_AUTOVACUUM */
#if !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(string z)
{
if (z[0] >= '0' && z[0] <= '2')
{
return z[0] - '0';
}
else if (z.Equals("file", StringComparison.InvariantCultureIgnoreCase))
{
return 1;
}
else if (z.Equals("memory", StringComparison.InvariantCultureIgnoreCase))
{
return 2;
}
else
{
return 0;
}
}
#endif // * SQLITE_PAGER_PRAGMAS */
#if !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 != null)
{
if (0 == db.autoCommit || sqlite3BtreeIsInReadTrans(db.aDb[1].pBt))
{
sqlite3ErrorMsg(pParse, "temporary storage cannot be changed " +
"from within a transaction");
return SQLITE_ERROR;
}
sqlite3BtreeClose(ref db.aDb[1].pBt);
db.aDb[1].pBt = null;
sqlite3ResetInternalSchema(db, -1);
}
return SQLITE_OK;
}
#endif // * SQLITE_PAGER_PRAGMAS */
#if !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, string 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, string 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 );
sqlite3VdbeAddOp4(v, OP_Int64, 0, mem, 0, value, P4_INT64);
sqlite3VdbeSetNumCols(v, 1);
sqlite3VdbeSetColName(v, 0, COLNAME_NAME, zLabel, SQLITE_STATIC);
sqlite3VdbeAddOp2(v, OP_ResultRow, mem, 1);
}
#if !SQLITE_OMIT_FLAG_PRAGMAS
/*
** Check to see if zRight and zLeft refer to a pragma that queries
** or changes one of the flags in db.flags. Return 1 if so and 0 if not.
** Also, implement the pragma.
*/
struct sPragmaType
{
public string zName; /* Name of the pragma */
public int mask; /* Mask for the db.flags value */
public sPragmaType(string zName, int mask)
{
this.zName = zName;
this.mask = mask;
}
}
static int flagPragma(Parse pParse, string zLeft, string zRight)
{
sPragmaType[] aPragma = new sPragmaType[]{
new sPragmaType( "full_column_names", SQLITE_FullColNames ),
new sPragmaType( "short_column_names", SQLITE_ShortColNames ),
new sPragmaType( "count_changes", SQLITE_CountRows ),
new sPragmaType( "empty_result_callbacks", SQLITE_NullCallback ),
new sPragmaType( "legacy_file_format", SQLITE_LegacyFileFmt ),
new sPragmaType( "fullfsync", SQLITE_FullFSync ),
new sPragmaType( "checkpoint_fullfsync", SQLITE_CkptFullFSync ),
new sPragmaType( "reverse_unordered_selects", SQLITE_ReverseOrder),
#if !SQLITE_OMIT_AUTOMATIC_INDEX
new sPragmaType( "automatic_index", SQLITE_AutoIndex ),
#endif
#if SQLITE_DEBUG
new sPragmaType( "sql_trace", SQLITE_SqlTrace ),
new sPragmaType( "vdbe_listing", SQLITE_VdbeListing ),
new sPragmaType( "vdbe_trace", SQLITE_VdbeTrace ),
#endif
#if !SQLITE_OMIT_CHECK
new sPragmaType( "ignore_check_constraints", SQLITE_IgnoreChecks ),
#endif
/* The following is VERY experimental */
new sPragmaType( "writable_schema", SQLITE_WriteSchema|SQLITE_RecoveryMode ),
new sPragmaType( "omit_readlock", SQLITE_NoReadlock ),
/* TODO: Maybe it shouldn't be possible to change the ReadUncommitted
** flag if there are any active statements. */
new sPragmaType( "read_uncommitted", SQLITE_ReadUncommitted ),
new sPragmaType( "recursive_triggers", SQLITE_RecTriggers ),
/* This flag may only be set if both foreign-key and trigger support
** are present in the build. */
#if !(SQLITE_OMIT_FOREIGN_KEY) && !(SQLITE_OMIT_TRIGGER)
new sPragmaType( "foreign_keys", SQLITE_ForeignKeys ),
#endif
};
int i;
sPragmaType p;
for (i = 0; i < ArraySize(aPragma); i++)//, p++)
{
p = aPragma[i];
if (zLeft.Equals(p.zName, StringComparison.InvariantCultureIgnoreCase))
{
sqlite3 db = pParse.db;
Vdbe v;
v = sqlite3GetVdbe(pParse);
Debug.Assert(v != null); /* Already allocated by sqlite3Pragma() */
if (ALWAYS(v))
{
if (null == zRight)
{
returnSingleInt(pParse, p.zName, ((db.flags & p.mask) != 0) ? 1 : 0);
}
else
{
int mask = p.mask; /* Mask of bits to set or clear. */
if (db.autoCommit == 0)
{
/* Foreign key support may not be enabled or disabled while not
** in auto-commit mode. */
mask &= ~(SQLITE_ForeignKeys);
}
if (sqlite3GetBoolean(zRight) != 0)
{
db.flags |= mask;
}
else
{
db.flags &= ~mask;
}
/* Many of the flag-pragmas modify the code generated by the SQL
** compiler (eg. count_changes). So add an opcode to expire all
** compiled SQL statements after modifying a pragma value.
*/
sqlite3VdbeAddOp2(v, OP_Expire, 0, 0);
}
}
return 1;
}
}
return 0;
}
#endif // * SQLITE_OMIT_FLAG_PRAGMAS */
/*
** Return a human-readable name for a constraint resolution action.
*/
#if !SQLITE_OMIT_FOREIGN_KEY
static string actionName(int action)
{
string 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";
Debug.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.
*/
static string sqlite3JournalModename(int eMode)
{
string[] azModeName = {
"delete", "persist", "off", "truncate", "memory"
#if !SQLITE_OMIT_WAL
, "wal"
#endif
};
Debug.Assert(PAGER_JOURNALMODE_DELETE == 0);
Debug.Assert(PAGER_JOURNALMODE_PERSIST == 1);
Debug.Assert(PAGER_JOURNALMODE_OFF == 2);
Debug.Assert(PAGER_JOURNALMODE_TRUNCATE == 3);
Debug.Assert(PAGER_JOURNALMODE_MEMORY == 4);
Debug.Assert(PAGER_JOURNALMODE_WAL == 5);
Debug.Assert(eMode >= 0 && eMode <= ArraySize(azModeName));
if (eMode == ArraySize(azModeName))
return null;
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.
*/
class EncName
{
public string zName;
public u8 enc;
public EncName(string zName, u8 enc)
{
this.zName = zName;
this.enc = enc;
}
};
static EncName[] encnames = new EncName[] {
new EncName( "UTF8", SQLITE_UTF8 ),
new EncName( "UTF-8", SQLITE_UTF8 ),/* Must be element [1] */
new EncName( "UTF-16le (not supported)", SQLITE_UTF16LE ),/* Must be element [2] */
new EncName( "UTF-16be (not supported)", SQLITE_UTF16BE ), /* Must be element [3] */
new EncName( "UTF16le (not supported)", SQLITE_UTF16LE ),
new EncName( "UTF16be (not supported)", SQLITE_UTF16BE ),
new EncName( "UTF-16 (not supported)", 0 ), /* SQLITE_UTF16NATIVE */
new EncName( "UTF16", 0 ), /* SQLITE_UTF16NATIVE */
new EncName( null, 0 )
};
// OVERLOADS, so I don't need to rewrite parse.c
static void sqlite3Pragma(Parse pParse, Token pId1, Token pId2, int null_4, int minusFlag)
{
sqlite3Pragma(pParse, pId1, pId2, null, minusFlag);
}
static 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> */
)
{
string zLeft = null; /* Nul-terminated UTF-8 string <id> */
string zRight = null; /* Nul-terminated UTF-8 string <value>, or NULL */
string zDb = null; /* The database name */
Token pId = new Token();/* Pointer to <id> token */
int iDb; /* Database index for <database> */
sqlite3 db = pParse.db;
Db pDb;
Vdbe v = pParse.pVdbe = sqlite3VdbeCreate(db);
if (v == null)
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, ref 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) != 0)
{
return;
}
zLeft = sqlite3NameFromToken(db, pId);
if (zLeft == "")
return;
if (minusFlag != 0)
{
zRight = (pValue == null) ? "" : sqlite3MPrintf(db, "-%T", pValue);
}
else
{
zRight = sqlite3NameFromToken(db, pValue);
}
Debug.Assert(pId2 != null);
zDb = pId2.n > 0 ? pDb.zName : null;
#if !SQLITE_OMIT_AUTHORIZATION
if ( sqlite3AuthCheck( pParse, SQLITE_PRAGMA, zLeft, zRight, zDb ) )
{
goto pragma_out;
}
#endif
#if !SQLITE_OMIT_PAGER_PRAGMAS
/*
** 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.
*/
if (zLeft.Equals("default_cache_size", StringComparison.InvariantCultureIgnoreCase))
{
VdbeOpList[] getCacheSize = new VdbeOpList[]{
new VdbeOpList( OP_Transaction, 0, 0, 0), /* 0 */
new VdbeOpList( OP_ReadCookie, 0, 1, BTREE_DEFAULT_CACHE_SIZE), /* 1 */
new VdbeOpList( OP_IfPos, 1, 7, 0),
new VdbeOpList( OP_Integer, 0, 2, 0),
new VdbeOpList( OP_Subtract, 1, 2, 1),
new VdbeOpList( OP_IfPos, 1, 7, 0),
new VdbeOpList( OP_Integer, 0, 1, 0), /* 6 */
new VdbeOpList( OP_ResultRow, 1, 1, 0),
};
int addr;
if (sqlite3ReadSchema(pParse) != 0)
goto pragma_out;
sqlite3VdbeUsesBtree(v, iDb);
if (null == zRight)
{
sqlite3VdbeSetNumCols(v, 1);
sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "cache_size", SQLITE_STATIC);
pParse.nMem += 2;
addr = sqlite3VdbeAddOpList(v, getCacheSize.Length, getCacheSize);
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);
Debug.Assert(sqlite3SchemaMutexHeld(db, iDb, null));
pDb.pSchema.cache_size = size;
sqlite3BtreeSetCacheSize(pDb.pBt, pDb.pSchema.cache_size);
}
}
else
/*
** 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.
*/
if (zLeft.Equals("page_size", StringComparison.InvariantCultureIgnoreCase))
{
Btree pBt = pDb.pBt;
Debug.Assert(pBt != null);
if (null == 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;
}
}
}
else
/*
** 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.
*/
if (zLeft.Equals("secure_delete", StringComparison.InvariantCultureIgnoreCase))
{
Btree pBt = pDb.pBt;
int b = -1;
Debug.Assert(pBt != null);
if (zRight != null)
{
b = sqlite3GetBoolean(zRight);
}
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);
}
else
/*
** 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.
**
** PRAGMA [database.]page_count
**
** Return the number of pages in the specified database.
*/
if (zLeft.Equals("page_count", StringComparison.InvariantCultureIgnoreCase)
|| zLeft.Equals("max_page_count", StringComparison.InvariantCultureIgnoreCase)
)
{
int iReg;
if (sqlite3ReadSchema(pParse) != 0)
goto pragma_out;
sqlite3CodeVerifySchema(pParse, iDb);
iReg = ++pParse.nMem;
if (zLeft[0] == 'p')
{
sqlite3VdbeAddOp2(v, OP_Pagecount, iDb, iReg);
}
else
{
sqlite3VdbeAddOp3(v, OP_MaxPgcnt, iDb, iReg, sqlite3Atoi(zRight));
}
sqlite3VdbeAddOp2(v, OP_ResultRow, iReg, 1);
sqlite3VdbeSetNumCols(v, 1);
sqlite3VdbeSetColName(v, 0, COLNAME_NAME, zLeft, SQLITE_TRANSIENT);
}
else
/*
** PRAGMA [database.]page_count
**
** Return the number of pages in the specified database.
*/
if (zLeft == "page_count")
{
Vdbe _v;
int iReg;
_v = sqlite3GetVdbe(pParse);
if (_v == null || sqlite3ReadSchema(pParse) != 0)
goto pragma_out;
sqlite3CodeVerifySchema(pParse, iDb);
iReg = ++pParse.nMem;
sqlite3VdbeAddOp2(_v, OP_Pagecount, iDb, iReg);
sqlite3VdbeAddOp2(_v, OP_ResultRow, iReg, 1);
sqlite3VdbeSetNumCols(_v, 1);
sqlite3VdbeSetColName(_v, 0, COLNAME_NAME, "page_count", SQLITE_STATIC);
}
else
/*
** PRAGMA [database.]locking_mode
** PRAGMA [database.]locking_mode = (normal|exclusive)
*/
if (zLeft.Equals("locking_mode", StringComparison.InvariantCultureIgnoreCase))
{
string 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;
Debug.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) ? 1 : 0;
}
Debug.Assert(eMode == PAGER_LOCKINGMODE_NORMAL || eMode == PAGER_LOCKINGMODE_EXCLUSIVE);
if (eMode == PAGER_LOCKINGMODE_EXCLUSIVE)
{
zRet = "exclusive";
}
sqlite3VdbeSetNumCols(v, 1);
sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "locking_mode", SQLITE_STATIC);
sqlite3VdbeAddOp4(v, OP_String8, 0, 1, 0, zRet, 0);
sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 1);
}
else
/*
** PRAGMA [database.]journal_mode
** PRAGMA [database.]journal_mode =
** (delete|persist|off|truncate|memory|wal|off)
*/
if (zLeft == "journal_mode")
{
int eMode; /* One of the PAGER_JOURNALMODE_XXX symbols */
int ii; /* Loop counter */
/* Force the schema to be loaded on all databases. This cases all
** database files to be opened and the journal_modes set. */
if (sqlite3ReadSchema(pParse) != 0)
{
goto pragma_out;
}
sqlite3VdbeSetNumCols(v, 1);
sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "journal_mode", SQLITE_STATIC);
if (null == zRight)
{
/* If there is no "=MODE" part of the pragma, do a query for the
** current mode */
eMode = PAGER_JOURNALMODE_QUERY;
}
else
{
string zMode;
int n = sqlite3Strlen30(zRight);
for (eMode = 0; (zMode = sqlite3JournalModename(eMode)) != null; eMode++)
{
if (sqlite3StrNICmp(zRight, zMode, n) == 0)
break;
}
if (null == zMode)
{
/* If the "=MODE" part does not match any known journal mode,
** then do a query */
eMode = PAGER_JOURNALMODE_QUERY;
}
}
if (eMode == PAGER_JOURNALMODE_QUERY && pId2.n == 0)
{
/* Convert "PRAGMA journal_mode" into "PRAGMA main.journal_mode" */
iDb = 0;
pId2.n = 1;
}
for (ii = db.nDb - 1; ii >= 0; ii--)
{
if (db.aDb[ii].pBt != null && (ii == iDb || pId2.n == 0))
{
sqlite3VdbeUsesBtree(v, ii);
sqlite3VdbeAddOp3(v, OP_JournalMode, ii, 1, eMode);
}
}
sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 1);
}
else
/*
** PRAGMA [database.]journal_size_limit
** PRAGMA [database.]journal_size_limit=N
**
** Get or set the size limit on rollback journal files.
*/
if (zLeft.Equals("journal_size_limit", StringComparison.InvariantCultureIgnoreCase))
{
Pager pPager = sqlite3BtreePager(pDb.pBt);
i64 iLimit = -2;
if (!String.IsNullOrEmpty(zRight))
{
sqlite3Atoi64(zRight, ref iLimit, 1000000, SQLITE_UTF8);
if (iLimit < -1)
iLimit = -1;
}
iLimit = sqlite3PagerJournalSizeLimit(pPager, iLimit);
returnSingleInt(pParse, "journal_size_limit", iLimit);
}
else
#endif // * SQLITE_OMIT_PAGER_PRAGMAS */
/*
** PRAGMA [database.]auto_vacuum
** PRAGMA [database.]auto_vacuum=N
**
** Get or set the value of the database 'auto-vacuum' parameter.
** The value is one of: 0 NONE 1 FULL 2 INCREMENTAL
*/
#if !SQLITE_OMIT_AUTOVACUUM
if (zLeft.Equals("auto_vacuum", StringComparison.InvariantCultureIgnoreCase))
{
Btree pBt = pDb.pBt;
Debug.Assert(pBt != null);
if (sqlite3ReadSchema(pParse) != 0)
{
goto pragma_out;
}
if (null == zRight)
{
int auto_vacuum;
if (ALWAYS(pBt))
{
auto_vacuum = sqlite3BtreeGetAutoVacuum(pBt);
}
else
{
auto_vacuum = SQLITE_DEFAULT_AUTOVACUUM;
}
returnSingleInt(pParse, "auto_vacuum", auto_vacuum);
}
else
{
int eAuto = getAutoVacuum(zRight);
Debug.Assert(eAuto >= 0 && eAuto <= 2);
db.nextAutovac = (u8)eAuto;
if (ALWAYS(eAuto >= 0))
{
/* Call SetAutoVacuum() to set initialize the internal auto and
** incr-vacuum flags. This is required in case this connection
** creates the database file. It is important that it is created
** as an auto-vacuum capable db.
*/
int rc = sqlite3BtreeSetAutoVacuum(pBt, eAuto);
if (rc == SQLITE_OK && (eAuto == 1 || eAuto == 2))
{
/* When setting the auto_vacuum mode to either "full" or
** "incremental", write the value of meta[6] in the database
** file. Before writing to meta[6], check that meta[3] indicates
** that this really is an auto-vacuum capable database.
*/
VdbeOpList[] setMeta6 = new VdbeOpList[] {
new VdbeOpList( OP_Transaction, 0, 1, 0), /* 0 */
new VdbeOpList( OP_ReadCookie, 0, 1, BTREE_LARGEST_ROOT_PAGE), /* 1 */
new VdbeOpList( OP_If, 1, 0, 0), /* 2 */
new VdbeOpList( OP_Halt, SQLITE_OK, OE_Abort, 0), /* 3 */
new VdbeOpList( OP_Integer, 0, 1, 0), /* 4 */
new VdbeOpList( OP_SetCookie, 0, BTREE_INCR_VACUUM, 1), /* 5 */
};
int iAddr;
iAddr = sqlite3VdbeAddOpList(v, ArraySize(setMeta6), setMeta6);
sqlite3VdbeChangeP1(v, iAddr, iDb);
sqlite3VdbeChangeP1(v, iAddr + 1, iDb);
sqlite3VdbeChangeP2(v, iAddr + 2, iAddr + 4);
sqlite3VdbeChangeP1(v, iAddr + 4, eAuto - 1);
sqlite3VdbeChangeP1(v, iAddr + 5, iDb);
sqlite3VdbeUsesBtree(v, iDb);
}
}
}
}
else
#endif
/*
** PRAGMA [database.]incremental_vacuum(N)
**
** Do N steps of incremental vacuuming on a database.
*/
#if !SQLITE_OMIT_AUTOVACUUM
if (zLeft.Equals("incremental_vacuum", StringComparison.InvariantCultureIgnoreCase))
{
int iLimit = 0, addr;
if (sqlite3ReadSchema(pParse) != 0)
{
goto pragma_out;
}
if (zRight == null || !sqlite3GetInt32(zRight, ref iLimit) || iLimit <= 0)
{
iLimit = 0x7fffffff;
}
sqlite3BeginWriteOperation(pParse, 0, iDb);
sqlite3VdbeAddOp2(v, OP_Integer, iLimit, 1);
addr = sqlite3VdbeAddOp1(v, OP_IncrVacuum, iDb);
sqlite3VdbeAddOp1(v, OP_ResultRow, 1);
sqlite3VdbeAddOp2(v, OP_AddImm, 1, -1);
sqlite3VdbeAddOp2(v, OP_IfPos, 1, addr);
sqlite3VdbeJumpHere(v, addr);
}
else
#endif
#if !SQLITE_OMIT_PAGER_PRAGMAS
/*
** PRAGMA [database.]cache_size
** PRAGMA [database.]cache_size=N
**
** The first form reports the current local setting for the
** page cache size. The local setting can be different from
** the persistent cache size value that is stored in the database
** file itself. The value returned is the maximum number of
** pages in the page cache. The second form sets the local
** page cache size value. It does not change the persistent
** cache size stored on the disk so the cache size will revert
** to its default value when the database is closed and reopened.
** N should be a positive integer.
*/
if (zLeft.Equals("cache_size", StringComparison.InvariantCultureIgnoreCase))
{
if (sqlite3ReadSchema(pParse) != 0)
goto pragma_out;
Debug.Assert(sqlite3SchemaMutexHeld(db, iDb, null));
if (null == zRight)
{
returnSingleInt(pParse, "cache_size", pDb.pSchema.cache_size);
}
else
{
int size = sqlite3AbsInt32(sqlite3Atoi(zRight));
pDb.pSchema.cache_size = size;
sqlite3BtreeSetCacheSize(pDb.pBt, pDb.pSchema.cache_size);
}
}
else
/*
** PRAGMA temp_store
** PRAGMA temp_store = "default"|"memory"|"file"
**
** Return or set the local value of the temp_store flag. Changing
** the local value does not make changes to the disk file and the default
** value will be restored the next time the database is opened.
**
** Note that it is possible for the library compile-time options to
** override this setting
*/
if (zLeft.Equals("temp_store", StringComparison.InvariantCultureIgnoreCase))
{
if (zRight == null)
{
returnSingleInt(pParse, "temp_store", db.temp_store);
}
else
{
changeTempStorage(pParse, zRight);
}
}
else
/*
** PRAGMA temp_store_directory
** PRAGMA temp_store_directory = ""|"directory_name"
**
** Return or set the local value of the temp_store_directory flag. Changing
** the value sets a specific directory to be used for temporary files.
** Setting to a null string reverts to the default temporary directory search.
** If temporary directory is changed, then invalidateTempStorage.
**
*/
if (zLeft.Equals("temp_store_directory", StringComparison.InvariantCultureIgnoreCase))
{
if (null == zRight)
{
if (sqlite3_temp_directory != "")
{
sqlite3VdbeSetNumCols(v, 1);
sqlite3VdbeSetColName(v, 0, COLNAME_NAME,
"temp_store_directory", SQLITE_STATIC);
sqlite3VdbeAddOp4(v, OP_String8, 0, 1, 0, sqlite3_temp_directory, 0);
sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 1);
}
}
else
{
#if !SQLITE_OMIT_WSD
if (zRight.Length > 0)
{
int rc;
int res = 0;
rc = sqlite3OsAccess(db.pVfs, zRight, SQLITE_ACCESS_READWRITE, ref res);
if (rc != SQLITE_OK || res == 0)
{
sqlite3ErrorMsg(pParse, "not a writable directory");
goto pragma_out;
}
}
if (SQLITE_TEMP_STORE == 0
|| (SQLITE_TEMP_STORE == 1 && db.temp_store <= 1)
|| (SQLITE_TEMP_STORE == 2 && db.temp_store == 1)
)
{
invalidateTempStorage(pParse);
}
//sqlite3_free( ref sqlite3_temp_directory );
if (zRight.Length > 0)
{
sqlite3_temp_directory = zRight;//sqlite3_mprintf("%s", zRight);
}
else
{
sqlite3_temp_directory = "";
}
#endif //* SQLITE_OMIT_WSD */
}
}
else
#if !(SQLITE_ENABLE_LOCKING_STYLE)
# if (__APPLE__)
//# define SQLITE_ENABLE_LOCKING_STYLE 1
# else
//# define SQLITE_ENABLE_LOCKING_STYLE 0