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Add the cache_spill pragma.

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FossilOrigin-Name: cdb181c04fa99c6c29f23eb68ccb5475e7f6bf9c
This commit is contained in:
drh
2013-08-16 20:42:20 +00:00
parent 0af16ab2c2
commit 40c3941cfa
9 changed files with 120 additions and 80 deletions
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27
manifest
View File

@@ -1,5 +1,5 @@
C Make\ssure\sthat\sGROUP\sBY\sterms\sselect\sinput\scolumn\snames\sin\spreference\sto\noutput\scolumn\snames,\sin\scompliance\swith\sthe\sSQL\sstandard.\nTicket\s[1c69be2dafc28].
D 2013-08-15T22:40:21.803
C Add\sthe\scache_spill\spragma.
D 2013-08-16T20:42:20.550
F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
F Makefile.in 5e41da95d92656a5004b03d3576e8b226858a28e
F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@@ -163,8 +163,8 @@ F src/auth.c 523da7fb4979469955d822ff9298352d6b31de34
F src/backup.c 43b348822db3e4cef48b2ae5a445fbeb6c73a165
F src/bitvec.c 19a4ba637bd85f8f63fc8c9bae5ade9fb05ec1cb
F src/btmutex.c 976f45a12e37293e32cae0281b15a21d48a8aaa7
F src/btree.c 3f7bbfd72efb1cbf6a49515c376a031767ec930a
F src/btree.h 6fa8a3ff2483d0bb64a9f0105a8cedeac9e00cca
F src/btree.c 9b985e4f334a1b3df5733e2ac2de1de9bdd41be7
F src/btree.h bfe0e8c5759b4ec77b0d18390064a6ef3cdffaaf
F src/btreeInt.h eecc84f02375b2bb7a44abbcbbe3747dde73edb2
F src/build.c cee4724668ebc09bb482c1be30f96e0ae2474f9b
F src/callback.c d7e46f40c3cf53c43550b7da7a1d0479910b62cc
@@ -185,7 +185,7 @@ F src/journal.c b4124532212b6952f42eb2c12fa3c25701d8ba8d
F src/legacy.c 0df0b1550b9cc1f58229644735e317ac89131f12
F src/lempar.c cdf0a000315332fc9b50b62f3b5e22e080a0952b
F src/loadext.c 867c7b330b740c6c917af9956b13b81d0a048303
F src/main.c 4e4cd5c2ee09db496c0dde79b507bba6b8bcbdcb
F src/main.c dc02c7c118d58049e0cccc6c9c47c0a4d3e2bcda
F src/malloc.c fe085aa851b666b7c375c1ff957643dc20a04bf6
F src/mem0.c 6a55ebe57c46ca1a7d98da93aaa07f99f1059645
F src/mem1.c 437c7c4af964895d4650f29881df63535caaa1fa
@@ -204,13 +204,13 @@ F src/os.h 4a46270a64e9193af4a0aaa3bc2c66dc07c29b3f
F src/os_common.h 92815ed65f805560b66166e3583470ff94478f04
F src/os_unix.c 9eafa5458cf2ff684ddccff82c9bb113c7cad847
F src/os_win.c 1d84f2079d9b91f91a4b5dbfa5e08f1b1a0ed0ff
F src/pager.c 5d2f7475260a8588f9c441bb309d2b7eaa7ded3b
F src/pager.h 5cb78b8e1adfd5451e600be7719f5a99d87ac3b1
F src/pager.c 7c999137cb940133f7fc7609ccfa66f17eec4ab4
F src/pager.h 66e42d6942a445d4c25651733ab2079dbebc7ca9
F src/parse.y 27c6b4138497d6f8360ba7847da6ed48033f957f
F src/pcache.c f8043b433a57aba85384a531e3937a804432a346
F src/pcache.h a5e4f5d9f5d592051d91212c5949517971ae6222
F src/pcache1.c d23d07716de96c7c0c2503ec5051a4384c3fb938
F src/pragma.c 590c75750d93ec5a1f903e4bb0dc6d2a0845bf8b
F src/pragma.c 3fd0f90f7106fdfe9daf59cb1dc5ad6f2bcec878
F src/prepare.c fa6988589f39af8504a61731614cd4f6ae71554f
F src/printf.c 41c49dac366a3a411190001a8ab495fa8887974e
F src/random.c cd4a67b3953b88019f8cd4ccd81394a8ddfaba50
@@ -221,7 +221,7 @@ F src/shell.c 927e17b37b63b24461e372d982138fb22c4df321
F src/sqlite.h.in bd1451ba1ab681022a53bccc3c39580ba094a3ff
F src/sqlite3.rc fea433eb0a59f4c9393c8e6d76a6e2596b1fe0c0
F src/sqlite3ext.h 886f5a34de171002ad46fae8c36a7d8051c190fc
F src/sqliteInt.h b2a4e9a85e4bb49c1537fe7fc6532cd7ebe82aa0
F src/sqliteInt.h eae58298bc7c9a491ad2fc6c600f534b74be8a11
F src/sqliteLimit.h 164b0e6749d31e0daa1a4589a169d31c0dec7b3d
F src/status.c 7ac05a5c7017d0b9f0b4bcd701228b784f987158
F src/table.c 2cd62736f845d82200acfa1287e33feb3c15d62e
@@ -1105,7 +1105,10 @@ F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
F tool/warnings.sh fbc018d67fd7395f440c28f33ef0f94420226381
F tool/wherecosttest.c f407dc4c79786982a475261866a161cd007947ae
F tool/win/sqlite.vsix 97894c2790eda7b5bce3cc79cb2a8ec2fde9b3ac
P c78b357c00a35ed48ce2ffbc041de8d22570d1e2
R 0cad26d57aaadc86e4d0689961c53035
P f2d175f975cd0be63425424ec322a98fb650019e
R 51784bade3c91fc13297b6a9e11bfbe0
T *branch * cache_spill
T *sym-cache_spill *
T -sym-trunk *
U drh
Z 9ac8068bb659c66e2e7c0f0532626e1f
Z 6759e9990b6aac3480039cd24c99d255

2
manifest.uuid
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@@ -1 +1 @@
f2d175f975cd0be63425424ec322a98fb650019e
cdb181c04fa99c6c29f23eb68ccb5475e7f6bf9c

9
src/btree.c
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@@ -2165,17 +2165,14 @@ int sqlite3BtreeSetMmapLimit(Btree *p, sqlite3_int64 szMmap){
** probability of damage to near zero but with a write performance reduction.
*/
#ifndef SQLITE_OMIT_PAGER_PRAGMAS
int sqlite3BtreeSetSafetyLevel(
int sqlite3BtreeSetPagerFlags(
Btree *p, /* The btree to set the safety level on */
int level, /* PRAGMA synchronous. 1=OFF, 2=NORMAL, 3=FULL */
int fullSync, /* PRAGMA fullfsync. */
int ckptFullSync /* PRAGMA checkpoint_fullfync */
unsigned pgFlags /* Various PAGER_* flags */
){
BtShared *pBt = p->pBt;
assert( sqlite3_mutex_held(p->db->mutex) );
assert( level>=1 && level<=3 );
sqlite3BtreeEnter(p);
sqlite3PagerSetSafetyLevel(pBt->pPager, level, fullSync, ckptFullSync);
sqlite3PagerSetFlags(pBt->pPager, pgFlags);
sqlite3BtreeLeave(p);
return SQLITE_OK;
}

2
src/btree.h
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@@ -64,7 +64,7 @@ int sqlite3BtreeOpen(
int sqlite3BtreeClose(Btree*);
int sqlite3BtreeSetCacheSize(Btree*,int);
int sqlite3BtreeSetMmapLimit(Btree*,sqlite3_int64);
int sqlite3BtreeSetSafetyLevel(Btree*,int,int,int);
int sqlite3BtreeSetPagerFlags(Btree*,unsigned);
int sqlite3BtreeSyncDisabled(Btree*);
int sqlite3BtreeSetPageSize(Btree *p, int nPagesize, int nReserve, int eFix);
int sqlite3BtreeGetPageSize(Btree*);

2
src/main.c
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@@ -2461,7 +2461,7 @@ static int openDatabase(
db->nextAutovac = -1;
db->szMmap = sqlite3GlobalConfig.szMmap;
db->nextPagesize = 0;
db->flags |= SQLITE_ShortColNames | SQLITE_EnableTrigger
db->flags |= SQLITE_ShortColNames | SQLITE_EnableTrigger | SQLITE_CacheSpill
#if !defined(SQLITE_DEFAULT_AUTOMATIC_INDEX) || SQLITE_DEFAULT_AUTOMATIC_INDEX
| SQLITE_AutoIndex
#endif

85
src/pager.c
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@@ -453,6 +453,13 @@ struct PagerSavepoint {
#endif
};
/*
** Bits of the Pager.doNotSpill flag. See further description below.
*/
#define SPILLFLAG_OFF 0x01 /* Never spill cache. Set via pragma */
#define SPILLFLAG_ROLLBACK 0x02 /* Current rolling back, so do not spill */
#define SPILLFLAG_NOSYNC 0x04 /* Spill is ok, but do not sync */
/*
** A open page cache is an instance of struct Pager. A description of
** some of the more important member variables follows:
@@ -519,19 +526,21 @@ struct PagerSavepoint {
** journal file from being successfully finalized, the setMaster flag
** is cleared anyway (and the pager will move to ERROR state).
**
** doNotSpill, doNotSyncSpill
** doNotSpill
**
** These two boolean variables control the behavior of cache-spills
** (calls made by the pcache module to the pagerStress() routine to
** write cached data to the file-system in order to free up memory).
** This variables control the behavior of cache-spills (calls made by
** the pcache module to the pagerStress() routine to write cached data
** to the file-system in order to free up memory).
**
** When doNotSpill is non-zero, writing to the database from pagerStress()
** is disabled altogether. This is done in a very obscure case that
** When bits SPILLFLAG_OFF or SPILLFLAG_ROLLBACK of doNotSpill are set,
** writing to the database from pagerStress() is disabled altogether.
** The SPILLFLAG_ROLLBACK case is done in a very obscure case that
** comes up during savepoint rollback that requires the pcache module
** to allocate a new page to prevent the journal file from being written
** while it is being traversed by code in pager_playback().
** while it is being traversed by code in pager_playback(). The SPILLFLAG_OFF
** case is a user preference.
**
** If doNotSyncSpill is non-zero, writing to the database from pagerStress()
** If the SPILLFLAG_NOSYNC bit is set, writing to the database from pagerStress()
** is permitted, but syncing the journal file is not. This flag is set
** by sqlite3PagerWrite() when the file-system sector-size is larger than
** the database page-size in order to prevent a journal sync from happening
@@ -635,7 +644,6 @@ struct Pager {
u8 changeCountDone; /* Set after incrementing the change-counter */
u8 setMaster; /* True if a m-j name has been written to jrnl */
u8 doNotSpill; /* Do not spill the cache when non-zero */
u8 doNotSyncSpill; /* Do not do a spill that requires jrnl sync */
u8 subjInMemory; /* True to use in-memory sub-journals */
Pgno dbSize; /* Number of pages in the database */
Pgno dbOrigSize; /* dbSize before the current transaction */
@@ -2295,11 +2303,11 @@ static int pager_playback_one_page(
** requiring a journal-sync before it is written.
*/
assert( isSavepnt );
assert( pPager->doNotSpill==0 );
pPager->doNotSpill++;
assert( (pPager->doNotSpill & SPILLFLAG_ROLLBACK)==0 );
pPager->doNotSpill |= SPILLFLAG_ROLLBACK;
rc = sqlite3PagerAcquire(pPager, pgno, &pPg, 1);
assert( pPager->doNotSpill==1 );
pPager->doNotSpill--;
assert( (pPager->doNotSpill & SPILLFLAG_ROLLBACK)!=0 );
pPager->doNotSpill &= ~SPILLFLAG_ROLLBACK;
if( rc!=SQLITE_OK ) return rc;
pPg->flags &= ~PGHDR_NEED_READ;
sqlite3PcacheMakeDirty(pPg);
@@ -3404,9 +3412,12 @@ void sqlite3PagerShrink(Pager *pPager){
}
/*
** Adjust the robustness of the database to damage due to OS crashes
** or power failures by changing the number of syncs()s when writing
** the rollback journal. There are three levels:
** Adjust settings of the pager to those specified in the pgFlags parameter.
**
** The "level" in pgFlags & PAGER_SYNCHRONOUS_MASK sets the robustness
** of the database to damage due to OS crashes or power failures by
** changing the number of syncs()s when writing the journals.
** There are three levels:
**
** OFF sqlite3OsSync() is never called. This is the default
** for temporary and transient files.
@@ -3447,22 +3458,21 @@ void sqlite3PagerShrink(Pager *pPager){
** and FULL=3.
*/
#ifndef SQLITE_OMIT_PAGER_PRAGMAS
void sqlite3PagerSetSafetyLevel(
void sqlite3PagerSetFlags(
Pager *pPager, /* The pager to set safety level for */
int level, /* PRAGMA synchronous. 1=OFF, 2=NORMAL, 3=FULL */
int bFullFsync, /* PRAGMA fullfsync */
int bCkptFullFsync /* PRAGMA checkpoint_fullfsync */
unsigned pgFlags /* Various flags */
){
unsigned level = pgFlags & PAGER_SYNCHRONOUS_MASK;
assert( level>=1 && level<=3 );
pPager->noSync = (level==1 || pPager->tempFile) ?1:0;
pPager->fullSync = (level==3 && !pPager->tempFile) ?1:0;
if( pPager->noSync ){
pPager->syncFlags = 0;
pPager->ckptSyncFlags = 0;
}else if( bFullFsync ){
}else if( pgFlags & PAGER_FULLFSYNC ){
pPager->syncFlags = SQLITE_SYNC_FULL;
pPager->ckptSyncFlags = SQLITE_SYNC_FULL;
}else if( bCkptFullFsync ){
}else if( pgFlags & PAGER_CKPT_FULLFSYNC ){
pPager->syncFlags = SQLITE_SYNC_NORMAL;
pPager->ckptSyncFlags = SQLITE_SYNC_FULL;
}else{
@@ -3473,6 +3483,11 @@ void sqlite3PagerSetSafetyLevel(
if( pPager->fullSync ){
pPager->walSyncFlags |= WAL_SYNC_TRANSACTIONS;
}
if( pgFlags & PAGER_CACHESPILL ){
pPager->doNotSpill &= ~SPILLFLAG_OFF;
}else{
pPager->doNotSpill |= SPILLFLAG_OFF;
}
}
#endif
@@ -4373,13 +4388,14 @@ static int pagerStress(void *p, PgHdr *pPg){
assert( pPg->pPager==pPager );
assert( pPg->flags&PGHDR_DIRTY );
/* The doNotSyncSpill flag is set during times when doing a sync of
/* The doNotSpill NOSYNC bit is set during times when doing a sync of
** journal (and adding a new header) is not allowed. This occurs
** during calls to sqlite3PagerWrite() while trying to journal multiple
** pages belonging to the same sector.
**
** The doNotSpill flag inhibits all cache spilling regardless of whether
** or not a sync is required. This is set during a rollback.
** The doNotSpill ROLLBACK and OFF bits inhibits all cache spilling
** regardless of whether or not a sync is required. This is set during
** a rollback or by user request, respectively.
**
** Spilling is also prohibited when in an error state since that could
** lead to database corruption. In the current implementaton it
@@ -4389,8 +4405,13 @@ static int pagerStress(void *p, PgHdr *pPg){
** test for the error state as a safeguard against future changes.
*/
if( NEVER(pPager->errCode) ) return SQLITE_OK;
if( pPager->doNotSpill ) return SQLITE_OK;
if( pPager->doNotSyncSpill && (pPg->flags & PGHDR_NEED_SYNC)!=0 ){
testcase( pPager->doNotSpill & SPILLFLAG_ROLLBACK );
testcase( pPager->doNotSpill & SPILLFLAG_OFF );
testcase( pPager->doNotSpill & SPILLFLAG_NOSYNC );
if( pPager->doNotSpill
&& ((pPager->doNotSpill & (SPILLFLAG_ROLLBACK|SPILLFLAG_OFF))!=0
|| (pPg->flags & PGHDR_NEED_SYNC)!=0)
){
return SQLITE_OK;
}
@@ -5744,13 +5765,13 @@ int sqlite3PagerWrite(DbPage *pDbPage){
int ii; /* Loop counter */
int needSync = 0; /* True if any page has PGHDR_NEED_SYNC */
/* Set the doNotSyncSpill flag to 1. This is because we cannot allow
/* Set the doNotSpill NOSYNC bit to 1. This is because we cannot allow
** a journal header to be written between the pages journaled by
** this function.
*/
assert( !MEMDB );
assert( pPager->doNotSyncSpill==0 );
pPager->doNotSyncSpill++;
assert( (pPager->doNotSpill & SPILLFLAG_NOSYNC)==0 );
pPager->doNotSpill |= SPILLFLAG_NOSYNC;
/* This trick assumes that both the page-size and sector-size are
** an integer power of 2. It sets variable pg1 to the identifier
@@ -5809,8 +5830,8 @@ int sqlite3PagerWrite(DbPage *pDbPage){
}
}
assert( pPager->doNotSyncSpill==1 );
pPager->doNotSyncSpill--;
assert( (pPager->doNotSpill & SPILLFLAG_NOSYNC)!=0 );
pPager->doNotSpill &= ~SPILLFLAG_NOSYNC;
}else{
rc = pager_write(pDbPage);
}

14
src/pager.h
View File

@@ -84,6 +84,18 @@ typedef struct PgHdr DbPage;
#define PAGER_ACQUIRE_NOCONTENT 0x01 /* Do not load data from disk */
#define PAGER_ACQUIRE_READONLY 0x02 /* Read-only page is acceptable */
/*
** Flags for sqlite3PagerSetFlags()
*/
#define PAGER_SYNCHRONOUS_OFF 0x01 /* PRAGMA synchronous=OFF */
#define PAGER_SYNCHRONOUS_NORMAL 0x02 /* PRAGMA synchronous=NORMAL */
#define PAGER_SYNCHRONOUS_FULL 0x03 /* PRAGMA synchronous=FULL */
#define PAGER_SYNCHRONOUS_MASK 0x03 /* Mask for three values above */
#define PAGER_FULLFSYNC 0x04 /* PRAGMA fullfsync=ON */
#define PAGER_CKPT_FULLFSYNC 0x08 /* PRAGMA checkpoint_fullfsync=ON */
#define PAGER_CACHESPILL 0x10 /* PRAGMA cache_spill=ON */
#define PAGER_FLAGS_MASK 0x1c /* All above except SYNCHRONOUS */
/*
** The remainder of this file contains the declarations of the functions
** that make up the Pager sub-system API. See source code comments for
@@ -110,7 +122,7 @@ int sqlite3PagerMaxPageCount(Pager*, int);
void sqlite3PagerSetCachesize(Pager*, int);
void sqlite3PagerSetMmapLimit(Pager *, sqlite3_int64);
void sqlite3PagerShrink(Pager*);
void sqlite3PagerSetSafetyLevel(Pager*,int,int,int);
void sqlite3PagerSetFlags(Pager*,unsigned);
int sqlite3PagerLockingMode(Pager *, int);
int sqlite3PagerSetJournalMode(Pager *, int);
int sqlite3PagerGetJournalMode(Pager*);

12
src/pragma.c
View File

@@ -176,6 +176,7 @@ static int flagPragma(Parse *pParse, const char *zLeft, const char *zRight){
{ "legacy_file_format", SQLITE_LegacyFileFmt },
{ "fullfsync", SQLITE_FullFSync },
{ "checkpoint_fullfsync", SQLITE_CkptFullFSync },
{ "cache_spill", SQLITE_CacheSpill },
{ "reverse_unordered_selects", SQLITE_ReverseOrder },
{ "query_only", SQLITE_QueryOnly },
#ifndef SQLITE_OMIT_AUTOMATIC_INDEX
@@ -1811,9 +1812,14 @@ void sqlite3Pragma(
*/
#ifndef SQLITE_OMIT_PAGER_PRAGMAS
if( db->autoCommit ){
sqlite3BtreeSetSafetyLevel(pDb->pBt, pDb->safety_level,
(db->flags&SQLITE_FullFSync)!=0,
(db->flags&SQLITE_CkptFullFSync)!=0);
assert( (pDb->safety_level & PAGER_SYNCHRONOUS_MASK)==pDb->safety_level );
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 );
sqlite3BtreeSetPagerFlags(pDb->pBt,
pDb->safety_level | (db->flags & PAGER_FLAGS_MASK) );
}
#endif
pragma_out:

47
src/sqliteInt.h
View File

@@ -972,32 +972,33 @@ struct sqlite3 {
*/
#define SQLITE_VdbeTrace 0x00000001 /* True to trace VDBE execution */
#define SQLITE_InternChanges 0x00000002 /* Uncommitted Hash table changes */
#define SQLITE_FullColNames 0x00000004 /* Show full column names on SELECT */
#define SQLITE_ShortColNames 0x00000008 /* Show short columns names */
#define SQLITE_CountRows 0x00000010 /* Count rows changed by INSERT, */
#define SQLITE_FullFSync 0x00000004 /* Use full fsync on the backend */
#define SQLITE_CkptFullFSync 0x00000008 /* Use full fsync for checkpoint */
#define SQLITE_CacheSpill 0x00000010 /* OK to spill pager cache */
#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 0x00000020 /* Invoke the callback once if the */
#define SQLITE_NullCallback 0x00000100 /* Invoke the callback once if the */
/* result set is empty */
#define SQLITE_SqlTrace 0x00000040 /* Debug print SQL as it executes */
#define SQLITE_VdbeListing 0x00000080 /* Debug listings of VDBE programs */
#define SQLITE_WriteSchema 0x00000100 /* OK to update SQLITE_MASTER */
#define SQLITE_VdbeAddopTrace 0x00000200 /* Trace sqlite3VdbeAddOp() calls */
#define SQLITE_IgnoreChecks 0x00000400 /* Do not enforce check constraints */
#define SQLITE_ReadUncommitted 0x0000800 /* For shared-cache mode */
#define SQLITE_LegacyFileFmt 0x00001000 /* Create new databases in format 1 */
#define SQLITE_FullFSync 0x00002000 /* Use full fsync on the backend */
#define SQLITE_CkptFullFSync 0x00004000 /* Use full fsync for checkpoint */
#define SQLITE_RecoveryMode 0x00008000 /* Ignore schema errors */
#define SQLITE_ReverseOrder 0x00010000 /* Reverse unordered SELECTs */
#define SQLITE_RecTriggers 0x00020000 /* Enable recursive triggers */
#define SQLITE_ForeignKeys 0x00040000 /* Enforce foreign key constraints */
#define SQLITE_AutoIndex 0x00080000 /* Enable automatic indexes */
#define SQLITE_PreferBuiltin 0x00100000 /* Preference to built-in funcs */
#define SQLITE_LoadExtension 0x00200000 /* Enable load_extension */
#define SQLITE_EnableTrigger 0x00400000 /* True to enable triggers */
#define SQLITE_DeferFKs 0x00800000 /* Defer all FK constraints */
#define SQLITE_QueryOnly 0x01000000 /* Disable database changes */
#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_VdbeAddopTrace 0x00001000 /* Trace sqlite3VdbeAddOp() calls */
#define SQLITE_IgnoreChecks 0x00002000 /* Do not enforce check constraints */
#define SQLITE_ReadUncommitted 0x0004000 /* For shared-cache mode */
#define SQLITE_LegacyFileFmt 0x00008000 /* Create new databases in format 1 */
#define SQLITE_RecoveryMode 0x00010000 /* Ignore schema errors */
#define SQLITE_ReverseOrder 0x00020000 /* Reverse unordered SELECTs */
#define SQLITE_RecTriggers 0x00040000 /* Enable recursive triggers */
#define SQLITE_ForeignKeys 0x00080000 /* Enforce foreign key constraints */
#define SQLITE_AutoIndex 0x00100000 /* Enable automatic indexes */
#define SQLITE_PreferBuiltin 0x00200000 /* Preference to built-in funcs */
#define SQLITE_LoadExtension 0x00400000 /* Enable load_extension */
#define SQLITE_EnableTrigger 0x00800000 /* True to enable triggers */
#define SQLITE_DeferFKs 0x01000000 /* Defer all FK constraints */
#define SQLITE_QueryOnly 0x02000000 /* Disable database changes */
/*