mirrors/sqlite
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Change the default_cache_size pragma to always store a positive value.

Browse Source 
FossilOrigin-Name: 36fb2cae75b5dfe1fe818895f03c0b4f4190a722
This commit is contained in:
drh 2010-04-26 17:36:35 +00:00
parent c6d2b4a365
commit 93791ea0ba
3 changed files with 15 additions and 19 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
manifest
View File

@ -1,8 +1,8 @@
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
C Identify\sthe\sSQLite\sversion\smeta-value\sentry\sin\sthe\sdb-header\soutput\sof\nshowdb.
D 2010-04-26T17:30:53
C Change\sthe\sdefault_cache_size\spragma\sto\salways\sstore\sa\spositive\svalue.
D 2010-04-26T17:36:35
F Makefile.arm-wince-mingw32ce-gcc fcd5e9cd67fe88836360bb4f9ef4cb7f8e2fb5a0
F Makefile.in 4f2f967b7e58a35bb74fb7ec8ae90e0f4ca7868b
F Makefile.linux-gcc d53183f4aa6a9192d249731c90dbdffbd2c68654
@ -161,7 +161,7 @@ F src/parse.y ace5c7a125d9f2a410e431ee3209034105045f7e
F src/pcache.c ace8f6a5ecd4711cc66a1b23053be7109bd437cf
F src/pcache.h c683390d50f856d4cd8e24342ae62027d1bb6050
F src/pcache1.c 6dc1871ce8ead9187161c370a58cd06c84221f76
F src/pragma.c e166ea41544f8e57a08db86dbe87212b7d378fe8
F src/pragma.c 71ba42f5a6f1c91266ca065c2a55c168c7846d3a
F src/prepare.c fd1398cb1da54385ba5bd68d93928f10d10a1d9c
F src/printf.c 5f5b65a83e63f2096a541a340722a509fa0240a7
F src/random.c cd4a67b3953b88019f8cd4ccd81394a8ddfaba50
@ -801,14 +801,14 @@ F tool/speedtest2.tcl ee2149167303ba8e95af97873c575c3e0fab58ff
F tool/speedtest8.c 2902c46588c40b55661e471d7a86e4dd71a18224
F tool/speedtest8inst1.c 293327bc76823f473684d589a8160bde1f52c14e
F tool/vdbe-compress.tcl d70ea6d8a19e3571d7ab8c9b75cba86d1173ff0f
P 2ff824e58ce8b8f605c809ac960dcbfc51c30e30
R 07d9a10059fff93d4de005270606b0db
P 245d934b72cbc6e897193e7892195b6561995939
R 1a721a7e3d8403e75d36dd22925eaa62
U drh
Z 92020570ca8608c3a29033eaaebd4aa8
Z d3141c0d53e4f0054b2b5670e084ebf2
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.6 (GNU/Linux)
iD8DBQFL1c3QoxKgR168RlERAk7nAJ0RNPM+2ysEsEOLzmoRWkmlbmvLeACfXafV
1if1i0LIIQFX3bMAD0w2gxM=
=aVQ6
iD8DBQFL1c8noxKgR168RlERAk2fAJwIn4ScLPQ6cD+9QSCdisImYXuM8QCfTXNt
XvbQVdO+MSVbonYnIw7jvtU=
=Dgm7
-----END PGP SIGNATURE-----

2
manifest.uuid
View File

@ -1 +1 @@
245d934b72cbc6e897193e7892195b6561995939
36fb2cae75b5dfe1fe818895f03c0b4f4190a722

14
src/pragma.c
View File

@ -329,11 +329,11 @@ void sqlite3Pragma(
** page cache size value and the persistent page cache size value
** stored in the database file.
**
** The default cache size is stored in meta-value 2 of page 1 of the
** database file. The cache size is actually the absolute value of
** this memory location. The sign of meta-value 2 determines the
** synchronous setting. A negative value means synchronous is off
** and a positive value means synchronous is on.
** 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( sqlite3StrICmp(zLeft,"default_cache_size")==0 ){
static const VdbeOpList getCacheSize[] = {
@ -362,10 +362,6 @@ void sqlite3Pragma(
if( size<0 ) size = -size;
sqlite3BeginWriteOperation(pParse, 0, iDb);
sqlite3VdbeAddOp2(v, OP_Integer, size, 1);
sqlite3VdbeAddOp3(v, OP_ReadCookie, iDb, 2, BTREE_DEFAULT_CACHE_SIZE);
addr = sqlite3VdbeAddOp2(v, OP_IfPos, 2, 0);
sqlite3VdbeAddOp2(v, OP_Integer, -size, 1);
sqlite3VdbeJumpHere(v, addr);
sqlite3VdbeAddOp3(v, OP_SetCookie, iDb, BTREE_DEFAULT_CACHE_SIZE, 1);
pDb->pSchema->cache_size = size;
sqlite3BtreeSetCacheSize(pDb->pBt, pDb->pSchema->cache_size);