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If SQLITE_ENABLE_ZIPVFS is defined, journal_mode=off is configured and a savepoint or statement rollback is attempted, move the pager into the error state to prevent the transaction from being committed. This makes it safe to use journal_mode=off with zipvfs under some conditions.

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FossilOrigin-Name: 38d31e189e7c7899e14455f2c083aa676ce4d4c0
This commit is contained in:
dan 2016-09-01 09:35:20 +00:00
parent a87070a271
commit d0d49b9ca3
3 changed files with 26 additions and 8 deletions
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12
manifest
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@ -1,5 +1,5 @@
C Use\ssome\sof\sthe\sexample\scode\sfrom\sthe\ssessions\sdocumenatation\sin\sthe\ssessions\stest\scases.
D 2016-08-29T14:18:18.207
C If\sSQLITE_ENABLE_ZIPVFS\sis\sdefined,\sjournal_mode=off\sis\sconfigured\sand\sa\ssavepoint\sor\sstatement\srollback\sis\sattempted,\smove\sthe\spager\sinto\sthe\serror\sstate\sto\sprevent\sthe\stransaction\sfrom\sbeing\scommitted.\sThis\smakes\sit\ssafe\sto\suse\sjournal_mode=off\swith\szipvfs\sunder\ssome\sconditions.
D 2016-09-01T09:35:20.703
F Makefile.in cfd8fb987cd7a6af046daa87daa146d5aad0e088
F Makefile.linux-gcc 7bc79876b875010e8c8f9502eb935ca92aa3c434
F Makefile.msc 5017381e4853b1472e01d5bb926be1268eba429c
@ -371,7 +371,7 @@ F src/os_setup.h 0dbaea40a7d36bf311613d31342e0b99e2536586
F src/os_unix.c be9ca0f901a2b6c1bc93dc338f4863675180c189
F src/os_win.c 520f23475f1de530c435d30b67b7b15fe90874b0
F src/os_win.h 7b073010f1451abe501be30d12f6bc599824944a
F src/pager.c 40928c450320da78bb4bd3ae82818f4239e19b7e
F src/pager.c bf5b71bde3e9b6110e7d6990607db881f6a471a2
F src/pager.h 966d2769e76ae347c8a32c4165faf6e6cb64546d
F src/parse.y ed6990c2d41eb0302eda90d5009c51fec792c850
F src/pcache.c 5583c8ade4b05075a60ba953ef471d1c1a9c05df
@ -1511,7 +1511,7 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
P a07269f2a0f87e0b736127f528f6caf3b63f9052
R e338ebda27cef4eaa61a39e0a172ba0c
P 6602974d17536bcb904a794bddedffd58926794b
R 78dc0041209a92fe8b940a2665fbfc99
U dan
Z 11041cb022515aa05751c4e3c90843c8
Z f1c8273131a5d41903cfd86ae1fce8b9

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6602974d17536bcb904a794bddedffd58926794b
38d31e189e7c7899e14455f2c083aa676ce4d4c0

20
src/pager.c
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@ -6656,7 +6656,11 @@ int sqlite3PagerOpenSavepoint(Pager *pPager, int nSavepoint){
** savepoint. If no errors occur, SQLITE_OK is returned.
*/
int sqlite3PagerSavepoint(Pager *pPager, int op, int iSavepoint){
int rc = pPager->errCode; /* Return code */
int rc = pPager->errCode;
#ifdef SQLITE_ENABLE_ZIPVFS
if( op==SAVEPOINT_RELEASE ) rc = SQLITE_OK;
#endif
assert( op==SAVEPOINT_RELEASE || op==SAVEPOINT_ROLLBACK );
assert( iSavepoint>=0 || op==SAVEPOINT_ROLLBACK );
@ -6697,6 +6701,20 @@ int sqlite3PagerSavepoint(Pager *pPager, int op, int iSavepoint){
rc = pagerPlaybackSavepoint(pPager, pSavepoint);
assert(rc!=SQLITE_DONE);
}
#ifdef SQLITE_ENABLE_ZIPVFS
/* If the cache has been modified but the savepoint cannot be rolled
** back journal_mode=off, put the pager in the error state. This way,
** if the VFS used by this pager includes ZipVFS, the entire transaction
** can be rolled back at the ZipVFS level. */
else if(
pPager->journalMode==PAGER_JOURNALMODE_OFF
&& pPager->eState>=PAGER_WRITER_CACHEMOD
){
pPager->errCode = SQLITE_ABORT;
pPager->eState = PAGER_ERROR;
}
#endif
}
return rc;