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Overview
| Comment: | Improved comment on the pager.c PERSIST rollback journal delete logic inside of hasHotJournal(). No changes to code. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: | e5b17a9d07a35c9b44ff977ba81b93d745d26a11 |
| User & Date: | drh 2014-03-07 14:57:07 |
Context
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2014-03-08
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| 19:07 | Fix a bug causing "SELECT char()" to return SQLITE_NOMEM. check-in: ba39df9d user: dan tags: trunk | |
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2014-03-07
| ||
| 14:57 | Improved comment on the pager.c PERSIST rollback journal delete logic inside of hasHotJournal(). No changes to code. check-in: e5b17a9d user: drh tags: trunk | |
| 03:31 | Revise change from the previous check-in to clarify the situation when handling open journal files, regardless of journal mode. check-in: 1c318ef3 user: mistachkin tags: trunk | |
Changes
Changes to src/pager.c.
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** in fact there is none. This results in a false-positive which will
** be dealt with by the playback routine. Ticket #3883.
*/
rc = sqlite3OsCheckReservedLock(pPager->fd, &locked);
if( rc==SQLITE_OK && !locked ){
Pgno nPage; /* Number of pages in database file */
/* Check the size of the database file. If it consists of 0 pages
** and the journal is not being persisted, then delete the journal
** file. See the header comment above for the reasoning here.
** Delete the obsolete journal file under a RESERVED lock to avoid
** race conditions and to avoid violating [H33020].
*/
rc = pagerPagecount(pPager, &nPage);
if( rc==SQLITE_OK ){
if( nPage==0 && !jrnlOpen ){
sqlite3BeginBenignMalloc();
if( pagerLockDb(pPager, RESERVED_LOCK)==SQLITE_OK ){
sqlite3OsDelete(pVfs, pPager->zJournal, 0);
if( !pPager->exclusiveMode ) pagerUnlockDb(pPager, SHARED_LOCK);
}
sqlite3EndBenignMalloc();
|
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** in fact there is none. This results in a false-positive which will
** be dealt with by the playback routine. Ticket #3883.
*/
rc = sqlite3OsCheckReservedLock(pPager->fd, &locked);
if( rc==SQLITE_OK && !locked ){
Pgno nPage; /* Number of pages in database file */
rc = pagerPagecount(pPager, &nPage);
if( rc==SQLITE_OK ){
/* If the database is zero pages in size, that means that either (1) the
** journal is a remnant from a prior database with the same name where
** the database file but not the journal was deleted, or (2) the initial
** transaction that populates a new database is being rolled back.
** In either case, the journal file can be deleted. However, take care
** not to delete the journal file if it is already open due to
** journal_mode=PERSIST.
*/
if( nPage==0 && !jrnlOpen ){
sqlite3BeginBenignMalloc();
if( pagerLockDb(pPager, RESERVED_LOCK)==SQLITE_OK ){
sqlite3OsDelete(pVfs, pPager->zJournal, 0);
if( !pPager->exclusiveMode ) pagerUnlockDb(pPager, SHARED_LOCK);
}
sqlite3EndBenignMalloc();
|