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Overview
| Comment: | Improvement to a comment. No changes to code. |
|---|---|
| Downloads: | Tarball | ZIP archive |
| Timelines: | family | ancestors | descendants | both | readonly-wal-recovery |
| Files: | files | file ages | folders |
| SHA3-256: |
486949fc03706e0056439b52ce60931e |
| User & Date: | drh 2017-11-14 03:42:52.056 |
Context
|
2017-11-14
| ||
| 19:34 | Add the ability to read from read-only WAL-mode database files as long as the -wal and -shm files are present on disk. (check-in: 00ec95fcd0 user: drh tags: trunk) | |
| 03:42 | Improvement to a comment. No changes to code. (Closed-Leaf check-in: 486949fc03 user: drh tags: readonly-wal-recovery) | |
|
2017-11-13
| ||
| 05:51 | Remove some branches in walTryBeginRead() that were added by check-in [ce5d13c2de] but became unreachable with the addition of logic in check-in [18b26843] that enabled read-only clients to parse the WAL file into a heap-memory WAL-index, thus guaranteeing that the WAL-index header is always available. (check-in: 9c6b38b9a9 user: drh tags: readonly-wal-recovery) | |
Changes
Changes to src/wal.c.
| ︙ | ︙ | |||
2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 |
rc = SQLITE_CANTOPEN_BKPT;
}
if( pWal->bShmUnreliable ){
if( rc!=SQLITE_OK ){
walIndexClose(pWal, 0);
pWal->bShmUnreliable = 0;
assert( pWal->nWiData>0 && pWal->apWiData[0]==0 );
if( rc==SQLITE_IOERR_SHORT_READ ) rc = WAL_RETRY;
}
pWal->exclusiveMode = WAL_NORMAL_MODE;
}
return rc;
}
| > > > | 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 |
rc = SQLITE_CANTOPEN_BKPT;
}
if( pWal->bShmUnreliable ){
if( rc!=SQLITE_OK ){
walIndexClose(pWal, 0);
pWal->bShmUnreliable = 0;
assert( pWal->nWiData>0 && pWal->apWiData[0]==0 );
/* walIndexRecover() might have returned SHORT_READ if a concurrent
** writer truncated the WAL out from under it. If that happens, it
** indicates that a writer has fixed the SHM file for us, so retry */
if( rc==SQLITE_IOERR_SHORT_READ ) rc = WAL_RETRY;
}
pWal->exclusiveMode = WAL_NORMAL_MODE;
}
return rc;
}
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| ︙ | ︙ |