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Overview
| Comment: | Enclose the sqlite3WalSnapshotRecover() routine within |
|---|---|
| Downloads: | Tarball | ZIP archive |
| Timelines: | family | ancestors | descendants | both | serializable-snapshot |
| Files: | files | file ages | folders |
| SHA1: |
e7be3183eb25e0f9f04b9e251ff37fa5 |
| User & Date: | drh 2016-11-22 21:11:59.294 |
Context
|
2016-11-22
| ||
| 22:23 | Merge bug fixes and enhancements from trunk. (Closed-Leaf check-in: e2c4bdf54f user: drh tags: serializable-snapshot) | |
| 21:11 | Enclose the sqlite3WalSnapshotRecover() routine within (check-in: e7be3183eb user: drh tags: serializable-snapshot) | |
|
2016-11-19
| ||
| 18:31 | Remove the requirement to open the wal file before sqlite3_snapshot_recover() is called. Also add some comments to new functions. (check-in: 28393c413c user: dan tags: serializable-snapshot) | |
Changes
Changes to src/wal.c.
| ︙ | ︙ | |||
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}else{
assert( mxReadMark<=pWal->hdr.mxFrame );
pWal->readLock = (i16)mxI;
}
return rc;
}
/*
** Attempt to reduce the value of the WalCkptInfo.nBackfillAttempted
** variable so that older snapshots can be accessed. To do this, loop
** through all wal frames from nBackfillAttempted to (nBackfill+1),
** comparing their content to the corresponding page with the database
** file, if any. Set nBackfillAttempted to the frame number of the
** first frame for which the wal file content matches the db file.
| > | 2375 2376 2377 2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 |
}else{
assert( mxReadMark<=pWal->hdr.mxFrame );
pWal->readLock = (i16)mxI;
}
return rc;
}
#ifdef SQLITE_ENABLE_SNAPSHOT
/*
** Attempt to reduce the value of the WalCkptInfo.nBackfillAttempted
** variable so that older snapshots can be accessed. To do this, loop
** through all wal frames from nBackfillAttempted to (nBackfill+1),
** comparing their content to the corresponding page with the database
** file, if any. Set nBackfillAttempted to the frame number of the
** first frame for which the wal file content matches the db file.
|
| ︙ | ︙ | |||
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sqlite3_free(pBuf2);
}
walUnlockExclusive(pWal, WAL_CKPT_LOCK, 1);
}
return rc;
}
/*
** Begin a read transaction on the database.
**
** This routine used to be called sqlite3OpenSnapshot() and with good reason:
** it takes a snapshot of the state of the WAL and wal-index for the current
** instant in time. The current thread will continue to use this snapshot.
| > | 2451 2452 2453 2454 2455 2456 2457 2458 2459 2460 2461 2462 2463 2464 2465 |
sqlite3_free(pBuf2);
}
walUnlockExclusive(pWal, WAL_CKPT_LOCK, 1);
}
return rc;
}
#endif /* SQLITE_ENABLE_SNAPSHOT */
/*
** Begin a read transaction on the database.
**
** This routine used to be called sqlite3OpenSnapshot() and with good reason:
** it takes a snapshot of the state of the WAL and wal-index for the current
** instant in time. The current thread will continue to use this snapshot.
|
| ︙ | ︙ |