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Parents and children of check-in [16b34f25]

2016-01-09
23:55
All WAL frame overwrites even if there are active savepoints. This is safe because a ROLLBACK TO will cause all reverted pages to be rewritten to the WAL file prior to COMMIT. check-in: 99b31a6b user: drh tags: wal-overwrite-frames
18:57
If it is known that checksums will be recalculated on transaction commit, skip calculating checksums when appending frames to the wal file. When recalculating checksums, recalculate them starting with the first overwritten frame - not the first frame in the transaction. check-in: 16b34f25 user: dan tags: wal-overwrite-frames
16:39
If a single page is written to the wal file more than once, have each subsequent copy overwrite the original frame. check-in: 5d113aef user: dan tags: wal-overwrite-frames