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Parents and children of check-in [4fcdc7a293]
|20:39||Additional steps to help ensure that scalar subqueries are only evaluated once even if they are used in multiple places within the query. This fixes a performance regression reported on the mailing list and caused by check-in [531eca6104e41e43] which was a fix for ticket [787fa716be3a7f650c]. Think of this check-in as an improved fix for that ticket. check-in: e130319317 user: drh tags: trunk|
|20:13||Remove an optimization that can no longer occur, being superceded by the subquery-reuse optimization. Put an assert in place of the optimization to detect if the need for this optimization ever returns. Closed-Leaf check-in: 4fcdc7a293 user: drh tags: reuse-subqueries|
|18:30||Merge enhancements and bug fixes from trunk. check-in: 9fb646f29c user: drh tags: reuse-subqueries|