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Changes In Branch defer-where-subqueries Excluding Merge-Ins
This is equivalent to a diff from dc857a96b0 to 0ca7474f05
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2017-07-10
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| 17:00 | When multiple constraints need to be evaluated for a row, do any constraints that involve correlated subqueries last. Hence, the priority is index-covered constraints first, correlated subquery constraints last, and all others in the middle. This is a follow-on and improvement to the push-down optimization of check-in [d7bb79ed]. (check-in: c4cb90487f user: drh tags: trunk) | |
| 16:38 | Additional debugging Noop-comment in the constraint generator when wheretrace is enabled. (Closed-Leaf check-in: 0ca7474f05 user: drh tags: defer-where-subqueries) | |
| 15:26 | Small performance optimization in sqlite3WhereExprUsage(). (check-in: 38edc6770e user: drh tags: defer-where-subqueries) | |
| 14:33 | When testing non-indexed WHERE constraints, test those that involve correlated sub-queries last of all. This increases the chances of not having to run the sub-query at all. (check-in: 1f9c1f359e user: dan tags: defer-where-subqueries) | |
| 13:24 | For sqlite3TreeView() debugging output, show the Expr.flags field on scalar subqueries. (check-in: dc857a96b0 user: drh tags: trunk) | |
| 12:07 | Update error message text for standard error codes to better describe the latest usage of those error codes. Modify sqlite3_open_v2() so that it does return a valid sqlite3 object in the event of SQLITE_MISUSE due to bad open flags, so that sqlite3_errmsg() does not report "out of memory" in that case. (check-in: f27b637040 user: drh tags: trunk) | |
Changes to src/whereInt.h.
Changes to src/wherecode.c.
Changes to src/whereexpr.c.
Changes to test/pushdown.test.