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15 check-ins tagged with "reuse-subqueries"
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2024-07-05
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| 01:05 | Small performance optimizations. (Closed-Leaf check-in: 99fd34b58a user: drh tags: reuse-subqueries) | |
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2024-07-04
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| 18:56 | Add test cases to in7.test. (check-in: 07817efc10 user: dan tags: reuse-subqueries) | |
| 18:26 | Disable the reuse of IN-clause subqueries if the subquery is an explicit "SELECT ALL". The ALL keyword is almost never used in actual practice (most developers don't even know it can be used) so this should not interfere with the optimization, but it does give us a convenient way to turn it off for testing purposes. (check-in: a81299be2c user: drh tags: reuse-subqueries) | |
| 17:49 | Update EXPLAIN output to include P4_SUBRTNSIG. (check-in: 61e56923c8 user: dan tags: reuse-subqueries) | |
| 16:57 | Be more aggressive about reusing subqueries that appear on the RHS of IN operators that have been replicated due to the predicate push-down optimization. (check-in: 2accf32b6e user: drh tags: reuse-subqueries) | |
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2018-12-31
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| 20:13 | Remove an optimization that can no longer occur, being superceded by the subquery-reuse optimization.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) | |
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2018-12-28
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| 21:32 | Merge performance enhancements from trunk. (check-in: 0f1b9ff9e1 user: drh tags: reuse-subqueries) | |
| 19:23 | Merge patches and enhancements from trunk. (check-in: da53f3d3ff user: drh tags: reuse-subqueries) | |
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2018-12-25
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| 00:15 | Increase the number of parameters to sqlite3WhereCodeOneLoopStart() to encourage the compiler to inline that routine within sqlite3WhereBegin(). This gives a performance improvement. (check-in: 3c2ad0e915 user: drh tags: reuse-subqueries) | |
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2018-12-24
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| 20:21 | Improvements to EXPLAIN QUERY PLAN formatting. The MULTI-INDEX OR now shows a separate "INDEX" subtree for each index. SCALAR SUBQUERY entries provide a subquery number that is related back to the .selecttrace output. (check-in: 7153552bac user: drh tags: reuse-subqueries) | |
| 14:30 | Restore a line of code that was previously commented out for debugging. (check-in: e53781f5bd user: drh tags: reuse-subqueries) | |
| 12:09 | Do not generate subroutines for non-static SELECT and EXISTS expressions. Fix up some test cases to account for the minor changes in EXPLAIN QUERY PLAN output. (check-in: 06de44ec9e user: drh tags: reuse-subqueries) | |
| 11:55 | Prevent the use of subroutines to implement the RHS of IN operators within CHECK constraints. (check-in: 6b24d3fb94 user: drh tags: reuse-subqueries) | |
| 02:34 | Experimental code that tries to put the computation of subqueries inside a subroutine, and reuse that subroutine if the same subquery is evaluated more than once. Current code does not work for CHECK constraints. (check-in: 6c44838adb user: drh tags: reuse-subqueries) | |