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In the query planner, add a heuristic that will reduce the cost of a full

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table scan for a materialized view or subquery if the full scan is the
outer-most loop.  This is shown to speed up some queries.

FossilOrigin-Name: 609fbb94b8f01d6792e5941ab23ce041313d359f6788c4dde6b1ca749ab49137
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drh
2022-09-01 10:29:02 +00:00
parent 9c3a114ca0
commit a3fc683c80
6 changed files with 26 additions and 14 deletions
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test/with3.test
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@ -131,8 +131,8 @@ do_eqp_test 3.2.2 {
| | `--SCALAR SUBQUERY xxxxxx
| | `--SCAN w2
| `--RECURSIVE STEP
| |--SCAN w1
| `--SCAN c
| |--SCAN c
| `--SCAN w1
|--SCAN c
|--SEARCH w2 USING INTEGER PRIMARY KEY (rowid=?)
`--SEARCH w1 USING INTEGER PRIMARY KEY (rowid=?)