drh
56c65c92cb
When the sqlite_stat1 data is missing for some indexes of a table but is
...
present for the table itself or for other indexes in the same table, then do
not let the estimated number of rows in that table get too small, as
doing so can deceive the query planner into ignoring a perfectly good index.
FossilOrigin-Name: 98d4262018a81a9a36dd8beb4b02ff0e75cdcbb8a121d143157ffb37b228d60d
2020-05-28 00:45:16 +00:00
drh
bd462bcc10
Improvements to EXPLAIN QUERY PLAN formatting. The MULTI-INDEX OR now shows
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a separate "INDEX" subtree for each index. SCALAR SUBQUERY entries provide
a subquery number that is related back to the .selecttrace output.
FossilOrigin-Name: 7153552bac51295c56a1c42ca79d57195851e232509f9e9610375692f48c7e86
2018-12-24 20:21:06 +00:00
drh
5d72d9245d
Make a separate limb in the EXPLAIN QUERY PLAN output for the various lines
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associated with the OR-optimization.
FossilOrigin-Name: 75ac7b4e4fd0811ca80c719badacff207e0bbd00ac64dde3b3d4ec676fad472d
2018-05-04 00:39:43 +00:00
drh
b3f0276b9e
Fix test cases so that they work with the new EXPLAIN QUERY PLAN output
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format. Only some of the cases have been fixed. This is an incremental
check-in.
FossilOrigin-Name: 5f0e803e33aa557865d5fc830d9202d628de9a94c9757058ca48f1a560702cd3
2018-05-02 18:00:17 +00:00
drh
a23bc8a345
From test scripts, remove stray "breakpoint" commands and blank lines
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at the ends of files.
FossilOrigin-Name: a6b35273239669189f33402144f58328b133d182
2016-02-05 16:46:09 +00:00
dan
5a0b8b124b
Add a test to double-check that [1cbe7a0883] did not affect anything.
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FossilOrigin-Name: c6b512a724aebcd084aad2a80d020b95773b3012
2014-06-03 11:32:38 +00:00
dan
5da73e1a09
Fix a problem in calculating the costs of "OR" scans.
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FossilOrigin-Name: 9bbca48b42e4fe16f2188e18dc736da30a96435c
2014-04-30 18:11:55 +00:00
dan
75525cbe24
Update a couple of test cases to account for the fact that this branch prefers an index scan and partial sort over a full-table scan and full external sort.
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FossilOrigin-Name: 9b975bf33cd8fc28c64183a9642bf9fb436a4746
2014-04-30 14:53:21 +00:00
dan
264d2b97a9
Test that the default values used when sqlite_stat1 data is not available are calculated correctly. Fixes for the same.
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FossilOrigin-Name: e2d42f909de85a0586389f2dc0e654f7af2e351a
2014-04-29 19:01:57 +00:00
dan
09e1df6c00
Ignore likelihood() values on indexed IPK lookups.
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FossilOrigin-Name: 5bb7757a7b32a74482d3e93e9c9eea02273fe981
2014-04-29 16:10:22 +00:00
dan
7de2a1faf6
Do not reduce the number of rows scanned at all for "IS NOT NULL" constraints. Fix a bug in calculating the number of rows visited by scans of partial indicies.
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FossilOrigin-Name: a8ae93f0cffa116df0ba34d46a53f49d42dace41
2014-04-28 20:11:20 +00:00
dan
440e6ff3b0
Fix an error in estimating of the number of rows visited by a range scan.
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FossilOrigin-Name: d491de62fce69d93e89f65f7713972f7c2c451f7
2014-04-28 08:49:54 +00:00
dan
2dd3cdcfab
Fix an sqlite3_stmt_status() problem caused by recent changs on this branch.
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FossilOrigin-Name: dee204092421a239f9f60ab83c3a5b3e24d1baea
2014-04-26 20:21:14 +00:00
