drh
77c9b3ccb3
Fix an incorrect assert() statement that was added yesterday.
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Tickets [41c1456a6e61c0e7] and [fb8c538a8f57ae2a].
FossilOrigin-Name: abfb043ebb0c55fdc2be58255bc852b13865d81fa4c2e0dbe8c375810557aafe
2020-02-13 11:46:47 +00:00
dan
41aa442cf4
When determining whether an == or IS constraint in a WHERE clause makes an ORDER BY term redundant, consider the collation sequence used by the == or IS comparison, not the collation sequence of the comparison expression itself. Possible fix for [fb8c538a8f].
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FossilOrigin-Name: 16aed5d0c63dcdc2054dbb8a4b6b992476640433bf81e19301e6db5a3fc82633
2020-02-12 11:57:35 +00:00
drh
f559ed3400
Add a small cost penalty to sorting to bias the query planner in favor of
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plans that do not require a final sorting pass.
FossilOrigin-Name: 85b9beb4605eb0cfe2ed063c2a1925186c9e37031f78c875e60a347cce891638
2018-07-28 21:01:55 +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
drh
6284db908a
Fix query planner weights associated with choosing block-sorting. Fix
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block sorting of tables with collating functions. Fix various test cases.
All "veryquick" tests are now passing, though more tests need to be added.
FossilOrigin-Name: 01afbf97c0ff29667806e9a7c4d74ca717819de5
2014-03-19 23:24:49 +00:00
drh
416846a362
Improved ORDER BY optimization for WITHOUT ROWID tables.
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FossilOrigin-Name: 8f1709ff2d52d5ceca3da6a2a4e06da204d9e65a
2013-11-06 12:56:04 +00:00
drh
b8916be945
Add a new ORDER BY optimization that bypasses ORDER BY terms that are
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constrained by == and IS NULL terms of the WHERE clause.
FossilOrigin-Name: b920bb70bb009b7c54e7667544c9810c5ee25e19
2013-06-14 02:51:48 +00:00
