a9d1ccb9b0
First pass at optimizing max()/min() as described in #2853 . Some refinements to come. (CVS 4687)
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FossilOrigin-Name: c449e04f1870b1ff726c95c0bf1c6c6a22ca588a
2008-01-05 17:39:29 +00:00
495c09a49a
Make the ORDER BY clause return equal elements in the same order they were
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seen (a stable sort). It was returning them in exactly the reverse order. (CVS 2439)
FossilOrigin-Name: e8391491a68018406e30c2a699a4cab9e0de092c
2005-04-01 10:47:40 +00:00
3e8c37e7f8
Modify test scripts to work when SQLITE_OMIT_SUBQUERY (along with other OMIT macros) is defined. (CVS 2251)
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FossilOrigin-Name: bb0254ab14417f0ab40f10f37cb63a60507f070a
2005-01-21 03:12:14 +00:00
9012bcbc0a
The optimizer now uses only the index and ignores the table if it can get
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away with doing so, thus saving a single BTree search per row of result.
This could potentially double the speed of certain queries. The
code passes all regression tests but new tests to exercise the new
functionality are yet to be added. (CVS 2170)
FossilOrigin-Name: e5aa489453bf31126da6473ef93c89ec27935cde
2004-12-19 00:11:35 +00:00
b6c29897eb
Add initial infrastructure for cursors. In where.c, optimize out clauses
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of the form "ORDER BY rowid" if a table scan is being performed. Do a
reverse table scan if "ORDER BY rowid DESC" is present. (CVS 2141)
FossilOrigin-Name: fc8c1393c86017a816beb52725b68af3b973f979
2004-11-22 19:12:19 +00:00
6bf895708c
Update tests to work even if some features of the library are disabled. (CVS 2050)
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FossilOrigin-Name: b11fc9b3f3a2711f98e7e45724aa1d30081197f3
2004-11-03 16:27:01 +00:00
1af3fdb4dc
An improved fix for the min() problem of ticket #800 . (CVS 1804)
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FossilOrigin-Name: b6e8b7a13cd9f90e2f7d963d9ddbe591571f3a27
2004-07-18 21:33:01 +00:00
dc1bdc4f9d
Fix various collation sequence issues. (CVS 1568)
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FossilOrigin-Name: 66835ee67051027456a536e33b2f88a741654525
2004-06-11 10:51:27 +00:00
0202b29ef7
Some progress on user-defined collation sequences. (CVS 1544)
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FossilOrigin-Name: c634e71f1909819fb55c728bc410e5cc390428e3
2004-06-09 09:55:16 +00:00
danielk1977