drh
aa32e3c60a
Enhance the query planner so that it looks at multiple solutions to OR
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expressions in the WHERE clause.
FossilOrigin-Name: 5e19d054105fb16ff52d265d48cc87a418603f6f
2013-07-16 21:31:23 +00:00
drh
fd5874d23d
Add the "queryplanner" test permutation. Continuing refinements to NGQP.
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FossilOrigin-Name: 25e2cde105a19293bdb9c001b48624e5d7f8c4e5
2013-06-12 14:52:39 +00:00
dan
4c5aeecc90
Fix minor test script issues causing releasetest.tcl to fail.
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FossilOrigin-Name: d8ded9d8a1052885ce223c70efa55c0dd8b9920e
2013-05-16 19:15:07 +00:00
drh
3c449c6b6b
Make sure extra parentheses around subqueries in the FROM clause are harmless.
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Ticket [28c6e830f239ea5].
FossilOrigin-Name: 1c79569226db3d5a73e65a35877635ea8b478866
2013-04-30 14:06:57 +00:00
drh
832ee3d4cc
Optimize the degenerate case of a FROM clause table name enclosed all by
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itself inside parentheses. Generate code as if the parentheses did not
exist, rather than the old behavior of manifesting the parenthesized table
into a transient table. Also, tag every FROM-clause SELECT subquery that is
generated by a parenthesized FROM-clause expression using the SF_NestedFrom
flag. The new SF_NestedFrom flag is not yet used for anything.
FossilOrigin-Name: 7fecced466d86a66b0b751c5b5608141e134fe2d
2012-12-18 19:36:11 +00:00
drh
ed754ce2cc
Further refinements to table order selection on join query planning.
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FossilOrigin-Name: defaf0d99a807027f8883bf821b6482025f9f54e
2010-04-15 01:04:54 +00:00
drh
c01a3c1775
Ensure WHERE clause terms involving tables on the right end of a join
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are not prematurely evaluated when tables on the left end of the join
make use of the OR-clause optimization.
Fix for ticket [31338dca7e].
FossilOrigin-Name: 2c2de252666662f5459904fc33a9f2956cbff23c
2009-12-16 22:10:49 +00:00
drh
9f3962e7b5
Make sure a variable is cleared before use in the where8.test script.
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FossilOrigin-Name: b34365296d65310bb015901d18ed463e73d47cbe
2009-12-02 02:49:49 +00:00
dan
5236ac1d04
Changes to the query planner that improve the order in which tables/indexes are scanned in join queries.
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FossilOrigin-Name: 19f799b32f9d1be25d4185ce18b13f4dd502e199
2009-08-13 07:09:33 +00:00
danielk1977
f51d1bd665
Fix a bug in where.c that could cause SQLite to write to freed memory while compiling a query with many terms in the WHERE clause. (CVS 6952)
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FossilOrigin-Name: 8161af840e8fd2b06457e75023f934e1b8fe5fd6
2009-07-31 06:14:51 +00:00
drh
c4ac22e905
Disable the LIKE optimization if the affinity of the LHS column is
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not TEXT. Ticket #3901 . (CVS 6727)
FossilOrigin-Name: a255c645c46ae03b65f862858fe57e462076e1fc
2009-06-07 23:45:10 +00:00
drh
dda70fe38e
Remove leftover "breakpoint" commands from test scripts. Also remove blank
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lines at the end of scripts. (CVS 6721)
FossilOrigin-Name: 1fef16ec2b89981770cf44f606a420fbe031a7a4
2009-06-05 17:09:11 +00:00
danielk1977
1d46146b58
Attempt to optimize virtual table queries with 'OR' expressions in the WHERE clause. (CVS 6527)
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FossilOrigin-Name: f61e4cd93682fd98bea2a71d346f9eaa68454390
2009-04-21 09:02:45 +00:00
danielk1977
13da67e5aa
Add further pseudo-randomly generated test cases to where8.test. (CVS 6083)
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FossilOrigin-Name: e01f6ef9d981d50a70c05edc4ef8135dbc473ba1
2008-12-30 16:13:04 +00:00
danielk1977
c1071e53e7
Fix a bug in where8.test causing a tcl exception. (CVS 6082)
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FossilOrigin-Name: 495b569a3921042c36667a415c1353201760fa17
2008-12-30 15:51:40 +00:00
danielk1977
9357416a25
Add a few more tests to where8.test. (CVS 6081)
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FossilOrigin-Name: ac28aa8b618d59628c5b8fc6fe649ec14f554b11
2008-12-30 15:26:29 +00:00
danielk1977
5f0ff5d527
Add a couple of extra tests for the "WHERE ... OR" optimization. (CVS 6077)
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FossilOrigin-Name: 35c87585b81866e73a58adffe6af79ddcac57cf6
2008-12-30 12:00:12 +00:00
danielk1977
fdc4019b46
Add test file where8.test. (CVS 6072)
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FossilOrigin-Name: bff460ec2c3e250de034a6b34312b897bb2f3749
2008-12-29 18:33:32 +00:00
