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15 Commits

Author SHA1 Message Date
dan
4bc39fa188 Change the EXPLAIN QUERY PLAN output to use "USING INDEX" instead of "BY INDEX", and to use "SEARCH" instead of "SCAN" for loops that are not full-table scans. 
FossilOrigin-Name: 6611b76b0296875fb9903b25dfaa783a9c12eaa1
 2010-11-13 16:42:27 +00:00
dan
acf1987d18 Fix a bug in the EXPLAIN QUERY PLAN code. 
FossilOrigin-Name: 7ae068952fba4395b4aa437613a5ed2bd9ddf941
 2010-11-11 11:43:01 +00:00
dan
47eb16d4ce Modifications to test cases to account for new EXPLAIN QUERY PLAN output. 
FossilOrigin-Name: 30904ef8412348464e893e9e1551ef22cad24a3e
 2010-11-11 10:36:25 +00:00
drh
020efb1666 Add new WHERETRACE macros for better diagnostics of the query planner. 
Added a new test case for the performance regression fixed by the previous
check-in.

FossilOrigin-Name: 1e0db99797be2821716de7138931ebd5cf8fa63b
 2010-10-21 03:13:58 +00:00
drh
ed754ce2cc Further refinements to table order selection on join query planning. 
FossilOrigin-Name: defaf0d99a807027f8883bf821b6482025f9f54e
 2010-04-15 01:04:54 +00:00
drh
98cdf62690 Continuing refinements of the range-scan optimizations in where.c. 
The range scores are changed from an integer 1..9 to 0..100.

FossilOrigin-Name: f0c24b5fb86940f1a88adfb39cc4b9cbfcc66f8a
 2009-08-20 18:14:42 +00:00
drh
c4ac22e905 Disable the LIKE optimization if the affinity of the LHS column is 
not TEXT.  Ticket #3901. (CVS 6727)

FossilOrigin-Name: a255c645c46ae03b65f862858fe57e462076e1fc
 2009-06-07 23:45:10 +00:00
danielk1977
1d46146b58 Attempt to optimize virtual table queries with 'OR' expressions in the WHERE clause. (CVS 6527) 
FossilOrigin-Name: f61e4cd93682fd98bea2a71d346f9eaa68454390
 2009-04-21 09:02:45 +00:00
drh
a7e770612b Make sure the OR-clause optimizer takes the cost of sorting into account. 
Reset the rowid cache on the OP_Rewind and OP_Last opcodes.  Bump the
version number so that we can do an emergency release.  Ticket #3581. (CVS 6173)

FossilOrigin-Name: d28b58209bf5eb575d0cad8dc71ac043395c6471
 2009-01-14 00:55:09 +00:00
drh
04bbcd5ce9 Fix a bug in the multi-index OR cost estimator. Remove leftover "breakpoint" 
commands from test scripts. (CVS 6086)

FossilOrigin-Name: b090d5736d7eaec17a39d3133e1587b1d2a42acb
 2008-12-30 17:55:00 +00:00
drh
239080fbd5 Still more test cases in where7.test. (CVS 6080) 
FossilOrigin-Name: eb9ba5fe70df56ee00828f7dbaf71ae6f825737d
 2008-12-30 14:40:06 +00:00
drh
1cfdce1c45 Add many new test cases to where7.test. (CVS 6079) 
FossilOrigin-Name: 174985831f9c8f5c393556d3248b01852573abc7
 2008-12-30 14:14:03 +00:00
drh
ca8c4667a8 Multi-index OR optimizer response to ORDER BY rowid. 
But fix in sqlite3_stmt_status(): report a full table scan
when "ORDER BY rowid" is used without constraints. (CVS 6069)

FossilOrigin-Name: 3464d369d3b6899ec726cf5b42b68b1dac2ba982
 2008-12-28 20:47:02 +00:00
drh
294352578e Optimize WHERE clauses that constain AND, BETWEEN, and LIKE terms as operands 
of an OR. (CVS 6068)

FossilOrigin-Name: 67cf24b30e087796cfb0fccf47328e72ade5ecdc
 2008-12-28 18:35:08 +00:00
drh
23d04d5a20 Continuing improvements to the multi-index OR-clause optimizer. Added a 
few simple test cases. (CVS 6062)

FossilOrigin-Name: 55d4f493e7df8515574a75caec9967d6c71b6012
 2008-12-23 23:56:22 +00:00