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35 Commits

Author SHA1 Message Date
drh
589c787620 Chagnes the ESCAPE clause on the LIKE operator to overwrite wildcard 
characters, in order ot match the behavior of PosgreSQL.

FossilOrigin-Name: 11e0844f71e8f2d27ce9363fb505e02fd7795c61dae0b3886cf0d8df4484dd97
 2020-03-19 18:13:28 +00:00
drh
175b8f06f7 Remove support for STAT3. The sqlite_stat3 tables are ignored, if they 
exist.  STAT4 continues to work as it always has, and as it is a superset of
STAT3 is the recommended replacement.

FossilOrigin-Name: 1e17ea2fd1df4ad49138c787c8fe3207dd0c25c93f9001d52a9b69f8c12e841c
 2019-08-08 15:24:17 +00:00
dan
32d0f64e8d Do not attempt the LIKE optimization on a column with numeric affinity if the rhs of the operator begins with whitespace. Fix for ticket [fd76310a5e]. 
FossilOrigin-Name: 94b58ab059cba9771e75f16d1460f313104a8fb879f9f8805725d362aa58cbcd
 2019-06-10 13:46:42 +00:00
drh
9325c87c26 Disable tests for the LIKE optimization when ICU is enabled, since the 
LIKE optimization only works for the built-in LIKE operator and ICU overrides
the built-in.

FossilOrigin-Name: f5ef2e1bcd2790f960c15947f87cda19bd6a6a384ad09b25f6d07d5244cfecbd
 2017-09-27 16:51:00 +00:00
drh
1d42ea71c2 Enhance the like optimization so that it works with an ESCAPE clause. 
FossilOrigin-Name: f5d330f495d07a704e115595bbdf5422ddb68fd8191114c5a12c9c873d983f7c
 2017-07-27 20:24:29 +00:00
dan
cb0d3ba862 Fix another minor problem in test file like.test. 
FossilOrigin-Name: 0953e74612358f48a9c9e3772876b514bc79784f277497121c59302a3106110c
 2017-07-15 08:02:10 +00:00
dan
a50b309187 Fix test problems causing the "prepare" permutation test to fail. 
FossilOrigin-Name: b61cc5a0f9f2c2d2175ad30fc3fa4cb2086dbb948d5a5cc538ac43b871bb5221
 2017-07-15 06:35:15 +00:00
drh
169dd928c5 Add the SQLITE_DBCONFIG_ENABLE_QPSG option to activate the query planner 
stability guarantee.  This involves refactoring the sqlite3.flags bitvector
to carve out a free bit to use.

FossilOrigin-Name: 7076e8283ebae1b45a5d85d9538b49b6da399d38c3c6935de100f948f814f6a9
 2017-06-26 13:57:49 +00:00
drh
7a40707b1f Test cases for the improved LIKE/GLOB matcher. 
FossilOrigin-Name: 0bdb7ae126d3909344640813489ee68ecad041c4
 2016-12-02 02:19:24 +00:00
drh
fb3972602c Case folding in the LIKE operator should look at all bits of the character, 
not just the lower 8 bits.  Fix for ticket [80369eddd5c94].  This is a
back-out of check-in [0a99a8c4facf] with a testcase added.

FossilOrigin-Name: 204432ee72fda8e82d244c4aa18de7ec4811b8e1
 2016-01-20 14:22:41 +00:00
drh
41d2e66ef3 Add the SQLITE_LIKE_DOESNT_MATCH_BLOBS compile-time option. 
FossilOrigin-Name: 9e1d6d4c391ff90077f0d1cdeb567969fee9f747
 2015-12-01 21:23:07 +00:00
drh
a9c18a9067 Test cases added. Comments fixed. Proposed solution for 
ticket [05f43be8fdda9fbd9].

FossilOrigin-Name: 6b993bd54035b67f4d84941e3f444ca79b7feee1
 2015-03-06 20:49:52 +00:00
drh
6ade453cd8 Always use available indices to optimize LIKE operators even if the pattern 
of the LIKE operator has a COLLATE modifier.  This fixes an ineffiency that
was introduced into 3.7.15 by check-in [8542e6180d4] on 2012-12-08.

FossilOrigin-Name: 16bd54783a3f5531c55564ddefdada657c078eb0
 2014-01-16 15:31:41 +00:00
drh
8a4380d761 Fixes to EXPLAIN QUERY PLAN output. Change weights back to something closer 
to what they are in legacy.  More test case fixes.

FossilOrigin-Name: 36373b85f9a97840aa06e24ae31c12fcfbae084e
 2013-06-11 02:32:50 +00:00
drh
7c171098b7 Remove more vestiges of sqlite_query_plan from the test cases. 
FossilOrigin-Name: eb27086e8a8a4d5fcb2ea358256a555e34339423
 2013-06-03 22:08:20 +00:00
drh
3f4d1d1b02 Attempt to use a covering index even on a full table scan, under the theory 
that the index will be smaller and require less disk I/O and thus be faster.

FossilOrigin-Name: cfaa7bc12847a7006ccc93815f2395ad5259744a
 2012-09-15 18:45:54 +00:00
drh
9da058bb5c Use OP_Sort rather than OP_Rewind in order to sort the content of a new 
index on the CREATE INDEX statement.  Add an ALWAYS() to the merge sort
logic to document an unreachable branch.

FossilOrigin-Name: f01766f42342f043bf0cbe1e07224963011f01b7
 2011-08-17 00:40:58 +00:00
drh
c7060c4dc5 Modifications to the "like.test" script in order to expose the problem 
reported by ticket [25ee81271091ec27a8c5].

FossilOrigin-Name: c4db5b640638a211b096454ba90b58faf595392b
 2011-06-26 23:44:35 +00:00
drh
083310dfcc Change the weighting of binary searches on tables to 1/10th the cost of a 
search on an index.  Change the assumed reduction in search space from a
indexed range constraint from 1/3rd to 1/4th.  Do not let the estimated 
number of rows drop below 1.

FossilOrigin-Name: 4847c6cb71423248b186ab7842b97c83e2f5fefd
 2011-01-28 01:57:41 +00:00
dan
6bd2c735fa Changes to test scripts so that they work with SQLITE_ENABLE_ICU. 
FossilOrigin-Name: 465c819fdb601961eddb7304642c823d78111992
 2010-11-01 05:42:26 +00:00
drh
8342e49f62 Enhance the LIKE/GLOB query optimization so that it works as long as there 
is an index with the appropriate collating sequence and even if the default
collating sequence of the column is different.
Ticket [4711020446da7d93d99].

FossilOrigin-Name: 9f932655f9eb9fdab16d7deed98b7cad414e0ca6
 2010-07-22 17:49:52 +00:00
drh
93ee23cc03 Try to optimize LIKE and GLOB operators when RHS contains no wildcard. 
Ticket [e090183531fc274747]

FossilOrigin-Name: 613a87d62fd1f8526d53136efae5adae91824bcf
 2010-07-22 12:33:57 +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
drh
d2cb50b74c Coverage improvements in pragma.c. Change the __DARWIN__ macro to __APPLE__, 
which is available by default on Leopard. (CVS 6153)

FossilOrigin-Name: 64c56226b91e57883c8059f65330318e53376b8a
 2009-01-09 21:41:17 +00:00
drh
5bd98aef66 Fix a bug in the LIKE query optimization. (Found by coverage testing.) (CVS 6137) 
FossilOrigin-Name: fe90e9116b6e1e25cf3119d2777a8e9c135153ce
 2009-01-07 18:24:03 +00:00
drh
e3602be8fd Calling sqlite3_create_function with nArg==(-1) does not override prior 
calls on the same function name with nArg>=0.  Ticket #3345.  Add the
new -argcount option to the "function" method in the TCL interface. (CVS 5684)

FossilOrigin-Name: 5aa5b8044a14f59559c1839dc0799b0d2f990809
 2008-09-09 12:31:33 +00:00
drh
9f504eab49 Fix a bug in the LIKE optimizer that occurs when the last character 
before the wildcard is an upper-case 'Z'.  Ticket #2959. (CVS 4807)

FossilOrigin-Name: 610574b23b5e73b71be71df66e084c5bf37f6ccd
 2008-02-23 21:55:39 +00:00
drh
01495b9921 Improvements to test coverage in the lemon-generated parser and in the 
sqlite3_get_table() interface. (CVS 4745)

FossilOrigin-Name: 9f95d79daeb5e7f6fd62f3c896dae4d332121d1c
 2008-01-23 12:52:40 +00:00
danielk1977
4152e677b8 Fixes for compilation/testing when the various OMIT macros are defined. (CVS 4423) 
FossilOrigin-Name: c8405b15c074c94dab5e33272cf1471f458d11df
 2007-09-12 17:01:45 +00:00
drh
9c86df5269 Fix a bug in the LIKE optimization that was causing the pattern string 
to be dequoted twice.  Ticket #2407. (CVS 4056)

FossilOrigin-Name: abf64d1d0ae3e84c4482b38198eeb44b62cc5d9e
 2007-06-11 12:56:15 +00:00
danielk1977
619a3693a2 Add tests for the new MATCH operator. (CVS 3238) 
FossilOrigin-Name: b4024c394d25e5a0abdb07be779ae41581834c42
 2006-06-14 08:48:25 +00:00
danielk1977
3bdca9c9a5 Test suite fixes for builds that define OMIT symbols. (CVS 2962) 
FossilOrigin-Name: 3a54a33dcb7e765ee3773397407e8929a8cfe1a9
 2006-01-17 09:35:01 +00:00
drh
d64fe2f374 The LIKE optimization does the right thing when collating sequences are 
present.  LIKE expressions where the left-hand side has COLLATE NOCASE
are optimized in the default case. (CVS 2637)

FossilOrigin-Name: ef84ff795c85e9d28f1cac84ff42d8d4ef84cfc4
 2005-08-28 17:00:23 +00:00
drh
8b3d990b71 Bring testing coverage of the analyze.c file up to 100%. Bugs found and 
fixed in the process. (CVS 2599)

FossilOrigin-Name: 2fe0ac4fa4d5911e266979021fa7e413d96c558d
 2005-08-19 00:14:42 +00:00
drh
55ef4d9758 The case_sensitive_like pragma added. 
Test cases added for the LIKE optimization. (CVS 2592)

FossilOrigin-Name: 72ee21c05e618b6f46f5460f8c85779c72fe32d7
 2005-08-14 01:20:37 +00:00