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15 Commits

Author SHA1 Message Date
drh
8210233c7b Revise tests cases to align with the new EXPLAIN QUERY PLAN output. 
FossilOrigin-Name: 50fbd532602d2c316813046ed6be8be2991c281eb5f295c4c28520a0de73862c
 2021-03-20 15:11:29 +00:00
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
91f473b5cc Do not attempt the LIKE optimization for non-text columns and a pattern 
prefix of "-".  Ticket [0f0428096f17252a]

FossilOrigin-Name: 6fe0367f9a337b7c62886b7771f3ce0642faa13f4e4f3d9a0c848abbab514cd0
 2019-09-16 18:19:41 +00:00
drh
060b7fa974 Refactor the LIKE optimization decision logic so that it uses 
sqlite3AtoF() on both boundary keys to determine if the optimization can be
used when the LHS is something that might not have TEXT affinity.
Ticket [ce8717f0885af975].  See also [c94369cae9b561b1],
[b043a54c3de54b28], [fd76310a5e843e07], and [158290c0abafde67].

FossilOrigin-Name: b4a9e09e60213ccff925d09f0b6e549e2a3e3862856c710f108779e2867dec76
 2019-06-14 12:28:21 +00:00
drh
97afa309d7 Fix another pattern for which the LIKE optimization does not work for a 
non-TEXT affinity.  Case found by Manuel Rigger.

FossilOrigin-Name: 740201107ae802c12b678e388ea524db01ad0eb70601c78490ad63eae0fe6cf1
 2019-05-08 19:55:24 +00:00
drh
cf1747b782 The collating sequence of the column must be TEXT if the LIKE or GLOB pattern 
starts with a "+" sign.  This is another case of ticket
[c94369cae9b561b1f996d005] that was discovered by Manuel Rigger.

FossilOrigin-Name: b043a54c3de54b286c4eae564eab6b99118a410d99bdb63480faba3123d2ca11
 2019-05-02 01:41:53 +00:00
dan
db5ba5c385 Omit tests of the LIKE optimization in like3.test when SQLITE_ENABLE_ICU is defined. 
FossilOrigin-Name: af53c41a127c314c0608f3fd016d3a26896783745e46cd180976a188400cdb75
 2019-04-26 17:08:50 +00:00
drh
8e0f794d17 Enable the LIKE optimization when the ESCAPE keyword is present and the 
PRAGMA case_sensitive_like pragma is ON.

FossilOrigin-Name: 6ae4b8c525f446ddb0e0bdd5e4e01e06e2ab975e3effa42fce6a1102b3a39830
 2019-02-27 23:05:14 +00:00
drh
ca9a5faf70 Fix test cases so that they work with ICU. 
FossilOrigin-Name: d04b2013b5436430ebbf7053d637fd89c1b15affcb42787dcf1cf5ffc3ae54e2
 2018-09-28 23:53:24 +00:00
drh
b7a002f836 Fix the LIKE optimization so that it is disabled when the LHS of the 
expression does not have TEXT affinity and the RHS is the pattern '/%'
or the RHS begins with the escape character. Fix for ticket
[c94369cae9b561b1f996d0054b].

FossilOrigin-Name: f191431d63aba187000b5cbaf3e072ff5f1b1eef6a2a407fb4d1629bda4e4e8f
 2018-09-10 12:40:57 +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
560b7c72be New test cases for LIKE and GLOB with BLOB left-hand side values. 
FossilOrigin-Name: 50fa3c5fae90bd3b2f4121e99ab52d79963a6fda
 2015-03-07 12:58:52 +00:00
drh
b7c60ba668 Fix problems with reverse order sorting and indexes in the LIKE optimization. 
FossilOrigin-Name: 564b8fe79475d7584a21078e6098840b8ce6a6e1
 2015-03-07 02:51:59 +00:00
drh
16897072b5 Refactor some jump opcodes in the VDBE. Add JumpZeroIncr and DecrJumpZero. 
Fix the LIKE optimization to work with DESC sort order.

FossilOrigin-Name: 26cb5145bf52f8c3fffa8c69b6c24aee4d974883
 2015-03-07 00:57:37 +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