Artifact b065d1ca38c03dd76caae1d4cc84ed3d6eb3f64b3ff6b0dfad6413a7b406cca4:

• File test/like3.test — part of check-in [b043a54c] at 2019-05-02 01:41:53 on branch trunk — The "LIKE Optimization" (which converts a LIKE into a BETWEEN operator that is able to use an index) does not work and cannot be used if the collating sequence of the column is not TEXT and if the pattern starts with a "+" sign. This is another case of ticket [c94369cae9b561b1f996d005]. The new test case was discovered by Manuel Rigger. (user: drh size: 7430) [more...]

# 2015-03-06
#
# The author disclaims copyright to this source code.  In place of
# a legal notice, here is a blessing:
#
#    May you do good and not evil.
#    May you find forgiveness for yourself and forgive others.
#    May you share freely, never taking more than you give.
#
#***********************************************************************
#
# This file implements regression tests for SQLite library.  The
# focus of this file is testing the LIKE and GLOB operators and
# in particular the optimizations that occur to help those operators
# run faster and that those optimizations work correctly when there
# are both strings and blobs being tested.
#
# Ticket 05f43be8fdda9fbd948d374319b99b054140bc36 shows that the following
# SQL was not working correctly:
#
#     CREATE TABLE t1(x TEXT UNIQUE COLLATE nocase);
#     INSERT INTO t1(x) VALUES(x'616263');
#     SELECT 'query-1', x FROM t1 WHERE x LIKE 'a%';
#     SELECT 'query-2', x FROM t1 WHERE +x LIKE 'a%';
#
# This script verifies that it works right now.
#

set testdir [file dirname $argv0]
source $testdir/tester.tcl

ifcapable !like_match_blobs {
  finish_test
  return
}

do_execsql_test like3-1.1 {
  PRAGMA encoding=UTF8;
  CREATE TABLE t1(a,b TEXT COLLATE nocase);
  INSERT INTO t1(a,b)
     VALUES(1,'abc'),
           (2,'ABX'),
           (3,'BCD'),
           (4,x'616263'),
           (5,x'414258'),
           (6,x'424344');
  CREATE INDEX t1ba ON t1(b,a);

  SELECT a, b FROM t1 WHERE b LIKE 'aB%' ORDER BY +a;
} {1 abc 2 ABX 4 abc 5 ABX}
do_execsql_test like3-1.2 {
  SELECT a, b FROM t1 WHERE +b LIKE 'aB%' ORDER BY +a;
} {1 abc 2 ABX 4 abc 5 ABX}

do_execsql_test like3-2.0 {
  CREATE TABLE t2(a, b TEXT);
  INSERT INTO t2 SELECT a, b FROM t1;
  CREATE INDEX t2ba ON t2(b,a);
  SELECT a, b FROM t2 WHERE b GLOB 'ab*' ORDER BY +a;
} {1 abc 4 abc}
do_execsql_test like3-2.1 {
  SELECT a, b FROM t2 WHERE +b GLOB 'ab*' ORDER BY +a;
} {1 abc 4 abc}
do_execsql_test like3-2.2 {
  SELECT a, b FROM t2 WHERE b>=x'6162' AND b GLOB 'ab*'
} {4 abc}
do_execsql_test like3-2.3 {
  SELECT a, b FROM t2 WHERE +b>=x'6162' AND +b GLOB 'ab*'
} {4 abc}
do_execsql_test like3-2.4 {
  SELECT a, b FROM t2 WHERE b GLOB 'ab*' AND b>=x'6162'
} {4 abc}
do_execsql_test like3-2.5 {
  SELECT a, b FROM t2 WHERE +b GLOB 'ab*' AND +b>=x'6162'
} {4 abc}

do_execsql_test like3-3.0 {
  CREATE TABLE t3(x TEXT PRIMARY KEY COLLATE nocase);
  INSERT INTO t3(x) VALUES('aaa'),('abc'),('abd'),('abe'),('acz');
  INSERT INTO t3(x) SELECT CAST(x AS blob) FROM t3;
  SELECT quote(x) FROM t3 WHERE x LIKE 'ab%' ORDER BY x;
} {'abc' 'abd' 'abe' X'616263' X'616264' X'616265'}
do_execsql_test like3-3.1 {
  SELECT quote(x) FROM t3 WHERE x LIKE 'ab%' ORDER BY x DESC;
} {X'616265' X'616264' X'616263' 'abe' 'abd' 'abc'}
do_execsql_test like3-3.1ck {
  SELECT quote(x) FROM t3 WHERE x LIKE 'ab%' ORDER BY +x DESC;
} {X'616265' X'616264' X'616263' 'abe' 'abd' 'abc'}
do_execsql_test like3-3.2 {
  SELECT quote(x) FROM t3 WHERE x LIKE 'ab%' ORDER BY x ASC;
} {'abc' 'abd' 'abe' X'616263' X'616264' X'616265'}
do_execsql_test like3-3.2ck {
  SELECT quote(x) FROM t3 WHERE x LIKE 'ab%' ORDER BY +x ASC;
} {'abc' 'abd' 'abe' X'616263' X'616264' X'616265'}

do_execsql_test like3-4.0 {
  CREATE TABLE t4(x TEXT COLLATE nocase);
  CREATE INDEX t4x ON t4(x DESC);
  INSERT INTO t4(x) SELECT x FROM t3;
  SELECT quote(x) FROM t4 WHERE x LIKE 'ab%' ORDER BY x;
} {'abc' 'abd' 'abe' X'616263' X'616264' X'616265'}
do_execsql_test like3-4.1 {
  SELECT quote(x) FROM t4 WHERE x LIKE 'ab%' ORDER BY x DESC;
} {X'616265' X'616264' X'616263' 'abe' 'abd' 'abc'}
do_execsql_test like3-4.1ck {
  SELECT quote(x) FROM t4 WHERE x LIKE 'ab%' ORDER BY +x DESC;
} {X'616265' X'616264' X'616263' 'abe' 'abd' 'abc'}
do_execsql_test like3-4.2 {
  SELECT quote(x) FROM t4 WHERE x LIKE 'ab%' ORDER BY x ASC;
} {'abc' 'abd' 'abe' X'616263' X'616264' X'616265'}
do_execsql_test like3-4.2ck {
  SELECT quote(x) FROM t4 WHERE x LIKE 'ab%' ORDER BY +x ASC;
} {'abc' 'abd' 'abe' X'616263' X'616264' X'616265'}

# 2018-09-10 ticket https://www.sqlite.org/src/tktview/c94369cae9b561b1f996
# The like optimization fails for a column with numeric affinity if
# the pattern '/%' or begins with the escape character.
#
do_execsql_test like3-5.100 {
  CREATE TABLE t5a(x INT UNIQUE COLLATE nocase);
  INSERT INTO t5a(x) VALUES('/abc'),(123),(-234);
  SELECT x FROM t5a WHERE x LIKE '/%';
} {/abc}
do_eqp_test like3-5.101 {
  SELECT x FROM t5a WHERE x LIKE '/%';
} {
  QUERY PLAN
  `--SCAN TABLE t5a
}
do_execsql_test like3-5.110 {
  SELECT x FROM t5a WHERE x LIKE '/a%';
} {/abc}
ifcapable !icu {
do_eqp_test like3-5.111 {
  SELECT x FROM t5a WHERE x LIKE '/a%';
} {
  QUERY PLAN
  `--SEARCH TABLE t5a USING COVERING INDEX sqlite_autoindex_t5a_1 (x>? AND x<?)
}
}
do_execsql_test like3-5.120 {
  SELECT x FROM t5a WHERE x LIKE '^12%' ESCAPE '^';
} {123}
do_eqp_test like3-5.121 {
  SELECT x FROM t5a WHERE x LIKE '^12%' ESCAPE '^';
} {
  QUERY PLAN
  `--SCAN TABLE t5a
}
do_execsql_test like3-5.122 {
  SELECT x FROM t5a WHERE x LIKE '^-2%' ESCAPE '^';
} {-234}
do_eqp_test like3-5.123 {
  SELECT x FROM t5a WHERE x LIKE '^12%' ESCAPE '^';
} {
  QUERY PLAN
  `--SCAN TABLE t5a
}

do_execsql_test like3-5.200 {
  CREATE TABLE t5b(x INT UNIQUE COLLATE binary);
  INSERT INTO t5b(x) VALUES('/abc'),(123),(-234);
  SELECT x FROM t5b WHERE x GLOB '/*';
} {/abc}
do_eqp_test like3-5.201 {
  SELECT x FROM t5b WHERE x GLOB '/*';
} {
  QUERY PLAN
  `--SCAN TABLE t5b
}
do_execsql_test like3-5.210 {
  SELECT x FROM t5b WHERE x GLOB '/a*';
} {/abc}
do_eqp_test like3-5.211 {
  SELECT x FROM t5b WHERE x GLOB '/a*';
} {
  QUERY PLAN
  `--SEARCH TABLE t5b USING COVERING INDEX sqlite_autoindex_t5b_1 (x>? AND x<?)
}

# 2019-05-01
# another case of the above reported on the mailing list by Manual Rigger.
#
do_execsql_test like3-5.300 {
  CREATE TABLE t5c (c0 REAL);
  CREATE INDEX t5c_0 ON t5c(c0 COLLATE NOCASE);
  INSERT INTO t5c(rowid, c0) VALUES (99,'+/');
  SELECT * FROM t5c WHERE (c0 LIKE '+/');
} {+/}

# 2019-02-27
# Verify that the LIKE optimization works with an ESCAPE clause when
# using PRAGMA case_sensitive_like=ON.
#
ifcapable !icu {
do_execsql_test like3-6.100 {
  DROP TABLE IF EXISTS t1;
  CREATE TABLE t1(path TEXT COLLATE nocase PRIMARY KEY,a,b,c) WITHOUT ROWID;
}
do_eqp_test like3-6.110 {
  SELECT * FROM t1 WHERE path LIKE 'a%';
} {
  QUERY PLAN
  `--SEARCH TABLE t1 USING PRIMARY KEY (path>? AND path<?)
}
do_eqp_test like3-6.120 {
  SELECT * FROM t1 WHERE path LIKE 'a%' ESCAPE '_';
} {
  QUERY PLAN
  `--SEARCH TABLE t1 USING PRIMARY KEY (path>? AND path<?)
}
do_execsql_test like3-6.200 {
  DROP TABLE IF EXISTS t2;
  CREATE TABLE t2(path TEXT,x,y,z);
  CREATE INDEX t2path ON t2(path COLLATE nocase);
  CREATE INDEX t2path2 ON t2(path);
}
do_eqp_test like3-6.210 {
  SELECT * FROM t2 WHERE path LIKE 'a%';
} {
  QUERY PLAN
  `--SEARCH TABLE t2 USING INDEX t2path (path>? AND path<?)
}
do_eqp_test like3-6.220 {
  SELECT * FROM t2 WHERE path LIKE 'a%' ESCAPE '_';
} {
  QUERY PLAN
  `--SEARCH TABLE t2 USING INDEX t2path (path>? AND path<?)
}
db eval {PRAGMA case_sensitive_like=ON}
do_eqp_test like3-6.230 {
  SELECT * FROM t2 WHERE path LIKE 'a%';
} {
  QUERY PLAN
  `--SEARCH TABLE t2 USING INDEX t2path2 (path>? AND path<?)
}
do_eqp_test like3-6.240 {
  SELECT * FROM t2 WHERE path LIKE 'a%' ESCAPE '_';
} {
  QUERY PLAN
  `--SEARCH TABLE t2 USING INDEX t2path2 (path>? AND path<?)
}
}

finish_test