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Overview
| Comment: | Simplification to the logic underlying PRAGMA case_sensitive_like. |
|---|---|
| Downloads: | Tarball | ZIP archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA3-256: |
ef0015fde4c87e992ffd3d7dea858695 |
| User & Date: | drh 2019-05-08 19:32:33.786 |
Context
|
2019-05-08
| ||
| 19:55 | Fix another pattern for which the LIKE optimization does not work for a non-TEXT affinity. Case found by Manuel Rigger. (check-in: 740201107a user: drh tags: trunk) | |
| 19:32 | Simplification to the logic underlying PRAGMA case_sensitive_like. (check-in: ef0015fde4 user: drh tags: trunk) | |
| 19:06 | Avoid an excess register allocation in UPDATE, when possible. This improves speed (slightly) and reduces the code footprint. (check-in: 8658574e3f user: drh tags: trunk) | |
Changes
Changes to src/func.c.
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1791 1792 1793 1794 1795 1796 1797 |
int rc = sqlite3_overload_function(db, "MATCH", 2);
assert( rc==SQLITE_NOMEM || rc==SQLITE_OK );
if( rc==SQLITE_NOMEM ){
sqlite3OomFault(db);
}
}
| < < < < < < < < < < < < < < < > > > | | | 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 |
int rc = sqlite3_overload_function(db, "MATCH", 2);
assert( rc==SQLITE_NOMEM || rc==SQLITE_OK );
if( rc==SQLITE_NOMEM ){
sqlite3OomFault(db);
}
}
/*
** Re-register the built-in LIKE functions. The caseSensitive
** parameter determines whether or not the LIKE operator is case
** sensitive.
*/
void sqlite3RegisterLikeFunctions(sqlite3 *db, int caseSensitive){
struct compareInfo *pInfo;
int flags;
if( caseSensitive ){
pInfo = (struct compareInfo*)&likeInfoAlt;
flags = SQLITE_FUNC_LIKE | SQLITE_FUNC_CASE;
}else{
pInfo = (struct compareInfo*)&likeInfoNorm;
flags = SQLITE_FUNC_LIKE;
}
sqlite3CreateFunc(db, "like", 2, SQLITE_UTF8, pInfo, likeFunc, 0, 0, 0, 0, 0);
sqlite3CreateFunc(db, "like", 3, SQLITE_UTF8, pInfo, likeFunc, 0, 0, 0, 0, 0);
sqlite3FindFunction(db, "like", 2, SQLITE_UTF8, 0)->funcFlags |= flags;
sqlite3FindFunction(db, "like", 3, SQLITE_UTF8, 0)->funcFlags |= flags;
}
/*
** pExpr points to an expression which implements a function. If
** it is appropriate to apply the LIKE optimization to that function
** then set aWc[0] through aWc[2] to the wildcard characters and the
** escape character and then return TRUE. If the function is not a
|
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Changes to test/e_expr.test.
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1009 1010 1011 1012 1013 1014 1015 |
do_test e_expr-15.1.4 { set likeargs } {def abc X}
db close
sqlite3 db test.db
# EVIDENCE-OF: R-22868-25880 The LIKE operator can be made case
# sensitive using the case_sensitive_like pragma.
#
| | > | | > | > | | > | > | 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 |
do_test e_expr-15.1.4 { set likeargs } {def abc X}
db close
sqlite3 db test.db
# EVIDENCE-OF: R-22868-25880 The LIKE operator can be made case
# sensitive using the case_sensitive_like pragma.
#
do_execsql_test e_expr-16.1.1 { SELECT 'abcxyz' LIKE 'ABC%' } 1
do_execsql_test e_expr-16.1.1b { SELECT 'abc%xyz' LIKE 'ABC\%x%' ESCAPE '\' } 1
do_execsql_test e_expr-16.1.2 { PRAGMA case_sensitive_like = 1 } {}
do_execsql_test e_expr-16.1.3 { SELECT 'abcxyz' LIKE 'ABC%' } 0
do_execsql_test e_expr-16.1.3b { SELECT 'abc%xyz' LIKE 'ABC\%X%' ESCAPE '\' } 0
do_execsql_test e_expr-16.1.4 { SELECT 'ABCxyz' LIKE 'ABC%' } 1
do_execsql_test e_expr-16.1.4b { SELECT 'ABC%xyz' LIKE 'ABC\%x%' ESCAPE '\' } 1
do_execsql_test e_expr-16.1.5 { PRAGMA case_sensitive_like = 0 } {}
do_execsql_test e_expr-16.1.6 { SELECT 'abcxyz' LIKE 'ABC%' } 1
do_execsql_test e_expr-16.1.6b { SELECT 'abc%xyz' LIKE 'ABC\%X%' ESCAPE '\' } 1
do_execsql_test e_expr-16.1.7 { SELECT 'ABCxyz' LIKE 'ABC%' } 1
do_execsql_test e_expr-16.1.7b { SELECT 'ABC%xyz' LIKE 'ABC\%X%' ESCAPE '\' } 1
# EVIDENCE-OF: R-52087-12043 The GLOB operator is similar to LIKE but
# uses the Unix file globbing syntax for its wildcards.
#
# EVIDENCE-OF: R-09813-17279 Also, GLOB is case sensitive, unlike LIKE.
#
do_execsql_test e_expr-17.1.1 { SELECT 'abcxyz' GLOB 'abc%' } 0
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