Bug#13046: LIKE pattern matching using prefix

             index doesn't return correct result
item_cmpfunc.cc:
  Use charset of LIKE to decide whether
  to use 8bit or Unicode "escape" value.
  But use charset of "escape" to scan escape character.
strings/ctype-xxx.c:
  We cannot reduce "end" pointer using charpos(),
  because of possible escape characters in the string.
  Limit the loop using count of written characters instead.
ctype_like_escape.inc:
  new file
mysql-test/t/ctype_xxx:
mysql-test/r/ctype_xxx:
  Adding test case.


strings/ctype-big5.c:
  Bug#13046: LIKE pattern matching using prefix index doesn't return correct result
  We cannot change "end" pointer using charpos(),
  because of possible escape characters.
  Use limit by count of written characters instead.
strings/ctype-cp932.c:
  Bug#13046: LIKE pattern matching using prefix index doesn't return correct
  result
  We cannot change "end" pointer using charpos(),
  because of possible escape characters.
  Use limit by count of written characters instead
strings/ctype-gbk.c:
  Bug#13046: LIKE pattern matching using prefix index doesn't return correct
  result
  We cannot change "end" pointer using charpos(),
  because of possible escape characters.
  Use limit by count of written characters instead
strings/ctype-mb.c:
  Bug#13046: LIKE pattern matching using prefix index doesn't return correct
  result
  We cannot change "end" pointer using charpos(),
  because of possible escape characters.
  Use limit by count of written characters instead
strings/ctype-simple.c:
  Bug#13046: LIKE pattern matching using prefix index doesn't return correct
  result
  We cannot change "end" pointer using charpos(),
  because of possible escape characters.
  Use limit by count of written characters instead
strings/ctype-sjis.c:
  Bug#13046: LIKE pattern matching using prefix index doesn't return correct
  result
  We cannot change "end" pointer using charpos(),
  because of possible escape characters.
  Use limit by count of written characters instead
strings/ctype-tis620.c:
  Bug#13046: LIKE pattern matching using prefix index doesn't return correct
  result
  We cannot change "end" pointer using charpos(),
  because of possible escape characters.
  Use limit by count of written characters instead
strings/ctype-ucs2.c:
  Bug#13046: LIKE pattern matching using prefix index doesn't return correct
  result
  We cannot change "end" pointer using charpos(),
  because of possible escape characters.
  Use limit by count of written characters instead
mysql-test/t/ctype_big5.test:
  Adding test case.
mysql-test/t/ctype_cp932.test:
  Adding test case.
mysql-test/t/ctype_gbk.test:
  Adding test case.
mysql-test/t/ctype_latin1.test:
  Adding test case.
mysql-test/t/ctype_sjis.test:
  Adding test case.
mysql-test/t/ctype_tis620.test:
  Adding test case.
mysql-test/t/ctype_uca.test:
  Adding test case.
mysql-test/t/ctype_ucs.test:
  Adding test case.
mysql-test/t/ctype_ujis.test:
  Adding test case.
mysql-test/t/ctype_utf8.test:
  Adding test case.
mysql-test/r/ctype_big5.result:
  Adding test case.
mysql-test/r/ctype_cp932.result:
  Adding test case.
mysql-test/r/ctype_gbk.result:
  Adding test case.
mysql-test/r/ctype_latin1.result:
  Adding test case.
mysql-test/r/ctype_sjis.result:
  Adding test case.
mysql-test/r/ctype_tis620.result:
  Adding test case.
mysql-test/r/ctype_uca.result:
  Adding test case.
mysql-test/r/ctype_ucs.result:
  Adding test case.
mysql-test/r/ctype_ujis.result:
  Adding test case.
mysql-test/r/ctype_utf8.result:
  Adding test case.
sql/item_cmpfunc.cc:
  More fixes.

1 files changed, 18 insertions, 0 deletions

diff --git a/mysql-test/include/ctype_like_escape.inc b/mysql-test/include/ctype_like_escape.inc
new file mode 100644
index 00000000000..ac97fbaa1a0
--- /dev/null
+++ b/mysql-test/include/ctype_like_escape.inc
@@ -0,0 +1,18 @@
+#
+# Bugs: #13046:
+# LIKE pattern matching using prefix index doesn't return correct result
+#
+select @@collation_connection;
+create table t1 ROW_FORMAT=DYNAMIC select repeat('a',50) as c1 ;
+insert into t1 values('abcdef');
+insert into t1 values('_bcdef');
+insert into t1 values('a_cdef');
+insert into t1 values('ab_def');
+insert into t1 values('abc_ef');
+insert into t1 values('abcd_f');
+insert into t1 values('abcde_');
+-- should return ab_def
+select c1 as c1u from t1 where c1 like 'ab\_def';
+-- should return ab_def
+select c1 as c2h from t1 where c1 like 'ab#_def' escape '#';
+drop table t1;