Bug #6737: REGEXP gives wrong result with case sensitive collation:

- A new flag MY_CS_CSSORT was introduced for case sensitivity.
- Item_func_regexp doesn't substiture ICASE not only
  for binary collations but for case sensitive collations as well. 

2 files changed, 16 insertions, 0 deletions

diff --git a/mysql-test/r/ctype_latin1.result b/mysql-test/r/ctype_latin1.result
index a8182438ac4..355f53b63a5 100644
--- a/mysql-test/r/ctype_latin1.result
+++ b/mysql-test/r/ctype_latin1.result
@@ -296,3 +296,12 @@ FD	C3BD	FD	1
 FE	C3BE	FE	1
 FF	C3BF	FF	1
 DROP TABLE t1;
+select 'a' regexp 'A' collate latin1_general_ci;
+'a' regexp 'A' collate latin1_general_ci
+1
+select 'a' regexp 'A' collate latin1_general_cs;
+'a' regexp 'A' collate latin1_general_cs
+0
+select 'a' regexp 'A' collate latin1_bin;
+'a' regexp 'A' collate latin1_bin
+0
diff --git a/mysql-test/t/ctype_latin1.test b/mysql-test/t/ctype_latin1.test
index 14062437428..677acd9faa9 100644
--- a/mysql-test/t/ctype_latin1.test
+++ b/mysql-test/t/ctype_latin1.test
@@ -53,3 +53,10 @@ SELECT
   hex(@l:=convert(@u using latin1)),
   a=@l FROM t1;
 DROP TABLE t1;
+
+#
+# Bug #6737: REGEXP gives wrong result with case sensitive collation
+#
+select 'a' regexp 'A' collate latin1_general_ci;
+select 'a' regexp 'A' collate latin1_general_cs;
+select 'a' regexp 'A' collate latin1_bin;