Merge siva.hindu.god:/usr/home/tim/m/bk/b20536-41

into  siva.hindu.god:/usr/home/tim/m/bk/41


sql/item_strfunc.cc:
  Auto merged
sql/item_strfunc.h:
  Auto merged
sql/slave.cc:
  Auto merged
sql/sql_acl.cc:
  Auto merged

mysql-test/t/ctype_ucs.test

@@ -463,4 +463,43 @@ INSERT INTO t1 VALUES (1, 'ZZZZZ'), (1, 'ZZZ'), (2, 'ZZZ'), (2, 'ZZZZZ');
 SELECT id, MIN(s) FROM t1 GROUP BY id;
 
 DROP TABLE t1;
-# End of 4.1 tests
+
+#
+# Bug #20536: md5() with GROUP BY and UCS2 return different results on myisam/innodb
+#
+
+--disable_warnings
+drop table if exists bug20536;
+--enable_warnings
+
+set names latin1;
+create table bug20536 (id bigint not null auto_increment primary key, name
+varchar(255) character set ucs2 not null);
+insert into `bug20536` (`id`,`name`) values (1, _latin1 x'74657374311a'), (2, "'test\\_2'");
+select md5(name) from bug20536;
+select sha1(name) from bug20536;
+select make_set(3, name, upper(name)) from bug20536;
+select export_set(5, name, upper(name)) from bug20536;
+select export_set(5, name, upper(name), ",", 5) from bug20536;
+
+# Some broken functions:  add these tests just to document current behavior.
+
+# PASSWORD and OLD_PASSWORD don't work with UCS2 strings, but to fix it would
+# not be backwards compatible in all cases, so it's best to leave it alone
+select password(name) from bug20536;
+select old_password(name) from bug20536;
+
+# ENCRYPT relies on OS function crypt() which takes a NUL-terminated string; it
+# doesn't return good results for strings with embedded 0 bytes.  It won't be
+# fixed unless we choose to re-implement the crypt() function ourselves to take
+# an extra size_t string_length argument.
+select encrypt(name, 'SALT') from bug20536;
+
+# QUOTE doesn't work with UCS2 data.  It would require a total rewrite
+# of Item_func_quote::val_str(), which isn't worthwhile until UCS2 is
+# supported fully as a client character set.
+select quote(name) from bug20536;
+
+drop table bug20536;
+
+--echo End of 4.1 tests