Merge mysql.com:/home/alexi/mysql-5.0

into  mysql.com:/home/alexi/dev/mysql-5.0-1

mysql-test/lib/mtr_process.pl

@@ -752,6 +752,7 @@ sub mtr_ping_mysqld_server () {
 #
 ##############################################################################
 
+# FIXME check that the pidfile contains the expected pid!
 
 sub sleep_until_file_created ($$$) {
   my $pidfile= shift;
@@ -762,7 +763,7 @@ sub sleep_until_file_created ($$$) {
   {
     if ( -r $pidfile )
     {
-      return 1;
+      return $pid;
     }
 
     # Check if it died after the fork() was successful 

mysql-test/r/select.result

@@ -2739,3 +2739,14 @@ DROP TABLE t1,t2;
 select x'10' + 0, X'10' + 0, b'10' + 0, B'10' + 0;
 x'10' + 0	X'10' + 0	b'10' + 0	B'10' + 0
 16	16	2	2
+CREATE TABLE BUG_12595(a varchar(100));
+INSERT INTO BUG_12595 VALUES ('hakan%'), ('hakank'), ("ha%an");
+SELECT * FROM BUG_12595 WHERE a LIKE 'hakan*%' ESCAPE '*';
+a
+hakan%
+SELECT * FROM BUG_12595 WHERE a LIKE 'hakan**%' ESCAPE '**';
+ERROR HY000: Incorrect arguments to ESCAPE
+SELECT * FROM BUG_12595 WHERE a LIKE 'ha%%an' ESCAPE '%';
+a
+ha%an
+DROP TABLE BUG_12595;

mysql-test/t/select.test

@@ -2350,3 +2350,14 @@ DROP TABLE t1,t2;
 #
 
 select x'10' + 0, X'10' + 0, b'10' + 0, B'10' + 0;
+
+#
+# BUG #12595
+#
+CREATE TABLE BUG_12595(a varchar(100));
+INSERT INTO BUG_12595 VALUES ('hakan%'), ('hakank'), ("ha%an");
+SELECT * FROM BUG_12595 WHERE a LIKE 'hakan*%' ESCAPE '*';
+-- error 1210
+SELECT * FROM BUG_12595 WHERE a LIKE 'hakan**%' ESCAPE '**';
+SELECT * FROM BUG_12595 WHERE a LIKE 'ha%%an' ESCAPE '%';
+DROP TABLE BUG_12595;

sql/item_cmpfunc.cc

@@ -2792,8 +2792,14 @@ bool Item_func_like::fix_fields(THD *thd, Item **ref)
   {
     /* If we are on execution stage */
     String *escape_str= escape_item->val_str(&tmp_value1);
+    /* ESCAPE must be 1 char in length.*/
+    if (escape_str && escape_str->numchars() != 1)
+    {
+      my_error(ER_WRONG_ARGUMENTS,MYF(0),"ESCAPE");
+      return TRUE;
+    }
     escape= escape_str ? *(escape_str->ptr()) : '\\';
- 
+
     /*
       We could also do boyer-more for non-const items, but as we would have to
       recompute the tables for each row it's not worth it.