Merge naruto.:C:/cpp/bug20789/my50-bug20789

into  naruto.:C:/cpp/mysql-5.0-maint

myisam/mi_locking.c

@@ -223,18 +223,7 @@ int mi_lock_database(MI_INFO *info, int lock_type)
     default:
       break;				/* Impossible */
     }
-  } 
-#ifdef __WIN__
-  else
-  {
-    /*
-      The file has been closed and kfile is -1.
-      See mi_extra.c about implementation of
-      HA_EXTRA_PREPARE_FOR_DELETE.
-    */
-    error=HA_ERR_NO_SUCH_TABLE;
   }
-#endif
   pthread_mutex_unlock(&share->intern_lock);
 #if defined(FULL_LOG) || defined(_lint)
   lock_type|=(int) (flag << 8);		/* Set bit to set if real lock */

mysql-test/r/windows.result

@@ -6,31 +6,3 @@ use prn;
 ERROR 42000: Unknown database 'prn'
 create table nu (a int);
 drop table nu;
-CREATE TABLE `t1` (
-`TIM` datetime NOT NULL,
-`VAL` double default NULL
-) ENGINE=MyISAM DEFAULT CHARSET=latin1;
-CREATE TABLE `t2` (
-`TIM` datetime NOT NULL,
-`VAL` double default NULL
-) ENGINE=MyISAM DEFAULT CHARSET=latin1;
-CREATE TABLE `mt` (
-`TIM` datetime NOT NULL,
-`VAL` double default NULL
-) ENGINE=MRG_MyISAM DEFAULT CHARSET=latin1 INSERT_METHOD=LAST
-UNION=(`t1`,`t2`);
-INSERT INTO mt VALUES ('2006-01-01',0);
-ALTER TABLE `t2` RENAME TO `t`;
-INSERT INTO mt VALUES ('2006-01-01',0);
-ERROR HY000: Can't lock file (errno: 155)
-select * from mt;
-ERROR HY000: Can't lock file (errno: 155)
-FLUSH TABLES;
-select * from mt;
-ERROR HY000: Can't find file: 'mt' (errno: 2)
-ALTER TABLE `t` RENAME TO `t2`;
-INSERT INTO mt VALUES ('2006-01-01',0);
-select * from mt;
-TIM	VAL
-2006-01-01 00:00:00	0
-2006-01-01 00:00:00	0

mysql-test/t/windows.test

@@ -18,42 +18,3 @@ create table nu (a int);
 drop table nu;
 
 # End of 4.1 tests
-
-#
-# Bug #20789: Merge Subtable Rename Causes Crash
-#
-CREATE TABLE `t1` (
-  `TIM` datetime NOT NULL,
-  `VAL` double default NULL
-) ENGINE=MyISAM DEFAULT CHARSET=latin1;
-CREATE TABLE `t2` (
-  `TIM` datetime NOT NULL,
-  `VAL` double default NULL
-) ENGINE=MyISAM DEFAULT CHARSET=latin1;
-CREATE TABLE `mt` (
-  `TIM` datetime NOT NULL,
-  `VAL` double default NULL
-) ENGINE=MRG_MyISAM DEFAULT CHARSET=latin1 INSERT_METHOD=LAST
-UNION=(`t1`,`t2`);
-
-# insert into the merge table and thus open it.
-INSERT INTO mt VALUES ('2006-01-01',0);
-
-# Alter one of the tables that are part of the merge table
-ALTER TABLE `t2` RENAME TO `t`;
-
-# Insert into the merge table that has just been altered
---error 1015
-INSERT INTO mt VALUES ('2006-01-01',0); 
---error 1015
-select * from mt;
-
-FLUSH TABLES;
---error 1017
-select * from mt;
-
-# Alter one of the tables that are part of the merge table
-ALTER TABLE `t` RENAME TO `t2`;
-INSERT INTO mt VALUES ('2006-01-01',0);
-select * from mt; 
-