Merge mronstrom@bk-internal.mysql.com:/home/bk/mysql-5.1-new

into  c-870ae253.1238-1-64736c10.cust.bredbandsbolaget.se:/home/pappa/bug19304

mysql-test/r/partition.result

@@ -890,6 +890,10 @@ s1
 2
 3
 drop table t1;
+create table t1 (a int)
+partition by key (a)
+(partition p0 engine = MERGE);
+ERROR HY000: MyISAM Merge handler cannot be used in partitioned tables
 create table t1 (a int) engine=memory
 partition by key(a);
 insert into t1 values (1);

mysql-test/t/partition.test

@@ -1023,6 +1023,14 @@ insert into t1 values (1);
 create index inx1 on t1(a);
 drop table t1;
 
+#
+# BUG 19304 Partitions: MERGE handler not allowed in partitioned tables
+#
+--error ER_PARTITION_MERGE_ERROR
+create table t1 (a int)
+partition by key (a)
+(partition p0 engine = MERGE);
+
 #
 # BUG 19062 Partition clause ignored if CREATE TABLE ... AS SELECT ...;
 #

sql/partition_info.cc

@@ -432,18 +432,22 @@ char *partition_info::has_unique_names()
 bool partition_info::check_engine_mix(handlerton **engine_array, uint no_parts)
 {
   uint i= 0;
-  bool result= FALSE;
   DBUG_ENTER("partition_info::check_engine_mix");
 
   do
   {
     if (engine_array[i] != engine_array[0])
     {
-      result= TRUE;
-      break;
+      my_error(ER_MIX_HANDLER_ERROR, MYF(0));
+      DBUG_RETURN(TRUE);
     }
   } while (++i < no_parts);
-  DBUG_RETURN(result);
+  if (ha_legacy_type(engine_array[0]) == DB_TYPE_MRG_MYISAM)
+  {
+    my_error(ER_PARTITION_MERGE_ERROR, MYF(0));
+    DBUG_RETURN(TRUE);
+  }
+  DBUG_RETURN(FALSE);
 }
 
 
@@ -757,10 +761,7 @@ bool partition_info::check_partition_info(handlerton **eng_type,
     } while (++i < no_parts);
   }
   if (unlikely(partition_info::check_engine_mix(engine_array, part_count)))
-  {
-    my_error(ER_MIX_HANDLER_ERROR, MYF(0));
     goto end;
-  }
 
   if (eng_type)
     *eng_type= (handlerton*)engine_array[0];

sql/share/errmsg.txt

@@ -5846,3 +5846,6 @@ ER_EVENT_MODIFY_QUEUE_ERROR
         eng "Internal scheduler error %d"
 ER_EVENT_SET_VAR_ERROR
         eng "Error during starting/stopping of the scheduler. Error code %u"
+ER_PARTITION_MERGE_ERROR
+        eng "MyISAM Merge handler cannot be used in partitioned tables"
+        swe "MyISAM Merge kan inte anndas i en partitionerad tabell"