Add an index on serialization_tag column.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@19441 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/CMFActivity/skins/activity/SQLDict_createMessageTable.zsql

@@ -28,6 +28,7 @@ CREATE TABLE `message` (
   KEY (`method_id`),
   KEY `processing_node_processing` (`processing_node`, `processing`),
   KEY `processing_node_date` (`processing_node`, `date`),
+  KEY `processing_node_serialization_tag` (`processing_node`, `serialization_tag`),
   KEY (`priority`),
   KEY (`tag`),
   KEY (`order_validation_text`)

product/CMFActivity/skins/activity/SQLQueue_createMessageTable.zsql

@@ -25,6 +25,7 @@ CREATE TABLE `message_queue` (
   KEY (`method_id`),
   KEY `processing_node_processing` (`processing_node`, `processing`),
   KEY `processing_node_date` (`processing_node`, `date`),
+  KEY `processing_node_serialization_tag` (`processing_node`, `serialization_tag`),
   KEY (`priority`),
   KEY (`tag`)
 ) TYPE = InnoDB;