Add index to log table

configuration/etl/etl.d/xdmod-migration-8_5_1-9_0_0.json

@@ -71,6 +71,24 @@
                 }
             }
         },
+        {
+            "name": "update-mod_logger-log_table-table",
+            "description": "Update mod_logger.log_table table",
+            "namespace": "ETL\\Maintenance",
+            "class": "ExecuteSql",
+            "options_class": "MaintenanceOptions",
+            "sql_file_list": [
+                "migrations/8.5.1-9.0.0/logger/alter-log-table.sql"
+            ],
+            "endpoints": {
+                "destination": {
+                    "type": "mysql",
+                    "name": "Logger Database",
+                    "config": "logger",
+                    "schema": "mod_logger"
+                }
+            }
+        },
         {
             "name": "OpenStackDomainToSubmissionVenueMappingStagingIngestor",
             "description": "Load schema version history",

configuration/etl/etl_sql.d/migrations/8.5.1-9.0.0/logger/alter-log-table.sql

@@ -0,0 +1,24 @@
+-- Add index to the `log_table` table.  This table is not managed by an ETL
+-- definition.
+
+-- Wrap the ALTER TABLE statement in a prepared statement that conditionally
+-- add the column so that this file can be executed multiple times without
+-- causing errors.
+SET @statement = (
+    SELECT IF(
+        (
+            SELECT COUNT(*) FROM information_schema.statistics
+            WHERE table_schema = '${DESTINATION_SCHEMA}'
+                AND table_name = 'log_table'
+                AND index_name = 'get_messages_idx'
+        ) > 0,
+        'SELECT 1',
+        CONCAT(
+            'ALTER TABLE `${DESTINATION_SCHEMA}`.`log_table` ',
+            'ADD INDEX `get_messages_idx` (`ident`,`logtime`,`priority`)'
+        )
+    )
+)//
+PREPARE addIndexIfNotExists FROM @statement//
+EXECUTE addIndexIfNotExists//
+DEALLOCATE PREPARE addIndexIfNotExists//

db/schema/mod_logger.sql

@@ -39,7 +39,8 @@ CREATE TABLE `log_table` (
   KEY `unique_id_idx` (`id`),
   KEY `ident_idx` (`ident`),
   KEY `priority_idx` (`priority`),
-  KEY `logscan` (`ident`,`priority`,`id`)
+  KEY `logscan` (`ident`,`priority`,`id`),
+  KEY `get_messages_idx` (`ident`,`logtime`,`priority`)
 ) ENGINE=MyISAM DEFAULT CHARSET=latin1;
 /*!40101 SET character_set_client = @saved_cs_client */;
 DROP TABLE IF EXISTS `schema_version_history`;