schema: add index on deployment log startup time

fixes #2551

schema/mysql-migrations/upgrade_179.sql

@@ -0,0 +1,5 @@
+ALTER TABLE director_deployment_log ADD INDEX (start_time);
+
+INSERT INTO director_schema_migration
+  (schema_version, migration_time)
+  VALUES ('179', NOW());

schema/mysql.sql

@@ -167,6 +167,7 @@ CREATE TABLE director_deployment_log (
   username VARCHAR(64) DEFAULT NULL COMMENT 'The user that triggered this deployment',
   startup_log MEDIUMTEXT DEFAULT NULL,
   PRIMARY KEY (id),
+  INDEX (start_time),
   CONSTRAINT config_checksum
     FOREIGN KEY config_checksum (config_checksum)
     REFERENCES director_generated_config (checksum)
@@ -2414,4 +2415,4 @@ CREATE TABLE branched_icinga_dependency (
 
 INSERT INTO director_schema_migration
   (schema_version, migration_time)
-  VALUES (178, NOW());
+  VALUES (179, NOW());

schema/pgsql-migrations/upgrade_179.sql

@@ -0,0 +1,5 @@
+CREATE INDEX start_time_idx ON director_deployment_log (start_time);
+
+INSERT INTO director_schema_migration
+  (schema_version, migration_time)
+  VALUES (179, NOW());

schema/pgsql.sql

@@ -241,6 +241,8 @@ COMMENT ON COLUMN director_deployment_log.duration_connection IS 'The time it to
 COMMENT ON COLUMN director_deployment_log.duration_dump IS 'Time spent dumping the config (ms)';
 COMMENT ON COLUMN director_deployment_log.username IS 'The user that triggered this deployment';
 
+CREATE INDEX start_time_idx ON director_deployment_log (start_time);
+
 
 CREATE TABLE director_datalist (
   id serial,
@@ -2747,4 +2749,4 @@ CREATE INDEX branched_dependency_search_object_name ON branched_icinga_dependenc
 
 INSERT INTO director_schema_migration
   (schema_version, migration_time)
-  VALUES (178, NOW());
+  VALUES (179, NOW());