added primary key to option_collection

treeherder/model/sql/template_schema/project_jobs_1.sql.tmpl

@@ -80,7 +80,7 @@ DROP TABLE IF EXISTS `job`;
  *  build_platform_id - References treeherder_reference_1.build_platform.id
  *  machine_platform_id - References treeherder_reference_1.machine_platform.id
  *  machine_id - References treeherder_reference_1.machine.id
- *  option_collection_id - References treeherder_reference_1.option_collection.id
+ *  option_collection_id - References treeherder_reference_1.option_collection.option_collection_id
  *  job_type_id - References treeherder_reference_1.job_type.id 
  *  product_id - References treeherder_reference_1.product.id 
  *  who - Description of who submitted the job: gaia | scheduler name | username

treeherder/model/sql/template_schema/treeherder_reference_1.sql.tmpl

@@ -358,13 +358,17 @@ DROP TABLE IF EXISTS `option_collection`;
  *
  * Example Data:
  *
+ *  option_collection_id - Used to group collections of objects
  *  option_id - References option.id
  **************************/
 CREATE TABLE `option_collection` (
-  `id` int(10) unsigned NOT NULL,
+  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
+  `option_collection_id` int(10) unsigned NOT NULL,
   `option_id` int(10) unsigned NOT NULL,
-  UNIQUE KEY `uni_option_collection` (`id`,`option_id`),
-  KEY `fk_option` (`option_id`),
+  PRIMARY KEY (`id`),
+  UNIQUE KEY `uni_option_collection` (`option_collection_id`,`option_id`),
+  KEY `idx_option` (`option_id`),
+  KEY `idx_option_collection_id` (`option_collection_id`),
   CONSTRAINT `fk_option` FOREIGN KEY (`option_id`) REFERENCES `option` (`id`)
 ) ENGINE={engine} DEFAULT CHARSET=utf8 COLLATE=utf8_bin;
 /*!40101 SET character_set_client = @saved_cs_client */;