[db] DBPrebuiltWorkspace: Add index ind_creationTime

Author: geropl

components/gitpod-db/src/typeorm/entity/db-prebuilt-workspace.ts

@@ -53,6 +53,7 @@ export class DBPrebuiltWorkspace implements PrebuiltWorkspace {
         default: () => "CURRENT_TIMESTAMP(6)",
         transformer: Transformer.MAP_ISO_STRING_TO_TIMESTAMP_DROP,
     })
+    @Index("ind_creationTime")
     creationTime: string;
 
     @Column(TypeORM.WORKSPACE_ID_COLUMN_TYPE)

components/gitpod-db/src/typeorm/migration/1695797972732-PrebuildAddIndexCreationTime.ts

@@ -0,0 +1,27 @@
+/**
+ * Copyright (c) 2023 Gitpod GmbH. All rights reserved.
+ * Licensed under the GNU Affero General Public License (AGPL).
+ * See License.AGPL.txt in the project root for license information.
+ */
+
+import { MigrationInterface, QueryRunner } from "typeorm";
+import { indexExists } from "./helper/helper";
+
+const TABLE_NAME = "d_b_prebuilt_workspace";
+const INDEX_NAME = "ind_creationTime";
+
+export class PrebuildAddIndexCreationTime1695797972732 implements MigrationInterface {
+    public async up(queryRunner: QueryRunner): Promise<void> {
+        if (!(await indexExists(queryRunner, TABLE_NAME, INDEX_NAME))) {
+            await queryRunner.query(
+                `ALTER TABLE ${TABLE_NAME} ADD INDEX(${INDEX_NAME}), ALGORITHM=INPLACE, LOCK=NONE `,
+            );
+        }
+    }
+
+    public async down(queryRunner: QueryRunner): Promise<void> {
+        if (await indexExists(queryRunner, TABLE_NAME, INDEX_NAME)) {
+            await queryRunner.query(`DROP INDEX ${INDEX_NAME} ON ${TABLE_NAME}`);
+        }
+    }
+}