Create an index for contextURL column

Author: Laurie T. Malau

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

@@ -27,6 +27,7 @@ export class DBWorkspace implements Workspace {
     ownerId: string;
 
     @Column("text")
+    @Index('ind_contextURL')
     contextURL: string;
 
     @Column({

components/gitpod-db/src/typeorm/migration/1644327547997-IndexWorkspaceContextUrl.ts

@@ -0,0 +1,25 @@
+/**
+ * Copyright (c) 2022 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";
+
+export class IndexWorkspaceContextUrl1644327547997 implements MigrationInterface {
+
+    public async up(queryRunner: QueryRunner): Promise<void> {
+        const TABLE_NAME = "d_b_workspace";
+        const INDEX_NAME = "ind_contextURL";
+
+        if(!(await indexExists(queryRunner, TABLE_NAME, INDEX_NAME))) {
+            await queryRunner.query("ALTER TABLE d_b_workspace MODIFY COLUMN `contextURL` varchar(255) NOT NULL");
+            await queryRunner.query(`CREATE INDEX ${INDEX_NAME} ON ${TABLE_NAME} (contextURL)`);
+        }
+    }
+
+    public async down(queryRunner: QueryRunner): Promise<void> {
+    }
+
+}