Add migration to change credit column type

No data to preserve so drop and recreate the table.

Author: Andrew Farries

components/gitpod-db/src/typeorm/migration/1658123555591-ChangeUsageCreditsColumnType.ts

@@ -0,0 +1,27 @@
+/**
+ * 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";
+
+export class New1658123371893 implements MigrationInterface {
+    public async up(queryRunner: QueryRunner): Promise<void> {
+        await queryRunner.query(`DROP INDEX \`ind_stoppedAt\` ON \`d_b_workspace_instance_usage\``);
+        await queryRunner.query(`DROP INDEX \`ind_startedAt\` ON \`d_b_workspace_instance_usage\``);
+        await queryRunner.query(`DROP INDEX \`ind_attributionId\` ON \`d_b_workspace_instance_usage\``);
+        await queryRunner.query(`DROP TABLE \`d_b_workspace_instance_usage\``);
+
+        await queryRunner.query(
+            `CREATE TABLE \`d_b_workspace_instance_usage\` (\`instanceId\` char(36) NOT NULL, \`attributionId\` varchar(255) NOT NULL, \`startedAt\` timestamp(6) NOT NULL, \`stoppedAt\` timestamp(6) NULL, \`creditsUsed\` int NOT NULL, \`generationId\` int NOT NULL, \`deleted\` tinyint NOT NULL, INDEX \`ind_attributionId\` (\`attributionId\`), INDEX \`ind_startedAt\` (\`startedAt\`), INDEX \`ind_stoppedAt\` (\`stoppedAt\`), PRIMARY KEY (\`instanceId\`)) ENGINE=InnoDB`,
+        );
+    }
+
+    public async down(queryRunner: QueryRunner): Promise<void> {
+        await queryRunner.query(`DROP INDEX \`ind_stoppedAt\` ON \`d_b_workspace_instance_usage\``);
+        await queryRunner.query(`DROP INDEX \`ind_startedAt\` ON \`d_b_workspace_instance_usage\``);
+        await queryRunner.query(`DROP INDEX \`ind_attributionId\` ON \`d_b_workspace_instance_usage\``);
+        await queryRunner.query(`DROP TABLE \`d_b_workspace_instance_usage\``);
+    }
+}