n8n/packages/cli/src/databases/migrations/mysqldb/1659895550980-AddJsonKeyPinData.ts

import {
	logMigrationStart,
	logMigrationEnd,
	runInBatches,
	getTablePrefix,
} from '../../utils/migrationHelpers';
import { addJsonKeyToPinDataColumn } from '../sqlite/1659888469333-AddJsonKeyPinData';
import type { MigrationInterface, QueryRunner } from 'typeorm';

/**
 * Convert JSON-type `pinData` column in `workflow_entity` table from
 * `{ [nodeName: string]: IDataObject[] }` to `{ [nodeName: string]: INodeExecutionData[] }`
 */
export class AddJsonKeyPinData1659895550980 implements MigrationInterface {
	name = 'AddJsonKeyPinData1659895550980';

	async up(queryRunner: QueryRunner) {
		logMigrationStart(this.name);

		const workflowTable = `${getTablePrefix()}workflow_entity`;

		const PINDATA_SELECT_QUERY = `
			SELECT id, pinData
			FROM \`${workflowTable}\`
			WHERE pinData IS NOT NULL;
		`;

		const PINDATA_UPDATE_STATEMENT = `
			UPDATE \`${workflowTable}\`
			SET \`pinData\` = :pinData
			WHERE id = :id;
		`;

		await runInBatches(
			queryRunner,
			PINDATA_SELECT_QUERY,
			addJsonKeyToPinDataColumn(queryRunner, PINDATA_UPDATE_STATEMENT),
		);

		logMigrationEnd(this.name);
	}

	async down() {
		// irreversible migration
	}
}