refactor(core): Improve DB directory setup (#3502)

packages/cli/src/databases/migrations/postgresdb/1648740597343-LowerCaseUserEmail.ts

@@ -0,0 +1,23 @@
+import { MigrationInterface, QueryRunner } from 'typeorm';
+import config = require('../../../../config');
+
+export class LowerCaseUserEmail1648740597343 implements MigrationInterface {
+	name = 'LowerCaseUserEmail1648740597343';
+
+	public async up(queryRunner: QueryRunner): Promise<void> {
+		let tablePrefix = config.get('database.tablePrefix');
+		const schema = config.get('database.postgresdb.schema');
+		if (schema) {
+			tablePrefix = schema + '.' + tablePrefix;
+		}
+
+		await queryRunner.query(`SET search_path TO ${schema};`);
+
+		await queryRunner.query(`
+			UPDATE ${tablePrefix}user
+			SET email = LOWER(email);
+		`);
+	}
+
+	public async down(queryRunner: QueryRunner): Promise<void> {}
+}