refactor(core): Add support for implicit schema in postgres migrations (#5233)

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

@@ -1,20 +1,13 @@
 import { MigrationInterface, QueryRunner } from 'typeorm';
-import config from '@/config';
+import { getTablePrefix } from '@db/utils/migrationHelpers';
 
 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};`);
-
+		const tablePrefix = getTablePrefix();
 		await queryRunner.query(`
-			UPDATE ${tablePrefix}user
+			UPDATE "${tablePrefix}user"
 			SET email = LOWER(email);
 		`);
 	}