Parsing errors from mysql dump

[shreyakhajanchi]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. What did you do? Ran parser for dump file with following system generated code at the beginning :

-- MySQL dump 10.13  Distrib 5.7.35-38, for Linux (x86_64)
--
-- Host: localhost    Database: xxx
-- ------------------------------------------------------
-- Server version	5.7.35-38-log

/*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT */;
/*!40101 SET @OLD_CHARACTER_SET_RESULTS=@@CHARACTER_SET_RESULTS */;
/*!40101 SET @OLD_COLLATION_CONNECTION=@@COLLATION_CONNECTION */;
/*!40101 SET NAMES utf8 */;
/*!40103 SET @OLD_TIME_ZONE=@@TIME_ZONE */;
/*!40103 SET TIME_ZONE='+00:00' */;
/*!40014 SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0 */;
/*!40014 SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0 */;
/*!40101 SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE='NO_AUTO_VALUE_ON_ZERO' */;
/*!40111 SET @OLD_SQL_NOTES=@@SQL_NOTES, SQL_NOTES=0 */;
/*!50717 SELECT COUNT(*) INTO @rocksdb_has_p_s_session_variables FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA = 'performance_schema' AND TABLE_NAME = 'session_variables' */;
/*!50717 SET @rocksdb_get_is_supported = IF (@rocksdb_has_p_s_session_variables, 'SELECT COUNT(*) INTO @rocksdb_is_supported FROM performance_schema.session_variables WHERE VARIABLE_NAME=\'rocksdb_bulk_load\'', 'SELECT 0') */;
/*!50717 PREPARE s FROM @rocksdb_get_is_supported */;
/*!50717 EXECUTE s */;
/*!50717 DEALLOCATE PREPARE s */;
/*!50717 SET @rocksdb_enable_bulk_load = IF (@rocksdb_is_supported, 'SET SESSION rocksdb_bulk_load = 1', 'SET @rocksdb_dummy_bulk_load = 0') */;
/*!50717 PREPARE s FROM @rocksdb_enable_bulk_load */;
/*!50717 EXECUTE s */;
/*!50717 DEALLOCATE PREPARE s */;

2. What did you expect to see? dump as is

3. What did you see instead? parse error: line 1 column 64 near "@rocksdb_has_p_s_session_variables FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA = 'performance_schema' AND TABLE_NAME = 'session_variables' */;

4. What version of TiDB SQL Parser are you using? http://github.com/pingcap/tidb/types/parser_driver@328b6d0 http://github.com/pingcap/parser@3a18f1e

[morgo]

This is the query which fails:

SELECT COUNT(*) INTO @rocksdb_has_p_s_session_variables FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA = 'performance_schema' AND TABLE_NAME = 'session_variables' 

This is due to this feature missing: https://github.com/pingcap/tidb/issues/23924

[shreyakhajanchi]

Any estimate on when the feature would be added?

[morgo]

It is not currently planned, but a feature that is open for contributors.

[shreyakhajanchi]

Is there any flag we can pass or anything like that to avoid parsing of such system generated code in dump file ?