```

CREATE TABLE `test_lot` (
  `lot_id` bigint unsigned NOT NULL,
  `trade_date` date NOT NULL,
  PRIMARY KEY (`lot_id`,`trade_date`)
) ENGINE=InnoDB 
  
 ALTER TABLE test_lot ADD COLUMN event_ref_type_id INTEGER, algorithm=instant, ADD COLUMN event_ref_id BIGINT, algorithm=instant;

```

The ANTLR parser only parses the first column event_ref_type_id and stops after that and does not parse the second column event_ref_id