When some columns specified are not in the parquet or orc file in broker load, _batch->num_columns() will less than _num_of_columns_from_file. It will lead to be core dump. To prevent be core dump, just return an error in this case.
When some columns specified are not in the parquet or orc file in broker load, _batch->num_columns() will less than _num_of_columns_from_file. It will lead to be core dump. To prevent be core dump, just return an error in this case.