private boolean isValidRowKind(In record) {
        RowData rowData = (RowData) record;
        return RowKind.UPDATE_BEFORE != rowData.getRowKind();
    }
update before is used for metric computing only
@param record
@return
inlong-sort/sort-flink/sort-flink-v1.13/sort-connectors/jdbc/src/main/java/org/apache/inlong/sort/jdbc/internal/JdbcBatchingOutputFormat.java