@Override
    public void open(Configuration parameters) throws Exception {
        super.open(parameters);
        initCache();
        initMetric();
        LOG.info("async dim table config info: {} ", sideInfo.getSideTableInfo().toString());
    }
All interfaces inherit naming rules: type + "AsyncReqRow" such as == "MysqlAsyncReqRow
only support Left join / inner join(join),not support right join
Date: 2018/7/9
Company: www.dtstack.com

@author xuchao
core/src/main/java/com/dtstack/flink/sql/side/BaseAsyncReqRow.java