@Override
    public String quoteIdentifier(String identifier) {
        return "`" + identifier + "`";
    }
Date: 2019/12/20
Company: www.dtstack.com
@author yinxi
polardb/polardb-side/polardb-async-side/src/main/java/com/dtstack/flink/sql/side/polardb/PolardbAsyncSideInfo.java