public Builder clearSql() {
        bitField0_ = (bitField0_ & ~0x00002000);
        sql_ = getDefaultInstance().getSql();
        onChanged();
        return this;
      }
<code>optional string hint = 16;</code>

<pre>
* dml/ddl sql *
</pre>
node/etl/src/main/java/com/alibaba/otter/node/etl/model/protobuf/BatchProto.java