public void setFieldValue(_Fields field, @org.apache.thrift.annotation.Nullable java.lang.Object value) {
      switch (field) {
      case REQ:
        if (value == null) {
          unsetReq();
        } else {
          setReq((TOpenSessionReq)value);
        }
        break;

      }
    }
Returns true if field req is set (has been assigned a value) and false otherwise
service-rpc/src/gen/thrift/gen-javabean/org/apache/hive/service/rpc/thrift/TCLIService.java