@org.apache.thrift.annotation.Nullable
  public java.lang.String getSchemaName() {
    return this.schemaName;
  }
Returns true if field catalogName is set (has been assigned a value) and false otherwise
service-rpc/src/gen/thrift/gen-javabean/org/apache/hive/service/rpc/thrift/TGetColumnsReq.java