public void setFk_name(@org.apache.thrift.annotation.Nullable java.lang.String fk_name) {
    this.fk_name = fk_name;
  }
Returns true if field delete_rule is set (has been assigned a value) and false otherwise
standalone-metastore/metastore-common/src/gen/thrift/gen-javabean/org/apache/hadoop/hive/metastore/api/SQLForeignKey.java