public SQLForeignKeyBuilder setPkName(String pkName) {
    this.pkName = pkName;
    return this;
  }
Builder for {@link SQLForeignKey}.  Requires what {@link ConstraintBuilder} requires, plus
primary key
database, table, column and name.
standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/client/builder/SQLForeignKeyBuilder.java