@Override
      protected List<SQLForeignKey> getSqlResult(GetHelper<List<SQLForeignKey>> ctx) throws MetaException {
        return directSql.getForeignKeys(catName, parent_db_name,
          parent_tbl_name, foreign_db_name, foreign_tbl_name);
      }
Get partition's column stats

@return Map of column name and its stats
standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/ObjectStore.java