@Override
      protected List<SQLUniqueConstraint> getSqlResult(GetHelper<List<SQLUniqueConstraint>> ctx)
              throws MetaException {
        return directSql.getUniqueConstraints(catName, db_name, 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