@Override
        protected List<Partition> getSqlResult(GetHelper<List<Partition>> ctx)
            throws MetaException {
          return directSql.alterPartitions(table, partNames, newParts, queryWriteIdList);
        }
Alters an existing partition. Initiates copy of SD. Returns the old CD.
@param part_vals Partition values (of the original partition instance)
@param newPart Partition object containing new information
standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/ObjectStore.java