@Override
    public String toString() {
      return isPartition() ?
        StatsUtils.getFullyQualifiedTableName(part.getDbName(), part.getTableName()) + "@"
            + part.getValues()
        : Warehouse.getQualifiedName(tab);
    }
Returns true in case this data container is a partition.

@return boolean TRUE if the container is a table partition.
ql/src/java/org/apache/hadoop/hive/ql/hooks/LineageInfo.java