@Override
                           public Iterator<org.apache.hadoop.hive.ql.metadata.Partition> iterator() {
                             return qlPartitionIterator;
                           }
AuthorizationPreEventListener : A MetaStorePreEventListener that
performs authorization/authentication checks on the metastore-side.

Note that this can only perform authorization checks on defined
metastore PreEventContexts, such as the adding/dropping and altering
of databases, tables and partitions.
ql/src/java/org/apache/hadoop/hive/ql/security/authorization/AuthorizationPreEventListener.java