@Explain(displayName = "replication", explainLevels = { Level.USER, Level.DEFAULT, Level.EXTENDED })
  public ReplicationSpec getReplicationSpec() {
    return this.replicationSpec;
  }
@return what kind of replication scope this rename is running under.
This can result in a "RENAME IF NEWER THAN" kind of semantic
ql/src/java/org/apache/hadoop/hive/ql/ddl/table/partition/rename/AlterTableRenamePartitionDesc.java