@Override
  public void setWriteId(long writeId) {
    this.writeId = writeId;
  }
@return what kind of replication scope this drop is running under.
This can result in a "CREATE/REPLACE IF NEWER THAN" kind of semantic
ql/src/java/org/apache/hadoop/hive/ql/ddl/table/partition/add/AlterTableAddPartitionDesc.java