@Explain(displayName = "serde", explainLevels = { Level.USER, Level.DEFAULT, Level.EXTENDED })
  public String getSerdeName() {
    return serdeName;
  }
DDL task description for ALTER TABLE ... SET SERDE ... commands.
ql/src/java/org/apache/hadoop/hive/ql/ddl/table/storage/serde/AlterTableSetSerdeDesc.java