@Explain(displayName = "database name", explainLevels = { Level.USER, Level.DEFAULT, Level.EXTENDED })
  public String getDbName() {
    return dbName;
  }
DDL task description for SHOW MATERIALIZED VIEWS commands.
ql/src/java/org/apache/hadoop/hive/ql/ddl/view/materialized/show/ShowMaterializedViewsDesc.java