public String getMillisAfterEpochFn() throws MetaException {
    String epochFn = DB_EPOCH_FN.get(dbType);
    if (epochFn != null) {
      return epochFn;
    } else {
      String msg = "Unknown database product: " + dbType.toString();
      LOG.error(msg);
      throw new MetaException(msg);
    }
  }
Get database specific function which returns the milliseconds value after the epoch.
@throws MetaException For unknown database type.
standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/DatabaseProduct.java