private String getKey(String dbName, String tableName) {
    if (tableName == null) {
      return dbName + ".*";
    }
    return dbName + "." + tableName;
  }
Utility class to store replication state of a table.
ql/src/java/org/apache/hadoop/hive/ql/parse/repl/load/UpdatedMetaDataTracker.java