code: public void addDatabaseShardingValue(final String logicTable, final Comparable<?> value) {
          databaseShardingValues.put(logicTable, value);
          databaseShardingOnly = false;
      }
docs: Add sharding value for database.
  
  <p>The sharding operator is {@code =}</p>
  
  @param logicTable logic table name
  @param value sharding value