code: public boolean isAllInDefaultDataSource(final Collection<String> logicTableNames) {
          for (String each : logicTableNames) {
              if (findTableRule(each).isPresent() || isBroadcastTable(each)) {
                  return false;
              }
          }
          return !logicTableNames.isEmpty();
      }
docs: Judge logic tables is all belong to default data source.
  
  @param logicTableNames logic table names
  @return logic tables is all belong to default data source