code: private static List<RelationID> getTableList(String defaultTableSchema, Set<RelationID> realTables, QuotedIDFactory idfac) throws SQLException {
  
  		List<RelationID> fks = new LinkedList<>();
  		for (RelationID table : realTables) {
  			// defaultTableSchema is non-empty only for Oracle and DUAL is a special Oracle table
  			if (table.hasSchema() || (defaultTableSchema == null) || table.getTableName().equals("DUAL"))
  				fks.add(table);
  			else {
  				RelationID qualifiedTableId = idfac.createRelationID(defaultTableSchema, table.getTableNameSQLRendering());
  				fks.add(qualifiedTableId);
  			}
  		}
  		return fks;
  	}
docs: Retrieve the normalized list of tables from a given list of RelationIDs