presto-tpch/src/main/java/io/prestosql/plugin/tpch/TpchMetadata.java/TpchMetadata/getColumnHandle
class TpchMetadata:    private ColumnHandle getColumnHandle(TpchTableHandle tpchTableHandle, Map<String, ColumnHandle> columnHandles, String columnName)
    {
        TpchTable<?> table = TpchTable.getTable(tpchTableHandle.getTableName());
        return columnHandles.get(columnNaming.getName(table.getColumn(columnName)));
    }