bin/map, db_xml.put_table() (row-based and column-based import): Don't sort the input table by its pkey, in order to support input tables with no pkey. Note that reading the input table in table order and having this match the input flat file's order is only possible with sql_io.import_csv()'s truncation of the table on a failed import, which ensures that the rows will be stored in inserted order.