I have a large database and I want to have several fields (among many) that are single character fields (in fact they are bitfields). 1) Is char(1) the most efficient way to store these fields? If not what is better? 2) I need to test the field against constants, e.g if the field is called source then I need tests like: IF source = 0x10 THEN ... This does not work in plpgsql functions (source is character(1)), so what is the solution? Thanks Andrew -- ___________________________________________ Andrew J. P. Maclean Centre for Autonomous Systems The Rose Street Building J04 The University of Sydney 2006 NSW AUSTRALIA Ph: +61 2 9351 3283 Fax: +61 2 9351 7474 URL: http://www.acfr.usyd.edu.au/ ___________________________________________