=?UTF-8?Q?Grzegorz_Ja=C5=9Bkiewicz?= <gryzman@xxxxxxxxx> writes: > On Thu, Jul 9, 2009 at 5:26 PM, Craig James<craig_james@xxxxxxxxxxxxxx> wrote: >> Suppose I have a large table with a small-cardinality CATEGORY column (say, >> categories 1..5). Â I need to sort by an arbitrary (i.e. user-specified) >> mapping of CATEGORY, something like this: > you can create translation table, join it, and sort by its key. Much easier to ORDER BY CASE category WHEN 'z' THEN 1 WHEN 'a' THEN 2 ... END Actually, consider putting the CASE into a function and doing ORDER BY sort_order(category) regards, tom lane -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
