On Fri, Oct 29, 2004 at 05:13:02PM -0500, Jim C. Nasby wrote: > Ok, next stupid question that I can't find in the docs... How would I > join a table to an array? IE: if I have an array of primary keys for > some table and I want to get the name field from that table and turn it > back into an array, how would I do that?
See the "Subquery Expressions" and "Row and Array Comparisons" sections in the PostgreSQL documentation: http://www.postgresql.org/docs/7.4/static/functions-subquery.html http://www.postgresql.org/docs/7.4/static/functions-comparisons.html If I understand you correctly, this should work: SELECT ARRAY(SELECT name FROM foo WHERE id = ANY(ARRAY[1,2,3])); A test I just ran showed "id = ANY(ARRAY[1,2,3])" doing a sequential scan whereas "id IN (1,2,3)" did an index scan, so you might want to use the latter if possible. -- Michael Fuhr http://www.fuhr.org/~mfuhr/ ---------------------------(end of broadcast)--------------------------- TIP 2: you can get off all lists at once with the unregister command (send "unregister YourEmailAddressHere" to [EMAIL PROTECTED])
