Hi, On Sun, Feb 03, 2008 at 07:07:34PM -0500, John Siracusa wrote: > Sorry, actually I should have suggested on_load, but no matter because > something else is obviously wrong. Can you post a small > self-contained example including the table definitions and class > definitions? That's usually the fastest way to get to the bottom of > these things.
Test case attached. It's weird. Help! ;) Note that it'll probably fail on vanilla RDBO due to lack of column qualifiers. > > > BTW, below is the patch I'm using. If you could have a look at it and > > check for obvious blunders, I'd be very grateful. I'm including it for > > the off chance that I broke something by using it. > > That's another thing: why is the table prefix necessary even on > single-table queries? I suspect the aforementioned self-contained > example will illuminate this as well, once I try to run it. > > As for the patch, it looks reasonable but I'd rather understand why > it's necessary and provide official support for it than encourage you > to continue using your patch :) Functions taking rows as arguments may be used like extra table columns only when qualified with a table alias. Try this code in PostgreSQL (8.2 is neccessary for multi row inserts but otherwise it should run on any version): create table test(id serial primary key, val1 int not null, val2 int not null); insert into test(val1, val2) values(1,1),(2,2),(3,3),(4,4); create function is_even(test) returns boolean stable strict as $$ select $1.val1 % 2 = 0 $$ language sql; Now, the unprefixed version: select id, val1, val2, is_even from test; ERROR: column "is_even" does not exist LINE 1: select id, val1, val2, is_even from test; And the version with table prefixes: select t.id, t.val1, t.val2, t.is_even from test t; id | val1 | val2 | is_even ----+------+------+--------- 1 | 1 | 1 | f 2 | 2 | 2 | t 3 | 3 | 3 | f 4 | 4 | 4 | t BTW, I noticed that 0.7662 qualifies column names in ORDER BY clauses. Nice :) That fixed another problem of mine, too (allows sorting on function columns). Best regards, Grzegorz Nosek
rdbo_computed_functions.tar.gz
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