Re: [HACKERS] Parser bug: alias is a "non-group column"?

Bruce Momjian <maillist(at)candle(dot)pha(dot)pa(dot)us> writes:
> Where did we leave this?

It's still broken. I have the following notes in my todo list:

Inconsistent handling of attribute renaming:
create table t1 (name text, value float8);
select name as n1 from t1 where n1 = 'one' ;
ERROR: attribute 'n1' not found
but
SELECT name AS tempname, value FROM t1 GROUP BY name, value ;
SELECT name AS tempname, value FROM t1 GROUP BY tempname, value ;
both work. Even stranger,
SELECT name AS tempname, value FROM t1 GROUP BY name, value
HAVING value/AVG(value) > 0.75;
ERROR: Illegal use of aggregates or non-group column in target list
(it thinks tempname is not in the GROUP BY list) but
SELECT name AS tempname, value FROM t1 GROUP BY tempname, value
HAVING value/AVG(value) > 0.75;
works! (6.4.2 has same behavior for all cases...)

Looks like the parser has some problems in the presence of column
renaming. Since 6.4.2 has the same bug I doubt this qualifies as a
showstopper for 6.5; I have other todo items that I consider higher
priority. If someone else wants to dig into this, be my guest...

regards, tom lane