> Given
> create table t1 (name text, value float8);
>
> this fails:
> SELECT name, value FROM t1 as touter WHERE
> (value/(SELECT AVG(value) FROM t1 WHERE name = touter.name)) > 0.75;
> ERROR: parser: '/' must return 'bool' to be used with subquery
Aren't you really saying WHERE col / (subselect). That doesn't return
bool, so the message seems correct.
We don't allow subselects in target lists, or inside expressions.
>
> The code in parse_expr.c that produces this message claims to be
> enforcing that "sub-selects can only be used in WHERE clauses".
> Either the comment is inaccurate or the test is too restrictive.
> If the test is correct then I think the error message is unhelpful.
> Anybody understand this code well enough to know what's really going on?
>
> regards, tom lane
>
>
-- Bruce Momjian | http://www.op.net/~candle maillist@candle.pha.pa.us | (610)
853-3000+ If your life is a hard drive, | 830 Blythe Avenue + Christ can be your backup. | Drexel Hill,
Pennsylvania19026
