Re: [HACKERS] WITH RECURSIVE patches 0818

> I think I may have found another bug:
>
> WITH RECURSIVE t(i,j) AS (
> VALUES (1,2)
> UNION ALL
> SELECT t2.i, t.j
> FROM (
> SELECT 2 AS i
> UNION ALL /* Wrongly getting detected, I think */
> SELECT 3 AS i
> ) AS t2
> JOIN
> t
> ON (t2.i = t.i)
> )
> SELECT * FROM t;
> ERROR: attribute number 2 exceeds number of columns 1
>
> Is there some way to ensure that in the case of WITH RECURSIVE, the
> query to the right of UNION ALL follows only the SQL:2008 rules about
> not having outer JOINs, etc. in it, but otherwise make it opaque to
> the error-checking code?
>
> I know I didn't explain that well, but the above SQL should work and
> the error appears to stem from the parser's looking at the innermost
> UNION ALL instead of the outermost.

Here is new patches fixing the bug you pointed out (patches was
created by Yoshiyuki). Also I added your SQL to the regression test,
and now the patches is against CVS HEAD. For your convenience I also
include patches against the previous version.
--
Tatsuo Ishii
SRA OSS, Inc. Japan