Re: 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.

Thanks for the report. I will look into this.
--
Tatsuo Ishii
SRA OSS, Inc. Japan