Обсуждение: BUG #17614: "variable not found in subplan target lists" on grouping query

The following bug has been logged on the website:

Bug reference:      17614
Logged by:          Wei Wei
Email address:      androiddown_weiwei@hotmail.com
PostgreSQL version: 11.17
Operating system:   Linux ubuntu 5.4.0-125-generic
Description:

The problem is reproducible with following sql:
```
    SELECT
        sp2.spf_id 
    FROM
        information_schema.sql_parts AS sp
        CROSS JOIN LATERAL ( SELECT sizing_id FROM information_schema.sql_sizing )
AS ss
        CROSS JOIN LATERAL ( SELECT sp.feature_id AS spf_id ) AS sp2
    GROUP BY
        CUBE ( sp2.spf_id )
```
but seems having been fixed since 12.0

PG Bug reporting form <noreply@postgresql.org> writes:
> The problem is reproducible with following sql:
> ```
>     SELECT
>         sp2.spf_id 
>     FROM
>         information_schema.sql_parts AS sp
>         CROSS JOIN LATERAL ( SELECT sizing_id FROM information_schema.sql_sizing )
> AS ss
>         CROSS JOIN LATERAL ( SELECT sp.feature_id AS spf_id ) AS sp2
>     GROUP BY
>         CUBE ( sp2.spf_id )
> ```
> but seems having been fixed since 12.0

Yeah, it's a bug in code that we actually removed in v12
(so the fix was kind of accidental).  Repaired, thanks
for the report!

            regards, tom lane