Re: top-level DML under CTEs

On 2010-09-17 4:48 AM, Hitoshi Harada wrote:
> 2010/9/15 Hitoshi Harada<umi.tanuki@gmail.com>:
>> Well, I didn't know it is allowed. That would look like the way to go.
>
> I made changes to the previous version, so that it avoids to resolve
> CTE name duplication.

This patch still doesn't address the issue Tom raised here:
http://archives.postgresql.org/pgsql-hackers/2010-09/msg00753.php

For WITH .. INSERT .. WITH .. SELECT ..; this patch works OK, but not so 
much for VALUES:

=# CREATE RULE barrule AS ON UPDATE TO bar DO INSTEAD
-# WITH RECURSIVE t AS (SELECT -1)
-# INSERT INTO bar
-# WITH t AS (SELECT 1)
-# VALUES((SELECT * FROM t));
CREATE RULE

=# \d bar
       Table "public.bar"
  Column |  Type   | Modifiers
--------+---------+-----------
  a      | integer |
Rules:
     barrule AS
     ON UPDATE TO bar DO INSTEAD  WITH RECURSIVE t AS (
          SELECT 1
         ), t AS (
          SELECT (-1)
         )
  INSERT INTO bar (a)  WITH RECURSIVE t AS (
                  SELECT 1
                 ), t AS (
                  SELECT (-1)
                 )

   VALUES (( SELECT t."?column?"
            FROM t))


Regards,
Marko Tiikkaja