Re: UNION ALL has higher cost than inheritance

Greg Stark <gsstark@mit.edu>

From: Greg Stark <gsstark@mit.edu>

To: Tom Lane <tgl@sss.pgh.pa.us>

Cc: Itagaki Takahiro <itagaki.takahiro@gmail.com>, PostgreSQL Hackers <pgsql-hackers@postgresql.org>

Date: 2010-10-21T18:10:35Z

Lists: pgsql-hackers

On Thu, Oct 21, 2010 at 6:57 AM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
>> Thanks. It also explains my another question why Merge Append cannot
>> be used for UNION ALL plans.
>
> Hmm, seems like the example you show ought to work.  I wonder if there
> was an oversight in that patch...
>

Huh, that definitely worked in the earlier versions of the patch (as
much as it "worked" at all)

-- 
greg