Postgres Pro
Downloads
Home   >   mailing lists

Re: SELECT DISTINCT ON removes results - Mailing list pgsql-general

From David G. Johnston
Subject Re: SELECT DISTINCT ON removes results
Date
Msg-id CAKFQuwY8jkPy1EB97WqLFMu2ATLQ7_ueHAczt5s4UDdp8-iMog@mail.gmail.com
Whole thread Raw
In response to Re: SELECT DISTINCT ON removes results  (Guyren Howe <guyren@gmail.com>)
List pgsql-general
Tree view


On Fri, Oct 28, 2016 at 2:17 PM, Guyren Howe <guyren@gmail.com> wrote:
On Oct 28, 2016, at 14:15 , Guyren Howe <guyren@gmail.com> wrote:

On Oct 28, 2016, at 13:50 , David G. Johnston <david.g.johnston@gmail.com> wrote:

​On its face the statement "DISTINCT ON removes results" is not at all surprising given its definition.

What is surprising is that it removes *all* results…

The inner query on its own appears to produce the same results, but the left join with it in either case produces different results.

​Then maybe you can help us and create reproducible example that demonstrates the bug so that it can be fixed.

David J.
​
 

pgsql-general by date:

Previous
From: Adrian Klaver
Date:
Subject: Re: initdb createuser commands
Next
From: John R Pierce
Date:
Subject: Re: initdb createuser commands