Florian Wunderlich <fwunderlich(at)devbrain(dot)de> writes:
> So can I be sure that every non-aggregate SELECT on tables joined with
> unique indexes works, independent of the WHERE or ORDER BY?
I would think that backwards scan on a join mostly doesn't work, but
haven't tried it in any detail.
A plan with a SORT node at the top *will* work, no matter what's under
the SORT, so ORDER BY might mask problems in some cases.
> Is anybody working on implementing this functionality?
Not me... although I have thought about at least adding enough code to
report an error in the cases that will give wrong answers.
regards, tom lane
In response to
pgsql-docs by date
|Next:||From: Florian Wunderlich||Date: 2003-02-13 16:27:21|
|Subject: Re: Bug #866 related problem (ATTN Tom Lane)|
|Previous:||From: Wilson, Scott||Date: 2003-02-12 20:54:44|
|Subject: Row ordering difference in regression test output|
pgsql-bugs by date
|Next:||From: Tom Lane||Date: 2003-02-13 05:27:54|
|Subject: Re: Constraints not check indexes existence on creation. |
|Previous:||From: Bruno Wolff III||Date: 2003-02-12 20:45:48|
|Subject: Re: cvs (7/2/2003) broken?|