Re: [HACKERS] Bug

> Oleg Broytmann <phd(at)sun(dot)med(dot)ru> writes:
> > ran=> create table test1 (n int default nextval('seq_test'), t text);
> > ran=> insert into test1 ("t") select distinct src from test_source;
> > [ doesn't work right ]
>
> My, that's an interesting case. I think that fits right in with my
> remark yesterday that the SELECT inside an INSERT ... SELECT needs
> to have a targetlist that's separate from the INSERT's list. As it
> stands, we form a targetlist representing the set of values that need
> to be inserted into the target table --- and then the DISTINCT pass
> runs on those tuples :-(, because there is nothing else for it to
> run on.
>
> In short, this is not a trivial thing to fix. We need multilevel
> query trees...

Added to TODO:

* Allow multi-level query trees for INSERT INTO ... SELECT

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