Re: [HACKERS] Bug

> Oleg Broytmann <phd@sun.med.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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