> > > Any ideas?
> > I knew there was a reason I did not support NULL in union. :-)
>
> Yeah, it's sticky. Where in the code does the sorting get set up?
>
> - Tom
>
See optimizer/prep/prepunion.c::plan_union_queries(). You will see me
calling transformSortClause() from there to set up a query using
UNION/UNION ALL. I think that is where the problem is happening.
Whatever you did in the parser to get these types converted is not in
that function. Can you check into it? Should I be doing that in
another place. I am unsure, but it looks like the best place for it.
I think the major problem is the way I am re-ordering the UNION sort to
handle the placement of UNION and UNION ALL. I think I need some more
code, or perhaps grab some structure you are already populating in the
parser in this place.
When I required all the types to be the same, it didn't matter how I
re-ordered things.
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