Tom Lane wrote:
Seriously, I think what this shows is that piecemeal pullup is wrong in
principle, and that the right approach is always to concat the
subquery's rtable in toto to the upper level, and then go from there on
adjusting varnos.  Do you want to look into that approach?

You mean like pull_up_simple_subquery() does? Yeah, I can try that. This isn't really something I'm familiar with, but it's great exercise :-).

--
  Heikki Linnakangas
  EnterpriseDB   http://www.enterprisedb.com

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