Обсуждение: query dumping core

Here it is.  I think Tom mentioned this problem.

---------------------------------------------------------------------------


select date_trunc('month',transdate), sum(quantity) from wolf group by
1 order by 1\g
pqReadData() -- backend closed the channel unexpectedly.       This probably means the backend terminated abnormally
  before or while processing the request.
 
We have lost the connection to the backend, so further processing is
impossible.  Terminating.

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Bruce Momjian <maillist@candle.pha.pa.us> writes:
> Here it is.  I think Tom mentioned this problem.

> select date_trunc('month',transdate), sum(quantity) from wolf group by
> 1 order by 1
> pqReadData() -- backend closed the channel unexpectedly.

Yeah, this is another one of the GROUP-BY-nontrivial-expression
problems.  I'm on it.  It looks like the HAVING patch broke the
interaction between union_planner() and make_groupPlan().
I'm trying to restructure that code in a way that's more
intelligible, as well as correct...
        regards, tom lane