Gregory Stark <stark@enterprisedb.com> writes:
> I could imagine problems the planner would have to deal with though, such as
> what type is "bogon" in this query?

> WITH RECURSIVE x(bogon) AS (select bogon from x) select * from x;

Just a note --- that's not the planner's problem, either. Semantic
interpretation of the meaning of a query is supposed to be completed
during parse analysis.

regards, tom lane

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