Peter Eisentraut <> writes:
> On 10/31/17 14:23, Tom Lane wrote:
>> Why not use VOIDOID for the prorettype value?

> We need a way to distinguish functions that are callable by SELECT and
> procedures that are callable by CALL.

Do procedures of this ilk belong in pg_proc at all?  It seems like a large
fraction of the attributes tracked in pg_proc are senseless for this
purpose.  A new catalog might be a better approach.

In any case, I buy none of your arguments that 0 is a better choice than a
new pseudotype.

                        regards, tom lane

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