Robert Haas <> writes:
> On Fri, Nov 10, 2017 at 2:24 PM, Tom Lane <> wrote:
>> Also, I wonder whether the InvalidOid hack in SS_assign_special_param
>> requires commentary.  It might be safer to use a valid type OID there,

> There is existing precedent for using InvalidOid to denote the absence
> of a parameter -- cf. copyParamList, SerializeParamList.

OK, fair enough.  I was concerned that this was adding a corner case
not otherwise seen with Params, but evidently not.

                        regards, tom lane

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