Re: Weird return-value from pg_get_function_identity_arguments() on certain aggregate functions?

On Mon, Mar 12, 2018 at 2:47 PM, David G. Johnston <
david(dot)g(dot)johnston(at)gmail(dot)com> wrote:

> On Mon, Mar 12, 2018 at 2:19 PM, P O'Toole <P(dot)OToole(at)uwyo(dot)edu> wrote:
>
>>
>> According to the System Information Functions docs,
>> pg_get_function_identity_arguments(OID) should simply "get argument list
>> to identify a function (without default values)", but one example of how it
>> behaves strangely is that:
>>
>>
>>
>> SELECT pg_get_function_identity_arguments('pg_catalog.percentile_disc(DOUBLE
>> PRECISION[], ANYELEMENT)'::REGPROCEDURE)
>>
>>
>>
> ​FWIW a simple \dfS percentile* will elicit the same description.
>
> I suppose it depends on what you are using the output for - the
> (percentile*) functions that are decorated with ORDER BY are exclusively
> aggregate, as opposed to standard, functions.
>
>
In this case I'd say the supposed bug is that GRANT ON FUNCTION doesn't
accept the signature of a valid CREATE AGGREGATE​ even though our existing
implementation uses it as an implementation mechanism for both (i.e., we
don't have a separate GRANT ON AGGREGATE).

David J.