Re: [PATCH] Add result_types column to pg_prepared_statements view

On 05.07.22 09:31, Dagfinn Ilmari Mannsåker wrote:
> On Tue, 5 Jul 2022, at 06:34, Peter Eisentraut wrote:
>> On 01.07.22 14:27, Dagfinn Ilmari Mannsåker wrote:
>>> Peter Eisentraut <peter.eisentraut@enterprisedb.com> writes:
>>>
>>>> On 19.05.22 17:34, Dagfinn Ilmari Mannsåker wrote:
>>>>> Prompted by a question on IRC, here's a patch to add a result_types
>>>>> column to the pg_prepared_statements view, so that one can see the types
>>>>> of the columns returned by a prepared statement, not just the parameter
>>>>> types.
>>>>> I'm not quite sure about the column name, suggestions welcome.
>>>>
>>>> I think this patch is sensible.
>>
>>> The arguments about client-side type-specific value handling for
>>> RowDescription don't apply here IMO, since this view is more
>>> user-facing.
>>
>> I agree.  It's also easy to change if needed.  Committed as is.
> 
> Thanks!

There was a problem that we didn't cover: Not all prepared statements 
have result descriptors (e.g., DML statements), so that would crash as 
written.  I have changed it to return null for result_types in that 
case, and added a test case.