Re: Combining scalar and row types in RETURNING

On 6/3/25 11:18, Ray O'Donnell wrote:
> On 03/06/2025 17:53, Tom Lane wrote:

> Thanks a million for the explanation, Tom - that makes sense. I tried
> what you suggested, with mixed results:
>
> (i) Running the MERGE as a stand-alone query, with just RETURNING... ,
> worked - I got a scalar and a row as expected.
>
> (ii) Running it in a function (actually a DO block), with m_new
> correctly declared as the table type, failed with the same error as before.
>
> (iii) Running (ii) but with the order of the items in RETURNING reversed -
>
>     ... returning t, merge_action() into m_new, m_action
>
> - gave me a different error:
>
> ERROR:  record variable cannot be part of multiple-item INTO list
> LINE 53:         m, merge_action() into m_new, m_action
>
> ...which seems to answer my question definitively.

This:

... returning t, merge_action() into m_new, m_action

does not match this:

LINE 53: m, merge_action() into m_new, m_action

Is this a copy and paste error or two different invocations of the function?

>
> Thanks once more,
>
> Ray.
>
>

--
Adrian Klaver
adrian(dot)klaver(at)aklaver(dot)com