Re: MERGE ... RETURNING - Mailing list pgsql-hackers

From Jeff Davis
Subject Re: MERGE ... RETURNING
Date
Msg-id 425bd4540c7bf6f35bf3afbef012fbf360d13764.camel@j-davis.com
Whole thread Raw
In response to Re: MERGE ... RETURNING  (Vik Fearing <vik@postgresfriends.org>)
Responses Re: MERGE ... RETURNING
List pgsql-hackers
On Wed, 2023-07-12 at 03:47 +0200, Vik Fearing wrote:

> There is no RETURNING clause in Standard SQL, and the way they would
> do
> this is:
>
>      SELECT ...
>      FROM OLD TABLE (
>          MERGE ...
>      ) AS m
>
> The rules for that for MERGE are well defined.

I only see OLD TABLE referenced as part of a trigger definition. Where
is it defined for MERGE?

In any case, as long as the SQL standard doesn't conflict, then we're
fine. And it looks unlikely to cause a conflict right now that wouldn't
also be a conflict with our existing RETURNING clause elsewhere, so I'm
not seeing a problem here.

Regards,
    Jeff Davis




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