Re: support for MERGE

On 2022-May-11, Justin Pryzby wrote:

> I suggest to reference the mvcc docs from the merge docs, or to make the merge
> docs themselves include the referenced information.
> 
> diff --git a/doc/src/sgml/ref/merge.sgml b/doc/src/sgml/ref/merge.sgml
> index f68aa09736c..99dd5814f36 100644
> --- a/doc/src/sgml/ref/merge.sgml
> +++ b/doc/src/sgml/ref/merge.sgml
> @@ -544,6 +544,7 @@ MERGE <replaceable class="parameter">total_count</replaceable>
>     <command>UPDATE</command> if a concurrent <command>INSERT</command>
>     occurs.  There are a variety of differences and restrictions between
>     the two statement types and they are not interchangeable.
> +   See <xref linkend="mvcc"/> for more information.

Reading the paragraph, I think it may be better to do it the other way
around: first mention that concurrency is described in the MVCC page,
then explain that INSERT ON CONFLICT also exists.  What do you think of
the attached?

-- 
Álvaro Herrera        Breisgau, Deutschland  —  https://www.EnterpriseDB.com/