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Link to MVCC docs in MERGE docs

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In addition, this moves the new paragraph in the MVCC page upwards, for
a more consistent flow; some minor markup mistakes, style issues and
typos are fixed too.

Per comments from Justin Pryzby.

Discussion: https://postgr.es/m/20220511163350.GL19626@telsasoft.com
This commit is contained in:
Alvaro Herrera
2022-06-15 16:54:38 +02:00
parent a059e15cde
commit ffffeebf24
2 changed files with 40 additions and 35 deletions
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doc/src/sgml/ref/merge.sgml
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@@ -539,6 +539,10 @@ MERGE <replaceable class="parameter">total_count</replaceable>
</para>
<para>
When <command>MERGE</command> is run concurrently with other commands
that modify the target table, the usual transaction isolation rules
apply; see <xref linkend="transaction-iso"/> for an explanation
on the behavior at each isolation level.
You may also wish to consider using <command>INSERT ... ON CONFLICT</command>
as an alternative statement which offers the ability to run an
<command>UPDATE</command> if a concurrent <command>INSERT</command>