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Diffstat (limited to 'doc/src/sgml/ref/merge.sgml')
| -rw-r--r-- | doc/src/sgml/ref/merge.sgml | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/doc/src/sgml/ref/merge.sgml b/doc/src/sgml/ref/merge.sgml index f68aa09736c..f0745d01c7d 100644 --- a/doc/src/sgml/ref/merge.sgml +++ b/doc/src/sgml/ref/merge.sgml @@ -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> |