doc: Update partitioning limitation on BEFORE triggers
Reported-by: Erwin Brandstetter
Discussion:
@@ -4065,8 +4065,8 @@ ALTER INDEX measurement_city_id_logdate_key
<listitem>
<para>
- <literal>BEFORE ROW</literal> triggers, if necessary, must be defined
- on individual partitions, not the partitioned table.
+ <literal>BEFORE ROW</literal> triggers cannot change which partition
+ is the final destination for a new row.
</para>
</listitem>
