On 5/4/23 07:03, Justin wrote:
On Thu, May 4, 2023 at 9:49 AM DAVID ROTH <adaptron@xxxxxxxxxxx
<mailto:adaptron@xxxxxxxxxxx>> wrote:
__
1) Can I create a trigger on a view?
2) Do triggers cascade?
Say I have an insert trigger on a table.
And, I have an insert trigger on a view that references this table
If I do an insert on the view, will both triggers fire?
Can not have triggers on Views, Views use RULES which are DO INSTEAD.
https://www.postgresql.org/docs/current/rules.html
<https://www.postgresql.org/docs/current/rules.html>
That is wrong.
See
https://www.postgresql.org/docs/current/sql-createtrigger.html
The following table summarizes which types of triggers may be used on
tables, views, and foreign tables:
Yes if you have an INSERT/UPDATE/DELETE rule on a view that inserts
into a table then that table's triggers will be executed.
Please note RULES should be avoided beyond the use case for VIEWS.
RULES are executed very early in the query tree; it is not
trivial to write rules on Tables.
Thanks
--
Adrian Klaver
adrian.klaver@xxxxxxxxxxx
