Re: create a procedure based on column data change in postgrersql
| От | David G. Johnston |
|---|---|
| Тема | Re: create a procedure based on column data change in postgrersql |
| Дата | |
| Msg-id | CAKFQuwbYdEkhW3KT19-WC6D1=QY-6=UEZU0MgMT8TV7RyVRLSg@mail.gmail.com обсуждение исходный текст |
| Ответ на | create a procedure based on column data change in postgrersql (Jian He <hejian.mark@gmail.com>) |
| Список | pgsql-sql |
On Tue, Oct 19, 2021 at 6:46 AM Jian He <hejian.mark@gmail.com> wrote:
This is very useful and interesting. I can see it's very useful. I am not sure if it's costly or not?when I update then error occurs. the update clause didn't execute. the function did fired.NOTICE: hello world
ERROR: control reached end of trigger procedure without RETURN
CONTEXT: PL/pgSQL function notify_insert_account_details()______________________________________________I am wondering how sophisticated this procedure/function notify_insert_account_details() can become, let's say linked within 3 table.Can anyone showcase an example/demo?I also asked same question on stackoverflow. Since it's more easy to search. (https://stackoverflow.com/questions/69631945/create-a-procedure-based-on-column-data-change-in-postgrersql),
When you discover some new feature that you've never seen before on StackOverflow (or elsewhere) I suggest you take some time to read the documentation, which often contains examples.
In this case you seem to have discovered:
user-defined functions
pl/pgsql language functions
triggers
There is lots of excellent material and examples on how these things all work in the documentation.
David J.
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