> On 30/05/2023 22:23 CEST Lian Jiang <jiangok2006@gmail.com> wrote:
>
> I plan to create an event trigger to detect schema change (e.g. add/remove
> a column, change column type), and write it into a separate table (e.g.
> EVENTS). Then a process periodically reads this table to send schema change
> notification. However, the event trigger (https://www.postgresql.org/docs/current/plpgsql-trigger.html)
> (43.10.2. Triggers on Events) does not provide me info such as which table
> is altered, old and new schema. Am I missing something? Thanks very much for
> any hints.
You must use ddl_command_end event triggers[0] and call function
pg_event_trigger_ddl_commands[1] to get info such as altered table and column.
[0] https://www.postgresql.org/docs/current/event-trigger-definition.html
[1] https://www.postgresql.org/docs/current/functions-event-triggers.html
--
Erik