Bug #24286 Triggers should be able to callback
Submitted: 14 Nov 2006 6:59 Modified: 26 Dec 2006 11:39
Reporter: Morgan Tocker Email Updates:
Status: Verified Impact on me:
None 
Category:MySQL Server: Stored Routines Severity:S4 (Feature request)
Version:5.2+ OS:
Assigned to: CPU Architecture:Any
Triage: Triaged: D5 (Feature request)

[14 Nov 2006 6:59] Morgan Tocker
Description:
If you run in an extremely high READ environment, the write cost of the trigger is minimal.  Having it be able to send a message (either via CLI, java method) to an application will mean that it can update/destroy cache for example.

(Think of how often a category definitions tables would change).

How to repeat:
* Create a trigger.
* Try and make it talk to your application

Suggested fix:
This can currently be emulated by writing a UDF that can talk back to your application via SQL functions.

i.e.
SELECT send_message('SQL_STRING_HERE');

What I am asking is that this become standardised as part of the core functionality.
[26 Dec 2006 11:39] Valeriy Kravchuk
Thank you for a reasonable feature request.