What version of slony?  


For 1.2 and earlier add the trigger via slonik and use store trigger if you want to enable it:

http://slony.info/documentation/1.2/stmtstoretrigger.html

For 2.0 and later use DISABLE/ENABLE [REPLICA|ALWAYS] TRIGGER in postgresql.




>________________________________
> From: Riya V <riyav at hotmail.com>
>To: slony1-general at lists.slony.info 
>Sent: Tuesday, 5 June 2012, 19:27
>Subject: [Slony1-general] creating a new trigger for a table on a slave host
> 
>
> 
>I need to modify my database schema and create a new trigger function. I know that triggers are suppressed on the slave once Slony starts up. However since slony is now already running on the slave, if I create a new trigger there, it will not be suppressed. What is the best practice for creating a trigger on the slave? Should you take the table out of replication, create trigger , then add the table back in? Is there some other way to do it? 
>Thanks!
>
>
>RV
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