Re: How to create trigger if it does not exist

Hi Guys,
Using CASCADE can be a bit dangerous as there might be other tables,
functions, views etc. that will be dropped but they are not meant to be.

Try this:

DO
$$
BEGIN
IF NOT EXISTS(SELECT *
                     FROM information_schema.triggers
                     WHERE event_object_table = 'tablename'
                     AND trigger_name = 'triggername'
                     )
                    THEN
                                 <Insert your create trigger syntx here>;


    END IF ;

END;
$$






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