2008/10/22 Ma. Cristina Peña C.
<mpena@sensacd.com.mx>I want to use a function in to a trigger
This is my
CREATE FUNCTION "subradio"(integer) RETURNS integer AS 'select cast(count (claveubica) as integer ) from asradios where ubicacion =0;' LANGUAGE 'sql';
And my ttrigger is
CREATE TRIGGER validaradios AFTER DELETE ON subestacion FOR EACH ROW EXECUTE PROCEDURE subradio(0);
But I got an error
ERROR: CreateTrigger: function subradio() does not exist
What can I do??
A trigger function must have a specific structure, it takes no arguments and returns "trigger". Besides, trigger functions are supposed to do some processing before or after insert, update or delete operations, so there's no sense in returning a row count.
Take a look at the docs, specially chapter 35 and 38.9.
Cheers.
