Question

At school, we are learning to write triggers in SQL and I wrote one, but it’s wrong. Therefore, I would like to delete it.

I tried the following:

mysql> use information_schema
Database changed
mysql> drop trigger log;
ERROR 1360 (HY000): Trigger does not exist

But as you see, I get an error because it does not exist.
When I use Sequel Pro and check that table with select * from triggers;, it shows me there IS a trigger called log. See screenshot:

I tried removing it by right-clicking and click on “delete row”, but then I get the following error:

Couldn’t delete rows.

MySQL said: Access denied for user ‘robbert’@’localhost’ to database ‘information_schema’

How am I supposed to remove that trigger? It’s clearly there?

Answer 1

The TRIGGER_SCHEMA column indicates the database in which your trigger is defined: you’ll need to USE db5, not INFORMATION_SCHEMA (or else qualify the trigger name in the DROP TRIGGER statement):

USE db5;
DROP TRIGGER log;

Or:

DROP TRIGGER db5.log;