How do I drop a trigger in PostgreSQL?

How do I drop a trigger in PostgreSQL?

To drop a PostgreSQL trigger, we use the DROP TRIGGER statement with the following syntax: DROP TRIGGER [IF EXISTS] trigger-name ON table-name [ CASCADE | RESTRICT ]; The trigger-name parameter denotes the name of the trigger that is to be deleted.

Can not drop trigger?

“Cannot drop the trigger ‘trigger_name’, because it does not exist or you do not have permission.” It could be because you’re missing the ON ALL SERVER argument. When you create a logon trigger, you use the ON ALL SERVER argument. This argument applies the scope of the trigger to the current server.

Which three events can activate a trigger Postgres?

One of INSERT, UPDATE, DELETE, or TRUNCATE; this specifies the event that will fire the trigger. Multiple events can be specified using OR.

How to drop a trigger from a table in PostgreSQL?

In PostgreSQL, the DROP TRIGGER statement is used to drop a trigger from a table. Syntax: DROP TRIGGER [IF EXISTS] trigger_name ON table_name [ CASCADE | RESTRICT ]; Let’s analyze the above syntax: First, specify the name of the trigger which you want to delete after the DROP TRIGGER keywords.

When to use restrict in the drop trigger statement?

Fifth, use RESTRICT TO refuse to drop the trigger if any objects depend on it. By default, the DROP TRIGGER statement uses RESTRICT. First, create a function that validates the username of a staff. The username of staff must not be null and its length must be at least 8.

Do you throw an error if the trigger does not exist?

Do not throw an error if the trigger does not exist. A notice is issued in this case. The name of the trigger to remove. The name (optionally schema-qualified) of the table for which the trigger is defined. Automatically drop objects that depend on the trigger. Refuse to drop the trigger if any objects depend on it. This is the default.