PostgreSQL: Disabling Triggers with ALTER TABLE
Temporarily disable triggers in PostgreSQL using the ALTER TABLE command. This guide provides syntax and examples for disabling triggers.
PostgreSQL DISABLE TRIGGER
Disabling Triggers in PostgreSQL
This section explains how to disable triggers in PostgreSQL using the ALTER TABLE command. We'll cover the syntax and provide examples.
What is the PostgreSQL DISABLE TRIGGER command?
To disable a trigger, use the DISABLE TRIGGER command within an ALTER TABLE command.
Syntax of PostgreSQL Disable Trigger using ALTER TRIGGER
The syntax is:
Syntax
ALTER TABLE table_name
DISABLE TRIGGER trigger_name | ALL
Parameters
| Parameter | Description |
|---|---|
table_name |
The name of the table where the trigger is defined. This comes after the ALTER TABLE keywords. |
trigger_name |
The name of the trigger you want to disable. This comes after DISABLE TRIGGER. |
ALL |
Use this keyword to disable all triggers associated with the table. |
Note: Disabling a trigger prevents its execution. Even if a related database event occurs, the disabled trigger won't run.
Example: Disabling a Trigger
Let's disable a trigger on a table named Clients (assuming this table and trigger already exist).
Disabling a Specific Trigger
This command disables the trigger named First_name_changes on the Clients table:
Example
ALTER TABLE Clients
DISABLE TRIGGER First_name_changes;
The output will confirm that the trigger has been disabled.
Disabling All Triggers on a Table
To disable all triggers on the Clients table, use:
Example
ALTER TABLE Clients
DISABLE TRIGGER ALL;
The output will confirm that all triggers have been disabled.
Overview
We've learned how to use PostgreSQL DISABLE TRIGGER with the ALTER TABLE command to disable specific triggers or all triggers associated with a table.