Postgres creating trigger functions with arguments
You don t define parameters for a trigger function but you can still specify arguments to it in the CREATE TRIGGER statement These arguments have to be constants and will be available to the trigger function via the TG ARGV array That way you can parameterize the trigger for each table for example by passing the names of tables and columns the trigger should operate on
The Ultimate Guide To The PostgreSQL Triggers, PostgreSQL Triggers A PostgreSQL trigger is a function invoked automatically whenever an event such as insert update or delete occurs In this section you will learn about triggers and how to manage them effectively Introduction to PostgreSQL trigger give you a brief overview of PostgreSQL triggers why you should use triggers and
PostgreSQL Documentation 13 9 28 Trigger Functions
Trigger Functions While many uses of triggers involve user written trigger functions PostgreSQL provides a few built in trigger functions that can be used directly in user defined triggers These are summarized in Table 9 97 Additional built in trigger functions exist which implement foreign key constraints and deferred index constraints
PostgreSQL Documentation 8 0 Triggers, A trigger can be defined to execute before or after an INSERT UPDATE or DELETE operation either once per modified row or once per SQL statement If a trigger event occurs the trigger s function is called at the appropriate time to handle the event The trigger function must be defined before the trigger itself can be created
Postgresql How to execute a trigger procedure with an expression as
Postgresql How to execute a trigger procedure with an expression as , How can I pass an expression as an argument when calling a trigger function create trigger my trigger after insert on my table for each row execute function trigger job job name
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PostgreSQL Triggers and Stored Function Basics Severalnines
PostgreSQL Triggers and Stored Function Basics Severalnines EXAMPLE 6 Elevated Privileges So far all the example code above has been executed at the database owner level by the postgres login role so any of our anti tampering efforts could be obviated that s just a fact of the database owner super user privileges Our final example illustrates how triggers and stored functions can be used to allow the execution of code by a non privileged
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Basically you can have as many BEFORE and as many AFTER triggers as you like The important thing is that the execution order of the triggers is deterministic since PostgreSQL 7 3 How to write a trigger in PostgreSQL Tutorial CYBERTEC. For anyone else who comes across this ion I wound up encoding my arrays as strings and then using string to array to decode inside the trigger function CREATE OR REPLACE FUNCTION example function RETURNS TRIGGER AS DECLARE special names text special users text BEGIN special names string to array TG ARGV 0 special users string to array TG ARGV 1 IF Description CREATE TRIGGER creates a new trigger CREATE OR REPLACE TRIGGER will either create a new trigger or replace an existing trigger The trigger will be associated with the specified table view or foreign table and will execute the specified function function name when certain operations are performed on that table To replace the current definition of an existing trigger use
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