PostgreSQL Documentation 16 43 10 Trigger Functions
A data change trigger is declared as a function with no arguments and a return type of trigger Note that the function must be declared with no arguments even if it expects to receive some arguments specified in CREATE TRIGGER such arguments are passed via TG ARGV as described below
Get Table Name of PostgreSQL Event Trigger Stack Overflow, 1 For CREATE TABLE and DROP TABLE you can save list of tables which you currently have and then comparing which values are added or removed using information schema tables so you can catch table name This is more difficult for ALTER TABLE Oto Shavadze Mar 31 2020 at 10 36
How to check which table is called which trigger in postgresql
3 Answers Sorted by 2 You need to join that to pg class SELECT trg tgname ns nspname tbl relname as trigger table FROM pg trigger trg JOIN pg class tbl on trg tgrelid tbl oid JOIN pg namespace ns ON ns oid tbl relnamespace WHERE NOT tgisinternal Share Improve this answer Follow answered Nov 9 2016 at 9 30 user1822 Add a comment 2
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 16 CREATE TRIGGER
PostgreSQL Documentation 16 CREATE TRIGGER, 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
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Postgresql How to get the table name in a PostgreSQL trigger function
Postgresql How to get the table name in a PostgreSQL trigger function The only thing that would change from first function above is the last value in the INSERT statement within the function instead of Users it would be Ledgers or Journal or whatever Within a PostgreSQL trigger function how do I get the name of the table that the OLD row belongs too
PostgreSQL Triggers And Isolation Levels Vlad Mihalcea
Here are two options for listing out the triggers in a PostgreSQL database The information schema triggers View This view contains all functions and procedures in the current database that the current user owns or has some privilege other than SELECT on Here s an example of returning a list of triggers 2 Ways to List all Triggers in a PostgreSQL Database. 1 Renaming a Trigger ALTER TRIGGER name ON table name RENAME TO new name 2 Marking a PostgreSQL trigger as being dependent on an extension ALTER TRIGGER name ON table name NO DEPENDS ON EXTENSION extension name In the above syntax name is the name of the trigger you want to alter CREATE OR REPLACE FUNCTION fnJobQueueBEFORE RETURNS trigger AS DECLARE shadowname varchar TG TABLE NAME shadow BEGIN INSERT INTO shadowname VALUES OLD RETURN OLD END LANGUAGE plpgsql I e inserting values into a table with a dynamically generated name Executing the code above yields
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