In the above syntax, the language used to create the trigger function is PL/pgSQL but we can create it using any of the languages supported by PostgreSQL. The trigger function gets the information about its calling event through TriggerData, which contains some set of local variables. For exa...
CREATE TRIGGER: Syntax and execution order If you want to define a trigger, there are two things which have to be done: Define a function Create the trigger based on the function In the following section you will be guided through that process. ...
Summary: in this tutorial, you will learn how to use the PostgreSQL ALTER TRIGGER statement to rename a trigger. Introduction to PostgreSQL ALTER TRIGGER statement The ALTER TRIGGER statement allows you to rename a trigger. The following shows the syntax of the ALTER TRIGGER statement: ALTER TRIGG...
function_name A user-suppliedfunctionthatisdeclared as taking no argumentandreturningtypeevent_trigger.Inthe syntaxofCREATE EVENT TRIGGER, the keywordsFUNCTIONandPROCEDUREare equivalent, but the referencedfunctionmustinanycasebe afunction,notaprocedure. Theuseofthe keywordPROCEDUREhereishistoricalanddeprecated. ...
This topic provides reference information about migrating triggers from Microsoft SQL Server 2019 to Amazon Aurora PostgreSQL. It compares the trigger functionality between the two database systems, highlighting similarities and differences in syntax, scope, and usage. You’ll...
This post also discussed PostgreSQL key features, different operations associated with PostgreSQL triggers, their syntax, and example use cases. If you have any questions, comments, or suggestions, leave them in the comments section. About...
Stream triggers are designed to be trigger-like in syntax. They leverage the PostgreSQL BEFORE trigger architecture and are likely to have similar performance characteristics as PostgreSQL BEFORE triggers. Multiple trigger definitions can use one trigger function, just as with normal PostgreSQL triggers...
Basic Syntax The syntax for a trigger is: CREATE TRIGGER Trigger_Name On Table_Name For [INSERT], [UPDATE], [DELETE] AS ……Trigger Code Expanded Trigger Statement Formats SQL students also learn SQL ServerDatabase Management Systems (DBMS)Oracle SQLData AnalysisPostgreSQLBusiness Intelligence (BI...
syntax: create [or replace] trigger trigger_name timing event1 [or event2 or event3] on table_name trigger_body --- timing:before,after event:insert,update [of column],delete table_name: table/view name trigger body:begining with either declare or begin ending with end, or a call...
ALTERTRIGGERtrigger_nameDISABLE;Code language:PostgreSQL SQL dialect and PL/pgSQL(pgsql) In this syntax, you specify the name of the trigger that you want to disable after theALTER TRIGGERkeywords. For example, to disable the triggercustomers_audit_triggerof thecustomerstable, you use the followi...