How stored procedure works in PostgreSQL?

Question

PostgreSQL allows the users to extend the database functionality with the help of user-defined functions and stored procedures through various procedural language elements, which are often referred to as stored procedures. The store procedures define functions for creating triggers or custom aggregate functions. 24 февр. 2022 г.

How do I run a stored procedure in PostgreSQL?

To execute PROCEDURE in PostgreSQL, use the CALL statement instead of SELECT statement. This is one of the differences between PROCEDURE and FUNCTION. postgres=# CALL procedure1 ( ' CREATE PROCEDURE functionality supported in PostgreSQL 11! ' );

How does a stored procedure work?

A stored procedure is a prepared SQL code that you can save, so the code can be reused over and over again. So if you have an SQL query that you write over and over again, save it as a stored procedure, and then just call it to execute it.

How do I create a stored procedure with parameters in PostgreSQL?

PostgreSQL 11 introduced stored procedures that support transactions.1First, specify the name of the stored procedure after the create procedure keywords.2Second, define parameters for the stored procedure. ... 3Third, specify plpgsql as the procedural language for the stored procedure.

Can we call stored procedure from function in PostgreSQL?

Yes, that's the standard way, and yes it's weird. Usually you'd write such functions as stored procedures and invoke them with the CALL or EXECUTE command. PostgreSQL does not support true stored procedures (multiple result sets, autonomous transactions, and all that) though, only sql-callable user-defined functions.

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