How To Call A Stored Procedure From Another Stored Procedure In PostgreS...

In this tutorial, we explore a powerful feature of PostgreSQL: calling a stored procedure from another stored procedure using PL/pgSQL. This capability allows you to create more modular and organized database operations, making your code easier to maintain, reuse, and manage.

The video starts by introducing the concept of stored procedures in PostgreSQL and explains why you might want to call one stored procedure from another. We then dive into the syntax and structure required to implement this technique, providing clear, step-by-step instructions. You'll see how to pass parameters between procedures, handle return values, and manage potential errors effectively.

Additionally, the tutorial includes practical examples that demonstrate how nested stored procedures can be used in real-world database applications, such as managing complex business logic, automating repetitive tasks, or structuring large codebases. We also cover best practices for writing PL/pgSQL code, ensuring that your stored procedures are efficient, readable, and maintainable.

By the end of this video, you'll have a solid understanding of how to leverage nested stored procedures in PostgreSQL, enabling you to build more sophisticated and flexible database applications.

Whether you’re a database administrator, developer, or just looking to deepen your PostgreSQL knowledge, this tutorial provides the insights and techniques you need to effectively use stored procedures in PL/pgSQL.

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/*In this video we will see how to call a stored procedure 

from another stored procedure in PostgreSQL PLpgSQL*/

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CREATE OR REPLACE PROCEDURE public.proc1()

LANGUAGE 'plpgsql'

AS $BODY$

DECLARE

BEGIN

 RAISE NOTICE 'This is proc 1, it will be called from proc2';

END;

$BODY$;

-- This is proc1 I have created

-- This will display the output

-- so, lets create it

CREATE OR REPLACE PROCEDURE public.proc2()

LANGUAGE 'plpgsql'

AS $BODY$

DECLARE

BEGIN

RAISE NOTICE 'This is proc 2';

-- Calling another procedure proc1()

call proc1(); -- here it is

END;

$BODY$;

-- This is proc2

-- I am calling proc1 inside proc2

-- When it gets executed, it should give output like this

-- 'This is proc 2'

-- 'This is proc 1, it will be called from proc2'

-- Now, lets call the procedure

-- In the next video, I will show how to call a parameterized procedure or function with

-- OUT parameter

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call proc2();

-- As shown, the procedure is getting called from another procedure

-- Thanks for watching

-- Please leave your comment for the video

-- Source codes you will find from video description