About Programming - IBM i Stored Procedures
An IBM i Stored Procedure is like a handy mini-program stored within your database. It's essentially a pre-built SQL or external routine that you can execute with a simple CALL statement, saving you from rewriting the same logic repeatedly.
This lesson introduces stored procedures on the IBM i platform, focusing on SQL stored procedures and RPGLE stored procedures. You will learn the concepts, syntax, and practical applications of creating and using stored procedures in both SQL and RPGLE to enhance application modularity and performance.
Learning Objectives
By the end of this lesson, students will be able to:
Understand the purpose and benefits of stored procedures in IBM i applications.
Create, call, and manage SQL stored procedures using IBM i SQL.
Develop RPGLE stored procedures and integrate them with IBM i applications.
Compare the use cases for SQL and RPGLE stored procedures.
Debug and handle errors in stored procedures.
Module Content
An IBM i Stored Procedure is like a handy mini-program stored within your database. It's essentially a pre-built SQL or external routine that you can execute with a simple CALL statement, saving you from rewriting the same logic repeatedly.
Learn how to write and run a simple SQL and RPGLE Stored Procedures on your IBM i System. This lesson walks you through the syntax, structure, and execution steps using real examples. You’ll use CREATE PROCEDURE, define parameters, and run your procedure with CALL.
To test an IBM i (AS/400) SQL stored procedure that returns two values, you need to understand how those values are returned. This lesson will show you the essentials, and show a simple SQL script to test any stored procedure on your IBM i System.
Let's dive into writing and testing our a simply SQL based stored procedure. We will create a file, write an SQL script to read that file, and define a stored proc to call that SQL and return the results. Sounds like fun!
An IBM i SQLRPGLE stored procedure is a user-defined program or routine stored in the IBM i system's database (DB2 for i) that can be called from a client application, another program, or a database interface to perform a specific task or set of operations. It encapsulates business logic or database operations, allowing for modularity, reusability, and improved performance in applications running on the IBM i platform.
An IBM i RPGLE stored procedure is a user-defined program or routine stored in the IBM i system's database (DB2 for i) that can be called from a client application, another program, or a database interface to perform a specific task or set of operations. This example uses DB2 native file IO for direct access from the RPG program.
Instructions for Retrieving and Rebuilding IBM i Stored Procedures: Stored procedures on IBM i (formerly AS/400) are reusable database routines that can be invoked via SQL.
SQL stored procedures: Written entirely in SQL Procedural Language (PSM), compiled into an underlying ILE C program with embedded SQL.
External stored procedures: Registered SQL wrappers around external programs or service programs (e.g., written in RPG, COBOL, CL, or C). The "source" here is typically the CREATE PROCEDURE statement that registers the procedure, not the underlying program's code.
