Creating Procedures with IN and OUT Parameters

This section describes how to create a procedure with IN and OUT parameters.

To do more tests on CallableStatement objects, I created another stored procedure with IN and OUT parameters:

herong> mysql -u Herong -pTopSecret

mysql> USE HerongDB;
Database changed

mysql> -- Changing the command delimiter to '/'
mysql> DELIMITER '/';

mysql> -- Creating the procedure
mysql> CREATE PROCEDURE ReverseProcedure(IN String VARCHAR(80),
    ->   OUT Reversed VARCHAR(80), OUT Length INTEGER)
    -> BEGIN
    ->   SET Reversed = REVERSE(String);
    ->   SET Length = LENGTH(String);
    ->   SELECT String, Reversed, Length;
    -> END/
Query OK, 0 rows affected (0.00 sec)

mysql> -- Testing the procedure
mysql> CALL ReverseProcedure('Herong', @Reversed, @Length)/
+--------+----------+--------+
| String | Reversed | Length |
+--------+----------+--------+
| Herong | gnoreH   |      6 |
+--------+----------+--------+
1 row in set (0.00 sec)

Query OK, 0 rows affected (0.00 sec)

mysql> -- Checking the OUT parameters
mysql> SELECT @Reversed, @Length/
+-----------+---------+
| @Reversed | @Length |
+-----------+---------+
| gnoreH    |       6 |
+-----------+---------+
1 row in set (0.02 sec)

Table of Contents

 About This Book

 JDBC (Java Database Connectivity) Introduction

 JDK (Java SE) Installation

 MySQL Installation on Windows

 MySQL JDBC Driver (MySQL Connector/J)

 MySQL - PreparedStatement

 MySQL - Reference Implementation of JdbcRowSet

MySQL - JBDC CallableStatement

 Overview of CallableStatement Objects

 "CREATE PROCEDURE" - Creating a Simple Procedure

Creating Procedures with IN and OUT Parameters

 Creating Procedures with INOUT Parameters

 Creating Procedures with Multiple Queries

 Creating CallableStatement Objects with prepareCall()

 Capturing ResultSet with executeQuery()

 Creating CallableStatement Objects with Parameters

 Common Errors with CallableStatement Parameters

 Creating CallableStatement Objects with INOUT Parameters

 Retrieving Multiple ResultSet Objects

 Executing Stored Procedures without Permission

 getProcedures() - Listing Stored Procedures

 MySQL CLOB (Character Large Object) - TEXT

 MySQL BLOB (Binary Large Object) - BLOB

 Using Connection Pool with JDBC

 Archived Tutorials

 References

 Full Version in PDF/EPUB