Using ODI variables and procedures

Using variables and procedures in Oracle Data Integrator (ODI) allows you to create reusable and flexible data integration processes. Let’s explore how to use variables and procedures in ODI:

Using Variables:

1. Declare Variables in Procedures:
   • When creating a procedure in ODI, you can declare variables to store and manipulate values.
   • Declare variables using the DECLARE statement within the procedure’s PL/SQL code.
   • Specify the variable name, data type, and optional initial value.
   • For example, to declare a variable named “v_employee_count” of type NUMBER with an initial value of 0:cal DECLARE v_employee_count NUMBER := 0; BEGIN -- Procedure code goes here END;
2. Assign Values to Variables:
   • Variables can be assigned values using the assignment operator (:=) within the procedure.
   • You can assign a static value or use expressions to calculate the value dynamically.
   • For example, to assign the value 10 to the variable “v_employee_count”: v_employee_count := 10;
3. Use Variables in Procedures:
   • Variables can be used within the procedure’s PL/SQL code to perform calculations, store intermediate results, or control the flow of execution.
   • You can reference variables in SELECT statements, conditions, loops, or any other part of the PL/SQL code.
   • For example, to use the variable “v_employee_count” in a SELECT statement:SELECT * INTO some_variable FROM employees WHERE employee_count > v_employee_count;

Using Procedures:

1. Create a Procedure:
   • In the Designer Navigator, navigate to the project where you want to create the procedure.
   • Right-click on the “Procedures” folder and select “New Procedure.”
   • Specify a name and an optional description for the procedure.
   • In the procedure editor, define the PL/SQL code that constitutes the procedure’s logic.
   • Save the procedure.
2. Call a Procedure:
   • Procedures can be called from various components in ODI, such as interfaces, packages, or other procedures.
   • To call a procedure, use the CALL statement followed by the procedure name and any required parameters.
   • For example, to call a procedure named “proc_update_employees”: CALL proc_update_employees;
3. Pass Parameters to Procedures:
   • Procedures can accept input and output parameters to facilitate data transfer and interaction with other components.
   • Parameters are defined in the procedure’s signature and can be accessed within the procedure’s PL/SQL code.
   • Parameters can be of various data types, such as VARCHAR2, NUMBER, or DATE.
   • For example, to define a procedure with an input parameter: CREATE OR REPLACE PROCEDURE proc_update_employees(p_employee_id IN NUMBER) IS BEGIN -- Procedure code goes here END;
4. Return Values from Procedures:
   • Procedures can have output parameters to return values back to the calling component.
   • Output parameters are defined in the procedure’s signature and can be assigned values within the procedure.
   • The calling component can access the returned values after the procedure execution.
   • For example, to define a procedure with an output parameter: CREATE OR REPLACE PROCEDURE proc_update_employees(p_employee_id IN NUMBER, p_employee_name OUT VARCHAR2) IS BEGIN -- Procedure code goes here p_employee_name := 'John Doe'; END;

By effectively utilizing variables and procedures in ODI, you can enhance the flexibility and reusability of your data integration processes, enabling dynamic calculations, parameterization, and modularization of logic.