Question:  How can I execute a function that is defined in a package using Oracle/PLSQL?

Answer:  To execute a function that is defined in a package, you'll have to prefix the function name with the package name.

          

package_name.function_name (parameter1, parameter2, ... parameter_n)

        

You can execute a function a few different ways.

Solution #1

First, we'll take a look at how to execute a function using a test block. Below we've declared a variable called result that is a number. We've passed in a value of 15000 into the function and the result of the function will be returned to the variable called result.

          

            

declare
    result number;
               begin
    -- Call the function
    result := package_name.function_name (15000);
               end;

          

        

Solution #2

We can also execute a function by running an SQL statement. For example:

          

select package_name.function_name (15000)
             from dual;