How to use optional parameters in a MySQL Stored Procedure

I want to modify a SP in MySQL, but don't want it to crash apps currently using that SP.

The SP is: SP_CreateUserReport
Argument 1: Check4ItCode
Argument 2: PasscodeAdmin

Currently, the calling app sends something like:
Call SP_CreateUserReport('CfiCode','12324')

But I want to add a new argument to the SP:

Argument 3: DemoUserEmail

When I do that, and do the same call, the SP will not receive the 3rd new argument and fail.

Eventually, I will update the all the calls from various apps to add the 3rd argument value, But in the meantime, I want to make that 3rd argument optional till I can update all the calling apps. And, if that value is not there, store a NULL in the table for that field.

Here is a sample of the final code I wish to use.


CREATE DEFINER=`root`@`localhost` PROCEDURE `SP_CreateUserReport`(
Check4ItCode varchar(255) ,
PasscodeAdmin varchar(255),
DemoUserEmail varchar(255) 


Check4ItCode as CFICode, 
PasscodeAdmin AS AdminCode, 
DemoUserEmail as TheDemoUserEmail


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Walter RitzelSenior Software EngineerCommented:
According to the MYSQL team, this is a request since 2005, but so far, it was not implemented:

This means that you cannot accomplish what you want, so it is better to think in a different approach.


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askolitsAuthor Commented:
Oh well, I left a comment on the MySQL link you sent. Thanks for your help.

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