Addressing MySQL Error 1326 – SQLSTATE: 42000 (ER_SP_UNDECLARED_VAR): A Guide to Dealing with Undeclared Variables
When working with stored procedures and functions in MySQL, Error 1326 can be a common stumbling block. The error message “Undeclared variable: %s” indicates that you are attempting to use a variable that has not been properly declared within the scope of your stored routine. Understanding the Error MySQL requires that all variables used within …