Create function report error, prompting DECLARE definition syntax problem

To solve the error report, refer to declare when mysql imports stored proceduresError reporting problem solving

Add the following line before the create function code

 delimiter //

Of course another error may be reported to solve the above problem, refer to This function has none of DETERMINISTIC, NO SQL, or READS SQL DATA in its de error solution

Change database log_bin_trust_function_creators trust

set global log_bin_trust_function_creators=TRUE;

It's fine after that