MySql #1243 Error While Executing It Through PhpMyAdmin

I am trying to execute this code in phpMyAdmin. But, I'm getting following error #1243 - Unknown prepared statement handler (stmt) given to EXECUTE SET @sql = NULL; SELECT GR

Solution 1:

That is because the PMA doesn't use the same mysql session to execute the queries that's why you receive the error.

But if you were to execute this in a script using the same mysql function it should work.