-1 AND IFNULL(ASCII(SUBSTRING((SELECT @@VERSION),1,1)),0)>25
-1 AND IFNULL(ASCII(SUBSTRING((SELECT @@VERSION),1,1)),0)=1
-1 AND IFNULL(ASCII(SUBSTRING((SELECT @@VERSION),1,1)),0)>255
-1 AND IFNULL(ASCII(SUBSTRING((SELECT @@VERSION),1,1)),0)
-1 AND IFNULL(ASCII(SUBSTRING((SELECT @@VERSION),1,1)),0)>0