Replacing special characters by null

Question

Hi,

Is there any function to replace the special characters by null in informatica

if we used replacestr function, i think we should specify all special characters

as follows replacestr(input,'!','~','@','#','$','%','^','&','*',null)

But we dont know what are teh special characters will be coming as input.

can u please let me know that which function will be suitable.