title: Replacing special characters by null
body: <p>Is there any function to replace the special characters by null in informatica</p>
  
  <p>if we used replacestr function, i think we should specify all special characters </p>
  
  <p>as follows replacestr(input,'!','~','@','#','$','%','^','&amp;','*',null)</p>
  
  <p>But we dont know what are teh special characters will be coming as input.</p>
  
  <p>can u please let me know that which function will be suitable.</p>