title: User Defined Functions in Presto
body: <p>I am currently working with Presto 0.80. I have to write a user defined function to convert degree celsius to degree fahrenheit during select query. I did the same using Hive QL but was wondering if we can replicate the same in Facebook Presto.</p>
  
  <p>Any help would be highly appreciated.</p>
  
  <p>Thanks!!</p>