title: Modify the metadata of a database
body: <p>This is simple, i have a database that contains many tables and what i want to do is to add a default value to all the fields that represent a boolean (a char(1 byte)). So is there a way to (using a function) write some logic that uses the meta-data of the database and its tables to add that default value without iterating manually on each field in each table ?</p>
  
  <p>Hope this is clear guys :)</p>