title: Alter constraint in production database
body: <p>I have to alter a constraint in production database. Can i drop the constraint and recreate it again? But the table is having millions of records in prod environment. Will it be a problem?</p>
  
  <p>just alter constraint for on delete cascade.</p>
  
  <p>Do i have to rename the table and create table with original table name with proper constraints and import data from renamed table? I am more concerned about the prod database records.</p>
  
  <p>Please advice.</p>