Handling Room Database Migrations

We must perform database migrations whenever we change the table schemas—that is, modify, add, or delete a field in an existing table or add a new table. The app should gracefully handle all the database upgrades for both new and existing users. If all the upgrade scenarios aren’t handled, it may cause the app to crash or may corrupt users’ data.

Database migrations

Database migrations can either be automatic or manual. In this section, we’ll learn about both kinds of migrations.

To refresh our memories, let’s look at the MyDatabase class we defined in the “Working with Room Databases” lesson.