Give me SAFETY!

• A recipe for safety

  • Use transactions (don't use AutoCommit)
  • Use RaiseError
  • Use eval { … } to catch errors and rollback

Previous slide

Next slide

Back to first slide

View graphic version

Classic example:

bank account transfer:

debit one account

credit another account

must be an ‘atomic’ operation.

Can’t allow debit without the credit.

Server-side errors: disk crash etc

Client side errors: program die()’s or is killed