box.rollback_to_savepoint()

box.rollback_to_savepoint(savepoint)

Do not end the transaction, but cancel all its data-change and box.savepoint() operations that were done after the specified savepoint.

Return:	error if the savepoint cannot be set in absence of active transaction.

Possible errors: error if the savepoint does not exist.

Example:

function f()
  box.begin()           -- start transaction
  box.space.t:insert{1} -- this will not be rolled back
  local s = box.savepoint()
  box.space.t:insert{2} -- this will be rolled back
  box.rollback_to_savepoint(s)
  box.commit()          -- end transaction
end