CodePudding user response:
Update is missing, you and zhang to get to a data version: CA, but zhang SAN after you submit, your update are missing, how to do? You can pull the data to the data after lock, so he took when zhang SAN in the update to the data and do not match the data version now,CodePudding user response:
Zhang SAN want to continue to update all need to pull the data of the new version: NCA