I'm not sure that it's that simple in practice. MongoDB may fail to provide the same guarantees that Postgres UPSERT does, if not in theory then at least in pra

I'm not sure that it's that simple in practice. MongoDB may fail to provide the same guarantees that Postgres UPSERT does, if not in theory then at least in practice. In other words, it seems like retrying within client code is necessary when the Wired Tiger storage engine happens to be in use: https://stackoverflow.com/questions/29305405/mongodb-impossible-e11000-duplicate-key-error-dup-key-when-upserting https://stackoverflow.com/questions/29305405/mongodb-impossi...