Re: System column xmin makes anonymity hard

2020-05-12 Thread Francisco Olarte
Johannes. On Tue, May 12, 2020 at 8:05 PM Johannes Linke wrote: > since 9.4, VACUUM FREEZE just sets a flag bit instead of overwriting xmin > with FrozenTransactionId [1]. This makes it harder to build applications with > a focus on data reduction. > We have an app that lets people anonymously

System column xmin makes anonymity hard

2020-05-12 Thread Johannes Linke
Hi! since 9.4, VACUUM FREEZE just sets a flag bit instead of overwriting xmin with FrozenTransactionId [1]. This makes it harder to build applications with a focus on data reduction. We have an app that lets people anonymously vote on stuff exactly once. So we save the vote in one table withou