Re: 回复:回复:回复:A question about leakproof

2022-10-17 Thread Laurenz Albe
On Mon, 2022-10-17 at 16:24 +0800, qiumingcheng wrote: > > "you seem to be imagining that changes in a query's plan on the basis of > > changes > > in collected statistics have something to do with this.  They do not." > > 1. My understanding of the above paragraph is that for the same view and >

Re: 回复:回复:回复:A question about leakproof

2022-10-17 Thread Tom Lane
"qiumingcheng" writes: > 2. What's the reason about the function timestamp_gt_timestampz may cause > data leakage? Can you explain how it causes data leakage? It's capable of throwing an error (see timestamp2timestamptz_opt_overflow). Now, maybe that's unreachable, or maybe we could rerrange th