Hi, On 2019-05-16 14:28:03 +0100, Dean Rasheed wrote: > 5). Some columns from pg_statistic_ext have to be made visible for > psql \d to work. Basically, it needs to be able to query for the > existence of extended statistics, but it doesn't need to see the > actual statistical data. Of course, we could change psql to use the > view, but this way gives us better backwards compatibility with older > clients. > > This is still going to break compatibility of any user code looking at > stxndistinct or stxdependencies from pg_statistic_ext, but at least it > doesn't break old versions of psql.
Hm, it's not normally a goal to keep old psql working against new postgres versions. And there's plenty other issues preventing a v11 psql to work against 12. I'd not let this guide any design decisions. Greetings, Andres Freund
