Vik Fearing <v...@postgresfriends.org> writes: > On 9/6/23 00:14, David G. Johnston wrote: >> I'm not all that for either A or B since the status quo seems workable.
> Pray tell, how is it workable? The view does not identify a specific > constraint because we don't obey the rules on one side and we do obey > the rules on the other side. It is completely useless and unworkable. What solution do you propose? Starting to enforce the spec's rather arbitrary requirement that constraint names be unique per-schema is a complete nonstarter. Changing the set of columns in a spec-defined view is also a nonstarter, or at least we've always taken it as such. If you'd like to see some forward progress in this area, maybe you could lobby the SQL committee to make constraint names unique per-table not per-schema, and then make the information_schema changes that would be required to support that. In general though, the fact that we have any DDL extensions at all compared to the standard means that there will be Postgres databases that are not adequately represented by the information_schema views. I'm not sure it's worth being more outraged about constraint names than anything else. Or do you also want us to rip out (for starters) unique indexes on expressions, or unique partial indexes? regards, tom lane