Hi, On 2019-10-29 14:33:00 -0400, Tom Lane wrote: > Mitar <mmitar@xxxxxxxxx> writes: > > I think RowDescription should be extended to provide full recursive > > metadata about all data types. That would be the best way to do it. > > [ shrug... ] In a world where stability of the wire protocol were > of zero value, maybe we would do that. In the real world, don't > hold your breath. Hm. Wouldn't it be fairly easy to allow the client to specify how much metadata they'd want? I.e. opt-in into getting more complete metadata? Presumably a lot of clients/applications wouldn't want the server to do the extra work / use bandwidth for the full details anyway, so making a more expansive RowDescription be explicitly opt-in would be good, even if there were zero compatibility concerns. There's different ways we could do the opt-in. We could use the "_pq_." startup option stuff to opt in, we could make it an optional parameter to D messages (it'd be mildly hacky because unfortunately describe_target is not a counted text), we could use an additional describe_type etc... Greetings, Andres Freund
