On 07/03/18 13:14, Stephen Frost wrote: > Greetings, > > * Noah Misch (n...@leadboat.com) wrote: >> On Tue, Mar 06, 2018 at 09:28:21PM -0500, Stephen Frost wrote: >>> * Tom Lane (t...@sss.pgh.pa.us) wrote: >>>> I wonder whether it'd be sensible for CREATE USER --- or at least the >>>> createuser script --- to automatically make a matching schema. Or we >>>> could just recommend that DBAs do so. Either way, we'd be pushing people >>>> towards the design where "$user" does exist for most/all users. Our docs >>>> comment (section 5.8.7) that "the concepts of schema and user are nearly >>>> equivalent in a database system that implements only the basic schema >>>> support specified in the standard", so the idea of automatically making >>>> a schema per user doesn't seem ridiculous on its face. (Now, where'd I >>>> put my flameproof long johns ...) >>> >>> You are not the first to think of this in recent days, and I'm hopeful >>> to see others comment in support of this idea. For my 2c, I'd suggest >>> that what we actually do is have a new role attribute which is "when >>> this user connects to a database, if they don't have a schema named >>> after their role, then create one." Creating the role at CREATE ROLE >>> time would only work for the current database, after all (barring some >>> other magic that allows us to create schemas in all current and future >>> databases...). >> >> I like the idea of getting more SQL-compatible, if this presents a distinct >> opportunity to do so. I do think it would be too weird to create the schema >> in one database only. Creating it on demand might work. What would be the >> procedure, if any, for database owners who want to deny object creation in >> their databases? > > My suggestion was that this would be a role attribute. If an > administrator doesn't wish for that role to have a schema created > on-demand at login time, they would set the 'SCHEMA_CREATE' (or whatever > we name it) role attribute to false. > Yeah I think role attribute makes sense, it's why I suggested something like DEFAULT_SCHEMA, that seems to address both schema creation (dba can point the schema to public for example) and also the fact that $user schema which is first in search_path might or might not exist.
Question would be what happens if schema is then explicitly dropper (in either case). -- Petr Jelinek http://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Training & Services
