Re: Tablespace patch review

Tom Lane wrote:
> Gavin Sherry <swm(at)linuxworld(dot)com(dot)au> writes:
> > On Fri, 18 Jun 2004, Bruce Momjian wrote:
> >> * Allow reporting of which objects are in which tablespaces

This would have to be an external tool that connects to each database.

>
> > Do we need an information_schema.tablespaces view as well as an update to
> > information_schema.{tables|indexes|...} ?
>
> That would depend on your theology about whether implementation-specific
> additions to information_schema are a good idea or not. I'd lean
> against doing this myself. ISTM the entire point of information_schema
> is to be standard, and additions are, well, not. Worse, they might
> conflict with future extensions to the standard.
>
> I don't actually see a way *inside the database* to implement Bruce's
> TODO item; there's no way for a backend to look at the catalogs of other
> databases. We could look to see which databases had nonempty
> subdirectories of a tablespace, and report those databases by name, but
> explaining exactly what's inside those subdirectories is a lot harder.

The best we could do here is to just report the database name and the
relfilenode.

>
> It might be better to think about supporting this need with oid2name
> or some similar client-level tool. It's easy to see how oid2name
> might be extended to produce an output like
>
> Tablespace t1
> Database d1
> Table x
> Table y
> Database d2
> etc etc

Yep, that's what I was thinking --- an external tool.

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