Re: make \d pg_toast.foo show its indices ; and, \d toast show its main table ; and \d relkind=I show its partitions

> Find attached updated patches which also work against old servers.

I can't check that for sure.

* About toast table addition v7:

Patch applies cleanly, compiles, make check ok, no doc.

This addition show the main table of a toast table, which is useful.

Field relnamespace oid in pg_class appears with pg 7.3, maybe it would be
appropriate to guard agains older versions, with "pset.sversion >= 70300".
It seems that there are other unguarded instances in "describe.c", so
maybe this is considered too old.

Test is ok.

* About toast index v7:

Patch applies cleanly on top of previous, compiles, make check ok, no doc.

This patch simply enables an existing query on toast tables so as to show
corresponding indices.

Test is ok.

* About toast part v7.

Patch applies cleanly, compiles, make check ok, no doc.

It gives the partition info about an index as it is shown about a table,
which is useful.

There are some changes in the query on older systems, which seem harmless.
The code is rather simplified because a special case is removed, which is
a good thing.

Test is ok.

Marked as ready.

--
Fabien.