| From: | Peter Eisentraut <peter_e(at)gmx(dot)net> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | Susanne Ebrecht <susanne(at)2ndQuadrant(dot)com>, Ingmar Brouns <swingi(at)gmail(dot)com>, pgsql-bugs(at)postgresql(dot)org |
| Subject: | Re: BUG #5926: information schema dtd_identifier for element_types, columns, parameters views inconsistent |
| Date: | 2011-06-09 15:00:30 |
| Message-ID: | 1307631630.24477.8.camel@vanquo.pezone.net |
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| Lists: | pgsql-bugs pgsql-docs |
On ons, 2011-06-08 at 11:09 -0400, Tom Lane wrote:
> As far as I can tell from the spec, dtd_identifier
> ought to be the identifier of the element type, while
> collection_type_identifier should be a made-up identifier for the
> array type. That would make the sample query given in the docs
> correct.
But it's collection_type_identifier that you join against, say, columns,
so you can resolve the element type of column types. So
collection_type_identifier must match the dtd_identifier schema of
columns etc., whereas element_types.dtd_identifier is not joinable
against anything.
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