Обсуждение: User-defined types

Anyone know of a quick and dirty query that can retrieve the various type
definitions ? I am looking to retrieve the schema-equivalent representation
of a custom (user-defined) types.

"codeWarrior" <gpatnude@hotmail.com> writes:
> Anyone know of a quick and dirty query that can retrieve the various type
> definitions ? I am looking to retrieve the schema-equivalent representation
> of a custom (user-defined) types.

Invoking "pg_dump -s" is by far the most future-proof approach.

            regards, tom lane

I figured it out....

BTW: I was thinking more along the lines of:

SELECT PT.*, PA.* FROM pg_attribute PA
JOIN pg_type PT ON PA.attrelid = PT.typrelid
JOIN pg_class PC ON PC.oid = PA.attrelid
WHERE PT.typnamespace = 2200 AND PA.attnum > 0 AND PC.relkind IN ('r', 'c',
'v');


Perhaps this should be made into a view in the information_schema.....




Regards,
Gregory P. Patnude
Vice President - Applications & Innovations Group

iDynaTECH, Inc
665 North Riverpoint Blvd
Spokane, WA 99202

(509) 343-3104 [voice]
(208) 691-6198 [cellular]
http://www.idynatech.com






"Tom Lane" <tgl@sss.pgh.pa.us> wrote in message
news:15086.1144434800@sss.pgh.pa.us...
> "codeWarrior" <gpatnude@hotmail.com> writes:
>> Anyone know of a quick and dirty query that can retrieve the various type
>> definitions ? I am looking to retrieve the schema-equivalent
>> representation
>> of a custom (user-defined) types.
>
> Invoking "pg_dump -s" is by far the most future-proof approach.
>
> regards, tom lane
>
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"codeWarrior" <gpatnude@hotmail.com> writes:
> BTW: I was thinking more along the lines of:

> SELECT PT.*, PA.* FROM pg_attribute PA
> JOIN pg_type PT ON PA.attrelid = PT.typrelid
> JOIN pg_class PC ON PC.oid = PA.attrelid
> WHERE PT.typnamespace = 2200 AND PA.attnum > 0 AND PC.relkind IN ('r', 'c',
> 'v');

> Perhaps this should be made into a view in the information_schema.....

It seems like the COLUMN_UDT_USAGE view ought to handle this ...
except perhaps that COLUMN_UDT_USAGE for some reason substitutes the
underlying type if the column type is a domain.  I can't see the
justification for that --- Peter, what part of the spec led you to do
it that way?  There is probably more than one way to define the spec's
notion of "user-defined types" in terms of Postgres notions, but I
don't see where you got this particular definition.

            regards, tom lane