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Date: Thu, 13 Mar 2003 14:37:10 -0800
From: Joe Conway <mail@joeconway.com>
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Subject: Re: Retrieving Definition for Composite Type
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Jordan S. Jones wrote:
> Basically, I need the SQL equivalent of psql's "\d composite_type"

Start psql with the -E option, and you can see all the internally 
generated queries. E.g (ex1_tup is a composite type):

psql -E regression

[snipped all the startup stuff]

regression=# \d ex1_tup
********* QUERY **********
SELECT c.oid,
   n.nspname,
   c.relname
FROM pg_catalog.pg_class c
      LEFT JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace
WHERE pg_catalog.pg_table_is_visible(c.oid)
       AND c.relname ~ '^ex1_tup$'
ORDER BY 2, 3;
**************************

********* QUERY **********
SELECT relhasindex, relkind, relchecks, reltriggers, relhasrules
FROM pg_catalog.pg_class WHERE oid = '1336877'
**************************

********* QUERY **********
SELECT a.attname,
   pg_catalog.format_type(a.atttypid, a.atttypmod),
   (SELECT substring(d.adsrc for 128) FROM pg_catalog.pg_attrdef d
    WHERE d.adrelid = a.attrelid AND d.adnum = a.attnum AND a.atthasdef),
   a.attnotnull, a.attnum
FROM pg_catalog.pg_attribute a
WHERE a.attrelid = '1336877' AND a.attnum > 0 AND NOT a.attisdropped
ORDER BY a.attnum
**************************

Composite type "public.ex1_tup"
  Column  | Type
---------+------
  relname | name
  colname | name

HTH,

Joe