On Wed, 9 Sep 2009, decibel wrote:
> What might be more useful is a view that takes the guesswork out of using
> pg_depend. Namely, convert (ref)classid into a catalog table name (or better
> yet, what type of object it is), (ref)objid into an actual object name, and
> (ref)objsubid into a real name.
Here's V1 of a depend unraveler I needed recently and that's saved me a
bunch of time:
SELECT c1.oid as relid, n1.nspname || '.' || c1.relname as relation, c1.relkind, CASE WHEN c1.relkind='r' THEN
'table' WHEN c1.relkind='i' THEN 'index' WHEN c1.relkind='S' THEN 'sequence' WHEN c1.relkind='v' THEN 'view'
WHENc1.relkind='c' THEN 'composite' WHEN c1.relkind='t' THEN 'TOAST' ELSE '?' END as "kind", c2.oid as relid,
n2.nspname|| '.' || c2.relname as dependency, c2.relkind, CASE WHEN c2.relkind='r' THEN 'table' WHEN
c2.relkind='i'THEN 'index' WHEN c2.relkind='S' THEN 'sequence' WHEN c2.relkind='v' THEN 'view' WHEN
c2.relkind='c'THEN 'composite' WHEN c2.relkind='t' THEN 'TOAST' ELSE '?' END as "kind"
FROM pg_depend d, pg_class c1, pg_namespace n1, pg_class c2, pg_namespace n2
WHERE d.objid = c1.oid AND c1.relnamespace = n1.oid AND n1.nspname NOT IN('information_schema', 'pg_catalog') AND
n1.nspname!~ '^pg_toast' AND
d.refobjid = c2.oid AND c2.relnamespace = n2.oid AND n2.nspname NOT IN('information_schema', 'pg_catalog') AND
n2.nspname!~ '^pg_toast' AND
c1.oid != c2.oid
GROUP BY n1.nspname,c1.relname,c1.oid,c1.relkind, n2.nspname,c2.relname,c2.oid,c2.relkind
ORDER BY n1.nspname,c1.relname;
I could throw this on the Wiki as a code snippet if anyone else wanted to
tinker with it.
--
* Greg Smith gsmith@gregsmith.com http://www.gregsmith.com Baltimore, MD
