Re: pg_class.relpages

On Sat, Sep 27, 2003 at 08:26:16PM -0400, Bruce Momjian wrote:
> Bertrand Petit wrote:
> > 
> >     Does the figures stored in pg_class.relpages include the pages
> > consumed by the toast tables linked to a normal table?
> 
> No.  See the chapter on monitoring disk space for more information.
Okay. I eventually wrote the following query that lists tables
and indices sizes. A view similar to this query might my useful for
the general public if defined in the information schema.

SELECT pg_namespace.nspname AS schema,COALESCE((SELECT class3.relname          FROM pg_class AS class3, pg_index
 WHERE class1.oid=pg_index.indexrelid AND           class3.oid=pg_index.indrelid),         class1.relname) AS
table,CASEWHEN class1.relkind='r' THEN NULL ELSE class1.relnameEND AS index,(SELECT
COALESCE(class1.relpages+SUM(class2.relpages),                class1.relpages) * 8 FROM pg_class AS class2 WHERE
class2.oidIN (class1.reltoastrelid,                      class1.reltoastidxid)) AS size
 
FROM pg_class AS class1, pg_namespace
WHERE class1.relnamespace = pg_namespace.oid ANDpg_namespace.nspname NOT IN ('pg_catalog',
'information_schema',                            'pg_toast') ANDclass1.relkind IN ('r', 'i')
 
ORDER BY class1.relnamespace ASC, class1.relname ASC,class1.relkind DESC


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