reltoastidxid altenates in postgresql 9.4

Hi All,

I am using the following code to know how much disk space could be saved after deleting certain tables (as a parameter to this function )

CREATE OR REPLACE FUNCTION Get_Tables_Recovery_Size( IN tableNames text[] )
RETURNS TABLE( table_size bigint )
AS
$$
DECLARE
BEGIN
RETURN QUERY
(
SELECT COALESCE(SUM( ALLTABLE.totalsize ),0)::bigint FROM
(
SELECT
relname,
(tablesize+indexsize+toastsize+toastindexsize) AS totalsize
FROM
(
SELECT ns.nspname, cl.relname, pg_relation_size(cl.oid) AS tablesize,
COALESCE(
(SELECT SUM(pg_relation_size(indexrelid))::bigint FROM pg_index WHERE cl.oid=indrelid), 0
) AS indexsize,
CASE
WHEN reltoastrelid = 0 THEN 0
ELSE
pg_relation_size(reltoastrelid)
END AS toastsize,

CASE
WHEN reltoastrelid = 0 THEN 0
ELSE
pg_relation_size((SELECT reltoastidxid FROM pg_class ct WHERE ct.oid = cl.reltoastrelid))
END AS toastindexsize
FROM
pg_class cl,
pg_namespace ns

WHERE
pg_relation_size(cl.oid) != 0 AND
cl.relnamespace = ns.oid AND
ns.nspname NOT IN ('pg_catalog', 'information_schema') AND
cl.relname IN
(SELECT table_name FROM information_schema.tables WHERE table_type = 'BASE TABLE')
) ss
WHERE
relname IN ( SELECT $1[i] FROM generate_subscripts($1, 1) g(i) )
) ALLTABLE
);
END;
$$ LANGUAGE plpgsql;

After migrated 9.4. I am getting error that reltoastidxid is not present in pg_class. Due to REINDEX CONCURRENTLY this column removed. http://www.postgresql.org/message-id/E1UuRj8-0001au-F9@gemulon.postgresql.org

Would you please tell me how to modify this code.

With best regards,
Ramkumar Yelai

Siemens Technology and Services Private Limited
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