Question

http://www.postgresql.org/docs/8.4/static/functions-admin.html says:

pg_relation_size
accepts the OID or name of a table, index or toast table, and returns the size in bytes

However when I use it with a valid table name, I get the error:

column [table] does not exist…

I know my table exists, because doing

SELECT count(*) FROM [table]

returns a valid number. Any ideas?

Answer 1

Try explicitely adding the schema (e.g. ‘public’) where the table is located in the pg_relation_size call.

Like this (untested):

select pg_relation_size(public.mytablename) from pg_tables