text: --
  --  Author: Hari Sekhon
  --  Date: 2020-08-05 17:54:19 +0100 (Wed, 05 Aug 2020)
  --
  --  vim:ts=2:sts=2:sw=2:et:filetype=sql
  --
  --  https://github.com/HariSekhon/SQL-scripts
  --
  --  License: see accompanying Hari Sekhon LICENSE file
  --
  --  If you're using my code you're welcome to connect with me on LinkedIn and optionally send me feedback to help steer this or other code I publish
  --
  --  https://www.linkedin.com/in/HariSekhon
  --
  
  -- PostgreSQL tables by size, excluding catalog and information schema
  --
  -- Tested on PostgreSQL 8.4, 9.x, 10.x, 11.x, 12.x, 13.0
  
  SELECT
    --nspname || '.' || relname AS relation,
    nspname,
    relname,
    pg_size_pretty(pg_total_relation_size(C.oid)) AS total_size
  FROM
    pg_class C
  LEFT JOIN
    pg_namespace N ON (N.oid = C.relnamespace)
  WHERE
    nspname NOT IN ('pg_catalog', 'information_schema')
      AND
    C.relkind <> 'i'
      AND
    nspname !~ '^pg_toast'
  ORDER BY
    pg_total_relation_size(C.oid) DESC;
  