SELECT schema,
pg_size_pretty(SUM(pg_relation_size( name::text ))::BIGINT) AS total,
pg_size_pretty(SUM(SIZE)::BIGINT * 8 * 1024) AS REAL,
pg_size_pretty(SUM(pg_relation_size( name::text ))::BIGINT - SUM(SIZE)::BIGINT * 8 * 1024) AS bloat FROM (
    SELECT  pgn.nspname AS schema,
        relname AS name,
        relpages AS SIZE,
        CASE WHEN relkind = 't'
                THEN (SELECT pgd.relname FROM pg_class pgd WHERE pgd.reltoastrelid = pg.oid)
            WHEN nspname = 'pg_toast' AND relkind = 'i'
                THEN (SELECT pgt.relname FROM pg_class pgt WHERE SUBSTRING(pgt.relname FROM 10) = REPLACE(SUBSTRING(pg.relname FROM 10), '_index', ''))
            ELSE (SELECT pgc.relname FROM pg_class pgc WHERE pg.reltoastrelid = pgc.oid) END::VARCHAR AS refrelname,
        CASE WHEN nspname = 'pg_toast' AND relkind = 'i'
                THEN (SELECT pgts.relname FROM pg_class pgts WHERE pgts.reltoastrelid = (SELECT pgt.oid FROM pg_class pgt WHERE SUBSTRING(pgt.relname FROM 10) = REPLACE(SUBSTRING(pg.relname FROM 10), '_index', '')))
            END AS relidxrefrelname, relfilenode, relkind, reltuples::BIGINT, relpages FROM pg_class pg, pg_namespace pgn
    WHERE pg.relnamespace = pgn.oid AND pgn.nspname NOT IN ('information_schema', 'pg_catalog')
    AND relname NOT IN ('primary_keys', 'tables') AND relname NOT LIKE ('pg_toast_%') AND relname NOT LIKE ('log_%_') AND relname NOT LIKE ('table_%') AND relname NOT LIKE ('index_%')  AND relname NOT LIKE ('pk_%')
    AND relname LIKE '%'
    ORDER BY relpages DESC) AS s GROUP BY schema;