Missing indexes

indexes.sql

SELECT  relname,
        seq_scan - idx_scan AS too_much_seq,
        CASE
            WHEN seq_scan - idx_scan > 0
                THEN 'Missing Index?'
            ELSE 'OK'
        END AS result,
        pg_relation_size(relid::regclass) AS rel_size,
        seq_scan,
        idx_scan
FROM    pg_stat_all_tables
WHERE   schemaname = 'public' AND
        pg_relation_size(relid::regclass) > 80000
ORDER BY too_much_seq DESC;