PostgreSQL: Log statements which do sequential scans

I use this snippet to detect missing indexes:

https://stackoverflow.com/a/12818168/633961

Example:

SELECT   relname                                               AS TableName,   to_char(seq_scan, '999,999,999,999')                  AS TotalSeqScan,   to_char(idx_scan, '999,999,999,999')                  AS TotalIndexScan,   to_char(n_live_tup, '999,999,999,999')                AS TableRows,   pg_size_pretty(pg_relation_size(relname :: regclass)) AS TableSize FROM pg_stat_all_tables WHERE schemaname = 'public'       AND 50 * seq_scan > idx_scan -- more then 2%       AND n_live_tup > 10000       AND pg_relation_size(relname :: regclass) > 5000000 ORDER BY relname ASC;

Result:

tablename | totalseqscan | totalindexscan | tablerows | tablesize----------+--------------+----------------+-----------+---------- mytable  |      112,479 |      2,978,344 | 1,293,536 |   1716 MB

I am curious - I would like to see which SQL statements actually does a seq scan on table mytable.

Is there a way to let PostgreSQL emit a warning if it does a sequential scan on this table?