select relname, indexrelname, idx_scan+idx_tup_read+idx_tup_fetch as somme from pg_stat_user_indexes i where schemaname='public' and (relname,idx_scan+idx_tup_read+idx_tup_fetch)=(select relname, max(idx_scan+idx_tup_read+idx_tup_fetch) from pg_stat_user_indexes j where i.relname=j.relname group by relname limit 1) ;

fli_newsletter_config             | pk_fli_newsletter_config             |             0
fli_newsletter_config             | newsletter_config_id                 |             0

Je ne veux que la première ligne.