adv=> explain select * from adv where ad_id IN ( 1 ,  2 ,  3 );
                                                QUERY PLAN
----------------------------------------------------------------------------------------------------------
 Index Scan using adv_adv_id_pk, adv_adv_id_pk, adv_adv_id_pk on adv  (cost= 0 . 00 .. 18 . 00  rows= 3  width= 150 )
   Index Cond: ((ad_id =  1 ) OR (ad_id =  2 ) OR (ad_id =  3 ))
( 2  rows)

adv=> explain select * from adv where ad_id = ANY ('{1,2,3}');
                       QUERY PLAN
---------------------------------------------------------
 Seq Scan on adv  (cost= 0 . 00 .. 135 . 10  rows= 302  width= 150 )
   Filter: (ad_id = ANY ('{1,2,3}'::integer[]))
( 2  rows)