+=# set plantuner.enable_index='id_idx';
+=# explain select id from test where id=1;
+ QUERY PLAN
+-----------------------------------------------------------------------
+ Bitmap Heap Scan on test (cost=4.34..15.03 rows=12 width=4)
+ Recheck Cond: (id = 1)
+ -> Bitmap Index Scan on id_idx (cost=0.00..4.34 rows=12 width=0)
+ Index Cond: (id = 1)
+(4 rows)
+