BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	sum(l_extendedprice) / 7.0 as avg_yearly
from
	lineitem,
	part
where
	p_partkey = l_partkey
	and p_brand = 'Brand#53'
	and p_container = 'LG DRUM'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                               QUERY PLAN                                                                                               
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=353237.73..353237.74 rows=1 width=4) (actual time=756.542..756.542 rows=1 loops=1)
   Buffers: shared hit=60163 read=26745 dirtied=50 written=20
   ->  Nested Loop  (cost=130.19..353187.84 rows=19955 width=4) (actual time=0.788..755.491 rows=5611 loops=1)
         Buffers: shared hit=60163 read=26745 dirtied=50 written=20
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.43..7852.93 rows=1988 width=4) (actual time=0.129..33.301 rows=2059 loops=1)
               Index Cond: ((p_container = 'LG DRUM'::bpchar) AND (p_brand = 'Brand#53'::bpchar))
               Heap Fetches: 2059
               Buffers: shared hit=201 read=1826 written=3
         ->  Index Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=129.76..173.61 rows=10 width=12) (actual time=0.006..0.007 rows=3 loops=2059)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13899
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.340..0.340 rows=1 loops=2059)
                       Buffers: shared hit=46063 read=24919 dirtied=50 written=17
                       ->  Index Only Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem lineitem_1  (cost=0.56..129.11 rows=31 width=4) (actual time=0.035..0.331 rows=30 loops=2059)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 62413
                             Buffers: shared hit=46063 read=24919 dirtied=50 written=17
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.340..0.340 rows=1 loops=2059)
                       Buffers: shared hit=46063 read=24919 dirtied=50 written=17
                       ->  Index Only Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem lineitem_1  (cost=0.56..129.11 rows=31 width=4) (actual time=0.035..0.331 rows=30 loops=2059)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 62413
                             Buffers: shared hit=46063 read=24919 dirtied=50 written=17
 Planning time: 3.220 ms
 Execution time: 756.718 ms
(27 rows)

COMMIT;
COMMIT