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#51'
	and p_container = 'LG PKG'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                               QUERY PLAN                                                                                               
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=350755.83..350755.84 rows=1 width=4) (actual time=783.008..783.008 rows=1 loops=1)
   Buffers: shared hit=50456 read=32695 dirtied=47 written=1221
   ->  Nested Loop  (cost=130.19..350706.32 rows=19804 width=4) (actual time=0.576..782.063 rows=5425 loops=1)
         Buffers: shared hit=50456 read=32695 dirtied=47 written=1221
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.43..7796.67 rows=1974 width=4) (actual time=0.128..13.853 rows=1973 loops=1)
               Index Cond: ((p_container = 'LG PKG'::bpchar) AND (p_brand = 'Brand#51'::bpchar))
               Heap Fetches: 1973
               Buffers: shared hit=1931 read=14 written=1
         ->  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=1973)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13376
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.379..0.379 rows=1 loops=1973)
                       Buffers: shared hit=35149 read=32681 dirtied=47 written=1220
                       ->  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=0.037..0.370 rows=30 loops=1973)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 59635
                             Buffers: shared hit=35149 read=32681 dirtied=47 written=1220
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.379..0.379 rows=1 loops=1973)
                       Buffers: shared hit=35149 read=32681 dirtied=47 written=1220
                       ->  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=0.037..0.370 rows=30 loops=1973)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 59635
                             Buffers: shared hit=35149 read=32681 dirtied=47 written=1220
 Planning time: 2.789 ms
 Execution time: 783.176 ms
(27 rows)

COMMIT;
COMMIT