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 = 'WRAP DRUM'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                               QUERY PLAN                                                                                               
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=365767.19..365767.20 rows=1 width=4) (actual time=911.607..911.607 rows=1 loops=1)
   Buffers: shared hit=54964 read=28729 dirtied=278 written=38
   ->  Nested Loop  (cost=134.21..365717.31 rows=19951 width=4) (actual time=1.126..910.732 rows=5266 loops=1)
         Buffers: shared hit=54964 read=28729 dirtied=278 written=38
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.43..7780.60 rows=1970 width=4) (actual time=0.176..35.052 rows=1994 loops=1)
               Index Cond: ((p_container = 'WRAP DRUM'::bpchar) AND (p_brand = 'Brand#51'::bpchar))
               Heap Fetches: 1994
               Buffers: shared hit=394 read=1577 written=1
         ->  Index Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=133.78..181.58 rows=11 width=12) (actual time=0.006..0.007 rows=3 loops=1994)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13283
               SubPlan 1
                 ->  Aggregate  (cost=133.21..133.22 rows=1 width=4) (actual time=0.428..0.428 rows=1 loops=1994)
                       Buffers: shared hit=41287 read=27152 dirtied=278 written=37
                       ->  Index Only Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem lineitem_1  (cost=0.56..133.12 rows=32 width=4) (actual time=0.044..0.420 rows=30 loops=1994)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 60148
                             Buffers: shared hit=41287 read=27152 dirtied=278 written=37
               SubPlan 1
                 ->  Aggregate  (cost=133.21..133.22 rows=1 width=4) (actual time=0.428..0.428 rows=1 loops=1994)
                       Buffers: shared hit=41287 read=27152 dirtied=278 written=37
                       ->  Index Only Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem lineitem_1  (cost=0.56..133.12 rows=32 width=4) (actual time=0.044..0.420 rows=30 loops=1994)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 60148
                             Buffers: shared hit=41287 read=27152 dirtied=278 written=37
 Planning time: 3.740 ms
 Execution time: 911.808 ms
(27 rows)

COMMIT;
COMMIT