BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	s_name,
	s_address
from
	supplier,
	nation
where
	s_suppkey in (
		select
			distinct (ps_suppkey)
		from
			partsupp,
			part
		where
			ps_partkey=p_partkey
			and p_name like 'almond%'
			and ps_availqty > (
				select
					0.5 * sum(l_quantity)
				from
					lineitem
				where
					l_partkey = ps_partkey
					and l_suppkey = ps_suppkey
					and l_shipdate >= '1997-01-01'
					and l_shipdate < cast(date '1997-01-01' + interval '1 year' as date)
			)
	)
	and s_nationkey = n_nationkey
	and n_name = 'ETHIOPIA'
order by
	s_name;
                                                                                               QUERY PLAN                                                                                                
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Sort  (cost=11913182.05..11913184.71 rows=1062 width=51) (actual time=11482.870..11482.987 rows=1782 loops=1)
   Sort Key: supplier.s_name
   Sort Method: quicksort  Memory: 256kB
   Buffers: shared hit=2709881 read=397056 dirtied=6190 written=29924
   ->  Hash Semi Join  (cost=11910785.57..11913128.67 rows=1062 width=51) (actual time=11450.919..11467.051 rows=1782 loops=1)
         Hash Cond: (supplier.s_suppkey = partsupp.ps_suppkey)
         Buffers: shared hit=2709876 read=397056 dirtied=6190 written=29924
         ->  Nested Loop  (cost=79.26..2391.58 rows=4000 width=55) (actual time=1.410..13.329 rows=3945 loops=1)
               Buffers: shared hit=1843 read=14
               ->  Seq Scan on nation  (cost=0.00..1.31 rows=1 width=4) (actual time=0.011..0.021 rows=1 loops=1)
                     Filter: (n_name = 'ETHIOPIA'::bpchar)
                     Rows Removed by Filter: 24
                     Buffers: shared hit=1
               ->  Bitmap Heap Scan on supplier  (cost=79.26..2350.26 rows=4000 width=59) (actual time=1.394..12.446 rows=3945 loops=1)
                     Recheck Cond: (s_nationkey = nation.n_nationkey)
                     Buffers: shared hit=1842 read=14
                     ->  Bitmap Index Scan on supplier_s_nationkey_s_suppkey_idx  (cost=0.00..78.26 rows=4000 width=0) (actual time=1.061..1.061 rows=3945 loops=1)
                           Index Cond: (s_nationkey = nation.n_nationkey)
                           Buffers: shared read=14
         ->  Hash  (cost=11910374.32..11910374.32 rows=26559 width=4) (actual time=11449.451..11449.451 rows=44511 loops=1)
               Buckets: 4096  Batches: 1  Memory Usage: 1565kB
               Buffers: shared hit=2708033 read=397042 dirtied=6190 written=29924
               ->  HashAggregate  (cost=11909843.14..11910108.73 rows=26559 width=4) (actual time=11420.118..11438.283 rows=44511 loops=1)
                     Buffers: shared hit=2708033 read=397042 dirtied=6190 written=29924
                     ->  Nested Loop  (cost=0.00..11909776.75 rows=26559 width=4) (actual time=1.042..11323.841 rows=58713 loops=1)
                           Buffers: shared hit=2708033 read=397042 dirtied=6190 written=29924
                           ->  Seq Scan on part  (cost=0.00..65522.00 rows=20020 width=4) (actual time=0.082..980.010 rows=21670 loops=1)
                                 Filter: ((p_name)::text ~~ 'almond%'::text)
                                 Rows Removed by Filter: 1978330
                                 Buffers: shared hit=2 read=40520 written=2848
                           ->  Index Scan using pk_partsupp on partsupp  (cost=0.00..591.61 rows=1 width=8) (actual time=0.393..0.475 rows=3 loops=21670)
                                 Index Cond: (ps_partkey = part.p_partkey)
                                 Filter: ((ps_availqty)::double precision > (SubPlan 1))
                                 Rows Removed by Filter: 1
                                 Buffers: shared hit=2708031 read=356522 dirtied=6190 written=27076
                                 SubPlan 1
                                   ->  Aggregate  (cost=144.95..144.96 rows=1 width=4) (actual time=0.110..0.110 rows=1 loops=86680)
                                         Buffers: shared hit=2645812 read=329198 dirtied=6190 written=24510
                                         ->  Index Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=0.00..144.94 rows=1 width=4) (actual time=0.068..0.108 rows=1 loops=86680)
                                               Index Cond: (l_partkey = partsupp.ps_partkey)
                                               Filter: ((l_shipdate >= '1997-01-01'::date) AND (l_shipdate < '1998-01-01'::date) AND (l_suppkey = partsupp.ps_suppkey))
                                               Rows Removed by Filter: 29
                                               Buffers: shared hit=2645812 read=329198 dirtied=6190 written=24510
 Total runtime: 11484.826 ms
(44 rows)

COMMIT;
COMMIT