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 'deep%'
			and ps_availqty > (
				select
					0.5 * sum(l_quantity)
				from
					lineitem
				where
					l_partkey = ps_partkey
					and l_suppkey = ps_suppkey
					and l_shipdate >= '1996-01-01'
					and l_shipdate < cast(date '1996-01-01' + interval '1 year' as date)
			)
	)
	and s_nationkey = n_nationkey
	and n_name = 'ETHIOPIA'
order by
	s_name;
                                                                                                  QUERY PLAN                                                                                                   
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Sort  (cost=12740712.16..12740715.08 rows=1170 width=51) (actual time=16845.098..16845.214 rows=1708 loops=1)
   Sort Key: supplier.s_name
   Sort Method: quicksort  Memory: 247kB
   Buffers: shared hit=2695240 read=376187 dirtied=614
   ->  Nested Loop  (cost=12736245.92..12740652.53 rows=1170 width=51) (actual time=16657.458..16834.935 rows=1708 loops=1)
         Join Filter: (supplier.s_nationkey = nation.n_nationkey)
         Rows Removed by Join Filter: 42692
         Buffers: shared hit=2695235 read=376187 dirtied=614
         ->  Seq Scan on nation  (cost=0.00..1.31 rows=1 width=4) (actual time=0.013..0.020 rows=1 loops=1)
               Filter: (n_name = 'ETHIOPIA'::bpchar)
               Rows Removed by Filter: 24
               Buffers: shared hit=1
         ->  Hash Semi Join  (cost=12736245.92..12740285.46 rows=29261 width=55) (actual time=16657.310..16826.173 rows=44400 loops=1)
               Hash Cond: (supplier.s_suppkey = partsupp.ps_suppkey)
               Buffers: shared hit=2695234 read=376187 dirtied=614
               ->  Seq Scan on supplier  (cost=0.00..3179.00 rows=100000 width=59) (actual time=0.021..45.432 rows=100000 loops=1)
                     Buffers: shared hit=2179
               ->  Hash  (cost=12735880.15..12735880.15 rows=29261 width=4) (actual time=16657.227..16657.227 rows=44400 loops=1)
                     Buckets: 4096  Batches: 1  Memory Usage: 1561kB
                     Buffers: shared hit=2693055 read=376187 dirtied=614
                     ->  HashAggregate  (cost=12735294.93..12735587.54 rows=29261 width=4) (actual time=16615.758..16641.462 rows=44400 loops=1)
                           Buffers: shared hit=2693055 read=376187 dirtied=614
                           ->  Nested Loop  (cost=0.00..12735221.78 rows=29261 width=4) (actual time=1.174..16495.932 rows=58492 loops=1)
                                 Buffers: shared hit=2693055 read=376187 dirtied=614
                                 ->  Seq Scan on part  (cost=0.00..65522.00 rows=22022 width=4) (actual time=0.014..1353.748 rows=21473 loops=1)
                                       Filter: ((p_name)::text ~~ 'deep%'::text)
                                       Rows Removed by Filter: 1978527
                                       Buffers: shared hit=610 read=39912
                                 ->  Index Scan using pk_partsupp on partsupp  (cost=0.00..575.31 rows=1 width=8) (actual time=0.530..0.702 rows=3 loops=21473)
                                       Index Cond: (ps_partkey = part.p_partkey)
                                       Filter: ((ps_availqty)::double precision > (SubPlan 1))
                                       Rows Removed by Filter: 1
                                       Buffers: shared hit=2692445 read=336275 dirtied=614
                                       SubPlan 1
                                         ->  Aggregate  (cost=140.92..140.93 rows=1 width=4) (actual time=0.162..0.162 rows=1 loops=85892)
                                               Buffers: shared hit=2636814 read=303286 dirtied=614
                                               ->  Index Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=0.00..140.92 rows=1 width=4) (actual time=0.101..0.159 rows=1 loops=85892)
                                                     Index Cond: (l_partkey = partsupp.ps_partkey)
                                                     Filter: ((l_shipdate >= '1996-01-01'::date) AND (l_shipdate < '1997-01-01'::date) AND (l_suppkey = partsupp.ps_suppkey))
                                                     Rows Removed by Filter: 29
                                                     Buffers: shared hit=2636814 read=303286 dirtied=614
 Total runtime: 16846.982 ms
(42 rows)

COMMIT;
COMMIT