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 'drab%'
			and ps_availqty > (
				select
					0.5 * sum(l_quantity)
				from
					lineitem
				where
					l_partkey = ps_partkey
					and l_suppkey = ps_suppkey
					and l_shipdate >= '1993-01-01'
					and l_shipdate < cast(date '1993-01-01' + interval '1 year' as date)
			)
	)
	and s_nationkey = n_nationkey
	and n_name = 'KENYA'
order by
	s_name;
                                                                                                  QUERY PLAN                                                                                                   
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Sort  (cost=12740760.65..12740763.59 rows=1174 width=51) (actual time=17158.302..17158.419 rows=1783 loops=1)
   Sort Key: supplier.s_name
   Sort Method: quicksort  Memory: 257kB
   Buffers: shared hit=2728413 read=377923 dirtied=756 written=379
   ->  Nested Loop  (cost=12736291.35..12740700.79 rows=1174 width=51) (actual time=16945.880..17143.557 rows=1783 loops=1)
         Join Filter: (supplier.s_nationkey = nation.n_nationkey)
         Rows Removed by Join Filter: 42845
         Buffers: shared hit=2728408 read=377923 dirtied=756 written=379
         ->  Seq Scan on nation  (cost=0.00..1.31 rows=1 width=4) (actual time=0.013..0.032 rows=1 loops=1)
               Filter: (n_name = 'KENYA'::bpchar)
               Rows Removed by Filter: 24
               Buffers: shared hit=1
         ->  Hash Semi Join  (cost=12736291.35..12740332.56 rows=29354 width=55) (actual time=16945.839..17135.362 rows=44628 loops=1)
               Hash Cond: (supplier.s_suppkey = partsupp.ps_suppkey)
               Buffers: shared hit=2728407 read=377923 dirtied=756 written=379
               ->  Seq Scan on supplier  (cost=0.00..3179.00 rows=100000 width=59) (actual time=0.010..62.578 rows=100000 loops=1)
                     Buffers: shared hit=4 read=2175
               ->  Hash  (cost=12735924.43..12735924.43 rows=29354 width=4) (actual time=16945.778..16945.778 rows=44628 loops=1)
                     Buckets: 4096  Batches: 1  Memory Usage: 1569kB
                     Buffers: shared hit=2728403 read=375748 dirtied=756 written=379
                     ->  HashAggregate  (cost=12735337.35..12735630.89 rows=29354 width=4) (actual time=16903.356..16929.833 rows=44628 loops=1)
                           Buffers: shared hit=2728403 read=375748 dirtied=756 written=379
                           ->  Nested Loop  (cost=0.00..12735263.96 rows=29354 width=4) (actual time=1.089..16770.894 rows=59017 loops=1)
                                 Buffers: shared hit=2728403 read=375748 dirtied=756 written=379
                                 ->  Seq Scan on part  (cost=0.00..65522.00 rows=22022 width=4) (actual time=0.135..1361.274 rows=21685 loops=1)
                                       Filter: ((p_name)::text ~~ 'drab%'::text)
                                       Rows Removed by Filter: 1978315
                                       Buffers: shared hit=4222 read=36300 written=24
                                 ->  Index Scan using pk_partsupp on partsupp  (cost=0.00..575.31 rows=1 width=8) (actual time=0.550..0.707 rows=3 loops=21685)
                                       Index Cond: (ps_partkey = part.p_partkey)
                                       Filter: ((ps_availqty)::double precision > (SubPlan 1))
                                       Rows Removed by Filter: 1
                                       Buffers: shared hit=2724181 read=339448 dirtied=756 written=355
                                       SubPlan 1
                                         ->  Aggregate  (cost=140.92..140.94 rows=1 width=4) (actual time=0.163..0.163 rows=1 loops=86740)
                                               Buffers: shared hit=2664907 read=309113 dirtied=756 written=345
                                               ->  Index Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=0.00..140.92 rows=1 width=4) (actual time=0.102..0.160 rows=1 loops=86740)
                                                     Index Cond: (l_partkey = partsupp.ps_partkey)
                                                     Filter: ((l_shipdate >= '1993-01-01'::date) AND (l_shipdate < '1994-01-01'::date) AND (l_suppkey = partsupp.ps_suppkey))
                                                     Rows Removed by Filter: 29
                                                     Buffers: shared hit=2664907 read=309113 dirtied=756 written=345
 Total runtime: 17160.240 ms
(42 rows)

COMMIT;
COMMIT