BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	p_brand,
	p_type,
	p_size,
	count(distinct ps_suppkey) as supplier_cnt
from
	partsupp,
	part
where
	p_partkey = ps_partkey
	and p_brand <> 'Brand#15'
	and p_type not like 'LARGE POLISHED%'
	and p_size in (20, 30, 33, 44, 31, 42, 1, 23)
	and ps_suppkey not in (
		select
			s_suppkey
		from
			supplier
		where
			s_comment like '%Customer%Complaints%'
	)
group by
	p_brand,
	p_type,
	p_size
order by
	supplier_cnt desc,
	p_brand,
	p_type,
	p_size;
                                                                                QUERY PLAN                                                                                
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Sort  (cost=416711.99..416781.68 rows=27875 width=40) (actual time=12203.308..12208.500 rows=27839 loops=1)
   Sort Key: (count(DISTINCT partsupp.ps_suppkey)), part.p_brand, part.p_type, part.p_size
   Sort Method: quicksort  Memory: 2967kB
   Buffers: shared hit=11432 read=201007 written=310
   ->  GroupAggregate  (cost=406941.99..414653.89 rows=27875 width=40) (actual time=11093.627..12146.091 rows=27839 loops=1)
         Group Key: part.p_brand, part.p_type, part.p_size
         Buffers: shared hit=11418 read=201007 written=310
         ->  Sort  (cost=406941.99..408428.62 rows=594652 width=40) (actual time=11093.355..11468.395 rows=1187549 loops=1)
               Sort Key: part.p_brand, part.p_type, part.p_size
               Sort Method: quicksort  Memory: 141930kB
               Buffers: shared hit=11418 read=201007 written=310
               ->  Hash Join  (cost=58005.33..349909.85 rows=594652 width=40) (actual time=1109.588..7108.655 rows=1187549 loops=1)
                     Hash Cond: (partsupp.ps_partkey = part.p_partkey)
                     Buffers: shared hit=11418 read=201007 written=310
                     ->  Seq Scan on partsupp  (cost=16.23..270974.23 rows=4000000 width=8) (actual time=0.443..4251.235 rows=7995520 loops=1)
                           Filter: (NOT (hashed SubPlan 1))
                           Rows Removed by Filter: 4480
                           Buffers: shared hit=8671 read=162343 written=15
                           SubPlan 1
                             ->  Index Scan using supplier_s_suppkey_idx_like on supplier  (cost=0.14..15.98 rows=100 width=4) (actual time=0.049..0.397 rows=56 loops=1)
                                   Buffers: shared hit=55 read=1
                     ->  Hash  (cost=54272.52..54272.52 rows=297326 width=40) (actual time=1081.993..1081.993 rows=297053 loops=1)
                           Buckets: 524288  Batches: 1  Memory Usage: 25598kB
                           Buffers: shared hit=2747 read=38664 written=295
                           ->  Bitmap Heap Scan on part  (cost=5740.70..54272.52 rows=297326 width=40) (actual time=99.159..943.140 rows=297053 loops=1)
                                 Recheck Cond: (p_size = ANY ('{20,30,33,44,31,42,1,23}'::integer[]))
                                 Filter: ((p_brand <> 'Brand#15'::bpchar) AND ((p_type)::text !~~ 'LARGE POLISHED%'::text))
                                 Rows Removed by Filter: 22990
                                 Heap Blocks: exact=40512
                                 Buffers: shared hit=2747 read=38664 written=295
                                 ->  Bitmap Index Scan on part_p_size_idx  (cost=0.00..5666.37 rows=320393 width=0) (actual time=86.566..86.566 rows=320043 loops=1)
                                       Index Cond: (p_size = ANY ('{20,30,33,44,31,42,1,23}'::integer[]))
                                       Buffers: shared hit=9 read=890 written=17
 Planning time: 4.761 ms
 Execution time: 12239.678 ms
(35 rows)

COMMIT;
COMMIT