BEGIN; BEGIN EXPLAIN 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#32' and p_type not like 'ECONOMY BURNISHED%' and p_size in (12, 24, 15, 45, 20, 6, 8, 41) 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=456042.68..456112.29 rows=27845 width=40) Sort Key: (count(DISTINCT partsupp.ps_suppkey)), part.p_brand, part.p_type, part.p_size -> GroupAggregate (cost=446340.21..453987.01 rows=27845 width=40) -> Sort (cost=446340.21..447813.88 rows=589468 width=40) Sort Key: part.p_brand, part.p_type, part.p_size -> Hash Join (cost=57989.81..389842.49 rows=589468 width=40) Hash Cond: (partsupp.ps_partkey = part.p_partkey) -> Seq Scan on partsupp (cost=16.34..270974.34 rows=4000000 width=8) Filter: (NOT (hashed SubPlan 1)) SubPlan 1 -> Index Scan using supplier_s_suppkey_idx_like on supplier (cost=0.00..16.09 rows=100 width=4) -> Hash (cost=54260.84..54260.84 rows=297010 width=40) -> Bitmap Heap Scan on part (cost=5737.02..54260.84 rows=297010 width=40) Recheck Cond: (p_size = ANY ('{12,24,15,45,20,6,8,41}'::integer[])) Filter: ((p_brand <> 'Brand#32'::bpchar) AND ((p_type)::text !~~ 'ECONOMY BURNISHED%'::text)) -> Bitmap Index Scan on part_p_size_idx (cost=0.00..5662.77 rows=320073 width=0) Index Cond: (p_size = ANY ('{12,24,15,45,20,6,8,41}'::integer[])) (17 rows) COMMIT; COMMIT