BEGIN; BEGIN EXPLAIN (ANALYZE, BUFFERS) select s_acctbal, s_name, n_name, p_partkey, p_mfgr, s_address, s_phone, s_comment from part, supplier, partsupp, nation, region where p_partkey = ps_partkey and s_suppkey = ps_suppkey and p_size = 39 and p_type like '%TIN' and s_nationkey = n_nationkey and n_regionkey = r_regionkey and r_name = 'EUROPE' and ps_supplycost = ( select min(ps_supplycost) from partsupp, supplier, nation, region where p_partkey = ps_partkey and s_suppkey = ps_suppkey and s_nationkey = n_nationkey and n_regionkey = r_regionkey and r_name = 'EUROPE' ) order by s_acctbal desc, n_name, s_name, p_partkey LIMIT 100; QUERY PLAN ------------------------------------------------------------------------------------------------------------------------------------------------------------------------ Limit (cost=819972.51..819972.52 rows=1 width=190) (actual time=9216.475..9216.509 rows=100 loops=1) Buffers: shared hit=1722070 read=152670 written=28 -> Sort (cost=819972.51..819972.52 rows=1 width=190) (actual time=9216.471..9216.492 rows=100 loops=1) Sort Key: public.supplier.s_acctbal, public.nation.n_name, public.supplier.s_name, part.p_partkey Sort Method: top-N heapsort Memory: 51kB Buffers: shared hit=1722070 read=152670 written=28 -> Merge Join (cost=395548.02..819972.50 rows=1 width=190) (actual time=6227.851..9209.745 rows=4663 loops=1) Merge Cond: (part.p_partkey = public.partsupp.ps_partkey) Join Filter: (public.partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1643 Buffers: shared hit=1722062 read=152670 written=28 -> Index Scan using pk_part on part (cost=0.00..102473.47 rows=7913 width=30) (actual time=0.300..1304.911 rows=7972 loops=1) Filter: (((p_type)::text ~~ '%TIN'::text) AND (p_size = 39)) Rows Removed by Filter: 1992028 Buffers: shared hit=758 read=45983 written=26 -> Sort (cost=395548.01..399548.01 rows=1600000 width=168) (actual time=6227.027..6704.910 rows=1602608 loops=1) Sort Key: public.partsupp.ps_partkey Sort Method: quicksort Memory: 474854kB Buffers: shared hit=1566989 read=102437 -> Nested Loop (cost=1.56..230670.89 rows=1600000 width=168) (actual time=0.084..4867.628 rows=1602640 loops=1) Buffers: shared hit=1566989 read=102437 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.049..128.858 rows=20033 loops=1) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 79967 Buffers: shared hit=2181 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.005..0.015 rows=1 loops=1) Filter: (r_name = 'EUROPE'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=1 -> Hash Join (cost=1.56..4555.56 rows=100000 width=168) (actual time=0.037..111.611 rows=100000 loops=1) Hash Cond: (public.supplier.s_nationkey = public.nation.n_nationkey) Buffers: shared hit=2180 -> Seq Scan on supplier (cost=0.00..3179.00 rows=100000 width=142) (actual time=0.008..42.434 rows=100000 loops=1) Buffers: shared hit=2179 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.016..0.016 rows=25 loops=1) Buckets: 1024 Batches: 1 Memory Usage: 2kB Buffers: shared hit=1 -> Seq Scan on nation (cost=0.00..1.25 rows=25 width=34) (actual time=0.004..0.007 rows=25 loops=1) Buffers: shared hit=1 -> Index Scan using partsupp_ps_suppkey_idx on partsupp (cost=0.00..10.44 rows=80 width=12) (actual time=0.017..0.215 rows=80 loops=20033) Index Cond: (ps_suppkey = public.supplier.s_suppkey) Buffers: shared hit=1564808 read=102437 SubPlan 1 -> Aggregate (cost=49.85..49.86 rows=1 width=4) (actual time=0.065..0.065 rows=1 loops=6306) Buffers: shared hit=154315 read=4250 written=2 -> Nested Loop (cost=0.00..49.84 rows=1 width=4) (actual time=0.042..0.062 rows=2 loops=6306) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=154315 read=4250 written=2 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.002..0.003 rows=1 loops=6306) Filter: (r_name = 'EUROPE'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6306 -> Nested Loop (cost=0.00..48.73 rows=4 width=8) (actual time=0.027..0.058 rows=4 loops=6306) Buffers: shared hit=148009 read=4250 written=2 -> Nested Loop (cost=0.00..47.61 rows=4 width=8) (actual time=0.025..0.048 rows=4 loops=6306) Buffers: shared hit=97561 read=4250 written=2 -> Index Scan using pk_partsupp on partsupp (cost=0.00..14.45 rows=4 width=8) (actual time=0.016..0.018 rows=4 loops=6306) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=21744 read=4250 written=2 -> Index Scan using pk_supplier on supplier (cost=0.00..8.28 rows=1 width=8) (actual time=0.006..0.007 rows=1 loops=25224) Index Cond: (s_suppkey = public.partsupp.ps_suppkey) Buffers: shared hit=75817 -> Index Scan using pk_nation on nation (cost=0.00..0.27 rows=1 width=8) (actual time=0.001..0.002 rows=1 loops=25224) Index Cond: (n_nationkey = public.supplier.s_nationkey) Buffers: shared hit=50448 Total runtime: 9242.630 ms (67 rows) COMMIT; COMMIT