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 = 36 and p_type like '%STEEL' 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=821441.52..821441.53 rows=1 width=190) (actual time=19639.324..19639.363 rows=100 loops=1) Buffers: shared hit=1656815 read=220529 written=98 -> Sort (cost=821441.52..821441.53 rows=1 width=190) (actual time=19639.320..19639.345 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=1656815 read=220529 written=98 -> Merge Join (cost=395522.09..821441.51 rows=1 width=190) (actual time=14224.028..19627.340 rows=4735 loops=1) Merge Cond: (part.p_partkey = public.partsupp.ps_partkey) Join Filter: (public.partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1673 Buffers: shared hit=1656807 read=220529 written=98 -> Index Scan using pk_part on part (cost=0.00..102473.47 rows=7908 width=30) (actual time=0.169..2744.011 rows=8018 loops=1) Filter: (((p_type)::text ~~ '%STEEL'::text) AND (p_size = 36)) Rows Removed by Filter: 1991982 Buffers: shared hit=6752 read=39989 written=2 -> Sort (cost=395522.09..399521.49 rows=1599760 width=168) (actual time=14223.545..14770.884 rows=1601867 loops=1) Sort Key: public.partsupp.ps_partkey Sort Method: quicksort Memory: 474854kB Buffers: shared hit=1492394 read=177032 written=94 -> Nested Loop (cost=1.56..230671.43 rows=1599760 width=168) (actual time=0.158..12050.797 rows=1602640 loops=1) Buffers: shared hit=1492394 read=177032 written=94 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.087..226.024 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=0.008..0.020 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=0.067..198.039 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=0.012..67.676 rows=100000 loops=1) Buffers: shared hit=2179 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.026..0.026 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=0.006..0.013 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=0.034..0.552 rows=80 loops=20033) Index Cond: (ps_suppkey = public.supplier.s_suppkey) Buffers: shared hit=1490213 read=177032 written=94 SubPlan 1 -> Aggregate (cost=49.85..49.86 rows=1 width=4) (actual time=0.183..0.183 rows=1 loops=6408) Buffers: shared hit=157661 read=3508 written=2 -> Nested Loop (cost=0.00..49.84 rows=1 width=4) (actual time=0.119..0.179 rows=2 loops=6408) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=157661 read=3508 written=2 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.005..0.006 rows=1 loops=6408) Filter: (r_name = 'EUROPE'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6408 -> Nested Loop (cost=0.00..48.73 rows=4 width=8) (actual time=0.082..0.170 rows=4 loops=6408) Buffers: shared hit=151253 read=3508 written=2 -> Nested Loop (cost=0.00..47.61 rows=4 width=8) (actual time=0.068..0.129 rows=4 loops=6408) Buffers: shared hit=99989 read=3508 written=2 -> Index Scan using pk_partsupp on partsupp (cost=0.00..14.45 rows=4 width=8) (actual time=0.044..0.047 rows=4 loops=6408) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=22933 read=3508 written=2 -> Index Scan using pk_supplier on supplier (cost=0.00..8.28 rows=1 width=8) (actual time=0.018..0.018 rows=1 loops=25632) Index Cond: (s_suppkey = public.partsupp.ps_suppkey) Buffers: shared hit=77056 -> Index Scan using pk_nation on nation (cost=0.00..0.27 rows=1 width=8) (actual time=0.008..0.009 rows=1 loops=25632) Index Cond: (n_nationkey = public.supplier.s_nationkey) Buffers: shared hit=51264 Total runtime: 19679.988 ms (67 rows) COMMIT; COMMIT