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 '%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=824711.31..824711.32 rows=1 width=190) (actual time=14475.559..14475.599 rows=100 loops=1) Buffers: shared hit=1703730 read=173480 written=196 -> Sort (cost=824711.31..824711.32 rows=1 width=190) (actual time=14475.557..14475.589 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=1703730 read=173480 written=196 -> Merge Join (cost=395548.99..824711.30 rows=1 width=190) (actual time=10102.696..14465.393 rows=4726 loops=1) Merge Cond: (part.p_partkey = public.partsupp.ps_partkey) Join Filter: (public.partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1677 Buffers: shared hit=1703722 read=173480 written=196 -> Index Scan using pk_part on part (cost=0.00..102473.47 rows=7990 width=30) (actual time=0.479..2042.669 rows=7926 loops=1) Filter: (((p_type)::text ~~ '%STEEL'::text) AND (p_size = 39)) Rows Removed by Filter: 1992074 Buffers: shared hit=12531 read=34210 written=57 -> Sort (cost=395548.99..399548.99 rows=1600000 width=168) (actual time=10100.591..10764.770 rows=1602316 loops=1) Sort Key: public.partsupp.ps_partkey Sort Method: quicksort Memory: 474854kB Buffers: shared hit=1533612 read=135814 written=134 -> Nested Loop (cost=1.56..230671.86 rows=1600000 width=168) (actual time=0.090..7239.119 rows=1602640 loops=1) Buffers: shared hit=1533612 read=135814 written=134 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.056..179.781 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=0.007..0.019 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=0.041..156.836 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=0.007..53.493 rows=100000 loops=1) Buffers: shared hit=2179 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.014..0.014 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=0.003..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=0.025..0.324 rows=80 loops=20033) Index Cond: (ps_suppkey = public.supplier.s_suppkey) Buffers: shared hit=1531431 read=135814 written=134 SubPlan 1 -> Aggregate (cost=49.85..49.86 rows=1 width=4) (actual time=0.120..0.120 rows=1 loops=6403) Buffers: shared hit=157579 read=3456 written=5 -> Nested Loop (cost=0.00..49.84 rows=1 width=4) (actual time=0.077..0.116 rows=2 loops=6403) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=157579 read=3456 written=5 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.005..0.006 rows=1 loops=6403) Filter: (r_name = 'EUROPE'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6403 -> Nested Loop (cost=0.00..48.73 rows=4 width=8) (actual time=0.051..0.107 rows=4 loops=6403) Buffers: shared hit=151176 read=3456 written=5 -> Nested Loop (cost=0.00..47.61 rows=4 width=8) (actual time=0.044..0.085 rows=4 loops=6403) Buffers: shared hit=99952 read=3456 written=5 -> Index Scan using pk_partsupp on partsupp (cost=0.00..14.45 rows=4 width=8) (actual time=0.030..0.032 rows=4 loops=6403) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=22978 read=3456 written=5 -> Index Scan using pk_supplier on supplier (cost=0.00..8.28 rows=1 width=8) (actual time=0.011..0.011 rows=1 loops=25612) Index Cond: (s_suppkey = public.partsupp.ps_suppkey) Buffers: shared hit=76974 -> Index Scan using pk_nation on nation (cost=0.00..0.27 rows=1 width=8) (actual time=0.004..0.004 rows=1 loops=25612) Index Cond: (n_nationkey = public.supplier.s_nationkey) Buffers: shared hit=51224 Total runtime: 14567.207 ms (67 rows) COMMIT; COMMIT