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 = 22 and p_type like '%NICKEL' 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=824910.80..824910.81 rows=1 width=190) (actual time=7773.725..7773.763 rows=100 loops=1) Buffers: shared hit=1677939 read=198792 -> Sort (cost=824910.80..824910.81 rows=1 width=190) (actual time=7773.718..7773.747 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: 52kB Buffers: shared hit=1677939 read=198792 -> Merge Join (cost=395548.99..824910.79 rows=1 width=190) (actual time=5067.204..7768.615 rows=4690 loops=1) Merge Cond: (part.p_partkey = public.partsupp.ps_partkey) Join Filter: (public.partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1694 Buffers: shared hit=1677931 read=198792 -> Index Scan using pk_part on part (cost=0.00..102473.47 rows=7995 width=30) (actual time=0.270..976.482 rows=8084 loops=1) Filter: (((p_type)::text ~~ '%NICKEL'::text) AND (p_size = 22)) Rows Removed by Filter: 1991916 Buffers: shared hit=41278 read=5463 -> Sort (cost=395548.99..399548.99 rows=1600000 width=168) (actual time=5066.271..5617.229 rows=1602529 loops=1) Sort Key: public.partsupp.ps_partkey Sort Method: quicksort Memory: 474854kB Buffers: shared hit=1480735 read=188691 -> Nested Loop (cost=1.56..230671.86 rows=1600000 width=168) (actual time=0.138..3736.087 rows=1602640 loops=1) Buffers: shared hit=1480735 read=188691 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.091..103.620 rows=20033 loops=1) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 79967 Buffers: shared hit=4 read=2177 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.010..0.023 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=0.065..89.697 rows=100000 loops=1) Hash Cond: (public.supplier.s_nationkey = public.nation.n_nationkey) Buffers: shared hit=3 read=2177 -> Seq Scan on supplier (cost=0.00..3179.00 rows=100000 width=142) (actual time=0.003..42.755 rows=100000 loops=1) Buffers: shared hit=2 read=2177 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.036..0.036 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..0.012 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=0.014..0.165 rows=80 loops=20033) Index Cond: (ps_suppkey = public.supplier.s_suppkey) Buffers: shared hit=1480731 read=186514 SubPlan 1 -> Aggregate (cost=49.85..49.86 rows=1 width=4) (actual time=0.048..0.049 rows=1 loops=6384) Buffers: shared hit=155918 read=4638 -> Nested Loop (cost=0.00..49.84 rows=1 width=4) (actual time=0.033..0.047 rows=2 loops=6384) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=155918 read=4638 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.001..0.002 rows=1 loops=6384) Filter: (r_name = 'EUROPE'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6384 -> Nested Loop (cost=0.00..48.73 rows=4 width=8) (actual time=0.024..0.044 rows=4 loops=6384) Buffers: shared hit=149534 read=4638 -> Nested Loop (cost=0.00..47.61 rows=4 width=8) (actual time=0.023..0.037 rows=4 loops=6384) Buffers: shared hit=98462 read=4638 -> Index Scan using pk_partsupp on partsupp (cost=0.00..14.45 rows=4 width=8) (actual time=0.017..0.018 rows=4 loops=6384) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=21976 read=4366 -> Index Scan using pk_supplier on supplier (cost=0.00..8.28 rows=1 width=8) (actual time=0.004..0.004 rows=1 loops=25536) Index Cond: (s_suppkey = public.partsupp.ps_suppkey) Buffers: shared hit=76486 read=272 -> Index Scan using pk_nation on nation (cost=0.00..0.27 rows=1 width=8) (actual time=0.001..0.001 rows=1 loops=25536) Index Cond: (n_nationkey = public.supplier.s_nationkey) Buffers: shared hit=51072 Total runtime: 7859.927 ms (67 rows) COMMIT; COMMIT