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 = 45 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=823114.74..823114.75 rows=1 width=190) (actual time=49107.959..49107.998 rows=100 loops=1) Buffers: shared hit=1713422 read=165580 written=3434 -> Sort (cost=823114.74..823114.75 rows=1 width=190) (actual time=49107.954..49107.976 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=1713422 read=165580 written=3434 -> Merge Join (cost=395548.32..823114.73 rows=1 width=190) (actual time=40520.887..49092.589 rows=4779 loops=1) Merge Cond: (part.p_partkey = public.partsupp.ps_partkey) Join Filter: (public.partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1696 Buffers: shared hit=1713414 read=165580 written=3434 -> Index Scan using pk_part on part (cost=0.00..102473.47 rows=7947 width=30) (actual time=0.055..4078.693 rows=8002 loops=1) Filter: (((p_type)::text ~~ '%TIN'::text) AND (p_size = 45)) Rows Removed by Filter: 1991998 Buffers: shared hit=757 read=45984 written=3132 -> Sort (cost=395548.32..399548.32 rows=1600000 width=168) (actual time=40520.169..41241.045 rows=1602366 loops=1) Sort Key: public.partsupp.ps_partkey Sort Method: quicksort Memory: 474854kB Buffers: shared hit=1553958 read=115468 written=13 -> Nested Loop (cost=1.56..230671.20 rows=1600000 width=168) (actual time=0.562..37746.216 rows=1602640 loops=1) Buffers: shared hit=1553958 read=115468 written=13 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.467..329.580 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..0.018 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=0.448..281.777 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=0.011..95.291 rows=100000 loops=1) Buffers: shared hit=2179 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.417..0.417 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=0.396..0.401 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=0.138..1.831 rows=80 loops=20033) Index Cond: (ps_suppkey = public.supplier.s_suppkey) Buffers: shared hit=1551777 read=115468 written=13 SubPlan 1 -> Aggregate (cost=49.85..49.86 rows=1 width=4) (actual time=0.438..0.438 rows=1 loops=6475) Buffers: shared hit=158699 read=4128 written=289 -> Nested Loop (cost=0.00..49.84 rows=1 width=4) (actual time=0.301..0.432 rows=2 loops=6475) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=158699 read=4128 written=289 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.030..0.031 rows=1 loops=6475) Filter: (r_name = 'EUROPE'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6475 -> Nested Loop (cost=0.00..48.73 rows=4 width=8) (actual time=0.195..0.397 rows=4 loops=6475) Buffers: shared hit=152224 read=4128 written=289 -> Nested Loop (cost=0.00..47.61 rows=4 width=8) (actual time=0.147..0.274 rows=4 loops=6475) Buffers: shared hit=100424 read=4128 written=289 -> Index Scan using pk_partsupp on partsupp (cost=0.00..14.45 rows=4 width=8) (actual time=0.091..0.095 rows=4 loops=6475) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=22604 read=4128 written=289 -> Index Scan using pk_supplier on supplier (cost=0.00..8.28 rows=1 width=8) (actual time=0.042..0.042 rows=1 loops=25900) Index Cond: (s_suppkey = public.partsupp.ps_suppkey) Buffers: shared hit=77820 -> Index Scan using pk_nation on nation (cost=0.00..0.27 rows=1 width=8) (actual time=0.029..0.029 rows=1 loops=25900) Index Cond: (n_nationkey = public.supplier.s_nationkey) Buffers: shared hit=51800 Total runtime: 49180.186 ms (67 rows) COMMIT; COMMIT