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 = 4 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=820970.20..820970.21 rows=1 width=190) (actual time=53462.068..53462.104 rows=100 loops=1) Buffers: shared hit=1628517 read=248719 -> Sort (cost=820970.20..820970.21 rows=1 width=190) (actual time=53462.064..53462.089 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=1628517 read=248719 -> Merge Join (cost=395548.32..820970.19 rows=1 width=190) (actual time=43473.461..53444.815 rows=4759 loops=1) Merge Cond: (part.p_partkey = public.partsupp.ps_partkey) Join Filter: (public.partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1645 Buffers: shared hit=1628509 read=248719 -> Index Scan using pk_part on part (cost=0.00..102473.47 rows=7894 width=30) (actual time=0.150..5147.193 rows=7946 loops=1) Filter: (((p_type)::text ~~ '%NICKEL'::text) AND (p_size = 4)) Rows Removed by Filter: 1992054 Buffers: shared hit=758 read=45983 -> Sort (cost=395548.32..399548.32 rows=1600000 width=168) (actual time=43472.069..44225.869 rows=1602386 loops=1) Sort Key: public.partsupp.ps_partkey Sort Method: quicksort Memory: 474854kB Buffers: shared hit=1470658 read=198768 -> Nested Loop (cost=1.56..230671.20 rows=1600000 width=168) (actual time=0.904..40187.730 rows=1602640 loops=1) Buffers: shared hit=1470658 read=198768 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.803..341.358 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..0.019 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=0.784..293.420 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=0.734..92.432 rows=100000 loops=1) Buffers: shared hit=2179 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.027..0.027 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=0.126..1.951 rows=80 loops=20033) Index Cond: (ps_suppkey = public.supplier.s_suppkey) Buffers: shared hit=1468477 read=198768 SubPlan 1 -> Aggregate (cost=49.85..49.86 rows=1 width=4) (actual time=0.490..0.490 rows=1 loops=6404) Buffers: shared hit=157093 read=3968 -> Nested Loop (cost=0.00..49.84 rows=1 width=4) (actual time=0.347..0.483 rows=2 loops=6404) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=157093 read=3968 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.034..0.036 rows=1 loops=6404) Filter: (r_name = 'EUROPE'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6404 -> Nested Loop (cost=0.00..48.73 rows=4 width=8) (actual time=0.228..0.443 rows=4 loops=6404) Buffers: shared hit=150689 read=3968 -> Nested Loop (cost=0.00..47.61 rows=4 width=8) (actual time=0.176..0.317 rows=4 loops=6404) Buffers: shared hit=99457 read=3968 -> Index Scan using pk_partsupp on partsupp (cost=0.00..14.45 rows=4 width=8) (actual time=0.113..0.119 rows=4 loops=6404) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=22474 read=3968 -> Index Scan using pk_supplier on supplier (cost=0.00..8.28 rows=1 width=8) (actual time=0.046..0.047 rows=1 loops=25616) Index Cond: (s_suppkey = public.partsupp.ps_suppkey) Buffers: shared hit=76983 -> Index Scan using pk_nation on nation (cost=0.00..0.27 rows=1 width=8) (actual time=0.029..0.030 rows=1 loops=25616) Index Cond: (n_nationkey = public.supplier.s_nationkey) Buffers: shared hit=51232 Total runtime: 53532.999 ms (67 rows) COMMIT; COMMIT