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 = 15 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=824478.99..824479.00 rows=1 width=190) (actual time=23123.830..23123.864 rows=100 loops=1) Buffers: shared hit=1810425 read=64344 written=299 -> Sort (cost=824478.99..824479.00 rows=1 width=190) (actual time=23123.826..23123.845 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=1810425 read=64344 written=299 -> Merge Join (cost=395374.30..824478.98 rows=1 width=190) (actual time=18304.867..23111.394 rows=4677 loops=1) Merge Cond: (part.p_partkey = public.partsupp.ps_partkey) Join Filter: (public.partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1628 Buffers: shared hit=1810417 read=64344 written=299 -> Index Scan using pk_part on part (cost=0.00..102473.47 rows=8034 width=30) (actual time=2.872..2444.521 rows=7828 loops=1) Filter: (((p_type)::text ~~ '%NICKEL'::text) AND (p_size = 15)) Rows Removed by Filter: 1992172 Buffers: shared hit=2006 read=44735 written=259 -> Sort (cost=395374.30..399370.35 rows=1598418 width=168) (actual time=18301.320..18941.140 rows=1602118 loops=1) Sort Key: public.partsupp.ps_partkey Sort Method: quicksort Memory: 474854kB Buffers: shared hit=1653495 read=15931 written=9 -> Nested Loop (cost=1.56..230671.61 rows=1598418 width=168) (actual time=0.156..13880.620 rows=1602640 loops=1) Buffers: shared hit=1653495 read=15931 written=9 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.089..228.405 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=0.009..0.015 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=0.066..197.443 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=0.015..68.467 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=0.005..0.010 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=0.049..0.648 rows=80 loops=20033) Index Cond: (ps_suppkey = public.supplier.s_suppkey) Buffers: shared hit=1651314 read=15931 written=9 SubPlan 1 -> Aggregate (cost=49.85..49.86 rows=1 width=4) (actual time=0.138..0.138 rows=1 loops=6305) Buffers: shared hit=154916 read=3678 written=31 -> Nested Loop (cost=0.00..49.84 rows=1 width=4) (actual time=0.090..0.133 rows=2 loops=6305) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=154916 read=3678 written=31 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.005..0.006 rows=1 loops=6305) Filter: (r_name = 'EUROPE'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6305 -> Nested Loop (cost=0.00..48.73 rows=4 width=8) (actual time=0.059..0.124 rows=4 loops=6305) Buffers: shared hit=148611 read=3678 written=31 -> Nested Loop (cost=0.00..47.61 rows=4 width=8) (actual time=0.053..0.101 rows=4 loops=6305) Buffers: shared hit=98171 read=3678 written=31 -> Index Scan using pk_partsupp on partsupp (cost=0.00..14.45 rows=4 width=8) (actual time=0.034..0.037 rows=4 loops=6305) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=22371 read=3678 written=31 -> Index Scan using pk_supplier on supplier (cost=0.00..8.28 rows=1 width=8) (actual time=0.014..0.014 rows=1 loops=25220) Index Cond: (s_suppkey = public.partsupp.ps_suppkey) Buffers: shared hit=75800 -> Index Scan using pk_nation on nation (cost=0.00..0.27 rows=1 width=8) (actual time=0.004..0.005 rows=1 loops=25220) Index Cond: (n_nationkey = public.supplier.s_nationkey) Buffers: shared hit=50440 Total runtime: 23215.804 ms (67 rows) COMMIT; COMMIT