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 = 30 and p_type like '%STEEL' and s_nationkey = n_nationkey and n_regionkey = r_regionkey and r_name = 'MIDDLE EAST' 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 = 'MIDDLE EAST' ) order by s_acctbal desc, n_name, s_name, p_partkey LIMIT 100; QUERY PLAN ------------------------------------------------------------------------------------------------------------------------------------------------------------------------ Limit (cost=825708.14..825708.15 rows=1 width=190) (actual time=54572.088..54572.124 rows=100 loops=1) Buffers: shared hit=1680593 read=196760 written=6108 -> Sort (cost=825708.14..825708.15 rows=1 width=190) (actual time=54572.084..54572.104 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=1680593 read=196760 written=6108 -> Merge Join (cost=395548.32..825708.13 rows=1 width=190) (actual time=43424.570..54555.729 rows=4712 loops=1) Merge Cond: (part.p_partkey = public.partsupp.ps_partkey) Join Filter: (public.partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1660 Buffers: shared hit=1680585 read=196760 written=6108 -> Index Scan using pk_part on part (cost=0.00..102473.47 rows=8012 width=30) (actual time=0.134..5308.128 rows=7999 loops=1) Filter: (((p_type)::text ~~ '%STEEL'::text) AND (p_size = 30)) Rows Removed by Filter: 1992001 Buffers: shared hit=760 read=45981 written=5102 -> Sort (cost=395548.32..399548.32 rows=1600000 width=168) (actual time=43424.051..44193.336 rows=1602751 loops=1) Sort Key: public.partsupp.ps_partkey Sort Method: quicksort Memory: 475045kB Buffers: shared hit=1524409 read=145870 written=486 -> Nested Loop (cost=1.56..230671.20 rows=1600000 width=168) (actual time=0.076..40064.453 rows=1603360 loops=1) Buffers: shared hit=1524409 read=145870 written=486 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.059..358.681 rows=20042 loops=1) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 79958 Buffers: shared hit=1780 read=401 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.008..0.009 rows=1 loops=1) Filter: (r_name = 'MIDDLE EAST'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=1 -> Hash Join (cost=1.56..4555.56 rows=100000 width=168) (actual time=0.044..310.636 rows=100000 loops=1) Hash Cond: (public.supplier.s_nationkey = public.nation.n_nationkey) Buffers: shared hit=1779 read=401 -> Seq Scan on supplier (cost=0.00..3179.00 rows=100000 width=142) (actual time=0.011..117.531 rows=100000 loops=1) Buffers: shared hit=1778 read=401 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.017..0.017 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=0.149..1.944 rows=80 loops=20042) Index Cond: (ps_suppkey = public.supplier.s_suppkey) Buffers: shared hit=1522629 read=145469 written=486 SubPlan 1 -> Aggregate (cost=49.85..49.86 rows=1 width=4) (actual time=0.638..0.638 rows=1 loops=6372) Buffers: shared hit=155416 read=4909 written=520 -> Nested Loop (cost=0.00..49.84 rows=1 width=4) (actual time=0.447..0.631 rows=2 loops=6372) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=155416 read=4909 written=520 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.047..0.048 rows=1 loops=6372) Filter: (r_name = 'MIDDLE EAST'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6372 -> Nested Loop (cost=0.00..48.73 rows=4 width=8) (actual time=0.290..0.579 rows=4 loops=6372) Buffers: shared hit=149044 read=4909 written=520 -> Nested Loop (cost=0.00..47.61 rows=4 width=8) (actual time=0.210..0.404 rows=4 loops=6372) Buffers: shared hit=98068 read=4909 written=520 -> Index Scan using pk_partsupp on partsupp (cost=0.00..14.45 rows=4 width=8) (actual time=0.122..0.129 rows=4 loops=6372) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=21957 read=4398 written=440 -> Index Scan using pk_supplier on supplier (cost=0.00..8.28 rows=1 width=8) (actual time=0.066..0.066 rows=1 loops=25488) Index Cond: (s_suppkey = public.partsupp.ps_suppkey) Buffers: shared hit=76111 read=511 written=80 -> Index Scan using pk_nation on nation (cost=0.00..0.27 rows=1 width=8) (actual time=0.041..0.042 rows=1 loops=25488) Index Cond: (n_nationkey = public.supplier.s_nationkey) Buffers: shared hit=50976 Total runtime: 54684.395 ms (67 rows) COMMIT; COMMIT