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 = 49 and p_type like '%COPPER' 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=823863.47..823863.47 rows=1 width=190) (actual time=13919.858..13919.897 rows=100 loops=1) Buffers: shared hit=1851481 read=26269 written=59 -> Sort (cost=823863.47..823863.47 rows=1 width=190) (actual time=13919.856..13919.876 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=1851481 read=26269 written=59 -> Merge Join (cost=395548.99..823863.46 rows=1 width=190) (actual time=10073.507..13909.814 rows=4689 loops=1) Merge Cond: (part.p_partkey = public.partsupp.ps_partkey) Join Filter: (public.partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1700 Buffers: shared hit=1851473 read=26269 written=59 -> Index Scan using pk_part on part (cost=0.00..102473.47 rows=7969 width=30) (actual time=0.167..1610.428 rows=8044 loops=1) Filter: (((p_type)::text ~~ '%COPPER'::text) AND (p_size = 49)) Rows Removed by Filter: 1991956 Buffers: shared hit=46735 read=6 -> Sort (cost=395548.99..399548.99 rows=1600000 width=168) (actual time=10071.758..10702.029 rows=1603330 loops=1) Sort Key: public.partsupp.ps_partkey Sort Method: quicksort Memory: 475045kB Buffers: shared hit=1646773 read=23506 written=49 -> Nested Loop (cost=1.56..230671.86 rows=1600000 width=168) (actual time=0.071..6247.543 rows=1603360 loops=1) Buffers: shared hit=1646773 read=23506 written=49 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.059..182.607 rows=20042 loops=1) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 79958 Buffers: shared hit=2181 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.006..0.007 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=0.046..159.058 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=0.008..53.796 rows=100000 loops=1) Buffers: shared hit=2179 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.014..0.014 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=0.004..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=0.022..0.273 rows=80 loops=20042) Index Cond: (ps_suppkey = public.supplier.s_suppkey) Buffers: shared hit=1644592 read=23506 written=49 SubPlan 1 -> Aggregate (cost=49.85..49.86 rows=1 width=4) (actual time=0.115..0.115 rows=1 loops=6389) Buffers: shared hit=157965 read=2757 written=10 -> Nested Loop (cost=0.00..49.84 rows=1 width=4) (actual time=0.073..0.111 rows=2 loops=6389) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=157965 read=2757 written=10 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.005..0.006 rows=1 loops=6389) Filter: (r_name = 'MIDDLE EAST'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6389 -> Nested Loop (cost=0.00..48.73 rows=4 width=8) (actual time=0.047..0.103 rows=4 loops=6389) Buffers: shared hit=151576 read=2757 written=10 -> Nested Loop (cost=0.00..47.61 rows=4 width=8) (actual time=0.041..0.080 rows=4 loops=6389) Buffers: shared hit=100464 read=2757 written=10 -> Index Scan using pk_partsupp on partsupp (cost=0.00..14.45 rows=4 width=8) (actual time=0.025..0.027 rows=4 loops=6389) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=23649 read=2757 written=10 -> Index Scan using pk_supplier on supplier (cost=0.00..8.28 rows=1 width=8) (actual time=0.011..0.011 rows=1 loops=25556) Index Cond: (s_suppkey = public.partsupp.ps_suppkey) Buffers: shared hit=76815 -> 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=25556) Index Cond: (n_nationkey = public.supplier.s_nationkey) Buffers: shared hit=51112 Total runtime: 13986.246 ms (67 rows) COMMIT; COMMIT