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 = 47 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=829549.00..829549.00 rows=1 width=190) (actual time=16060.110..16060.144 rows=100 loops=1) Buffers: shared hit=1685136 read=193969 -> Sort (cost=829549.00..829549.00 rows=1 width=190) (actual time=16060.107..16060.127 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=1685136 read=193969 -> Merge Join (cost=395548.99..829548.99 rows=1 width=190) (actual time=12011.308..16048.977 rows=4714 loops=1) Merge Cond: (part.p_partkey = public.partsupp.ps_partkey) Join Filter: (public.partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1729 Buffers: shared hit=1685128 read=193969 -> Index Scan using pk_part on part (cost=0.00..102473.47 rows=8111 width=30) (actual time=1.918..1786.534 rows=8019 loops=1) Filter: (((p_type)::text ~~ '%COPPER'::text) AND (p_size = 47)) Rows Removed by Filter: 1991981 Buffers: shared hit=41267 read=5474 -> Sort (cost=395548.99..399548.99 rows=1600000 width=168) (actual time=12008.957..12637.694 rows=1603316 loops=1) Sort Key: public.partsupp.ps_partkey Sort Method: quicksort Memory: 475045kB Buffers: shared hit=1485792 read=184487 -> Nested Loop (cost=1.56..230671.86 rows=1600000 width=168) (actual time=0.132..9250.789 rows=1603360 loops=1) Buffers: shared hit=1485792 read=184487 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.100..200.847 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=0.015..0.017 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=0.074..174.899 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=0.020..58.126 rows=100000 loops=1) Buffers: shared hit=2179 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.024..0.024 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=0.009..0.017 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=0.028..0.420 rows=80 loops=20042) Index Cond: (ps_suppkey = public.supplier.s_suppkey) Buffers: shared hit=1483611 read=184487 SubPlan 1 -> Aggregate (cost=49.85..49.86 rows=1 width=4) (actual time=0.115..0.115 rows=1 loops=6443) Buffers: shared hit=158069 read=4008 -> Nested Loop (cost=0.00..49.84 rows=1 width=4) (actual time=0.076..0.111 rows=2 loops=6443) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=158069 read=4008 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.004..0.005 rows=1 loops=6443) Filter: (r_name = 'MIDDLE EAST'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6443 -> Nested Loop (cost=0.00..48.73 rows=4 width=8) (actual time=0.049..0.103 rows=4 loops=6443) Buffers: shared hit=151626 read=4008 -> Nested Loop (cost=0.00..47.61 rows=4 width=8) (actual time=0.041..0.081 rows=4 loops=6443) Buffers: shared hit=100082 read=4008 -> Index Scan using pk_partsupp on partsupp (cost=0.00..14.45 rows=4 width=8) (actual time=0.028..0.030 rows=4 loops=6443) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=22609 read=4008 -> 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=25772) Index Cond: (s_suppkey = public.partsupp.ps_suppkey) Buffers: shared hit=77473 -> Index Scan using pk_nation on nation (cost=0.00..0.27 rows=1 width=8) (actual time=0.004..0.004 rows=1 loops=25772) Index Cond: (n_nationkey = public.supplier.s_nationkey) Buffers: shared hit=51544 Total runtime: 16122.051 ms (67 rows) COMMIT; COMMIT