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 = 9 and p_type like '%TIN' and s_nationkey = n_nationkey and n_regionkey = r_regionkey and r_name = 'ASIA' 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 = 'ASIA' ) order by s_acctbal desc, n_name, s_name, p_partkey LIMIT 100; QUERY PLAN ------------------------------------------------------------------------------------------------------------------------------------------------------------------------ Limit (cost=818903.29..818903.30 rows=1 width=190) (actual time=14261.302..14261.346 rows=100 loops=1) Buffers: shared hit=1672548 read=200678 written=8265 -> Sort (cost=818903.29..818903.30 rows=1 width=190) (actual time=14261.299..14261.324 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=1672548 read=200678 written=8265 -> Merge Join (cost=395240.92..818903.28 rows=1 width=190) (actual time=10296.972..14251.751 rows=4639 loops=1) Merge Cond: (part.p_partkey = public.partsupp.ps_partkey) Join Filter: (public.partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1593 Buffers: shared hit=1672540 read=200678 written=8265 -> Index Scan using pk_part on part (cost=0.00..102473.47 rows=7898 width=30) (actual time=0.260..1868.506 rows=7844 loops=1) Filter: (((p_type)::text ~~ '%TIN'::text) AND (p_size = 9)) Rows Removed by Filter: 1992156 Buffers: shared hit=14342 read=32399 written=6599 -> Sort (cost=395240.86..399233.87 rows=1597205 width=168) (actual time=10296.112..10946.768 rows=1602847 loops=1) Sort Key: public.partsupp.ps_partkey Sort Method: quicksort Memory: 474939kB Buffers: shared hit=1504615 read=165067 written=1050 -> Nested Loop (cost=1.56..230671.90 rows=1597205 width=168) (actual time=0.087..6951.952 rows=1602960 loops=1) Buffers: shared hit=1504615 read=165067 written=1050 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.055..184.779 rows=20037 loops=1) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 79963 Buffers: shared hit=2181 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.006..0.021 rows=1 loops=1) Filter: (r_name = 'ASIA'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=1 -> Hash Join (cost=1.56..4555.56 rows=100000 width=168) (actual time=0.039..159.938 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=0.007..55.287 rows=100000 loops=1) Buffers: shared hit=2179 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.016..0.016 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..0.005 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=0.024..0.309 rows=80 loops=20037) Index Cond: (ps_suppkey = public.supplier.s_suppkey) Buffers: shared hit=1502434 read=165067 written=1050 SubPlan 1 -> Aggregate (cost=49.85..49.86 rows=1 width=4) (actual time=0.095..0.095 rows=1 loops=6232) Buffers: shared hit=153583 read=3212 written=616 -> Nested Loop (cost=0.00..49.84 rows=1 width=4) (actual time=0.062..0.091 rows=2 loops=6232) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=153583 read=3212 written=616 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.004..0.005 rows=1 loops=6232) Filter: (r_name = 'ASIA'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6232 -> Nested Loop (cost=0.00..48.73 rows=4 width=8) (actual time=0.041..0.084 rows=4 loops=6232) Buffers: shared hit=147351 read=3212 written=616 -> Nested Loop (cost=0.00..47.61 rows=4 width=8) (actual time=0.036..0.068 rows=4 loops=6232) Buffers: shared hit=97495 read=3212 written=616 -> Index Scan using pk_partsupp on partsupp (cost=0.00..14.45 rows=4 width=8) (actual time=0.024..0.026 rows=4 loops=6232) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=22597 read=3212 written=616 -> Index Scan using pk_supplier on supplier (cost=0.00..8.28 rows=1 width=8) (actual time=0.009..0.009 rows=1 loops=24928) Index Cond: (s_suppkey = public.partsupp.ps_suppkey) Buffers: shared hit=74898 -> Index Scan using pk_nation on nation (cost=0.00..0.27 rows=1 width=8) (actual time=0.002..0.003 rows=1 loops=24928) Index Cond: (n_nationkey = public.supplier.s_nationkey) Buffers: shared hit=49856 Total runtime: 14344.003 ms (67 rows) COMMIT; COMMIT