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 = 44 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=825907.63..825907.64 rows=1 width=190) (actual time=27904.730..27904.772 rows=100 loops=1) Buffers: shared hit=1817351 read=60000 written=4460 -> Sort (cost=825907.63..825907.64 rows=1 width=190) (actual time=27904.727..27904.751 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=1817351 read=60000 written=4460 -> Merge Join (cost=395548.32..825907.62 rows=1 width=190) (actual time=20358.866..27890.419 rows=4746 loops=1) Merge Cond: (part.p_partkey = public.partsupp.ps_partkey) Join Filter: (public.partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1652 Buffers: shared hit=1817343 read=60000 written=4460 -> Index Scan using pk_part on part (cost=0.00..102473.47 rows=8018 width=30) (actual time=0.067..3944.974 rows=8075 loops=1) Filter: (((p_type)::text ~~ '%TIN'::text) AND (p_size = 44)) Rows Removed by Filter: 1991925 Buffers: shared hit=7992 read=38749 written=3310 -> Sort (cost=395548.32..399548.32 rows=1600000 width=168) (actual time=20358.489..20884.269 rows=1602945 loops=1) Sort Key: public.partsupp.ps_partkey Sort Method: quicksort Memory: 474939kB Buffers: shared hit=1651619 read=18063 written=910 -> Nested Loop (cost=1.56..230671.20 rows=1600000 width=168) (actual time=0.214..18162.239 rows=1602960 loops=1) Buffers: shared hit=1651619 read=18063 written=910 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.069..273.446 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..0.015 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=0.047..240.815 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..86.640 rows=100000 loops=1) Buffers: shared hit=2179 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.021..0.021 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=0.081..0.857 rows=80 loops=20037) Index Cond: (ps_suppkey = public.supplier.s_suppkey) Buffers: shared hit=1649438 read=18063 written=910 SubPlan 1 -> Aggregate (cost=49.85..49.86 rows=1 width=4) (actual time=0.336..0.336 rows=1 loops=6398) Buffers: shared hit=157732 read=3188 written=240 -> Nested Loop (cost=0.00..49.84 rows=1 width=4) (actual time=0.235..0.330 rows=2 loops=6398) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=157732 read=3188 written=240 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.023..0.025 rows=1 loops=6398) Filter: (r_name = 'ASIA'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6398 -> Nested Loop (cost=0.00..48.73 rows=4 width=8) (actual time=0.154..0.302 rows=4 loops=6398) Buffers: shared hit=151334 read=3188 written=240 -> Nested Loop (cost=0.00..47.61 rows=4 width=8) (actual time=0.118..0.217 rows=4 loops=6398) Buffers: shared hit=100150 read=3188 written=240 -> Index Scan using pk_partsupp on partsupp (cost=0.00..14.45 rows=4 width=8) (actual time=0.071..0.075 rows=4 loops=6398) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=23224 read=3188 written=240 -> Index Scan using pk_supplier on supplier (cost=0.00..8.28 rows=1 width=8) (actual time=0.033..0.033 rows=1 loops=25592) Index Cond: (s_suppkey = public.partsupp.ps_suppkey) Buffers: shared hit=76926 -> Index Scan using pk_nation on nation (cost=0.00..0.27 rows=1 width=8) (actual time=0.019..0.020 rows=1 loops=25592) Index Cond: (n_nationkey = public.supplier.s_nationkey) Buffers: shared hit=51184 Total runtime: 27936.320 ms (67 rows) COMMIT; COMMIT