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 = 37 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=819446.60..819446.61 rows=1 width=190) (actual time=20021.786..20021.829 rows=100 loops=1) Buffers: shared hit=1667442 read=208274 written=7541 -> Sort (cost=819446.60..819446.61 rows=1 width=190) (actual time=20021.782..20021.810 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=1667442 read=208274 written=7541 -> Merge Join (cost=395522.09..819446.59 rows=1 width=190) (actual time=15654.795..20009.861 rows=4649 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=1667434 read=208274 written=7541 -> Index Scan using pk_part on part (cost=0.00..102473.47 rows=7858 width=30) (actual time=0.990..2089.710 rows=7994 loops=1) Filter: (((p_type)::text ~~ '%STEEL'::text) AND (p_size = 37)) Rows Removed by Filter: 1992006 Buffers: shared hit=758 read=45983 written=6 -> Sort (cost=395522.09..399521.49 rows=1599760 width=168) (actual time=15652.567..16325.532 rows=1603268 loops=1) Sort Key: public.partsupp.ps_partkey Sort Method: quicksort Memory: 475045kB Buffers: shared hit=1511948 read=158331 written=7535 -> Nested Loop (cost=1.56..230671.43 rows=1599760 width=168) (actual time=2.129..13004.918 rows=1603360 loops=1) Buffers: shared hit=1511948 read=158331 written=7535 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.062..236.967 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=0.007..0.008 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=0.048..205.389 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..68.460 rows=100000 loops=1) Buffers: shared hit=2179 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.020..0.020 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..0.008 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=0.037..0.600 rows=80 loops=20042) Index Cond: (ps_suppkey = public.supplier.s_suppkey) Buffers: shared hit=1509767 read=158331 written=7535 SubPlan 1 -> Aggregate (cost=49.85..49.86 rows=1 width=4) (actual time=0.121..0.121 rows=1 loops=6309) Buffers: shared hit=154728 read=3960 -> Nested Loop (cost=0.00..49.84 rows=1 width=4) (actual time=0.080..0.117 rows=2 loops=6309) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=154728 read=3960 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.004..0.005 rows=1 loops=6309) Filter: (r_name = 'MIDDLE EAST'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6309 -> Nested Loop (cost=0.00..48.73 rows=4 width=8) (actual time=0.055..0.110 rows=4 loops=6309) Buffers: shared hit=148419 read=3960 -> Nested Loop (cost=0.00..47.61 rows=4 width=8) (actual time=0.046..0.087 rows=4 loops=6309) Buffers: shared hit=97947 read=3960 -> Index Scan using pk_partsupp on partsupp (cost=0.00..14.45 rows=4 width=8) (actual time=0.031..0.033 rows=4 loops=6309) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=22122 read=3960 -> Index Scan using pk_supplier on supplier (cost=0.00..8.28 rows=1 width=8) (actual time=0.012..0.012 rows=1 loops=25236) Index Cond: (s_suppkey = public.partsupp.ps_suppkey) Buffers: shared hit=75825 -> 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=25236) Index Cond: (n_nationkey = public.supplier.s_nationkey) Buffers: shared hit=50472 Total runtime: 20118.952 ms (67 rows) COMMIT; COMMIT