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 = 29 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=833887.32..833887.33 rows=1 width=190) (actual time=42937.961..42937.995 rows=100 loops=1) Buffers: shared hit=1760363 read=121543 written=18 -> Sort (cost=833887.32..833887.33 rows=1 width=190) (actual time=42937.958..42937.974 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=1760363 read=121543 written=18 -> Merge Join (cost=395548.32..833887.31 rows=1 width=190) (actual time=36327.789..42925.016 rows=4814 loops=1) Merge Cond: (part.p_partkey = public.partsupp.ps_partkey) Join Filter: (public.partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1743 Buffers: shared hit=1760355 read=121543 written=18 -> Index Scan using pk_part on part (cost=0.00..102473.47 rows=8217 width=30) (actual time=0.243..2689.071 rows=8016 loops=1) Filter: (((p_type)::text ~~ '%STEEL'::text) AND (p_size = 29)) Rows Removed by Filter: 1991984 Buffers: shared hit=39968 read=6773 -> Sort (cost=395548.32..399548.32 rows=1600000 width=168) (actual time=36326.538..37011.834 rows=1603267 loops=1) Sort Key: public.partsupp.ps_partkey Sort Method: quicksort Memory: 475045kB Buffers: shared hit=1559144 read=111135 written=18 -> Nested Loop (cost=1.56..230671.20 rows=1600000 width=168) (actual time=0.113..33729.315 rows=1603360 loops=1) Buffers: shared hit=1559144 read=111135 written=18 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.093..323.672 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=0.011..0.013 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=0.072..278.391 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=0.018..94.524 rows=100000 loops=1) Buffers: shared hit=2179 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.027..0.027 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=0.006..0.012 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=0.112..1.629 rows=80 loops=20042) Index Cond: (ps_suppkey = public.supplier.s_suppkey) Buffers: shared hit=1556963 read=111135 written=18 SubPlan 1 -> Aggregate (cost=49.85..49.86 rows=1 width=4) (actual time=0.351..0.351 rows=1 loops=6557) Buffers: shared hit=161243 read=3635 -> Nested Loop (cost=0.00..49.84 rows=1 width=4) (actual time=0.241..0.345 rows=2 loops=6557) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=161243 read=3635 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.025..0.026 rows=1 loops=6557) Filter: (r_name = 'MIDDLE EAST'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6557 -> Nested Loop (cost=0.00..48.73 rows=4 width=8) (actual time=0.157..0.316 rows=4 loops=6557) Buffers: shared hit=154686 read=3635 -> Nested Loop (cost=0.00..47.61 rows=4 width=8) (actual time=0.116..0.224 rows=4 loops=6557) Buffers: shared hit=102230 read=3635 -> Index Scan using pk_partsupp on partsupp (cost=0.00..14.45 rows=4 width=8) (actual time=0.073..0.077 rows=4 loops=6557) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=23419 read=3635 -> Index Scan using pk_supplier on supplier (cost=0.00..8.28 rows=1 width=8) (actual time=0.034..0.035 rows=1 loops=26228) Index Cond: (s_suppkey = public.partsupp.ps_suppkey) Buffers: shared hit=78811 -> Index Scan using pk_nation on nation (cost=0.00..0.27 rows=1 width=8) (actual time=0.021..0.021 rows=1 loops=26228) Index Cond: (n_nationkey = public.supplier.s_nationkey) Buffers: shared hit=52456 Total runtime: 43013.292 ms (67 rows) COMMIT; COMMIT