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 = 46 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=823037.46..823037.47 rows=1 width=190) (actual time=23696.989..23697.028 rows=100 loops=1) Buffers: shared hit=1653200 read=216858 written=25 -> Sort (cost=823037.46..823037.47 rows=1 width=190) (actual time=23696.985..23697.007 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=1653200 read=216858 written=25 -> Merge Join (cost=395522.09..823037.45 rows=1 width=190) (actual time=19458.222..23687.437 rows=4535 loops=1) Merge Cond: (part.p_partkey = public.partsupp.ps_partkey) Join Filter: (public.partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1550 Buffers: shared hit=1653192 read=216858 written=25 -> Index Scan using pk_part on part (cost=0.00..102473.47 rows=7948 width=30) (actual time=0.192..1825.877 rows=7843 loops=1) Filter: (((p_type)::text ~~ '%COPPER'::text) AND (p_size = 46)) Rows Removed by Filter: 1992157 Buffers: shared hit=41276 read=5465 -> Sort (cost=395522.09..399521.49 rows=1599760 width=168) (actual time=19457.757..20095.683 rows=1603276 loops=1) Sort Key: public.partsupp.ps_partkey Sort Method: quicksort Memory: 475045kB Buffers: shared hit=1462183 read=208096 written=25 -> Nested Loop (cost=1.56..230671.43 rows=1599760 width=168) (actual time=0.104..16805.251 rows=1603360 loops=1) Buffers: shared hit=1462183 read=208096 written=25 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.086..242.412 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=0.010..0.011 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=0.066..212.249 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=0.013..71.081 rows=100000 loops=1) Buffers: shared hit=2179 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.028..0.028 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=0.069..0.788 rows=80 loops=20042) Index Cond: (ps_suppkey = public.supplier.s_suppkey) Buffers: shared hit=1460002 read=208096 written=25 SubPlan 1 -> Aggregate (cost=49.85..49.86 rows=1 width=4) (actual time=0.145..0.145 rows=1 loops=6085) Buffers: shared hit=149733 read=3297 -> Nested Loop (cost=0.00..49.84 rows=1 width=4) (actual time=0.095..0.141 rows=2 loops=6085) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=149733 read=3297 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.004..0.004 rows=1 loops=6085) Filter: (r_name = 'MIDDLE EAST'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6085 -> Nested Loop (cost=0.00..48.73 rows=4 width=8) (actual time=0.066..0.134 rows=4 loops=6085) Buffers: shared hit=143648 read=3297 -> Nested Loop (cost=0.00..47.61 rows=4 width=8) (actual time=0.055..0.104 rows=4 loops=6085) Buffers: shared hit=94968 read=3297 -> Index Scan using pk_partsupp on partsupp (cost=0.00..14.45 rows=4 width=8) (actual time=0.037..0.040 rows=4 loops=6085) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=21813 read=3297 -> Index Scan using pk_supplier on supplier (cost=0.00..8.28 rows=1 width=8) (actual time=0.014..0.014 rows=1 loops=24340) Index Cond: (s_suppkey = public.partsupp.ps_suppkey) Buffers: shared hit=73155 -> Index Scan using pk_nation on nation (cost=0.00..0.27 rows=1 width=8) (actual time=0.006..0.006 rows=1 loops=24340) Index Cond: (n_nationkey = public.supplier.s_nationkey) Buffers: shared hit=48680 Total runtime: 23754.951 ms (67 rows) COMMIT; COMMIT