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 = 11 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=820472.10..820472.10 rows=1 width=190) (actual time=14357.384..14357.418 rows=100 loops=1) Buffers: shared hit=1792591 read=83975 written=6123 -> Sort (cost=820472.10..820472.10 rows=1 width=190) (actual time=14357.381..14357.396 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=1792591 read=83975 written=6123 -> Merge Join (cost=395548.99..820472.09 rows=1 width=190) (actual time=10207.607..14347.385 rows=4708 loops=1) Merge Cond: (part.p_partkey = public.partsupp.ps_partkey) Join Filter: (public.partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1658 Buffers: shared hit=1792583 read=83975 written=6123 -> Index Scan using pk_part on part (cost=0.00..102473.47 rows=7883 width=30) (actual time=0.165..1992.080 rows=7961 loops=1) Filter: (((p_type)::text ~~ '%TIN'::text) AND (p_size = 11)) Rows Removed by Filter: 1992039 Buffers: shared hit=758 read=45983 written=2699 -> Sort (cost=395548.99..399548.99 rows=1600000 width=168) (actual time=10205.708..10848.700 rows=1602947 loops=1) Sort Key: public.partsupp.ps_partkey Sort Method: quicksort Memory: 474939kB Buffers: shared hit=1635817 read=33865 written=3188 -> Nested Loop (cost=1.56..230671.86 rows=1600000 width=168) (actual time=0.148..7329.882 rows=1602960 loops=1) Buffers: shared hit=1635817 read=33865 written=3188 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.087..214.545 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=0.010..0.022 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=0.061..188.368 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=0.015..67.742 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=0.005..0.013 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=0.030..0.323 rows=80 loops=20037) Index Cond: (ps_suppkey = public.supplier.s_suppkey) Buffers: shared hit=1633636 read=33865 written=3188 SubPlan 1 -> Aggregate (cost=49.85..49.86 rows=1 width=4) (actual time=0.105..0.106 rows=1 loops=6366) Buffers: shared hit=156008 read=4127 written=236 -> Nested Loop (cost=0.00..49.84 rows=1 width=4) (actual time=0.068..0.102 rows=2 loops=6366) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=156008 read=4127 written=236 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.004..0.005 rows=1 loops=6366) Filter: (r_name = 'ASIA'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6366 -> Nested Loop (cost=0.00..48.73 rows=4 width=8) (actual time=0.045..0.094 rows=4 loops=6366) Buffers: shared hit=149642 read=4127 written=236 -> Nested Loop (cost=0.00..47.61 rows=4 width=8) (actual time=0.040..0.076 rows=4 loops=6366) Buffers: shared hit=98714 read=4127 written=236 -> Index Scan using pk_partsupp on partsupp (cost=0.00..14.45 rows=4 width=8) (actual time=0.025..0.027 rows=4 loops=6366) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=22195 read=4127 written=236 -> Index Scan using pk_supplier on supplier (cost=0.00..8.28 rows=1 width=8) (actual time=0.010..0.011 rows=1 loops=25464) Index Cond: (s_suppkey = public.partsupp.ps_suppkey) Buffers: shared hit=76519 -> Index Scan using pk_nation on nation (cost=0.00..0.27 rows=1 width=8) (actual time=0.003..0.003 rows=1 loops=25464) Index Cond: (n_nationkey = public.supplier.s_nationkey) Buffers: shared hit=50928 Total runtime: 14449.356 ms (67 rows) COMMIT; COMMIT