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 = 21 and p_type like '%NICKEL' 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=828174.39..828174.39 rows=1 width=190) (actual time=16668.998..16669.032 rows=100 loops=1) Buffers: shared hit=1811204 read=69764 written=2486 -> Sort (cost=828174.39..828174.39 rows=1 width=190) (actual time=16668.995..16669.016 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=1811204 read=69764 written=2486 -> Merge Join (cost=395522.09..828174.38 rows=1 width=190) (actual time=11473.199..16656.323 rows=4838 loops=1) Merge Cond: (part.p_partkey = public.partsupp.ps_partkey) Join Filter: (public.partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1682 Buffers: shared hit=1811196 read=69764 written=2486 -> Index Scan using pk_part on part (cost=0.00..102473.47 rows=8076 width=30) (actual time=0.515..2644.298 rows=8094 loops=1) Filter: (((p_type)::text ~~ '%NICKEL'::text) AND (p_size = 21)) Rows Removed by Filter: 1991906 Buffers: shared hit=2912 read=43829 written=2232 -> Sort (cost=395522.09..399521.49 rows=1599760 width=168) (actual time=11472.221..12057.123 rows=1603190 loops=1) Sort Key: public.partsupp.ps_partkey Sort Method: quicksort Memory: 475045kB Buffers: shared hit=1648560 read=21719 written=5 -> Nested Loop (cost=1.56..230671.43 rows=1599760 width=168) (actual time=0.136..9117.436 rows=1603360 loops=1) Buffers: shared hit=1648560 read=21719 written=5 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.097..202.907 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=0.077..176.485 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=0.010..61.768 rows=100000 loops=1) Buffers: shared hit=2179 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.041..0.041 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=0.021..0.030 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=0.034..0.408 rows=80 loops=20042) Index Cond: (ps_suppkey = public.supplier.s_suppkey) Buffers: shared hit=1646379 read=21719 written=5 SubPlan 1 -> Aggregate (cost=49.85..49.86 rows=1 width=4) (actual time=0.167..0.167 rows=1 loops=6520) Buffers: shared hit=159724 read=4216 written=249 -> Nested Loop (cost=0.00..49.84 rows=1 width=4) (actual time=0.112..0.162 rows=2 loops=6520) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=159724 read=4216 written=249 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.005..0.005 rows=1 loops=6520) Filter: (r_name = 'MIDDLE EAST'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6520 -> Nested Loop (cost=0.00..48.73 rows=4 width=8) (actual time=0.078..0.153 rows=4 loops=6520) Buffers: shared hit=153204 read=4216 written=249 -> Nested Loop (cost=0.00..47.61 rows=4 width=8) (actual time=0.067..0.120 rows=4 loops=6520) Buffers: shared hit=101044 read=4216 written=249 -> Index Scan using pk_partsupp on partsupp (cost=0.00..14.45 rows=4 width=8) (actual time=0.044..0.047 rows=4 loops=6520) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=22657 read=4216 written=249 -> Index Scan using pk_supplier on supplier (cost=0.00..8.28 rows=1 width=8) (actual time=0.016..0.016 rows=1 loops=26080) Index Cond: (s_suppkey = public.partsupp.ps_suppkey) Buffers: shared hit=78387 -> Index Scan using pk_nation on nation (cost=0.00..0.27 rows=1 width=8) (actual time=0.007..0.007 rows=1 loops=26080) Index Cond: (n_nationkey = public.supplier.s_nationkey) Buffers: shared hit=52160 Total runtime: 16731.977 ms (67 rows) COMMIT; COMMIT