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=819052.91..819052.92 rows=1 width=190) (actual time=13532.140..13532.174 rows=100 loops=1) Buffers: shared hit=1652248 read=228720 written=198 -> Sort (cost=819052.91..819052.92 rows=1 width=190) (actual time=13532.137..13532.154 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=1652248 read=228720 written=198 -> Merge Join (cost=395240.92..819052.90 rows=1 width=190) (actual time=9553.890..13521.212 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=1652240 read=228720 written=198 -> Index Scan using pk_part on part (cost=0.00..102473.47 rows=7902 width=30) (actual time=0.299..1968.685 rows=8094 loops=1) Filter: (((p_type)::text ~~ '%NICKEL'::text) AND (p_size = 21)) Rows Removed by Filter: 1991906 Buffers: shared hit=757 read=45984 written=43 -> Sort (cost=395240.86..399233.87 rows=1597205 width=168) (actual time=9553.115..10051.685 rows=1603190 loops=1) Sort Key: public.partsupp.ps_partkey Sort Method: quicksort Memory: 475045kB Buffers: shared hit=1491641 read=178638 written=147 -> Nested Loop (cost=1.56..230671.90 rows=1597205 width=168) (actual time=0.066..7654.660 rows=1603360 loops=1) Buffers: shared hit=1491641 read=178638 written=147 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.053..192.554 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=0.006..0.007 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=0.040..165.805 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..57.741 rows=100000 loops=1) Buffers: shared hit=2179 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.017..0.017 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=0.003..0.005 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=0.024..0.340 rows=80 loops=20042) Index Cond: (ps_suppkey = public.supplier.s_suppkey) Buffers: shared hit=1489460 read=178638 written=147 SubPlan 1 -> Aggregate (cost=49.85..49.86 rows=1 width=4) (actual time=0.098..0.098 rows=1 loops=6520) Buffers: shared hit=159842 read=4098 written=8 -> Nested Loop (cost=0.00..49.84 rows=1 width=4) (actual time=0.062..0.094 rows=2 loops=6520) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=159842 read=4098 written=8 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.004..0.004 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=0.041..0.087 rows=4 loops=6520) Buffers: shared hit=153322 read=4098 written=8 -> Nested Loop (cost=0.00..47.61 rows=4 width=8) (actual time=0.036..0.069 rows=4 loops=6520) Buffers: shared hit=101162 read=4098 written=8 -> Index Scan using pk_partsupp on partsupp (cost=0.00..14.45 rows=4 width=8) (actual time=0.023..0.026 rows=4 loops=6520) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=22775 read=4098 written=8 -> Index Scan using pk_supplier on supplier (cost=0.00..8.28 rows=1 width=8) (actual time=0.009..0.009 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=0.003..0.003 rows=1 loops=26080) Index Cond: (n_nationkey = public.supplier.s_nationkey) Buffers: shared hit=52160 Total runtime: 13567.726 ms (67 rows) COMMIT; COMMIT