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 = 5 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=831692.91..831692.92 rows=1 width=190) (actual time=48197.196..48197.239 rows=100 loops=1) Buffers: shared hit=1639513 read=239790 written=1916 -> Sort (cost=831692.91..831692.92 rows=1 width=190) (actual time=48197.193..48197.218 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=1639513 read=239790 written=1916 -> Merge Join (cost=395548.32..831692.90 rows=1 width=190) (actual time=40142.014..48183.649 rows=4718 loops=1) Merge Cond: (part.p_partkey = public.partsupp.ps_partkey) Join Filter: (public.partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1735 Buffers: shared hit=1639505 read=239790 written=1916 -> Index Scan using pk_part on part (cost=0.00..102473.47 rows=8163 width=30) (actual time=1.986..3961.403 rows=8004 loops=1) Filter: (((p_type)::text ~~ '%NICKEL'::text) AND (p_size = 5)) Rows Removed by Filter: 1991996 Buffers: shared hit=5236 read=41505 written=1694 -> Sort (cost=395548.32..399548.32 rows=1600000 width=168) (actual time=40139.070..40747.134 rows=1603270 loops=1) Sort Key: public.partsupp.ps_partkey Sort Method: quicksort Memory: 475045kB Buffers: shared hit=1477028 read=193251 -> Nested Loop (cost=1.56..230671.20 rows=1600000 width=168) (actual time=0.995..37177.964 rows=1603360 loops=1) Buffers: shared hit=1477028 read=193251 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.955..330.148 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=0.014..0.016 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=0.928..287.822 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..96.194 rows=100000 loops=1) Buffers: shared hit=2179 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.026..0.026 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=0.007..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=0.117..1.799 rows=80 loops=20042) Index Cond: (ps_suppkey = public.supplier.s_suppkey) Buffers: shared hit=1474847 read=193251 SubPlan 1 -> Aggregate (cost=49.85..49.86 rows=1 width=4) (actual time=0.395..0.395 rows=1 loops=6453) Buffers: shared hit=157241 read=5034 written=222 -> Nested Loop (cost=0.00..49.84 rows=1 width=4) (actual time=0.274..0.389 rows=2 loops=6453) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=157241 read=5034 written=222 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.024..0.025 rows=1 loops=6453) Filter: (r_name = 'MIDDLE EAST'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6453 -> Nested Loop (cost=0.00..48.73 rows=4 width=8) (actual time=0.189..0.361 rows=4 loops=6453) Buffers: shared hit=150788 read=5034 written=222 -> Nested Loop (cost=0.00..47.61 rows=4 width=8) (actual time=0.146..0.257 rows=4 loops=6453) Buffers: shared hit=99164 read=5034 written=222 -> Index Scan using pk_partsupp on partsupp (cost=0.00..14.45 rows=4 width=8) (actual time=0.099..0.103 rows=4 loops=6453) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=21600 read=5034 written=222 -> Index Scan using pk_supplier on supplier (cost=0.00..8.28 rows=1 width=8) (actual time=0.036..0.036 rows=1 loops=25812) Index Cond: (s_suppkey = public.partsupp.ps_suppkey) Buffers: shared hit=77564 -> Index Scan using pk_nation on nation (cost=0.00..0.27 rows=1 width=8) (actual time=0.024..0.024 rows=1 loops=25812) Index Cond: (n_nationkey = public.supplier.s_nationkey) Buffers: shared hit=51624 Total runtime: 48255.541 ms (67 rows) COMMIT; COMMIT