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 = 24 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=831343.58..831343.58 rows=1 width=190) (actual time=11417.923..11417.965 rows=100 loops=1) Buffers: shared hit=1828778 read=54276 written=322 -> Sort (cost=831343.58..831343.58 rows=1 width=190) (actual time=11417.918..11417.938 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=1828778 read=54276 written=322 -> Merge Join (cost=395548.02..831343.57 rows=1 width=190) (actual time=8032.794..11410.074 rows=4840 loops=1) Merge Cond: (part.p_partkey = public.partsupp.ps_partkey) Join Filter: (public.partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1757 Buffers: shared hit=1828770 read=54276 written=322 -> Index Scan using pk_part on part (cost=0.00..102473.47 rows=8199 width=30) (actual time=0.141..1513.801 rows=8172 loops=1) Filter: (((p_type)::text ~~ '%COPPER'::text) AND (p_size = 24)) Rows Removed by Filter: 1991828 Buffers: shared hit=9869 read=36872 written=284 -> Sort (cost=395548.01..399548.01 rows=1600000 width=168) (actual time=8031.850..8613.066 rows=1603048 loops=1) Sort Key: public.partsupp.ps_partkey Sort Method: quicksort Memory: 475045kB Buffers: shared hit=1657107 read=13172 -> Nested Loop (cost=1.56..230670.89 rows=1600000 width=168) (actual time=0.091..5621.423 rows=1603360 loops=1) Buffers: shared hit=1657107 read=13172 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.073..170.362 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=0.005..0.006 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=0.059..143.442 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=0.021..50.091 rows=100000 loops=1) Buffers: shared hit=2179 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.020..0.020 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=0.004..0.011 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=0.021..0.241 rows=80 loops=20042) Index Cond: (ps_suppkey = public.supplier.s_suppkey) Buffers: shared hit=1654926 read=13172 SubPlan 1 -> Aggregate (cost=49.85..49.86 rows=1 width=4) (actual time=0.077..0.077 rows=1 loops=6597) Buffers: shared hit=161794 read=4232 written=38 -> Nested Loop (cost=0.00..49.84 rows=1 width=4) (actual time=0.049..0.074 rows=2 loops=6597) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=161794 read=4232 written=38 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.003..0.003 rows=1 loops=6597) Filter: (r_name = 'MIDDLE EAST'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6597 -> Nested Loop (cost=0.00..48.73 rows=4 width=8) (actual time=0.032..0.069 rows=4 loops=6597) Buffers: shared hit=155197 read=4232 written=38 -> Nested Loop (cost=0.00..47.61 rows=4 width=8) (actual time=0.028..0.055 rows=4 loops=6597) Buffers: shared hit=102421 read=4232 written=38 -> Index Scan using pk_partsupp on partsupp (cost=0.00..14.45 rows=4 width=8) (actual time=0.019..0.021 rows=4 loops=6597) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=23100 read=4232 written=38 -> Index Scan using pk_supplier on supplier (cost=0.00..8.28 rows=1 width=8) (actual time=0.007..0.007 rows=1 loops=26388) Index Cond: (s_suppkey = public.partsupp.ps_suppkey) Buffers: shared hit=79321 -> Index Scan using pk_nation on nation (cost=0.00..0.27 rows=1 width=8) (actual time=0.002..0.003 rows=1 loops=26388) Index Cond: (n_nationkey = public.supplier.s_nationkey) Buffers: shared hit=52776 Total runtime: 11488.566 ms (67 rows) COMMIT; COMMIT