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 = 12 and p_type like '%BRASS' and s_nationkey = n_nationkey and n_regionkey = r_regionkey and r_name = 'EUROPE' 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 = 'EUROPE' ) order by s_acctbal desc, n_name, s_name, p_partkey LIMIT 100; QUERY PLAN ------------------------------------------------------------------------------------------------------------------------------------------------------------------------ Limit (cost=821020.75..821020.75 rows=1 width=190) (actual time=15270.051..15270.086 rows=100 loops=1) Buffers: shared hit=1652909 read=220795 written=139 -> Sort (cost=821020.75..821020.75 rows=1 width=190) (actual time=15270.050..15270.069 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=1652909 read=220795 written=139 -> Merge Join (cost=395548.94..821020.74 rows=1 width=190) (actual time=10715.033..15258.201 rows=4652 loops=1) Merge Cond: (part.p_partkey = public.partsupp.ps_partkey) Join Filter: (public.partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1611 Buffers: shared hit=1652901 read=220795 written=139 -> Index Scan using pk_part on part (cost=0.00..102473.47 rows=7923 width=30) (actual time=0.509..2275.173 rows=7897 loops=1) Filter: (((p_type)::text ~~ '%BRASS'::text) AND (p_size = 12)) Rows Removed by Filter: 1992103 Buffers: shared hit=1163 read=45578 written=4 -> Sort (cost=395548.90..399548.90 rows=1600000 width=168) (actual time=10713.855..11237.097 rows=1602257 loops=1) Sort Key: public.partsupp.ps_partkey Sort Method: quicksort Memory: 474854kB Buffers: shared hit=1498306 read=171120 written=135 -> Nested Loop (cost=1.56..230671.78 rows=1600000 width=168) (actual time=0.206..8624.174 rows=1602640 loops=1) Buffers: shared hit=1498306 read=171120 written=135 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.092..203.140 rows=20033 loops=1) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 79967 Buffers: shared hit=2181 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.013..0.024 rows=1 loops=1) Filter: (r_name = 'EUROPE'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=1 -> Hash Join (cost=1.56..4555.56 rows=100000 width=168) (actual time=0.065..176.652 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..60.946 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=0.007..0.012 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=0.027..0.385 rows=80 loops=20033) Index Cond: (ps_suppkey = public.supplier.s_suppkey) Buffers: shared hit=1496125 read=171120 written=135 SubPlan 1 -> Aggregate (cost=49.85..49.86 rows=1 width=4) (actual time=0.137..0.137 rows=1 loops=6263) Buffers: shared hit=153432 read=4097 -> Nested Loop (cost=0.00..49.84 rows=1 width=4) (actual time=0.091..0.133 rows=2 loops=6263) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=153432 read=4097 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.006..0.007 rows=1 loops=6263) Filter: (r_name = 'EUROPE'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6263 -> Nested Loop (cost=0.00..48.73 rows=4 width=8) (actual time=0.060..0.123 rows=4 loops=6263) Buffers: shared hit=147169 read=4097 -> Nested Loop (cost=0.00..47.61 rows=4 width=8) (actual time=0.052..0.098 rows=4 loops=6263) Buffers: shared hit=97065 read=4097 -> Index Scan using pk_partsupp on partsupp (cost=0.00..14.45 rows=4 width=8) (actual time=0.035..0.037 rows=4 loops=6263) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=21760 read=4097 -> Index Scan using pk_supplier on supplier (cost=0.00..8.28 rows=1 width=8) (actual time=0.013..0.013 rows=1 loops=25052) Index Cond: (s_suppkey = public.partsupp.ps_suppkey) Buffers: shared hit=75305 -> Index Scan using pk_nation on nation (cost=0.00..0.27 rows=1 width=8) (actual time=0.004..0.005 rows=1 loops=25052) Index Cond: (n_nationkey = public.supplier.s_nationkey) Buffers: shared hit=50104 Total runtime: 15295.918 ms (67 rows) COMMIT; COMMIT