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 = 48 and p_type like '%COPPER' 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=824080.01..824080.02 rows=1 width=190) (actual time=24955.060..24955.092 rows=100 loops=1) Buffers: shared hit=1804100 read=74291 written=25 -> Sort (cost=824080.01..824080.02 rows=1 width=190) (actual time=24955.058..24955.080 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=1804100 read=74291 written=25 -> Merge Join (cost=395374.30..824080.00 rows=1 width=190) (actual time=19514.010..24943.495 rows=4765 loops=1) Merge Cond: (part.p_partkey = public.partsupp.ps_partkey) Join Filter: (public.partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1684 Buffers: shared hit=1804092 read=74291 written=25 -> Index Scan using pk_part on part (cost=0.00..102473.47 rows=8025 width=30) (actual time=0.887..2356.266 rows=8046 loops=1) Filter: (((p_type)::text ~~ '%COPPER'::text) AND (p_size = 48)) Rows Removed by Filter: 1991954 Buffers: shared hit=36792 read=9949 -> Sort (cost=395374.30..399370.35 rows=1598418 width=168) (actual time=19512.725..20167.057 rows=1602559 loops=1) Sort Key: public.partsupp.ps_partkey Sort Method: quicksort Memory: 474854kB Buffers: shared hit=1608528 read=60898 written=25 -> Nested Loop (cost=1.56..230671.61 rows=1598418 width=168) (actual time=0.176..15162.527 rows=1602640 loops=1) Buffers: shared hit=1608528 read=60898 written=25 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.099..240.550 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..0.021 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=0.073..208.261 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=0.016..70.933 rows=100000 loops=1) Buffers: shared hit=2179 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.029..0.029 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=0.006..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=0.049..0.711 rows=80 loops=20033) Index Cond: (ps_suppkey = public.supplier.s_suppkey) Buffers: shared hit=1606347 read=60898 written=25 SubPlan 1 -> Aggregate (cost=49.85..49.86 rows=1 width=4) (actual time=0.227..0.227 rows=1 loops=6449) Buffers: shared hit=158772 read=3444 -> Nested Loop (cost=0.00..49.84 rows=1 width=4) (actual time=0.156..0.222 rows=2 loops=6449) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=158772 read=3444 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.008..0.009 rows=1 loops=6449) Filter: (r_name = 'EUROPE'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6449 -> Nested Loop (cost=0.00..48.73 rows=4 width=8) (actual time=0.104..0.210 rows=4 loops=6449) Buffers: shared hit=152323 read=3444 -> Nested Loop (cost=0.00..47.61 rows=4 width=8) (actual time=0.094..0.178 rows=4 loops=6449) Buffers: shared hit=100731 read=3444 -> Index Scan using pk_partsupp on partsupp (cost=0.00..14.45 rows=4 width=8) (actual time=0.064..0.067 rows=4 loops=6449) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=23181 read=3444 -> Index Scan using pk_supplier on supplier (cost=0.00..8.28 rows=1 width=8) (actual time=0.025..0.025 rows=1 loops=25796) Index Cond: (s_suppkey = public.partsupp.ps_suppkey) Buffers: shared hit=77550 -> Index Scan using pk_nation on nation (cost=0.00..0.27 rows=1 width=8) (actual time=0.006..0.006 rows=1 loops=25796) Index Cond: (n_nationkey = public.supplier.s_nationkey) Buffers: shared hit=51592 Total runtime: 25030.209 ms (67 rows) COMMIT; COMMIT