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 = 25 and p_type like '%BRASS' 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=819990.42..819990.42 rows=1 width=190) (actual time=19017.250..19017.297 rows=100 loops=1) Buffers: shared hit=1736861 read=144634 -> Sort (cost=819990.42..819990.42 rows=1 width=190) (actual time=19017.246..19017.269 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=1736861 read=144634 -> Merge Join (cost=395374.30..819990.41 rows=1 width=190) (actual time=12395.718..19003.978 rows=4834 loops=1) Merge Cond: (part.p_partkey = public.partsupp.ps_partkey) Join Filter: (public.partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1702 Buffers: shared hit=1736853 read=144634 -> Index Scan using pk_part on part (cost=0.00..102473.47 rows=7921 width=30) (actual time=0.097..3449.081 rows=8073 loops=1) Filter: (((p_type)::text ~~ '%BRASS'::text) AND (p_size = 25)) Rows Removed by Filter: 1991927 Buffers: shared hit=6299 read=40442 -> Sort (cost=395374.30..399370.35 rows=1598418 width=168) (actual time=12395.047..12994.905 rows=1603298 loops=1) Sort Key: public.partsupp.ps_partkey Sort Method: quicksort Memory: 475045kB Buffers: shared hit=1570409 read=99870 -> Nested Loop (cost=1.56..230671.61 rows=1598418 width=168) (actual time=0.101..9625.885 rows=1603360 loops=1) Buffers: shared hit=1570409 read=99870 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.081..200.578 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=0.010..0.011 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=0.060..174.472 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=0.013..58.113 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=0.006..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=0.034..0.438 rows=80 loops=20042) Index Cond: (ps_suppkey = public.supplier.s_suppkey) Buffers: shared hit=1568228 read=99870 SubPlan 1 -> Aggregate (cost=49.85..49.86 rows=1 width=4) (actual time=0.241..0.242 rows=1 loops=6536) Buffers: shared hit=160145 read=4322 -> Nested Loop (cost=0.00..49.84 rows=1 width=4) (actual time=0.168..0.236 rows=2 loops=6536) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=160145 read=4322 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.012..0.012 rows=1 loops=6536) Filter: (r_name = 'MIDDLE EAST'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6536 -> Nested Loop (cost=0.00..48.73 rows=4 width=8) (actual time=0.112..0.221 rows=4 loops=6536) Buffers: shared hit=153609 read=4322 -> Nested Loop (cost=0.00..47.61 rows=4 width=8) (actual time=0.098..0.184 rows=4 loops=6536) Buffers: shared hit=101321 read=4322 -> Index Scan using pk_partsupp on partsupp (cost=0.00..14.45 rows=4 width=8) (actual time=0.070..0.074 rows=4 loops=6536) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=22734 read=4322 -> 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=26144) Index Cond: (s_suppkey = public.partsupp.ps_suppkey) Buffers: shared hit=78587 -> Index Scan using pk_nation on nation (cost=0.00..0.27 rows=1 width=8) (actual time=0.007..0.008 rows=1 loops=26144) Index Cond: (n_nationkey = public.supplier.s_nationkey) Buffers: shared hit=52288 Total runtime: 19063.600 ms (67 rows) COMMIT; COMMIT