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 = 46 and p_type like '%TIN' 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=827952.43..827952.43 rows=1 width=190) (actual time=63705.159..63705.188 rows=100 loops=1) Buffers: shared hit=1618407 read=262385 written=153 -> Sort (cost=827952.43..827952.43 rows=1 width=190) (actual time=63705.155..63705.175 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=1618407 read=262385 written=153 -> Merge Join (cost=395548.32..827952.42 rows=1 width=190) (actual time=54415.233..63687.200 rows=4759 loops=1) Merge Cond: (part.p_partkey = public.partsupp.ps_partkey) Join Filter: (public.partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1754 Buffers: shared hit=1618399 read=262385 written=153 -> Index Scan using pk_part on part (cost=0.00..102473.47 rows=8069 width=30) (actual time=1.010..3217.932 rows=8091 loops=1) Filter: (((p_type)::text ~~ '%TIN'::text) AND (p_size = 46)) Rows Removed by Filter: 1991909 Buffers: shared hit=40076 read=6665 written=78 -> Sort (cost=395548.32..399548.32 rows=1600000 width=168) (actual time=54413.099..55091.406 rows=1603341 loops=1) Sort Key: public.partsupp.ps_partkey Sort Method: quicksort Memory: 475045kB Buffers: shared hit=1420209 read=250070 -> Nested Loop (cost=1.56..230671.20 rows=1600000 width=168) (actual time=3.045..51208.308 rows=1603360 loops=1) Buffers: shared hit=1420209 read=250070 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=2.600..391.394 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=0.011..0.013 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=2.579..336.553 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=0.014..109.034 rows=100000 loops=1) Buffers: shared hit=2179 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=2.538..2.538 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=2.512..2.518 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=0.154..2.495 rows=80 loops=20042) Index Cond: (ps_suppkey = public.supplier.s_suppkey) Buffers: shared hit=1418028 read=250070 SubPlan 1 -> Aggregate (cost=49.85..49.86 rows=1 width=4) (actual time=0.673..0.673 rows=1 loops=6513) Buffers: shared hit=158114 read=5650 written=75 -> Nested Loop (cost=0.00..49.84 rows=1 width=4) (actual time=0.462..0.667 rows=2 loops=6513) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=158114 read=5650 written=75 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.045..0.046 rows=1 loops=6513) Filter: (r_name = 'MIDDLE EAST'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6513 -> Nested Loop (cost=0.00..48.73 rows=4 width=8) (actual time=0.312..0.617 rows=4 loops=6513) Buffers: shared hit=151601 read=5650 written=75 -> Nested Loop (cost=0.00..47.61 rows=4 width=8) (actual time=0.227..0.416 rows=4 loops=6513) Buffers: shared hit=99497 read=5650 written=75 -> Index Scan using pk_partsupp on partsupp (cost=0.00..14.45 rows=4 width=8) (actual time=0.144..0.151 rows=4 loops=6513) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=21178 read=5650 written=75 -> Index Scan using pk_supplier on supplier (cost=0.00..8.28 rows=1 width=8) (actual time=0.063..0.064 rows=1 loops=26052) Index Cond: (s_suppkey = public.partsupp.ps_suppkey) Buffers: shared hit=78319 -> Index Scan using pk_nation on nation (cost=0.00..0.27 rows=1 width=8) (actual time=0.048..0.048 rows=1 loops=26052) Index Cond: (n_nationkey = public.supplier.s_nationkey) Buffers: shared hit=52104 Total runtime: 63783.607 ms (67 rows) COMMIT; COMMIT