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 = 37 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=820172.90..820172.91 rows=1 width=190) (actual time=13374.190..13374.223 rows=100 loops=1) Buffers: shared hit=1812690 read=65448 written=6 -> Sort (cost=820172.90..820172.91 rows=1 width=190) (actual time=13374.187..13374.213 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=1812690 read=65448 written=6 -> Merge Join (cost=395548.94..820172.89 rows=1 width=190) (actual time=9378.190..13364.552 rows=4658 loops=1) Merge Cond: (part.p_partkey = public.partsupp.ps_partkey) Join Filter: (public.partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1746 Buffers: shared hit=1812682 read=65448 written=6 -> Index Scan using pk_part on part (cost=0.00..102473.47 rows=7901 width=30) (actual time=0.133..1844.550 rows=7985 loops=1) Filter: (((p_type)::text ~~ '%TIN'::text) AND (p_size = 37)) Rows Removed by Filter: 1992015 Buffers: shared hit=20962 read=25779 -> Sort (cost=395548.90..399548.90 rows=1600000 width=168) (actual time=9377.110..9878.938 rows=1602776 loops=1) Sort Key: public.partsupp.ps_partkey Sort Method: quicksort Memory: 475045kB Buffers: shared hit=1634578 read=35701 written=6 -> Nested Loop (cost=1.56..230671.78 rows=1600000 width=168) (actual time=0.102..7303.550 rows=1603360 loops=1) Buffers: shared hit=1634578 read=35701 written=6 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.080..202.430 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..0.012 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..175.540 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=0.009..58.872 rows=100000 loops=1) Buffers: shared hit=2179 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.028..0.028 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..0.009 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=0.026..0.318 rows=80 loops=20042) Index Cond: (ps_suppkey = public.supplier.s_suppkey) Buffers: shared hit=1632397 read=35701 written=6 SubPlan 1 -> Aggregate (cost=49.85..49.86 rows=1 width=4) (actual time=0.129..0.129 rows=1 loops=6404) Buffers: shared hit=157142 read=3968 -> Nested Loop (cost=0.00..49.84 rows=1 width=4) (actual time=0.086..0.125 rows=2 loops=6404) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=157142 read=3968 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.006..0.006 rows=1 loops=6404) Filter: (r_name = 'MIDDLE EAST'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6404 -> Nested Loop (cost=0.00..48.73 rows=4 width=8) (actual time=0.058..0.116 rows=4 loops=6404) Buffers: shared hit=150738 read=3968 -> Nested Loop (cost=0.00..47.61 rows=4 width=8) (actual time=0.050..0.089 rows=4 loops=6404) Buffers: shared hit=99506 read=3968 -> Index Scan using pk_partsupp on partsupp (cost=0.00..14.45 rows=4 width=8) (actual time=0.032..0.035 rows=4 loops=6404) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=22522 read=3968 -> Index Scan using pk_supplier on supplier (cost=0.00..8.28 rows=1 width=8) (actual time=0.012..0.012 rows=1 loops=25616) Index Cond: (s_suppkey = public.partsupp.ps_suppkey) Buffers: shared hit=76984 -> Index Scan using pk_nation on nation (cost=0.00..0.27 rows=1 width=8) (actual time=0.005..0.005 rows=1 loops=25616) Index Cond: (n_nationkey = public.supplier.s_nationkey) Buffers: shared hit=51232 Total runtime: 13406.547 ms (67 rows) COMMIT; COMMIT