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 = 49 and p_type like '%NICKEL' 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=820820.36..820820.36 rows=1 width=190) (actual time=13205.903..13205.927 rows=100 loops=1) Buffers: shared hit=1684194 read=191668 written=3444 -> Sort (cost=820820.36..820820.36 rows=1 width=190) (actual time=13205.900..13205.916 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=1684194 read=191668 written=3444 -> Merge Join (cost=395548.02..820820.35 rows=1 width=190) (actual time=9937.591..13197.447 rows=4694 loops=1) Merge Cond: (part.p_partkey = public.partsupp.ps_partkey) Join Filter: (public.partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1624 Buffers: shared hit=1684186 read=191668 written=3444 -> Index Scan using pk_part on part (cost=0.00..102473.47 rows=7934 width=30) (actual time=0.217..1409.682 rows=7994 loops=1) Filter: (((p_type)::text ~~ '%NICKEL'::text) AND (p_size = 49)) Rows Removed by Filter: 1992006 Buffers: shared hit=41266 read=5475 written=727 -> Sort (cost=395548.01..399548.01 rows=1600000 width=168) (actual time=9936.874..10477.249 rows=1603277 loops=1) Sort Key: public.partsupp.ps_partkey Sort Method: quicksort Memory: 475045kB Buffers: shared hit=1488190 read=182089 written=2131 -> Nested Loop (cost=1.56..230670.89 rows=1600000 width=168) (actual time=0.072..7233.011 rows=1603360 loops=1) Buffers: shared hit=1488190 read=182089 written=2131 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.058..180.350 rows=20042 loops=1) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 79958 Buffers: shared hit=2179 read=2 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.007..0.008 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=0.044..157.019 rows=100000 loops=1) Hash Cond: (public.supplier.s_nationkey = public.nation.n_nationkey) Buffers: shared hit=2178 read=2 -> Seq Scan on supplier (cost=0.00..3179.00 rows=100000 width=142) (actual time=0.008..53.229 rows=100000 loops=1) Buffers: shared hit=2177 read=2 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.019..0.019 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=0.003..0.004 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=0.023..0.321 rows=80 loops=20042) Index Cond: (ps_suppkey = public.supplier.s_suppkey) Buffers: shared hit=1486011 read=182087 written=2131 SubPlan 1 -> Aggregate (cost=49.85..49.86 rows=1 width=4) (actual time=0.080..0.080 rows=1 loops=6318) Buffers: shared hit=154730 read=4104 written=586 -> Nested Loop (cost=0.00..49.84 rows=1 width=4) (actual time=0.052..0.077 rows=2 loops=6318) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=154730 read=4104 written=586 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.003..0.003 rows=1 loops=6318) Filter: (r_name = 'MIDDLE EAST'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6318 -> Nested Loop (cost=0.00..48.73 rows=4 width=8) (actual time=0.035..0.072 rows=4 loops=6318) Buffers: shared hit=148412 read=4104 written=586 -> Nested Loop (cost=0.00..47.61 rows=4 width=8) (actual time=0.031..0.058 rows=4 loops=6318) Buffers: shared hit=97868 read=4104 written=586 -> Index Scan using pk_partsupp on partsupp (cost=0.00..14.45 rows=4 width=8) (actual time=0.021..0.023 rows=4 loops=6318) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=21925 read=4104 written=586 -> Index Scan using pk_supplier on supplier (cost=0.00..8.28 rows=1 width=8) (actual time=0.007..0.008 rows=1 loops=25272) Index Cond: (s_suppkey = public.partsupp.ps_suppkey) Buffers: shared hit=75943 -> Index Scan using pk_nation on nation (cost=0.00..0.27 rows=1 width=8) (actual time=0.002..0.003 rows=1 loops=25272) Index Cond: (n_nationkey = public.supplier.s_nationkey) Buffers: shared hit=50544 Total runtime: 13246.656 ms (67 rows) COMMIT; COMMIT