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 = 23 and p_type like '%NICKEL' 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=828418.97..828418.98 rows=1 width=190) (actual time=16371.035..16371.067 rows=100 loops=1) Buffers: shared hit=1654200 read=221568 -> Sort (cost=828418.97..828418.98 rows=1 width=190) (actual time=16371.031..16371.052 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: 52kB Buffers: shared hit=1654200 read=221568 -> Merge Join (cost=395374.30..828418.96 rows=1 width=190) (actual time=12217.638..16359.409 rows=4744 loops=1) Merge Cond: (part.p_partkey = public.partsupp.ps_partkey) Join Filter: (public.partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1600 Buffers: shared hit=1654192 read=221568 -> Index Scan using pk_part on part (cost=0.00..102473.47 rows=8134 width=30) (actual time=0.153..1988.382 rows=8061 loops=1) Filter: (((p_type)::text ~~ '%NICKEL'::text) AND (p_size = 23)) Rows Removed by Filter: 1991939 Buffers: shared hit=758 read=45983 -> Sort (cost=395374.30..399370.35 rows=1598418 width=168) (actual time=12216.901..12853.849 rows=1602557 loops=1) Sort Key: public.partsupp.ps_partkey Sort Method: quicksort Memory: 474854kB Buffers: shared hit=1497961 read=171465 -> Nested Loop (cost=1.56..230671.61 rows=1598418 width=168) (actual time=0.101..8354.007 rows=1602640 loops=1) Buffers: shared hit=1497961 read=171465 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.071..186.977 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=0.006..0.018 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=0.056..162.031 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=0.008..54.162 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=0.013..0.018 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=0.027..0.379 rows=80 loops=20033) Index Cond: (ps_suppkey = public.supplier.s_suppkey) Buffers: shared hit=1495780 read=171465 SubPlan 1 -> Aggregate (cost=49.85..49.86 rows=1 width=4) (actual time=0.102..0.103 rows=1 loops=6344) Buffers: shared hit=155473 read=4120 -> Nested Loop (cost=0.00..49.84 rows=1 width=4) (actual time=0.067..0.098 rows=2 loops=6344) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=155473 read=4120 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.004..0.005 rows=1 loops=6344) Filter: (r_name = 'EUROPE'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6344 -> Nested Loop (cost=0.00..48.73 rows=4 width=8) (actual time=0.044..0.091 rows=4 loops=6344) Buffers: shared hit=149129 read=4120 -> Nested Loop (cost=0.00..47.61 rows=4 width=8) (actual time=0.039..0.074 rows=4 loops=6344) Buffers: shared hit=98377 read=4120 -> Index Scan using pk_partsupp on partsupp (cost=0.00..14.45 rows=4 width=8) (actual time=0.026..0.028 rows=4 loops=6344) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=22112 read=4120 -> Index Scan using pk_supplier on supplier (cost=0.00..8.28 rows=1 width=8) (actual time=0.010..0.010 rows=1 loops=25376) Index Cond: (s_suppkey = public.partsupp.ps_suppkey) Buffers: shared hit=76265 -> Index Scan using pk_nation on nation (cost=0.00..0.27 rows=1 width=8) (actual time=0.003..0.003 rows=1 loops=25376) Index Cond: (n_nationkey = public.supplier.s_nationkey) Buffers: shared hit=50752 Total runtime: 16427.599 ms (67 rows) COMMIT; COMMIT