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 = 13 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=823037.46..823037.47 rows=1 width=190) (actual time=19950.783..19950.818 rows=100 loops=1) Buffers: shared hit=1783258 read=96962 written=5 -> Sort (cost=823037.46..823037.47 rows=1 width=190) (actual time=19950.779..19950.799 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=1783258 read=96962 written=5 -> Merge Join (cost=395522.09..823037.45 rows=1 width=190) (actual time=14569.615..19936.613 rows=4773 loops=1) Merge Cond: (part.p_partkey = public.partsupp.ps_partkey) Join Filter: (public.partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1715 Buffers: shared hit=1783250 read=96962 written=5 -> Index Scan using pk_part on part (cost=0.00..102473.47 rows=7948 width=30) (actual time=4.781..2656.834 rows=8067 loops=1) Filter: (((p_type)::text ~~ '%NICKEL'::text) AND (p_size = 13)) Rows Removed by Filter: 1991933 Buffers: shared hit=1478 read=45263 -> Sort (cost=395522.09..399521.49 rows=1599760 width=168) (actual time=14563.556..15213.307 rows=1602820 loops=1) Sort Key: public.partsupp.ps_partkey Sort Method: quicksort Memory: 475045kB Buffers: shared hit=1622795 read=47484 written=5 -> Nested Loop (cost=1.56..230671.43 rows=1599760 width=168) (actual time=0.157..11572.378 rows=1603360 loops=1) Buffers: shared hit=1622795 read=47484 written=5 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.112..221.918 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=0.017..0.019 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=0.080..193.135 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..64.725 rows=100000 loops=1) Buffers: shared hit=2179 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.030..0.030 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=0.009..0.022 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=0.040..0.529 rows=80 loops=20042) Index Cond: (ps_suppkey = public.supplier.s_suppkey) Buffers: shared hit=1620614 read=47484 written=5 SubPlan 1 -> Aggregate (cost=49.85..49.86 rows=1 width=4) (actual time=0.180..0.180 rows=1 loops=6488) Buffers: shared hit=158977 read=4215 -> Nested Loop (cost=0.00..49.84 rows=1 width=4) (actual time=0.121..0.174 rows=2 loops=6488) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=158977 read=4215 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.005..0.006 rows=1 loops=6488) Filter: (r_name = 'MIDDLE EAST'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6488 -> Nested Loop (cost=0.00..48.73 rows=4 width=8) (actual time=0.084..0.166 rows=4 loops=6488) Buffers: shared hit=152489 read=4215 -> Nested Loop (cost=0.00..47.61 rows=4 width=8) (actual time=0.071..0.130 rows=4 loops=6488) Buffers: shared hit=100585 read=4215 -> Index Scan using pk_partsupp on partsupp (cost=0.00..14.45 rows=4 width=8) (actual time=0.050..0.053 rows=4 loops=6488) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=22589 read=4215 -> Index Scan using pk_supplier on supplier (cost=0.00..8.28 rows=1 width=8) (actual time=0.017..0.017 rows=1 loops=25952) Index Cond: (s_suppkey = public.partsupp.ps_suppkey) Buffers: shared hit=77996 -> 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=25952) Index Cond: (n_nationkey = public.supplier.s_nationkey) Buffers: shared hit=51904 Total runtime: 20033.104 ms (67 rows) COMMIT; COMMIT