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 = 20 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=822040.00..822040.00 rows=1 width=190) (actual time=15362.631..15362.664 rows=100 loops=1) Buffers: shared hit=1677629 read=197967 -> Sort (cost=822040.00..822040.00 rows=1 width=190) (actual time=15362.629..15362.656 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=1677629 read=197967 -> Merge Join (cost=395522.09..822039.99 rows=1 width=190) (actual time=11043.237..15352.631 rows=4681 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=1677621 read=197967 -> Index Scan using pk_part on part (cost=0.00..102473.47 rows=7922 width=30) (actual time=0.289..2146.604 rows=7939 loops=1) Filter: (((p_type)::text ~~ '%NICKEL'::text) AND (p_size = 20)) Rows Removed by Filter: 1992061 Buffers: shared hit=1336 read=45405 -> Sort (cost=395522.09..399521.49 rows=1599760 width=168) (actual time=11042.244..11551.181 rows=1603324 loops=1) Sort Key: public.partsupp.ps_partkey Sort Method: quicksort Memory: 475045kB Buffers: shared hit=1521790 read=148489 -> Nested Loop (cost=1.56..230671.43 rows=1599760 width=168) (actual time=0.097..9014.828 rows=1603360 loops=1) Buffers: shared hit=1521790 read=148489 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.083..201.130 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=0.008..0.009 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=0.065..176.468 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=0.010..62.654 rows=100000 loops=1) Buffers: shared hit=2179 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.026..0.026 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..0.011 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=0.029..0.405 rows=80 loops=20042) Index Cond: (ps_suppkey = public.supplier.s_suppkey) Buffers: shared hit=1519609 read=148489 SubPlan 1 -> Aggregate (cost=49.85..49.86 rows=1 width=4) (actual time=0.129..0.129 rows=1 loops=6305) Buffers: shared hit=154495 read=4073 -> Nested Loop (cost=0.00..49.84 rows=1 width=4) (actual time=0.087..0.125 rows=2 loops=6305) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=154495 read=4073 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.004..0.004 rows=1 loops=6305) Filter: (r_name = 'MIDDLE EAST'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6305 -> Nested Loop (cost=0.00..48.73 rows=4 width=8) (actual time=0.061..0.118 rows=4 loops=6305) Buffers: shared hit=148190 read=4073 -> Nested Loop (cost=0.00..47.61 rows=4 width=8) (actual time=0.053..0.095 rows=4 loops=6305) Buffers: shared hit=97750 read=4073 -> Index Scan using pk_partsupp on partsupp (cost=0.00..14.45 rows=4 width=8) (actual time=0.037..0.039 rows=4 loops=6305) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=21963 read=4073 -> 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=25220) Index Cond: (s_suppkey = public.partsupp.ps_suppkey) Buffers: shared hit=75787 -> Index Scan using pk_nation on nation (cost=0.00..0.27 rows=1 width=8) (actual time=0.004..0.005 rows=1 loops=25220) Index Cond: (n_nationkey = public.supplier.s_nationkey) Buffers: shared hit=50440 Total runtime: 15400.998 ms (67 rows) COMMIT; COMMIT