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 = 'ASIA' 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 = 'ASIA' ) order by s_acctbal desc, n_name, s_name, p_partkey LIMIT 100; QUERY PLAN ------------------------------------------------------------------------------------------------------------------------------------------------------------------------ Limit (cost=825027.60..825027.60 rows=1 width=190) (actual time=35789.689..35789.733 rows=100 loops=1) Buffers: shared hit=1769279 read=107202 -> Sort (cost=825027.60..825027.60 rows=1 width=190) (actual time=35789.684..35789.712 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=1769279 read=107202 -> Merge Join (cost=395374.30..825027.59 rows=1 width=190) (actual time=28419.383..35776.713 rows=4728 loops=1) Merge Cond: (part.p_partkey = public.partsupp.ps_partkey) Join Filter: (public.partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1634 Buffers: shared hit=1769271 read=107202 -> Index Scan using pk_part on part (cost=0.00..102473.47 rows=8048 width=30) (actual time=0.844..3738.735 rows=8067 loops=1) Filter: (((p_type)::text ~~ '%NICKEL'::text) AND (p_size = 13)) Rows Removed by Filter: 1991933 Buffers: shared hit=2569 read=44172 -> Sort (cost=395374.30..399370.35 rows=1598418 width=168) (actual time=28417.547..29127.685 rows=1602445 loops=1) Sort Key: public.partsupp.ps_partkey Sort Method: quicksort Memory: 474939kB Buffers: shared hit=1610744 read=58938 -> Nested Loop (cost=1.56..230671.61 rows=1598418 width=168) (actual time=0.117..25651.255 rows=1602960 loops=1) Buffers: shared hit=1610744 read=58938 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.067..295.426 rows=20037 loops=1) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 79963 Buffers: shared hit=2181 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.010..0.023 rows=1 loops=1) Filter: (r_name = 'ASIA'::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..254.919 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..87.663 rows=100000 loops=1) Buffers: shared hit=2179 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.018..0.018 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..0.008 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=0.083..1.229 rows=80 loops=20037) Index Cond: (ps_suppkey = public.supplier.s_suppkey) Buffers: shared hit=1608563 read=58938 SubPlan 1 -> Aggregate (cost=49.85..49.86 rows=1 width=4) (actual time=0.311..0.311 rows=1 loops=6362) Buffers: shared hit=155958 read=4092 -> Nested Loop (cost=0.00..49.84 rows=1 width=4) (actual time=0.216..0.305 rows=2 loops=6362) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=155958 read=4092 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.012..0.014 rows=1 loops=6362) Filter: (r_name = 'ASIA'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6362 -> Nested Loop (cost=0.00..48.73 rows=4 width=8) (actual time=0.148..0.288 rows=4 loops=6362) Buffers: shared hit=149596 read=4092 -> Nested Loop (cost=0.00..47.61 rows=4 width=8) (actual time=0.132..0.244 rows=4 loops=6362) Buffers: shared hit=98700 read=4092 -> Index Scan using pk_partsupp on partsupp (cost=0.00..14.45 rows=4 width=8) (actual time=0.087..0.090 rows=4 loops=6362) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=22223 read=4092 -> Index Scan using pk_supplier on supplier (cost=0.00..8.28 rows=1 width=8) (actual time=0.036..0.036 rows=1 loops=25448) Index Cond: (s_suppkey = public.partsupp.ps_suppkey) Buffers: shared hit=76477 -> Index Scan using pk_nation on nation (cost=0.00..0.27 rows=1 width=8) (actual time=0.009..0.010 rows=1 loops=25448) Index Cond: (n_nationkey = public.supplier.s_nationkey) Buffers: shared hit=50896 Total runtime: 35857.603 ms (67 rows) COMMIT; COMMIT