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=822943.01..822943.02 rows=1 width=190) (actual time=10358.140..10358.187 rows=100 loops=1) Buffers: shared hit=1867816 read=7780 written=2 -> Sort (cost=822943.01..822943.02 rows=1 width=190) (actual time=10358.136..10358.169 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=1867816 read=7780 written=2 -> Merge Join (cost=395240.92..822943.00 rows=1 width=190) (actual time=6978.669..10349.487 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=1867808 read=7780 written=2 -> Index Scan using pk_part on part (cost=0.00..102473.47 rows=8000 width=30) (actual time=0.375..1394.557 rows=7939 loops=1) Filter: (((p_type)::text ~~ '%NICKEL'::text) AND (p_size = 20)) Rows Removed by Filter: 1992061 Buffers: shared hit=46734 read=7 -> Sort (cost=395240.86..399233.87 rows=1597205 width=168) (actual time=6977.670..7569.777 rows=1603324 loops=1) Sort Key: public.partsupp.ps_partkey Sort Method: quicksort Memory: 475045kB Buffers: shared hit=1665442 read=4837 -> Nested Loop (cost=1.56..230671.90 rows=1597205 width=168) (actual time=0.108..4879.545 rows=1603360 loops=1) Buffers: shared hit=1665442 read=4837 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.088..150.344 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=0.009..0.011 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=0.069..128.141 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..45.620 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=0.005..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=0.016..0.211 rows=80 loops=20042) Index Cond: (ps_suppkey = public.supplier.s_suppkey) Buffers: shared hit=1663261 read=4837 SubPlan 1 -> Aggregate (cost=49.85..49.86 rows=1 width=4) (actual time=0.089..0.089 rows=1 loops=6305) Buffers: shared hit=155632 read=2936 written=2 -> Nested Loop (cost=0.00..49.84 rows=1 width=4) (actual time=0.058..0.086 rows=2 loops=6305) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=155632 read=2936 written=2 -> 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=0.037..0.079 rows=4 loops=6305) Buffers: shared hit=149327 read=2936 written=2 -> Nested Loop (cost=0.00..47.61 rows=4 width=8) (actual time=0.033..0.064 rows=4 loops=6305) Buffers: shared hit=98887 read=2936 written=2 -> Index Scan using pk_partsupp on partsupp (cost=0.00..14.45 rows=4 width=8) (actual time=0.022..0.024 rows=4 loops=6305) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=23100 read=2936 written=2 -> Index Scan using pk_supplier on supplier (cost=0.00..8.28 rows=1 width=8) (actual time=0.008..0.009 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=0.003..0.003 rows=1 loops=25220) Index Cond: (n_nationkey = public.supplier.s_nationkey) Buffers: shared hit=50440 Total runtime: 10439.565 ms (67 rows) COMMIT; COMMIT