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 = 47 and p_type like '%TIN' 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=826506.11..826506.12 rows=1 width=190) (actual time=51623.428..51623.471 rows=100 loops=1) Buffers: shared hit=1648946 read=229735 written=4737 -> Sort (cost=826506.11..826506.12 rows=1 width=190) (actual time=51623.424..51623.450 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=1648946 read=229735 written=4737 -> Merge Join (cost=395548.32..826506.10 rows=1 width=190) (actual time=41898.429..51605.202 rows=4750 loops=1) Merge Cond: (part.p_partkey = public.partsupp.ps_partkey) Join Filter: (public.partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1675 Buffers: shared hit=1648938 read=229735 written=4737 -> Index Scan using pk_part on part (cost=0.00..102473.47 rows=8033 width=30) (actual time=2.374..4641.286 rows=8094 loops=1) Filter: (((p_type)::text ~~ '%TIN'::text) AND (p_size = 47)) Rows Removed by Filter: 1991906 Buffers: shared hit=9448 read=37293 -> Sort (cost=395548.32..399548.32 rows=1600000 width=168) (actual time=41895.101..42603.055 rows=1603158 loops=1) Sort Key: public.partsupp.ps_partkey Sort Method: quicksort Memory: 475045kB Buffers: shared hit=1481530 read=188749 written=4737 -> Nested Loop (cost=1.56..230671.20 rows=1600000 width=168) (actual time=0.135..39439.548 rows=1603360 loops=1) Buffers: shared hit=1481530 read=188749 written=4737 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.104..345.882 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=0.014..0.016 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=0.078..298.654 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=0.021..102.591 rows=100000 loops=1) Buffers: shared hit=2179 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.029..0.029 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..0.013 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=0.129..1.911 rows=80 loops=20042) Index Cond: (ps_suppkey = public.supplier.s_suppkey) Buffers: shared hit=1479349 read=188749 written=4737 SubPlan 1 -> Aggregate (cost=49.85..49.86 rows=1 width=4) (actual time=0.522..0.522 rows=1 loops=6425) Buffers: shared hit=157960 read=3693 -> Nested Loop (cost=0.00..49.84 rows=1 width=4) (actual time=0.374..0.515 rows=2 loops=6425) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=157960 read=3693 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.038..0.038 rows=1 loops=6425) Filter: (r_name = 'MIDDLE EAST'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6425 -> Nested Loop (cost=0.00..48.73 rows=4 width=8) (actual time=0.249..0.473 rows=4 loops=6425) Buffers: shared hit=151535 read=3693 -> Nested Loop (cost=0.00..47.61 rows=4 width=8) (actual time=0.183..0.332 rows=4 loops=6425) Buffers: shared hit=100135 read=3693 -> Index Scan using pk_partsupp on partsupp (cost=0.00..14.45 rows=4 width=8) (actual time=0.109..0.113 rows=4 loops=6425) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=22888 read=3693 -> Index Scan using pk_supplier on supplier (cost=0.00..8.28 rows=1 width=8) (actual time=0.052..0.052 rows=1 loops=25700) Index Cond: (s_suppkey = public.partsupp.ps_suppkey) Buffers: shared hit=77247 -> Index Scan using pk_nation on nation (cost=0.00..0.27 rows=1 width=8) (actual time=0.033..0.034 rows=1 loops=25700) Index Cond: (n_nationkey = public.supplier.s_nationkey) Buffers: shared hit=51400 Total runtime: 51697.365 ms (67 rows) COMMIT; COMMIT