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 = 21 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=802031.29..802031.30 rows=1 width=190) (actual time=10144.812..10144.847 rows=100 loops=1) Buffers: shared hit=1681152 read=199816 written=7548 -> Sort (cost=802031.29..802031.30 rows=1 width=190) (actual time=10144.809..10144.831 rows=100 loops=1) Sort Key: supplier.s_acctbal, nation.n_name, supplier.s_name, part.p_partkey Sort Method: top-N heapsort Memory: 51kB Buffers: shared hit=1681152 read=199816 written=7548 -> Merge Join (cost=381398.14..802031.28 rows=1 width=190) (actual time=7247.662..10137.544 rows=4838 loops=1) Merge Cond: (part.p_partkey = partsupp.ps_partkey) Join Filter: (partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1682 Buffers: shared hit=1681144 read=199816 written=7548 -> Index Scan using pk_part on part (cost=0.43..102473.43 rows=7948 width=30) (actual time=0.263..1352.776 rows=8094 loops=1) Filter: (((p_type)::text ~~ '%NICKEL'::text) AND (p_size = 21)) Rows Removed by Filter: 1991906 Buffers: shared hit=3195 read=43546 written=2 -> Sort (cost=381397.71..385392.00 rows=1597715 width=168) (actual time=7246.951..7638.407 rows=1603190 loops=1) Sort Key: partsupp.ps_partkey Sort Method: quicksort Memory: 475045kB Buffers: shared hit=1520588 read=149691 written=7546 -> Nested Loop (cost=2.00..216772.52 rows=1597715 width=168) (actual time=0.073..5835.739 rows=1603360 loops=1) Buffers: shared hit=1520588 read=149691 written=7546 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.059..113.881 rows=20042 loops=1) Join Filter: (nation.n_regionkey = 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=0.007..0.008 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=0.045..98.217 rows=100000 loops=1) Hash Cond: (supplier.s_nationkey = nation.n_nationkey) Buffers: shared hit=2180 -> Seq Scan on supplier (cost=0.00..3179.00 rows=100000 width=142) (actual time=0.008..37.874 rows=100000 loops=1) Buffers: shared hit=2179 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.021..0.021 rows=25 loops=1) Buckets: 1024 Batches: 1 Memory Usage: 10kB Buffers: shared hit=1 -> Seq Scan on nation (cost=0.00..1.25 rows=25 width=34) (actual time=0.003..0.008 rows=25 loops=1) Buffers: shared hit=1 -> Index Scan using partsupp_ps_suppkey_idx on partsupp (cost=0.43..9.75 rows=80 width=12) (actual time=0.018..0.263 rows=80 loops=20042) Index Cond: (ps_suppkey = supplier.s_suppkey) Buffers: shared hit=1518407 read=149691 written=7546 SubPlan 1 -> Aggregate (cost=48.83..48.84 rows=1 width=4) (actual time=0.073..0.073 rows=1 loops=6520) Buffers: shared hit=157361 read=6579 -> Nested Loop (cost=0.86..48.83 rows=1 width=4) (actual time=0.048..0.070 rows=2 loops=6520) Join Filter: (nation_1.n_regionkey = region_1.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=157361 read=6579 -> Seq Scan on region region_1 (cost=0.00..1.06 rows=1 width=4) (actual time=0.002..0.003 rows=1 loops=6520) Filter: (r_name = 'MIDDLE EAST'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6520 -> Nested Loop (cost=0.86..47.71 rows=4 width=8) (actual time=0.033..0.066 rows=4 loops=6520) Buffers: shared hit=150841 read=6579 -> Nested Loop (cost=0.72..47.04 rows=4 width=8) (actual time=0.030..0.056 rows=4 loops=6520) Buffers: shared hit=98681 read=6579 -> Index Scan using pk_partsupp on partsupp partsupp_1 (cost=0.43..13.75 rows=4 width=8) (actual time=0.022..0.024 rows=4 loops=6520) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=20294 read=6579 -> Index Scan using pk_supplier on supplier supplier_1 (cost=0.29..8.31 rows=1 width=8) (actual time=0.007..0.007 rows=1 loops=26080) Index Cond: (s_suppkey = partsupp_1.ps_suppkey) Buffers: shared hit=78387 -> Index Scan using pk_nation on nation nation_1 (cost=0.14..0.16 rows=1 width=8) (actual time=0.001..0.002 rows=1 loops=26080) Index Cond: (n_nationkey = supplier_1.s_nationkey) Buffers: shared hit=52160 Planning time: 5.580 ms Execution time: 10167.188 ms (68 rows) COMMIT; COMMIT