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 = 28 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=811371.12..811371.13 rows=1 width=190) (actual time=9329.841..9329.869 rows=100 loops=1) Buffers: shared hit=1777703 read=102549 written=9575 -> Sort (cost=811371.12..811371.13 rows=1 width=190) (actual time=9329.839..9329.859 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=1777703 read=102549 written=9575 -> Merge Join (cost=381593.57..811371.11 rows=1 width=190) (actual time=6838.186..9324.318 rows=4765 loops=1) Merge Cond: (part.p_partkey = partsupp.ps_partkey) Join Filter: (partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1723 Buffers: shared hit=1777695 read=102549 written=9575 -> Index Scan using pk_part on part (cost=0.43..102473.43 rows=8172 width=30) (actual time=0.172..1120.690 rows=8037 loops=1) Filter: (((p_type)::text ~~ '%NICKEL'::text) AND (p_size = 28)) Rows Removed by Filter: 1991963 Buffers: shared hit=41693 read=5048 written=39 -> Sort (cost=381593.06..385591.78 rows=1599488 width=168) (actual time=6837.693..7264.627 rows=1603267 loops=1) Sort Key: partsupp.ps_partkey Sort Method: quicksort Memory: 475045kB Buffers: shared hit=1576360 read=93919 written=9515 -> Nested Loop (cost=2.00..216772.39 rows=1599488 width=168) (actual time=0.064..4595.396 rows=1603360 loops=1) Buffers: shared hit=1576360 read=93919 written=9515 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.051..104.877 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=0.038..89.993 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=0.007..33.815 rows=100000 loops=1) Buffers: shared hit=2179 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.016..0.016 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=0.004..0.007 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=0.016..0.203 rows=80 loops=20042) Index Cond: (ps_suppkey = supplier.s_suppkey) Buffers: shared hit=1574179 read=93919 written=9515 SubPlan 1 -> Aggregate (cost=48.83..48.84 rows=1 width=4) (actual time=0.060..0.060 rows=1 loops=6488) Buffers: shared hit=159642 read=3582 written=21 -> Nested Loop (cost=0.86..48.83 rows=1 width=4) (actual time=0.038..0.058 rows=2 loops=6488) Join Filter: (nation_1.n_regionkey = region_1.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=159642 read=3582 written=21 -> Seq Scan on region region_1 (cost=0.00..1.06 rows=1 width=4) (actual time=0.002..0.002 rows=1 loops=6488) Filter: (r_name = 'MIDDLE EAST'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6488 -> Nested Loop (cost=0.86..47.71 rows=4 width=8) (actual time=0.025..0.054 rows=4 loops=6488) Buffers: shared hit=153154 read=3582 written=21 -> Nested Loop (cost=0.72..47.04 rows=4 width=8) (actual time=0.023..0.044 rows=4 loops=6488) Buffers: shared hit=101250 read=3582 written=21 -> Index Scan using pk_partsupp on partsupp partsupp_1 (cost=0.43..13.75 rows=4 width=8) (actual time=0.015..0.017 rows=4 loops=6488) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=23233 read=3582 written=21 -> Index Scan using pk_supplier on supplier supplier_1 (cost=0.29..8.31 rows=1 width=8) (actual time=0.006..0.006 rows=1 loops=25952) Index Cond: (s_suppkey = partsupp_1.ps_suppkey) Buffers: shared hit=78017 -> 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=25952) Index Cond: (n_nationkey = supplier_1.s_nationkey) Buffers: shared hit=51904 Planning time: 5.055 ms Execution time: 9383.295 ms (68 rows) COMMIT; COMMIT