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 = 32 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=822965.66..822965.66 rows=1 width=190) (actual time=8920.323..8920.372 rows=100 loops=1) Buffers: shared hit=1816331 read=62970 written=1 -> Sort (cost=822965.66..822965.66 rows=1 width=190) (actual time=8920.320..8920.347 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=1816331 read=62970 written=1 -> Merge Join (cost=395548.83..822965.65 rows=1 width=190) (actual time=5667.817..8913.559 rows=4704 loops=1) Merge Cond: (part.p_partkey = public.partsupp.ps_partkey) Join Filter: (public.partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1748 Buffers: shared hit=1816323 read=62970 written=1 -> Index Scan using pk_part on part (cost=0.00..102473.47 rows=7944 width=30) (actual time=0.092..1481.776 rows=7918 loops=1) Filter: (((p_type)::text ~~ '%NICKEL'::text) AND (p_size = 32)) Rows Removed by Filter: 1992082 Buffers: shared hit=1206 read=45535 written=1 -> Sort (cost=395548.83..399548.83 rows=1600000 width=168) (actual time=5666.893..6225.062 rows=1603171 loops=1) Sort Key: public.partsupp.ps_partkey Sort Method: quicksort Memory: 475045kB Buffers: shared hit=1656311 read=13968 -> Nested Loop (cost=1.56..230671.71 rows=1600000 width=168) (actual time=0.069..3953.082 rows=1603360 loops=1) Buffers: shared hit=1656311 read=13968 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.052..118.035 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=0.006..0.006 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=0.039..101.246 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=0.008..38.964 rows=100000 loops=1) Buffers: shared hit=2179 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.017..0.017 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..0.009 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=0.015..0.171 rows=80 loops=20042) Index Cond: (ps_suppkey = public.supplier.s_suppkey) Buffers: shared hit=1654130 read=13968 SubPlan 1 -> Aggregate (cost=49.85..49.86 rows=1 width=4) (actual time=0.069..0.069 rows=1 loops=6452) Buffers: shared hit=158806 read=3467 -> Nested Loop (cost=0.00..49.84 rows=1 width=4) (actual time=0.044..0.066 rows=2 loops=6452) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=158806 read=3467 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.002..0.003 rows=1 loops=6452) Filter: (r_name = 'MIDDLE EAST'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6452 -> Nested Loop (cost=0.00..48.73 rows=4 width=8) (actual time=0.028..0.062 rows=4 loops=6452) Buffers: shared hit=152354 read=3467 -> Nested Loop (cost=0.00..47.61 rows=4 width=8) (actual time=0.025..0.050 rows=4 loops=6452) Buffers: shared hit=100738 read=3467 -> Index Scan using pk_partsupp on partsupp (cost=0.00..14.45 rows=4 width=8) (actual time=0.016..0.018 rows=4 loops=6452) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=23189 read=3467 -> Index Scan using pk_supplier on supplier (cost=0.00..8.28 rows=1 width=8) (actual time=0.007..0.007 rows=1 loops=25808) Index Cond: (s_suppkey = public.partsupp.ps_suppkey) Buffers: shared hit=77549 -> Index Scan using pk_nation on nation (cost=0.00..0.27 rows=1 width=8) (actual time=0.002..0.002 rows=1 loops=25808) Index Cond: (n_nationkey = public.supplier.s_nationkey) Buffers: shared hit=51616 Total runtime: 8984.779 ms (67 rows) COMMIT; COMMIT