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 = 10 and p_type like '%TIN' and s_nationkey = n_nationkey and n_regionkey = r_regionkey and r_name = 'EUROPE' 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 = 'EUROPE' ) order by s_acctbal desc, n_name, s_name, p_partkey LIMIT 100; QUERY PLAN ------------------------------------------------------------------------------------------------------------------------------------------------------------------------ Limit (cost=828528.80..828528.81 rows=1 width=190) (actual time=13145.030..13145.073 rows=100 loops=1) Buffers: shared hit=1709083 read=165806 written=224 -> Sort (cost=828528.80..828528.81 rows=1 width=190) (actual time=13145.027..13145.052 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=1709083 read=165806 written=224 -> Merge Join (cost=395240.92..828528.79 rows=1 width=190) (actual time=8974.652..13135.656 rows=4618 loops=1) Merge Cond: (part.p_partkey = public.partsupp.ps_partkey) Join Filter: (public.partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1688 Buffers: shared hit=1709075 read=165806 written=224 -> Index Scan using pk_part on part (cost=0.00..102473.47 rows=8141 width=30) (actual time=0.036..2027.930 rows=7869 loops=1) Filter: (((p_type)::text ~~ '%TIN'::text) AND (p_size = 10)) Rows Removed by Filter: 1992131 Buffers: shared hit=759 read=45982 written=163 -> Sort (cost=395240.86..399233.87 rows=1597205 width=168) (actual time=8974.307..9517.330 rows=1602632 loops=1) Sort Key: public.partsupp.ps_partkey Sort Method: quicksort Memory: 474854kB Buffers: shared hit=1553543 read=115883 written=46 -> Nested Loop (cost=1.56..230671.90 rows=1597205 width=168) (actual time=0.159..7012.060 rows=1602640 loops=1) Buffers: shared hit=1553543 read=115883 written=46 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.069..184.146 rows=20033 loops=1) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 79967 Buffers: shared hit=2181 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.007..0.017 rows=1 loops=1) Filter: (r_name = 'EUROPE'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=1 -> Hash Join (cost=1.56..4555.56 rows=100000 width=168) (actual time=0.052..158.548 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..54.035 rows=100000 loops=1) Buffers: shared hit=2179 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.025..0.025 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..0.008 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=0.024..0.310 rows=80 loops=20033) Index Cond: (ps_suppkey = public.supplier.s_suppkey) Buffers: shared hit=1551362 read=115883 written=46 SubPlan 1 -> Aggregate (cost=49.85..49.86 rows=1 width=4) (actual time=0.105..0.105 rows=1 loops=6306) Buffers: shared hit=154773 read=3941 written=15 -> Nested Loop (cost=0.00..49.84 rows=1 width=4) (actual time=0.067..0.100 rows=2 loops=6306) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=154773 read=3941 written=15 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.004..0.005 rows=1 loops=6306) Filter: (r_name = 'EUROPE'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6306 -> Nested Loop (cost=0.00..48.73 rows=4 width=8) (actual time=0.044..0.092 rows=4 loops=6306) Buffers: shared hit=148467 read=3941 written=15 -> Nested Loop (cost=0.00..47.61 rows=4 width=8) (actual time=0.038..0.074 rows=4 loops=6306) Buffers: shared hit=98019 read=3941 written=15 -> Index Scan using pk_partsupp on partsupp (cost=0.00..14.45 rows=4 width=8) (actual time=0.025..0.027 rows=4 loops=6306) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=22190 read=3941 written=15 -> Index Scan using pk_supplier on supplier (cost=0.00..8.28 rows=1 width=8) (actual time=0.010..0.010 rows=1 loops=25224) Index Cond: (s_suppkey = public.partsupp.ps_suppkey) Buffers: shared hit=75829 -> Index Scan using pk_nation on nation (cost=0.00..0.27 rows=1 width=8) (actual time=0.003..0.004 rows=1 loops=25224) Index Cond: (n_nationkey = public.supplier.s_nationkey) Buffers: shared hit=50448 Total runtime: 13183.089 ms (67 rows) COMMIT; COMMIT