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 '%STEEL' 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=827802.81..827802.82 rows=1 width=190) (actual time=53779.498..53779.541 rows=100 loops=1) Buffers: shared hit=1633968 read=243704 written=25 -> Sort (cost=827802.81..827802.82 rows=1 width=190) (actual time=53779.494..53779.520 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=1633968 read=243704 written=25 -> Merge Join (cost=395548.32..827802.80 rows=1 width=190) (actual time=43327.049..53764.669 rows=4723 loops=1) Merge Cond: (part.p_partkey = public.partsupp.ps_partkey) Join Filter: (public.partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1696 Buffers: shared hit=1633960 read=243704 written=25 -> Index Scan using pk_part on part (cost=0.00..102473.47 rows=8065 width=30) (actual time=0.033..4989.486 rows=8033 loops=1) Filter: (((p_type)::text ~~ '%STEEL'::text) AND (p_size = 28)) Rows Removed by Filter: 1991967 Buffers: shared hit=758 read=45983 -> Sort (cost=395548.32..399548.32 rows=1600000 width=168) (actual time=43320.164..44040.955 rows=1602567 loops=1) Sort Key: public.partsupp.ps_partkey Sort Method: quicksort Memory: 474854kB Buffers: shared hit=1475959 read=193467 written=25 -> Nested Loop (cost=1.56..230671.20 rows=1600000 width=168) (actual time=0.828..40769.410 rows=1602640 loops=1) Buffers: shared hit=1475959 read=193467 written=25 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.719..336.810 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=0.008..0.019 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=0.699..288.618 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=0.009..98.462 rows=100000 loops=1) Buffers: shared hit=2179 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.670..0.670 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=0.644..0.650 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=0.134..1.980 rows=80 loops=20033) Index Cond: (ps_suppkey = public.supplier.s_suppkey) Buffers: shared hit=1473778 read=193467 written=25 SubPlan 1 -> Aggregate (cost=49.85..49.86 rows=1 width=4) (actual time=0.591..0.592 rows=1 loops=6419) Buffers: shared hit=157243 read=4254 -> Nested Loop (cost=0.00..49.84 rows=1 width=4) (actual time=0.417..0.584 rows=2 loops=6419) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=157243 read=4254 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.045..0.046 rows=1 loops=6419) Filter: (r_name = 'EUROPE'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6419 -> Nested Loop (cost=0.00..48.73 rows=4 width=8) (actual time=0.273..0.534 rows=4 loops=6419) Buffers: shared hit=150824 read=4254 -> Nested Loop (cost=0.00..47.61 rows=4 width=8) (actual time=0.195..0.358 rows=4 loops=6419) Buffers: shared hit=99472 read=4254 -> Index Scan using pk_partsupp on partsupp (cost=0.00..14.45 rows=4 width=8) (actual time=0.120..0.126 rows=4 loops=6419) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=22291 read=4254 -> Index Scan using pk_supplier on supplier (cost=0.00..8.28 rows=1 width=8) (actual time=0.055..0.056 rows=1 loops=25676) Index Cond: (s_suppkey = public.partsupp.ps_suppkey) Buffers: shared hit=77181 -> Index Scan using pk_nation on nation (cost=0.00..0.27 rows=1 width=8) (actual time=0.041..0.042 rows=1 loops=25676) Index Cond: (n_nationkey = public.supplier.s_nationkey) Buffers: shared hit=51352 Total runtime: 53862.527 ms (67 rows) COMMIT; COMMIT