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 = 35 and p_type like '%TIN' and s_nationkey = n_nationkey and n_regionkey = r_regionkey and r_name = 'ASIA' 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 = 'ASIA' ) order by s_acctbal desc, n_name, s_name, p_partkey LIMIT 100; QUERY PLAN ------------------------------------------------------------------------------------------------------------------------------------------------------------------------ Limit (cost=822915.92..822915.93 rows=1 width=190) (actual time=15678.266..15678.306 rows=100 loops=1) Buffers: shared hit=1676790 read=198455 written=2208 -> Sort (cost=822915.92..822915.93 rows=1 width=190) (actual time=15678.264..15678.286 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=1676790 read=198455 written=2208 -> Merge Join (cost=395548.94..822915.91 rows=1 width=190) (actual time=11285.132..15666.975 rows=4653 loops=1) Merge Cond: (part.p_partkey = public.partsupp.ps_partkey) Join Filter: (public.partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1661 Buffers: shared hit=1676782 read=198455 written=2208 -> Index Scan using pk_part on part (cost=0.00..102473.47 rows=7970 width=30) (actual time=0.084..2175.992 rows=8000 loops=1) Filter: (((p_type)::text ~~ '%TIN'::text) AND (p_size = 35)) Rows Removed by Filter: 1992000 Buffers: shared hit=2683 read=44058 written=1949 -> Sort (cost=395548.90..399548.90 rows=1600000 width=168) (actual time=11284.527..11844.446 rows=1602831 loops=1) Sort Key: public.partsupp.ps_partkey Sort Method: quicksort Memory: 474939kB Buffers: shared hit=1519272 read=150410 written=47 -> Nested Loop (cost=1.56..230671.78 rows=1600000 width=168) (actual time=0.113..8570.407 rows=1602960 loops=1) Buffers: shared hit=1519272 read=150410 written=47 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.065..203.457 rows=20037 loops=1) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 79963 Buffers: shared hit=2181 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.007..0.016 rows=1 loops=1) Filter: (r_name = 'ASIA'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=1 -> Hash Join (cost=1.56..4555.56 rows=100000 width=168) (actual time=0.046..177.766 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..59.739 rows=100000 loops=1) Buffers: shared hit=2179 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.019..0.019 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..0.010 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=0.026..0.383 rows=80 loops=20037) Index Cond: (ps_suppkey = public.supplier.s_suppkey) Buffers: shared hit=1517091 read=150410 written=47 SubPlan 1 -> Aggregate (cost=49.85..49.86 rows=1 width=4) (actual time=0.125..0.125 rows=1 loops=6314) Buffers: shared hit=154827 read=3987 written=212 -> Nested Loop (cost=0.00..49.84 rows=1 width=4) (actual time=0.082..0.121 rows=2 loops=6314) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=154827 read=3987 written=212 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.006..0.008 rows=1 loops=6314) Filter: (r_name = 'ASIA'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6314 -> Nested Loop (cost=0.00..48.73 rows=4 width=8) (actual time=0.052..0.111 rows=4 loops=6314) Buffers: shared hit=148513 read=3987 written=212 -> Nested Loop (cost=0.00..47.61 rows=4 width=8) (actual time=0.045..0.088 rows=4 loops=6314) Buffers: shared hit=98001 read=3987 written=212 -> Index Scan using pk_partsupp on partsupp (cost=0.00..14.45 rows=4 width=8) (actual time=0.029..0.032 rows=4 loops=6314) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=22072 read=3987 written=212 -> Index Scan using pk_supplier on supplier (cost=0.00..8.28 rows=1 width=8) (actual time=0.012..0.012 rows=1 loops=25256) Index Cond: (s_suppkey = public.partsupp.ps_suppkey) Buffers: shared hit=75929 -> Index Scan using pk_nation on nation (cost=0.00..0.27 rows=1 width=8) (actual time=0.004..0.004 rows=1 loops=25256) Index Cond: (n_nationkey = public.supplier.s_nationkey) Buffers: shared hit=50512 Total runtime: 15736.234 ms (67 rows) COMMIT; COMMIT