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 = 23 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=829000.39..829000.40 rows=1 width=190) (actual time=12833.356..12833.401 rows=100 loops=1) Buffers: shared hit=1816824 read=64124 written=7296 -> Sort (cost=829000.39..829000.40 rows=1 width=190) (actual time=12833.352..12833.381 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=1816824 read=64124 written=7296 -> Merge Join (cost=395548.99..829000.38 rows=1 width=190) (actual time=8531.448..12823.640 rows=4754 loops=1) Merge Cond: (part.p_partkey = public.partsupp.ps_partkey) Join Filter: (public.partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1761 Buffers: shared hit=1816816 read=64124 written=7296 -> Index Scan using pk_part on part (cost=0.00..102473.47 rows=8097 width=30) (actual time=0.257..2073.760 rows=8061 loops=1) Filter: (((p_type)::text ~~ '%NICKEL'::text) AND (p_size = 23)) Rows Removed by Filter: 1991939 Buffers: shared hit=758 read=45983 written=4103 -> Sort (cost=395548.99..399548.99 rows=1600000 width=168) (actual time=8530.752..9201.205 rows=1603292 loops=1) Sort Key: public.partsupp.ps_partkey Sort Method: quicksort Memory: 475045kB Buffers: shared hit=1656176 read=14103 written=2805 -> Nested Loop (cost=1.56..230671.86 rows=1600000 width=168) (actual time=0.148..6191.852 rows=1603360 loops=1) Buffers: shared hit=1656176 read=14103 written=2805 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.086..181.975 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=0.009..0.010 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=0.067..157.611 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=0.014..55.856 rows=100000 loops=1) Buffers: shared hit=2179 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.022..0.022 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=0.005..0.013 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=0.025..0.270 rows=80 loops=20042) Index Cond: (ps_suppkey = public.supplier.s_suppkey) Buffers: shared hit=1653995 read=14103 written=2805 SubPlan 1 -> Aggregate (cost=49.85..49.86 rows=1 width=4) (actual time=0.104..0.104 rows=1 loops=6515) Buffers: shared hit=159882 read=4038 written=388 -> Nested Loop (cost=0.00..49.84 rows=1 width=4) (actual time=0.068..0.100 rows=2 loops=6515) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=159882 read=4038 written=388 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.004..0.005 rows=1 loops=6515) Filter: (r_name = 'MIDDLE EAST'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6515 -> Nested Loop (cost=0.00..48.73 rows=4 width=8) (actual time=0.045..0.093 rows=4 loops=6515) Buffers: shared hit=153367 read=4038 written=388 -> Nested Loop (cost=0.00..47.61 rows=4 width=8) (actual time=0.039..0.074 rows=4 loops=6515) Buffers: shared hit=101247 read=4038 written=388 -> Index Scan using pk_partsupp on partsupp (cost=0.00..14.45 rows=4 width=8) (actual time=0.026..0.029 rows=4 loops=6515) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=22914 read=4038 written=388 -> Index Scan using pk_supplier on supplier (cost=0.00..8.28 rows=1 width=8) (actual time=0.009..0.010 rows=1 loops=26060) Index Cond: (s_suppkey = public.partsupp.ps_suppkey) Buffers: shared hit=78333 -> 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=26060) Index Cond: (n_nationkey = public.supplier.s_nationkey) Buffers: shared hit=52120 Total runtime: 12938.274 ms (67 rows) COMMIT; COMMIT