BEGIN; BEGIN create or replace view revenue0 (supplier_no, total_revenue) as select l_suppkey, sum(l_extendedprice * (1 - l_discount)) from lineitem where l_shipdate >= '1996-11-01' and l_shipdate < date'1996-11-01' + interval '90 days' group by l_suppkey; CREATE VIEW EXPLAIN select s_suppkey, s_name, s_address, s_phone, total_revenue from supplier, revenue0 where s_suppkey = supplier_no and total_revenue = ( select max(total_revenue) from revenue0 ) order by s_suppkey; QUERY PLAN --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Remote Subquery Scan on all (datanode_8_1) (cost=23563112.60..23676828.91 rows=37343 width=79) -> Merge Join (cost=23563112.60..23676828.91 rows=37343 width=79) Merge Cond: (supplier.s_suppkey = revenue0.supplier_no) InitPlan 1 (returns $0) -> Aggregate (cost=11695925.18..11695925.19 rows=1 width=8) -> HashAggregate (cost=11695084.96..11695458.39 rows=37343 width=12) Group Key: lineitem_1.l_suppkey -> Remote Subquery Scan on all (datanode_1_1,datanode_2_1,datanode_3_1,datanode_4_1,datanode_5_1,datanode_6_1,datanode_7_1,datanode_8_1) (cost=476486.56..11470516.80 rows=22456816 width=12) -> HashAggregate (cost=476486.56..11470516.80 rows=37343 width=12) Group Key: lineitem_1.l_suppkey -> Bitmap Heap Scan on lineitem lineitem_1 (cost=476486.56..11470516.80 rows=22456816 width=12) Recheck Cond: ((l_shipdate >= '1996-11-01'::date) AND (l_shipdate < '1997-01-30 00:00:00'::timestamp without time zone)) -> Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx (cost=0.00..470872.36 rows=22456816 width=0) Index Cond: ((l_shipdate >= '1996-11-01'::date) AND (l_shipdate < '1997-01-30 00:00:00'::timestamp without time zone)) -> Index Scan using pk_supplier on supplier (cost=0.17..110656.34 rows=1000000 width=71) -> Sort (cost=11867187.23..11867280.59 rows=37343 width=12) Sort Key: revenue0.supplier_no -> Subquery Scan on revenue0 (cost=11863511.08..11864351.30 rows=37343 width=12) -> HashAggregate (cost=11863511.08..11863977.87 rows=37343 width=12) Group Key: lineitem.l_suppkey Filter: (sum((sum((lineitem.l_extendedprice * ('1'::double precision - lineitem.l_discount))))) = $0) -> Remote Subquery Scan on all (datanode_1_1,datanode_2_1,datanode_3_1,datanode_4_1,datanode_5_1,datanode_6_1,datanode_7_1,datanode_8_1) (cost=476486.56..11470516.80 rows=22456816 width=12) -> HashAggregate (cost=476486.56..11470516.80 rows=37343 width=12) Group Key: lineitem.l_suppkey -> Bitmap Heap Scan on lineitem (cost=476486.56..11470516.80 rows=22456816 width=12) Recheck Cond: ((l_shipdate >= '1996-11-01'::date) AND (l_shipdate < '1997-01-30 00:00:00'::timestamp without time zone)) -> Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx (cost=0.00..470872.36 rows=22456816 width=0) Index Cond: ((l_shipdate >= '1996-11-01'::date) AND (l_shipdate < '1997-01-30 00:00:00'::timestamp without time zone)) (28 rows) drop view revenue0; DROP VIEW COMMIT; COMMIT