asterix-app/src/test/resources/optimizerts/queries/query-issue785.aql

/*
 * Description  : This test case is to verify the fix for issue785
 * https://code.google.com/p/asterixdb/issues/detail?id=785
 * Expected Res : SUCCESS
 * Date         : 2nd Oct. 2014
 */

drop dataverse tpch if exists;
create dataverse tpch;

use dataverse tpch;

create type OrderType as closed {
  o_orderkey: int32,
  o_custkey: int32,
  o_orderstatus: string,
  o_totalprice: double,
  o_orderdate: string,
  o_orderpriority: string,
  o_clerk: string,
  o_shippriority: int32,
  o_comment: string
}

create type CustomerType as closed {
  c_custkey: int32,
  c_name: string,
  c_address: string,
  c_nationkey: int32,
  c_phone: string,
  c_acctbal: double,
  c_mktsegment: string,
  c_comment: string
}

create type SupplierType as closed {
  s_suppkey: int32,
  s_name: string,
  s_address: string,
  s_nationkey: int32,
  s_phone: string,
  s_acctbal: double,
  s_comment: string
}

create type NationType as closed {
  n_nationkey: int32,
  n_name: string,
  n_regionkey: int32,
  n_comment: string
}

create type RegionType as closed {
  r_regionkey: int32,
  r_name: string,
  r_comment: string
}

create dataset Orders(OrderType)
  primary key o_orderkey;
create dataset Supplier(SupplierType)
  primary key s_suppkey;
create dataset Region(RegionType)
  primary key r_regionkey;
create dataset Nation(NationType)
  primary key n_nationkey;
create dataset Customer(CustomerType)
  primary key c_custkey;
create dataset SelectedNation(NationType)
  primary key n_nationkey;

let $t := for $nation in dataset Nation
for $sn in dataset SelectedNation
where $nation.n_nationkey = $sn.n_nationkey  /*+ indexnl */
return {
    "n_nationkey": $nation.n_nationkey,
    "n_name": $nation.n_name
}

let $X := (
for $n in $t
for $customer in dataset Customer
for $order in dataset Orders
where $order.o_custkey = $customer.c_custkey
and  $customer.c_nationkey = $n.n_nationkey
group by $orderdate := $order.o_orderdate, $nation_key := $n.n_nationkey with $order
let $sum := sum(for $o in $order return $o.o_totalprice)
return {
    "nation_key": $nation_key,
    "order_date": $orderdate,
    "sum_price": $sum 
})

for $x in $X
group by $nation_key := $x.nation_key with $x
return {
    "nation_key": $nation_key,
    "sum_price": for $y in $x
                  order by $y.sum_price desc
                  limit 3
                  return {
                    "orderdate": $y.order_date,
                    "sum_price": $y.sum_price
                  }
}