SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 4)
   ExpressionList (children 5)
    Identifier d
    Identifier k
    Identifier m.k1
    Identifier m.k2ID
    Function sum (children 1)
     ExpressionList (children 1)
      Identifier m.s
   TablesInSelectQuery (children 2)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier summing_composite_key
    TablesInSelectQueryElement (children 1)
     ArrayJoin (children 1)
      ExpressionList (children 1)
       Identifier FirstMap (alias m)
   ExpressionList (children 4)
    Identifier d
    Identifier k
    Identifier m.k1
    Identifier m.k2ID
   ExpressionList (children 4)
    OrderByElement (children 1)
     Identifier d
    OrderByElement (children 1)
     Identifier k
    OrderByElement (children 1)
     Identifier m.k1
    OrderByElement (children 1)
     Identifier m.k2ID