SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 4)
   ExpressionList (children 4)
    Identifier x1
    Function multiply (children 1)
     ExpressionList (children 2)
      Identifier x1
      Literal UInt64_2
    Function max (children 1)
     ExpressionList (children 1)
      Identifier x2
    Function max (children 1)
     ExpressionList (children 1)
      Identifier x3
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier test2
   ExpressionList (children 3)
    Literal UInt64_2
    Literal UInt64_1
    Identifier x1
   ExpressionList (children 4)
    OrderByElement (children 1)
     Literal UInt64_1
    OrderByElement (children 1)
     Literal UInt64_2
    OrderByElement (children 1)
     Literal Int64_-1
    OrderByElement (children 1)
     Literal Int64_-2