SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function intDivOrZero (children 1)
     ExpressionList (children 2)
      Function CAST (children 1)
       ExpressionList (children 2)
        Literal Int64_-1000
        Literal \'Int64\'
      Function CAST (children 1)
       ExpressionList (children 2)
        Literal UInt64_1000
        Literal \'Int64\'