SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function bitmapMax (children 1)
     ExpressionList (children 1)
      Function bitmapBuild (children 1)
       ExpressionList (children 1)
        Function emptyArrayUInt8 (children 1)
         ExpressionList