SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function L2Distance (children 1)
     ExpressionList (children 2)
      Function materialize (children 1)
       ExpressionList (children 1)
        Literal Tuple_(UInt64_1, UInt64_1)
      Literal Tuple_(UInt64_3, Int64_-1)
