SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function substringIndexUTF8 (children 1)
     ExpressionList (children 3)
      Function materialize (children 1)
       ExpressionList (children 1)
        Literal \'富强，民主，文明\'
      Literal \'，\'
      Function materialize (children 1)
       ExpressionList (children 1)
        Literal Int64_-2
