SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    WithElement (children 1)
     Subquery (children 1)
      SelectWithUnionQuery (children 1)
       ExpressionList (children 2)
        SelectQuery (children 1)
         ExpressionList (children 1)
          Literal \'foo\' (alias n)
        SelectQuery (children 3)
         ExpressionList (children 1)
          Function concat (children 1)
           ExpressionList (children 2)
            Identifier n
            Literal \' bar\'
         TablesInSelectQuery (children 1)
          TablesInSelectQueryElement (children 1)
           TableExpression (children 1)
            TableIdentifier t
         Function less (children 1)
          ExpressionList (children 2)
           Function length (children 1)
            ExpressionList (children 1)
             Identifier n
           Literal UInt64_20
   ExpressionList (children 2)
    Identifier n
    Function toTypeName (children 1)
     ExpressionList (children 1)
      Identifier n
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier t
