SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 3)
    Function materialize (children 1)
     ExpressionList (children 1)
      Literal UInt64_2
    Function substr (children 1)
     ExpressionList (children 3)
      Identifier _table
      Literal UInt64_1
      Literal UInt64_10
    Identifier s
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Function merge (children 1)
       ExpressionList (children 2)
        Literal \'test_01155_atomic\'
        Literal \'\'
   ExpressionList (children 2)
    OrderByElement (children 1)
     Identifier _table
    OrderByElement (children 1)
     Identifier s
