SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function dictGetUInt64 (children 1)
     ExpressionList (children 3)
      Literal \'db_01268.dict1\'
      Literal \'second_column\'
      Function toUInt64 (children 1)
       ExpressionList (children 1)
        Literal UInt64_100500