SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function toDateTime (alias ts) (children 1)
     ExpressionList (children 2)
      Function fromUnixTimestamp64Micro (children 1)
       ExpressionList (children 1)
        Function toInt64 (children 1)
         ExpressionList (children 1)
          Literal UInt64_0
      Literal \'UTC\'
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Function numbers (children 1)
       ExpressionList (children 1)
        Literal UInt64_2