SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function groupArraySorted (children 2)
     ExpressionList (children 1)
      Function tuple (children 1)
       ExpressionList (children 2)
        Function CAST (children 1)
         ExpressionList (children 2)
          Identifier timestamp
          Literal \'Decimal(20, 3)\'
        Identifier value
     ExpressionList (children 1)
      Literal UInt64_20
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier ts_raw_data
