SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 5)
   ExpressionList (children 2)
    Function toStartOfHour (alias d64) (children 1)
     ExpressionList (children 1)
      Identifier d64
    Function count (children 1)
     ExpressionList
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier with_fill_date
   ExpressionList (children 1)
    Identifier d64
   ExpressionList (children 1)
    OrderByElement (children 2)
     Identifier d64
     Function toIntervalHour (children 1)
      ExpressionList (children 1)
       Literal UInt64_6
   Literal UInt64_5