SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 7)
   ExpressionList (children 1)
    Function toStartOfHour (alias a) (children 1)
     ExpressionList (children 1)
      Identifier ts
   ExpressionList (children 1)
    Function sum (alias v) (children 1)
     ExpressionList (children 1)
      Identifier value
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier agg
   Function greater (children 1)
    ExpressionList (children 2)
     Identifier ts
     Literal \'2021-12-06 22:00:00\'
   ExpressionList (children 1)
    Identifier a
   ExpressionList (children 1)
    OrderByElement (children 1)
     Identifier v
   Literal UInt64_5
