SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 4)
   ExpressionList (children 6)
    Identifier date (alias period)
    Literal UInt64_1 (alias having_check)
    Function min (alias period_start) (children 1)
     ExpressionList (children 1)
      Identifier date
    Function addDays (alias period_end) (children 1)
     ExpressionList (children 2)
      Function max (children 1)
       ExpressionList (children 1)
        Identifier date
      Literal UInt64_1
    Function dateDiff (alias total_duration) (children 1)
     ExpressionList (children 3)
      Literal \'second\'
      Identifier period_start
      Identifier period_end
    Function sum (alias metric_) (children 1)
     ExpressionList (children 1)
      Identifier metric
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier repro_hits
   ExpressionList (children 1)
    Identifier period
   Function notEquals (children 1)
    ExpressionList (children 2)
     Identifier having_check
     Literal Int64_-1
