SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 4)
   ExpressionList (children 1)
    Function plus (alias t) (children 1)
     ExpressionList (children 2)
      Function toDateTime (children 1)
       ExpressionList (children 1)
        Literal UInt64_1509138000
      Function multiply (children 1)
       ExpressionList (children 2)
        Identifier number
        Literal UInt64_300
   ExpressionList (children 2)
    Function toHour (alias h) (children 1)
     ExpressionList (children 2)
      Identifier t
      Literal \'Asia/Kolkata\'
    Function toString (alias h_start) (children 1)
     ExpressionList (children 2)
      Function toStartOfHour (children 1)
       ExpressionList (children 2)
        Identifier t
        Literal \'Asia/Kolkata\'
      Literal \'Asia/Kolkata\'
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier system.numbers
   Literal UInt64_12