SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 5)
   ExpressionList (children 6)
    Function toStartOfMinute (alias dt_m) (children 1)
     ExpressionList (children 1)
      Identifier datetime
    Identifier domain
    Function divide (children 1)
     ExpressionList (children 2)
      Function sum (children 1)
       ExpressionList (children 1)
        Identifier retry_count
      Function sum (children 1)
       ExpressionList (children 1)
        Identifier duration
    Function avg (children 1)
     ExpressionList (children 1)
      Function divide (children 1)
       ExpressionList (children 2)
        Identifier retry_count
        Identifier duration
    Function divide (children 1)
     ExpressionList (children 2)
      Function countIf (children 1)
       ExpressionList (children 1)
        Function greater (children 1)
         ExpressionList (children 2)
          Identifier block_count
          Literal UInt64_0
      Function count (children 1)
       ExpressionList
    Function divide (children 1)
     ExpressionList (children 2)
      Function countIf (children 1)
       ExpressionList (children 1)
        Function equals (children 1)
         ExpressionList (children 2)
          Identifier first_time
          Literal UInt64_0
      Function count (children 1)
       ExpressionList
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier projection_test
   ExpressionList (children 2)
    Identifier dt_m
    Identifier domain
   Function equals (children 1)
    ExpressionList (children 2)
     Identifier domain
     Literal \'19\'
   ExpressionList (children 2)
    OrderByElement (children 1)
     Identifier dt_m
    OrderByElement (children 1)
     Identifier domain