Hi Cheongu,

This should be a bug and may be already fixed in v1.3.0, you can try with
V1.3.0 again. If you can replay this again in V1.3.0, can you give us a
complete replay way? like your sample data and ingestion program.



Best regards,
------------------------
Yuan Tian


On Mon, Apr 8, 2024 at 5:26 PM 김천구 <[email protected]> wrote:

> Hi all,
>
>  I'm currently using version 1.2.2 of  IoTDB, it seems like there might be
> an issue with a data insertion in IoTDB.
>
>  Previously, I have loaded a public dataset into IoTDB that contains
> duplicate records for time.
> I have observed data loss occurring for duplicate timestamps, which is
> expected. However, I have discovered something strange.
>
> IoTDB> select * from root.Chicago.** where time = 1433123100000
>
> +------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
> |                                             Time|
>
>
>               root.Chicago.taxi.value|
>
> +------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
> |2015-06-01T10:45:00.000+09:00|                             {'vendor_name'
> : Blue Diamond, 'location.type' : Point, 'location.latitude' :
> 41.880994471,'location.longitude' : -87.632746489}|
> |2015-06-01T10:45:00.000+09:00| {'vendor_name' : Blue Ribbon Taxi
> Association Inc., 'location.type' : Point, 'location.latitude' :
> 41.97907082,'location.longitude' : -87.903039661}|
>
> +------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
> Total line number = 2
> It costs 0.085s
>
>  Looking at the results above, even though the timestamps are identical,
> there are two tuples inserted. How can two tuples be stored at the same
> time? Since both are referencing the same time series, shouldn't one value
> overwrite the other?
>  Could you explain why such a situation occurred?
>
> Cheongu Kim
>

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