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https://issues.apache.org/jira/browse/CALCITE-5039?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17513115#comment-17513115
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itxiangkui commented on CALCITE-5039:
-------------------------------------
We designed a "time series database" based on mysql. The data model has a key
field called "ts" (short for timestamp). The mysql database stores the
timestamp of Long type (GMT+8). When inserting data There will be example code
for "ts=new Date().getTime() ".
We use calcite as the data query framework for the application. If we design
the field of the calcite layer as Timestamp or TIMESTAMP_WITH_LOCAL_TIME_ZONE,
there will be many inconveniences or bugs in use, but if the calcite layer is
also designed as a Long type, we need to create a lot of time functions for
this; if we also design the mysql layer as Timestamp , then the data insertion
will be very complicated.
Therefore, the design of this "ts" will be very tangled and complicated.
> View:Timestamp cannot query Data:Long in GMT+8 TimeZone Env
> -----------------------------------------------------------
>
> Key: CALCITE-5039
> URL: https://issues.apache.org/jira/browse/CALCITE-5039
> Project: Calcite
> Issue Type: Improvement
> Components: core, jdbc-driver
> Affects Versions: 1.29.0, 1.30.0
> Reporter: itxiangkui
> Priority: Major
> Labels: TimeZone, Timestamp
> Attachments: image-2022-03-15-17-07-39-917.png
>
>
> When I have a row like :
> |ts:TimeStamp|channel:String|pv:Long|
> |1647187200000|ios|10|
>
> while 1647187200000 is a timestamp in TimeZone of "GMT+8",the datetime is
> "2022-03-14 00:00:00"
> but you can not query the data using a sql like :
> ```sql
> select * from table where ts='2022-03-14 00:00:00';
> select * from table where ts<'2022-03-14 00:00:01' and ts>'2022-03-13
> 23:59:59' and channel='ios';
> ```
> it is like the jdbc-fether will filter the data when match the
> timestampString,while the timestamp String looks like '2022-03-13 16:00:00'
> or '2022-03-14 08:00:00'
>
>
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