[jira] [Commented] (IOTDB-750) Allow Sub-Devices in IoTDB Server

["Jialin Qiao (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/IOTDB-750?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17127855#comment-17127855 ] 

Jialin Qiao commented on IOTDB-750:
-----------------------------------

Hi, we do not have this constraints and these three sqls could be executed successfully. Please have a check..

 

!image-2020-06-08-11-56-06-990.png!

> Allow Sub-Devices in IoTDB Server
> ---------------------------------
>
>                 Key: IOTDB-750
>                 URL: https://issues.apache.org/jira/browse/IOTDB-750
>             Project: Apache IoTDB
>          Issue Type: New Feature
>          Components: Core/Engine
>            Reporter: Julian Feinauer
>            Assignee: Julian Feinauer
>            Priority: Major
>              Labels: pull-request-available
>
> Currently, a Node is considered a Device if it has a measurement. Then it is not possible that this devices has a "subpath" which again is a device but only measurements.
>  
> This should be changed so that a Device can also have "subdevices".
>  
> Example:
> {code:java}
> CREATE TIMESERIES root.sg1.d1.s1 with datatype=INT32,encoding=RLE;
> CREATE TIMESERIES root.sg1.d1.d2.s1 with datatype=INT32,encoding=RLE;
> CREATE TIMESERIES root.sg1.d1.d2.s2 with datatype=INT32,encoding=RLE;
> {code}
> Currently the first command succeeds but the second and third fail.
> But they should also be possible.
>  
> Note: Example above is from [~jixuan1989]



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