[IOTDB-750] Allow Sub-Devices in IoTDB Server

• Type: New Feature
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.11.0
• Component/s: Core/Engine
• Labels: pull-request-available
• Assignee: Julian Feinauer
• Reporter: Julian Feinauer
• Created: 07/Jun/20 18:38
• Updated: 29/Jan/21 09:18
• Resolved: 09/Jun/20 06:03

Description

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:

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;

Currently the first command succeeds but the second and third fail.

But they should also be possible.

 

Note: Example above is from jixuan1989

Issue Links

• causes: IOTDB-759 Refactor MNode by removing InternalMNode
• relates to: IOTDB-1137 MNode.getLeafCount error when existing sub-device
• links to: GitHub Pull Request #1323