[IOTDB-85] Using a long ID to represent device and sensor (and Path)

• Type: Improvement
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Labels: features
• Assignee: xiangdong Huang
• Reporter: xiangdong Huang
• Created: 23/Apr/19 07:55
• Updated: 27/Sep/21 06:05

Description

Now in IoTDB, all devices and sensors and their Paths are organized by String, as a result, we have many  `Map<String, Object>`  structures.

 

If we can convert the path to a long ID, it is helpful for saving memory and accelerate operations on Map.

 

However, because we support SQLs like `select * from root..a.b.`, simply maping a string to a long is not enough, we have to consider the encoding method from a string to a long carefully to support the above SQLs.

 

Does anyone have good idea?

Issue Links

• relates to: IOTDB-164 Convert Path(String) to ID(Long)