[IOTDB-2525] Let last cache support none/null/value

• Type: Improvement
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Labels: easy-fix pull-request-available
• Assignee: Unassigned
• Reporter: Jialin Qiao
• Created: 10/Feb/22 04:25
• Updated: 19/Dec/22 01:44

Description

Currently, if a time series has no data written before, the last cache will be null, which we still need to read the disk.

We could import the none status to indicate that this timeseries has no data, no need to read disk anymore.

Issue Links

• links to: GitHub Pull Request #6442