[IOTDB-335] Separate query executions of the same timeseries with different aggregate functions may be optimized

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.10.0
• Labels: pull-request-available
• Assignee: Unassigned
• Reporter: Lei Rui
• Created: 03/Dec/19 06:19
• Updated: 04/Feb/20 14:24
• Resolved: 04/Feb/20 10:32

Description

For example,

select avg(s1),sum(s1) from root.sg.d0

select first_value(s1),first_time(s1) from root.sg.d0

select count(s1), sum(s1) from root.sg.d0 group by ([1,100],2ms)

 

The separate query executions of the same timeseries with different aggregate functions may be a waste. Probably they can be achieved in one execution.

Issue Links

• links to: GitHub Pull Request #765