[IOTDB-632] Performance improve for Linear Fill

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.10.0
• Component/s: Core/Engine
• Labels: features pull-request-available pull-requests-available
• Assignee: Wei Shao
• Reporter: Wei Shao
• Created: 30/Apr/20 10:02
• Updated: 08/May/20 02:16
• Resolved: 08/May/20 02:03

Description

Consider the Linear Fill function within range [T-before_range, T+after_range].
In current implementation, the query executor will search from the beginning of the timeseries if before_range is infinite value, which is time consuming.

The new implementation should be able to accelerate Linear Fill by searching the result within [T-before_range, T] in an inverse order.

 

Issue Links

• links to: GitHub Pull Request #1136