[IOTDB-5525] Fix the partition error of device after partition fetcher

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Component/s: Core/Engine
• Sprint: 2023-2-Query
• Assignee: Yuan Tian
• Reporter: Yuan Tian
• Created: 13/Feb/23 03:11
• Updated: 13/Feb/23 08:01
• Resolved: 13/Feb/23 03:12

Description

This issue records the following four things we meet in geely POC:

1. Previously, while calculating TTimeSlot for each SeriesSlot, we mistakenly replace previous one with current one which cause the TTimeSlot is incomplete for each SeriesSlot. In write case, we may get IndexOutOfBound error in the later phase.

2. Accelerate the distribution plan phase for group by level query, reducing time complexity from O(N^2) to O(N) for each data region

3. Correct the memory estimation for AggregationOperator.

4. Correct the default value for seriesPartitionExecutorClass from APHashExecutor to BKDRHashExecutor which is same as the one in config file.

Issue Links

• links to: https://github.com/apache/iotdb/pull/8953
• links to: https://github.com/apache/iotdb/pull/9019