Merge LastQueryScanNode of same device

[shuwenwei]

Description

Merge LastQueryScanNode of same device For a scenario with 2 * 2 * 4 non-aligned devices and 80,000 measurement points per device. When the last cache is hit, the optimization effect of executing the following SQL statement is:

select last * from root.db.aaaaaaa0.bbbbbbb0.**

Before this optimization: After this optimization:

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 59.71223% with 168 lines in your changes missing coverage. Please review.

Project coverage is 39.11%. Comparing base (b8fd089) to head (352191f). Report is 21 commits behind head on master.

Files with missing lines	Patch %	Lines
...ueryengine/plan/planner/OperatorTreeGenerator.java	0.00%	45 Missing :warning:
...an/planner/plan/node/source/LastQueryScanNode.java	52.94%	32 Missing :warning:
.../planner/plan/node/process/last/LastQueryNode.java	55.22%	30 Missing :warning:
.../process/last/AbstractUpdateLastCacheOperator.java	13.33%	13 Missing :warning:
...db/db/queryengine/plan/analyze/AnalyzeVisitor.java	70.58%	10 Missing :warning:
...b/queryengine/plan/planner/LogicalPlanBuilder.java	74.35%	10 Missing :warning:
...gine/plan/planner/distribution/SourceRewriter.java	88.88%	7 Missing :warning:
...ngine/execution/fragment/DataNodeQueryContext.java	16.66%	5 Missing :warning:
...er/distribution/SimpleFragmentParallelPlanner.java	16.66%	5 Missing :warning:
...e/iotdb/db/queryengine/common/MPPQueryContext.java	81.81%	2 Missing :warning:
... and 6 more

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #15735      +/-   ##
============================================
+ Coverage     39.09%   39.11%   +0.01%     
  Complexity      198      198              
============================================
  Files          4839     4839              
  Lines        314856   315188     +332     
  Branches      39530    39567      +37     
============================================
+ Hits         123108   123300     +192     
- Misses       191748   191888     +140     

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[sonarqubecloud[bot]]

Quality Gate passed

Issues
22 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.3% Duplication on New Code

See analysis details on SonarQube Cloud