[IOTDB-1085] Refactoring "transformQuery" method - ASF JIRA

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Details

Type: Improvement
Status: Closed
Priority: Critical
Resolution: Fixed
Affects Version/s: None
Fix Version/s: None
Component/s: Others
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Description

Currently, the method of org.apache.iotdb.db.qp.strategy.PhysicalGenerator#transformQuery has reached about 300 line, and there are lots of "if else" in this method. In order to easily maintain it, it should be refactored into more readable one, I think.

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