Xi Zhang created IOTDB-3068:
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Summary: Reduce redundant function call when calculate expressions
Key: IOTDB-3068
URL: https://issues.apache.org/jira/browse/IOTDB-3068
Project: Apache IoTDB
Issue Type: Improvement
Reporter: Xi Zhang
Assignee: Xi Zhang
When calculate expressions, functions like getTSDatatype and isConstant are
called for every single valid timestamp. But in fact, we just need to call them
once.
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