[jira] [Created] (IOTDB-1395) Abstract class Expression used by select clauses and where clauses

[Steve Yurong Su (Jira)]

Steve Yurong Su created IOTDB-1395:
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             Summary: Abstract class Expression used by select clauses and 
where clauses
                 Key: IOTDB-1395
                 URL: https://issues.apache.org/jira/browse/IOTDB-1395
             Project: Apache IoTDB
          Issue Type: Sub-task
            Reporter: Steve Yurong Su


See: #3236

 

We use different Expression classes in the select clauses and the where 
clauses, but they have some common points, and we should abstract them.



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