[jira] [Created] (IOTDB-3349) Operator should not call child.next() twice in one itself next call

[Yuan Tian (Jira)]

Yuan Tian created IOTDB-3349:
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             Summary: Operator should not call child.next() twice in one itself 
next call
                 Key: IOTDB-3349
                 URL: https://issues.apache.org/jira/browse/IOTDB-3349
             Project: Apache IoTDB
          Issue Type: Bug
            Reporter: Yuan Tian
            Assignee: Steve Yurong Su


Child may also return null TsBlock to parent, all Operators except for 
SourceOperator should take it into account.



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