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https://issues.apache.org/jira/browse/IOTDB-3349?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jialin Qiao reassigned IOTDB-3349:
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Assignee: (was: Steve Yurong Su)
> 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
> Priority: Major
> Labels: pull-request-available
>
> Child may also return null TsBlock to parent, all Operators except for
> SourceOperator should take it into account.
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