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https://issues.apache.org/jira/browse/HIVE-6901?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Xuefu Zhang updated HIVE-6901:
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Attachment: HIVE-6901.2.patch
> Explain plan doesn't show operator tree for the fetch operator
> --------------------------------------------------------------
>
> Key: HIVE-6901
> URL: https://issues.apache.org/jira/browse/HIVE-6901
> Project: Hive
> Issue Type: Bug
> Components: Query Processor
> Affects Versions: 0.12.0
> Reporter: Xuefu Zhang
> Assignee: Xuefu Zhang
> Priority: Minor
> Attachments: HIVE-6901.1.patch, HIVE-6901.2.patch, HIVE-6901.2.patch,
> HIVE-6901.2.patch, HIVE-6901.2.patch, HIVE-6901.2.patch, HIVE-6901.patch
>
>
> Explaining a simple select query that involves a MR phase doesn't show
> processor tree for the fetch operator.
> {code}
> hive> explain select d from test;
> OK
> STAGE DEPENDENCIES:
> Stage-1 is a root stage
> Stage-0 is a root stage
> STAGE PLANS:
> Stage: Stage-1
> Map Reduce
> Map Operator Tree:
> ...
> Stage: Stage-0
> Fetch Operator
> limit: -1
> {code}
> It would be nice if the operator tree is shown even if there is only one node.
> Please note that in local execution, the operator tree is complete:
> {code}
> hive> explain select * from test;
> OK
> STAGE DEPENDENCIES:
> Stage-0 is a root stage
> STAGE PLANS:
> Stage: Stage-0
> Fetch Operator
> limit: -1
> Processor Tree:
> TableScan
> alias: test
> Statistics: Num rows: 8 Data size: 34 Basic stats: COMPLETE Column
> stats: NONE
> Select Operator
> expressions: d (type: int)
> outputColumnNames: _col0
> Statistics: Num rows: 8 Data size: 34 Basic stats: COMPLETE
> Column stats: NONE
> ListSink
> {code}
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