[
https://issues.apache.org/jira/browse/HIVE-6901?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Xuefu Zhang updated HIVE-6901:
------------------------------
Description:
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}
was:
Explaining a simple select query that involves a MR phase doesn't show complete
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}
> 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
>
> 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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