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https://issues.apache.org/jira/browse/NIFI-2200?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Koji Kawamura resolved NIFI-2200.
---------------------------------
    Resolution: Won't Fix

I agree with what [~charlesbc] described. QueryDatabaseTable is designed to 
capture inserted/updated records from a table. "Additional WHERE clauses" might 
be useful to filter out records those are out of interest. Or if sub-query is 
needed for other reason (JOIN?), then creating a VIEW using the sub-query part, 
then use the VIEW from QueryDatabaseTable will be a work-around.

Closing this as "Won't Fix". Please feel free to reopen it if more discussion 
is needed.

> QueryDatabaseTable subquery
> ---------------------------
>
>                 Key: NIFI-2200
>                 URL: https://issues.apache.org/jira/browse/NIFI-2200
>             Project: Apache NiFi
>          Issue Type: Bug
>            Reporter: Nabegh
>            Priority: Major
>
> QueryDatabaseTable throws an exception if given a subquery as the table name 
> with a where condition.
> For example, Table Name =
> (select * from table_name where condition = value) t 
> will throw the following error
> 2016-07-07 16:23:22,668 ERROR [Timer-Driven Process Thread-7] 
> o.a.n.p.standard.QueryDatabaseTable 
> QueryDatabaseTable[id=354261e7-cfa5-4809-a60c-a9c5136faa70] Failed to process 
> session due to org.apache.nifi.processor.exception.FlowFileHandlingException: 
> StandardFlowFileRecord[uuid=5b7fca67-9fd6-4dd3-9cc4-f2a0bfcf7095,claim=,offset=0,name=196391993568910,size=0]
>  transfer relationship not specified: 
> org.apache.nifi.processor.exception.FlowFileHandlingException: 
> StandardFlowFileRecord[uuid=5b7fca67-9fd6-4dd3-9cc4-f2a0bfcf7095,claim=,offset=0,name=196391993568910,size=0]
>  transfer relationship not specified
> 2016-07-07 16:23:22,671 ERROR [Timer-Driven Process Thread-7] 
> o.a.n.p.standard.QueryDatabaseTable 
> org.apache.nifi.processor.exception.FlowFileHandlingException: 
> StandardFlowFileRecord[uuid=5b7fca67-9fd6-4dd3-9cc4-f2a0bfcf7095,claim=,offset=0,name=196391993568910,size=0]
>  transfer relationship not specified
>       at 
> org.apache.nifi.controller.repository.StandardProcessSession.checkpoint(StandardProcessSession.java:212)
>  ~[nifi-framework-core-0.6.1.jar:0.6.1]
>       at 
> org.apache.nifi.controller.repository.StandardProcessSession.commit(StandardProcessSession.java:282)
>  ~[nifi-framework-core-0.6.1.jar:0.6.1]
>       at 
> org.apache.nifi.processors.standard.QueryDatabaseTable.onTrigger(QueryDatabaseTable.java:348)
>  ~[na:na]
>       at 
> org.apache.nifi.controller.StandardProcessorNode.onTrigger(StandardProcessorNode.java:1059)
>  ~[nifi-framework-core-0.6.1.jar:0.6.1]
>       at 
> org.apache.nifi.controller.tasks.ContinuallyRunProcessorTask.call(ContinuallyRunProcessorTask.java:136)
>  [nifi-framework-core-0.6.1.jar:0.6.1]
>       at 
> org.apache.nifi.controller.tasks.ContinuallyRunProcessorTask.call(ContinuallyRunProcessorTask.java:47)
>  [nifi-framework-core-0.6.1.jar:0.6.1]
>       at 
> org.apache.nifi.controller.scheduling.TimerDrivenSchedulingAgent$1.run(TimerDrivenSchedulingAgent.java:123)
>  [nifi-framework-core-0.6.1.jar:0.6.1]
>       at 
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) 
> [na:1.8.0_91]
>       at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308) 
> [na:1.8.0_91]
>       at 
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
>  [na:1.8.0_91]
>       at 
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
>  [na:1.8.0_91]
>       at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
>  [na:1.8.0_91]
>       at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
>  [na:1.8.0_91]
>       at java.lang.Thread.run(Thread.java:745) [na:1.8.0_91]



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