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https://issues.apache.org/jira/browse/TRAFODION-2874?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16347337#comment-16347337
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Sandhya Sundaresan commented on TRAFODION-2874:
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Added syntax to return both filename and offset. The offset of a particular 
lobhandle within the LOB hdfs data file may help with UDF parallelization. We 
could colocate ESPs on the same node where the lobhandle offset is stored for 
efficient reading/streaming. 

> LOB: Add syntax to return filename  of a LOB data file for external LOBs.
> -------------------------------------------------------------------------
>
>                 Key: TRAFODION-2874
>                 URL: https://issues.apache.org/jira/browse/TRAFODION-2874
>             Project: Apache Trafodion
>          Issue Type: Bug
>          Components: sql-exe
>    Affects Versions: 2.3
>            Reporter: Sandhya Sundaresan
>            Assignee: Sandhya Sundaresan
>            Priority: Major
>
> For external LOBs,  Trafodion does not save the LOB data in it's internal 
> trafodion namespace. It saves only the LOB  handle information and the actual 
> LOB data remains outside in users namespace in HDFS.    So inserts are very 
> eifficient. During extract from an external LOB today, we extract the LOB 
> data from the external file and return it to the user. Need to extend the 
> Extract syntax to also be able to return the external LOB data filename alone 
> . 



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