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https://issues.apache.org/jira/browse/BEAM-7692?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17123339#comment-17123339
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SAILOKESH DIVI commented on BEAM-7692:
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This feature will be very helpful to assign index when reading data
> Create a transform to assign an index when reading data from built in I/O
> transforms
> ------------------------------------------------------------------------------------
>
> Key: BEAM-7692
> URL: https://issues.apache.org/jira/browse/BEAM-7692
> Project: Beam
> Issue Type: New Feature
> Components: io-ideas, io-java-text
> Affects Versions: 2.13.0
> Reporter: SAILOKESH DIVI
> Priority: P2
> Labels: beam
>
> As a beam user
> when using any of the existing beams I/O transforms
> I would like to add an index to each line read as part of the transform.
>
> As spark has zipWithIndex to assign an index when reading files with the beam
> being abstraction layer for may runners. I would expect this feature should
> be added to beam
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