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https://issues.apache.org/jira/browse/BEAM-3201?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16270589#comment-16270589
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Etienne Chauchot commented on BEAM-3201:
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[~chet.aldrich] your summary is correct. I'll just precise
{quote}
Each will require a function that takes in a JSON object and returns a String
*value (from the json element provided by the means the user choses)*, which is
what will be placed in the corresponding *ES bulk metadata place while
inserting* .
{quote}
> ElasticsearchIO should deal with documents id
> ---------------------------------------------
>
> Key: BEAM-3201
> URL: https://issues.apache.org/jira/browse/BEAM-3201
> Project: Beam
> Issue Type: Improvement
> Components: sdk-java-extensions
> Reporter: Etienne Chauchot
> Assignee: Chet Aldrich
>
> Today the ESIO only inserts the payload of the ES documents. Elasticsearch
> generates a document id for each record inserted. So each new insertion is
> considered as a new document. Users want to be able to update documents using
> the IO. So, for the write part of the IO, users should be able to provide a
> document id so that they could update already stored documents. Providing an
> id for the documents could also help the user on indempotency.
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