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https://issues.apache.org/jira/browse/SOLR-1708?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12799184#action_12799184
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Simon Lachinger commented on SOLR-1708:
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Well, the solution with ${dih.request.root-pk} generates duplicate
configurations if users want to user full-import, delta-imports, and imports
with root-pk. And I doubt it will handle the last_index_time correctly. This
_kind_ of problems seems to be a pretty basic requirement actually. And all
workarounds I could google/think of required creating and maintaining
duplicates of the import queries. Which is quite bad.
I guess it would be better to have an additional command to allow these actions?
> Allowing import / update of a specific document using the data import handler
> -----------------------------------------------------------------------------
>
> Key: SOLR-1708
> URL: https://issues.apache.org/jira/browse/SOLR-1708
> Project: Solr
> Issue Type: New Feature
> Components: contrib - DataImportHandler
> Affects Versions: 1.4
> Reporter: Simon Lachinger
> Attachments: 02-single-update.patch, 02-single-update.patch
>
>
> There is the need that changes or new documents need to be added immediately
> to the Solr Index. This could easily done via the update-handler - however,
> when using the DataImportHandler it shouldn't be necessary to specify the
> data extraction for the the DataImportHandler and also for feeding it to into
> the update-handler. It should be centralized.
> Having to run delta query, identifying the changes, for changes where the
> ID's of the updated documents are already known to the application is a
> rather costly (in terms of database load) way to solve this.
> The attached patch allows to specify one or more query parameters for the
> delta-import command, named 'root-pk', which allow to specify the document(s)
> to be updated or added.
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