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https://issues.apache.org/jira/browse/SOLR-2731?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13091187#comment-13091187
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Simon Rosenthal commented on SOLR-2731:
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In addition to loading CSV results into a spreadsheet, I often use CSV as a
quick-and-dirty way of dumping the contents of an index to be re-read into
Solr, and adding lines which would need manual removal would be rather
inconvenient.
I'd go for option 4, with the comment symbol and result metadata on one line.
org.apache.commons.csv has an option (which is not currently enabled in the
CSVRequestHandler) to recognize and discard comment lines - adding a request
parameter to the handler to recognize comment lines would be straightforward,
and would at least solve my use case, though I admit not all others.
> CSVResponseWriter should optionally return numfound
> ---------------------------------------------------
>
> Key: SOLR-2731
> URL: https://issues.apache.org/jira/browse/SOLR-2731
> Project: Solr
> Issue Type: Improvement
> Components: Response Writers
> Affects Versions: 3.1, 3.3, 4.0
> Reporter: Jon Hoffman
> Labels: patch
> Fix For: 3.1.1, 3.3, 4.0
>
> Attachments: SOLR-2731.patch
>
> Original Estimate: 1h
> Remaining Estimate: 1h
>
> an optional parameter "csv.numfound=true" can be added to the request which
> causes the first line of the response to be the numfound. This would have no
> impact on existing behavior, and those who are interested in that value can
> simply read off the first line before sending to their usual csv parser.
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