[jira] [Commented] (SOLR-2974) CSVResponseWriter: configurable NULL placeholder value

["Yonik Seeley (Commented) (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SOLR-2974?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13171179#comment-13171179 ] 

Yonik Seeley commented on SOLR-2974:
------------------------------------

This may only be needed for text/string fields.  A zero length string as a value for numerics and booleans is unambiguously "missing".

Related: the CSV loader drops zero length entries by default.
http://wiki.apache.org/solr/UpdateCSV#keepEmpty

                
> CSVResponseWriter: configurable NULL placeholder value
> ------------------------------------------------------
>
>                 Key: SOLR-2974
>                 URL: https://issues.apache.org/jira/browse/SOLR-2974
>             Project: Solr
>          Issue Type: Improvement
>          Components: Response Writers
>            Reporter: Jan Høydahl
>
> We need a config parameter to specify a placeholder value for NULL/missing values as opposed to explicit empty string.
> (Spinoff from SOLR-2970)

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