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https://issues.apache.org/jira/browse/SOLR-6034?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13985123#comment-13985123
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Alexandre Rafalovitch commented on SOLR-6034:
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I don't think this issue is a DataImportHandler component. Though I am not sure
which component this should be.
> Use a wildcard in order to delete fields with Atomic Update
> -----------------------------------------------------------
>
> Key: SOLR-6034
> URL: https://issues.apache.org/jira/browse/SOLR-6034
> Project: Solr
> Issue Type: Improvement
> Components: contrib - DataImportHandler
> Affects Versions: 4.7
> Reporter: Constantin Muraru
>
> As discussed on the SOLR user group, it would a great feature to be able to
> remove all fields matching a pattern, using Atomic Updates.
> Example:
> <add><doc>
> <field name="id">100</field>
> <field name="*_day_i" update="set" null="true"></field>
> </doc></add>
> The *_day_i should be expanded server-side and all fields matching this
> pattern should be removed from the specified document.
> Workaround: When removing fields from a document, we can make a query to SOLR
> from the client, in order to see what fields are actually present for the
> specific document. After that, we can create the XML update document to be
> sent to SOLR. However, this is going to increase the number of queries to
> SOLR and for large amount of documents this is going to weigh pretty much. It
> would be great performance-wise and simplicity-wise to be able to provide
> wildcards.
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