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https://issues.apache.org/jira/browse/SOLR-801?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12638441#action_12638441
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Hoss Man commented on SOLR-801:
-------------------------------

perhaps a preFullBuildDeleteQuery and a postFullBuildDeleteQuery ... somepeople 
might want to delete all existing entities before starting a full build -- 
others might want to wait until after the full build to delete old stuff 
(anything that hasn't been updated in since NOW-1DAY for example)

> configurable delete query  per root-entity
> ------------------------------------------
>
>                 Key: SOLR-801
>                 URL: https://issues.apache.org/jira/browse/SOLR-801
>             Project: Solr
>          Issue Type: New Feature
>          Components: contrib - DataImportHandler
>    Affects Versions: 1.3
>            Reporter: Noble Paul
>             Fix For: 1.4
>
>
> Now on a full import DIH deletes *:* which is a problem if I have different 
> root entities .
> Suggest having a deleteByQuery attribute for each root entity so that cleanup 
> can issue a different query instead of *:*

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