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Date: Thu, 18 Feb 2010 20:06:28 +0000 (UTC)
From: "Paul Joseph Davis (JIRA)" <jira@apache.org>
To: dev@couchdb.apache.org
Subject: [jira] Resolved: (COUCHDB-640) Detect when a view is not valid for
 a database
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     [ https://issues.apache.org/jira/browse/COUCHDB-640?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Paul Joseph Davis resolved COUCHDB-640.
---------------------------------------

    Resolution: Fixed
      Assignee: Paul Joseph Davis

And closed

> Detect when a view is not valid for a database
> ----------------------------------------------
>
>                 Key: COUCHDB-640
>                 URL: https://issues.apache.org/jira/browse/COUCHDB-640
>             Project: CouchDB
>          Issue Type: Bug
>          Components: JavaScript View Server
>    Affects Versions: 0.11
>            Reporter: Paul Joseph Davis
>            Assignee: Paul Joseph Davis
>         Attachments: couchdb-640-trunk-3.patch, couchdb-640-trunk.patch
>
>
> It was mentioned on IRC that if someone restores a database without restoring a view then there's nothing that detects if the view is still valid. Ie, it may reflect an update_seq that the restoration lost.
> In the check for kicking off a view update we should check if there is an incompatibility between what's been calculated in the view vs what the db update sequence is at. The current logic will just ignore and return the invalid view data (because of how stale=ok works which is good).
> Should be an easy bug to fix if anyone's interested. The code should be pretty contained to couch_view.erl and couch_view_group.erl

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