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Date: Wed, 17 Feb 2010 07:04:28 +0000 (UTC)
From: "Filipe Manana (JIRA)" <jira@apache.org>
To: dev@couchdb.apache.org
Subject: [jira] Commented: (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:comment-tabpanel&focusedCommentId=12834669#action_12834669 ] 

Filipe Manana commented on COUCHDB-640:
---------------------------------------

Funny, there seems to be a time issue with Jira. My last comment/upload is dated as before the previous one from yesterday.

> 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
>         Attachments: couchdb-640-trunk-2.patch, 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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