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From "Paul Joseph Davis (JIRA)" <j...@apache.org>
Subject [jira] Updated: (COUCHDB-640) Detect when a view is not valid for a database
Date Fri, 05 Feb 2010 22:56:27 GMT

     [ https://issues.apache.org/jira/browse/COUCHDB-640?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Paul Joseph Davis updated COUCHDB-640:
--------------------------------------

          Component/s: JavaScript View Server
          Description: 
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
    Affects Version/s: 0.11
              Summary: Detect when a view is not valid for a database  (was: Detect when a
view)

> 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
>
> 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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