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https://issues.apache.org/jira/browse/COUCHDB-576?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13466766#comment-13466766
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Robert Newson commented on COUCHDB-576:
---------------------------------------

The most common way of accidentally deleting a db when you meant to delete a 
document is when you form the URL but your doc id is an empty string. This is 
why CouchDB refuses to delete a db if you have a 'rev' parameter.

Cloudant does not immediately delete database files, they're moved to a 
"deleted" directory and are only really deleted once 24 hours have passed.
                
> Require current update_seq when deleting a database for extra safety.
> ---------------------------------------------------------------------
>
>                 Key: COUCHDB-576
>                 URL: https://issues.apache.org/jira/browse/COUCHDB-576
>             Project: CouchDB
>          Issue Type: Improvement
>          Components: Database Core
>            Reporter: Robert Newson
>         Attachments: delete-db-safety-with-tests.patch
>
>
> Require the current update_seq before deleting a database to prevent 
> accidental deletion.
> DELETE /db2?seq=12

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