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From "Marten Feldtmann (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (COUCHDB-1797) Query against a view creates a questionable result
Date Sun, 19 May 2013 12:17:16 GMT

    [ https://issues.apache.org/jira/browse/COUCHDB-1797?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13661543#comment-13661543
] 

Marten Feldtmann commented on COUCHDB-1797:
-------------------------------------------

Hello Robert,

ok, what do I have:

(1) I have a task, which inserts documents - nothing else. The inserted documents do appear
in several views according to their attribute values

(2) I have another task, which queries a specific view to look for special documents imported
by task (1). The query of this task produces the errors I mentioned. (2) reads the documents
(queried against the view) and changes some attributes, updates the document which causes
the documents to disappear from this special view (used by (2)).

(3) I have another task, which looks for the documents changed by (2) in another specific
view. This task also produces some results, updates the documents. This task also produces
the view problems.

Documents are NEVER deleted in the database, but they might "travel" from one view to another
view by being updated by the application.

Actually I have never seen this problem before, because I emit the document itselfs as the
value in the view until I noticed, that this is stupid to do, because I get it by a different
view option and could use the value field for additional stuff.



                
> Query against a view creates a questionable result
> --------------------------------------------------
>
>                 Key: COUCHDB-1797
>                 URL: https://issues.apache.org/jira/browse/COUCHDB-1797
>             Project: CouchDB
>          Issue Type: Bug
>          Components: Database Core
>    Affects Versions: 1.3
>            Reporter: Marten Feldtmann
>
> I have a test system (CouchDB 1.3.0 under windows 7/64 Bit), where I insert lots of documents(100000)
to get a regular flow of new incoming documents.
> The database has also some views (25). Another task is reading documents from a view,
change some attributes and then the document should disappear from the view (and appear in
another view). Something like a state machine.
> I do the following query against a view:
> http://localhost:5984/test5/_design/ticketorggraphics/_view/waiting?limit=5&include_docs=true&include_end=true
> and get the following string:
> {"total_rows":9224,"offset":0,"rows":[
> {"id":"92224c2862ef49c15f3d51e3e7283cde","key":"ni13_1_2013101_20130518155518065","value":"ni13_2013101_VsPercentResult_83519204509647","doc":{"_id":"92224c2862ef49c15f3d51e3e7283cde","_rev":"1-6e8b57744c2b88f3d2dcad602e2e3353","distribution":"global","type":"ESTicketCreateOriginalGraphic","createdTS":"20130518155518065","priority":1,"eDayID":"ni13","electionID":2013101,"layout":"ard2013","baseDocKey":"ni13_2013101_VsPercentResult_83519204509647","_attachments":{"bclitemsdata":{"content_type":"application/zip","revpos":1,"digest":"md5-sdff2jkxp4w6xsSlx5Yzxw==","length":4533,"stub":true}}}},
> {"id":"92224c2862ef49c15f3d51e3e7285d38","key":"ni13_1_2013101_20130518155518135","value":"ni13_2013101_VsPercentResult_16771681663808","doc":{"_id":"92224c2862ef49c15f3d51e3e7285d38","_rev":"1-05b92282ec5f2d1b6d56912760792702","distribution":"global","type":"ESTicketCreateOriginalGraphic","createdTS":"20130518155518135","priority":1,"eDayID":"ni13","electionID":2013101,"layout":"ard2013","baseDocKey":"ni13_2013101_VsPercentResult_16771681663808","_attachments":{"bclitemsdata":{"content_type":"application/zip","revpos":1,"digest":"md5-sdff2jkxp4w6xsSlx5Yzxw==","length":4533,"stub":true}}}},
> {"id":"92224c2862ef49c15f3d51e3e728c5e2","key":"ni13_1_2013101_20130518155518413","value":"ni13_2013101_VsPercentResult_10619936276742","doc":null},
> {"id":"b02d128d88188d78ef7f3478586c349b","key":"ni13_2_2013101_20130518155203924","value":"ni13_2013101_VsPercentResult_46202583943140","doc":{"_id":"b02d128d88188d78ef7f3478586c349b","_rev":"1-bd2a2bfb1f7461e6b3ec6d4d106e08e4","distribution":"global","type":"ESTicketCreateOriginalGraphic","createdTS":"20130518155203924","priority":2,"eDayID":"ni13","electionID":2013101,"layout":"ard2013","baseDocKey":"ni13_2013101_VsPercentResult_46202583943140","_attachments":{"bclitemsdata":{"content_type":"application/zip","revpos":1,"digest":"md5-ErSTxuEaSHZrIJ276ANdOQ==","length":4533,"stub":true}}}},
> {"id":"b02d128d88188d78ef7f3478586c72a1","key":"ni13_2_2013101_20130518155204124","value":"ni13_2013101_VsPercentResult_91455901404013","doc":{"_id":"b02d128d88188d78ef7f3478586c72a1","_rev":"1-6f702cff1d12f992d745fc19be84b846","distribution":"global","type":"ESTicketCreateOriginalGraphic","createdTS":"20130518155204124","priority":2,"eDayID":"ni13","electionID":2013101,"layout":"ard2013","baseDocKey":"ni13_2013101_VsPercentResult_91455901404013","_attachments":{"bclitemsdata":{"content_type":"application/zip","revpos":1,"digest":"md5-L9UXpNNRUyk/LSlzAyEsXQ==","length":4533,"stub":true}}}}
> ]}
> Please notice, that the doc attribute of the third item in the rows attribute has the
value "null". That means, that the view entry has no belonging document ????????
> This seems to indicate an inconsistency within the database.
> I can not say, when this error happens, but I know, that it will happen in my test run.

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