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  1. CouchDB
  2. COUCHDB-2900

CouchDB 2.0: raw collation order is not respected when a database has multiple shards

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      In CouchDB 1.X, specifying raw collation in a view definition changes the result order:

      $ curl http://localhost:5984/nullsort -XPUT
      {"ok":true}
      
      $ curl http://localhost:5984/nullsort/_bulk_docs -XPOST -H'Content-Type:application/json' -d '{"docs":[{"test":1},{"test":null}]}'
      [{"ok":true,"id":"a9f86d3c33d25c15de6eca8578001d98","rev":"1-ea7a185b492abc69a6c8e0358d244a98"},{"ok":true,"id":"a9f86d3c33d25c15de6eca8578002c25","rev":"1-9b2a5b981a9dd0ad1b3a3e826498e9bb"}]
      
      $ curl http://localhost:5984/nullsort -XPOST -H'Content-Type:application/json' -d '{"_id": "_design/test","views":{"nullsort":{"map": "function (doc) {emit(doc.test, 1);}","options":{"collation": "raw"}}}}'
      {"ok":true,"id":"_design/test","rev":"1-2df3ab52426a7138b6898791024595d0"}
      
      $ curl http://localhost:5984/nullsort/_design/test/_view/nullsort
      {"total_rows":2,"offset":0,"rows":[
      {"id":"a9f86d3c33d25c15de6eca8578001d98","key":1,"value":1},
      {"id":"a9f86d3c33d25c15de6eca8578002c25","key":null,"value":1}
      ]}
      

      In CouchDB 2.0, with n=1, q=4:

      $ curl http://localhost:15984/nullsort -XPUT
      {"ok":true}
      
      $ curl http://localhost:15984/nullsort/_bulk_docs -XPOST -H'Content-Type:application/json' -d '{"docs":[{"test":1},{"test":null}]}'
      [{"ok":true,"id":"51cf4c5a56f86f524b0e36f52800029d","rev":"1-ea7a185b492abc69a6c8e0358d244a98"},{"ok":true,"id":"51cf4c5a56f86f524b0e36f528000d9c","rev":"1-9b2a5b981a9dd0ad1b3a3e826498e9bb"}]
      
      $ curl http://localhost:15984/nullsort -XPOST -H'Content-Type:application/json' -d '{"_id": "_design/test","views":{"nullsort":{"map": "function (doc) {emit(doc.test, 1);}","options":{"collation": "raw"}}}}'
      {"ok":true,"id":"_design/test","rev":"1-2df3ab52426a7138b6898791024595d0"}
      
      $ curl http://localhost:15984/nullsort/_design/test/_view/nullsort
      {"total_rows":2,"offset":0,"rows":[
      {"id":"51cf4c5a56f86f524b0e36f528000d9c","key":null,"value":1},
      {"id":"51cf4c5a56f86f524b0e36f52800029d","key":1,"value":1}
      ]}
      

      Note that null is returned before 1.

      If q=1, the ordering matches CouchDB 1.X

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              • Assignee:
                Unassigned
                Reporter:
                wilhol Will Holley
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                • Created:
                  Updated:
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