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  1. Core Server
  2. SERVER-16783

Indexes not updated when types change but values compare equally

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Details

    • Bug
    • Status: Closed
    • Major - P3
    • Resolution: Gone away
    • None
    • None
    • None
    • ALL

    Description

      The AccessMethod code above the indexes groups values into added, removed, and unchanged based on value comparisons. Since this doesn't consider types, all values where only the type changed are considered "unchanged" and the index is not notified of the change.

      > db.foo.insert({_id:1, a:1})
      WriteResult({ "nInserted" : 1 })
      > db.foo.ensureIndex({a:1})
      {
              "createdCollectionAutomatically" : false,
              "numIndexesBefore" : 1,
              "numIndexesAfter" : 2,
              "ok" : 1
      }
      > db.foo.find({a:1}, {a:1, _id:0})
      { "a" : 1 }
      > db.foo.save({_id:1, a: NumberLong(1)})
      WriteResult({ "nMatched" : 1, "nUpserted" : 0, "nModified" : 1 })
      > db.foo.find({a:1}, {a:1, _id:0})
      { "a" : 1 }
      > db.foo.find({a:1}, {a:1, _id:0}).hint({$natural: 1})
      { "a" : NumberLong(1) }
      

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              backlog-server-execution Backlog - Storage Execution Team
              mathias@mongodb.com Mathias Stearn
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                Updated:
                Resolved: