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  1. Core Server
  2. SERVER-31876

$ne has inconsistent behavior

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Details

    • Bug
    • Status: Closed
    • Major - P3
    • Resolution: Works as Designed
    • 3.4.9
    • None
    • Querying
    • None
    • Query
    • ALL
    • Hide 

      >db.inventory.insertMany([
      		 
      { "a" : [ ] },
      		 
      { "a" : [ {}] },
      		 
      { "a" : [ { "b" : 1}, { "d" : 1 } ] }
      		 
      ])
      		 
      >db.inventory.find({'a.b':{$ne:null}})
      		 
      >db.inventory.find({'a.b':{$elemMatch:{$ne:null}}})

      Show
      >db.inventory.insertMany([ { "a" : [ ] }, { "a" : [ {}] }, { "a" : [ { "b" : 1}, { "d" : 1 } ] } ]) >db.inventory.find({ 'a.b' :{$ne: null }}) >db.inventory.find({ 'a.b' :{$elemMatch:{$ne: null }}})

    Description

      `$ne` has very inconsistent behavior when used with arrays. This behavior also differs when using `$elemMatch`, while the `$elemMatch` docs state that with one query, the results should be identical.

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        Issue Links

          is related to

          Task - A task that needs to be done. SERVER-36681 Change {$ne: null} semantics to be more intuitive

          • Major - P3 - Major loss of function.
          • Backlog
          related to

          Bug - A problem which impairs or prevents the functions of the product. SERVER-27442 Positional path component in match language should not act as both an array index and a field name for a single document

          • Major - P3 - Major loss of function.
          • Backlog

          Bug - A problem which impairs or prevents the functions of the product. SERVER-1937 $gt/$lt/$ne with scalar operand yields inconsistent matches on arrays

          • Major - P3 - Major loss of function.
          • Closed

          Activity

            People

              backlog-server-query Backlog - Query Team (Inactive)
              jjaco16 Johnny
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              Dates

                Created:
                Updated:
                Resolved: