Count behaviour with a bad hint is inconsistent

XMLWordPrintableJSON

    • Type: Bug
    • Resolution: Duplicate
    • Priority: Minor - P4
    • None
    • Affects Version/s: 2.6.4
    • Component/s: Querying
    • None
    • ALL
    • Hide 
      collection = db.jstests_count_hint;
collection.drop();

assert.throws( function() { collection.find( { i: 1 } ).hint( "BAD HINT" ).count(); }, [], "A");
assert.throws( function() { collection.find().hint( "BAD HINT" ).count(); }, [], "B");

collection.save({i: 1});
assert.throws( function() { collection.find({ i: 1 }).hint( "BAD HINT" ).count(); }, [], "C");
      Show
      collection = db.jstests_count_hint; collection.drop(); assert . throws ( function() { collection.find( { i: 1 } ).hint( "BAD HINT" ).count(); }, [], "A" ); assert . throws ( function() { collection.find().hint( "BAD HINT" ).count(); }, [], "B" ); collection.save({i: 1}); assert . throws ( function() { collection.find({ i: 1 }).hint( "BAD HINT" ).count(); }, [], "C" );
    • None
    • 3
    • None
    • None
    • None
    • None
    • None
    • None

      Running a count with an invalid hint may or may not error.

      1. If there are no documents in the collection it won't error
      2. If there are documents but no filter it won't error
      3. If there are documents and a filter it will error

      collection = db.jstests_count_hint;
collection.drop();

assert.throws( function() { collection.find( { i: 1 } ).hint( "BAD HINT" ).count(); }, [], "A");
assert.throws( function() { collection.find().hint( "BAD HINT" ).count(); }, [], "B");

collection.save({i: 1});
assert.throws( function() { collection.find({ i: 1 }).hint( "BAD HINT" ).count(); }, [], "C");

      Only "C" will error.

            Assignee:
            Ramon Fernandez Marina
            Reporter:
            Ross Lawley
            Votes:
            0 Vote for this issue
            Watchers:
            3 Start watching this issue

              Created:
              Updated:
              Resolved: