SERVER-5063 $in on first compound key element and limit efficiency

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• Closed

SERVER-959 never do a table scan to answer db.f.find( {y:10} ).sort( {x:1} ) when have index {x:1,y:1}

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• Closed

SERVER-10472 find(a).sort(b,_id) doesn't use index(a,b) to minimize scans

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• Backlog

SERVER-2148 $in with sort doesnt use index

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• Closed

SERVER-5032 unnecessarily large nScanned occurs during sharded $in queries with sort() and limit()

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• Closed