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t = db.mr_index2;
t.drop()
t.save( { arr : [1, 2] } )
map = function() { emit(this._id, 1) }
reduce = function(k,vals) { return Array.sum( vals ); }
res = t.mapReduce(map,reduce, { out : "mr_index2_out" , query : {} })
assert.eq( 1 ,res.counts.input , "A" )
res.drop()
res = t.mapReduce(map,reduce, { out : "mr_index2_out" , query : { arr: {$gte:0} } })
assert.eq( 1 ,res.counts.input , "B" )
res.drop()
t.ensureIndex({arr:1})
res = t.mapReduce(map,reduce, { out : "mr_index2_out" , query : { arr: {$gte:0} } })
assert.eq( 1 ,res.counts.input , "C" )
res.drop();
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