//1.创建函数
function f_getfield(coll_name)
{
mr = db.runCommand({
"mapreduce": coll_name,
"map": function()
{
for (var key in this)
{
emit(key, null);
}
},
"reduce": function(key, stuff)
{
return null;
},
"out": coll_name + "_keys"
});
//2.执行函数
var v_coll_name='c01';
f_getfield(v_coll_name);
