// Compound index covered query tests

var coll = db.getCollection("covered_compound_1")
coll.drop()
for (i=0;i<100;i++) {
    coll.insert({a:i, b:"strvar_"+(i%13), c:NumberInt(i%10)})
}
coll.ensureIndex({a:1,b:-1,c:1})

// Test equality - all indexed fields queried and projected
var plan = coll.find({a:10, b:"strvar_10", c:0}, {a:1, b:1, c:1, _id:0}).hint({a:1, b:-1, c:1}).explain()
assert.eq(true, plan.indexOnly, "compound.1.1 - indexOnly should be true on covered query")
assert.eq(0, plan.nscannedObjects, "compound.1.1 - nscannedObjects should be 0 for covered query")

// Test query on subset of fields queried and project all
var plan = coll.find({a:26, b:"strvar_0"}, {a:1, b:1, c:1, _id:0}).hint({a:1, b:-1, c:1}).explain()
assert.eq(true, plan.indexOnly, "compound.1.2 - indexOnly should be true on covered query")
assert.eq(0, plan.nscannedObjects, "compound.1.2 - nscannedObjects should be 0 for covered query")

// Test query on all fields queried and project subset
var plan = coll.find({a:38, b:"strvar_12", c: 8}, {b:1, c:1, _id:0}).hint({a:1, b:-1, c:1}).explain()
assert.eq(true, plan.indexOnly, "compound.1.3 - indexOnly should be true on covered query")
assert.eq(0, plan.nscannedObjects, "compound.1.3 - nscannedObjects should be 0 for covered query")

// Test no query
var plan = coll.find({}, {b:1, c:1, _id:0}).hint({a:1, b:-1, c:1}).explain()
assert.eq(true, plan.indexOnly, "compound.1.4 - indexOnly should be true on covered query")
assert.eq(0, plan.nscannedObjects, "compound.1.4 - nscannedObjects should be 0 for covered query")

// Test range query
var plan = coll.find({a:{$gt:25,$lt:43}}, {b:1, c:1, _id:0}).hint({a:1, b:-1, c:1}).explain()
assert.eq(true, plan.indexOnly, "compound.1.5 - indexOnly should be true on covered query")
assert.eq(0, plan.nscannedObjects, "compound.1.5 - nscannedObjects should be 0 for covered query")

// Test in query
var plan = coll.find({a:38, b:"strvar_12", c:{$in:[5,8]}}, {b:1, c:1, _id:0}).hint({a:1, b:-1, c:1}).explain()
assert.eq(true, plan.indexOnly, "compound.1.6 - indexOnly should be true on covered query")
assert.eq(0, plan.nscannedObjects, "compound.1.6 - nscannedObjects should be 0 for covered query")

// Test no result
var plan = coll.find({a:38, b:"strvar_12", c:55},{a:1, b:1, c:1, _id:0}).hint({a:1, b:-1, c:1}).explain()
assert.eq(true, plan.indexOnly, "compound.1.7 - indexOnly should be true on covered query")
assert.eq(0, plan.nscannedObjects, "compound.1.7 - nscannedObjects should be 0 for covered query")

print('all tests passed')
