jstests/core/index_type_change.js


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42

// Cannot implicitly shard accessed collections because of following errmsg: A single
// update/delete on a sharded collection must contain an exact match on _id or contain the shard
// key.
// @tags: [assumes_unsharded_collection]

/**
 * Tests that replacing a document with an equivalent document with different types for the fields
 * will update the index entries associated with that document.
 */

load("jstests/libs/analyze_plan.js");  // For 'isIndexOnly'.

(function() {
"use strict";

var coll = db.index_type_change;
coll.drop();
assert.commandWorked(coll.ensureIndex({a: 1}));

assert.writeOK(coll.insert({a: 2}));
assert.eq(1, coll.find({a: {$type: "double"}}).itcount());

var newVal = new NumberLong(2);
var res = coll.update({}, {a: newVal});  // Replacement update.
assert.writeOK(res);
assert.eq(res.nMatched, 1);
if (coll.getMongo().writeMode() == "commands")
    assert.eq(res.nModified, 1);

// Make sure it actually changed the type.
assert.eq(1, coll.find({a: {$type: "long"}}).itcount());

// Now use a covered query to ensure the index entry has been updated.

// First make sure it's actually using a covered index scan.
var explain = coll.explain().find({a: 2}, {_id: 0, a: 1});
assert(isIndexOnly(db, explain));

var updated = coll.findOne({a: 2}, {_id: 0, a: 1});

assert(updated.a instanceof NumberLong, "Index entry did not change type");
})();