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/**
* Tests that we can create background (and foreground) indexes that are multikey.
* @tags: [
* # Uses index building in background
* requires_background_index,
* ]
*/
(function() {
"use strict";
function testIndexBuilds(isBackground) {
jsTestLog("Testing " + (isBackground ? "background" : "foreground") + " index builds");
let coll = db["background_index_multikey_" + isBackground];
coll.drop();
// Build index after multikey document is in the collection.
let doc = {_id: 0, a: [1, 2]};
assert.writeOK(coll.insert(doc));
assert.commandWorked(coll.createIndex({a: 1}, {background: isBackground}));
assert.eq(1, coll.count({a: 1}));
assert.eq(doc, coll.findOne({a: 1}));
assert.eq(1, coll.count({a: 2}));
assert.eq(doc, coll.findOne({a: 2}));
// Build index where multikey is in an embedded document.
doc = {_id: 1, b: {c: [1, 2]}};
assert.writeOK(coll.insert(doc));
assert.commandWorked(coll.createIndex({'b.c': 1}, {background: isBackground}));
assert.eq(1, coll.count({'b.c': 1}));
assert.eq(doc, coll.findOne({'b.c': 1}));
assert.eq(1, coll.count({'b.c': 2}));
assert.eq(doc, coll.findOne({'b.c': 2}));
// Add new multikey path to embedded path.
doc = {_id: 2, b: [1, 2]};
assert.writeOK(coll.insert(doc));
assert.eq(1, coll.count({b: 1}));
assert.eq(doc, coll.findOne({b: 1}));
assert.eq(1, coll.count({b: 2}));
assert.eq(doc, coll.findOne({b: 2}));
// Build index on a large collection that is not multikey, and then make it multikey.
for (let i = 100; i < 1100; i++) {
assert.writeOK(coll.insert({_id: i, d: i}));
}
assert.commandWorked(coll.createIndex({d: 1}, {background: isBackground}));
doc = {_id: 3, d: [1, 2]};
assert.writeOK(coll.insert(doc));
assert.eq(1, coll.count({d: 1}));
assert.eq(doc, coll.findOne({d: 1}));
assert.eq(1, coll.count({d: 2}));
assert.eq(doc, coll.findOne({d: 2}));
// Build compound multikey index.
doc = {_id: 4, e: [1, 2]};
assert.writeOK(coll.insert(doc));
assert.commandWorked(coll.createIndex({'e': 1, 'f': 1}, {background: isBackground}));
assert.eq(1, coll.count({e: 1}));
assert.eq(doc, coll.findOne({e: 1}));
assert.eq(1, coll.count({e: 2}));
assert.eq(doc, coll.findOne({e: 2}));
// Add new multikey path to compound index.
doc = {_id: 5, f: [1, 2]};
assert.writeOK(coll.insert(doc));
assert.eq(1, coll.count({f: 1}));
assert.eq(doc, coll.findOne({f: 1}));
assert.eq(1, coll.count({f: 2}));
assert.eq(doc, coll.findOne({f: 2}));
}
testIndexBuilds(false);
testIndexBuilds(true);
})();
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