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/**
* Tests that the cluster cannot be downgraded when there are indexes with the
* 'disallowNewDuplicateKeys' field present.
*
* TODO SERVER-63564: Remove this test once kLastLTS is 6.0.
*
* @tags: [requires_fcv_53]
*/
(function() {
"use strict";
const conn = MongoRunner.runMongod();
const db = conn.getDB("test");
const collModIndexUniqueEnabled = assert
.commandWorked(db.getMongo().adminCommand(
{getParameter: 1, featureFlagCollModIndexUnique: 1}))
.featureFlagCollModIndexUnique.value;
if (!collModIndexUniqueEnabled) {
jsTestLog('Skipping test because the collMod unique index feature flag is disabled.');
MongoRunner.stopMongod(conn);
return;
}
const collName = "index_disallowNewDuplicateKeys_downgrade";
const coll = db.getCollection(collName);
assert.commandWorked(db.createCollection(coll.getName()));
function checkIndexForDowngrade(withFCV, fixIndex, isCompatible) {
assert.commandWorked(coll.createIndex({a: 1}, {disallowNewDuplicateKeys: true}));
assert.commandWorked(coll.createIndex({b: 1}, {disallowNewDuplicateKeys: true}));
if (fixIndex) {
// Resolves the incompatibility before the downgrade.
assert.commandWorked(coll.dropIndex({a: 1}));
assert.commandWorked(db.runCommand(
{collMod: collName, index: {keyPattern: {b: 1}, disallowNewDuplicateKeys: false}}));
} else if (!isCompatible) {
assert.commandFailedWithCode(db.adminCommand({setFeatureCompatibilityVersion: withFCV}),
ErrorCodes.CannotDowngrade);
assert.commandWorked(coll.dropIndexes("*"));
}
// Downgrades to the version 'withFCV' and reset to 'latestFCV'.
assert.commandWorked(db.adminCommand({setFeatureCompatibilityVersion: withFCV}));
assert.commandWorked(db.adminCommand({setFeatureCompatibilityVersion: latestFCV}));
assert.commandWorked(coll.dropIndexes("*"));
}
// Fails to downgrade to 5.2.
checkIndexForDowngrade(lastContinuousFCV, false, false);
// Fails to downgrade to 5.0.
checkIndexForDowngrade(lastLTSFCV, false, false);
// Successfully downgrades to 5.2 after removing the 'disallowNewDuplicateKeys' field.
checkIndexForDowngrade(lastContinuousFCV, true, true);
// Successfully downgrades to 5.0 after removing the 'disallowNewDuplicateKeys' field.
checkIndexForDowngrade(lastLTSFCV, true, true);
MongoRunner.stopMongod(conn);
}());
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