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/**
* Tests that we cannot downgrade FCV when we have partial indexes with $or/$in/$geoWithin.
*/
(function() {
'use strict';
const dbpath = MongoRunner.dataPath + 'partial_indexes_downgrade';
resetDbpath(dbpath);
// Start with 6.0, create a partial index with an $or, then make sure we fail to downgrade FCV
// to 5.0. Drop the index, then actually downgrade to 5.0.
{
const conn =
MongoRunner.runMongod({dbpath: dbpath, binVersion: 'latest', noCleanData: true});
const db = conn.getDB('test');
const coll = db['partial_indexes_downgrade'];
assert.commandWorked(coll.createIndex(
{a: 1, b: 1}, {partialFilterExpression: {$or: [{a: {$lt: 20}}, {b: {$lt: 10}}]}}));
coll.insert({a: 1, b: 1});
coll.insert({a: 30, b: 20});
assert.commandFailedWithCode(db.adminCommand({setFeatureCompatibilityVersion: lastLTSFCV}),
ErrorCodes.CannotDowngrade);
coll.dropIndexes();
assert.commandWorked(db.adminCommand({setFeatureCompatibilityVersion: lastLTSFCV}));
MongoRunner.stopMongod(conn);
}
// Startup with 5.0 binary, with FCV set to 5.0.
{
const conn = MongoRunner.runMongod({dbpath: dbpath, binVersion: lastLTSFCV, noCleanData: true});
const db = conn.getDB('test');
const coll = db['partial_indexes_downgrade'];
// Make sure we are on the same db path as before.
assert.eq(coll.aggregate().toArray().length, 2);
MongoRunner.stopMongod(conn);
}
})();
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