56 lines
2.1 KiB
JavaScript
56 lines
2.1 KiB
JavaScript
/**
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* Tests that the queryExecutor stats are correctly returned when $unionWith is performed on
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* collections.
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*
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* @tags: [
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* assumes_unsharded_collection,
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* do_not_wrap_aggregations_in_facets,
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* assumes_read_preference_unchanged,
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* assumes_read_concern_unchanged,
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* assumes_against_mongod_not_mongos,
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* does_not_support_repeated_reads,
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* # Multi clients run concurrently and may modify the serverStatus metrices read in this test.
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* multi_clients_incompatible,
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* ]
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*/
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const testDB = db.getSiblingDB("union_with_query_stats");
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testDB.dropDatabase();
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const collData = [
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["firstCol", Array.from({length: 10}, (_, i) => ({_id: i, "aField": i}))],
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["secondColl", Array.from({length: 20}, (_, i) => ({_id: i, "aField": i}))],
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["thirdColl", Array.from({length: 30}, (_, i) => ({_id: i, "aField": i}))],
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["forthColl", Array.from({length: 40}, (_, i) => ({_id: i, "aField": i}))],
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];
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const colls = Array.from(collData, (elem) => testDB.getCollection(elem[0]));
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for (let idx = 0; idx < collData.length; idx++) {
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const coll = colls[idx];
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const collDocs = collData[idx][1];
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assert.commandWorked(coll.insert(collDocs));
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}
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(function testUnionWithQueryStats() {
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// Collect the previous scannedObjects before running aggregation. This value will be
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// subtracted from the current scannedObjects and will prevent test case from failing if it is
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// run on existing mongoD instance.
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const prevScannedObjects = testDB.serverStatus().metrics.queryExecutor.scannedObjects;
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const pipeline = [
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{$unionWith: {coll: collData[1][0]}},
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{$unionWith: {coll: collData[2][0], pipeline: [{$unionWith: {coll: collData[3][0]}}]}},
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{$sort: {_id: 1}},
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];
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const output = colls[0].aggregate(pipeline).toArray();
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// Concatenate and sort arrays by '_id'.
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let expectedOutput = []
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.concat(collData[0][1], collData[1][1], collData[2][1], collData[3][1])
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.sort((elem1, elem2) => elem1._id - elem2._id);
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assert.eq(output, expectedOutput);
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assert.eq(expectedOutput.length, testDB.serverStatus().metrics.queryExecutor.scannedObjects - prevScannedObjects);
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})();
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