33 lines
989 B
JavaScript
33 lines
989 B
JavaScript
/**
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* Test that when $setWindowFields requires metadata, it does not take the express path
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* even if the desugared query would otherwise be eligible.
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* @tags: [requires_fcv_82]
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*/
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import {getQueryPlanner, planHasStage} from "jstests/libs/query/analyze_plan.js";
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const coll = db[jsTestName()];
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coll.drop();
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const documents = [{
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_id: 31,
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date: 2,
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}];
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assert.commandWorked(coll.insert(documents));
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// We need a sort key, but the point _id query would normally take the express path.
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let q = [
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{"$match": {"_id": 31}},
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{
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"$setWindowFields":
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{"sortBy": {"date": 1}, "partitionBy": "$array", "output": {"x": {"$denseRank": {}}}}
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}
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];
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// This query should return one successfully ranked document.
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let result = coll.aggregate(q).toArray();
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assert.eq(result, [{_id: 31, date: 2, x: 1}]);
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let explain = coll.explain().aggregate(q);
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let planner = getQueryPlanner(explain);
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assert(planHasStage(db, planner.winningPlan, "SORT_KEY_GENERATOR"), planner);
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