37 lines
1.4 KiB
JavaScript
37 lines
1.4 KiB
JavaScript
// @tags: [
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// does_not_support_stepdowns,
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// ]
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/**
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* Tests that the explain output for $match reflects any optimizations.
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*/
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import {getAggPlanStage} from "jstests/libs/analyze_plan.js";
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const coll = db.match_explain;
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coll.drop();
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assert.commandWorked(coll.insert({a: 1, b: 1}));
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assert.commandWorked(coll.insert({a: 2, b: 3}));
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assert.commandWorked(coll.insert({a: 1, b: 2}));
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assert.commandWorked(coll.insert({a: 1, b: 4}));
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// Explain output should reflect optimizations.
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// $and should not be in the explain output because it is optimized out.
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let explain = coll.explain().aggregate(
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[{$sort: {b: -1}}, {$addFields: {c: {$mod: ["$a", 4]}}}, {$match: {$and: [{c: 1}]}}]);
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assert.commandWorked(explain);
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// Depending on whether the $match can be "pushed down" for SBE, the $match filter may appear in the
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// explain plan as a $match pipeline stage or as a MATCH plan stage.
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const documentSourceStage = getAggPlanStage(explain, "$match");
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const pushedDownFilterStage = getAggPlanStage(explain, "MATCH");
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assert(documentSourceStage || pushedDownFilterStage, explain);
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if (documentSourceStage) {
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assert(documentSourceStage.hasOwnProperty("$match"), documentSourceStage);
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assert.eq(documentSourceStage["$match"], {c: {$eq: 1}});
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} else {
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assert(pushedDownFilterStage.hasOwnProperty("filter"), pushedDownFilterStage);
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assert.eq(pushedDownFilterStage.filter, {c: {$eq: 1}});
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}
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