30a7024ffa
- Change PlanExplainerImpl::getWinningPlanStats to not cut off the nodes on top of the MultiPlanStage. - Adapt all functions that process a tree of PlanStage or PlanStageStats for the purpose of Explain to skip the MultiPlan node, and jump to process its best plan child. - Pass the index of the multi-plan sub-plan that should be printed to various functions that print or linearize plans.
44 lines
1.4 KiB
JavaScript
44 lines
1.4 KiB
JavaScript
// Tests that in the case of multiple plans, the plan node above the MutliPlanStage is printed
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// correctly both as part of the winning, and rejected plans.
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//
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// This test is not prepared to handle explain output for sharded collections or when executed
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// against a mongos.
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// @tags: [
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// requires_fcv_49,
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// assumes_unsharded_collection,
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// assumes_against_mongod_not_mongos,
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// ]
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(function() {
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"use strict";
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load("jstests/libs/analyze_plan.js");
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const coll = db.explain_multi_plan_count;
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coll.drop();
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// Create two indexes to ensure that the best plan will be picked by the multi-planner.
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assert.commandWorked(coll.createIndex({a: 1}));
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assert.commandWorked(coll.createIndex({a: 1, b: 1}));
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assert.commandWorked(coll.createIndex({a: 1, c: 1}));
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assert.commandWorked(coll.insert([{a: 0}, {a: 1}, {a: 2}, {a: 3}]));
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const explain =
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coll.explain("allPlansExecution").find({a: {$in: [1, 3]}, b: {$in: [1, 3]}}).count();
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// Check that all plans, both winning and rejected have a structure that excludes the MultiPlanNode
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// and continues with the correct plan child below COUNT.
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assertExplainCount({explainResults: explain, expectedCount: 0});
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isIndexOnly(db, getWinningPlan(explain.queryPlanner));
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const rejectedPlans = getRejectedPlans(explain);
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for (let curRejectedPlan of rejectedPlans) {
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const rejectedPlan = getRejectedPlan(curRejectedPlan);
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assert.eq(rejectedPlan.stage, "COUNT");
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isIxscan(db, rejectedPlan);
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}
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assert(coll.drop());
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}());
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