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73 lines
2.3 KiB
JavaScript
73 lines
2.3 KiB
JavaScript
/**
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* Tests that we generate DISTINCT_SCANs just for eligible indexes.
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*
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* @tags: [
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* featureFlagShardFilteringDistinctScan,
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* ]
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*/
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import {
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outputAggregationPlanAndResults,
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outputDistinctPlanAndResults,
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section,
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subSection
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} from "jstests/libs/pretty_md.js";
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const coll = db[jsTestName()];
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section("Distinct Field part of the Index Key Pattern");
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subSection("flip && multikey => no DISTINCT_SCAN");
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coll.drop();
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coll.insert({a: [1, 2, 3], b: 5});
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coll.createIndex({a: 1, b: 1});
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outputAggregationPlanAndResults(
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coll, [{$sort: {a: 1, b: 1}}, {$group: {_id: "$a", accum: {$last: "$b"}}}]);
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subSection("flip && !multikey => DISTINCT_SCAN");
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coll.drop();
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coll.insert({a: 1, b: 5});
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coll.createIndex({a: 1, b: 1});
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outputAggregationPlanAndResults(
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coll, [{$sort: {a: 1, b: 1}}, {$group: {_id: "$a", accum: {$last: "$b"}}}]);
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subSection("!flip && strict && multikey on distinct field => no DISTINCT_SCAN");
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coll.drop();
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coll.insert({a: [1, 2, 3], b: 5});
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coll.createIndex({a: 1, b: 1});
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outputAggregationPlanAndResults(
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coll, [{$group: {_id: "$a", accum: {$top: {output: "$b", sortBy: {a: 1, b: 1}}}}}]);
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subSection(
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"!flip && strict && the index is only multikey on the non-distinct field => DISTINCT_SCAN");
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coll.drop();
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coll.insert({a: 1, b: [1, 2, 3]});
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coll.createIndex({a: 1, b: 1});
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outputAggregationPlanAndResults(
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coll, [{$group: {_id: "$a", accum: {$top: {output: "$b", sortBy: {a: 1, b: 1}}}}}]);
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subSection("!flip && !strict && !multikey on distinct field => DISTINCT_SCAN");
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coll.drop();
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coll.insert({a: 1, b: [1, 2, 3]});
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coll.createIndex({a: 1, b: 1});
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outputDistinctPlanAndResults(coll, "a", {a: {$gt: 3}});
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section("Distinct Field not part of the Index Key Pattern");
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subSection("wildcard && covered projection => DISTINCT_SCAN");
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coll.drop();
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coll.insertMany([{a: 1}, {a: 2}, {a: "3"}, {b: 5}, {b: 7}]);
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coll.createIndex({"$**": 1});
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outputDistinctPlanAndResults(coll, "a", {a: {$lt: 3}});
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subSection("!wildcard => no DISTINCT_SCAN");
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coll.drop();
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coll.insertMany([{a: 1}, {a: 2}, {a: "3"}, {b: 5}, {b: 7}]);
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coll.createIndex({b: 1});
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outputDistinctPlanAndResults(coll, "a", {a: {$lt: 3}});
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subSection("wildcard && !covered projection => no DISTINCT_SCAN");
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coll.drop();
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coll.insertMany([{a: 1}, {a: 2}, {a: "3"}, {a: 4, b: 3}, {b: 7}]);
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coll.createIndex({"$**": 1});
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outputDistinctPlanAndResults(coll, "a", {b: {$lt: 5}});
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