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98 lines
3.0 KiB
JavaScript
98 lines
3.0 KiB
JavaScript
/**
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* Tests that the distinct command will go through the process of multiplanning.
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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 {outputDistinctPlanAndResults, section} from "jstests/libs/pretty_md.js";
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const coll = db[jsTestName()];
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section("No DISTINCT_SCAN candidate considered");
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coll.drop();
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coll.createIndex({x: 1});
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coll.createIndex({y: 1, x: 1});
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coll.createIndex({z: 1, y: 1});
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coll.insertMany([
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{x: 3, y: 7, z: 5},
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{x: 5, y: 5, z: 6},
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{x: 5, y: 4, z: 5},
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{x: 6, y: 3, z: 5},
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{x: 7, y: 8, z: 5},
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{x: 8, y: 3, z: 7},
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{x: 8, y: 3, z: 8},
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]);
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outputDistinctPlanAndResults(coll, "x", {x: {$gt: 3}, z: 5});
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section("Only DISTINCT_SCAN candidates considered");
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coll.drop();
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coll.createIndex({x: 1, y: 1});
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coll.createIndex({y: 1, x: 1});
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coll.createIndex({x: 1, z: 1, y: 1});
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coll.insertMany([
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{x: 3, y: 5, z: 7},
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{x: 5, y: 6, z: 5},
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{x: 5, y: 5, z: 4},
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{x: 6, y: 5, z: 3},
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{x: 7, y: 5, z: 8},
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{x: 8, y: 7, z: 3},
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{x: 8, y: 8, z: 3},
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]);
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outputDistinctPlanAndResults(coll, "x", {x: {$gt: 3}, y: 5});
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section("Prefer DISTINCT_SCAN for many duplicate values in the collection");
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coll.drop();
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for (let i = 0; i < 100; ++i)
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coll.insert({x: i % 2, y: i + 100, z: i + 200});
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coll.createIndex({x: 1});
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coll.createIndex({x: 1, y: 1});
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coll.createIndex({y: 1, z: 1});
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outputDistinctPlanAndResults(coll, "x", {x: {$gt: -1}, y: {$lt: 250}});
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section("Prefer FETCH + filter + IXSCAN for more selective predicate on y");
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coll.drop();
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for (let i = 0; i < 100; ++i)
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coll.insert({x: i, y: i + 100, z: i + 200});
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coll.createIndex({x: 1});
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coll.createIndex({x: 1, y: 1});
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coll.createIndex({y: 1, z: 1});
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outputDistinctPlanAndResults(coll, "x", {x: {$gt: -1}, y: {$lt: 105}});
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section("Use hinted DISTINCT_SCAN");
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coll.drop();
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coll.createIndex({x: 1, y: 1});
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coll.createIndex({y: 1, x: 1});
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coll.createIndex({x: 1, z: 1, y: 1});
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coll.insertMany([
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{x: 3, y: 5, z: 7},
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{x: 5, y: 6, z: 5},
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{x: 5, y: 5, z: 4},
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{x: 6, y: 5, z: 3},
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{x: 7, y: 5, z: 8},
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{x: 8, y: 7, z: 3},
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{x: 8, y: 8, z: 3},
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]);
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outputDistinctPlanAndResults(coll, "x", {x: {$gt: 3}, y: 5}, {hint: {x: 1, y: 1}});
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section("Use hinted IXSCAN, even with preferable DISTINCT_SCAN");
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coll.drop();
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for (let i = 0; i < 100; ++i)
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coll.insert({x: i % 2, y: i + 100, z: i + 200});
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coll.createIndex({x: 1});
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coll.createIndex({x: 1, y: 1});
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coll.createIndex({y: 1, z: 1});
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outputDistinctPlanAndResults(coll, "x", {x: {$gt: -1}, y: {$lt: 250}}, {hint: {x: 1}});
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section("Use hinted COLLSCAN, even with preferable DISTINCT_SCAN");
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outputDistinctPlanAndResults(coll, "x", {x: {$gt: -1}, y: {$lt: 250}}, {hint: {$natural: 1}});
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section("Use hinted DISTINCT_SCAN, even with no duplicate values");
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coll.drop();
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for (let i = 0; i < 100; ++i)
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coll.insert({x: i, y: i + 100, z: i + 200});
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coll.createIndex({x: 1});
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coll.createIndex({x: 1, y: 1});
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coll.createIndex({y: 1, z: 1});
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outputDistinctPlanAndResults(coll, "x", {x: {$gt: -1}, y: {$lt: 105}}, {hint: {x: 1, y: 1}});
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