72 lines
2.9 KiB
JavaScript
72 lines
2.9 KiB
JavaScript
// Cannot implicitly shard accessed collections because queries on a sharded collection are not
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// able to be covered when they aren't on the shard key since the document needs to be fetched in
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// order to apply the SHARDING_FILTER stage.
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// @tags: [assumes_unsharded_collection]
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// Simple covered index query test with unique index
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// Include helpers for analyzing explain output.
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load("jstests/libs/analyze_plan.js");
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var coll = db.getCollection("covered_simple_2");
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coll.drop();
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for (i = 0; i < 10; i++) {
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coll.insert({foo: i});
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}
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coll.insert({foo: "string"});
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coll.insert({foo: {bar: 1}});
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coll.insert({foo: null});
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coll.ensureIndex({foo: 1}, {unique: true});
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// Test equality with int value
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var plan = coll.find({foo: 1}, {foo: 1, _id: 0}).hint({foo: 1}).explain("executionStats");
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assert(isIndexOnly(db, plan.queryPlanner.winningPlan),
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"simple.2.1 - indexOnly should be true on covered query");
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assert.eq(0,
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plan.executionStats.totalDocsExamined,
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"simple.2.1 - docs examined should be 0 for covered query");
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// Test equality with string value
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var plan = coll.find({foo: "string"}, {foo: 1, _id: 0}).hint({foo: 1}).explain("executionStats");
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assert(isIndexOnly(db, plan.queryPlanner.winningPlan),
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"simple.2.2 - indexOnly should be true on covered query");
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assert.eq(0,
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plan.executionStats.totalDocsExamined,
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"simple.2.2 - docs examined should be 0 for covered query");
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// Test equality with int value on a dotted field
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var plan = coll.find({foo: {bar: 1}}, {foo: 1, _id: 0}).hint({foo: 1}).explain("executionStats");
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assert(isIndexOnly(db, plan.queryPlanner.winningPlan),
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"simple.2.3 - indexOnly should be true on covered query");
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assert.eq(0,
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plan.executionStats.totalDocsExamined,
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"simple.2.3 - docs examined should be 0 for covered query");
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// Test no query
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var plan = coll.find({}, {foo: 1, _id: 0}).hint({foo: 1}).explain("executionStats");
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assert(isIndexOnly(db, plan.queryPlanner.winningPlan),
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"simple.2.4 - indexOnly should be true on covered query");
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assert.eq(0,
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plan.executionStats.totalDocsExamined,
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"simple.2.4 - docs examined should be 0 for covered query");
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// Test range query
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var plan =
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coll.find({foo: {$gt: 2, $lt: 6}}, {foo: 1, _id: 0}).hint({foo: 1}).explain("executionStats");
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assert(isIndexOnly(db, plan.queryPlanner.winningPlan),
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"simple.2.5 - indexOnly should be true on covered query");
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assert.eq(0,
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plan.executionStats.totalDocsExamined,
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"simple.2.5 - docs examined should be 0 for covered query");
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// Test in query
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var plan =
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coll.find({foo: {$in: [5, 8]}}, {foo: 1, _id: 0}).hint({foo: 1}).explain("executionStats");
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assert(isIndexOnly(db, plan.queryPlanner.winningPlan),
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"simple.2.6 - indexOnly should be true on covered query");
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assert.eq(0,
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plan.executionStats.totalDocsExamined,
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"simple.2.6 - docs examined should be 0 for covered query");
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print('all tests pass');
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