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/**
* Copyright (C) 2018-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
/**
* This file contains tests for mongo/db/commands/index_filter_commands.h
*/
#include "mongo/db/commands/index_filter_commands.h"
#include <memory>
#include "mongo/db/json.h"
#include "mongo/db/operation_context_noop.h"
#include "mongo/db/query/collation/collator_interface_mock.h"
#include "mongo/db/query/plan_ranker.h"
#include "mongo/db/query/query_solution.h"
#include "mongo/db/query/query_test_service_context.h"
#include "mongo/unittest/unittest.h"
using namespace mongo;
namespace {
using std::string;
using std::unique_ptr;
using std::vector;
static const NamespaceString nss("test.collection");
/**
* Utility function to get list of index filters from the query settings.
*/
vector<BSONObj> getFilters(const QuerySettings& querySettings) {
BSONObjBuilder bob;
ASSERT_OK(ListFilters::list(querySettings, &bob));
BSONObj resultObj = bob.obj();
BSONElement filtersElt = resultObj.getField("filters");
ASSERT_EQUALS(filtersElt.type(), mongo::Array);
vector<BSONElement> filtersEltArray = filtersElt.Array();
vector<BSONObj> filters;
for (vector<BSONElement>::const_iterator i = filtersEltArray.begin();
i != filtersEltArray.end();
++i) {
const BSONElement& elt = *i;
ASSERT_TRUE(elt.isABSONObj());
BSONObj obj = elt.Obj();
// Check required fields.
// query
BSONElement queryElt = obj.getField("query");
ASSERT_TRUE(queryElt.isABSONObj());
// sort
BSONElement sortElt = obj.getField("sort");
ASSERT_TRUE(sortElt.isABSONObj());
// projection
BSONElement projectionElt = obj.getField("projection");
ASSERT_TRUE(projectionElt.isABSONObj());
// collation (optional)
BSONElement collationElt = obj.getField("collation");
if (!collationElt.eoo()) {
ASSERT_TRUE(collationElt.isABSONObj());
}
// indexes
BSONElement indexesElt = obj.getField("indexes");
ASSERT_EQUALS(indexesElt.type(), mongo::Array);
// All fields OK. Append to vector.
filters.push_back(obj.getOwned());
}
return filters;
}
/**
* Utility function to create a PlanRankingDecision
*/
std::unique_ptr<plan_ranker::PlanRankingDecision> createDecision(size_t numPlans) {
auto why = std::make_unique<plan_ranker::PlanRankingDecision>();
std::vector<std::unique_ptr<PlanStageStats>> stats;
for (size_t i = 0; i < numPlans; ++i) {
CommonStats common("COLLSCAN");
auto stat = std::make_unique<PlanStageStats>(common, STAGE_COLLSCAN);
stat->specific.reset(new CollectionScanStats());
stats.push_back(std::move(stat));
why->scores.push_back(0U);
why->candidateOrder.push_back(i);
}
why->getStats<PlanStageStats>().candidatePlanStats = std::move(stats);
return why;
}
/**
* Injects an entry into plan cache for query shape.
*/
void addQueryShapeToPlanCache(OperationContext* opCtx,
PlanCache* planCache,
const char* queryStr,
const char* sortStr,
const char* projectionStr,
const char* collationStr) {
// Create canonical query.
auto findCommand = std::make_unique<FindCommandRequest>(nss);
findCommand->setFilter(fromjson(queryStr));
findCommand->setSort(fromjson(sortStr));
findCommand->setProjection(fromjson(projectionStr));
findCommand->setCollation(fromjson(collationStr));
auto statusWithCQ = CanonicalQuery::canonicalize(opCtx, std::move(findCommand));
ASSERT_OK(statusWithCQ.getStatus());
std::unique_ptr<CanonicalQuery> cq = std::move(statusWithCQ.getValue());
QuerySolution qs{QueryPlannerParams::Options::DEFAULT};
qs.cacheData.reset(new SolutionCacheData());
qs.cacheData->tree.reset(new PlanCacheIndexTree());
std::vector<QuerySolution*> solns;
solns.push_back(&qs);
ASSERT_OK(planCache->set(*cq,
solns,
createDecision(1U),
opCtx->getServiceContext()->getPreciseClockSource()->now()));
}
/**
* Checks if plan cache contains query shape.
*/
bool planCacheContains(OperationContext* opCtx,
const PlanCache& planCache,
const char* queryStr,
const char* sortStr,
const char* projectionStr,
const char* collationStr) {
// Create canonical query.
auto findCommand = std::make_unique<FindCommandRequest>(nss);
findCommand->setFilter(fromjson(queryStr));
findCommand->setSort(fromjson(sortStr));
findCommand->setProjection(fromjson(projectionStr));
findCommand->setCollation(fromjson(collationStr));
auto statusWithInputQuery = CanonicalQuery::canonicalize(opCtx, std::move(findCommand));
ASSERT_OK(statusWithInputQuery.getStatus());
unique_ptr<CanonicalQuery> inputQuery = std::move(statusWithInputQuery.getValue());
// Retrieve cache entries from plan cache.
auto entries = planCache.getAllEntries();
// Search keys.
bool found = false;
for (auto&& entry : entries) {
ASSERT(entry->debugInfo);
const auto& createdFromQuery = entry->debugInfo->createdFromQuery;
// Canonicalize the query shape stored in the cache entry in order to get the plan cache
// key.
auto findCommand = std::make_unique<FindCommandRequest>(nss);
findCommand->setFilter(createdFromQuery.filter);
findCommand->setSort(createdFromQuery.sort);
findCommand->setProjection(createdFromQuery.projection);
findCommand->setCollation(createdFromQuery.collation);
auto statusWithCurrentQuery = CanonicalQuery::canonicalize(opCtx, std::move(findCommand));
ASSERT_OK(statusWithCurrentQuery.getStatus());
unique_ptr<CanonicalQuery> currentQuery = std::move(statusWithCurrentQuery.getValue());
if (planCache.computeKey(*currentQuery) == planCache.computeKey(*inputQuery)) {
found = true;
}
}
return found;
}
/**
* Tests for ListFilters
*/
TEST(IndexFilterCommandsTest, ListFiltersEmpty) {
QuerySettings empty;
vector<BSONObj> filters = getFilters(empty);
ASSERT_TRUE(filters.empty());
}
/**
* Tests for ClearFilters
*/
TEST(IndexFilterCommandsTest, ClearFiltersInvalidParameter) {
QuerySettings empty;
PlanCache planCache;
OperationContextNoop opCtx;
// If present, query has to be an object.
ASSERT_NOT_OK(
ClearFilters::clear(&opCtx, &empty, &planCache, nss.ns(), fromjson("{query: 1234}")));
// If present, sort must be an object.
ASSERT_NOT_OK(ClearFilters::clear(
&opCtx, &empty, &planCache, nss.ns(), fromjson("{query: {a: 1}, sort: 1234}")));
// If present, projection must be an object.
ASSERT_NOT_OK(ClearFilters::clear(
&opCtx, &empty, &planCache, nss.ns(), fromjson("{query: {a: 1}, projection: 1234}")));
// Query must pass canonicalization.
ASSERT_NOT_OK(ClearFilters::clear(
&opCtx, &empty, &planCache, nss.ns(), fromjson("{query: {a: {$no_such_op: 1}}}")));
// Sort present without query is an error.
ASSERT_NOT_OK(
ClearFilters::clear(&opCtx, &empty, &planCache, nss.ns(), fromjson("{sort: {a: 1}}")));
// Projection present without query is an error.
ASSERT_NOT_OK(ClearFilters::clear(
&opCtx, &empty, &planCache, nss.ns(), fromjson("{projection: {_id: 0, a: 1}}")));
}
TEST(IndexFilterCommandsTest, ClearNonexistentHint) {
QuerySettings querySettings;
PlanCache planCache;
OperationContextNoop opCtx;
ASSERT_OK(SetFilter::set(&opCtx,
&querySettings,
&planCache,
nss.ns(),
fromjson("{query: {a: 1}, indexes: [{a: 1}]}")));
vector<BSONObj> filters = getFilters(querySettings);
ASSERT_EQUALS(filters.size(), 1U);
// Clear nonexistent hint.
// Command should succeed and cache should remain unchanged.
ASSERT_OK(ClearFilters::clear(
&opCtx, &querySettings, &planCache, nss.ns(), fromjson("{query: {b: 1}}")));
filters = getFilters(querySettings);
ASSERT_EQUALS(filters.size(), 1U);
}
/**
* Tests for SetFilter
*/
TEST(IndexFilterCommandsTest, SetFilterInvalidParameter) {
QuerySettings empty;
PlanCache planCache;
OperationContextNoop opCtx;
ASSERT_NOT_OK(SetFilter::set(&opCtx, &empty, &planCache, nss.ns(), fromjson("{}")));
// Missing required query field.
ASSERT_NOT_OK(
SetFilter::set(&opCtx, &empty, &planCache, nss.ns(), fromjson("{indexes: [{a: 1}]}")));
// Missing required indexes field.
ASSERT_NOT_OK(
SetFilter::set(&opCtx, &empty, &planCache, nss.ns(), fromjson("{query: {a: 1}}")));
// Query has to be an object.
ASSERT_NOT_OK(SetFilter::set(&opCtx,
&empty,
&planCache,
nss.ns(),
fromjson("{query: 1234, indexes: [{a: 1}, {b: 1}]}")));
// Indexes field has to be an array.
ASSERT_NOT_OK(SetFilter::set(
&opCtx, &empty, &planCache, nss.ns(), fromjson("{query: {a: 1}, indexes: 1234}")));
// Array indexes field cannot empty.
ASSERT_NOT_OK(SetFilter::set(
&opCtx, &empty, &planCache, nss.ns(), fromjson("{query: {a: 1}, indexes: []}")));
// Elements in indexes have to be objects.
ASSERT_NOT_OK(SetFilter::set(
&opCtx, &empty, &planCache, nss.ns(), fromjson("{query: {a: 1}, indexes: [{a: 1}, 99]}")));
// Objects in indexes cannot be empty.
ASSERT_NOT_OK(SetFilter::set(
&opCtx, &empty, &planCache, nss.ns(), fromjson("{query: {a: 1}, indexes: [{a: 1}, {}]}")));
// If present, sort must be an object.
ASSERT_NOT_OK(
SetFilter::set(&opCtx,
&empty,
&planCache,
nss.ns(),
fromjson("{query: {a: 1}, sort: 1234, indexes: [{a: 1}, {b: 1}]}")));
// If present, projection must be an object.
ASSERT_NOT_OK(
SetFilter::set(&opCtx,
&empty,
&planCache,
nss.ns(),
fromjson("{query: {a: 1}, projection: 1234, indexes: [{a: 1}, {b: 1}]}")));
// If present, collation must be an object.
ASSERT_NOT_OK(
SetFilter::set(&opCtx,
&empty,
&planCache,
nss.ns(),
fromjson("{query: {a: 1}, collation: 1234, indexes: [{a: 1}, {b: 1}]}")));
// Query must pass canonicalization.
ASSERT_NOT_OK(
SetFilter::set(&opCtx,
&empty,
&planCache,
nss.ns(),
fromjson("{query: {a: {$no_such_op: 1}}, indexes: [{a: 1}, {b: 1}]}")));
}
TEST(IndexFilterCommandsTest, SetAndClearFilters) {
QuerySettings querySettings;
PlanCache planCache;
QueryTestServiceContext serviceContext;
auto opCtx = serviceContext.makeOperationContext();
// Inject query shape into plan cache.
addQueryShapeToPlanCache(opCtx.get(),
&planCache,
"{a: 1, b: 1}",
"{a: -1}",
"{_id: 0, a: 1}",
"{locale: 'mock_reverse_string'}");
ASSERT_TRUE(planCacheContains(opCtx.get(),
planCache,
"{a: 1, b: 1}",
"{a: -1}",
"{_id: 0, a: 1}",
"{locale: 'mock_reverse_string'}"));
ASSERT_OK(SetFilter::set(opCtx.get(),
&querySettings,
&planCache,
nss.ns(),
fromjson("{query: {a: 1, b: 1}, sort: {a: -1}, projection: {_id: 0, "
"a: 1}, collation: {locale: 'mock_reverse_string'}, "
"indexes: [{a: 1}]}")));
vector<BSONObj> filters = getFilters(querySettings);
ASSERT_EQUALS(filters.size(), 1U);
// Query shape should not exist in plan cache after hint is updated.
ASSERT_FALSE(planCacheContains(opCtx.get(),
planCache,
"{a: 1, b: 1}",
"{a: -1}",
"{_id: 0, a: 1}",
"{locale: 'mock_reverse_string'}"));
// Fields in filter should match criteria in most recent query settings update.
ASSERT_BSONOBJ_EQ(filters[0].getObjectField("query"), fromjson("{a: 1, b: 1}"));
ASSERT_BSONOBJ_EQ(filters[0].getObjectField("sort"), fromjson("{a: -1}"));
ASSERT_BSONOBJ_EQ(filters[0].getObjectField("projection"), fromjson("{_id: 0, a: 1}"));
ASSERT_EQUALS(StringData(filters[0].getObjectField("collation").getStringField("locale")),
"mock_reverse_string");
// Replacing the hint for the same query shape ({a: 1, b: 1} and {b: 2, a: 3}
// share same shape) should not change the query settings size.
ASSERT_OK(SetFilter::set(opCtx.get(),
&querySettings,
&planCache,
nss.ns(),
fromjson("{query: {b: 2, a: 3}, sort: {a: -1}, projection: {_id: 0, "
"a: 1}, collation: {locale: 'mock_reverse_string'}, "
"indexes: [{a: 1, b: 1}]}")));
filters = getFilters(querySettings);
ASSERT_EQUALS(filters.size(), 1U);
auto filterIndexes = filters[0]["indexes"];
ASSERT(filterIndexes.type() == BSONType::Array);
auto filterArray = filterIndexes.Array();
ASSERT_EQ(filterArray.size(), 1U);
ASSERT_BSONOBJ_EQ(filterArray[0].Obj(), fromjson("{a: 1, b: 1}"));
// Add hint for different query shape.
ASSERT_OK(SetFilter::set(opCtx.get(),
&querySettings,
&planCache,
nss.ns(),
fromjson("{query: {b: 1}, indexes: [{b: 1}]}")));
filters = getFilters(querySettings);
ASSERT_EQUALS(filters.size(), 2U);
// Add hint for 3rd query shape. This is to prepare for ClearHint tests.
ASSERT_OK(SetFilter::set(opCtx.get(),
&querySettings,
&planCache,
nss.ns(),
fromjson("{query: {a: 1}, indexes: [{a: 1}]}")));
filters = getFilters(querySettings);
ASSERT_EQUALS(filters.size(), 3U);
// Add 2 entries to plan cache and check plan cache after clearing one/all filters.
addQueryShapeToPlanCache(opCtx.get(), &planCache, "{a: 1}", "{}", "{}", "{}");
addQueryShapeToPlanCache(opCtx.get(), &planCache, "{b: 1}", "{}", "{}", "{}");
// Clear single hint.
ASSERT_OK(ClearFilters::clear(
opCtx.get(), &querySettings, &planCache, nss.ns(), fromjson("{query: {a: 1}}")));
filters = getFilters(querySettings);
ASSERT_EQUALS(filters.size(), 2U);
// Query shape should not exist in plan cache after cleaing 1 hint.
ASSERT_FALSE(planCacheContains(opCtx.get(), planCache, "{a: 1}", "{}", "{}", "{}"));
ASSERT_TRUE(planCacheContains(opCtx.get(), planCache, "{b: 1}", "{}", "{}", "{}"));
// Clear all filters
ASSERT_OK(
ClearFilters::clear(opCtx.get(), &querySettings, &planCache, nss.ns(), fromjson("{}")));
filters = getFilters(querySettings);
ASSERT_TRUE(filters.empty());
// {b: 1} should be gone from plan cache after flushing query settings.
ASSERT_FALSE(planCacheContains(opCtx.get(), planCache, "{b: 1}", "{}", "{}", "{}"));
}
TEST(IndexFilterCommandsTest, SetAndClearFiltersCollation) {
QueryTestServiceContext serviceContext;
auto opCtx = serviceContext.makeOperationContext();
QuerySettings querySettings;
// Create a plan cache. Add an index so that indexability is included in the plan cache keys.
PlanCache planCache;
const auto keyPattern = fromjson("{a: 1}");
planCache.notifyOfIndexUpdates(
{CoreIndexInfo(keyPattern,
IndexNames::nameToType(IndexNames::findPluginName(keyPattern)),
true, // sparse
IndexEntry::Identifier{"index_name"})}); // name
// Inject query shapes with and without collation into plan cache.
addQueryShapeToPlanCache(
opCtx.get(), &planCache, "{a: 'foo'}", "{}", "{}", "{locale: 'mock_reverse_string'}");
addQueryShapeToPlanCache(opCtx.get(), &planCache, "{a: 'foo'}", "{}", "{}", "{}");
ASSERT_TRUE(planCacheContains(
opCtx.get(), planCache, "{a: 'foo'}", "{}", "{}", "{locale: 'mock_reverse_string'}"));
ASSERT_TRUE(planCacheContains(opCtx.get(), planCache, "{a: 'foo'}", "{}", "{}", "{}"));
ASSERT_OK(SetFilter::set(opCtx.get(),
&querySettings,
&planCache,
nss.ns(),
fromjson("{query: {a: 'foo'}, sort: {}, projection: {}, collation: "
"{locale: 'mock_reverse_string'}, "
"indexes: [{a: 1}]}")));
vector<BSONObj> filters = getFilters(querySettings);
ASSERT_EQUALS(filters.size(), 1U);
ASSERT_BSONOBJ_EQ(filters[0].getObjectField("query"), fromjson("{a: 'foo'}"));
ASSERT_BSONOBJ_EQ(filters[0].getObjectField("sort"), fromjson("{}"));
ASSERT_BSONOBJ_EQ(filters[0].getObjectField("projection"), fromjson("{}"));
ASSERT_EQUALS(StringData(filters[0].getObjectField("collation").getStringField("locale")),
"mock_reverse_string");
// Setting a filter will remove the cache entry associated with the query so now the plan cache
// should only contain the entry for the query without collation.
ASSERT_FALSE(planCacheContains(
opCtx.get(), planCache, "{a: 'foo'}", "{}", "{}", "{locale: 'mock_reverse_string'}"));
ASSERT_TRUE(planCacheContains(opCtx.get(), planCache, "{a: 'foo'}", "{}", "{}", "{}"));
// Add filter for query shape without collation.
ASSERT_OK(SetFilter::set(opCtx.get(),
&querySettings,
&planCache,
nss.ns(),
fromjson("{query: {a: 'foo'}, indexes: [{b: 1}]}")));
filters = getFilters(querySettings);
ASSERT_EQUALS(filters.size(), 2U);
// Add plan cache entries for both queries.
addQueryShapeToPlanCache(
opCtx.get(), &planCache, "{a: 'foo'}", "{}", "{}", "{locale: 'mock_reverse_string'}");
addQueryShapeToPlanCache(opCtx.get(), &planCache, "{a: 'foo'}", "{}", "{}", "{}");
// Clear filter for query with collation.
ASSERT_OK(ClearFilters::clear(
opCtx.get(),
&querySettings,
&planCache,
nss.ns(),
fromjson("{query: {a: 'foo'}, collation: {locale: 'mock_reverse_string'}}")));
filters = getFilters(querySettings);
ASSERT_EQUALS(filters.size(), 1U);
ASSERT_BSONOBJ_EQ(filters[0].getObjectField("query"), fromjson("{a: 'foo'}"));
ASSERT_BSONOBJ_EQ(filters[0].getObjectField("sort"), fromjson("{}"));
ASSERT_BSONOBJ_EQ(filters[0].getObjectField("projection"), fromjson("{}"));
ASSERT_BSONOBJ_EQ(filters[0].getObjectField("collation"), fromjson("{}"));
// Plan cache should only contain entry for query without collation.
ASSERT_FALSE(planCacheContains(
opCtx.get(), planCache, "{a: 'foo'}", "{}", "{}", "{locale: 'mock_reverse_string'}"));
ASSERT_TRUE(planCacheContains(opCtx.get(), planCache, "{a: 'foo'}", "{}", "{}", "{}"));
}
TEST(IndexFilterCommandsTest, SetFilterAcceptsIndexNames) {
CollatorInterfaceMock reverseCollator(CollatorInterfaceMock::MockType::kReverseString);
PlanCache planCache;
const auto keyPattern = fromjson("{a: 1}");
CoreIndexInfo collatedIndex(keyPattern,
IndexNames::nameToType(IndexNames::findPluginName(keyPattern)),
false, // sparse
IndexEntry::Identifier{"a_1:rev"}); // name
collatedIndex.collator = &reverseCollator;
QueryTestServiceContext serviceContext;
auto opCtx = serviceContext.makeOperationContext();
QuerySettings querySettings;
planCache.notifyOfIndexUpdates(
{CoreIndexInfo(keyPattern,
IndexNames::nameToType(IndexNames::findPluginName(keyPattern)),
false, // sparse
IndexEntry::Identifier{"a_1"}), // name
collatedIndex});
addQueryShapeToPlanCache(opCtx.get(), &planCache, "{a: 2}", "{}", "{}", "{}");
ASSERT_TRUE(planCacheContains(opCtx.get(), planCache, "{a: 2}", "{}", "{}", "{}"));
ASSERT_OK(SetFilter::set(opCtx.get(),
&querySettings,
&planCache,
nss.ns(),
fromjson("{query: {a: 2}, sort: {}, projection: {},"
"indexes: [{a: 1}, 'a_1:rev']}")));
auto filters = getFilters(querySettings);
ASSERT_EQUALS(filters.size(), 1U);
auto indexes = filters[0]["indexes"].Array();
ASSERT_BSONOBJ_EQ(indexes[0].embeddedObject(), fromjson("{a: 1}"));
ASSERT_EQUALS(indexes[1].valueStringData(), "a_1:rev");
}
} // namespace
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