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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.
*/
#define MONGO_LOG_DEFAULT_COMPONENT ::mongo::logger::LogComponent::kQuery
#include "mongo/platform/basic.h"
#include "mongo/db/index/haystack_access_method.h"
#include "mongo/base/status.h"
#include "mongo/db/bson/dotted_path_support.h"
#include "mongo/db/catalog/index_catalog.h"
#include "mongo/db/exec/working_set_common.h"
#include "mongo/db/geo/hash.h"
#include "mongo/db/index/expression_keys_private.h"
#include "mongo/db/index/expression_params.h"
#include "mongo/db/index/haystack_access_method_internal.h"
#include "mongo/db/jsobj.h"
#include "mongo/db/query/internal_plans.h"
#include "mongo/logv2/log.h"
#include "mongo/util/log.h"
namespace mongo {
using std::unique_ptr;
namespace dps = ::mongo::dotted_path_support;
HaystackAccessMethod::HaystackAccessMethod(IndexCatalogEntry* btreeState,
std::unique_ptr<SortedDataInterface> btree)
: AbstractIndexAccessMethod(btreeState, std::move(btree)) {
const IndexDescriptor* descriptor = btreeState->descriptor();
ExpressionParams::parseHaystackParams(
descriptor->infoObj(), &_geoField, &_otherFields, &_bucketSize);
uassert(16773, "no geo field specified", _geoField.size());
uassert(16774, "no non-geo fields specified", _otherFields.size());
}
void HaystackAccessMethod::doGetKeys(const BSONObj& obj,
GetKeysContext context,
KeyStringSet* keys,
KeyStringSet* multikeyMetadataKeys,
MultikeyPaths* multikeyPaths,
boost::optional<RecordId> id) const {
ExpressionKeysPrivate::getHaystackKeys(obj,
_geoField,
_otherFields,
_bucketSize,
keys,
getSortedDataInterface()->getKeyStringVersion(),
getSortedDataInterface()->getOrdering(),
id);
}
void HaystackAccessMethod::searchCommand(OperationContext* opCtx,
Collection* collection,
const BSONObj& nearObj,
double maxDistance,
const BSONObj& search,
BSONObjBuilder* result,
unsigned limit) const {
Timer t;
LOGV2_DEBUG(20680,
1,
"SEARCH near:{nearObj} maxDistance:{maxDistance} search: {search}",
"nearObj"_attr = redact(nearObj),
"maxDistance"_attr = maxDistance,
"search"_attr = redact(search));
int x, y;
{
BSONObjIterator i(nearObj);
x = ExpressionKeysPrivate::hashHaystackElement(i.next(), _bucketSize);
y = ExpressionKeysPrivate::hashHaystackElement(i.next(), _bucketSize);
}
int scale = static_cast<int>(ceil(maxDistance / _bucketSize));
GeoHaystackSearchHopper hopper(opCtx, nearObj, maxDistance, limit, _geoField, collection);
long long btreeMatches = 0;
for (int a = -scale; a <= scale && !hopper.limitReached(); ++a) {
for (int b = -scale; b <= scale && !hopper.limitReached(); ++b) {
BSONObjBuilder bb;
bb.append("", ExpressionKeysPrivate::makeHaystackString(x + a, y + b));
for (unsigned i = 0; i < _otherFields.size(); i++) {
// See if the non-geo field we're indexing on is in the provided search term.
BSONElement e = dps::extractElementAtPath(search, _otherFields[i]);
if (e.eoo())
bb.appendNull("");
else
bb.appendAs(e, "");
}
BSONObj key = bb.obj();
stdx::unordered_set<RecordId, RecordId::Hasher> thisPass;
auto exec = InternalPlanner::indexScan(opCtx,
collection,
_descriptor,
key,
key,
BoundInclusion::kIncludeBothStartAndEndKeys,
PlanExecutor::NO_YIELD);
PlanExecutor::ExecState state;
BSONObj obj;
RecordId loc;
while (PlanExecutor::ADVANCED == (state = exec->getNext(&obj, &loc))) {
if (hopper.limitReached()) {
break;
}
pair<stdx::unordered_set<RecordId, RecordId::Hasher>::iterator, bool> p =
thisPass.insert(loc);
// If a new element was inserted (haven't seen the RecordId before), p.second
// is true.
if (p.second) {
hopper.consider(loc);
btreeMatches++;
}
}
// Non-yielding collection scans from InternalPlanner will never error.
invariant(PlanExecutor::ADVANCED == state || PlanExecutor::IS_EOF == state);
}
}
BSONArrayBuilder arr(result->subarrayStart("results"));
int num = hopper.appendResultsTo(&arr);
arr.done();
{
BSONObjBuilder b(result->subobjStart("stats"));
b.append("time", t.millis());
b.appendNumber("btreeMatches", btreeMatches);
b.append("n", num);
b.done();
}
}
} // namespace mongo
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