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/**
* Copyright (C) 2011 10gen Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* 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
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "mongo/db/query_optimizer.h"
#include "mongo/db/query_optimizer_internal.h"
#include "mongo/db/queryoptimizercursorimpl.h"
#include "mongo/db/queryutil.h"
namespace mongo {
shared_ptr<Cursor> getOptimizedCursor( const StringData& ns,
const BSONObj& query,
const BSONObj& order,
const QueryPlanSelectionPolicy& planPolicy,
const shared_ptr<const ParsedQuery>& parsedQuery,
bool requireOrder,
QueryPlanSummary* singlePlanSummary ) {
CursorGenerator generator( ns,
query,
order,
planPolicy,
parsedQuery,
requireOrder,
singlePlanSummary );
return generator.generate();
}
shared_ptr<Cursor> getBestGuessCursor( const char* ns,
const BSONObj& query,
const BSONObj& sort ) {
auto_ptr<FieldRangeSetPair> frsp( new FieldRangeSetPair( ns, query, true ) );
auto_ptr<FieldRangeSetPair> origFrsp( new FieldRangeSetPair( *frsp ) );
scoped_ptr<QueryPlanSet> qps( QueryPlanSet::make( ns,
frsp,
origFrsp,
query,
sort,
shared_ptr<const ParsedQuery>(),
BSONObj(),
QueryPlanGenerator::UseIfInOrder,
BSONObj(),
BSONObj(),
true ) );
QueryPlanSet::QueryPlanPtr qpp = qps->getBestGuess();
if( ! qpp.get() ) return shared_ptr<Cursor>();
shared_ptr<Cursor> ret = qpp->newCursor();
// If we don't already have a matcher, supply one.
if ( !query.isEmpty() && ! ret->matcher() ) {
ret->setMatcher( qpp->matcher() );
}
return ret;
}
} // namespace mongo;
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