void QueryPlanSet::init() {
DEBUGQO( "QueryPlanSet::init " << ns << "\t" << _originalQuery );
_plans.clear();
_mayRecordPlan = true;
_usingPrerecordedPlan = false;
const char *ns = _frsp->ns();
NamespaceDetails *d = nsdetails( ns );
if ( !d || !_frsp->matchPossible() ) {
// Table scan plan, when no matches are possible
_plans.push_back( QueryPlanPtr( new QueryPlan( d, -1, *_frsp, *_originalFrsp, _originalQuery, _order ) ) );
return;
}
BSONElement hint = _hint.firstElement();
if ( !hint.eoo() ) {
_mayRecordPlan = false;
IndexDetails *id = parseHint( hint, d );
if ( id ) {
addHint( *id );
}
else {
massert( 10366 , "natural order cannot be specified with $min/$max", _min.isEmpty() && _max.isEmpty() );
// Table scan plan
_plans.push_back( QueryPlanPtr( new QueryPlan( d, -1, *_frsp, *_originalFrsp, _originalQuery, _order ) ) );
}
return;
}
if ( !_min.isEmpty() || !_max.isEmpty() ) {
string errmsg;
BSONObj keyPattern;
IndexDetails *idx = indexDetailsForRange( ns, errmsg, _min, _max, keyPattern );
massert( 10367 , errmsg, idx );
_plans.push_back( QueryPlanPtr( new QueryPlan( d, d->idxNo(*idx), *_frsp, *_originalFrsp, _originalQuery, _order, _min, _max ) ) );
return;
}
if ( isSimpleIdQuery( _originalQuery ) ) {
int idx = d->findIdIndex();
if ( idx >= 0 ) {
_usingPrerecordedPlan = true;
_mayRecordPlan = false;
_plans.push_back( QueryPlanPtr( new QueryPlan( d , idx , *_frsp , *_originalFrsp , _originalQuery, _order ) ) );
return;
}
}
if ( _originalQuery.isEmpty() && _order.isEmpty() ) {
_plans.push_back( QueryPlanPtr( new QueryPlan( d, -1, *_frsp, *_originalFrsp, _originalQuery, _order ) ) );
return;
}
DEBUGQO( "\t special : " << _frsp->getSpecial() );
if ( _frsp->getSpecial().size() ) {
_special = _frsp->getSpecial();
NamespaceDetails::IndexIterator i = d->ii();
while( i.more() ) {
int j = i.pos();
IndexDetails& ii = i.next();
const IndexSpec& spec = ii.getSpec();
if ( spec.getTypeName() == _special && spec.suitability( _originalQuery , _order ) ) {
_usingPrerecordedPlan = true;
_mayRecordPlan = false;
_plans.push_back( QueryPlanPtr( new QueryPlan( d , j , *_frsp , *_originalFrsp , _originalQuery, _order ,
BSONObj() , BSONObj() , _special ) ) );
return;
}
}
uassert( 13038 , (string)"can't find special index: " + _special + " for: " + _originalQuery.toString() , 0 );
}
if ( _honorRecordedPlan ) {
pair< BSONObj, long long > best = QueryUtilIndexed::bestIndexForPatterns( *_frsp, _order );
BSONObj bestIndex = best.first;
long long oldNScanned = best.second;
if ( !bestIndex.isEmpty() ) {
QueryPlanPtr p;
_oldNScanned = oldNScanned;
if ( !strcmp( bestIndex.firstElement().fieldName(), "$natural" ) ) {
// Table scan plan
p.reset( new QueryPlan( d, -1, *_frsp, *_originalFrsp, _originalQuery, _order ) );
}
NamespaceDetails::IndexIterator i = d->ii();
while( i.more() ) {
int j = i.pos();
IndexDetails& ii = i.next();
if( ii.keyPattern().woCompare(bestIndex) == 0 ) {
p.reset( new QueryPlan( d, j, *_frsp, *_originalFrsp, _originalQuery, _order ) );
}
}
massert( 10368 , "Unable to locate previously recorded index", p.get() );
if ( !( _bestGuessOnly && p->scanAndOrderRequired() ) ) {
_usingPrerecordedPlan = true;
_mayRecordPlan = false;
_plans.push_back( p );
return;
}
}
}
addOtherPlans( false );
}
void QueryPlanSet::init() {
plans_.clear();
mayRecordPlan_ = true;
usingPrerecordedPlan_ = false;
const char *ns = fbs_.ns();
NamespaceDetails *d = nsdetails( ns );
if ( !d || !fbs_.matchPossible() ) {
// Table scan plan, when no matches are possible
plans_.push_back( PlanPtr( new QueryPlan( fbs_, order_ ) ) );
return;
}
BSONElement hint = hint_.firstElement();
if ( !hint.eoo() ) {
mayRecordPlan_ = false;
if( hint.type() == String ) {
string hintstr = hint.valuestr();
for (int i = 0; i < d->nIndexes; i++ ) {
IndexDetails& ii = d->indexes[i];
if ( ii.indexName() == hintstr ) {
plans_.push_back( PlanPtr( new QueryPlan( fbs_, order_, &ii ) ) );
return;
}
}
}
else if( hint.type() == Object ) {
BSONObj hintobj = hint.embeddedObject();
uassert( "bad hint", !hintobj.isEmpty() );
if ( !strcmp( hintobj.firstElement().fieldName(), "$natural" ) ) {
// Table scan plan
plans_.push_back( PlanPtr( new QueryPlan( fbs_, order_ ) ) );
return;
}
for (int i = 0; i < d->nIndexes; i++ ) {
IndexDetails& ii = d->indexes[i];
if( ii.keyPattern().woCompare(hintobj) == 0 ) {
plans_.push_back( PlanPtr( new QueryPlan( fbs_, order_, &ii ) ) );
return;
}
}
}
uassert( "bad hint", false );
}
if ( honorRecordedPlan_ ) {
BSONObj bestIndex = NamespaceDetailsTransient::get( ns ).indexForPattern( fbs_.pattern( order_ ) );
if ( !bestIndex.isEmpty() ) {
usingPrerecordedPlan_ = true;
mayRecordPlan_ = false;
oldNScanned_ = NamespaceDetailsTransient::get( ns ).nScannedForPattern( fbs_.pattern( order_ ) );
if ( !strcmp( bestIndex.firstElement().fieldName(), "$natural" ) ) {
// Table scan plan
plans_.push_back( PlanPtr( new QueryPlan( fbs_, order_ ) ) );
return;
}
for (int i = 0; i < d->nIndexes; i++ ) {
IndexDetails& ii = d->indexes[i];
if( ii.keyPattern().woCompare(bestIndex) == 0 ) {
plans_.push_back( PlanPtr( new QueryPlan( fbs_, order_, &ii ) ) );
return;
}
}
massert( "Unable to locate previously recorded index", false );
}
}
addOtherPlans( false );
}
