long long Helpers::removeRange( const string& ns , const BSONObj& min , const BSONObj& max , bool yield , bool maxInclusive , RemoveCallback * callback, bool fromMigrate ) {
BSONObj keya , keyb;
BSONObj minClean = toKeyFormat( min , keya );
BSONObj maxClean = toKeyFormat( max , keyb );
verify( keya == keyb );
Client::Context ctx(ns);
shared_ptr<Cursor> c;
auto_ptr<ClientCursor> cc;
{
NamespaceDetails* nsd = nsdetails( ns.c_str() );
if ( ! nsd )
return 0;
int ii = nsd->findIndexByKeyPattern( keya );
verify( ii >= 0 );
IndexDetails& i = nsd->idx( ii );
c.reset( BtreeCursor::make( nsd , ii , i , minClean , maxClean , maxInclusive, 1 ) );
cc.reset( new ClientCursor( QueryOption_NoCursorTimeout , c , ns ) );
cc->setDoingDeletes( true );
}
long long num = 0;
while ( cc->ok() ) {
if ( yield && ! cc->yieldSometimes( ClientCursor::WillNeed) ) {
// cursor got finished by someone else, so we're done
cc.release(); // if the collection/db is dropped, cc may be deleted
break;
}
if ( ! cc->ok() )
break;
DiskLoc rloc = cc->currLoc();
if ( callback )
callback->goingToDelete( cc->current() );
cc->advance();
c->prepareToTouchEarlierIterate();
logOp( "d" , ns.c_str() , rloc.obj()["_id"].wrap() , 0 , 0 , fromMigrate );
theDataFileMgr.deleteRecord(ns.c_str() , rloc.rec(), rloc);
num++;
c->recoverFromTouchingEarlierIterate();
getDur().commitIfNeeded();
}
return num;
}
long long Helpers::removeRange( const string& ns , const BSONObj& min , const BSONObj& max , bool yield , bool maxInclusive , RemoveCallback * callback ) {
BSONObj keya , keyb;
BSONObj minClean = toKeyFormat( min , keya );
BSONObj maxClean = toKeyFormat( max , keyb );
assert( keya == keyb );
Client::Context ctx(ns);
NamespaceDetails* nsd = nsdetails( ns.c_str() );
if ( ! nsd )
return 0;
int ii = nsd->findIndexByKeyPattern( keya );
assert( ii >= 0 );
long long num = 0;
IndexDetails& i = nsd->idx( ii );
shared_ptr<Cursor> c( new BtreeCursor( nsd , ii , i , minClean , maxClean , maxInclusive, 1 ) );
auto_ptr<ClientCursor> cc( new ClientCursor( QueryOption_NoCursorTimeout , c , ns ) );
cc->setDoingDeletes( true );
while ( c->ok() ) {
DiskLoc rloc = c->currLoc();
BSONObj key = c->currKey();
if ( callback )
callback->goingToDelete( c->current() );
c->advance();
c->noteLocation();
logOp( "d" , ns.c_str() , rloc.obj()["_id"].wrap() );
theDataFileMgr.deleteRecord(ns.c_str() , rloc.rec(), rloc);
num++;
c->checkLocation();
if ( yield && ! cc->yieldSometimes() ) {
// cursor got finished by someone else, so we're done
cc.release(); // if the collection/db is dropped, cc may be deleted
break;
}
}
return num;
}