for ( LeftTuple peer = leftTuple.getPeer(); peer != null; peer = peer.getPeer() ) {
LeftTupleSets stagedLeftTuples = smem.getStagedLeftTuples();
switch ( peer.getStagedType() ) {
// handle clash with already staged entries
case LeftTuple.INSERT:
stagedLeftTuples.removeInsert( peer );
break;
case LeftTuple.UPDATE:
stagedLeftTuples.removeUpdate( peer );
break;
}