// walk the index for all the nodes that reference delnode
for (;;) {
Row refrow = refiterator.getNextRow();
if (refrow == null || refrow.isDeleted(session)
|| refindex.compareRowNonUnique(
mdata, m_columns, refrow.getData()) != 0) {
break;
}
// -- if the constraint is a 'SET [DEFAULT|NULL]' constraint we have to keep