if ( constant.length()>0)
{
try
{
int lineNumber=codeAttribute.getLineNumber( instruction.getInstructionStart());
DBString target=DBString.get(db.getSession(),constant);
if ( ! stringRefUpdater.existsReference(target, lineNumber))
{
stringRefUpdater.addReference( new DBStringReference(DBMethod.this, target, lineNumber));
}
}