super.visit(e);
}
@Override
protected void visit(JoinedSource s) throws VisitException {
RecordSource left = s.getLeft();
RecordSource right = s.getRight();
Expr join = s.getJoinExpr();
Expr window = s.getWindowExpr();
if (mOldChild == left) {
s.setLeft((RecordSource) mNewChild);