public void unsetSchema() throws VisitorException{
for(LogicalOperator input: getInputs()) {
Collection<LogicalPlan> joinPlans = mJoinPlans.get(input);
if(joinPlans!=null)
for(LogicalPlan plan : joinPlans) {
SchemaRemover sr = new SchemaRemover(plan);
sr.visit();
}
}
super.unsetSchema();
}