* Rebuild projection maps after a rule has transformed the tree. This will first
* null out existing projection maps and then call getProjectionMap to rebuild them.
* @throws VisitorException
*/
protected void rebuildProjectionMaps() throws VisitorException {
ProjectionMapRemover pMapRemover = new ProjectionMapRemover(mPlan);
pMapRemover.visit();
ProjectionMapCalculator pMapCalculator = new ProjectionMapCalculator(mPlan);
pMapCalculator.visit();
}