public void visit(RelNode rel, int ordinal, RelNode parent) {
// REVIEW: SWZ: 1/31/06: We assume that any special RelNodes, such
// as the VolcanoPlanner's RelSubset always have a full complement
// of traits and that they either appear as registered or do nothing
// when childrenAccept is called on them.
if (planner.isRegistered(rel)) {
return;
}
RelTraitSet relTraits = rel.getTraitSet();
for (int i = 0; i < baseTraits.size(); i++) {
if (i >= relTraits.size()) {
// Copy traits that the new rel doesn't know about.
Util.discard(RelOptUtil.addTrait(rel, baseTraits.getTrait(i)));
// FIXME: Return the new rel. We can no longer traits in-place,
// because rels and traits are immutable.
throw new AssertionError();
} else {
// Verify that the traits are from the same RelTraitDef
assert relTraits.getTrait(i).getTraitDef() == baseTraits.getTrait(i).getTraitDef();
}
}
rel.childrenAccept(this);
}
