@Override
public Void visitProjectOperator(ProjectOperator op, Pair<LogicalVariable, LogicalVariable> pair)
throws AlgebricksException {
List<LogicalVariable> usedVariables = op.getVariables();
int n = usedVariables.size();
for (int i = 0; i < n; i++) {
LogicalVariable v = usedVariables.get(i);
if (v.equals(pair.first)) {
usedVariables.set(i, pair.second);
}
}
substVarTypes(op, pair);
return null;
}
@Override
public Void visitProjectOperator(ProjectOperator op, Void arg) throws AlgebricksException {
schemaVariables.addAll(op.getVariables());
return null;
}