Scheme Relation::join_scheme(Relation r2) {
Scheme s = Scheme();
// Put in the whole first scheme
for (auto var : this->scheme)
s.push_back(var);
// Put in any additional vars from the second scheme
for (auto var1 : this->scheme) {
for (auto var2 : r2.scheme) {
if (std::find(s.begin(), s.end(), var2) == s.end()) {
s.push_back(var2);
}
}
}
return s;
}
void Interpretter::evalSchemes(vector <Predicate>& schemeList) {
output += "Scheme Evaluation\n\n";
for (Predicate scheme : schemeList) { //a list of predicates
set <Tuple> tuples;
Scheme s;
for (auto param : scheme.getParams()) {
s.push_back(param.toString()); //for whatever reason, we can't have objects used from previous labs, so dump to string here
}
Relation r(scheme.getID(), s, tuples); //scheme.getParams() needs to be a set
db[r.getName()] = r;
//add relation to database
}
}