63 lines
1.3 KiB
C++
Executable file
63 lines
1.3 KiB
C++
Executable file
#include <fstream>
|
|
#include <iostream>
|
|
#include <vector>
|
|
#include "Relation.h"
|
|
|
|
//still in progress
|
|
class DBEngine {
|
|
vector<Relation> tables;
|
|
int size;
|
|
|
|
public:
|
|
DBEngine(){
|
|
size = 0;
|
|
}
|
|
|
|
void createTable(string n, vector<Attribute> a) {
|
|
Relation r(n, a);
|
|
tables.push_back(r);
|
|
}
|
|
|
|
void createTable(Relation r) { tables.push_back(r); }
|
|
vector<Relation> getRelations() { return tables; }
|
|
void showTable(Relation r) { r.display(); }
|
|
|
|
Relation getTableFromName(string n) {
|
|
//will return first occurence
|
|
for(int i = 0; i < tables.size(); i++) {
|
|
if (tables[i].getTableName() == n) {
|
|
return tables[i];
|
|
}
|
|
}
|
|
}
|
|
|
|
void saveToFile(vector<string> cmds) {
|
|
ofstream file;
|
|
file.open("savefile.db");
|
|
|
|
for(int i = 0; i < cmds.size(); ++i){
|
|
file << cmds[i] << endl;
|
|
}
|
|
|
|
file.close();
|
|
}
|
|
|
|
void insertTuple(Relation r, vector<string> t) { r.addTuple(t); }
|
|
|
|
//need to add find by name
|
|
void deleteTuple(Relation r, int n) {
|
|
cout << "a";
|
|
r.removeTuple(n); }
|
|
|
|
void selectTuples() {
|
|
//
|
|
}
|
|
|
|
void project(Relation r, string n) { r.projectQuery(n); }
|
|
|
|
void product() { /*Brandon*/ }
|
|
|
|
bool unionComp(Relation r1, Relation r2) {
|
|
return ((r1.getSize() == r2.getSize()) && (r1.getDomains() == r2.getDomains()));
|
|
}
|
|
};
|