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fixed rename

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This commit is contained in:
Rebecca Schofield 2015-09-22 18:42:50 -05:00
parent 75be5ae221
commit 41ee4c99d2
3 changed files with 15 additions and 5 deletions
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13
Condition.h Executable file
View file

@ -0,0 +1,13 @@
#include <iostream>
#include "Attribute.h"
using namespace std;
class Condition{
Attribute att;
public:
//currently only implemented for comparison
Condition(Attribute a);
Condition(Attribute a);
};

5
DBEngine.cpp
View file

@ -29,7 +29,6 @@ vector<Relation> DBEngine::getRelations(){
} }
Relation& DBEngine::getTableFromName(string n){ Relation& DBEngine::getTableFromName(string n){
//will return first occurence
for(int i = 0; i < tables.size(); i++){ for(int i = 0; i < tables.size(); i++){
if (tables[i].getTableName() == n){ if (tables[i].getTableName() == n){
return tables[i]; return tables[i];
@ -37,8 +36,8 @@ Relation& DBEngine::getTableFromName(string n){
} }
} }
//currently writes nothing meaningful
void DBEngine::saveToFile(vector<string> cmds){ void DBEngine::saveToFile(vector<string> cmds){
//writes nothing meaningful
ofstream file; ofstream file;
file.open("savefile.db"); file.open("savefile.db");
@ -60,7 +59,7 @@ Relation DBEngine::projection(vector<string> input, Relation r){
// } // }
} }
//ASAP: TEST ALL OF THIS //TEST ERRORS MATCHING
void DBEngine::rename(Relation& r, vector<string> oldnames, vector<string> newnames){ void DBEngine::rename(Relation& r, vector<string> oldnames, vector<string> newnames){
if (oldnames.size() != newnames.size()) { if (oldnames.size() != newnames.size()) {
cout << "Failure to rename: number of attributes do not match."; cout << "Failure to rename: number of attributes do not match.";

2
DBEngine.h
View file

@ -17,8 +17,6 @@ public:
//void showTable(Relation r); //void showTable(Relation r);
Relation& getTableFromName(string n); Relation& getTableFromName(string n);
void saveToFile(vector<string> cmds); void saveToFile(vector<string> cmds);
//operations
//Relation selection(); //Relation selection();
Relation projection(vector<string> input, Relation r); Relation projection(vector<string> input, Relation r);
void rename(Relation& r, vector<string> oldnames, vector<string> newnames); void rename(Relation& r, vector<string> oldnames, vector<string> newnames);