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fixed rename

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This commit is contained in:
Rebecca Schofield 2015-09-22 09:03:42 -05:00
parent b6af7f18c8
commit 1492321b9b
8 changed files with 29 additions and 27 deletions
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4
Attribute.cpp
View file

@ -45,10 +45,6 @@ bool Attribute::isKey(){
return key; return key;
} }
void Attribute::rename(string s){
name = s;
}
//may need to change primary key implementation //may need to change primary key implementation
int Attribute::getSize(){ int Attribute::getSize(){
return size; return size;

1
Attribute.h
View file

@ -21,6 +21,5 @@ public:
string getType(); string getType();
bool isKey(); bool isKey();
int getSize(); int getSize();
void rename(string s);
void display(); void display();
}; };

9
DBEngine.cpp
View file

@ -28,7 +28,7 @@ vector<Relation> DBEngine::getRelations(){
return tables; return tables;
} }
Relation DBEngine::getTableFromName(string n){ Relation& DBEngine::getTableFromName(string n){
//will return first occurence //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){
@ -61,7 +61,7 @@ Relation DBEngine::projection(vector<string> input, Relation r){
} }
//ASAP: TEST ALL OF THIS //ASAP: TEST ALL OF THIS
void 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.";
return; return;
@ -73,11 +73,8 @@ void rename(Relation r, vector<string> oldnames, vector<string> newnames){
} }
else { else {
Attribute temp;
for(int i = 0; i < oldnames.size(); ++i){ for(int i = 0; i < oldnames.size(); ++i){
temp = r.getAttributeByName(oldnames[i]); r.renameAttribute(oldnames[i], newnames[i]);
temp.setName(newnames[i]);
} }
} }
} }

4
DBEngine.h
View file

@ -15,13 +15,13 @@ public:
void createTable(Relation r); void createTable(Relation r);
vector<Relation> getRelations(); vector<Relation> getRelations();
//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 //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);
//void setUnion(); //void setUnion();
//void setDiff(); //void setDiff();
//void crossProduct(); //void crossProduct();

6
Relation.cpp
View file

@ -29,7 +29,7 @@ vector<string> Relation::getAttributeNames(){
return temp; return temp;
} }
Attribute Relation::getAttributeByName(string s) { Attribute& Relation::getAttributeByName(string s) {
for(int i = 0; i < size; ++i){ for(int i = 0; i < size; ++i){
if (att[i].getName() == s) { if (att[i].getName() == s) {
return att[i]; return att[i];
@ -39,6 +39,10 @@ Attribute Relation::getAttributeByName(string s) {
cout << "Failure to return: the requested attribute does not exist."; cout << "Failure to return: the requested attribute does not exist.";
} }
void Relation::renameAttribute(string oldstr, string newstr){
this->getAttributeByName(oldstr).setName(newstr);
}
int Relation::getSize(){ int Relation::getSize(){
return size; return size;
} }

3
Relation.h
View file

@ -13,7 +13,8 @@ public:
string getTableName(); string getTableName();
vector<Attribute> getAttributes(); vector<Attribute> getAttributes();
vector<string> getAttributeNames(); vector<string> getAttributeNames();
Attribute getAttributeByName(string s); Attribute& getAttributeByName(string s);
void renameAttribute(string oldstr, string newstr);
int getSize(); int getSize();
void display(); void display();
void insertTuple(vector<string> tuple); //we are assuming they are in order void insertTuple(vector<string> tuple); //we are assuming they are in order

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a.out
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29
test.cpp
View file

@ -26,26 +26,31 @@ int main() {
v.push_back(att2); v.push_back(att2);
v.push_back(att3); v.push_back(att3);
Relation r("Food", v); //Relation r("Food", v);
//r.renameAttribute("Breakfast", "BFST");
//r.display();
engine.createTable("Food", v);
vector<string> tuple; vector<string> tuple;
tuple.push_back("Omelette"); tuple.push_back("Omelette");
tuple.push_back("Fried Rice"); tuple.push_back("Fried Rice");
tuple.push_back("Grouper"); tuple.push_back("Grouper");
r.insertTuple(tuple); engine.getTableFromName("Food").insertTuple(tuple);
r.display();
vector<string> o; vector<string> old;
vector<string> n; vector<string> newa;
o.push_back("Breakfast"); old.push_back("Breakfast");
o.push_back("Lunch"); old.push_back("Lunch");
o.push_back("Dinner"); old.push_back("Dinner");
n.push_back("Tsafkaerb"); newa.push_back("Tsafkaerb");
n.push_back("Hcnul"); newa.push_back("Hcnul");
n.push_back("Rennid"); newa.push_back("Rennid");
//engine.rename(r, o, n); engine.rename(engine.getTableFromName("Food"), old, newa);
engine.getTableFromName("Food").display();
cout << "finished";
} }