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Added the save function

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This commit is contained in:
Brandon Jackson 2015-09-25 00:31:23 -05:00
parent 5cadbd35ae
commit 391cc2ab50
1 changed files with 18 additions and 29 deletions
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47
DBEngine.cpp
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@ -25,11 +25,26 @@ void DBEngine::createTable(Relation r){
size++;
}
void DBEngine::storeCommands(string s){
commands.push_back(s);
}
void DBEngine::save(){
ofstream file;
file.open("savefile.txt");
for(int i = 0; i < commands.size(); ++i){
file << commands[i] << endl;
}
file.close();
}
vector<Relation> DBEngine::getRelations(){
return tables;
}
Relation& DBEngine::getTableFromName(string n){
for(int i = 0; i < tables.size(); i++){
if (tables[i].getTableName() == n){
@ -38,19 +53,6 @@ Relation& DBEngine::getTableFromName(string n){
}
}
//currently writes nothing meaningful
void DBEngine::saveToFile(vector<string> cmds){
ofstream file;
file.open("savefile.db");
for(int i = 0; i < cmds.size(); ++i){
file << cmds[i] << endl;
}
file.close();
}
Relation DBEngine::selection(string attName, string s, Relation r){
equality(attName, s, r);
}
@ -78,7 +80,6 @@ Relation DBEngine::product(string new_name, Relation r1, Relation r2){
Relation temp(new_name);
vector<Attribute> a1;
for(int i = 0; i < r1.getAttributes().size(); ++i){
a1.push_back(r1.getAttributes()[i]);
}
@ -93,20 +94,6 @@ Relation DBEngine::product(string new_name, Relation r1, Relation r2){
vector<string> tuple2;
vector<string> result_tuple;
//Don't we need to find the bigger one to start first?
if(r1.getSize() >= r2.getSize())
{
//Combine tuples from relations into one, push back that tuple into the resultant relation via insertTuple
//Yeah have fun
}
else if(r2.getSize() > r1.getSize())
{
//
}
return temp;
}
@ -129,6 +116,8 @@ void DBEngine::rename(Relation& r, vector<string> oldnames, vector<string> newna
}
}
/*Relation DBEngine::setUnion(Relation r1, Relation r2){
if (r1.getAttributeNames() != r2.getAttributeNames()){
cout << "Failure to union: the relations are not union-compatible";