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Update DBEngine.cpp

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This commit is contained in:
Brandon Jackson 2015-09-24 20:55:14 -05:00
parent 3983003035
commit 7ac2d4474f
1 changed files with 11 additions and 4 deletions
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15
DBEngine.cpp
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@ -58,12 +58,19 @@ Relation DBEngine::selection(string attName, string s, Relation r){
//assumes that all attribute titles are unique //assumes that all attribute titles are unique
Relation DBEngine::projection(vector<string> input, Relation r){ Relation DBEngine::projection(vector<string> input, Relation r){
vector<Attribute> v;
string new_name = r.getTableName() + " Projection";
// for(int i = 0; i < input.size(); i++) { for(int i = 0; i < input.size(); ++i) {
// it = find(r.getAttributes().begin(), r.getAttributes().end(), input[i])
//if(r[i].getName == input[]) for(int j = 0; j < r.getSize(); ++j) {
// } if((r.getAttributes())[j].getName() == input[i])
v.push_back((r.getAttributes())[j]);
}
}
Relation temp(new_name, v);
return temp;
} }
//test error matching //test error matching