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cross product done

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This commit is contained in:
Rebecca Schofield 2015-09-28 16:03:41 -05:00
parent c3d39eedbd
commit 96eb1a28c0
2 changed files with 7 additions and 14 deletions
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21
DBEngine.cpp
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@ -212,32 +212,25 @@ Relation DBEngine::crossProduct(Relation r1, Relation r2){
new_atts[i].clearAllValues(); new_atts[i].clearAllValues();
} }
//currently all returned relations are called TEMP
Relation new_r("TEMP", new_atts);
vector<string> r1_tuple; vector<string> r1_tuple;
vector<string> r2_tuple; vector<string> r2_tuple;
vector<string> temp;
for (int i = 0; i < r1_attsize; ++i) { for (int i = 0; i < r1_attsize; ++i) {
r1_tuple = r1.getTuple(i); r1_tuple = r1.getTuple(i);
for (int a = 0; a < r1_tuple.size(); ++a) {
cout << r1_tuple[a] << " ";
}
for (int j = 0; j < r2_attsize; ++j) { for (int j = 0; j < r2_attsize; ++j) {
r2_tuple = r2.getTuple(j); r2_tuple = r2.getTuple(j);
temp = r1_tuple;
temp.insert(temp.end(), r2_tuple.begin(), r2_tuple.end());
for (int b = 0; b < r2_tuple.size(); ++b){ new_r.insertTuple(temp);
cout << r2_tuple[b] << " ";
} }
cout << "\n";
} }
cout << "\n\n";
}
//currently all returned relations are called TEMP
Relation new_r("TEMP", new_atts);
return new_r; return new_r;
} }

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