31 lines
881 B
C++
Executable file
31 lines
881 B
C++
Executable file
#pragma once
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#include <fstream>
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#include <iostream>
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#include <vector>
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#include "Relation.h"
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//still in progress
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class DBEngine{
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vector<Relation> tables;
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vector<string> commands;
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int size;
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public:
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DBEngine();
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void createTable(string n);
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void createTable(string n, vector<Attribute> a);
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void createTable(Relation r);
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vector<Relation> getRelations();
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//void showTable(Relation r);
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Relation& getTableFromName(string n);
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void saveToFile(vector<string> cmds);
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Relation selection(string attName, string s, Relation r);
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Relation projection(vector<string> input, Relation r);
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Relation product(string s1, Relation r1, Relation r2);
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void rename(Relation& r, vector<string> oldnames, vector<string> newnames);
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void save();
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void storeCommands(string s);
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Relation setUnion(Relation r1, Relation r2);
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//void setDiff();
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//void crossProduct();
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};
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