Added functionality of EXIT, SHOW, SAVE, INSERT, and CREATE commands through parser. Added some functions to help with that.
This commit is contained in:
Alexander Huddleston
parent
e244c6ca45
commit
851821750c
9 changed files with 249 additions and 94 deletions
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@ -16,6 +16,13 @@ Attribute::Attribute(string n, string t, bool k){
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size = 0;
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}
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Attribute::Attribute(string n, string t, bool k, int s){
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name = n;
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type = t;
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key = k;
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size = s;
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}
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void Attribute::addCell(string v){
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values.push_back(v);
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size++;
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@ -56,7 +63,12 @@ int Attribute::getSize(){
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void Attribute::display(){
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cout << "-------------\n";
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cout << name << "\n" << type << "\n\n";
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cout << name << "\n" << type;
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if(type == "VARCHAR")
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{
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cout << "(" << size << ")";
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}
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cout << "\n\n";
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vector<string>::iterator it = values.begin();
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while (it != values.end()){
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@ -14,6 +14,7 @@ class Attribute{
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public:
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Attribute();
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Attribute(string n, string t, bool k);
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Attribute(string n, string t, bool k, int s);
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void addCell(string v);
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void removeCell(int index);
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string operator[](int i);
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24
DBEngine.cpp
24
DBEngine.cpp
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@ -25,6 +25,17 @@ void DBEngine::createTable(Relation r){
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size++;
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}
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void DBEngine::insertValues(string r, vector <string> v)
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{
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for(int i = 0; i < tables.size(); i++)
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{
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if (tables[i].getTableName() == r)
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{
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tables[i].insertTuple(v);
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}
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}
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}
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void DBEngine::storeCommands(string s){
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commands.push_back(s);
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}
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@ -51,23 +62,14 @@ Relation& DBEngine::getTableFromName(string n){
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return tables[i];
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}
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}
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cout << "No Relation with this name." << endl;
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exit(1);
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}
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Relation DBEngine::selection(string attName, string s, Relation r){
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equality(attName, s, r);
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}
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/*
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Relation DBEngine::selection(string attName, string s, Relation r){
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equality(attName, s, r);
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}
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Relation DBEngine::selection(string attName, string s, Relation r){
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equality(attName, s, r);
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}
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*/
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//assumes that all attribute titles are unique
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Relation DBEngine::projection(vector<string> input, Relation r){
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@ -15,6 +15,7 @@ public:
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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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void insertValues(string r, vector <string> v);
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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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24
Parserv3.h
24
Parserv3.h
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@ -36,6 +36,7 @@ class PAttribute
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{
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string name;
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string type;
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bool key;
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int size;
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public:
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@ -43,6 +44,7 @@ class PAttribute
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{
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name = "~";
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type = "~";
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key = false;
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size = 0;
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}
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@ -50,6 +52,7 @@ class PAttribute
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{
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name = str;
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type = t;
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key = false;
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size = 0;
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}
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@ -57,6 +60,7 @@ class PAttribute
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{
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name = str;
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type = t;
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key = false;
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size = s;
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}
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@ -70,6 +74,11 @@ class PAttribute
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type = t;
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}
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void setPAttributeKey()
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{
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key = true;
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}
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void setPAttributeSize(int s)
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{
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size = s;
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@ -79,6 +88,21 @@ class PAttribute
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{
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return name;
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}
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string getPAttributeType()
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{
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return type;
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}
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bool getPAttributeKey()
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{
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return key;
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}
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int getPAttributeSize()
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{
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return size;
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}
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};
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class PUnion
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248
Parserv4.cpp
248
Parserv4.cpp
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@ -1,5 +1,6 @@
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#include <string> // std::string
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#include <iostream> // std::cout
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#include <fstream> // std::ofstream
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#include <sstream> // std::stringstream
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#include <vector>
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#include <string>
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@ -25,6 +26,7 @@ vector<string> tokenize(string ss)
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{
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cout<<output[i]<<" ";
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}
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cout << endl;
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//----------------------
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return output;
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@ -39,7 +41,7 @@ void displayTokenList(vector<string> input)
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}
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}
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vector<string> showCMD(vector<string> input)
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vector<string> showCMD(vector<string> input, DBEngine &engine)
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{
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if (input.size() > 3)
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{
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@ -49,25 +51,58 @@ vector<string> showCMD(vector<string> input)
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PRelation r(input[0]);
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// send show command to DBEngine
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engine.getTableFromName(r.getName()).display();
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return input;
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}
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vector<string> saveCMD(vector<string> input)
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vector<string> saveCMD(vector<string> input, DBEngine &engine)
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{
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if (input.size() > 3)
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if (input.size() > 2)
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{
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cout<<"Syntax error!"<<endl;
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}
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PRelation r(input[0]);
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//PRelation pr(input[0]);
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// send save command to DBEngine
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//engine.save();
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Relation r = engine.getTableFromName(input[0]);
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ofstream output;
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string name = r.getTableName() + ".txt";
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output.open(name);
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output << "--------------------------\n";
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output << r.getTableName() << "\n\n";
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vector <Attribute> att = r.getAttributes();
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for (int i = 0; i < att.size(); ++i)
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{
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output << "-------------\n";
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output << att[i].getName() << "\n" << att[i].getType();
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if(att[i].getType() == "VARCHAR")
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{
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output << "(" << att[i].getSize() << ")";
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}
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output << "\n\n";
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vector<string> values = att[i].getValues();
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vector<string>::iterator it = values.begin();
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while (it != values.end())
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{
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output << *it << "\n";
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it++;
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}
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output << "-------------\n";
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}
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output << "\n--------------------------";
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input.erase(input.begin());
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return input;
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}
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vector<string> closeCMD(vector<string> input)
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vector<string> closeCMD(vector<string> input, DBEngine &engine)
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{
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if (input.size() > 3)
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{
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@ -81,7 +116,7 @@ vector<string> closeCMD(vector<string> input)
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return input;
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}
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vector<string> openCMD(vector<string> input)
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vector<string> openCMD(vector<string> input, DBEngine &engine)
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{
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if (input.size() > 2)
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{
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@ -95,28 +130,22 @@ vector<string> openCMD(vector<string> input)
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return input;
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}
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vector<string> exitCMD(vector<string> input)
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vector<string> exitCMD(vector<string> input, DBEngine &engine)
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{
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if (input[1] != ";")
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{
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cout<<"ERROR: missing semicolon!"<<endl;
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}
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if (input[0] != "EXIT") { cout<<"Wrong function/syntax error!"<<endl;}
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cout<<"Passing command: "<<input[0]<<endl;
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exit(0);
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return input;
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}
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vector<string> createCMD(vector<string> input)
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vector<string> createCMD(vector<string> input, DBEngine &engine)
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{
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//relation name will be the first element of the vector of data returned by this function
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if (input[0] == "CREATE" && input[1] == "TABLE")
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if (input[0] == "TABLE")
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{
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input.erase(input.begin());
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input.erase(input.begin());
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PRelation r;
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r.setPRelation(input[0]);
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@ -152,14 +181,14 @@ vector<string> createCMD(vector<string> input)
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else
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{
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temp.setPAttributeType(input[0].substr(0,input[0].find("(")));
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temp.setPAttributeSize(stoi(input[0].substr(input[0].find("("), input[0].find(")"))));
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temp.setPAttributeSize(stoi(input[0].substr(input[0].find("(") + 1, input[0].find(")"))));
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input.erase(input.begin());
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}
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a.push_back(temp);
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}
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vector <PAttribute> apk; //save primary keys temp storage
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//vector <PAttribute> apk; //save primary keys temp storage
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if(input[0] == "PRIMARY" && input[1] == "KEY")
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{
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@ -171,34 +200,50 @@ vector<string> createCMD(vector<string> input)
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while(input[0] != ")") //inserting all values to relation
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{
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PAttribute temp;
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//PAttribute temp;
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if (input[0] == ",")
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{
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input.erase(input.begin());
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}
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temp.setPAttributeName(input[0]);
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//temp.setPAttributeName(input[0]);
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apk.push_back(temp);
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//apk.push_back(temp);
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for(int i = 0; i < a.size(); ++i)
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{
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if(input[0] == a[i].getPAttribute())
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{
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a[i].setPAttributeKey();
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}
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}
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input.erase(input.begin());
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}
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return input;
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}
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}
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vector <Attribute> dba;
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for(int x = 0; x < a.size(); ++x)
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{
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Attribute temp(a[x].getPAttribute(), a[x].getPAttributeType(), a[x].getPAttributeKey(), a[x].getPAttributeSize());
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dba.push_back(temp);
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}
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engine.createTable(r.getName(), dba);
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return input;
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}
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else cout<<"Syntax error!"<<endl;
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else cout<<"Syntax error! 2"<<endl;
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}
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else cout<<"Syntax error!"<<endl;
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else cout<<"Syntax error! 1"<<endl;
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}
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vector<string> insertCMD(vector<string> input)
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vector<string> insertCMD(vector<string> input, DBEngine &engine)
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{
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//relation name will be the first element of the vector of data returned by this function
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@ -206,7 +251,8 @@ vector<string> insertCMD(vector<string> input)
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{
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input.erase(input.begin());
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PRelation r(input[0]);
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PRelation pr(input[0]);
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Relation r = engine.getTableFromName(input[0]);
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input.erase(input.begin());
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@ -218,65 +264,115 @@ vector<string> insertCMD(vector<string> input)
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input.erase(input.begin());
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vector <Attribute> a = r.getAttributes();
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if(input[0] == "(")
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{
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if(input[0].at(0) == '\"')
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{
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s.push_back(input[0].substr(1,input[0].find_last_of("\"")));
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}
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vector <PExpression> e;
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input.erase(input.begin());
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while(input[0] != ")") //inserting all values to relation
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//for (int i = 0; i < 2; ++i)
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for(int i = 0; i < a.size(); ++i)
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{
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if (input[0] == ",") input.erase(input.begin());
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if(a[i].getType() == "INTEGER")
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{
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if(input[0].at(0) == '\"')
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{
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cout << "Incorrect type matching. Tried to insert string." << endl;
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cout << "The values should be: ";
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for(int x = 0; x < a.size(); ++i)
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{
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cout << a[x].getType();
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if(a[x].getType() == "VARCHAR")
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{
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cout << "(" << a[x].getSize() << ")";
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}
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cout << endl;
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}
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exit(1);
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}
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s.push_back(input[0]);
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input.erase(input.begin());
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}
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e.push_back(input[0]);
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else
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{
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if(input[0].at(0) == '\"')
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{
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s.push_back(input[0].substr(1,input[0].find_last_of("\"") - 1 ));
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//engine.getTableFromName(pr.getName()).getAttributes()[i].display();
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input.erase(input.begin());
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}
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else
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{
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cout << "Incorrect type matching. Tried to insert integer." << endl;
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cout << "The values should be: ";
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for(int x = 0; x < a.size(); ++x)
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{
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cout << a[x].getType();
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if(a[x].getType() == "VARCHAR")
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{
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cout << "(" << a[x].getSize() << ")";
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}
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cout << endl;
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}
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exit(1);
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}
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}
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input.erase(input.begin());
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if (input[0] == ",")
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{
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input.erase(input.begin());
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}
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}
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cout << "Inserting: ";
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while(!e.empty())
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if(input[0] != ")")
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{
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cout << e[0].getPExpression() << " ";
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e.erase(e.begin());
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cout << "Too many values trying to be inserted. Only insert " << a.size() << " values.";
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cout << "The values should be: ";
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for(int x = 0; x < a.size(); ++x)
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{
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cout << a[x].getType();
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if(a[x].getType() == "VARCHAR")
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{
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cout << "(" << a[x].getSize() << ")";
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}
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cout << endl;
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}
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exit(1);
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}
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cout << "into " << r.getName() << ".\n";
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engine.insertValues(r.getTableName(), s);
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input.erase(input.begin());
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return input;
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}
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else if (input[0] == "RELATION")
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{
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input.erase(input.begin());
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PExpression e;
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//PExpression e;
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while(input[0] != ";")
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{
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e.setPExpression(e.getPExpression() + input[0]);
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}
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// while(input[0] != ";")
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// {
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// e.setPExpression(e.getPExpression() + input[0]);
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// }
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cout << "Inserting: " << e.getPExpression() << " into " << r.getName() << ".\n";
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//cout << "Inserting: " << e.getPExpression() << " into " << r.getName() << ".\n";
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cout << "Not yet implemented." << endl;
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return input;
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}
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else cout<<"Syntax error!"<<endl;
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else cout<<"Syntax error! 3"<<endl;
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}
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cout<<"Syntax error!"<<endl;
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cout<<"Syntax error! 2"<<endl;
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}
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else cout<<"Syntax error!"<<endl;
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else cout<<"Syntax error! 1"<<endl;
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}
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vector<string> updateCMD(vector<string> input)
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vector<string> updateCMD(vector<string> input, DBEngine &engine)
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{
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PRelation r(input[0]);
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@ -316,7 +412,7 @@ vector<string> updateCMD(vector<string> input)
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else
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{
|
||||
cout<<"Syntax error!"<<endl;
|
||||
cout<<"Syntax error! 2"<<endl;
|
||||
}
|
||||
|
||||
if(input[0] == ",")
|
||||
|
|
@ -356,10 +452,10 @@ vector<string> updateCMD(vector<string> input)
|
|||
// send update command to DBEngine
|
||||
}
|
||||
|
||||
else cout<<"Syntax error!"<<endl;
|
||||
else cout<<"Syntax error! 1"<<endl;
|
||||
}
|
||||
|
||||
vector<string> deleteCMD(vector<string> input)
|
||||
vector<string> deleteCMD(vector<string> input, DBEngine &engine)
|
||||
{
|
||||
if (input[0] == "DELETE" && input[1] == "FROM")
|
||||
{
|
||||
|
|
@ -400,7 +496,7 @@ vector<string> deleteCMD(vector<string> input)
|
|||
else cout<<"Syntax error!"<<endl;
|
||||
}
|
||||
|
||||
void par_line(vector<string> input) //calls par_command() or par_query() depending on first item from token list
|
||||
void par_line(vector<string> input, DBEngine &engine) //calls par_command() or par_query() depending on first item from token list
|
||||
{
|
||||
/*
|
||||
• Match the first item in the token list and determine weather this is a command or a query.
|
||||
|
|
@ -420,7 +516,7 @@ void par_line(vector<string> input) //calls par_command() or par_query() dependi
|
|||
{
|
||||
cout<<"\nPassing the following arguments to dbEngine: \nCommand: "<<input[0]<<endl;
|
||||
input.erase(input.begin());
|
||||
vector<string> insertInput = insertCMD(input);
|
||||
vector<string> insertInput = insertCMD(input, engine);
|
||||
cout<<"arguments: "<<endl;
|
||||
displayTokenList(insertInput);
|
||||
|
||||
|
|
@ -431,7 +527,7 @@ void par_line(vector<string> input) //calls par_command() or par_query() dependi
|
|||
cout<<"\nPassing the following arguments to dbEngine: \nCommand: "<<input[0]<<endl;
|
||||
input.erase(input.begin());
|
||||
|
||||
vector<string> insertInput = createCMD(input);
|
||||
vector<string> insertInput = createCMD(input, engine);
|
||||
cout<<"arguments: "<<endl;
|
||||
displayTokenList(insertInput);
|
||||
|
||||
|
|
@ -442,7 +538,7 @@ void par_line(vector<string> input) //calls par_command() or par_query() dependi
|
|||
cout<<"\nPassing the following arguments to dbEngine: \nCommand: "<<input[0]<<endl;
|
||||
input.erase(input.begin());
|
||||
|
||||
vector<string> insertInput = deleteCMD(input);
|
||||
vector<string> insertInput = deleteCMD(input, engine);
|
||||
cout<<"arguments: "<<endl;
|
||||
displayTokenList(insertInput);
|
||||
|
||||
|
|
@ -453,7 +549,7 @@ void par_line(vector<string> input) //calls par_command() or par_query() dependi
|
|||
cout<<"\nPassing the following arguments to dbEngine: \nCommand: "<<input[0]<<endl;
|
||||
input.erase(input.begin());
|
||||
|
||||
vector<string> insertInput = updateCMD(input);
|
||||
vector<string> insertInput = updateCMD(input, engine);
|
||||
cout<<"arguments: "<<endl;
|
||||
displayTokenList(insertInput);
|
||||
|
||||
|
|
@ -461,27 +557,37 @@ void par_line(vector<string> input) //calls par_command() or par_query() dependi
|
|||
|
||||
if ( input[0] == "SHOW")
|
||||
{
|
||||
showCMD(input);
|
||||
cout<<"\nPassing the following arguments to dbEngine: \nCommand: "<<input[0]<<endl;
|
||||
input.erase(input.begin());
|
||||
showCMD(input, engine);
|
||||
}
|
||||
|
||||
if ( input[0] == "EXIT")
|
||||
{
|
||||
exitCMD(input);
|
||||
cout<<"\nPassing the following arguments to dbEngine: \nCommand: "<<input[0]<<endl;
|
||||
input.erase(input.begin());
|
||||
exitCMD(input, engine);
|
||||
}
|
||||
|
||||
if ( input[0] == "OPEN")
|
||||
{
|
||||
openCMD(input);
|
||||
cout<<"\nPassing the following arguments to dbEngine: \nCommand: "<<input[0]<<endl;
|
||||
input.erase(input.begin());
|
||||
openCMD(input, engine);
|
||||
}
|
||||
|
||||
if ( input[0] == "SAVE")
|
||||
{
|
||||
saveCMD(input);
|
||||
cout<<"\nPassing the following arguments to dbEngine: \nCommand: "<<input[0]<<endl;
|
||||
input.erase(input.begin());
|
||||
saveCMD(input, engine);
|
||||
}
|
||||
|
||||
if ( input[0] == "CLOSE")
|
||||
{
|
||||
closeCMD(input);
|
||||
cout<<"\nPassing the following arguments to dbEngine: \nCommand: "<<input[0]<<endl;
|
||||
input.erase(input.begin());
|
||||
closeCMD(input, engine);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
@ -490,7 +596,7 @@ void parse(string input, DBEngine &engine)
|
|||
{
|
||||
engine.storeCommands(input);
|
||||
vector<string> listOfTokens = tokenize(input);
|
||||
par_line(listOfTokens);
|
||||
par_line(listOfTokens, engine);
|
||||
}
|
||||
/*
|
||||
int main () {
|
||||
|
|
|
|||
|
|
@ -1,3 +1,3 @@
|
|||
INSERT INTO animals VALUES FROM ( Joe , cat , 4 ) ;
|
||||
SHOW Dogs ;
|
||||
EXIT ;
|
||||
SHOW Food ;
|
||||
SHOW MoarFood ;
|
||||
SAVE ;
|
||||
|
|
|
|||
BIN
test
BIN
test
Binary file not shown.
25
test.cpp
25
test.cpp
|
|
@ -72,11 +72,11 @@ int main() {
|
|||
|
||||
*/
|
||||
int main () {
|
||||
|
||||
/*
|
||||
string ss = "INSERT INTO animals VALUES FROM ( Joe , cat , 4 ) ;";
|
||||
string ss2 = "SHOW Dogs ;";
|
||||
string ss3 = "EXIT ; ";
|
||||
|
||||
*/
|
||||
DBEngine engine;
|
||||
|
||||
// vector<string> listOfTokens = tokenize(ss);
|
||||
|
|
@ -87,11 +87,11 @@ int main () {
|
|||
// par_line(listOfTokens2);
|
||||
// par_line(listOfTokens3);
|
||||
|
||||
parse(ss, engine);
|
||||
parse(ss2, engine);
|
||||
parse(ss3, engine);
|
||||
// parse(ss, engine);
|
||||
// parse(ss2, engine);
|
||||
// parse(ss3, engine);
|
||||
|
||||
engine.save();
|
||||
// engine.save();
|
||||
|
||||
Attribute att1("Breakfast", "VARCHAR(20)", true);
|
||||
Attribute att2("Lunch", "VARCHAR(20)", false);
|
||||
|
|
@ -135,8 +135,17 @@ int main () {
|
|||
|
||||
engine.createTable("MoarFood", v2);
|
||||
|
||||
engine.getTableFromName("Food").display();
|
||||
engine.getTableFromName("MoarFood").display();
|
||||
|
||||
engine.setUnion(engine.getTableFromName("Food"), engine.getTableFromName("MoarFood")).display();
|
||||
|
||||
//engine.setUnion(engine.getTableFromName("Food"), engine.getTableFromName("MoarFood")).display();
|
||||
|
||||
string x;
|
||||
cout << "Enter DBMS Commands: ";
|
||||
while(getline(cin, x))
|
||||
{
|
||||
//cout << x << endl;
|
||||
parse(x, engine);
|
||||
cout << "Enter DBMS Commands: ";
|
||||
}
|
||||
}
|
||||
|
|
|
|||
Reference in a new issue