Added functionality of EXIT, SHOW, SAVE, INSERT, and CREATE commands through parser. Added some functions to help with that.

Attribute.cpp

@@ -16,6 +16,13 @@ Attribute::Attribute(string n, string t, bool k){
 	size = 0;
 }
 
+Attribute::Attribute(string n, string t, bool k, int s){ 
+	name = n;
+	type = t;
+	key = k;
+	size = s;
+}
+
 void Attribute::addCell(string v){
 	values.push_back(v);
 	size++;
@@ -56,7 +63,12 @@ int Attribute::getSize(){
 
 void Attribute::display(){
 	cout << "-------------\n";
-	cout << name << "\n" << type << "\n\n";
+	cout << name << "\n" << type;
+	if(type == "VARCHAR")
+	{
+		cout << "(" << size << ")";
+	}
+	cout << "\n\n";
 	
 	vector<string>::iterator it = values.begin();
 	while (it != values.end()){

Attribute.h

@@ -14,6 +14,7 @@ class Attribute{
 public:
 	Attribute();
 	Attribute(string n, string t, bool k);
+	Attribute(string n, string t, bool k, int s);
 	void addCell(string v);
 	void removeCell(int index);
 	string operator[](int i);

DBEngine.cpp

@@ -25,6 +25,17 @@ void DBEngine::createTable(Relation r){
 	size++;
 }
 
+void DBEngine::insertValues(string r, vector <string> v)
+{
+	for(int i = 0; i < tables.size(); i++)
+	{
+		if (tables[i].getTableName() == r)
+		{
+			tables[i].insertTuple(v);
+		}
+	}
+}
+
 void DBEngine::storeCommands(string s){
 	commands.push_back(s);
 }
@@ -51,23 +62,14 @@ Relation& DBEngine::getTableFromName(string n){
 			return tables[i];
 		}
 	}
+	cout << "No Relation with this name." << endl;
+	exit(1);
 }
 
 Relation DBEngine::selection(string attName, string s, Relation r){
 	equality(attName, s, r);
 }
 
-/*
-Relation DBEngine::selection(string attName, string s, Relation r){
-	equality(attName, s, r);
-}
-
-
-Relation DBEngine::selection(string attName, string s, Relation r){
-	equality(attName, s, r);
-}
-*/
-
 //assumes that all attribute titles are unique
 Relation DBEngine::projection(vector<string> input, Relation r){
 	

DBEngine.h

@@ -15,6 +15,7 @@ public:
 	void createTable(string n);
 	void createTable(string n, vector<Attribute> a);
 	void createTable(Relation r);
+	void insertValues(string r, vector <string> v);
 	vector<Relation> getRelations();
 	//void showTable(Relation r);
 	Relation& getTableFromName(string n);

Parserv3.h

@@ -36,6 +36,7 @@ class PAttribute
 {
 	string name;
 	string type;
+	bool key;
 	int size;
 	
 	public:
@@ -43,6 +44,7 @@ class PAttribute
 		{
 			name = "~";
 			type = "~";
+			key = false;
 			size = 0;
 		}
 		
@@ -50,6 +52,7 @@ class PAttribute
 		{
 			name = str;
 			type = t;
+			key = false;
 			size = 0;
 		}
 		
@@ -57,6 +60,7 @@ class PAttribute
 		{
 			name = str;
 			type = t;
+			key = false;
 			size = s;
 		}
 		
@@ -70,6 +74,11 @@ class PAttribute
 			type = t;
 		}
 		
+		void setPAttributeKey()
+		{
+			key = true;
+		}
+		
 		void setPAttributeSize(int s)
 		{
 			size = s;
@@ -79,6 +88,21 @@ class PAttribute
 		{
 			return name;
 		}
+		
+		string getPAttributeType()
+		{
+			return type;
+		}
+		
+		bool getPAttributeKey()
+		{
+			return key;
+		}
+		
+		int getPAttributeSize()
+		{
+			return size;
+		}
 };
 
 class PUnion

Parserv4.cpp

@@ -1,5 +1,6 @@
 #include <string>       // std::string
 #include <iostream>     // std::cout
+#include <fstream>		// std::ofstream
 #include <sstream>      // std::stringstream
 #include <vector>
 #include <string>
@@ -25,6 +26,7 @@ vector<string> tokenize(string ss)
 	{
 		cout<<output[i]<<"  ";
 	}
+	cout << endl;
 	//----------------------
 	
 	return output;
@@ -39,7 +41,7 @@ void displayTokenList(vector<string> input)
 	}
 }
 
-vector<string> showCMD(vector<string> input)
+vector<string> showCMD(vector<string> input, DBEngine &engine)
 {
 	if (input.size() > 3)
 	{
@@ -49,25 +51,58 @@ vector<string> showCMD(vector<string> input)
 	PRelation r(input[0]);
 	
 	// send show command to DBEngine
+	engine.getTableFromName(r.getName()).display();
 	
 	return input;
 }
 
-vector<string> saveCMD(vector<string> input)
+vector<string> saveCMD(vector<string> input, DBEngine &engine)
 {
-	if (input.size() > 3)
+	if (input.size() > 2)
 	{
 		cout<<"Syntax error!"<<endl;
 	}
 	
-	PRelation r(input[0]);
+	//PRelation pr(input[0]);
 	
 	// send save command to DBEngine
+	//engine.save();
+	
+	Relation r = engine.getTableFromName(input[0]);
+	ofstream output;
+	string name = r.getTableName() + ".txt";
+	output.open(name);
+	
+	output << "--------------------------\n";
+	output << r.getTableName() << "\n\n";
+	vector <Attribute> att = r.getAttributes();
+	for (int i = 0; i < att.size(); ++i)
+	{
+		output << "-------------\n";
+		output << att[i].getName() << "\n" << att[i].getType();
+		if(att[i].getType() == "VARCHAR")
+		{
+			output << "(" << att[i].getSize() << ")";
+		}
+		output << "\n\n";
+		
+		vector<string> values = att[i].getValues();
+		vector<string>::iterator it = values.begin();
+		while (it != values.end())
+		{
+			output << *it << "\n";
+			it++;
+		}
+		output << "-------------\n";
+	}
+	output << "\n--------------------------";
+	
+	input.erase(input.begin());
 	
 	return input;
 }
 
-vector<string> closeCMD(vector<string> input)
+vector<string> closeCMD(vector<string> input, DBEngine &engine)
 {
 	if (input.size() > 3)
 	{
@@ -81,7 +116,7 @@ vector<string> closeCMD(vector<string> input)
 	return input;
 }
 
-vector<string> openCMD(vector<string> input)
+vector<string> openCMD(vector<string> input, DBEngine &engine)
 {
 	if (input.size() > 2)
 	{
@@ -95,28 +130,22 @@ vector<string> openCMD(vector<string> input)
 	return input;
 }
 
-vector<string> exitCMD(vector<string> input)
+vector<string> exitCMD(vector<string> input, DBEngine &engine)
 {
-	if (input[1] != ";")
-	{
-		cout<<"ERROR: missing semicolon!"<<endl;
-	}
 	
-	if (input[0] != "EXIT") { cout<<"Wrong function/syntax error!"<<endl;}
+	exit(0);
-	cout<<"Passing command: "<<input[0]<<endl;
 	
 	return input;
 }
 
 
-vector<string> createCMD(vector<string> input)
+vector<string> createCMD(vector<string> input, DBEngine &engine)
 {
 	//relation name will be the first element of the vector of data returned by this function
 	
-	if (input[0] == "CREATE" && input[1] == "TABLE")
+	if (input[0] == "TABLE")
 	{
 		input.erase(input.begin());
-		input.erase(input.begin());
 		
 		PRelation r;
 		r.setPRelation(input[0]);
@@ -152,14 +181,14 @@ vector<string> createCMD(vector<string> input)
 				else
 				{
 					temp.setPAttributeType(input[0].substr(0,input[0].find("("))); 
-					temp.setPAttributeSize(stoi(input[0].substr(input[0].find("("), input[0].find(")"))));
+					temp.setPAttributeSize(stoi(input[0].substr(input[0].find("(") + 1, input[0].find(")"))));
 					input.erase(input.begin());	
 				}
 				
 				a.push_back(temp);
 			}
 			
-			vector <PAttribute> apk; //save primary keys temp storage
+			//vector <PAttribute> apk; //save primary keys temp storage
 			
 			if(input[0] == "PRIMARY" && input[1] == "KEY")
 			{
@@ -171,34 +200,50 @@ vector<string> createCMD(vector<string> input)
 				
 					while(input[0] != ")")	//inserting all values to relation
 					{
-						PAttribute temp;
+						//PAttribute temp;
 						
 						if (input[0] == ",")
 						{
 							input.erase(input.begin());
 						}
 						
-						temp.setPAttributeName(input[0]);
+						//temp.setPAttributeName(input[0]);
 						
-						apk.push_back(temp);
+						//apk.push_back(temp);
+						
+						for(int i = 0; i < a.size(); ++i)
+						{
+							if(input[0] == a[i].getPAttribute())
+							{
+								a[i].setPAttributeKey();
+							}
+						}
 						
 						input.erase(input.begin());
 					}
+				}
+			}
 			
+			vector <Attribute> dba;
 			
+			for(int x = 0; x < a.size(); ++x)
+			{
+				Attribute temp(a[x].getPAttribute(), a[x].getPAttributeType(), a[x].getPAttributeKey(), a[x].getPAttributeSize());
+				dba.push_back(temp);
+			}
+			
+			engine.createTable(r.getName(), dba);
 			
 			return input;
 		}
-			}
-		}
 			
-		else cout<<"Syntax error!"<<endl;
+		else cout<<"Syntax error! 2"<<endl;
 	}
-	else cout<<"Syntax error!"<<endl;
+	else cout<<"Syntax error! 1"<<endl;
 	
 }
 
-vector<string> insertCMD(vector<string> input)
+vector<string> insertCMD(vector<string> input, DBEngine &engine)
 {
 	//relation name will be the first element of the vector of data returned by this function
 		
@@ -206,7 +251,8 @@ vector<string> insertCMD(vector<string> input)
 	{
 		input.erase(input.begin());
 		
-		PRelation r(input[0]);
+		PRelation pr(input[0]);
+		Relation r = engine.getTableFromName(input[0]);
 		
 		input.erase(input.begin());
 		
@@ -218,65 +264,115 @@ vector<string> insertCMD(vector<string> input)
 			input.erase(input.begin());
 			
 			
+			vector <Attribute> a = r.getAttributes();
+			
 			if(input[0] == "(")
+			{
+				input.erase(input.begin());
+				
+				for(int i = 0; i < a.size(); ++i)
+				{
+					if(a[i].getType() == "INTEGER")
 					{
 						if(input[0].at(0) == '\"')
 						{
-					s.push_back(input[0].substr(1,input[0].find_last_of("\"")));
+							cout << "Incorrect type matching. Tried to insert string." << endl;
-				}
+							cout << "The values should be: ";
-				vector <PExpression> e;
+							for(int x = 0; x < a.size(); ++i)
-				input.erase(input.begin());
-				
-				while(input[0] != ")")	//inserting all values to relation
-				//for (int i = 0; i < 2; ++i)
 							{
-					if (input[0] == ",") input.erase(input.begin());
+								cout << a[x].getType();
-					
+								if(a[x].getType() == "VARCHAR")
-					e.push_back(input[0]);
+								{
-					
+									cout << "(" << a[x].getSize() << ")";
+								}
+								cout << endl;
+							}
+							exit(1);
+						}
+						s.push_back(input[0]);
 						input.erase(input.begin());
 					}
 					
-				cout << "Inserting: ";
+					else
-				while(!e.empty())
 					{
-					cout << e[0].getPExpression() << " ";
+						if(input[0].at(0) == '\"')
-					e.erase(e.begin());
+						{
+							s.push_back(input[0].substr(1,input[0].find_last_of("\"") - 1 ));
+							//engine.getTableFromName(pr.getName()).getAttributes()[i].display();
+							input.erase(input.begin());
+						}
+						else
+						{
+							cout << "Incorrect type matching. Tried to insert integer." << endl;
+							cout << "The values should be: ";
+							for(int x = 0; x < a.size(); ++x)
+							{
+								cout << a[x].getType();
+								if(a[x].getType() == "VARCHAR")
+								{
+									cout << "(" << a[x].getSize() << ")";
+								}
+								cout << endl;
+							}
+							exit(1);
+						}
 					}
-				cout << "into " << r.getName() << ".\n";
 					
+					if (input[0] == ",") 
+					{
+						input.erase(input.begin());
+					}
+				}
+				if(input[0] != ")")
+				{
+					cout << "Too many values trying to be inserted. Only insert " << a.size() << " values.";
+					cout << "The values should be: ";
+					for(int x = 0; x < a.size(); ++x)
+					{
+						cout << a[x].getType();
+						if(a[x].getType() == "VARCHAR")
+						{
+							cout << "(" << a[x].getSize() << ")";
+						}
+						cout << endl;
+					}
+					exit(1);
+				}
+				engine.insertValues(r.getTableName(), s);
+				input.erase(input.begin());
 				return input;
-				
 			}
 			
 			else if (input[0] == "RELATION")
 			{
 				input.erase(input.begin());
 				
-				PExpression e;
+				//PExpression e;
 				
-				while(input[0] != ";")
+				// while(input[0] != ";")
-				{
+				// {
-					e.setPExpression(e.getPExpression() + input[0]);
+					// e.setPExpression(e.getPExpression() + input[0]);
-				}
+				// }
 				
-				cout << "Inserting: " << e.getPExpression() << " into " << r.getName() << ".\n";
+				//cout << "Inserting: " << e.getPExpression() << " into " << r.getName() << ".\n";
+				
+				cout << "Not yet implemented." << endl;
 				
 				return input;
 			}
 			
-			else cout<<"Syntax error!"<<endl;
+			else cout<<"Syntax error! 3"<<endl;
 		}
 		
-		cout<<"Syntax error!"<<endl;
+		cout<<"Syntax error! 2"<<endl;
 		
 	}
 	
-	else cout<<"Syntax error!"<<endl;
+	else cout<<"Syntax error! 1"<<endl;
 	
 }
 
-vector<string> updateCMD(vector<string> input)
+vector<string> updateCMD(vector<string> input, DBEngine &engine)
 {
 	PRelation r(input[0]);
 	
@@ -316,7 +412,7 @@ vector<string> updateCMD(vector<string> input)
 				
 				else
 				{
-					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 () {

savefile.txt

@@ -1,3 +1,3 @@
-INSERT INTO animals VALUES FROM  ( Joe , cat , 4 ) ;
+SHOW Food ;
-SHOW Dogs ;
+SHOW MoarFood ;
-EXIT ; 
+SAVE ;

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(ss, engine);
-	parse(ss2, engine);
+	// parse(ss2, engine);
-	parse(ss3, 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: ";
+	}
 }