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updates

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This commit is contained in:
Rebecca Schofield 2015-09-22 21:17:45 -05:00
parent db10f42803
commit 97eaea15f2
4 changed files with 2 additions and 265 deletions
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1
Attribute.cpp
View file

@ -45,7 +45,6 @@ bool Attribute::isKey(){
return key; return key;
} }
//may need to change primary key implementation
int Attribute::getSize(){ int Attribute::getSize(){
return size; return size;
} }

2
DBEngine.cpp
View file

@ -59,7 +59,7 @@ Relation DBEngine::projection(vector<string> input, Relation r){
// } // }
} }
//TEST ERRORS MATCHING //test error matching
void DBEngine::rename(Relation& r, vector<string> oldnames, vector<string> newnames){ void DBEngine::rename(Relation& r, vector<string> oldnames, vector<string> newnames){
if (oldnames.size() != newnames.size()) { if (oldnames.size() != newnames.size()) {
cout << "Failure to rename: number of attributes do not match."; cout << "Failure to rename: number of attributes do not match.";

262
Parserv2.cpp
View file

@ -1,262 +0,0 @@
#include <string> // std::string
#include <iostream> // std::cout
#include <sstream> // std::stringstream
#include <vector>
#include <string>
using namespace std;
vector<string> tokenize(string ss)
{
string tempString;
stringstream lineStream(ss);
vector<string> output;
while (lineStream >> tempString)
{
output.push_back(tempString);
}
//testing---------------
cout<<"TokenList: ";
for (int i = 0; i <output.size(); ++i)
{
cout<<output[i]<<" ";
}
//----------------------
return output;
}
// void par_select(vector<string> input)
// {
// // if (input[0] != "(")
// // {
// // cout<<"ERROR! missing parenthesis"<<endl;
// // }
// // else
// // {
// // input.erase(input.begin());
// // }
// cout<<"par_select function was called!"<<endl;
// }
void displayTokenList(vector<string> input)
{
cout<<"TokenList: "<<endl;
for (int i = 0; i < input.size(); ++i)
{
cout<<input[i]<<endl;
}
}
vector<string> insertCMD(vector<string> input)
{
//relation name will be the first element of the vector of data returned by this function
vector<string> output;
if (input[0] == "INTO")
{
input.erase(input.begin());
output.push_back(input[0]); //pushing relation name
input.erase(input.begin());
if (input[0] == "VALUES" && input[1] == "FROM")
{
input.erase(input.begin());
input.erase(input.begin());
if(input[0] == "(")
{
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());
output.push_back(input[0]);
input.erase(input.begin());
}
return output;
}
else cout<<"Syntax error!"<<endl;
}
else cout<<"Syntax error!"<<endl;
}
else cout<<"Syntax error!"<<endl;
}
vector<string> createCMD(vector<string> input)
{
//relation name will be the first element of the vector of data returned by this function
// vector<string> output;
// output.push_back(input[0]) //pushing relation name
// if (input[0] == "VALUES" && input[1] == "FROM")
// {
// input.erase(input.begin());
// input.erase(input.begin());
// if(input[0] == "(")
// {
// 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());
// output.push_back(input[0]);
// input.erase(input.begin());
// }
// return output;
// }
// else cout<<"Syntax error!"<<endl;
// }
// else cout<<"Syntax error!"<<endl;
}
void par_line(vector<string> input) //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.
• Call functions par_command() or par_query();
• After either par_command() or par_query() returns, make sure the line ends properly with “;” token
*/
string tempChar = input.back();
if (tempChar != ";")
{
cout<<"ERROR! missing semicolon "<<endl;
}
else
{
//command
// if ( input[0] == "open-cmd" || input[0] == "close-cmd" ||
// input[0] == "save-cmd" || input[0] == "exit-cmd" ||
// input[0] == "show-cmd" || input[0] == "create-cmd" ||
// input[0] == "update-cmd" || input[0] == "insert-cmd" ||
// input[0] == "delete-cmd" )
// {
// par_command(input[0]);
// }
//query
// if ( input[0] == "select" || input[0] == "project" ||
// input[0] == "product" || input[0] == "difference" ||
// input[0] == "union" || input[0] == "renaming" ||
// input[0] == "update-cmd" || input[0] == "insert-cmd" ||
// input[0] == "delete-cmd" )
// {
// par_query(input[0]);
// }
if ( input[0] == "INSERT")
{
cout<<"\nPassing the following arguments to dbEngine: \nCommand: "<<input[0]<<endl;
input.erase(input.begin());
vector<string> insertInput = insertCMD(input);
cout<<"arguments: "<<endl;
displayTokenList(insertInput);
}
if ( input[0] == "CREATE")
{
cout<<"\nPassing the following arguments to dbEngine: \nCommand: "<<input[0]<<endl;
input.erase(input.begin());
input.erase(input.begin());
vector<string> insertInput = insertCMD(input);
cout<<"arguments: "<<endl;
displayTokenList(insertInput);
}
}
}
// void par_command(string ss)
// {
// }
// void par_query(string ss);
// {
// if (input[0] == "select");
// }
// void par_insert();
// void par_relationName();
// void par_literals();
// void par_condition();
// void par_conjuction();
// void par_automicexpr():
// /*
// • try to match the current pointer in the token list with the atomic-expr grammar.
// • If an Expr is identified, call par_expr() grammar function
// */
// void par_expr():
// /*
// try to match the current pointer in the token list with the expr grammar.
// Check the current token and identify a proper query (e.g., if project-query is identified, call par_project() grammer function).
// */
// void par_projection():
// /*try to match the current pointer in the token list with the projection grammar
// ◦ Call grammar function par_attribute_list
// ◦ (later on, return a View after the evaluation)
// */
int main () {
string ss = "INSERT INTO animals VALUES FROM ( Joe , cat , 4 ) ;";
string ss2 = "CREATE TABLE animals ( name VARCHAR(20) , kind VARCHAR(8) , years INTEGER ) PRIMARY KEY (name, kind);";
vector<string> listOfTokens = tokenize(ss);
par_line(listOfTokens);
}

2
Relation.h
View file

@ -17,7 +17,7 @@ public:
void renameAttribute(string oldstr, string newstr); void renameAttribute(string oldstr, string newstr);
int getSize(); int getSize();
void display(); void display();
void insertTuple(vector<string> tuple); //we are assuming they are in order void insertTuple(vector<string> tuple); //assuming they are in order
void insertFromRelation(Relation r); void insertFromRelation(Relation r);
//void removeTuple(); //void removeTuple();
}; };