private static void Create(string query)
{
char[] separators = new char[] { ' ', ';' };
string[] queryList = query.Split(separators, StringSplitOptions.RemoveEmptyEntries);
if (queryList.Length == 2)
{
string databaseName = default(string);
databaseName = queryList[1];
if (!GetInstance().IsKeyword(databaseName))
{
Kernel.AddDBInstance(databaseName);
Console.WriteLine($"Database was created with name '{queryList[1]}'\n");
Kernel.OutDatabaseInfo();
}
else
{
Console.WriteLine($"\nERROR: Name of the database can't be a keyword\n");
}
}
else
{
Console.WriteLine($"\nERROR: Invalid numbers of variables\n");
}
}
private static void Select(string query)
{
char[] separator = new char[] { ' ' };
string[] temp = query.Split(separator, 2, StringSplitOptions.RemoveEmptyEntries);
if (temp.Length == 2 && query[query.Length - 1] == ')')
{
char[] s1 = new char[] { '(' };
string[] t1 = query.Split(s1, 2, StringSplitOptions.RemoveEmptyEntries);
char[] s2 = new char[] { ' ' };
string[] tempName = t1[0].Split(s2, StringSplitOptions.RemoveEmptyEntries);
char[] s3 = new char[] { ';', ')' };
string[] tempParams = t1[1].Split(s3, StringSplitOptions.RemoveEmptyEntries);
if (tempName.Length == 3)
{
string dbName = tempName[1];
string tableName = tempName[2];
for (int i = 0; i < tempParams.Length; i++)
{
string[] param = tempParams[i].Split(',');
if (param.Length == 6)
{
//if(SharedDataAccessMethods)
Kernel.AddDBInstance(dbName);
var inst = Kernel.GetInstance(dbName);
inst.AddTable(tableName);
int tableIndex = Kernel.GetInstance(dbName).indexOfTable(tableName);
Column buff = GetInstance().GetColumn(param);
inst.TablesDB[tableIndex].AddColumn(buff);
}
}
}
else
{
Console.WriteLine("\nERROR: Invalid numbers of variables in params\n");
}
}
else
{
Console.WriteLine($"\nERROR: Missed part of the command\n");
}
Kernel.OutDatabaseInfo();
}
static void CreateDatabase(string dbName)
{
try {
if (!Kernel.isDatabaseExists(dbName))
{
Kernel.AddDBInstance(dbName);
Interpreter.ConnectionString = dbName;
Console.WriteLine($"\nDatabase created with name '{dbName}'\n");
}
else
{
throw new Exception("\nERROR: Invalid database name. Some database have same name!\n");
}
}
catch (Exception e)
{
Console.WriteLine(e.Message);
}
}