void Open(const string& fileName);
bool Close();//数据库操作接口
template <typename... Args>
bool Excecute(const string& sqlStr, Args && ... args);//返回一个值，如执行简单的汇聚函数
template < typename R = sqlite_int64, typename... Args>
R ExecuteScalar(const string& sqlStr, Args&&... args);//查询接口
template <typename... Args>
std::shared_ptr<rapidjson::Document> Query(const string& query, Args&&... args);//事务
bool Begin();
bool RollBack();
bool Commit();

void Test()
{SmartDB db;db.Open("test.db");const string sqlcreat = "CREATE TABLE if not exists PersonTable(ID INTEGER NOT NULL, Name Text, Address BLOB);";if (!db.Excecute(sqlcreat))return;const string sqlinsert = "INSERT INTO PersonTable(ID, Name, Address) VALUES(?, ?, ?);";int id = 2;string name = "Peter";string city = "zhuhai";blob bl = { city.c_str(), city.length() + 1 };if (!db.Excecute(sqlinsert, id, "Peter", nullptr))return;
}

template<typename Tuple>
bool ExcecuteTuple(const string& sqlStr, Tuple&& t);bool ExcecuteJson(const string& sqlStr, const char* json);

db.ExcecuteTuple(sqlinsert, std::forward_as_tuple(id, "Peter", bl));

void TestJson(SmartDB& db, const string& sqlinsert)
{rapidjson::StringBuffer buf;rapidjson::Writer<rapidjson::StringBuffer> writer(buf);writer.StartArray();for (size_t i = 0; i < 10; i++){writer.StartObject();writer.String("ID");writer.Int(i + 1);writer.String("Name");writer.String("Peter");writer.String("Address");writer.String("Zhuhai");writer.EndObject();}writer.EndArray();auto r = db.ExcecuteJson(sqlinsert, buf.GetString());
}

void TestJson(SmartDB& db, const string& sqlinsert)
{//这里通过jsoncpp封装类来简化json对象的创建
    JsonCpp jcp;jcp.StartArray();for (size_t i = 0; i < 10; i++){jcp.StartObject();jcp.WriteJson("ID", i);jcp.WriteJson("Name", "Peter");jcp.WriteJson("Address", "zhuhai");jcp.EndObject();}jcp.EndArray();auto r = db.ExcecuteJson(sqlinsert, buf.GetString());
}

auto p = db.Query("select * from TestInfoTable");

rapidjson::Document& doc = *p;for (size_t i = 0, len = doc.Size(); i < len; i++){for (size_t j = 0, size = doc[i].GetSize(); j < size; ++j){//doc[i][j];键值对
        }}const char* json = doc.GetString(); //返回json串

void TestPerformance()
{SmartDB db;db.Open("test.db");const string sqlcreat = "CREATE TABLE if not exists TestInfoTable(ID INTEGER NOT NULL, KPIID INTEGER, CODE INTEGER, V1 INTEGER, V2 INTEGER, V3 REAL, 

V4 TEXT);";if (!db.Excecute(sqlcreat))return;boost::timer t;const string sqlinsert = "INSERT INTO TestInfoTable(ID, KPIID, CODE, V1, V2, V3, V4) VALUES(?, ?, ?, ?, ?, ?, ?);";bool ret = db.Prepare(sqlinsert);db.Begin();for (size_t i = 0; i < 1000000; i++){ret = db.ExcecuteArgs(i, i, i, i, i, i + 1.25, "it is a test");if (!ret)break;}if (ret)db.Commit(); //提交事务elsedb.RollBack(); //回滚
cout << t.elapsed() << endl;t.restart();auto p = db.Query("select * from TestInfoTable");cout << t.elapsed() << endl;cout << "size: " << p->Size() << endl;
}