diff --git a/core/database/query_builder.cpp b/core/database/query_builder.cpp
index 3ddd69f..0b63ea7 100644
--- a/core/database/query_builder.cpp
+++ b/core/database/query_builder.cpp
@@ -40,30 +40,30 @@ QueryBuilder *QueryBuilder::like() {
 	return this;
 }
 
-QueryBuilder *QueryBuilder::select(const std::string &params) {
+QueryBuilder *QueryBuilder::select(const String &params) {
 	return nselect(escape(params));
 }
-QueryBuilder *QueryBuilder::update(const std::string &params) {
+QueryBuilder *QueryBuilder::update(const String &params) {
 	return nupdate(escape(params));
 }
-QueryBuilder *QueryBuilder::del(const std::string &params) {
+QueryBuilder *QueryBuilder::del(const String &params) {
 	return ndel(escape(params));
 }
-QueryBuilder *QueryBuilder::where(const std::string &params) {
+QueryBuilder *QueryBuilder::where(const String &params) {
 	return nwhere(escape(params));
 }
 
-QueryBuilder *QueryBuilder::from(const std::string &params) {
+QueryBuilder *QueryBuilder::from(const String &params) {
 	return nfrom(escape(params));
 }
 
-QueryBuilder *QueryBuilder::insert(const std::string &table_name) {
+QueryBuilder *QueryBuilder::insert(const String &table_name) {
 	return this;
 }
-QueryBuilder *QueryBuilder::insert(const std::string &table_name, const std::string &columns) {
+QueryBuilder *QueryBuilder::insert(const String &table_name, const String &columns) {
 	return this;
 }
-QueryBuilder *QueryBuilder::values(const std::string &params_str) {
+QueryBuilder *QueryBuilder::values(const String &params_str) {
 	return nvalues(escape(params_str));
 }
 
@@ -71,7 +71,7 @@ QueryBuilder *QueryBuilder::val() {
 	return this;
 }
 
-QueryBuilder *QueryBuilder::val(const std::string &param) {
+QueryBuilder *QueryBuilder::val(const String &param) {
 	return nval(escape(param));
 }
 
@@ -86,7 +86,7 @@ QueryBuilder *QueryBuilder::val(const bool param) {
 	return this;
 }
 
-QueryBuilder *QueryBuilder::like(const std::string &str) {
+QueryBuilder *QueryBuilder::like(const String &str) {
 	return nlike(escape(str));
 }
 
@@ -96,63 +96,63 @@ QueryBuilder *QueryBuilder::set() {
 QueryBuilder *QueryBuilder::cset() {
 	return this;
 }
-QueryBuilder *QueryBuilder::setp(const std::string &col, const std::string &param) {
+QueryBuilder *QueryBuilder::setp(const String &col, const String &param) {
 	return nsetp(col, escape(param));
 }
-QueryBuilder *QueryBuilder::setp(const std::string &col, const char *param) {
+QueryBuilder *QueryBuilder::setp(const String &col, const char *param) {
 	return this;
 }
-QueryBuilder *QueryBuilder::setp(const std::string &col, const int param) {
+QueryBuilder *QueryBuilder::setp(const String &col, const int param) {
 	return this;
 }
-QueryBuilder *QueryBuilder::setp(const std::string &col, const bool param) {
+QueryBuilder *QueryBuilder::setp(const String &col, const bool param) {
 	return this;
 }
 
-QueryBuilder *QueryBuilder::wp(const std::string &col, const std::string &param) {
+QueryBuilder *QueryBuilder::wp(const String &col, const String &param) {
 	return nwp(col, escape(param));
 }
-QueryBuilder *QueryBuilder::wp(const std::string &col, const char *param) {
+QueryBuilder *QueryBuilder::wp(const String &col, const char *param) {
 	return this;
 }
-QueryBuilder *QueryBuilder::wp(const std::string &col, const int param) {
+QueryBuilder *QueryBuilder::wp(const String &col, const int param) {
 	return this;
 }
-QueryBuilder *QueryBuilder::wp(const std::string &col, const bool param) {
+QueryBuilder *QueryBuilder::wp(const String &col, const bool param) {
 	return this;
 }
 
-QueryBuilder *QueryBuilder::nselect(const std::string &params) {
+QueryBuilder *QueryBuilder::nselect(const String &params) {
 	return this;
 }
-QueryBuilder *QueryBuilder::nupdate(const std::string &params) {
+QueryBuilder *QueryBuilder::nupdate(const String &params) {
 	return this;
 }
-QueryBuilder *QueryBuilder::ndel(const std::string &params) {
+QueryBuilder *QueryBuilder::ndel(const String &params) {
 	return this;
 }
 
-QueryBuilder *QueryBuilder::nwhere(const std::string &params) {
+QueryBuilder *QueryBuilder::nwhere(const String &params) {
 	return this;
 }
-QueryBuilder *QueryBuilder::nfrom(const std::string &params) {
+QueryBuilder *QueryBuilder::nfrom(const String &params) {
 	return this;
 }
-QueryBuilder *QueryBuilder::nlike(const std::string &str) {
+QueryBuilder *QueryBuilder::nlike(const String &str) {
 	return this;
 }
-QueryBuilder *QueryBuilder::nvalues(const std::string &params_str) {
+QueryBuilder *QueryBuilder::nvalues(const String &params_str) {
 	return this;
 }
 
-QueryBuilder *QueryBuilder::nval(const std::string &param) {
+QueryBuilder *QueryBuilder::nval(const String &param) {
 	return val(escape(param));
 }
-QueryBuilder *QueryBuilder::nsetp(const std::string &col, const std::string &escape_param) {
+QueryBuilder *QueryBuilder::nsetp(const String &col, const String &escape_param) {
 	return setp(col, escape(escape_param));
 }
 
-QueryBuilder *QueryBuilder::nwp(const std::string &col, const std::string &escape_param) {
+QueryBuilder *QueryBuilder::nwp(const String &col, const String &escape_param) {
 	return this;
 }
 
@@ -175,12 +175,12 @@ QueryBuilder *QueryBuilder::wildcard() {
 	return this;
 }
 
-QueryBuilder *QueryBuilder::w(const std::string &str) {
+QueryBuilder *QueryBuilder::w(const String &str) {
 	query_result += str + " ";
 
 	return this;
 }
-QueryBuilder *QueryBuilder::ew(const std::string &str) {
+QueryBuilder *QueryBuilder::ew(const String &str) {
 	return w(escape(str));
 }
 
@@ -188,14 +188,14 @@ QueryBuilder *QueryBuilder::select_last_insert_id() {
 	return this;
 }
 
-std::string QueryBuilder::escape(const std::string &params) {
+String QueryBuilder::escape(const String &params) {
 	return params;
 }
 
 QueryBuilder *QueryBuilder::prepare() {
 	return this;
 }
-QueryBuilder *QueryBuilder::set_param(const int index, const std::string &value) {
+QueryBuilder *QueryBuilder::set_param(const int index, const String &value) {
 	return this;
 }
 QueryBuilder *QueryBuilder::set_param(const int index, const int value) {
@@ -221,7 +221,7 @@ Ref<QueryResult> QueryBuilder::run() {
 void QueryBuilder::run_query() {
 }
 
-std::string QueryBuilder::get_result() {
+String QueryBuilder::get_result() {
 	end_command();
 
 	return query_result;
diff --git a/core/database/query_builder.h b/core/database/query_builder.h
index 34b30b0..97a6386 100644
--- a/core/database/query_builder.h
+++ b/core/database/query_builder.h
@@ -1,7 +1,7 @@
 #ifndef QUERY_BUILDER_H
 #define QUERY_BUILDER_H
 
-#include <string>
+#include "core/string.h"
 
 #include "core/reference.h"
 
@@ -26,49 +26,49 @@ public:
 
 	virtual QueryBuilder *like();
 
-	virtual QueryBuilder *select(const std::string &params);
-	virtual QueryBuilder *update(const std::string &params);
-	virtual QueryBuilder *del(const std::string &params);
+	virtual QueryBuilder *select(const String &params);
+	virtual QueryBuilder *update(const String &params);
+	virtual QueryBuilder *del(const String &params);
 
-	virtual QueryBuilder *where(const std::string &params);
-	virtual QueryBuilder *from(const std::string &params);
-	virtual QueryBuilder *insert(const std::string &table_name);
-	virtual QueryBuilder *insert(const std::string &table_name, const std::string &columns);
-	virtual QueryBuilder *values(const std::string &params_str);
+	virtual QueryBuilder *where(const String &params);
+	virtual QueryBuilder *from(const String &params);
+	virtual QueryBuilder *insert(const String &table_name);
+	virtual QueryBuilder *insert(const String &table_name, const String &columns);
+	virtual QueryBuilder *values(const String &params_str);
 	virtual QueryBuilder *val();
-	virtual QueryBuilder *val(const std::string &param);
+	virtual QueryBuilder *val(const String &param);
 	virtual QueryBuilder *val(const char *param);
 	virtual QueryBuilder *val(const int param);
 	virtual QueryBuilder *val(const bool param);
 
-	virtual QueryBuilder *like(const std::string &str);
+	virtual QueryBuilder *like(const String &str);
 
 	virtual QueryBuilder *set();
 	virtual QueryBuilder *cset();
 
-	virtual QueryBuilder *setp(const std::string &col, const std::string &param);
-	virtual QueryBuilder *setp(const std::string &col, const char *param);
-	virtual QueryBuilder *setp(const std::string &col, const int param);
-	virtual QueryBuilder *setp(const std::string &col, const bool param);
+	virtual QueryBuilder *setp(const String &col, const String &param);
+	virtual QueryBuilder *setp(const String &col, const char *param);
+	virtual QueryBuilder *setp(const String &col, const int param);
+	virtual QueryBuilder *setp(const String &col, const bool param);
 
-	virtual QueryBuilder *wp(const std::string &col, const std::string &param);
-	virtual QueryBuilder *wp(const std::string &col, const char *param);
-	virtual QueryBuilder *wp(const std::string &col, const int param);
-	virtual QueryBuilder *wp(const std::string &col, const bool param);
+	virtual QueryBuilder *wp(const String &col, const String &param);
+	virtual QueryBuilder *wp(const String &col, const char *param);
+	virtual QueryBuilder *wp(const String &col, const int param);
+	virtual QueryBuilder *wp(const String &col, const bool param);
 
-	virtual QueryBuilder *nselect(const std::string &params);
-	virtual QueryBuilder *nupdate(const std::string &params);
-	virtual QueryBuilder *ndel(const std::string &params);
+	virtual QueryBuilder *nselect(const String &params);
+	virtual QueryBuilder *nupdate(const String &params);
+	virtual QueryBuilder *ndel(const String &params);
 
-	virtual QueryBuilder *nwhere(const std::string &params);
-	virtual QueryBuilder *nfrom(const std::string &params);
-	virtual QueryBuilder *nlike(const std::string &str);
-	virtual QueryBuilder *nvalues(const std::string &params_str);
-	virtual QueryBuilder *nval(const std::string &param);
+	virtual QueryBuilder *nwhere(const String &params);
+	virtual QueryBuilder *nfrom(const String &params);
+	virtual QueryBuilder *nlike(const String &str);
+	virtual QueryBuilder *nvalues(const String &params_str);
+	virtual QueryBuilder *nval(const String &param);
 	//note col is NOT escaped
-	virtual QueryBuilder *nsetp(const std::string &col, const std::string &escape_param);
+	virtual QueryBuilder *nsetp(const String &col, const String &escape_param);
 	//note col is NOT escaped
-	virtual QueryBuilder *nwp(const std::string &col, const std::string &escape_param);
+	virtual QueryBuilder *nwp(const String &col, const String &escape_param);
 
 	virtual QueryBuilder *limit(const int num);
 	virtual QueryBuilder *offset(const int num);
@@ -79,15 +79,15 @@ public:
 
 	virtual QueryBuilder *wildcard();
 
-	virtual QueryBuilder *w(const std::string &str);
-	virtual QueryBuilder *ew(const std::string &str);
+	virtual QueryBuilder *w(const String &str);
+	virtual QueryBuilder *ew(const String &str);
 
 	virtual QueryBuilder *select_last_insert_id();
 
-	virtual std::string escape(const std::string &params);
+	virtual String escape(const String &params);
 
 	virtual QueryBuilder *prepare();
-	virtual QueryBuilder *set_param(const int index, const std::string &value);
+	virtual QueryBuilder *set_param(const int index, const String &value);
 	virtual QueryBuilder *set_param(const int index, const int value);
 	virtual QueryBuilder *set_param(const int index, const float value);
 
@@ -98,14 +98,14 @@ public:
 	virtual Ref<QueryResult> run();
 	virtual void run_query();
 
-	std::string get_result();
+	String get_result();
 
 	void print();
 
 	QueryBuilder();
 	virtual ~QueryBuilder();
 
-	std::string query_result;
+	String query_result;
 };
 
 #endif
\ No newline at end of file
diff --git a/core/string.cpp b/core/string.cpp
index 1182a25..ab9fcde 100644
--- a/core/string.cpp
+++ b/core/string.cpp
@@ -461,7 +461,7 @@ const char String::operator[](const int index) const {
 	return _data[index];
 }
 
-char String::operator[](const int index) {
+char &String::operator[](const int index) {
 	return _data[index];
 }
 
@@ -624,6 +624,14 @@ String& String::operator=(const std::string &other) {
 	return *this;
 }
 
+String& String::operator=(const char* other) {
+	clear();
+
+	append_str(other);
+
+	return *this;
+}
+
 String::String() {
 	_data = nullptr;
 	_actual_size = 0;
diff --git a/core/string.h b/core/string.h
index 3f3649f..64dae2c 100644
--- a/core/string.h
+++ b/core/string.h
@@ -68,7 +68,7 @@ public:
 	const char *data() const;
 
 	const char operator[](const int index) const;
-	char operator[](const int index);
+	char &operator[](const int index);
 
 	String &operator+=(const String &b);
 	String &operator+=(const char chr);
@@ -100,6 +100,7 @@ public:
 
 	String& operator=(const String &other);
 	String& operator=(const std::string &other);
+	String& operator=(const char* other);
 
 	String();
 	String(const String &other);
diff --git a/database/mysql/mysql_query_builder.cpp b/database/mysql/mysql_query_builder.cpp
index cffabee..830f4c5 100644
--- a/database/mysql/mysql_query_builder.cpp
+++ b/database/mysql/mysql_query_builder.cpp
@@ -34,37 +34,37 @@ QueryBuilder *MysqlQueryBuilder::cvalues() {
 	return this;
 }
 
-QueryBuilder *MysqlQueryBuilder::nselect(const std::string &params) {
+QueryBuilder *MysqlQueryBuilder::nselect(const String &params) {
 	query_result += "SELECT " + params + " ";
 
 	return this;
 }
 
-QueryBuilder *MysqlQueryBuilder::nwhere(const std::string &params) {
+QueryBuilder *MysqlQueryBuilder::nwhere(const String &params) {
 	query_result += "WHERE " + params + " ";
 
 	return this;
 }
 
-QueryBuilder *MysqlQueryBuilder::nfrom(const std::string &params) {
+QueryBuilder *MysqlQueryBuilder::nfrom(const String &params) {
 	query_result += "FROM " + params + " ";
 
 	return this;
 }
 
-QueryBuilder *MysqlQueryBuilder::ninsert(const std::string &table_name) {
+QueryBuilder *MysqlQueryBuilder::ninsert(const String &table_name) {
 	query_result += "INSERT INTO " + table_name + " ";
 
 	return this;
 }
 
-QueryBuilder *MysqlQueryBuilder::nvalues(const std::string &params_str) {
+QueryBuilder *MysqlQueryBuilder::nvalues(const String &params_str) {
 	query_result += "VALUES(" + params_str + ") ";
 
 	return this;
 }
 
-std::string MysqlQueryBuilder::escape(const std::string &params) {
+String MysqlQueryBuilder::escape(const String &params) {
 	if (!_db) {
 		printf("MysqlQueryBuilder::escape !db!\n");
 
@@ -78,7 +78,7 @@ QueryBuilder *MysqlQueryBuilder::prepare() {
 	return this;
 }
 
-QueryBuilder *MysqlQueryBuilder::set_param(const int index, const std::string &value) {
+QueryBuilder *MysqlQueryBuilder::set_param(const int index, const String &value) {
 	return this;
 }
 QueryBuilder *MysqlQueryBuilder::set_param(const int index, const int value) {
diff --git a/database/mysql/mysql_query_builder.h b/database/mysql/mysql_query_builder.h
index 0ff0a84..e083399 100644
--- a/database/mysql/mysql_query_builder.h
+++ b/database/mysql/mysql_query_builder.h
@@ -18,19 +18,19 @@ public:
 	QueryBuilder *values();
 	QueryBuilder *cvalues();
 
-	QueryBuilder *nselect(const std::string &params);
-	QueryBuilder *nwhere(const std::string &params);
-	QueryBuilder *nfrom(const std::string &params);
-	QueryBuilder *ninsert(const std::string &table_name);
-	QueryBuilder *nvalues(const std::string &params_str);
+	QueryBuilder *nselect(const String &params);
+	QueryBuilder *nwhere(const String &params);
+	QueryBuilder *nfrom(const String &params);
+	QueryBuilder *ninsert(const String &table_name);
+	QueryBuilder *nvalues(const String &params_str);
 
 	QueryBuilder *limit(const int num);
 	QueryBuilder *offset(const int num);
 
-	std::string escape(const std::string &params);
+	String escape(const String &params);
 
 	QueryBuilder *prepare();
-	QueryBuilder *set_param(const int index, const std::string &value);
+	QueryBuilder *set_param(const int index, const String &value);
 	QueryBuilder *set_param(const int index, const int value);
 	QueryBuilder *set_param(const int index, const float value);
 
diff --git a/database/sqlite/sqlite3_query_builder.cpp b/database/sqlite/sqlite3_query_builder.cpp
index 3d58ce7..f8c31bf 100644
--- a/database/sqlite/sqlite3_query_builder.cpp
+++ b/database/sqlite/sqlite3_query_builder.cpp
@@ -65,45 +65,45 @@ QueryBuilder *SQLite3QueryBuilder::like() {
 	return this;
 }
 
-QueryBuilder *SQLite3QueryBuilder::nselect(const std::string &params) {
+QueryBuilder *SQLite3QueryBuilder::nselect(const String &params) {
 	query_result += "SELECT " + params + " ";
 
 	return this;
 }
-QueryBuilder *SQLite3QueryBuilder::nupdate(const std::string &params) {
+QueryBuilder *SQLite3QueryBuilder::nupdate(const String &params) {
 	query_result += "UPDATE " + params + " ";
 
 	return this;
 }
-QueryBuilder *SQLite3QueryBuilder::ndel(const std::string &params) {
+QueryBuilder *SQLite3QueryBuilder::ndel(const String &params) {
 	query_result += "DELETE FROM " + params + " ";
 
 	return this;
 }
 
-QueryBuilder *SQLite3QueryBuilder::nwhere(const std::string &params) {
+QueryBuilder *SQLite3QueryBuilder::nwhere(const String &params) {
 	query_result += "WHERE " + params + " ";
 
 	return this;
 }
 
-QueryBuilder *SQLite3QueryBuilder::nfrom(const std::string &params) {
+QueryBuilder *SQLite3QueryBuilder::nfrom(const String &params) {
 	query_result += "FROM " + params + " ";
 
 	return this;
 }
 
-QueryBuilder *SQLite3QueryBuilder::insert(const std::string &table_name) {
+QueryBuilder *SQLite3QueryBuilder::insert(const String &table_name) {
 	query_result += "INSERT INTO " + table_name + " ";
 
 	return this;
 }
-QueryBuilder *SQLite3QueryBuilder::insert(const std::string &table_name, const std::string &columns) {
+QueryBuilder *SQLite3QueryBuilder::insert(const String &table_name, const String &columns) {
 	query_result += "INSERT INTO " + table_name + "(" + columns + ") ";
 
 	return this;
 }
-QueryBuilder *SQLite3QueryBuilder::nvalues(const std::string &params_str) {
+QueryBuilder *SQLite3QueryBuilder::nvalues(const String &params_str) {
 	query_result += "VALUES(" + params_str + ") ";
 
 	return this;
@@ -115,14 +115,14 @@ QueryBuilder *SQLite3QueryBuilder::val() {
 	return this;
 }
 
-QueryBuilder *SQLite3QueryBuilder::nval(const std::string &param) {
+QueryBuilder *SQLite3QueryBuilder::nval(const String &param) {
 	query_result += "'" + param + "', ";
 
 	return this;
 }
 
 QueryBuilder *SQLite3QueryBuilder::val(const char *param) {
-	query_result += "'" + std::string(param) + "', ";
+	query_result += "'" + String(param) + "', ";
 
 	return this;
 }
@@ -145,7 +145,7 @@ QueryBuilder *SQLite3QueryBuilder::val(const bool param) {
 	return this;
 }
 
-QueryBuilder *SQLite3QueryBuilder::nlike(const std::string &str) {
+QueryBuilder *SQLite3QueryBuilder::nlike(const String &str) {
 	query_result += "LIKE '" + str + "' ";
 
 	return this;
@@ -161,17 +161,17 @@ QueryBuilder *SQLite3QueryBuilder::cset() {
 
 	return this;
 }
-QueryBuilder *SQLite3QueryBuilder::nsetp(const std::string &col, const std::string &param) {
+QueryBuilder *SQLite3QueryBuilder::nsetp(const String &col, const String &param) {
 	query_result += col + "='" + param + "', ";
 
 	return this;
 }
-QueryBuilder *SQLite3QueryBuilder::setp(const std::string &col, const char *param) {
-	query_result += col + "='" + std::string(param) + "', ";
+QueryBuilder *SQLite3QueryBuilder::setp(const String &col, const char *param) {
+	query_result += col + "='" + String(param) + "', ";
 
 	return this;
 }
-QueryBuilder *SQLite3QueryBuilder::setp(const std::string &col, const int param) {
+QueryBuilder *SQLite3QueryBuilder::setp(const String &col, const int param) {
 	//todo add a better way
 	std::stringstream ss;
 	ss << param;
@@ -180,7 +180,7 @@ QueryBuilder *SQLite3QueryBuilder::setp(const std::string &col, const int param)
 
 	return this;
 }
-QueryBuilder *SQLite3QueryBuilder::setp(const std::string &col, const bool param) {
+QueryBuilder *SQLite3QueryBuilder::setp(const String &col, const bool param) {
 	if (param)
 		query_result += col + "=1, ";
 	else
@@ -189,17 +189,17 @@ QueryBuilder *SQLite3QueryBuilder::setp(const std::string &col, const bool param
 	return this;
 }
 
-QueryBuilder *SQLite3QueryBuilder::nwp(const std::string &col, const std::string &param) {
+QueryBuilder *SQLite3QueryBuilder::nwp(const String &col, const String &param) {
 	query_result += col + "='" + param + "' ";
 
 	return this;
 }
-QueryBuilder *SQLite3QueryBuilder::wp(const std::string &col, const char *param) {
-	query_result += col + "='" + std::string(param) + "' ";
+QueryBuilder *SQLite3QueryBuilder::wp(const String &col, const char *param) {
+	query_result += col + "='" + String(param) + "' ";
 
 	return this;
 }
-QueryBuilder *SQLite3QueryBuilder::wp(const std::string &col, const int param) {
+QueryBuilder *SQLite3QueryBuilder::wp(const String &col, const int param) {
 	//todo add a better way
 	std::stringstream ss;
 	ss << param;
@@ -208,7 +208,7 @@ QueryBuilder *SQLite3QueryBuilder::wp(const std::string &col, const int param) {
 
 	return this;
 }
-QueryBuilder *SQLite3QueryBuilder::wp(const std::string &col, const bool param) {
+QueryBuilder *SQLite3QueryBuilder::wp(const String &col, const bool param) {
 	if (param)
 		query_result += col + "=1 ";
 	else
@@ -254,7 +254,7 @@ QueryBuilder *SQLite3QueryBuilder::wildcard() {
 	return this;
 }
 
-std::string SQLite3QueryBuilder::escape(const std::string &params) {
+String SQLite3QueryBuilder::escape(const String &params) {
 	if (!_db) {
 		printf("SQLite3QueryBuilder::escape !db!\n");
 
@@ -268,7 +268,7 @@ QueryBuilder *SQLite3QueryBuilder::prepare() {
 	return this;
 }
 
-QueryBuilder *SQLite3QueryBuilder::set_param(const int index, const std::string &value) {
+QueryBuilder *SQLite3QueryBuilder::set_param(const int index, const String &value) {
 	return this;
 }
 QueryBuilder *SQLite3QueryBuilder::set_param(const int index, const int value) {
diff --git a/database/sqlite/sqlite3_query_builder.h b/database/sqlite/sqlite3_query_builder.h
index 092f7c8..9b25010 100644
--- a/database/sqlite/sqlite3_query_builder.h
+++ b/database/sqlite/sqlite3_query_builder.h
@@ -25,34 +25,34 @@ public:
 
 	QueryBuilder *like();
 
-	QueryBuilder *nselect(const std::string &params);
-	QueryBuilder *nupdate(const std::string &params);
-	QueryBuilder *ndel(const std::string &params);
+	QueryBuilder *nselect(const String &params);
+	QueryBuilder *nupdate(const String &params);
+	QueryBuilder *ndel(const String &params);
 
-	QueryBuilder *nwhere(const std::string &params);
-	QueryBuilder *nfrom(const std::string &params);
-	QueryBuilder *insert(const std::string &table_name);
-	QueryBuilder *insert(const std::string &table_name, const std::string &columns);
-	QueryBuilder *nvalues(const std::string &params_str);
+	QueryBuilder *nwhere(const String &params);
+	QueryBuilder *nfrom(const String &params);
+	QueryBuilder *insert(const String &table_name);
+	QueryBuilder *insert(const String &table_name, const String &columns);
+	QueryBuilder *nvalues(const String &params_str);
 	QueryBuilder *val();
-	QueryBuilder *nval(const std::string &param);
+	QueryBuilder *nval(const String &param);
 	QueryBuilder *val(const char *param);
 	QueryBuilder *val(const int param);
 	QueryBuilder *val(const bool param);
 
-	QueryBuilder *nlike(const std::string &str);
+	QueryBuilder *nlike(const String &str);
 
 	QueryBuilder *set();
 	QueryBuilder *cset();
-	QueryBuilder *nsetp(const std::string &col, const std::string &param);
-	QueryBuilder *setp(const std::string &col, const char *param);
-	QueryBuilder *setp(const std::string &col, const int param);
-	QueryBuilder *setp(const std::string &col, const bool param);
+	QueryBuilder *nsetp(const String &col, const String &param);
+	QueryBuilder *setp(const String &col, const char *param);
+	QueryBuilder *setp(const String &col, const int param);
+	QueryBuilder *setp(const String &col, const bool param);
 
-	QueryBuilder *nwp(const std::string &col, const std::string &param);
-	QueryBuilder *wp(const std::string &col, const char *param);
-	QueryBuilder *wp(const std::string &col, const int param);
-	QueryBuilder *wp(const std::string &col, const bool param);
+	QueryBuilder *nwp(const String &col, const String &param);
+	QueryBuilder *wp(const String &col, const char *param);
+	QueryBuilder *wp(const String &col, const int param);
+	QueryBuilder *wp(const String &col, const bool param);
 
 	QueryBuilder *limit(const int num);
 	QueryBuilder *offset(const int num);
@@ -65,10 +65,10 @@ public:
 
 	QueryBuilder *select_last_insert_id();
 
-	std::string escape(const std::string &params);
+	String escape(const String &params);
 
 	QueryBuilder *prepare();
-	QueryBuilder *set_param(const int index, const std::string &value);
+	QueryBuilder *set_param(const int index, const String &value);
 	QueryBuilder *set_param(const int index, const int value);
 	QueryBuilder *set_param(const int index, const float value);