fix(MySQL): MySQL UUID binding temporary string #3587

Data/MySQL/src/Binder.cpp

@@ -213,8 +213,7 @@ void Binder::bind(std::size_t pos, const Time& val, Direction dir)
 
 void Binder::bind(std::size_t pos, const UUID& val, Direction dir)
 {
-	std::string str = val.toString();
+	bind(pos, toString(val), dir);
-	bind(pos, str, dir);
 }
 
 

Data/include/Poco/Data/AbstractBinder.h

@@ -356,6 +356,13 @@ public:
 
 	static bool isInBound(Direction dir);
 		/// Returns true if direction is in bound;
+
+protected:
+	const std::string& toString(const UUID& uuid);
+
+private:
+	using StringList = std::vector<std::string*>;
+	std::unique_ptr<StringList> _pStrings;
 };
 
 

Data/src/AbstractBinder.cpp

@@ -33,6 +33,19 @@ AbstractBinder::AbstractBinder()
 
 AbstractBinder::~AbstractBinder()
 {
+	if (_pStrings)
+	{
+		for (auto& s : *_pStrings)
+			delete s;
+	}
+}
+
+
+const std::string& AbstractBinder::toString(const UUID& uuid)
+{
+	if (!_pStrings) _pStrings.reset(new StringList);
+	_pStrings->push_back(new std::string(uuid.toString()));
+	return *_pStrings->back();
 }