Fixed PostgreSQL SessionImpl, use mysql_reset_connection() if it is

available

Use mysql_reset_connection() only if MySQL version is >= 5.7 or MariaDB
version is >= 3.0.0 otherwise fall back to myslq_refresh()

Data/MySQL/src/SessionHandle.cpp

@@ -178,7 +178,11 @@ void SessionHandle::rollback()
 
 void SessionHandle::reset()
 {
+#if ((defined (MYSQL_VERSION_ID)) && (MYSQL_VERSION_ID >= 50700)) || ((defined (MARIADB_PACKAGE_VERSION_ID)) && (MARIADB_PACKAGE_VERSION_ID >= 30000))
+	if (mysql_reset_connection(_pHandle) != 0)
+#else
 	if (mysql_refresh(_pHandle, REFRESH_TABLES | REFRESH_STATUS | REFRESH_THREADS | REFRESH_READ_LOCK) != 0)
+#endif
 		throw TransactionException("Reset connection failed.", _pHandle);
 }
 

Data/PostgreSQL/include/Poco/Data/PostgreSQL/SessionImpl.h

@@ -62,6 +62,9 @@ public:
 	void close();
 		/// Closes the connection.
 
+	void reset();
+		/// Do nothing
+
 	bool isConnected() const;
 		/// Returns true if connected, false otherwise.
 

Data/PostgreSQL/src/SessionImpl.cpp

@@ -151,6 +151,12 @@ void SessionImpl::close()
 }
 
 
+void SessionImpl::reset()
+{
+
+}
+
+
 bool SessionImpl::isConnected() const
 {
 	return _sessionHandle.isConnected();