Query, Explain and Cancel are going throught the asyncdbconnection now.

Todo: Notice processing and error reporting.

PgsqlConn.cpp

@@ -171,11 +171,15 @@ Canceller::~Canceller()
 	}
 }
 
-void Canceller::cancel()
+bool Canceller::cancel(std::string *error)
 {
 	const int errbuf_size = 256;
 	char errbuf[errbuf_size];
-	PQcancel(m_cancel, errbuf, errbuf_size);
+	bool res = PQcancel(m_cancel, errbuf, errbuf_size);
+	if (!res && error) {
+		*error = errbuf;
+	}
+	return res;
 }
 
 
@@ -272,11 +276,11 @@ bool Connection::sendQuery(const char *query)
 	return res == 1;
 }
 
-std::unique_ptr<Result> Connection::getResult()
+std::shared_ptr<Result> Connection::getResult()
 {
 	PGresult *r = PQgetResult(conn);
 	if (r) {
-		return std::make_unique<Result>(r);
+		return std::make_shared<Result>(r);
 	}
 	else {
 		return nullptr;

PgsqlConn.h

@@ -129,15 +129,17 @@ namespace Pgsql {
 
 	class Canceller {
 	public:
+		Canceller() = default;
 		Canceller(PGcancel *c);
 		Canceller(const Canceller&) = delete;
 		Canceller& operator=(const Canceller&) = delete;
 		Canceller(Canceller&& rhs);
 		Canceller& operator=(Canceller&& rhs);
 		~Canceller();
-		void cancel();
+
+		bool cancel(std::string *error);
 	private:
-		PGcancel *m_cancel;
+		PGcancel *m_cancel = nullptr;
 	};
 
 
@@ -187,12 +189,16 @@ namespace Pgsql {
 		}
 
 		bool sendQuery(const char * query);
+		bool sendQuery(const std::string &command)
+		{
+			return sendQuery(command.c_str());
+		}
 		bool sendQuery(const QString &command)
 		{
 			return sendQuery(command.toUtf8().data());
 		}
 
-		std::unique_ptr<Result> getResult();
+		std::shared_ptr<Result> getResult();
 
 		bool consumeInput();
 		bool isBusy();

asyncdbconnection.cpp

@@ -19,10 +19,25 @@ void ASyncDBConnection::closeConnection()
 	m_thread.join();
 }
 
+bool ASyncDBConnection::send(const std::string &command, on_result_callback on_result)
+{
+	{
+		std::lock_guard<std::mutex> lg(m_threadData.m_commandQueue.m_mutex);
+		m_threadData.m_commandQueue.m_queue.emplace(command, on_result);
+		m_threadData.m_commandQueue.m_newEvent.set();
+	}
+	return true;
+}
+
+bool ASyncDBConnection::cancel()
+{
+	return m_threadData.cancel();
+}
+
 void ASyncDBConnection::setStateCallback(on_state_callback state_callback)
 {
-	std::lock_guard<std::mutex> lg(m_threadData.m_stateCallbackMutex);
+	std::lock_guard<std::mutex> lg(m_threadData.m_stateCallback.m_mutex);
-	m_threadData.m_stateCallback = state_callback;
+	m_threadData.m_stateCallback.m_func = state_callback;
 }
 
 ASyncDBConnection::Thread::Thread()
@@ -31,21 +46,39 @@ ASyncDBConnection::Thread::Thread()
 
 void ASyncDBConnection::Thread::run()
 {
+	m_terminated = false;
 	while (!terminateRequested) {
 
 		// make or recover connection
 		if (makeConnection()) {
+			m_canceller = m_connection.getCancel();
 
 
 			// send commands and receive results
 			communicate();
 		}
+		else {
+			// It is not possible to determine the source of the problem.
+			// Accept for PQconnectionNeedsPassword
 
+			// Pass problem to main thread and stop this thread
+
+			// Main thread needs to know it has to restart connecting if it want's to.
+			// TODO: add status functions to help main thread so it doesn't have to remember
+			// everything reported through callbacks.
+
+			break;
 		}
-
+	}
+	m_terminated = true;
 	// close connection
 }
 
+bool ASyncDBConnection::Thread::cancel()
+{
+	return m_canceller.cancel(nullptr);
+}
+
 bool ASyncDBConnection::Thread::makeConnection()
 {
 	using namespace std::chrono_literals;
@@ -122,18 +155,16 @@ void ASyncDBConnection::Thread::communicate()
 		// - stop signal
 		//   - return
 
-//		WSAEventSelect(sock, socket_event.handle(), fd);
-		WaitHandleList whl;
-//		auto wait_result_socket_event = whl.add(socket_event);
-		auto wait_result_stop = whl.add(m_stopEvent);
 
-		DWORD res = MsgWaitForMultipleObjectsEx(
+		if (m_state == State::Connected) {
-			whl.count(), // _In_       DWORD  nCount,
+			 waitForAndSendCommand();
-			whl,         // _In_ const HANDLE *pHandles,
+		}
-			INFINITE,     // _In_       DWORD  dwMilliseconds,
+		else if (m_state == State::QuerySend || m_state == State::CancelSend) {
-			0,           // _In_       DWORD  dwWakeMask,
+			// Wait for result, even after a cancel we should wait, for all results
-			0            // _In_       DWORD  dwFlags
+			// New command's are not excepted when one has been send
-			);
+			waitForResult();
+		}
+
 	}
 }
 
@@ -145,8 +176,105 @@ void ASyncDBConnection::Thread::stop()
 
 void ASyncDBConnection::Thread::doStateCallback(State state)
 {
-	std::lock_guard<std::mutex> lg(m_stateCallbackMutex);
+	m_state = state;
-	if (m_stateCallback) {
+	std::lock_guard<std::mutex> lg(m_stateCallback.m_mutex);
-		m_stateCallback(state);
+	if (m_stateCallback.m_func) {
+		m_stateCallback.m_func(state);
 	}
 }
+
+void ASyncDBConnection::Thread::waitForAndSendCommand()
+{
+	WaitHandleList whl;
+	auto wait_result_new_command = whl.add(m_commandQueue.m_newEvent);
+	auto wait_result_stop = whl.add(m_stopEvent);
+
+	DWORD res = MsgWaitForMultipleObjectsEx(
+		whl.count(), // _In_       DWORD  nCount,
+		whl,         // _In_ const HANDLE *pHandles,
+		INFINITE,     // _In_       DWORD  dwMilliseconds,
+		0,           // _In_       DWORD  dwWakeMask,
+		0            // _In_       DWORD  dwFlags
+		);
+	if (res == wait_result_new_command) {
+		doNewCommand();
+	}
+	// if (res == wait_result_stop) return;
+}
+
+void ASyncDBConnection::Thread::doNewCommand()
+{
+	// todo: send command
+	// get command from top of queue (but leave it in the queue, we need the callback)
+	std::string command;
+	{
+		std::lock_guard<std::mutex> lg(m_commandQueue.m_mutex);
+		if (! m_commandQueue.m_queue.empty())	{
+			command = m_commandQueue.m_queue.front().command;
+		}
+	}
+	if (!command.empty() && m_connection.sendQuery(command)) {
+		doStateCallback(State::QuerySend);
+	}
+	else {
+		std::string error = m_connection.getErrorMessage();
+		// todo: need to report the error
+	}
+}
+
+void ASyncDBConnection::Thread::waitForResult()
+{
+
+	int sock = m_connection.socket();
+	Win32Event socket_event(Win32Event::Reset::Auto, Win32Event::Initial::Clear);
+
+	long fd = FD_WRITE;
+
+	while (true) {
+		WSAEventSelect(sock, socket_event.handle(), fd);
+
+		WaitHandleList whl;
+		auto wait_result_socket = whl.add(socket_event);
+		auto wait_result_stop = whl.add(m_stopEvent);
+
+		DWORD res = MsgWaitForMultipleObjectsEx(
+			whl.count(), // _In_       DWORD  nCount,
+			whl,         // _In_ const HANDLE *pHandles,
+			INFINITE,     // _In_       DWORD  dwMilliseconds,
+			0,           // _In_       DWORD  dwWakeMask,
+			0            // _In_       DWORD  dwFlags
+			);
+		if (res == wait_result_socket) {
+			if (m_connection.consumeInput()) {
+				if ( ! m_connection.isBusy()) {
+					auto res(m_connection.getResult());
+					{
+						std::lock_guard<std::mutex> lg(m_commandQueue.m_mutex);
+						m_commandQueue.m_queue.front().on_result(res);
+						if (res == nullptr) {
+							m_commandQueue.m_queue.pop();
+							doStateCallback(State::Connected);
+							break; // leave the while loop
+
+						}
+					}
+
+				}
+				// else is still waiting for more data
+
+			}
+			else {
+				// error during consume
+
+			}
+		}
+		if (res == wait_result_stop) {
+			// Send cancel, close connection and terminate thread
+			cancel();
+			doStateCallback(State::Terminating);
+			break;
+		}
+	} // end while
+	// When last result received, remove command from queue
+}
+

asyncdbconnection.h

@@ -5,6 +5,7 @@
 #include "win32event.h"
 #include <functional>
 #include <mutex>
+#include <queue>
 #include <vector>
 #include <thread>
 
@@ -15,10 +16,11 @@ public:
 		Connecting,
 		Connected,
 		QuerySend,
-		CancelSend
+		CancelSend,
+		Terminating
 	};
 
-	using on_result_callback = std::function<void(Pgsql::Result)>;
+	using on_result_callback = std::function<void(std::shared_ptr<Pgsql::Result>)>;
 	using on_state_callback = std::function<void(State)>;
 
 	ASyncDBConnection();
@@ -30,26 +32,44 @@ public:
 
 	/** Sends command to the server.
 
-	When the result is in and no result_task_queue was passed then on_result will be
+	When the result is in on_result will be	called directly within the thread.
-	called directly within the thread.
 
 	If the command gives multiple results on_result will be called for each result.
 	*/
 	bool send(const std::string &command, on_result_callback on_result);
 
+	bool cancel();
+
 private:
 
 	class Command {
 	public:
 		std::string command;
 		on_result_callback on_result;
+
+		Command() = default;
+		Command(const std::string &cmd, on_result_callback cb)
+			: command(cmd), on_result(cb)
+		{}
 	};
 
 	/// Contains all the members accessed by the thread
 	class Thread {
 	public:
-		on_state_callback m_stateCallback;
+		using t_CommandQueue = std::queue<Command>;
-		std::mutex m_stateCallbackMutex;
+		struct {
+			std::mutex m_mutex;
+			on_state_callback m_func;
+		} m_stateCallback;
+
+		struct t_Command {
+			std::mutex m_mutex;
+			t_CommandQueue m_queue;
+			Win32Event m_newEvent;
+			t_Command()
+				: m_newEvent(Win32Event::Reset::Auto, Win32Event::Initial::Clear)
+			{}
+		} m_commandQueue;
 
 		std::string m_initString;
 
@@ -59,21 +79,29 @@ private:
 		void run();
 
 		/// Sends a cancel request to the DB server
-		void cancel();
+		bool cancel();
 
 		void stop();
 
 	private:
 
+		State m_state = State::NotConnected;
+
 		Win32Event m_stopEvent;
 		Pgsql::Connection m_connection;
 		bool terminateRequested = false; ///< is set when the thread should stop
+		bool m_terminated = true;
+		Pgsql::Canceller m_canceller;
 
 
 		bool makeConnection();
 		void communicate();
 
 		void doStateCallback(State state);
+		/// Wait's for a command to come in and send's it to the server
+		void waitForAndSendCommand();
+		void doNewCommand();
+		void waitForResult();
 	};
 
 	Thread m_threadData;

mainwindow.cpp

@@ -46,14 +46,14 @@ MainWindow::MainWindow(QWidget *parent)
 	action = ui->mainToolBar->addAction("connect");
 	connect(action, &QAction::triggered, this, &MainWindow::startConnect);
 
-//	action = ui->mainToolBar->addAction("execute");
+	action = ui->mainToolBar->addAction("execute");
-//	connect(action, &QAction::triggered, this, &MainWindow::performQuery);
+	connect(action, &QAction::triggered, this, &MainWindow::performQuery);
 
-//	action = ui->mainToolBar->addAction("explain");
+	action = ui->mainToolBar->addAction("explain");
-//	connect(action, &QAction::triggered, this, &MainWindow::performExplain);
+	connect(action, &QAction::triggered, this, &MainWindow::performExplain);
 
-//	action = ui->mainToolBar->addAction("cancel");
+	action = ui->mainToolBar->addAction("cancel");
-//	connect(action, &QAction::triggered, this, &MainWindow::cancel_query);
+	connect(action, &QAction::triggered, this, &MainWindow::cancel_query);
 
 	m_dbConnection.setStateCallback([this](ASyncDBConnection::State st)
 		{
@@ -112,174 +112,129 @@ void MainWindow::connectionStateChanged(ASyncDBConnection::State state)
 
 void MainWindow::startConnect()
 {
-//	if (connection == nullptr) {
-//		connection = std::make_unique<pg::Connection>();
-//	}
-//	QString connstr = ui->connectionStringEdit->text();
-//	bool ok = connection->connectStart(connstr + " application_name=Ivory client_encoding=utf8");
-//	if (ok && connection->status() != CONNECTION_BAD) {
-//		// Start polling
-//		int s = connection->socket();
-
-//		connectingState.notifier = std::make_unique<QSocketNotifier>(s, QSocketNotifier::Write);
-//		connect(connectingState.notifier.get(), &QSocketNotifier::activated, this, &MainWindow::socket_activate_connect);
-
-//		connectingState.poll_state = PGRES_POLLING_WRITING;
-//		statusBar()->showMessage(tr("Connecting"));
-//	}
-//	else {
-//		statusBar()->showMessage(tr("Connecting fail"));
-//	}
-
 	std::string connstr = ui->connectionStringEdit->text().toUtf8().data();
 	m_dbConnection.setupConnection(connstr);
 }
 
-//void MainWindow::socket_activate_connect(int )
+void MainWindow::performQuery()
-//{
+{
-//	connectingState.poll_state = connection->connectPoll();
+	ui->ResultView->setModel(nullptr);
+	resultModel.reset();
+	ui->messagesEdit->clear();
 
+	QString command = ui->queryEdit->toPlainText();
+	std::string cmd = command.toUtf8().data();
+	m_dbConnection.send(cmd,
+		[this](std::shared_ptr<Pgsql::Result> res)
+		{
+			QueueTask([this, res]() { query_ready(res); });
+		});
+}
 
-//	if (connectingState.poll_state == PGRES_POLLING_OK) {
+void MainWindow::query_ready(std::shared_ptr<Pgsql::Result> dbres)
-//		connection->setNoticeReceiver(
+{
-//					std::bind(&MainWindow::processNotice, this, std::placeholders::_1));
+	if (dbres) {
-//		statusBar()->showMessage(tr("Connected"));
+		auto st = dbres->resultStatus();
-//		connectingState.notifier.reset();
+		if (st == PGRES_TUPLES_OK) {
-//	}
+			resultModel.reset(new QueryResultModel(nullptr , dbres));
-//	else if (connectingState.poll_state == PGRES_POLLING_FAILED) {
+			ui->ResultView->setModel(resultModel.get());
-//		statusBar()->showMessage(tr("Connection failed"));
+			statusBar()->showMessage(tr("Query ready."));
-//		connectingState.notifier.reset();
+		}
-//	}
+		else {
-//	else if (connectingState.poll_state == PGRES_POLLING_READING) {
+			if (st == PGRES_EMPTY_QUERY) {
-//		statusBar()->showMessage(tr("Connecting.."));
+				statusBar()->showMessage(tr("Empty query."));
-//		connectingState.notifier = std::make_unique<QSocketNotifier>(connection->socket(), QSocketNotifier::Read);
+			}
-//		connect(connectingState.notifier.get(), &QSocketNotifier::activated, this, &MainWindow::socket_activate_connect);
+			else if (st == PGRES_COMMAND_OK) {
-//	}
+				statusBar()->showMessage(tr("Command OK."));
-//	else if (connectingState.poll_state == PGRES_POLLING_WRITING) {
+			}
-//		statusBar()->showMessage(tr("Connecting..."));
+			else if (st == PGRES_COPY_OUT) {
-//		connectingState.notifier = std::make_unique<QSocketNotifier>(connection->socket(), QSocketNotifier::Write);
+				statusBar()->showMessage(tr("COPY OUT."));
-//		connect(connectingState.notifier.get(), &QSocketNotifier::activated, this, &MainWindow::socket_activate_connect);
+			}
-//	}
+			else if (st == PGRES_COPY_IN) {
-//}
+				statusBar()->showMessage(tr("COPY IN."));
+			}
+			else if (st == PGRES_BAD_RESPONSE) {
+				statusBar()->showMessage(tr("BAD RESPONSE."));
+			}
+			else if (st == PGRES_NONFATAL_ERROR) {
+				statusBar()->showMessage(tr("NON FATAL ERROR."));
+			}
+			else if (st == PGRES_FATAL_ERROR) {
+				statusBar()->showMessage(tr("FATAL ERROR."));
+			}
+			else if (st == PGRES_COPY_BOTH) {
+				statusBar()->showMessage(tr("COPY BOTH shouldn't happen is for replication."));
+			}
+			else if (st == PGRES_SINGLE_TUPLE) {
+				statusBar()->showMessage(tr("SINGLE TUPLE result."));
+			}
+			else {
+				statusBar()->showMessage(tr("No tuples returned, possibly an error..."));
+			}
+			//receiveNotice(dbres->diagDetails());
+		}
+	}
+	else {
+		statusBar()->showMessage(tr("Query cancelled."));
+	}
+}
 
+void MainWindow::performExplain()
+{
+	ui->ResultView->setModel(nullptr);
+	resultModel.reset();
+	ui->messagesEdit->clear();
 
-//void MainWindow::performQuery()
+	QString command = "EXPLAIN (ANALYZE, VERBOSE, BUFFERS, FORMAT JSON) ";
-//{
+	command += ui->queryEdit->toPlainText();
-//	ui->ResultView->setModel(nullptr);
+	std::string cmd = command.toUtf8().data();
-//	resultModel.reset();
+	m_dbConnection.send(cmd,
-//	ui->messagesEdit->clear();
+		[this](std::shared_ptr<Pgsql::Result> res)
+		{
+			if (res) {
+				// Process explain data seperately
+				std::thread([this,res]()
+				{
+					std::shared_ptr<ExplainRoot> explain;
+					if (res->getCols() == 1 && res->getRows() == 1) {
+						std::string s = res->getVal(0, 0);
+						Json::Value root;   // will contains the root value after parsing.
+						Json::Reader reader;
+						bool parsingSuccessful = reader.parse(s, root);
+						if (parsingSuccessful) {
+							explain = ExplainRoot::createFromJson(root);
+						}
+					}
+					QueueTask([this, explain]() { explain_ready(explain); });
+				}).detach();
+			}
+		});
+}
 
-//	queryCancel = std::move(connection->getCancel());
+void MainWindow::explain_ready(ExplainRoot::SPtr explain)
+{
+	if (explain) {
+		explainModel.reset(new QueryExplainModel(nullptr, explain));
+		ui->explainTreeView->setModel(explainModel.get());
+		ui->explainTreeView->expandAll();
+		ui->explainTreeView->setColumnWidth(0, 200);
+		ui->explainTreeView->setColumnWidth(1, 80);
+		ui->explainTreeView->setColumnWidth(2, 80);
+		ui->explainTreeView->setColumnWidth(3, 80);
+		ui->explainTreeView->setColumnWidth(4, 80);
+		ui->explainTreeView->setColumnWidth(5, 80);
+		ui->explainTreeView->setColumnWidth(6, 600);
+		statusBar()->showMessage(tr("Explain ready."));
+	}
+	else {
+		statusBar()->showMessage(tr("Explain failed."));
+	}
+}
 
-//	QString command = ui->queryEdit->toPlainText();
+void MainWindow::cancel_query()
-
+{
-//	std::thread([this,command]()
+	m_dbConnection.cancel();
-//		{
+}
-//			auto res = std::make_shared<Pgsql::Result>(connection->query(command));
-//			QueueTask([this, res]() { query_ready(std::move(*res)); });
-//		}).detach();
-//}
-
-//void MainWindow::query_ready(Pgsql::Result dbres)
-//{
-//	if (dbres) {
-//		auto st = dbres.resultStatus();
-//		if (st == PGRES_TUPLES_OK) {
-//			resultModel.reset(new QueryResultModel(nullptr , std::move(dbres)));
-//			ui->ResultView->setModel(resultModel.get());
-//			statusBar()->showMessage(tr("Query ready."));
-//		}
-//		else {
-//			if (st == PGRES_EMPTY_QUERY) {
-//				statusBar()->showMessage(tr("Empty query."));
-//			}
-//			else if (st == PGRES_COMMAND_OK) {
-//				statusBar()->showMessage(tr("Command OK."));
-//			}
-//			else if (st == PGRES_COPY_OUT) {
-//				statusBar()->showMessage(tr("COPY OUT."));
-//			}
-//			else if (st == PGRES_COPY_IN) {
-//				statusBar()->showMessage(tr("COPY IN."));
-//			}
-//			else if (st == PGRES_BAD_RESPONSE) {
-//				statusBar()->showMessage(tr("BEAD RESPONSE."));
-//			}
-//			else if (st == PGRES_NONFATAL_ERROR) {
-//				statusBar()->showMessage(tr("NON FATAL ERROR."));
-//			}
-//			else if (st == PGRES_FATAL_ERROR) {
-//				statusBar()->showMessage(tr("FATAL ERROR."));
-//			}
-//			else if (st == PGRES_COPY_BOTH) {
-//				statusBar()->showMessage(tr("COPY BOTH shouldn't happen is for replication."));
-//			}
-//			else if (st == PGRES_SINGLE_TUPLE) {
-//				statusBar()->showMessage(tr("SINGLE TUPLE result."));
-//			}
-//			else {
-//				statusBar()->showMessage(tr("No tuples returned, possibly an error..."));
-//			}
-//			receiveNotice(dbres.diagDetails());
-//		}
-//	}
-//	else {
-//		statusBar()->showMessage(tr("Query cancelled."));
-//	}
-//}
-
-//void MainWindow::performExplain()
-//{
-//	ui->ResultView->setModel(nullptr);
-//	resultModel.reset();
-//	ui->messagesEdit->clear();
-
-//	queryCancel = std::move(connection->getCancel());
-
-//	QString command = "EXPLAIN (ANALYZE, VERBOSE, BUFFERS, FORMAT JSON) ";
-//	command += ui->queryEdit->toPlainText();
-////	explainFuture = std::async(std::launch::async, [this,command]()-> std::unique_ptr<ExplainRoot>
-//   std::thread([this,command]()
-//		{
-//			std::shared_ptr<ExplainRoot> explain;
-//			auto res = connection->query(command);
-//			if (res.getCols() == 1 && res.getRows() == 1) {
-//				std::string s = res.getVal(0, 0);
-//				Json::Value root;   // will contains the root value after parsing.
-//				Json::Reader reader;
-//				bool parsingSuccessful = reader.parse(s, root);
-//				if (parsingSuccessful) {
-//					explain = ExplainRoot::createFromJson(root);
-//				}
-//			}
-//			QueueTask([this, explain]() { explain_ready(explain); });
-//		}).detach();
-//}
-
-//void MainWindow::explain_ready(ExplainRoot::SPtr explain)
-//{
-//	if (explain) {
-//		explainModel.reset(new QueryExplainModel(nullptr, explain));
-//		ui->explainTreeView->setModel(explainModel.get());
-//		ui->explainTreeView->expandAll();
-//		ui->explainTreeView->setColumnWidth(0, 200);
-//		ui->explainTreeView->setColumnWidth(1, 80);
-//		ui->explainTreeView->setColumnWidth(2, 80);
-//		ui->explainTreeView->setColumnWidth(3, 80);
-//		ui->explainTreeView->setColumnWidth(4, 80);
-//		ui->explainTreeView->setColumnWidth(5, 80);
-//		ui->explainTreeView->setColumnWidth(6, 600);
-//		statusBar()->showMessage(tr("Explain ready."));
-//	}
-//	else {
-//		statusBar()->showMessage(tr("Explain failed."));
-//	}
-//}
-
-//void MainWindow::cancel_query()
-//{
-//	queryCancel.cancel();
-//}
 
 //void MainWindow::processNotice(const PGresult *result)
 //{

mainwindow.h

@@ -57,12 +57,8 @@ private:
 
 	void connectionStateChanged(ASyncDBConnection::State state);
 
-//	std::unique_ptr<Pgsql::Connection> connection;
+	std::unique_ptr<QueryResultModel> resultModel;
-//	std::unique_ptr<QueryResultModel> resultModel;
+	std::unique_ptr<QueryExplainModel> explainModel;
-//	std::unique_ptr<QueryExplainModel> explainModel;
-
-//	Pgsql::Canceller queryCancel;
-
 
 //	struct {
 //		std::unique_ptr<QSocketNotifier> notifier;
@@ -70,17 +66,17 @@ private:
 //	} connectingState;
 
 //	void processNotice(const PGresult *result);
-//	void query_ready(Pgsql::Result res);
+	void query_ready(std::shared_ptr<Pgsql::Result> res);
-//	void explain_ready(std::shared_ptr<ExplainRoot> explain);
+	void explain_ready(std::shared_ptr<ExplainRoot> explain);
 private slots:
 
 	void startConnect();
 
-//	void performQuery();
+	void performQuery();
-//	void performExplain();
+	void performExplain();
 //	void socket_activate_connect(int socket);
 
-//	void cancel_query();
+	void cancel_query();
 //	void receiveNotice(Pgsql::ErrorDetails notice);
 
 	void processCallableQueue();

mainwindow.ui

@@ -38,7 +38,7 @@
       <widget class="QTextEdit" name="queryEdit"/>
       <widget class="QTabWidget" name="tabWidget">
        <property name="currentIndex">
-        <number>2</number>
+        <number>1</number>
        </property>
        <widget class="QWidget" name="messageTab">
         <attribute name="title">
@@ -147,7 +147,7 @@
      <x>0</x>
      <y>0</y>
      <width>726</width>
-     <height>26</height>
+     <height>25</height>
     </rect>
    </property>
    <widget class="QMenu" name="menuTest">

queryresultmodel.cpp

@@ -1,6 +1,6 @@
 #include "queryresultmodel.h"
 
-QueryResultModel::QueryResultModel(QObject *parent, Pgsql::Result &&r)
+QueryResultModel::QueryResultModel(QObject *parent, std::shared_ptr<Pgsql::Result> r)
 	: QAbstractTableModel(parent)
 	, result(std::move(r))
 {}
@@ -8,13 +8,13 @@ QueryResultModel::QueryResultModel(QObject *parent, Pgsql::Result &&r)
 
 int QueryResultModel::rowCount(const QModelIndex &) const
 {
-	int r = result.getRows();
+	int r = result->getRows();
 	return r;
 }
 
 int QueryResultModel::columnCount(const QModelIndex &) const
 {
-	int r = result.getCols();
+	int r = result->getCols();
 	return r;
 }
 
@@ -25,7 +25,7 @@ QVariant QueryResultModel::data(const QModelIndex &index, int role) const
 	int col = index.column();
 	if (role == Qt::DisplayRole) {
 
-		r = QString(result.getVal(col, rij));
+		r = QString(result->getVal(col, rij));
 	}
 	else if (role == Qt::TextAlignmentRole) {
 		if (col == 0) {
@@ -43,7 +43,7 @@ QVariant QueryResultModel::headerData(int section, Qt::Orientation orientation,
 	QVariant r;
 	if (role == Qt::DisplayRole) {
 		if (orientation == Qt::Horizontal) {
-			r = QString(result.getColName(section));
+			r = QString(result->getColName(section));
 		}
 		else {
 			r = QString::number(section + 1);

queryresultmodel.h

@@ -8,7 +8,7 @@ class QueryResultModel : public QAbstractTableModel
 {
 	Q_OBJECT
 public:
-	QueryResultModel(QObject *parent, Pgsql::Result &&r);
+	QueryResultModel(QObject *parent, std::shared_ptr<Pgsql::Result> r);
 
 	int rowCount(const QModelIndex &parent = QModelIndex()) const override;
 	int columnCount(const QModelIndex &parent = QModelIndex()) const override;
@@ -17,7 +17,7 @@ public:
 //	virtual Qt::ItemFlags flags(const QModelIndex &index) const override;
 
 private:
-	Pgsql::Result result;
+	std::shared_ptr<Pgsql::Result> result;
 };
 
 #endif // QUERYRESULTMODEL_H

tsqueue.h

@@ -24,4 +24,5 @@ private:
 	t_CallableQueue futureQueue;
 };
 
+
 #endif // TSQUEUE_H

ui_mainwindow.h

@@ -136,7 +136,7 @@ public:
         MainWindow->setCentralWidget(centralWidget);
         menuBar = new QMenuBar(MainWindow);
         menuBar->setObjectName(QStringLiteral("menuBar"));
-        menuBar->setGeometry(QRect(0, 0, 726, 26));
+        menuBar->setGeometry(QRect(0, 0, 726, 25));
         menuTest = new QMenu(menuBar);
         menuTest->setObjectName(QStringLiteral("menuTest"));
         MainWindow->setMenuBar(menuBar);
@@ -151,7 +151,7 @@ public:
 
         retranslateUi(MainWindow);
 
-        tabWidget->setCurrentIndex(2);
+        tabWidget->setCurrentIndex(1);
 
 
         QMetaObject::connectSlotsByName(MainWindow);