mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-27 10:02:01 +00:00
916 lines
29 KiB
C++
916 lines
29 KiB
C++
#include <iomanip>
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#include <ext/scope_guard.h>
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#include <Poco/Net/NetException.h>
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#include <daemon/OwnSplitChannel.h>
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#include <Common/ClickHouseRevision.h>
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#include <Common/CurrentThread.h>
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#include <Common/Stopwatch.h>
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#include <Common/ClickHouseRevision.h>
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#include <Common/Stopwatch.h>
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#include <Common/NetException.h>
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#include <Common/config_version.h>
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#include <IO/Progress.h>
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#include <IO/CompressedReadBuffer.h>
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#include <IO/CompressedWriteBuffer.h>
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#include <IO/ReadBufferFromPocoSocket.h>
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#include <IO/WriteBufferFromPocoSocket.h>
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#include <IO/CompressionSettings.h>
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#include <IO/copyData.h>
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#include <DataStreams/AsynchronousBlockInputStream.h>
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#include <DataStreams/NativeBlockInputStream.h>
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#include <DataStreams/NativeBlockOutputStream.h>
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#include <Interpreters/executeQuery.h>
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#include <Interpreters/Quota.h>
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#include <Interpreters/TablesStatus.h>
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#include <Interpreters/InternalTextLogsQueue.h>
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#include <Storages/StorageMemory.h>
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#include <Storages/StorageReplicatedMergeTree.h>
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#include <Core/ExternalTable.h>
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#include "TCPHandler.h"
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namespace DB
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{
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namespace ErrorCodes
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{
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extern const int CLIENT_HAS_CONNECTED_TO_WRONG_PORT;
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extern const int UNKNOWN_DATABASE;
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extern const int UNKNOWN_EXCEPTION;
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extern const int UNKNOWN_PACKET_FROM_CLIENT;
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extern const int POCO_EXCEPTION;
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extern const int STD_EXCEPTION;
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extern const int SOCKET_TIMEOUT;
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extern const int UNEXPECTED_PACKET_FROM_CLIENT;
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}
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void TCPHandler::runImpl()
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{
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connection_context = server.context();
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connection_context.setSessionContext(connection_context);
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Settings global_settings = connection_context.getSettings();
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socket().setReceiveTimeout(global_settings.receive_timeout);
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socket().setSendTimeout(global_settings.send_timeout);
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socket().setNoDelay(true);
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in = std::make_shared<ReadBufferFromPocoSocket>(socket());
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out = std::make_shared<WriteBufferFromPocoSocket>(socket());
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if (in->eof())
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{
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LOG_WARNING(log, "Client has not sent any data.");
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return;
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}
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try
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{
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receiveHello();
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}
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catch (const Exception & e) /// Typical for an incorrect username, password, or address.
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{
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if (e.code() == ErrorCodes::CLIENT_HAS_CONNECTED_TO_WRONG_PORT)
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{
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LOG_DEBUG(log, "Client has connected to wrong port.");
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return;
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}
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if (e.code() == ErrorCodes::ATTEMPT_TO_READ_AFTER_EOF)
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{
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LOG_WARNING(log, "Client has gone away.");
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return;
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}
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try
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{
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/// We try to send error information to the client.
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sendException(e);
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}
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catch (...) {}
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throw;
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}
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/// When connecting, the default database can be specified.
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if (!default_database.empty())
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{
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if (!connection_context.isDatabaseExist(default_database))
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{
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Exception e("Database " + default_database + " doesn't exist", ErrorCodes::UNKNOWN_DATABASE);
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LOG_ERROR(log, "Code: " << e.code() << ", e.displayText() = " << e.displayText()
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<< ", Stack trace:\n\n" << e.getStackTrace().toString());
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sendException(e);
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return;
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}
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connection_context.setCurrentDatabase(default_database);
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}
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sendHello();
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connection_context.setProgressCallback([this] (const Progress & value) { return this->updateProgress(value); });
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while (1)
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{
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/// We are waiting for a packet from the client. Thus, every `POLL_INTERVAL` seconds check whether we need to shut down.
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while (!static_cast<ReadBufferFromPocoSocket &>(*in).poll(global_settings.poll_interval * 1000000) && !server.isCancelled())
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;
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/// If we need to shut down, or client disconnects.
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if (server.isCancelled() || in->eof())
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break;
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Stopwatch watch;
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state.reset();
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/** An exception during the execution of request (it must be sent over the network to the client).
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* The client will be able to accept it, if it did not happen while sending another packet and the client has not disconnected yet.
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*/
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std::unique_ptr<Exception> exception;
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bool network_error = false;
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try
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{
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/// Restore context of request.
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query_context = connection_context;
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/// If a user passed query-local timeouts, reset socket to initial state at the end of the query
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SCOPE_EXIT({state.timeout_setter.reset();});
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/** If Query - process it. If Ping or Cancel - go back to the beginning.
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* There may come settings for a separate query that modify `query_context`.
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*/
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if (!receivePacket())
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continue;
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CurrentThread::initializeQuery();
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/// Should we send internal logs to client?
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if (client_revision >= DBMS_MIN_REVISION_WITH_SERVER_LOGS
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&& query_context.getSettingsRef().send_logs_level.value != "none")
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{
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state.logs_queue = std::make_shared<InternalTextLogsQueue>();
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state.logs_queue->max_priority = Poco::Logger::parseLevel(query_context.getSettingsRef().send_logs_level.value);
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CurrentThread::attachInternalTextLogsQueue(state.logs_queue);
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}
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query_context.setExternalTablesInitializer([&global_settings, this] (Context & context) {
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if (&context != &query_context)
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throw Exception("Unexpected context in external tables initializer", ErrorCodes::LOGICAL_ERROR);
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/// Get blocks of temporary tables
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readData(global_settings);
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/// Reset the input stream, as we received an empty block while receiving external table data.
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/// So, the stream has been marked as cancelled and we can't read from it anymore.
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state.block_in.reset();
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state.maybe_compressed_in.reset(); /// For more accurate accounting by MemoryTracker.
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});
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/// Processing Query
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state.io = executeQuery(state.query, query_context, false, state.stage);
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if (state.io.out)
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state.need_receive_data_for_insert = true;
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after_check_cancelled.restart();
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after_send_progress.restart();
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/// Does the request require receive data from client?
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if (state.need_receive_data_for_insert)
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processInsertQuery(global_settings);
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else
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processOrdinaryQuery();
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sendLogs();
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sendEndOfStream();
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state.reset();
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}
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catch (const Exception & e)
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{
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state.io.onException();
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exception.reset(e.clone());
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if (e.code() == ErrorCodes::UNKNOWN_PACKET_FROM_CLIENT)
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throw;
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/// If a timeout occurred, try to inform client about it and close the session
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if (e.code() == ErrorCodes::SOCKET_TIMEOUT)
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network_error = true;
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}
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catch (const Poco::Net::NetException & e)
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{
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/** We can get here if there was an error during connection to the client,
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* or in connection with a remote server that was used to process the request.
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* It is not possible to distinguish between these two cases.
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* Although in one of them, we have to send exception to the client, but in the other - we can not.
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* We will try to send exception to the client in any case - see below.
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*/
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state.io.onException();
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exception = std::make_unique<Exception>(e.displayText(), ErrorCodes::POCO_EXCEPTION);
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}
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catch (const Poco::Exception & e)
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{
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state.io.onException();
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exception = std::make_unique<Exception>(e.displayText(), ErrorCodes::POCO_EXCEPTION);
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}
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catch (const std::exception & e)
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{
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state.io.onException();
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exception = std::make_unique<Exception>(e.what(), ErrorCodes::STD_EXCEPTION);
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}
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catch (...)
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{
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state.io.onException();
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exception = std::make_unique<Exception>("Unknown exception", ErrorCodes::UNKNOWN_EXCEPTION);
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}
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try
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{
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if (exception)
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{
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try
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{
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/// Try to send logs to client, but it could be risky too
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/// Assume that we can't break output here
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sendLogs();
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}
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catch (...)
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{
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tryLogCurrentException(log, "Can't send logs to client");
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}
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sendException(*exception);
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}
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}
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catch (...)
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{
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/** Could not send exception information to the client. */
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network_error = true;
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LOG_WARNING(log, "Client has gone away.");
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}
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try
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{
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/// It will forcibly detach query even if unexpected error ocсurred and detachQuery() was not called
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CurrentThread::detachQueryIfNotDetached();
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state.reset();
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}
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catch (...)
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{
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/** During the processing of request, there was an exception that we caught and possibly sent to client.
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* When destroying the request pipeline execution there was a second exception.
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* For example, a pipeline could run in multiple threads, and an exception could occur in each of them.
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* Ignore it.
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*/
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}
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watch.stop();
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LOG_INFO(log, std::fixed << std::setprecision(3)
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<< "Processed in " << watch.elapsedSeconds() << " sec.");
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if (network_error)
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break;
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}
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}
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void TCPHandler::readData(const Settings & global_settings)
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{
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auto receive_timeout = query_context.getSettingsRef().receive_timeout.value;
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/// Poll interval should not be greater than receive_timeout
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size_t default_poll_interval = global_settings.poll_interval.value * 1000000;
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size_t current_poll_interval = static_cast<size_t>(receive_timeout.totalMicroseconds());
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constexpr size_t min_poll_interval = 5000; // 5 ms
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size_t poll_interval = std::max(min_poll_interval, std::min(default_poll_interval, current_poll_interval));
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sendLogs();
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while (true)
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{
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Stopwatch watch(CLOCK_MONOTONIC_COARSE);
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/// We are waiting for a packet from the client. Thus, every `POLL_INTERVAL` seconds check whether we need to shut down.
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while (true)
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{
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if (static_cast<ReadBufferFromPocoSocket &>(*in).poll(poll_interval))
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break;
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/// Do we need to shut down?
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if (server.isCancelled())
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return;
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/** Have we waited for data for too long?
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* If we periodically poll, the receive_timeout of the socket itself does not work.
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* Therefore, an additional check is added.
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*/
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double elapsed = watch.elapsedSeconds();
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if (elapsed > receive_timeout.totalSeconds())
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{
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std::stringstream ss;
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ss << "Timeout exceeded while receiving data from client.";
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ss << " Waited for " << static_cast<size_t>(elapsed) << " seconds,";
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ss << " timeout is " << receive_timeout.totalSeconds() << " seconds.";
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throw Exception(ss.str(), ErrorCodes::SOCKET_TIMEOUT);
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}
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}
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/// If client disconnected.
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if (in->eof())
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return;
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/// We accept and process data. And if they are over, then we leave.
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if (!receivePacket())
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break;
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sendLogs();
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}
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}
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void TCPHandler::processInsertQuery(const Settings & global_settings)
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{
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/** Made above the rest of the lines, so that in case of `writePrefix` function throws an exception,
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* client receive exception before sending data.
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*/
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state.io.out->writePrefix();
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/// Send block to the client - table structure.
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Block block = state.io.out->getHeader();
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sendData(block);
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readData(global_settings);
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state.io.out->writeSuffix();
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state.io.onFinish();
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}
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void TCPHandler::processOrdinaryQuery()
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{
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/// Pull query execution result, if exists, and send it to network.
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if (state.io.in)
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{
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/// Send header-block, to allow client to prepare output format for data to send.
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{
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Block header = state.io.in->getHeader();
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if (header)
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sendData(header);
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}
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AsynchronousBlockInputStream async_in(state.io.in);
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async_in.readPrefix();
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while (true)
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{
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Block block;
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while (true)
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{
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if (isQueryCancelled())
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{
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/// A packet was received requesting to stop execution of the request.
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async_in.cancel(false);
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break;
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}
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else
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{
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if (state.progress.rows && after_send_progress.elapsed() / 1000 >= query_context.getSettingsRef().interactive_delay)
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{
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/// Some time passed and there is a progress.
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after_send_progress.restart();
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sendProgress();
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}
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sendLogs();
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if (async_in.poll(query_context.getSettingsRef().interactive_delay / 1000))
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{
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/// There is the following result block.
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block = async_in.read();
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break;
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}
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}
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}
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/** If data has run out, we will send the profiling data and total values to
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* the last zero block to be able to use
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* this information in the suffix output of stream.
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* If the request was interrupted, then `sendTotals` and other methods could not be called,
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* because we have not read all the data yet,
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* and there could be ongoing calculations in other threads at the same time.
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*/
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if (!block && !isQueryCancelled())
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{
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sendTotals();
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sendExtremes();
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sendProfileInfo();
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sendProgress();
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sendLogs();
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}
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sendData(block);
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if (!block)
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break;
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}
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async_in.readSuffix();
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}
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state.io.onFinish();
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}
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void TCPHandler::processTablesStatusRequest()
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{
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TablesStatusRequest request;
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request.read(*in, client_revision);
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TablesStatusResponse response;
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for (const QualifiedTableName & table_name: request.tables)
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{
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StoragePtr table = connection_context.tryGetTable(table_name.database, table_name.table);
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if (!table)
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continue;
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TableStatus status;
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if (auto * replicated_table = dynamic_cast<StorageReplicatedMergeTree *>(table.get()))
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{
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status.is_replicated = true;
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status.absolute_delay = replicated_table->getAbsoluteDelay();
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}
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else
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status.is_replicated = false;
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response.table_states_by_id.emplace(table_name, std::move(status));
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}
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writeVarUInt(Protocol::Server::TablesStatusResponse, *out);
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response.write(*out, client_revision);
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}
|
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void TCPHandler::sendProfileInfo()
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{
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if (const IProfilingBlockInputStream * input = dynamic_cast<const IProfilingBlockInputStream *>(state.io.in.get()))
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{
|
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writeVarUInt(Protocol::Server::ProfileInfo, *out);
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input->getProfileInfo().write(*out);
|
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out->next();
|
||
}
|
||
}
|
||
|
||
|
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void TCPHandler::sendTotals()
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{
|
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if (IProfilingBlockInputStream * input = dynamic_cast<IProfilingBlockInputStream *>(state.io.in.get()))
|
||
{
|
||
const Block & totals = input->getTotals();
|
||
|
||
if (totals)
|
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{
|
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initBlockOutput(totals);
|
||
|
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writeVarUInt(Protocol::Server::Totals, *out);
|
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writeStringBinary("", *out);
|
||
|
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state.block_out->write(totals);
|
||
state.maybe_compressed_out->next();
|
||
out->next();
|
||
}
|
||
}
|
||
}
|
||
|
||
|
||
void TCPHandler::sendExtremes()
|
||
{
|
||
if (IProfilingBlockInputStream * input = dynamic_cast<IProfilingBlockInputStream *>(state.io.in.get()))
|
||
{
|
||
Block extremes = input->getExtremes();
|
||
|
||
if (extremes)
|
||
{
|
||
initBlockOutput(extremes);
|
||
|
||
writeVarUInt(Protocol::Server::Extremes, *out);
|
||
writeStringBinary("", *out);
|
||
|
||
state.block_out->write(extremes);
|
||
state.maybe_compressed_out->next();
|
||
out->next();
|
||
}
|
||
}
|
||
}
|
||
|
||
|
||
void TCPHandler::receiveHello()
|
||
{
|
||
/// Receive `hello` packet.
|
||
UInt64 packet_type = 0;
|
||
String user = "default";
|
||
String password;
|
||
|
||
readVarUInt(packet_type, *in);
|
||
if (packet_type != Protocol::Client::Hello)
|
||
{
|
||
/** If you accidentally accessed the HTTP protocol for a port destined for an internal TCP protocol,
|
||
* Then instead of the packet type, there will be G (GET) or P (POST), in most cases.
|
||
*/
|
||
if (packet_type == 'G' || packet_type == 'P')
|
||
{
|
||
writeString("HTTP/1.0 400 Bad Request\r\n\r\n"
|
||
"Port " + server.config().getString("tcp_port") + " is for clickhouse-client program.\r\n"
|
||
"You must use port " + server.config().getString("http_port") + " for HTTP.\r\n",
|
||
*out);
|
||
|
||
throw Exception("Client has connected to wrong port", ErrorCodes::CLIENT_HAS_CONNECTED_TO_WRONG_PORT);
|
||
}
|
||
else
|
||
throw NetException("Unexpected packet from client", ErrorCodes::UNEXPECTED_PACKET_FROM_CLIENT);
|
||
}
|
||
|
||
readStringBinary(client_name, *in);
|
||
readVarUInt(client_version_major, *in);
|
||
readVarUInt(client_version_minor, *in);
|
||
// NOTE For backward compatibility of the protocol, client cannot send its version_patch.
|
||
readVarUInt(client_revision, *in);
|
||
readStringBinary(default_database, *in);
|
||
readStringBinary(user, *in);
|
||
readStringBinary(password, *in);
|
||
|
||
LOG_DEBUG(log, "Connected " << client_name
|
||
<< " version " << client_version_major
|
||
<< "." << client_version_minor
|
||
<< "." << client_version_patch
|
||
<< ", revision: " << client_revision
|
||
<< (!default_database.empty() ? ", database: " + default_database : "")
|
||
<< (!user.empty() ? ", user: " + user : "")
|
||
<< ".");
|
||
|
||
connection_context.setUser(user, password, socket().peerAddress(), "");
|
||
}
|
||
|
||
|
||
void TCPHandler::sendHello()
|
||
{
|
||
writeVarUInt(Protocol::Server::Hello, *out);
|
||
writeStringBinary(DBMS_NAME, *out);
|
||
writeVarUInt(DBMS_VERSION_MAJOR, *out);
|
||
writeVarUInt(DBMS_VERSION_MINOR, *out);
|
||
writeVarUInt(ClickHouseRevision::get(), *out);
|
||
if (client_revision >= DBMS_MIN_REVISION_WITH_SERVER_TIMEZONE)
|
||
writeStringBinary(DateLUT::instance().getTimeZone(), *out);
|
||
if (client_revision >= DBMS_MIN_REVISION_WITH_SERVER_DISPLAY_NAME)
|
||
writeStringBinary(server_display_name, *out);
|
||
if (client_revision >= DBMS_MIN_REVISION_WITH_VERSION_PATCH)
|
||
writeVarUInt(DBMS_VERSION_PATCH, *out);
|
||
out->next();
|
||
}
|
||
|
||
|
||
bool TCPHandler::receivePacket()
|
||
{
|
||
UInt64 packet_type = 0;
|
||
readVarUInt(packet_type, *in);
|
||
|
||
// std::cerr << "Packet: " << packet_type << std::endl;
|
||
|
||
switch (packet_type)
|
||
{
|
||
case Protocol::Client::Query:
|
||
if (!state.empty())
|
||
throw NetException("Unexpected packet Query received from client", ErrorCodes::UNEXPECTED_PACKET_FROM_CLIENT);
|
||
receiveQuery();
|
||
return true;
|
||
|
||
case Protocol::Client::Data:
|
||
if (state.empty())
|
||
throw NetException("Unexpected packet Data received from client", ErrorCodes::UNEXPECTED_PACKET_FROM_CLIENT);
|
||
return receiveData();
|
||
|
||
case Protocol::Client::Ping:
|
||
writeVarUInt(Protocol::Server::Pong, *out);
|
||
out->next();
|
||
return false;
|
||
|
||
case Protocol::Client::Cancel:
|
||
return false;
|
||
|
||
case Protocol::Client::Hello:
|
||
throw Exception("Unexpected packet " + String(Protocol::Client::toString(packet_type)) + " received from client",
|
||
ErrorCodes::UNEXPECTED_PACKET_FROM_CLIENT);
|
||
|
||
case Protocol::Client::TablesStatusRequest:
|
||
if (!state.empty())
|
||
throw NetException("Unexpected packet TablesStatusRequest received from client", ErrorCodes::UNEXPECTED_PACKET_FROM_CLIENT);
|
||
processTablesStatusRequest();
|
||
out->next();
|
||
return false;
|
||
|
||
default:
|
||
throw Exception("Unknown packet " + toString(packet_type) + " from client", ErrorCodes::UNKNOWN_PACKET_FROM_CLIENT);
|
||
}
|
||
}
|
||
|
||
|
||
void TCPHandler::receiveQuery()
|
||
{
|
||
UInt64 stage = 0;
|
||
UInt64 compression = 0;
|
||
|
||
state.is_empty = false;
|
||
readStringBinary(state.query_id, *in);
|
||
|
||
query_context.setCurrentQueryId(state.query_id);
|
||
|
||
/// Client info
|
||
{
|
||
ClientInfo & client_info = query_context.getClientInfo();
|
||
if (client_revision >= DBMS_MIN_REVISION_WITH_CLIENT_INFO)
|
||
client_info.read(*in, client_revision);
|
||
|
||
/// For better support of old clients, that does not send ClientInfo.
|
||
if (client_info.query_kind == ClientInfo::QueryKind::NO_QUERY)
|
||
{
|
||
client_info.query_kind = ClientInfo::QueryKind::INITIAL_QUERY;
|
||
client_info.client_name = client_name;
|
||
client_info.client_version_major = client_version_major;
|
||
client_info.client_version_minor = client_version_minor;
|
||
client_info.client_version_patch = client_version_patch;
|
||
client_info.client_revision = client_revision;
|
||
}
|
||
|
||
/// Set fields, that are known apriori.
|
||
client_info.interface = ClientInfo::Interface::TCP;
|
||
|
||
if (client_info.query_kind == ClientInfo::QueryKind::INITIAL_QUERY)
|
||
{
|
||
/// 'Current' fields was set at receiveHello.
|
||
client_info.initial_user = client_info.current_user;
|
||
client_info.initial_query_id = client_info.current_query_id;
|
||
client_info.initial_address = client_info.current_address;
|
||
}
|
||
}
|
||
|
||
/// Per query settings.
|
||
Settings & settings = query_context.getSettingsRef();
|
||
settings.deserialize(*in);
|
||
|
||
/// Sync timeouts on client and server during current query to avoid dangling queries on server
|
||
/// NOTE: We use settings.send_timeout for the receive timeout and vice versa (change arguments ordering in TimeoutSetter),
|
||
/// because settings.send_timeout is client-side setting which has opposite meaning on the server side.
|
||
/// NOTE: these settings are applied only for current connection (not for distributed tables' connections)
|
||
state.timeout_setter = std::make_unique<TimeoutSetter>(socket(), settings.receive_timeout, settings.send_timeout);
|
||
|
||
readVarUInt(stage, *in);
|
||
state.stage = QueryProcessingStage::Enum(stage);
|
||
|
||
readVarUInt(compression, *in);
|
||
state.compression = static_cast<Protocol::Compression>(compression);
|
||
|
||
readStringBinary(state.query, *in);
|
||
}
|
||
|
||
|
||
bool TCPHandler::receiveData()
|
||
{
|
||
initBlockInput();
|
||
|
||
/// The name of the temporary table for writing data, default to empty string
|
||
String external_table_name;
|
||
readStringBinary(external_table_name, *in);
|
||
|
||
/// Read one block from the network and write it down
|
||
Block block = state.block_in->read();
|
||
|
||
if (block)
|
||
{
|
||
/// If there is an insert request, then the data should be written directly to `state.io.out`.
|
||
/// Otherwise, we write the blocks in the temporary `external_table_name` table.
|
||
if (!state.need_receive_data_for_insert)
|
||
{
|
||
StoragePtr storage;
|
||
/// If such a table does not exist, create it.
|
||
if (!(storage = query_context.tryGetExternalTable(external_table_name)))
|
||
{
|
||
NamesAndTypesList columns = block.getNamesAndTypesList();
|
||
storage = StorageMemory::create(external_table_name,
|
||
ColumnsDescription{columns, NamesAndTypesList{}, NamesAndTypesList{}, ColumnDefaults{}});
|
||
storage->startup();
|
||
query_context.addExternalTable(external_table_name, storage);
|
||
}
|
||
/// The data will be written directly to the table.
|
||
state.io.out = storage->write(ASTPtr(), query_context.getSettingsRef());
|
||
}
|
||
if (block)
|
||
state.io.out->write(block);
|
||
return true;
|
||
}
|
||
else
|
||
return false;
|
||
}
|
||
|
||
|
||
void TCPHandler::initBlockInput()
|
||
{
|
||
if (!state.block_in)
|
||
{
|
||
if (state.compression == Protocol::Compression::Enable)
|
||
state.maybe_compressed_in = std::make_shared<CompressedReadBuffer>(*in);
|
||
else
|
||
state.maybe_compressed_in = in;
|
||
|
||
state.block_in = std::make_shared<NativeBlockInputStream>(
|
||
*state.maybe_compressed_in,
|
||
client_revision);
|
||
}
|
||
}
|
||
|
||
|
||
void TCPHandler::initBlockOutput(const Block & block)
|
||
{
|
||
if (!state.block_out)
|
||
{
|
||
if (!state.maybe_compressed_out)
|
||
{
|
||
if (state.compression == Protocol::Compression::Enable)
|
||
state.maybe_compressed_out = std::make_shared<CompressedWriteBuffer>(
|
||
*out, CompressionSettings(query_context.getSettingsRef()));
|
||
else
|
||
state.maybe_compressed_out = out;
|
||
}
|
||
|
||
state.block_out = std::make_shared<NativeBlockOutputStream>(
|
||
*state.maybe_compressed_out,
|
||
client_revision,
|
||
block.cloneEmpty());
|
||
}
|
||
}
|
||
|
||
void TCPHandler::initLogsBlockOutput(const Block & block)
|
||
{
|
||
if (!state.logs_block_out)
|
||
{
|
||
/// Use uncompressed stream since log blocks usually contain only one row
|
||
state.logs_block_out = std::make_shared<NativeBlockOutputStream>(
|
||
*out,
|
||
client_revision,
|
||
block.cloneEmpty());
|
||
}
|
||
}
|
||
|
||
|
||
bool TCPHandler::isQueryCancelled()
|
||
{
|
||
if (state.is_cancelled || state.sent_all_data)
|
||
return true;
|
||
|
||
if (after_check_cancelled.elapsed() / 1000 < query_context.getSettingsRef().interactive_delay)
|
||
return false;
|
||
|
||
after_check_cancelled.restart();
|
||
|
||
/// During request execution the only packet that can come from the client is stopping the query.
|
||
if (static_cast<ReadBufferFromPocoSocket &>(*in).poll(0))
|
||
{
|
||
UInt64 packet_type = 0;
|
||
readVarUInt(packet_type, *in);
|
||
|
||
switch (packet_type)
|
||
{
|
||
case Protocol::Client::Cancel:
|
||
if (state.empty())
|
||
throw NetException("Unexpected packet Cancel received from client", ErrorCodes::UNEXPECTED_PACKET_FROM_CLIENT);
|
||
LOG_INFO(log, "Query was cancelled.");
|
||
state.is_cancelled = true;
|
||
return true;
|
||
|
||
default:
|
||
throw NetException("Unknown packet from client", ErrorCodes::UNKNOWN_PACKET_FROM_CLIENT);
|
||
}
|
||
}
|
||
|
||
return false;
|
||
}
|
||
|
||
|
||
void TCPHandler::sendData(const Block & block)
|
||
{
|
||
initBlockOutput(block);
|
||
|
||
writeVarUInt(Protocol::Server::Data, *out);
|
||
/// Send external table name (empty name is the main table)
|
||
writeStringBinary("", *out);
|
||
|
||
state.block_out->write(block);
|
||
state.maybe_compressed_out->next();
|
||
out->next();
|
||
}
|
||
|
||
|
||
void TCPHandler::sendLogData(const Block & block)
|
||
{
|
||
initLogsBlockOutput(block);
|
||
|
||
writeVarUInt(Protocol::Server::Log, *out);
|
||
/// Send log tag (empty tag is the default tag)
|
||
writeStringBinary("", *out);
|
||
|
||
state.logs_block_out->write(block);
|
||
out->next();
|
||
}
|
||
|
||
|
||
void TCPHandler::sendException(const Exception & e)
|
||
{
|
||
writeVarUInt(Protocol::Server::Exception, *out);
|
||
writeException(e, *out);
|
||
out->next();
|
||
}
|
||
|
||
|
||
void TCPHandler::sendEndOfStream()
|
||
{
|
||
state.sent_all_data = true;
|
||
writeVarUInt(Protocol::Server::EndOfStream, *out);
|
||
out->next();
|
||
}
|
||
|
||
|
||
void TCPHandler::updateProgress(const Progress & value)
|
||
{
|
||
state.progress.incrementPiecewiseAtomically(value);
|
||
}
|
||
|
||
|
||
void TCPHandler::sendProgress()
|
||
{
|
||
writeVarUInt(Protocol::Server::Progress, *out);
|
||
auto increment = state.progress.fetchAndResetPiecewiseAtomically();
|
||
increment.write(*out, client_revision);
|
||
out->next();
|
||
}
|
||
|
||
|
||
void TCPHandler::sendLogs()
|
||
{
|
||
if (!state.logs_queue)
|
||
return;
|
||
|
||
MutableColumns logs_columns;
|
||
MutableColumns curr_logs_columns;
|
||
size_t rows = 0;
|
||
|
||
for (; state.logs_queue->tryPop(curr_logs_columns); ++rows)
|
||
{
|
||
if (rows == 0)
|
||
{
|
||
logs_columns = std::move(curr_logs_columns);
|
||
}
|
||
else
|
||
{
|
||
for (size_t j = 0; j < logs_columns.size(); ++j)
|
||
logs_columns[j]->insertRangeFrom(*curr_logs_columns[j], 0, curr_logs_columns[j]->size());
|
||
}
|
||
}
|
||
|
||
if (rows > 0)
|
||
{
|
||
Block block = InternalTextLogsQueue::getSampleBlock();
|
||
block.setColumns(std::move(logs_columns));
|
||
sendLogData(block);
|
||
}
|
||
}
|
||
|
||
|
||
void TCPHandler::run()
|
||
{
|
||
try
|
||
{
|
||
runImpl();
|
||
|
||
LOG_INFO(log, "Done processing connection.");
|
||
}
|
||
catch (Poco::Exception & e)
|
||
{
|
||
/// Timeout - not an error.
|
||
if (!strcmp(e.what(), "Timeout"))
|
||
{
|
||
LOG_DEBUG(log, "Poco::Exception. Code: " << ErrorCodes::POCO_EXCEPTION << ", e.code() = " << e.code()
|
||
<< ", e.displayText() = " << e.displayText() << ", e.what() = " << e.what());
|
||
}
|
||
else
|
||
throw;
|
||
}
|
||
}
|
||
|
||
}
|