2012-03-09 15:46:52 +00:00
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#pragma once
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2017-08-09 14:33:07 +00:00
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#include <Poco/Net/TCPServerConnection.h>
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2018-03-08 07:36:58 +00:00
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#include <Common/getFQDNOrHostName.h>
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2017-08-09 14:33:07 +00:00
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#include <Common/CurrentMetrics.h>
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#include <Common/Stopwatch.h>
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2017-11-24 13:55:31 +00:00
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#include <IO/Progress.h>
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2017-04-01 09:19:00 +00:00
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#include <Core/Protocol.h>
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#include <Core/QueryProcessingStage.h>
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2017-08-09 14:33:07 +00:00
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#include <DataStreams/BlockIO.h>
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2017-04-01 09:19:00 +00:00
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#include <IO/ReadHelpers.h>
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#include <IO/WriteHelpers.h>
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2018-03-28 14:07:28 +00:00
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#include <Client/TimeoutSetter.h>
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2012-03-09 15:46:52 +00:00
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2017-08-09 14:33:07 +00:00
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#include "IServer.h"
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2012-03-09 15:46:52 +00:00
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2016-10-24 04:06:27 +00:00
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namespace CurrentMetrics
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{
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2017-04-01 07:20:54 +00:00
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extern const Metric TCPConnection;
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2016-10-24 04:06:27 +00:00
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}
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2017-09-01 19:04:46 +00:00
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namespace Poco { class Logger; }
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2016-10-24 04:06:27 +00:00
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2012-03-09 15:46:52 +00:00
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namespace DB
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{
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2012-03-11 08:52:56 +00:00
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2016-07-07 01:57:48 +00:00
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/// State of query processing.
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2012-03-11 08:52:56 +00:00
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struct QueryState
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{
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2017-04-01 07:20:54 +00:00
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/// Identifier of the query.
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String query_id;
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QueryProcessingStage::Enum stage = QueryProcessingStage::Complete;
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2017-10-03 14:52:08 +00:00
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Protocol::Compression compression = Protocol::Compression::Disable;
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2017-04-01 07:20:54 +00:00
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/// From where to read data for INSERT.
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std::shared_ptr<ReadBuffer> maybe_compressed_in;
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BlockInputStreamPtr block_in;
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/// Where to write result data.
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std::shared_ptr<WriteBuffer> maybe_compressed_out;
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BlockOutputStreamPtr block_out;
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/// Query text.
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String query;
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/// Streams of blocks, that are processing the query.
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BlockIO io;
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/// Is request cancelled
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bool is_cancelled = false;
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/// empty or not
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bool is_empty = true;
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/// Data was sent.
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bool sent_all_data = false;
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/// Request requires data from the client (INSERT, but not INSERT SELECT).
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bool need_receive_data_for_insert = false;
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/// To output progress, the difference after the previous sending of progress.
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Progress progress;
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2018-03-28 14:07:28 +00:00
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/// Timeouts setter for current query
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std::unique_ptr<TimeoutSetter> timeout_setter;
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2017-04-01 07:20:54 +00:00
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void reset()
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{
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*this = QueryState();
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}
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bool empty()
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{
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return is_empty;
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}
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2012-03-11 08:52:56 +00:00
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};
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2012-03-09 15:46:52 +00:00
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class TCPHandler : public Poco::Net::TCPServerConnection
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{
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public:
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2017-08-09 11:57:09 +00:00
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TCPHandler(IServer & server_, const Poco::Net::StreamSocket & socket_)
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: Poco::Net::TCPServerConnection(socket_)
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, server(server_)
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2017-09-01 19:48:43 +00:00
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, log(&Poco::Logger::get("TCPHandler"))
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2017-08-09 11:57:09 +00:00
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, connection_context(server.context())
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, query_context(server.context())
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2017-04-01 07:20:54 +00:00
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{
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2018-03-08 07:36:58 +00:00
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server_display_name = server.config().getString("display_name", getFQDNOrHostName());
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2017-04-01 07:20:54 +00:00
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}
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2012-03-09 15:46:52 +00:00
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2017-04-01 07:20:54 +00:00
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void run();
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2012-03-09 15:46:52 +00:00
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private:
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2017-08-09 11:57:09 +00:00
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IServer & server;
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2017-09-01 19:04:46 +00:00
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Poco::Logger * log;
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2012-03-09 15:46:52 +00:00
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2017-04-01 07:20:54 +00:00
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String client_name;
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UInt64 client_version_major = 0;
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UInt64 client_version_minor = 0;
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2018-07-31 21:36:18 +00:00
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UInt64 client_version_patch = 0;
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2017-04-01 07:20:54 +00:00
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UInt64 client_revision = 0;
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2013-02-01 19:02:04 +00:00
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2017-04-01 07:20:54 +00:00
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Context connection_context;
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Context query_context;
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2012-05-17 19:15:53 +00:00
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2017-04-01 07:20:54 +00:00
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/// Streams for reading/writing from/to client connection socket.
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std::shared_ptr<ReadBuffer> in;
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std::shared_ptr<WriteBuffer> out;
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2012-05-21 06:49:05 +00:00
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2017-04-01 07:20:54 +00:00
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/// Time after the last check to stop the request and send the progress.
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Stopwatch after_check_cancelled;
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Stopwatch after_send_progress;
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2012-05-30 06:46:57 +00:00
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2017-04-01 07:20:54 +00:00
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String default_database;
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2012-12-06 17:32:48 +00:00
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2017-04-01 07:20:54 +00:00
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/// At the moment, only one ongoing query in the connection is supported at a time.
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QueryState state;
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2012-12-06 17:32:48 +00:00
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2017-04-01 07:20:54 +00:00
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CurrentMetrics::Increment metric_increment{CurrentMetrics::TCPConnection};
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2018-05-07 02:01:11 +00:00
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/// It is the name of the server that will be sent to the client.
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2018-03-08 07:36:58 +00:00
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String server_display_name;
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2012-05-09 08:16:09 +00:00
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2017-04-01 07:20:54 +00:00
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void runImpl();
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2012-03-11 08:52:56 +00:00
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2017-04-01 07:20:54 +00:00
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void receiveHello();
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bool receivePacket();
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void receiveQuery();
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bool receiveData();
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void readData(const Settings & global_settings);
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2012-05-17 19:15:53 +00:00
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2017-04-01 07:20:54 +00:00
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/// Process INSERT query
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void processInsertQuery(const Settings & global_settings);
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2012-05-17 19:15:53 +00:00
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2017-04-01 07:20:54 +00:00
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/// Process a request that does not require the receiving of data blocks from the client
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void processOrdinaryQuery();
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2012-03-11 08:52:56 +00:00
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2017-04-17 16:02:48 +00:00
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void processTablesStatusRequest();
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2017-04-01 07:20:54 +00:00
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void sendHello();
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2018-01-07 00:35:44 +00:00
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void sendData(const Block & block); /// Write a block to the network.
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2017-04-01 07:20:54 +00:00
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void sendException(const Exception & e);
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void sendProgress();
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void sendEndOfStream();
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void sendProfileInfo();
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void sendTotals();
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void sendExtremes();
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2013-09-05 20:22:43 +00:00
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2017-04-01 07:20:54 +00:00
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/// Creates state.block_in/block_out for blocks read/write, depending on whether compression is enabled.
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void initBlockInput();
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2018-02-19 00:45:32 +00:00
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void initBlockOutput(const Block & block);
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2012-05-09 08:16:09 +00:00
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2017-04-01 07:20:54 +00:00
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bool isQueryCancelled();
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2012-07-21 07:02:55 +00:00
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2017-04-01 07:20:54 +00:00
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/// This function is called from different threads.
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void updateProgress(const Progress & value);
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2012-03-09 15:46:52 +00:00
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};
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}
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