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78cb39ff92
ClickHouse/programs/client/Client.cpp
Alexander Kuzmenkov d227f1f706
Merge pull request #13192 from ClickHouse/aku/semicolon-simple 
Simpler version of semicolon-terminated VALUES #12999 w/o `pos` changes
2020-09-11 11:51:52 +03:00

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#include "TestHint.h"
#include "ConnectionParameters.h"
#include "QueryFuzzer.h"
#include "Suggest.h"
#if USE_REPLXX
# include <common/ReplxxLineReader.h>
#elif defined(USE_READLINE) && USE_READLINE
# include <common/ReadlineLineReader.h>
#else
# include <common/LineReader.h>
#endif
#include <stdlib.h>
#include <fcntl.h>
#include <signal.h>
#include <map>
#include <iostream>
#include <fstream>
#include <iomanip>
#include <unordered_set>
#include <algorithm>
#include <optional>
#include <ext/scope_guard.h>
#include <boost/program_options.hpp>
#include <boost/algorithm/string/replace.hpp>
#include <Poco/String.h>
#include <Poco/File.h>
#include <Poco/Util/Application.h>
#include <common/find_symbols.h>
#include <common/LineReader.h>
#include <Common/ClickHouseRevision.h>
#include <Common/Stopwatch.h>
#include <Common/Exception.h>
#include <Common/ShellCommand.h>
#include <Common/UnicodeBar.h>
#include <Common/formatReadable.h>
#include <Common/NetException.h>
#include <Common/Throttler.h>
#include <Common/StringUtils/StringUtils.h>
#include <Common/typeid_cast.h>
#include <Common/clearPasswordFromCommandLine.h>
#include <Common/Config/ConfigProcessor.h>
#include <Common/PODArray.h>
#include <Core/Types.h>
#include <Core/QueryProcessingStage.h>
#include <Core/ExternalTable.h>
#include <IO/ReadBufferFromFileDescriptor.h>
#include <IO/WriteBufferFromFileDescriptor.h>
#include <IO/WriteBufferFromFile.h>
#include <IO/ReadBufferFromMemory.h>
#include <IO/ReadBufferFromString.h>
#include <IO/ReadHelpers.h>
#include <IO/WriteHelpers.h>
#include <IO/Operators.h>
#include <IO/UseSSL.h>
#include <DataStreams/AsynchronousBlockInputStream.h>
#include <DataStreams/AddingDefaultsBlockInputStream.h>
#include <DataStreams/InternalTextLogsRowOutputStream.h>
#include <Parsers/ASTCreateQuery.h>
#include <Parsers/ASTSetQuery.h>
#include <Parsers/ASTUseQuery.h>
#include <Parsers/ASTInsertQuery.h>
#include <Parsers/ASTSelectWithUnionQuery.h>
#include <Parsers/ASTQueryWithOutput.h>
#include <Parsers/ASTLiteral.h>
#include <Parsers/ASTIdentifier.h>
#include <Parsers/formatAST.h>
#include <Parsers/parseQuery.h>
#include <Parsers/ParserQuery.h>
#include <Interpreters/Context.h>
#include <Interpreters/InterpreterSetQuery.h>
#include <Interpreters/ReplaceQueryParameterVisitor.h>
#include <Client/Connection.h>
#include <Common/InterruptListener.h>
#include <Functions/registerFunctions.h>
#include <AggregateFunctions/registerAggregateFunctions.h>
#include <Common/Config/configReadClient.h>
#include <Storages/ColumnsDescription.h>
#include <common/argsToConfig.h>
#include <Common/TerminalSize.h>
#include <Common/UTF8Helpers.h>
#if !defined(ARCADIA_BUILD)
# include <Common/config_version.h>
#endif
#ifndef __clang__
#pragma GCC optimize("-fno-var-tracking-assignments")
#endif
/// http://en.wikipedia.org/wiki/ANSI_escape_code
#define CLEAR_TO_END_OF_LINE "\033[K"
namespace DB
{
namespace ErrorCodes
{
extern const int NETWORK_ERROR;
extern const int NO_DATA_TO_INSERT;
extern const int BAD_ARGUMENTS;
extern const int UNKNOWN_PACKET_FROM_SERVER;
extern const int UNEXPECTED_PACKET_FROM_SERVER;
extern const int CLIENT_OUTPUT_FORMAT_SPECIFIED;
extern const int INVALID_USAGE_OF_INPUT;
extern const int DEADLOCK_AVOIDED;
extern const int UNRECOGNIZED_ARGUMENTS;
}
class Client : public Poco::Util::Application
{
public:
Client() = default;
private:
using StringSet = std::unordered_set<String>;
StringSet exit_strings
{
"exit", "quit", "logout",
"учше", "йгше", "дщпщге",
"exit;", "quit;", "logout;",
"учшеж", "йгшеж", "дщпщгеж",
"q", "й", "\\q", "\\Q", "\\й", "\\Й", ":q", "Жй"
};
bool is_interactive = true; /// Use either interactive line editing interface or batch mode.
bool need_render_progress = true; /// Render query execution progress.
bool echo_queries = false; /// Print queries before execution in batch mode.
bool ignore_error = false; /// In case of errors, don't print error message, continue to next query. Only applicable for non-interactive mode.
bool print_time_to_stderr = false; /// Output execution time to stderr in batch mode.
bool stdin_is_a_tty = false; /// stdin is a terminal.
bool stdout_is_a_tty = false; /// stdout is a terminal.
std::unique_ptr<Connection> connection; /// Connection to DB.
String query_id; /// Current query_id.
String full_query; /// Current query as it was given to the client.
// Current query as it will be sent to the server. It may differ from the
// full query for INSERT queries, for which the data that follows the query
// is stripped and sent separately.
String query_to_send;
String format; /// Query results output format.
bool is_default_format = true; /// false, if format is set in the config or command line.
size_t format_max_block_size = 0; /// Max block size for console output.
String insert_format; /// Format of INSERT data that is read from stdin in batch mode.
size_t insert_format_max_block_size = 0; /// Max block size when reading INSERT data.
size_t max_client_network_bandwidth = 0; /// The maximum speed of data exchange over the network for the client in bytes per second.
bool has_vertical_output_suffix = false; /// Is \G present at the end of the query string?
SharedContextHolder shared_context = Context::createShared();
Context context = Context::createGlobal(shared_context.get());
/// Buffer that reads from stdin in batch mode.
ReadBufferFromFileDescriptor std_in {STDIN_FILENO};
/// Console output.
WriteBufferFromFileDescriptor std_out {STDOUT_FILENO};
std::unique_ptr<ShellCommand> pager_cmd;
/// The user can specify to redirect query output to a file.
std::optional<WriteBufferFromFile> out_file_buf;
BlockOutputStreamPtr block_out_stream;
/// The user could specify special file for server logs (stderr by default)
std::unique_ptr<WriteBuffer> out_logs_buf;
String server_logs_file;
BlockOutputStreamPtr logs_out_stream;
String home_path;
String current_profile;
String prompt_by_server_display_name;
/// Path to a file containing command history.
String history_file;
/// How many rows have been read or written.
size_t processed_rows = 0;
/// Parsed query. Is used to determine some settings (e.g. format, output file).
ASTPtr parsed_query;
/// The last exception that was received from the server. Is used for the return code in batch mode.
std::unique_ptr<Exception> last_exception_received_from_server;
/// If the last query resulted in exception.
bool received_exception_from_server = false;
int expected_server_error = 0;
int expected_client_error = 0;
int actual_server_error = 0;
int actual_client_error = 0;
UInt64 server_revision = 0;
String server_version;
String server_display_name;
Stopwatch watch;
/// The server periodically sends information about how much data was read since last time.
Progress progress;
bool show_progress_bar = false;
size_t written_progress_chars = 0;
bool written_first_block = false;
/// External tables info.
std::list<ExternalTable> external_tables;
/// Dictionary with query parameters for prepared statements.
NameToNameMap query_parameters;
ConnectionParameters connection_parameters;
QueryFuzzer fuzzer;
int query_fuzzer_runs = 0;
void initialize(Poco::Util::Application & self) override
{
Poco::Util::Application::initialize(self);
const char * home_path_cstr = getenv("HOME");
if (home_path_cstr)
home_path = home_path_cstr;
configReadClient(config(), home_path);
context.setApplicationType(Context::ApplicationType::CLIENT);
context.setQueryParameters(query_parameters);
/// settings and limits could be specified in config file, but passed settings has higher priority
for (const auto & setting : context.getSettingsRef().allUnchanged())
{
const auto & name = setting.getName();
if (config().has(name))
context.setSetting(name, config().getString(name));
}
/// Set path for format schema files
if (config().has("format_schema_path"))
context.setFormatSchemaPath(Poco::Path(config().getString("format_schema_path")).toString());
}
int main(const std::vector<std::string> & /*args*/) override
{
try
{
return mainImpl();
}
catch (const Exception & e)
{
bool print_stack_trace = config().getBool("stacktrace", false);
std::string text = e.displayText();
/** If exception is received from server, then stack trace is embedded in message.
* If exception is thrown on client, then stack trace is in separate field.
*/
auto embedded_stack_trace_pos = text.find("Stack trace");
if (std::string::npos != embedded_stack_trace_pos && !print_stack_trace)
text.resize(embedded_stack_trace_pos);
std::cerr << "Code: " << e.code() << ". " << text << std::endl << std::endl;
/// Don't print the stack trace on the client if it was logged on the server.
/// Also don't print the stack trace in case of network errors.
if (print_stack_trace
&& e.code() != ErrorCodes::NETWORK_ERROR
&& std::string::npos == embedded_stack_trace_pos)
{
std::cerr << "Stack trace:" << std::endl
<< e.getStackTraceString();
}
/// If exception code isn't zero, we should return non-zero return code anyway.
return e.code() ? e.code() : -1;
}
catch (...)
{
std::cerr << getCurrentExceptionMessage(false) << std::endl;
return getCurrentExceptionCode();
}
}
/// Should we celebrate a bit?
static bool isNewYearMode()
{
time_t current_time = time(nullptr);
/// It's bad to be intrusive.
if (current_time % 3 != 0)
return false;
LocalDate now(current_time);
return (now.month() == 12 && now.day() >= 20)
|| (now.month() == 1 && now.day() <= 5);
}
static bool isChineseNewYearMode(const String & local_tz)
{
/// Days of Dec. 20 in Chinese calendar starting from year 2019 to year 2105
static constexpr UInt16 chineseNewYearIndicators[]
= {18275, 18659, 19014, 19368, 19752, 20107, 20491, 20845, 21199, 21583, 21937, 22292, 22676, 23030, 23414, 23768, 24122, 24506,
24860, 25215, 25599, 25954, 26308, 26692, 27046, 27430, 27784, 28138, 28522, 28877, 29232, 29616, 29970, 30354, 30708, 31062,
31446, 31800, 32155, 32539, 32894, 33248, 33632, 33986, 34369, 34724, 35078, 35462, 35817, 36171, 36555, 36909, 37293, 37647,
38002, 38386, 38740, 39095, 39479, 39833, 40187, 40571, 40925, 41309, 41664, 42018, 42402, 42757, 43111, 43495, 43849, 44233,
44587, 44942, 45326, 45680, 46035, 46418, 46772, 47126, 47510, 47865, 48249, 48604, 48958, 49342};
/// All time zone names are acquired from https://www.iana.org/time-zones
static constexpr const char * chineseNewYearTimeZoneIndicators[] = {
/// Time zones celebrating Chinese new year.
"Asia/Shanghai",
"Asia/Chongqing",
"Asia/Harbin",
"Asia/Urumqi",
"Asia/Hong_Kong",
"Asia/Chungking",
"Asia/Macao",
"Asia/Macau",
"Asia/Taipei",
"Asia/Singapore",
/// Time zones celebrating Chinese new year but with different festival names. Let's not print the message for now.
// "Asia/Brunei",
// "Asia/Ho_Chi_Minh",
// "Asia/Hovd",
// "Asia/Jakarta",
// "Asia/Jayapura",
// "Asia/Kashgar",
// "Asia/Kuala_Lumpur",
// "Asia/Kuching",
// "Asia/Makassar",
// "Asia/Pontianak",
// "Asia/Pyongyang",
// "Asia/Saigon",
// "Asia/Seoul",
// "Asia/Ujung_Pandang",
// "Asia/Ulaanbaatar",
// "Asia/Ulan_Bator",
};
static constexpr size_t M = sizeof(chineseNewYearTimeZoneIndicators) / sizeof(chineseNewYearTimeZoneIndicators[0]);
time_t current_time = time(nullptr);
if (chineseNewYearTimeZoneIndicators + M
== std::find_if(chineseNewYearTimeZoneIndicators, chineseNewYearTimeZoneIndicators + M, [&local_tz](const char * tz)
{
return tz == local_tz;
}))
return false;
/// It's bad to be intrusive.
if (current_time % 3 != 0)
return false;
auto days = DateLUT::instance().toDayNum(current_time).toUnderType();
for (auto d : chineseNewYearIndicators)
{
/// Let's celebrate until Lantern Festival
if (d <= days && d + 25u >= days)
return true;
else if (d > days)
return false;
}
return false;
}
#if USE_REPLXX
static void highlight(const String & query, std::vector<replxx::Replxx::Color> & colors)
{
using namespace replxx;
static const std::unordered_map<TokenType, Replxx::Color> token_to_color =
{
{ TokenType::Whitespace, Replxx::Color::DEFAULT },
{ TokenType::Comment, Replxx::Color::GRAY },
{ TokenType::BareWord, Replxx::Color::DEFAULT },
{ TokenType::Number, Replxx::Color::GREEN },
{ TokenType::StringLiteral, Replxx::Color::CYAN },
{ TokenType::QuotedIdentifier, Replxx::Color::MAGENTA },
{ TokenType::OpeningRoundBracket, Replxx::Color::BROWN },
{ TokenType::ClosingRoundBracket, Replxx::Color::BROWN },
{ TokenType::OpeningSquareBracket, Replxx::Color::BROWN },
{ TokenType::ClosingSquareBracket, Replxx::Color::BROWN },
{ TokenType::OpeningCurlyBrace, Replxx::Color::INTENSE },
{ TokenType::ClosingCurlyBrace, Replxx::Color::INTENSE },
{ TokenType::Comma, Replxx::Color::INTENSE },
{ TokenType::Semicolon, Replxx::Color::INTENSE },
{ TokenType::Dot, Replxx::Color::INTENSE },
{ TokenType::Asterisk, Replxx::Color::INTENSE },
{ TokenType::Plus, Replxx::Color::INTENSE },
{ TokenType::Minus, Replxx::Color::INTENSE },
{ TokenType::Slash, Replxx::Color::INTENSE },
{ TokenType::Percent, Replxx::Color::INTENSE },
{ TokenType::Arrow, Replxx::Color::INTENSE },
{ TokenType::QuestionMark, Replxx::Color::INTENSE },
{ TokenType::Colon, Replxx::Color::INTENSE },
{ TokenType::Equals, Replxx::Color::INTENSE },
{ TokenType::NotEquals, Replxx::Color::INTENSE },
{ TokenType::Less, Replxx::Color::INTENSE },
{ TokenType::Greater, Replxx::Color::INTENSE },
{ TokenType::LessOrEquals, Replxx::Color::INTENSE },
{ TokenType::GreaterOrEquals, Replxx::Color::INTENSE },
{ TokenType::Concatenation, Replxx::Color::INTENSE },
{ TokenType::At, Replxx::Color::INTENSE },
{ TokenType::DoubleAt, Replxx::Color::MAGENTA },
{ TokenType::EndOfStream, Replxx::Color::DEFAULT },
{ TokenType::Error, Replxx::Color::RED },
{ TokenType::ErrorMultilineCommentIsNotClosed, Replxx::Color::RED },
{ TokenType::ErrorSingleQuoteIsNotClosed, Replxx::Color::RED },
{ TokenType::ErrorDoubleQuoteIsNotClosed, Replxx::Color::RED },
{ TokenType::ErrorSinglePipeMark, Replxx::Color::RED },
{ TokenType::ErrorWrongNumber, Replxx::Color::RED },
{ TokenType::ErrorMaxQuerySizeExceeded, Replxx::Color::RED }
};
const Replxx::Color unknown_token_color = Replxx::Color::RED;
Lexer lexer(query.data(), query.data() + query.size());
size_t pos = 0;
for (Token token = lexer.nextToken(); !token.isEnd(); token = lexer.nextToken())
{
size_t utf8_len = UTF8::countCodePoints(reinterpret_cast<const UInt8 *>(token.begin), token.size());
for (size_t code_point_index = 0; code_point_index < utf8_len; ++code_point_index)
{
if (token_to_color.find(token.type) != token_to_color.end())
colors[pos + code_point_index] = token_to_color.at(token.type);
else
colors[pos + code_point_index] = unknown_token_color;
}
pos += utf8_len;
}
}
#endif
int mainImpl()
{
UseSSL use_ssl;
registerFunctions();
registerAggregateFunctions();
/// Batch mode is enabled if one of the following is true:
/// - -e (--query) command line option is present.
/// The value of the option is used as the text of query (or of multiple queries).
/// If stdin is not a terminal, INSERT data for the first query is read from it.
/// - stdin is not a terminal. In this case queries are read from it.
if (!stdin_is_a_tty || config().has("query"))
is_interactive = false;
std::cout << std::fixed << std::setprecision(3);
std::cerr << std::fixed << std::setprecision(3);
if (is_interactive)
showClientVersion();
is_default_format = !config().has("vertical") && !config().has("format");
if (config().has("vertical"))
format = config().getString("format", "Vertical");
else
format = config().getString("format", is_interactive ? "PrettyCompact" : "TabSeparated");
format_max_block_size = config().getInt("format_max_block_size", context.getSettingsRef().max_block_size);
insert_format = "Values";
/// Setting value from cmd arg overrides one from config
if (context.getSettingsRef().max_insert_block_size.changed)
insert_format_max_block_size = context.getSettingsRef().max_insert_block_size;
else
insert_format_max_block_size = config().getInt("insert_format_max_block_size", context.getSettingsRef().max_insert_block_size);
if (!is_interactive)
{
need_render_progress = config().getBool("progress", false);
echo_queries = config().getBool("echo", false);
ignore_error = config().getBool("ignore-error", false);
}
ClientInfo & client_info = context.getClientInfo();
client_info.setInitialQuery();
client_info.quota_key = config().getString("quota_key", "");
connect();
/// Initialize DateLUT here to avoid counting time spent here as query execution time.
const auto local_tz = DateLUT::instance().getTimeZone();
if (!context.getSettingsRef().use_client_time_zone)
{
const auto & time_zone = connection->getServerTimezone(connection_parameters.timeouts);
if (!time_zone.empty())
{
try
{
DateLUT::setDefaultTimezone(time_zone);
}
catch (...)
{
std::cerr << "Warning: could not switch to server time zone: " << time_zone
<< ", reason: " << getCurrentExceptionMessage(/* with_stacktrace = */ false) << std::endl
<< "Proceeding with local time zone."
<< std::endl << std::endl;
}
}
else
{
std::cerr << "Warning: could not determine server time zone. "
<< "Proceeding with local time zone."
<< std::endl << std::endl;
}
}
Strings keys;
prompt_by_server_display_name = config().getRawString("prompt_by_server_display_name.default", "{display_name} :) ");
config().keys("prompt_by_server_display_name", keys);
for (const String & key : keys)
{
if (key != "default" && server_display_name.find(key) != std::string::npos)
{
prompt_by_server_display_name = config().getRawString("prompt_by_server_display_name." + key);
break;
}
}
/// Prompt may contain escape sequences including \e[ or \x1b[ sequences to set terminal color.
{
String unescaped_prompt_by_server_display_name;
ReadBufferFromString in(prompt_by_server_display_name);
readEscapedString(unescaped_prompt_by_server_display_name, in);
prompt_by_server_display_name = std::move(unescaped_prompt_by_server_display_name);
}
/// Prompt may contain the following substitutions in a form of {name}.
std::map<String, String> prompt_substitutions
{
{"host", connection_parameters.host},
{"port", toString(connection_parameters.port)},
{"user", connection_parameters.user},
{"display_name", server_display_name},
};
/// Quite suboptimal.
for (const auto & [key, value]: prompt_substitutions)
boost::replace_all(prompt_by_server_display_name, "{" + key + "}", value);
if (is_interactive)
{
if (!query_id.empty())
throw Exception("query_id could be specified only in non-interactive mode", ErrorCodes::BAD_ARGUMENTS);
if (print_time_to_stderr)
throw Exception("time option could be specified only in non-interactive mode", ErrorCodes::BAD_ARGUMENTS);
if (server_revision >= Suggest::MIN_SERVER_REVISION && !config().getBool("disable_suggestion", false))
{
/// Load suggestion data from the server.
Suggest::instance().load(connection_parameters, config().getInt("suggestion_limit"));
}
/// Load command history if present.
if (config().has("history_file"))
history_file = config().getString("history_file");
else
{
auto * history_file_from_env = getenv("CLICKHOUSE_HISTORY_FILE");
if (history_file_from_env)
history_file = history_file_from_env;
else if (!home_path.empty())
history_file = home_path + "/.clickhouse-client-history";
}
if (!history_file.empty() && !Poco::File(history_file).exists())
Poco::File(history_file).createFile();
LineReader::Patterns query_extenders = {"\\"};
LineReader::Patterns query_delimiters = {";", "\\G"};
#if USE_REPLXX
replxx::Replxx::highlighter_callback_t highlight_callback{};
if (config().getBool("highlight"))
highlight_callback = highlight;
ReplxxLineReader lr(
Suggest::instance(),
history_file,
config().has("multiline"),
query_extenders,
query_delimiters,
highlight_callback);
#elif defined(USE_READLINE) && USE_READLINE
ReadlineLineReader lr(Suggest::instance(), history_file, config().has("multiline"), query_extenders, query_delimiters);
#else
LineReader lr(history_file, config().has("multiline"), query_extenders, query_delimiters);
#endif
/// Enable bracketed-paste-mode only when multiquery is enabled and multiline is
/// disabled, so that we are able to paste and execute multiline queries in a whole
/// instead of erroring out, while be less intrusive.
if (config().has("multiquery") && !config().has("multiline"))
lr.enableBracketedPaste();
do
{
auto input = lr.readLine(prompt(), ":-] ");
if (input.empty())
break;
has_vertical_output_suffix = false;
if (input.ends_with("\\G"))
{
input.resize(input.size() - 2);
has_vertical_output_suffix = true;
}
try
{
if (!processQueryText(input))
break;
}
catch (const Exception & e)
{
actual_client_error = e.code();
if (!actual_client_error || actual_client_error != expected_client_error)
{
std::cerr << std::endl
<< "Exception on client:" << std::endl
<< "Code: " << e.code() << ". " << e.displayText() << std::endl;
if (config().getBool("stacktrace", false))
std::cerr << "Stack trace:" << std::endl << e.getStackTraceString() << std::endl;
std::cerr << std::endl;
}
/// Client-side exception during query execution can result in the loss of
/// sync in the connection protocol.
/// So we reconnect and allow to enter the next query.
connect();
}
}
while (true);
if (isNewYearMode())
std::cout << "Happy new year." << std::endl;
else if (isChineseNewYearMode(local_tz))
std::cout << "Happy Chinese new year. 春节快乐!" << std::endl;
else
std::cout << "Bye." << std::endl;
return 0;
}
else
{
query_id = config().getString("query_id", "");
if (query_fuzzer_runs)
{
nonInteractiveWithFuzzing();
}
else
{
nonInteractive();
}
/// If exception code isn't zero, we should return non-zero return code anyway.
if (last_exception_received_from_server)
return last_exception_received_from_server->code() != 0 ? last_exception_received_from_server->code() : -1;
return 0;
}
}
void connect()
{
connection_parameters = ConnectionParameters(config());
if (is_interactive)
std::cout << "Connecting to "
<< (!connection_parameters.default_database.empty() ? "database " + connection_parameters.default_database + " at " : "")
<< connection_parameters.host << ":" << connection_parameters.port
<< (!connection_parameters.user.empty() ? " as user " + connection_parameters.user : "")
<< "." << std::endl;
connection = std::make_unique<Connection>(
connection_parameters.host,
connection_parameters.port,
connection_parameters.default_database,
connection_parameters.user,
connection_parameters.password,
"client",
connection_parameters.compression,
connection_parameters.security);
String server_name;
UInt64 server_version_major = 0;
UInt64 server_version_minor = 0;
UInt64 server_version_patch = 0;
if (max_client_network_bandwidth)
{
ThrottlerPtr throttler = std::make_shared<Throttler>(max_client_network_bandwidth, 0, "");
connection->setThrottler(throttler);
}
connection->getServerVersion(connection_parameters.timeouts,
server_name, server_version_major, server_version_minor, server_version_patch, server_revision);
server_version = toString(server_version_major) + "." + toString(server_version_minor) + "." + toString(server_version_patch);
if (server_display_name = connection->getServerDisplayName(connection_parameters.timeouts); server_display_name.empty())
{
server_display_name = config().getString("host", "localhost");
}
if (is_interactive)
{
std::cout << "Connected to " << server_name
<< " server version " << server_version
<< " revision " << server_revision
<< "." << std::endl << std::endl;
auto client_version_tuple = std::make_tuple(VERSION_MAJOR, VERSION_MINOR, VERSION_PATCH);
auto server_version_tuple = std::make_tuple(server_version_major, server_version_minor, server_version_patch);
if (client_version_tuple < server_version_tuple)
{
std::cout << "ClickHouse client version is older than ClickHouse server. "
<< "It may lack support for new features."
<< std::endl << std::endl;
}
else if (client_version_tuple > server_version_tuple)
{
std::cout << "ClickHouse server version is older than ClickHouse client. "
<< "It may indicate that the server is out of date and can be upgraded."
<< std::endl << std::endl;
}
}
}
inline String prompt() const
{
return boost::replace_all_copy(prompt_by_server_display_name, "{database}", config().getString("database", "default"));
}
void nonInteractive()
{
String text;
if (config().has("query"))
text = config().getRawString("query"); /// Poco configuration should not process substitutions in form of ${...} inside query.
else
{
/// If 'query' parameter is not set, read a query from stdin.
/// The query is read entirely into memory (streaming is disabled).
ReadBufferFromFileDescriptor in(STDIN_FILENO);
readStringUntilEOF(text, in);
}
processQueryText(text);
}
void nonInteractiveWithFuzzing()
{
if (config().has("query"))
{
// Poco configuration should not process substitutions in form of
// ${...} inside query
processWithFuzzing(config().getRawString("query"));
return;
}
// Try to stream the queries from stdin, without reading all of them
// into memory. The interface of the parser does not support streaming,
// in particular, it can't distinguish the end of partial input buffer
// and the final end of input file. This means we have to try to split
// the input into separate queries here. Two patterns of input are
// especially interesting:
// 1) multiline query:
// select 1
// from system.numbers;
//
// 2) csv insert with in-place data:
// insert into t format CSV 1;2
//
// (1) means we can't split on new line, and (2) means we can't split on
// semicolon. Solution: split on ';\n'. This sequence is frequent enough
// in the SQL tests which are our principal input for fuzzing. Now we
// have another interesting case:
// 3) escaped semicolon followed by newline, e.g.
// select ';
// '
//
// To handle (3), parse until we can, and read more data if the parser
// complains. Hopefully this should be enough...
ReadBufferFromFileDescriptor in(STDIN_FILENO);
std::string text;
while (!in.eof())
{
// Read until separator.
while (!in.eof())
{
char * next_separator = find_first_symbols<';'>(in.position(),
in.buffer().end());
if (next_separator < in.buffer().end())
{
next_separator++;
if (next_separator < in.buffer().end()
&& *next_separator == '\n')
{
// Found ';\n', append it to the query text and try to
// parse.
next_separator++;
text.append(in.position(), next_separator - in.position());
in.position() = next_separator;
break;
}
}
// Didn't find the semicolon and reached the end of buffer.
text.append(in.position(), next_separator - in.position());
in.position() = next_separator;
if (text.size() > 1024 * 1024)
{
// We've read a lot of text and still haven't seen a separator.
// Likely some pathological input, just fall through to prevent
// too long loops.
break;
}
}
// Parse and execute what we've read.
const auto * new_end = processWithFuzzing(text);
if (new_end > &text[0])
{
const auto rest_size = text.size() - (new_end - &text[0]);
memcpy(&text[0], new_end, rest_size);
text.resize(rest_size);
}
else
{
// We didn't read enough text to parse a query. Will read more.
}
// Ensure that we're still connected to the server. If the server died,
// the reconnect is going to fail with an exception, and the fuzzer
// will exit. The ping() would be the best match here, but it's
// private, probably for a good reason that the protocol doesn't allow
// pings at any possible moment.
// Don't forget to reset the default database which might have changed.
connection->setDefaultDatabase("");
connection->forceConnected(connection_parameters.timeouts);
if (text.size() > 4 * 1024)
{
// Some pathological situation where the text is larger than 4kB
// and we still cannot parse a single query in it. Abort.
std::cerr << "Read too much text and still can't parse a query."
" Aborting." << std::endl;
exit(1);
}
}
}
bool processQueryText(const String & text)
{
if (exit_strings.end() != exit_strings.find(trim(text, [](char c){ return isWhitespaceASCII(c) || c == ';'; })))
return false;
if (!config().has("multiquery"))
{
assert(!query_fuzzer_runs);
processTextAsSingleQuery(text);
return true;
}
if (query_fuzzer_runs)
{
processWithFuzzing(text);
return true;
}
return processMultiQuery(text);
}
bool processMultiQuery(const String & all_queries_text)
{
const bool test_mode = config().has("testmode");
{ /// disable logs if expects errors
TestHint test_hint(test_mode, all_queries_text);
if (test_hint.clientError() || test_hint.serverError())
processTextAsSingleQuery("SET send_logs_level = 'none'");
}
/// Several queries separated by ';'.
/// INSERT data is ended by the end of line, not ';'.
/// An exception is VALUES format where we also support semicolon in
/// addition to end of line.
const char * this_query_begin = all_queries_text.data();
const char * all_queries_end = all_queries_text.data() + all_queries_text.size();
while (this_query_begin < all_queries_end)
{
// Use the token iterator to skip any whitespace, semicolons and
// comments at the beginning of the query. An example from regression
// tests:
// insert into table t values ('invalid'); -- { serverError 469 }
// select 1
// Here the test hint comment gets parsed as a part of second query.
// We parse the `INSERT VALUES` up to the semicolon, and the rest
// looks like a two-line query:
// -- { serverError 469 }
// select 1
// and we expect it to fail with error 469, but this hint is actually
// for the previous query. Test hints should go after the query, so
// we can fix this by skipping leading comments. Token iterator skips
// comments and whitespace by itself, so we only have to check for
// semicolons.
// The code block is to limit visibility of `tokens` because we have
// another such variable further down the code, and get warnings for
// that.
{
Tokens tokens(this_query_begin, all_queries_end);
IParser::Pos token_iterator(tokens,
context.getSettingsRef().max_parser_depth);
while (token_iterator->type == TokenType::Semicolon
&& token_iterator.isValid())
{
++token_iterator;
}
this_query_begin = token_iterator->begin;
if (this_query_begin >= all_queries_end)
{
break;
}
}
// Try to parse the query.
const char * this_query_end = this_query_begin;
parsed_query = parseQuery(this_query_end, all_queries_end, true);
if (!parsed_query)
{
if (ignore_error)
{
Tokens tokens(this_query_begin, all_queries_end);
IParser::Pos token_iterator(tokens, context.getSettingsRef().max_parser_depth);
while (token_iterator->type != TokenType::Semicolon && token_iterator.isValid())
++token_iterator;
this_query_begin = token_iterator->end;
continue;
}
return true;
}
// INSERT queries may have the inserted data in the query text
// that follow the query itself, e.g. "insert into t format CSV 1;2".
// They need special handling. First of all, here we find where the
// inserted data ends. In multy-query mode, it is delimited by a
// newline.
// The VALUES format needs even more handling -- we also allow the
// data to be delimited by semicolon. This case is handled later by
// the format parser itself.
auto * insert_ast = parsed_query->as<ASTInsertQuery>();
if (insert_ast && insert_ast->data)
{
this_query_end = find_first_symbols<'\n'>(insert_ast->data, all_queries_end);
insert_ast->end = this_query_end;
query_to_send = all_queries_text.substr(
this_query_begin - all_queries_text.data(),
insert_ast->data - this_query_begin);
}
else
{
query_to_send = all_queries_text.substr(
this_query_begin - all_queries_text.data(),
this_query_end - this_query_begin);
}
// full_query is the query + inline INSERT data.
full_query = all_queries_text.substr(
this_query_begin - all_queries_text.data(),
this_query_end - this_query_begin);
// Look for the hint in the text of query + insert data, if any.
// e.g. insert into t format CSV 'a' -- { serverError 123 }.
TestHint test_hint(test_mode, full_query);
expected_client_error = test_hint.clientError();
expected_server_error = test_hint.serverError();
try
{
processParsedSingleQuery();
if (insert_ast && insert_ast->data)
{
// For VALUES format: use the end of inline data as reported
// by the format parser (it is saved in sendData()). This
// allows us to handle queries like:
// insert into t values (1); select 1
//, where the inline data is delimited by semicolon and not
// by a newline.
this_query_end = parsed_query->as<ASTInsertQuery>()->end;
}
}
catch (...)
{
last_exception_received_from_server = std::make_unique<Exception>(getCurrentExceptionMessage(true), getCurrentExceptionCode());
actual_client_error = last_exception_received_from_server->code();
if (!ignore_error && (!actual_client_error || actual_client_error != expected_client_error))
std::cerr << "Error on processing query: " << full_query << std::endl << last_exception_received_from_server->message();
received_exception_from_server = true;
}
if (!test_hint.checkActual(actual_server_error, actual_client_error, received_exception_from_server, last_exception_received_from_server))
connection->forceConnected(connection_parameters.timeouts);
if (received_exception_from_server && !ignore_error)
{
if (is_interactive)
break;
else
return false;
}
this_query_begin = this_query_end;
}
return true;
}
// Returns the last position we could parse.
const char * processWithFuzzing(const String & text)
{
/// Several queries separated by ';'.
/// INSERT data is ended by the end of line, not ';'.
const char * begin = text.data();
const char * end = begin + text.size();
while (begin < end)
{
// Skip whitespace before the query
while (isWhitespaceASCII(*begin) || *begin == ';')
{
++begin;
}
const auto * this_query_begin = begin;
ASTPtr orig_ast = parseQuery(begin, end, true);
if (!orig_ast)
{
// Can't continue after a parsing error
return begin;
}
auto * as_insert = orig_ast->as<ASTInsertQuery>();
if (as_insert && as_insert->data)
{
// INSERT data is ended by newline
as_insert->end = find_first_symbols<'\n'>(as_insert->data, end);
begin = as_insert->end;
}
full_query = text.substr(this_query_begin - text.data(),
begin - text.data());
// Don't repeat inserts, the tables grow too big. Also don't repeat
// creates because first we run the unmodified query, it will succeed,
// and the subsequent queries will fail. When we run out of fuzzer
// errors, it may be interesting to add fuzzing of create queries that
// wraps columns into LowCardinality or Nullable. Also there are other
// kinds of create queries such as CREATE DICTIONARY, we could fuzz
// them as well.
int this_query_runs = query_fuzzer_runs;
if (as_insert
|| orig_ast->as<ASTCreateQuery>())
{
this_query_runs = 1;
}
ASTPtr fuzz_base = orig_ast;
for (int fuzz_step = 0; fuzz_step < this_query_runs; fuzz_step++)
{
fprintf(stderr, "fuzzing step %d out of %d for query at pos %zd\n",
fuzz_step, this_query_runs, this_query_begin - text.data());
ASTPtr ast_to_process;
try
{
std::stringstream dump_before_fuzz;
fuzz_base->dumpTree(dump_before_fuzz);
auto base_before_fuzz = fuzz_base->formatForErrorMessage();
ast_to_process = fuzz_base->clone();
std::stringstream dump_of_cloned_ast;
ast_to_process->dumpTree(dump_of_cloned_ast);
// Run the original query as well.
if (fuzz_step > 0)
{
fuzzer.fuzzMain(ast_to_process);
}
auto base_after_fuzz = fuzz_base->formatForErrorMessage();
// Debug AST cloning errors.
if (base_before_fuzz != base_after_fuzz)
{
fprintf(stderr, "base before fuzz: %s\n"
"base after fuzz: %s\n", base_before_fuzz.c_str(),
base_after_fuzz.c_str());
fprintf(stderr, "dump before fuzz:\n%s\n",
dump_before_fuzz.str().c_str());
fprintf(stderr, "dump of cloned ast:\n%s\n",
dump_of_cloned_ast.str().c_str());
fprintf(stderr, "dump after fuzz:\n");
fuzz_base->dumpTree(std::cerr);
assert(false);
}
auto fuzzed_text = ast_to_process->formatForErrorMessage();
if (fuzz_step > 0 && fuzzed_text == base_before_fuzz)
{
fprintf(stderr, "got boring ast\n");
continue;
}
parsed_query = ast_to_process;
query_to_send = parsed_query->formatForErrorMessage();
processParsedSingleQuery();
}
catch (...)
{
last_exception_received_from_server = std::make_unique<Exception>(getCurrentExceptionMessage(true), getCurrentExceptionCode());
received_exception_from_server = true;
fmt::print(stderr, "Error on processing query '{}': {}\n",
ast_to_process->formatForErrorMessage(),
last_exception_received_from_server->message());
}
if (!connection->isConnected())
{
// Probably the server is dead because we found an assertion
// failure. Fail fast.
return begin;
}
if (received_exception_from_server)
{
// Query completed with error, ignore it and fuzz again.
fprintf(stderr, "Got error, will fuzz again\n");
received_exception_from_server = false;
last_exception_received_from_server.reset();
continue;
}
else if (ast_to_process->formatForErrorMessage().size() > 500)
{
// ast too long, start from original ast
fprintf(stderr, "current ast too long, won't elaborate\n");
fuzz_base = orig_ast;
}
else
{
// fuzz starting from this successful query
fprintf(stderr, "using this ast as etalon\n");
fuzz_base = ast_to_process;
}
}
}
return begin;
}
void processTextAsSingleQuery(const String & text_)
{
full_query = text_;
/// Some parts of a query (result output and formatting) are executed
/// client-side. Thus we need to parse the query.
const char * begin = full_query.data();
parsed_query = parseQuery(begin, begin + full_query.size(), false);
if (!parsed_query)
return;
// An INSERT query may have the data that follow query text. Remove the
/// Send part of query without data, because data will be sent separately.
auto * insert = parsed_query->as<ASTInsertQuery>();
if (insert && insert->data)
{
query_to_send = full_query.substr(0, insert->data - full_query.data());
}
else
{
query_to_send = full_query;
}
processParsedSingleQuery();
}
// Parameters are in global variables:
// 'parsed_query' -- the query AST,
// 'query_to_send' -- the query text that is sent to server,
// 'full_query' -- for INSERT queries, contains the query and the data that
// follow it. Its memory is referenced by ASTInsertQuery::begin, end.
void processParsedSingleQuery()
{
resetOutput();
last_exception_received_from_server.reset();
received_exception_from_server = false;
if (echo_queries)
{
writeString(full_query, std_out);
writeChar('\n', std_out);
std_out.next();
}
watch.restart();
processed_rows = 0;
progress.reset();
show_progress_bar = false;
written_progress_chars = 0;
written_first_block = false;
{
/// Temporarily apply query settings to context.
std::optional<Settings> old_settings;
SCOPE_EXIT({ if (old_settings) context.setSettings(*old_settings); });
auto apply_query_settings = [&](const IAST & settings_ast)
{
if (!old_settings)
old_settings.emplace(context.getSettingsRef());
context.applySettingsChanges(settings_ast.as<ASTSetQuery>()->changes);
};
const auto * insert = parsed_query->as<ASTInsertQuery>();
if (insert && insert->settings_ast)
apply_query_settings(*insert->settings_ast);
/// FIXME: try to prettify this cast using `as<>()`
const auto * with_output = dynamic_cast<const ASTQueryWithOutput *>(parsed_query.get());
if (with_output && with_output->settings_ast)
apply_query_settings(*with_output->settings_ast);
connection->forceConnected(connection_parameters.timeouts);
ASTPtr input_function;
if (insert && insert->select)
insert->tryFindInputFunction(input_function);
/// INSERT query for which data transfer is needed (not an INSERT SELECT or input()) is processed separately.
if (insert && (!insert->select || input_function) && !insert->watch)
{
if (input_function && insert->format.empty())
throw Exception("FORMAT must be specified for function input()", ErrorCodes::INVALID_USAGE_OF_INPUT);
processInsertQuery();
}
else
processOrdinaryQuery();
}
/// Do not change context (current DB, settings) in case of an exception.
if (!received_exception_from_server)
{
if (const auto * set_query = parsed_query->as<ASTSetQuery>())
{
/// Save all changes in settings to avoid losing them if the connection is lost.
for (const auto & change : set_query->changes)
{
if (change.name == "profile")
current_profile = change.value.safeGet<String>();
else
context.applySettingChange(change);
}
}
if (const auto * use_query = parsed_query->as<ASTUseQuery>())
{
const String & new_database = use_query->database;
/// If the client initiates the reconnection, it takes the settings from the config.
config().setString("database", new_database);
/// If the connection initiates the reconnection, it uses its variable.
connection->setDefaultDatabase(new_database);
}
}
if (is_interactive)
{
std::cout << std::endl
<< processed_rows << " rows in set. Elapsed: " << watch.elapsedSeconds() << " sec. ";
if (progress.read_rows >= 1000)
writeFinalProgress();
std::cout << std::endl << std::endl;
}
else if (print_time_to_stderr)
{
std::cerr << watch.elapsedSeconds() << "\n";
}
}
/// Convert external tables to ExternalTableData and send them using the connection.
void sendExternalTables()
{
const auto * select = parsed_query->as<ASTSelectWithUnionQuery>();
if (!select && !external_tables.empty())
throw Exception("External tables could be sent only with select query", ErrorCodes::BAD_ARGUMENTS);
std::vector<ExternalTableDataPtr> data;
for (auto & table : external_tables)
data.emplace_back(table.getData(context));
connection->sendExternalTablesData(data);
}
/// Process the query that doesn't require transferring data blocks to the server.
void processOrdinaryQuery()
{
/// Rewrite query only when we have query parameters.
/// Note that if query is rewritten, comments in query are lost.
/// But the user often wants to see comments in server logs, query log, processlist, etc.
if (!query_parameters.empty())
{
/// Replace ASTQueryParameter with ASTLiteral for prepared statements.
ReplaceQueryParameterVisitor visitor(query_parameters);
visitor.visit(parsed_query);
/// Get new query after substitutions. Note that it cannot be done for INSERT query with embedded data.
query_to_send = serializeAST(*parsed_query);
}
int retries_left = 10;
for (;;)
{
assert(retries_left > 0);
try
{
connection->sendQuery(
connection_parameters.timeouts,
query_to_send,
query_id,
QueryProcessingStage::Complete,
&context.getSettingsRef(),
&context.getClientInfo(),
true);
sendExternalTables();
receiveResult();
break;
}
catch (const Exception & e)
{
/// Retry when the server said "Client should retry" and no rows
/// has been received yet.
if (processed_rows == 0
&& e.code() == ErrorCodes::DEADLOCK_AVOIDED
&& --retries_left)
{
std::cerr << "Got a transient error from the server, will"
<< " retry (" << retries_left << " retries left)";
}
else
{
throw;
}
}
}
}
/// Process the query that requires transferring data blocks to the server.
void processInsertQuery()
{
const auto parsed_insert_query = parsed_query->as<ASTInsertQuery &>();
if (!parsed_insert_query.data && (is_interactive || (!stdin_is_a_tty && std_in.eof())))
throw Exception("No data to insert", ErrorCodes::NO_DATA_TO_INSERT);
connection->sendQuery(
connection_parameters.timeouts,
query_to_send,
query_id,
QueryProcessingStage::Complete,
&context.getSettingsRef(),
&context.getClientInfo(),
true);
sendExternalTables();
/// Receive description of table structure.
Block sample;
ColumnsDescription columns_description;
if (receiveSampleBlock(sample, columns_description))
{
/// If structure was received (thus, server has not thrown an exception),
/// send our data with that structure.
sendData(sample, columns_description);
receiveEndOfQuery();
}
}
ASTPtr parseQuery(const char * & pos, const char * end, bool allow_multi_statements)
{
ParserQuery parser(end, true);
ASTPtr res;
const auto & settings = context.getSettingsRef();
size_t max_length = 0;
if (!allow_multi_statements)
max_length = settings.max_query_size;
if (is_interactive || ignore_error)
{
String message;
res = tryParseQuery(parser, pos, end, message, true, "", allow_multi_statements, max_length, settings.max_parser_depth);
if (!res)
{
std::cerr << std::endl << message << std::endl << std::endl;
return nullptr;
}
}
else
res = parseQueryAndMovePosition(parser, pos, end, "", allow_multi_statements, max_length, settings.max_parser_depth);
if (is_interactive)
{
std::cout << std::endl;
formatAST(*res, std::cout);
std::cout << std::endl << std::endl;
}
return res;
}
void sendData(Block & sample, const ColumnsDescription & columns_description)
{
/// If INSERT data must be sent.
auto * parsed_insert_query = parsed_query->as<ASTInsertQuery>();
if (!parsed_insert_query)
return;
if (parsed_insert_query->data)
{
/// Send data contained in the query.
ReadBufferFromMemory data_in(parsed_insert_query->data, parsed_insert_query->end - parsed_insert_query->data);
sendDataFrom(data_in, sample, columns_description);
// Remember where the data ended. We use this info later to determine
// where the next query begins.
parsed_insert_query->end = data_in.buffer().begin() + data_in.count();
}
else if (!is_interactive)
{
/// Send data read from stdin.
sendDataFrom(std_in, sample, columns_description);
}
else
throw Exception("No data to insert", ErrorCodes::NO_DATA_TO_INSERT);
}
void sendDataFrom(ReadBuffer & buf, Block & sample, const ColumnsDescription & columns_description)
{
String current_format = insert_format;
/// Data format can be specified in the INSERT query.
if (const auto * insert = parsed_query->as<ASTInsertQuery>())
{
if (!insert->format.empty())
current_format = insert->format;
}
BlockInputStreamPtr block_input = context.getInputFormat(
current_format, buf, sample, insert_format_max_block_size);
const auto & column_defaults = columns_description.getDefaults();
if (!column_defaults.empty())
block_input = std::make_shared<AddingDefaultsBlockInputStream>(block_input, column_defaults, context);
BlockInputStreamPtr async_block_input = std::make_shared<AsynchronousBlockInputStream>(block_input);
async_block_input->readPrefix();
while (true)
{
Block block = async_block_input->read();
/// Check if server send Log packet
receiveLogs();
/// Check if server send Exception packet
auto packet_type = connection->checkPacket();
if (packet_type && *packet_type == Protocol::Server::Exception)
{
/*
* We're exiting with error, so it makes sense to kill the
* input stream without waiting for it to complete.
*/
async_block_input->cancel(true);
return;
}
connection->sendData(block);
processed_rows += block.rows();
if (!block)
break;
}
async_block_input->readSuffix();
}
/// Flush all buffers.
void resetOutput()
{
block_out_stream.reset();
logs_out_stream.reset();
if (pager_cmd)
{
pager_cmd->in.close();
pager_cmd->wait();
}
pager_cmd = nullptr;
if (out_file_buf)
{
out_file_buf->next();
out_file_buf.reset();
}
if (out_logs_buf)
{
out_logs_buf->next();
out_logs_buf.reset();
}
std_out.next();
}
/// Receives and processes packets coming from server.
/// Also checks if query execution should be cancelled.
void receiveResult()
{
InterruptListener interrupt_listener;
bool cancelled = false;
// TODO: get the poll_interval from commandline.
const auto receive_timeout = connection_parameters.timeouts.receive_timeout;
constexpr size_t default_poll_interval = 1000000; /// in microseconds
constexpr size_t min_poll_interval = 5000; /// in microseconds
const size_t poll_interval
= std::max(min_poll_interval, std::min<size_t>(receive_timeout.totalMicroseconds(), default_poll_interval));
while (true)
{
Stopwatch receive_watch(CLOCK_MONOTONIC_COARSE);
while (true)
{
/// Has the Ctrl+C been pressed and thus the query should be cancelled?
/// If this is the case, inform the server about it and receive the remaining packets
/// to avoid losing sync.
if (!cancelled)
{
auto cancel_query = [&]
{
connection->sendCancel();
cancelled = true;
if (is_interactive)
{
clearProgress();
std::cout << "Cancelling query." << std::endl;
}
/// Pressing Ctrl+C twice results in shut down.
interrupt_listener.unblock();
};
if (interrupt_listener.check())
{
cancel_query();
}
else
{
double elapsed = receive_watch.elapsedSeconds();
if (elapsed > receive_timeout.totalSeconds())
{
std::cout << "Timeout exceeded while receiving data from server."
<< " Waited for " << static_cast<size_t>(elapsed) << " seconds,"
<< " timeout is " << receive_timeout.totalSeconds() << " seconds." << std::endl;
cancel_query();
}
}
}
/// Poll for changes after a cancellation check, otherwise it never reached
/// because of progress updates from server.
if (connection->poll(poll_interval))
break;
}
if (!receiveAndProcessPacket(cancelled))
break;
}
if (cancelled && is_interactive)
std::cout << "Query was cancelled." << std::endl;
}
/// Receive a part of the result, or progress info or an exception and process it.
/// Returns true if one should continue receiving packets.
/// Output of result is suppressed if query was cancelled.
bool receiveAndProcessPacket(bool cancelled)
{
Packet packet = connection->receivePacket();
switch (packet.type)
{
case Protocol::Server::Data:
if (!cancelled)
onData(packet.block);
return true;
case Protocol::Server::Progress:
onProgress(packet.progress);
return true;
case Protocol::Server::ProfileInfo:
onProfileInfo(packet.profile_info);
return true;
case Protocol::Server::Totals:
if (!cancelled)
onTotals(packet.block);
return true;
case Protocol::Server::Extremes:
if (!cancelled)
onExtremes(packet.block);
return true;
case Protocol::Server::Exception:
onReceiveExceptionFromServer(*packet.exception);
last_exception_received_from_server = std::move(packet.exception);
return false;
case Protocol::Server::Log:
onLogData(packet.block);
return true;
case Protocol::Server::EndOfStream:
onEndOfStream();
return false;
default:
throw Exception(ErrorCodes::UNKNOWN_PACKET_FROM_SERVER, "Unknown packet {} from server {}",
packet.type, connection->getDescription());
}
}
/// Receive the block that serves as an example of the structure of table where data will be inserted.
bool receiveSampleBlock(Block & out, ColumnsDescription & columns_description)
{
while (true)
{
Packet packet = connection->receivePacket();
switch (packet.type)
{
case Protocol::Server::Data:
out = packet.block;
return true;
case Protocol::Server::Exception:
onReceiveExceptionFromServer(*packet.exception);
last_exception_received_from_server = std::move(packet.exception);
return false;
case Protocol::Server::Log:
onLogData(packet.block);
break;
case Protocol::Server::TableColumns:
columns_description = ColumnsDescription::parse(packet.multistring_message[1]);
return receiveSampleBlock(out, columns_description);
default:
throw NetException("Unexpected packet from server (expected Data, Exception or Log, got "
+ String(Protocol::Server::toString(packet.type)) + ")", ErrorCodes::UNEXPECTED_PACKET_FROM_SERVER);
}
}
}
/// Process Log packets, exit when receive Exception or EndOfStream
bool receiveEndOfQuery()
{
while (true)
{
Packet packet = connection->receivePacket();
switch (packet.type)
{
case Protocol::Server::EndOfStream:
onEndOfStream();
return true;
case Protocol::Server::Exception:
onReceiveExceptionFromServer(*packet.exception);
last_exception_received_from_server = std::move(packet.exception);
return false;
case Protocol::Server::Log:
onLogData(packet.block);
break;
default:
throw NetException("Unexpected packet from server (expected Exception, EndOfStream or Log, got "
+ String(Protocol::Server::toString(packet.type)) + ")", ErrorCodes::UNEXPECTED_PACKET_FROM_SERVER);
}
}
}
/// Process Log packets, used when inserting data by blocks
void receiveLogs()
{
auto packet_type = connection->checkPacket();
while (packet_type && *packet_type == Protocol::Server::Log)
{
receiveAndProcessPacket(false);
packet_type = connection->checkPacket();
}
}
void initBlockOutputStream(const Block & block)
{
if (!block_out_stream)
{
WriteBuffer * out_buf = nullptr;
String pager = config().getString("pager", "");
if (!pager.empty())
{
signal(SIGPIPE, SIG_IGN);
pager_cmd = ShellCommand::execute(pager, true);
out_buf = &pager_cmd->in;
}
else
{
out_buf = &std_out;
}
String current_format = format;
/// The query can specify output format or output file.
/// FIXME: try to prettify this cast using `as<>()`
if (const auto * query_with_output = dynamic_cast<const ASTQueryWithOutput *>(parsed_query.get()))
{
if (query_with_output->out_file)
{
const auto & out_file_node = query_with_output->out_file->as<ASTLiteral &>();
const auto & out_file = out_file_node.value.safeGet<std::string>();
out_file_buf.emplace(out_file, DBMS_DEFAULT_BUFFER_SIZE, O_WRONLY | O_EXCL | O_CREAT);
out_buf = &*out_file_buf;
// We are writing to file, so default format is the same as in non-interactive mode.
if (is_interactive && is_default_format)
current_format = "TabSeparated";
}
if (query_with_output->format != nullptr)
{
if (has_vertical_output_suffix)
throw Exception("Output format already specified", ErrorCodes::CLIENT_OUTPUT_FORMAT_SPECIFIED);
const auto & id = query_with_output->format->as<ASTIdentifier &>();
current_format = id.name;
}
}
if (has_vertical_output_suffix)
current_format = "Vertical";
block_out_stream = context.getOutputFormat(current_format, *out_buf, block);
block_out_stream->writePrefix();
}
}
void initLogsOutputStream()
{
if (!logs_out_stream)
{
WriteBuffer * wb = out_logs_buf.get();
if (!out_logs_buf)
{
if (server_logs_file.empty())
{
/// Use stderr by default
out_logs_buf = std::make_unique<WriteBufferFromFileDescriptor>(STDERR_FILENO);
wb = out_logs_buf.get();
}
else if (server_logs_file == "-")
{
/// Use stdout if --server_logs_file=- specified
wb = &std_out;
}
else
{
out_logs_buf = std::make_unique<WriteBufferFromFile>(
server_logs_file, DBMS_DEFAULT_BUFFER_SIZE, O_WRONLY | O_APPEND | O_CREAT);
wb = out_logs_buf.get();
}
}
logs_out_stream = std::make_shared<InternalTextLogsRowOutputStream>(*wb, stdout_is_a_tty);
logs_out_stream->writePrefix();
}
}
void onData(Block & block)
{
if (!block)
return;
processed_rows += block.rows();
initBlockOutputStream(block);
/// The header block containing zero rows was used to initialize
/// block_out_stream, do not output it.
/// Also do not output too much data if we're fuzzing.
if (block.rows() != 0
&& (query_fuzzer_runs == 0 || processed_rows < 100))
{
block_out_stream->write(block);
written_first_block = true;
}
bool clear_progess = std_out.offset() > 0;
if (clear_progess)
clearProgress();
/// Received data block is immediately displayed to the user.
block_out_stream->flush();
/// Restore progress bar after data block.
if (clear_progess)
writeProgress();
}
void onLogData(Block & block)
{
initLogsOutputStream();
clearProgress();
logs_out_stream->write(block);
logs_out_stream->flush();
}
void onTotals(Block & block)
{
initBlockOutputStream(block);
block_out_stream->setTotals(block);
}
void onExtremes(Block & block)
{
initBlockOutputStream(block);
block_out_stream->setExtremes(block);
}
void onProgress(const Progress & value)
{
if (!progress.incrementPiecewiseAtomically(value))
{
// Just a keep-alive update.
return;
}
if (block_out_stream)
block_out_stream->onProgress(value);
writeProgress();
}
void clearProgress()
{
if (written_progress_chars)
{
written_progress_chars = 0;
std::cerr << "\r" CLEAR_TO_END_OF_LINE;
}
}
void writeProgress()
{
if (!need_render_progress)
return;
/// Output all progress bar commands to stderr at once to avoid flicker.
WriteBufferFromFileDescriptor message(STDERR_FILENO, 1024);
static size_t increment = 0;
static const char * indicators[8] =
{
"\033[1;30m→\033[0m",
"\033[1;31m↘\033[0m",
"\033[1;32m↓\033[0m",
"\033[1;33m↙\033[0m",
"\033[1;34m←\033[0m",
"\033[1;35m↖\033[0m",
"\033[1;36m↑\033[0m",
"\033[1m↗\033[0m",
};
const char * indicator = indicators[increment % 8];
size_t terminal_width = getTerminalWidth();
if (!written_progress_chars)
{
/// If the current line is not empty, the progress must be output on the next line.
/// The trick is found here: https://www.vidarholen.net/contents/blog/?p=878
message << std::string(terminal_width, ' ');
}
message << '\r';
size_t prefix_size = message.count();
message << indicator << " Progress: ";
message
<< formatReadableQuantity(progress.read_rows) << " rows, "
<< formatReadableSizeWithDecimalSuffix(progress.read_bytes);
size_t elapsed_ns = watch.elapsed();
if (elapsed_ns)
message << " ("
<< formatReadableQuantity(progress.read_rows * 1000000000.0 / elapsed_ns) << " rows/s., "
<< formatReadableSizeWithDecimalSuffix(progress.read_bytes * 1000000000.0 / elapsed_ns) << "/s.) ";
else
message << ". ";
written_progress_chars = message.count() - prefix_size - (strlen(indicator) - 2); /// Don't count invisible output (escape sequences).
/// If the approximate number of rows to process is known, we can display a progress bar and percentage.
if (progress.total_rows_to_read > 0)
{
size_t total_rows_corrected = std::max(progress.read_rows, progress.total_rows_to_read);
/// To avoid flicker, display progress bar only if .5 seconds have passed since query execution start
/// and the query is less than halfway done.
if (elapsed_ns > 500000000)
{
/// Trigger to start displaying progress bar. If query is mostly done, don't display it.
if (progress.read_rows * 2 < total_rows_corrected)
show_progress_bar = true;
if (show_progress_bar)
{
ssize_t width_of_progress_bar = static_cast<ssize_t>(terminal_width) - written_progress_chars - strlen(" 99%");
if (width_of_progress_bar > 0)
{
std::string bar = UnicodeBar::render(UnicodeBar::getWidth(progress.read_rows, 0, total_rows_corrected, width_of_progress_bar));
message << "\033[0;32m" << bar << "\033[0m";
if (width_of_progress_bar > static_cast<ssize_t>(bar.size() / UNICODE_BAR_CHAR_SIZE))
message << std::string(width_of_progress_bar - bar.size() / UNICODE_BAR_CHAR_SIZE, ' ');
}
}
}
/// Underestimate percentage a bit to avoid displaying 100%.
message << ' ' << (99 * progress.read_rows / total_rows_corrected) << '%';
}
message << CLEAR_TO_END_OF_LINE;
++increment;
message.next();
}
void writeFinalProgress()
{
std::cout << "Processed "
<< formatReadableQuantity(progress.read_rows) << " rows, "
<< formatReadableSizeWithDecimalSuffix(progress.read_bytes);
size_t elapsed_ns = watch.elapsed();
if (elapsed_ns)
std::cout << " ("
<< formatReadableQuantity(progress.read_rows * 1000000000.0 / elapsed_ns) << " rows/s., "
<< formatReadableSizeWithDecimalSuffix(progress.read_bytes * 1000000000.0 / elapsed_ns) << "/s.) ";
else
std::cout << ". ";
}
void onReceiveExceptionFromServer(const Exception & e)
{
resetOutput();
received_exception_from_server = true;
actual_server_error = e.code();
if (expected_server_error)
{
if (actual_server_error == expected_server_error)
return;
std::cerr << "Expected error code: " << expected_server_error << " but got: " << actual_server_error << "." << std::endl;
}
std::string text = e.displayText();
auto embedded_stack_trace_pos = text.find("Stack trace");
if (std::string::npos != embedded_stack_trace_pos && !config().getBool("stacktrace", false))
text.resize(embedded_stack_trace_pos);
/// If we probably have progress bar, we should add additional newline,
/// otherwise exception may display concatenated with the progress bar.
if (need_render_progress)
std::cerr << '\n';
std::cerr << "Received exception from server (version " << server_version << "):" << std::endl
<< "Code: " << e.code() << ". " << text << std::endl;
}
void onProfileInfo(const BlockStreamProfileInfo & profile_info)
{
if (profile_info.hasAppliedLimit() && block_out_stream)
block_out_stream->setRowsBeforeLimit(profile_info.getRowsBeforeLimit());
}
void onEndOfStream()
{
clearProgress();
if (block_out_stream)
block_out_stream->writeSuffix();
if (logs_out_stream)
logs_out_stream->writeSuffix();
resetOutput();
if (is_interactive && !written_first_block)
{
clearProgress();
std::cout << "Ok." << std::endl;
}
}
static void showClientVersion()
{
std::cout << DBMS_NAME << " client version " << VERSION_STRING << VERSION_OFFICIAL << "." << std::endl;
}
public:
void init(int argc, char ** argv)
{
/// Don't parse options with Poco library. We need more sophisticated processing.
stopOptionsProcessing();
/** We allow different groups of arguments:
* - common arguments;
* - arguments for any number of external tables each in form "--external args...",
* where possible args are file, name, format, structure, types;
* - param arguments for prepared statements.
* Split these groups before processing.
*/
using Arguments = std::vector<std::string>;
Arguments common_arguments{""}; /// 0th argument is ignored.
std::vector<Arguments> external_tables_arguments;
bool in_external_group = false;
for (int arg_num = 1; arg_num < argc; ++arg_num)
{
const char * arg = argv[arg_num];
if (0 == strcmp(arg, "--external"))
{
in_external_group = true;
external_tables_arguments.emplace_back(Arguments{""});
}
/// Options with value after equal sign.
else if (in_external_group
&& (0 == strncmp(arg, "--file=", strlen("--file="))
|| 0 == strncmp(arg, "--name=", strlen("--name="))
|| 0 == strncmp(arg, "--format=", strlen("--format="))
|| 0 == strncmp(arg, "--structure=", strlen("--structure="))
|| 0 == strncmp(arg, "--types=", strlen("--types="))))
{
external_tables_arguments.back().emplace_back(arg);
}
/// Options with value after whitespace.
else if (in_external_group
&& (0 == strcmp(arg, "--file")
|| 0 == strcmp(arg, "--name")
|| 0 == strcmp(arg, "--format")
|| 0 == strcmp(arg, "--structure")
|| 0 == strcmp(arg, "--types")))
{
if (arg_num + 1 < argc)
{
external_tables_arguments.back().emplace_back(arg);
++arg_num;
arg = argv[arg_num];
external_tables_arguments.back().emplace_back(arg);
}
else
break;
}
else
{
in_external_group = false;
/// Parameter arg after underline.
if (startsWith(arg, "--param_"))
{
const char * param_continuation = arg + strlen("--param_");
const char * equal_pos = strchr(param_continuation, '=');
if (equal_pos == param_continuation)
throw Exception("Parameter name cannot be empty", ErrorCodes::BAD_ARGUMENTS);
if (equal_pos)
{
/// param_name=value
query_parameters.emplace(String(param_continuation, equal_pos), String(equal_pos + 1));
}
else
{
/// param_name value
++arg_num;
arg = argv[arg_num];
query_parameters.emplace(String(param_continuation), String(arg));
}
}
else
common_arguments.emplace_back(arg);
}
}
stdin_is_a_tty = isatty(STDIN_FILENO);
stdout_is_a_tty = isatty(STDOUT_FILENO);
uint64_t terminal_width = 0;
if (stdin_is_a_tty)
terminal_width = getTerminalWidth();
namespace po = boost::program_options;
/// Main commandline options related to client functionality and all parameters from Settings.
po::options_description main_description = createOptionsDescription("Main options", terminal_width);
main_description.add_options()
("help", "produce help message")
("config-file,C", po::value<std::string>(), "config-file path")
("config,c", po::value<std::string>(), "config-file path (another shorthand)")
("host,h", po::value<std::string>()->default_value("localhost"), "server host")
("port", po::value<int>()->default_value(9000), "server port")
("secure,s", "Use TLS connection")
("user,u", po::value<std::string>()->default_value("default"), "user")
/** If "--password [value]" is used but the value is omitted, the bad argument exception will be thrown.
* implicit_value is used to avoid this exception (to allow user to type just "--password")
* Since currently boost provides no way to check if a value has been set implicitly for an option,
* the "\n" is used to distinguish this case because there is hardly a chance an user would use "\n"
* as the password.
*/
("password", po::value<std::string>()->implicit_value("\n", ""), "password")
("ask-password", "ask-password")
("quota_key", po::value<std::string>(), "A string to differentiate quotas when the user have keyed quotas configured on server")
("query_id", po::value<std::string>(), "query_id")
("query,q", po::value<std::string>(), "query")
("database,d", po::value<std::string>(), "database")
("pager", po::value<std::string>(), "pager")
("disable_suggestion,A", "Disable loading suggestion data. Note that suggestion data is loaded asynchronously through a second connection to ClickHouse server. Also it is reasonable to disable suggestion if you want to paste a query with TAB characters. Shorthand option -A is for those who get used to mysql client.")
("suggestion_limit", po::value<int>()->default_value(10000),
"Suggestion limit for how many databases, tables and columns to fetch.")
("multiline,m", "multiline")
("multiquery,n", "multiquery")
("format,f", po::value<std::string>(), "default output format")
("testmode,T", "enable test hints in comments")
("ignore-error", "do not stop processing in multiquery mode")
("vertical,E", "vertical output format, same as --format=Vertical or FORMAT Vertical or \\G at end of command")
("time,t", "print query execution time to stderr in non-interactive mode (for benchmarks)")
("stacktrace", "print stack traces of exceptions")
("progress", "print progress even in non-interactive mode")
("version,V", "print version information and exit")
("version-clean", "print version in machine-readable format and exit")
("echo", "in batch mode, print query before execution")
("max_client_network_bandwidth", po::value<int>(), "the maximum speed of data exchange over the network for the client in bytes per second.")
("compression", po::value<bool>(), "enable or disable compression")
("highlight", po::value<bool>()->default_value(true), "enable or disable basic syntax highlight in interactive command line")
("log-level", po::value<std::string>(), "client log level")
("server_logs_file", po::value<std::string>(), "put server logs into specified file")
("query-fuzzer-runs", po::value<int>()->default_value(0), "query fuzzer runs")
;
Settings cmd_settings;
cmd_settings.addProgramOptions(main_description);
/// Commandline options related to external tables.
po::options_description external_description = createOptionsDescription("External tables options", terminal_width);
external_description.add_options()
("file", po::value<std::string>(), "data file or - for stdin")
("name", po::value<std::string>()->default_value("_data"), "name of the table")
("format", po::value<std::string>()->default_value("TabSeparated"), "data format")
("structure", po::value<std::string>(), "structure")
("types", po::value<std::string>(), "types")
;
/// Parse main commandline options.
po::parsed_options parsed = po::command_line_parser(common_arguments).options(main_description).run();
auto unrecognized_options = po::collect_unrecognized(parsed.options, po::collect_unrecognized_mode::include_positional);
// unrecognized_options[0] is "", I don't understand why we need "" as the first argument which unused
if (unrecognized_options.size() > 1)
{
throw Exception("Unrecognized option '" + unrecognized_options[1] + "'", ErrorCodes::UNRECOGNIZED_ARGUMENTS);
}
po::variables_map options;
po::store(parsed, options);
po::notify(options);
if (options.count("version") || options.count("V"))
{
showClientVersion();
exit(0);
}
if (options.count("version-clean"))
{
std::cout << VERSION_STRING;
exit(0);
}
/// Output of help message.
if (options.count("help")
|| (options.count("host") && options["host"].as<std::string>() == "elp")) /// If user writes -help instead of --help.
{
std::cout << main_description << "\n";
std::cout << external_description << "\n";
std::cout << "In addition, --param_name=value can be specified for substitution of parameters for parametrized queries.\n";
exit(0);
}
if (options.count("log-level"))
Poco::Logger::root().setLevel(options["log-level"].as<std::string>());
size_t number_of_external_tables_with_stdin_source = 0;
for (size_t i = 0; i < external_tables_arguments.size(); ++i)
{
/// Parse commandline options related to external tables.
po::parsed_options parsed_tables = po::command_line_parser(external_tables_arguments[i]).options(external_description).run();
po::variables_map external_options;
po::store(parsed_tables, external_options);
try
{
external_tables.emplace_back(external_options);
if (external_tables.back().file == "-")
++number_of_external_tables_with_stdin_source;
if (number_of_external_tables_with_stdin_source > 1)
throw Exception("Two or more external tables has stdin (-) set as --file field", ErrorCodes::BAD_ARGUMENTS);
}
catch (const Exception & e)
{
std::string text = e.displayText();
std::cerr << "Code: " << e.code() << ". " << text << std::endl;
std::cerr << "Table №" << i << std::endl << std::endl;
/// Avoid the case when error exit code can possibly overflow to normal (zero).
auto exit_code = e.code() % 256;
if (exit_code == 0)
exit_code = 255;
exit(exit_code);
}
}
context.makeGlobalContext();
context.setSettings(cmd_settings);
/// Copy settings-related program options to config.
/// TODO: Is this code necessary?
for (const auto & setting : context.getSettingsRef().all())
{
const auto & name = setting.getName();
if (options.count(name))
config().setString(name, options[name].as<std::string>());
}
if (options.count("config-file") && options.count("config"))
throw Exception("Two or more configuration files referenced in arguments", ErrorCodes::BAD_ARGUMENTS);
/// Save received data into the internal config.
if (options.count("config-file"))
config().setString("config-file", options["config-file"].as<std::string>());
if (options.count("config"))
config().setString("config-file", options["config"].as<std::string>());
if (options.count("host") && !options["host"].defaulted())
config().setString("host", options["host"].as<std::string>());
if (options.count("query_id"))
config().setString("query_id", options["query_id"].as<std::string>());
if (options.count("query"))
config().setString("query", options["query"].as<std::string>());
if (options.count("database"))
config().setString("database", options["database"].as<std::string>());
if (options.count("pager"))
config().setString("pager", options["pager"].as<std::string>());
if (options.count("port") && !options["port"].defaulted())
config().setInt("port", options["port"].as<int>());
if (options.count("secure"))
config().setBool("secure", true);
if (options.count("user") && !options["user"].defaulted())
config().setString("user", options["user"].as<std::string>());
if (options.count("password"))
config().setString("password", options["password"].as<std::string>());
if (options.count("ask-password"))
config().setBool("ask-password", true);
if (options.count("quota_key"))
config().setString("quota_key", options["quota_key"].as<std::string>());
if (options.count("multiline"))
config().setBool("multiline", true);
if (options.count("multiquery"))
config().setBool("multiquery", true);
if (options.count("testmode"))
config().setBool("testmode", true);
if (options.count("ignore-error"))
config().setBool("ignore-error", true);
if (options.count("format"))
config().setString("format", options["format"].as<std::string>());
if (options.count("vertical"))
config().setBool("vertical", true);
if (options.count("stacktrace"))
config().setBool("stacktrace", true);
if (options.count("progress"))
config().setBool("progress", true);
if (options.count("echo"))
config().setBool("echo", true);
if (options.count("time"))
print_time_to_stderr = true;
if (options.count("max_client_network_bandwidth"))
max_client_network_bandwidth = options["max_client_network_bandwidth"].as<int>();
if (options.count("compression"))
config().setBool("compression", options["compression"].as<bool>());
if (options.count("server_logs_file"))
server_logs_file = options["server_logs_file"].as<std::string>();
if (options.count("disable_suggestion"))
config().setBool("disable_suggestion", true);
if (options.count("suggestion_limit"))
config().setInt("suggestion_limit", options["suggestion_limit"].as<int>());
if (options.count("highlight"))
config().setBool("highlight", options["highlight"].as<bool>());
if ((query_fuzzer_runs = options["query-fuzzer-runs"].as<int>()))
{
// Fuzzer implies multiquery.
config().setBool("multiquery", true);
// Ignore errors in parsing queries.
// TODO stop using parseQuery.
config().setBool("ignore-error", true);
ignore_error = true;
}
argsToConfig(common_arguments, config(), 100);
clearPasswordFromCommandLine(argc, argv);
}
};
}
#pragma GCC diagnostic ignored "-Wunused-function"
#pragma GCC diagnostic ignored "-Wmissing-declarations"
int mainEntryClickHouseClient(int argc, char ** argv)
{
try
{
DB::Client client;
client.init(argc, argv);
return client.run();
}
catch (const boost::program_options::error & e)
{
std::cerr << "Bad arguments: " << e.what() << std::endl;
return 1;
}
catch (const DB::Exception & e)
{
std::string text = e.displayText();
std::cerr << "Code: " << e.code() << ". " << text << std::endl;
return 1;
}
catch (...)
{
std::cerr << DB::getCurrentExceptionMessage(true) << std::endl;
return 1;
}
}
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