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ClickHouse/dbms/programs/client/Client.cpp

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#include <port/unistd.h>
#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 <boost/program_options.hpp>
#include <boost/algorithm/string/replace.hpp>
#include <Poco/File.h>
#include <Poco/Util/Application.h>
#include <common/readline_use.h>
#include <common/find_first_symbols.h>
#include <common/SetTerminalEcho.h>
#include <Common/ClickHouseRevision.h>
#include <Common/Stopwatch.h>
#include <Common/Exception.h>
#include <Common/ShellCommand.h>
#include <Common/ExternalTable.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/Config/ConfigProcessor.h>
#include <Core/Types.h>
#include <Core/QueryProcessingStage.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 <DataStreams/AsynchronousBlockInputStream.h>
#include <Parsers/ParserQuery.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 <Interpreters/Context.h>
#include <Client/Connection.h>
#include <Client/Completion.h>
#include <Client/QueryParts.h>
#include <Common/InterruptListener.h>
#include <Functions/registerFunctions.h>
#include <AggregateFunctions/registerAggregateFunctions.h>
#include <ext/scope_guard.h>
static Completion::TSTNode completionNode;
char ** query_parts_completion(const char *, int, int);
char * query_parts_generator(const char *, int);
/// http://en.wikipedia.org/wiki/ANSI_escape_code
/// Similar codes \e[s, \e[u don't work in VT100 and Mosh.
#define SAVE_CURSOR_POSITION "\e7"
#define RESTORE_CURSOR_POSITION "\e8"
#define CLEAR_TO_END_OF_LINE "\033[K"
/// This codes are possibly not supported everywhere.
#define DISABLE_LINE_WRAPPING "\033[?7l"
#define ENABLE_LINE_WRAPPING "\033[?7h"
namespace DB
{
namespace ErrorCodes
{
extern const int POCO_EXCEPTION;
extern const int STD_EXCEPTION;
extern const int UNKNOWN_EXCEPTION;
extern const int NETWORK_ERROR;
extern const int NO_DATA_TO_INSERT;
extern const int BAD_ARGUMENTS;
extern const int CANNOT_READ_HISTORY;
extern const int CANNOT_APPEND_HISTORY;
extern const int UNKNOWN_PACKET_FROM_SERVER;
extern const int UNEXPECTED_PACKET_FROM_SERVER;
extern const int CLIENT_OUTPUT_FORMAT_SPECIFIED;
}
class Client : public Poco::Util::Application
{
public:
Client() {}
void init_suggestions(Completion::TSTNode &node)
{
QUERYPART *qP = queryParts;
while (qP->name) {
node.add_word(qP->name);
qP++;
}
std::vector<Block> blocks;
//preload all functions
sendQuery("SELECT name FROM system.functions", blocks);
for (const auto &block : blocks) {
size_t size = block.rows();
for (size_t i = size; i--;) {
node.add_word(strdup(block.getByName("name").column->getDataAt(i).toString().c_str()));
}
}
blocks.clear();
int limit = config().getInt("suggestion_limit", suggestion_limit);
//preload limited amount of dbs
auto *query = new char[128];
sprintf(query, "SELECT name FROM system.databases ORDER BY name LIMIT %d", limit);
sendQuery(query, blocks);
for (const auto &block : blocks) {
size_t size = block.rows();
for (size_t i = size; i--;) {
node.add_word(strdup(block.getByName("name").column->getDataAt(i).toString().c_str()));
}
}
blocks.clear();
delete query;
//preload limited amount of tables and their columns
query = new char[128];
sprintf(
query,
"SELECT table,name FROM system.columns WHERE table IN (SELECT name FROM system.tables ORDER BY name"
" LIMIT %d)",
limit
);
sendQuery(query, blocks);
for (const auto &block : blocks) {
ColumnWithTypeAndName tableNameColumn = block.getByName("table");
ColumnWithTypeAndName columnNameColumn = block.getByName("name");
size_t size = block.rows();
for (size_t i = size; i--;) {
const char *tableName = strdup(tableNameColumn.column->getDataAt(i).toString().c_str());
const char *columnName = strdup(columnNameColumn.column->getDataAt(i).toString().c_str());
auto *implodedName = new char[strlen(tableName)+strlen(columnName)+2];
sprintf(implodedName, "%s.%s", tableName, columnName);
if (!node.has(tableName)) {
node.add_word(tableName);
}
if (!node.has(columnName)) {
node.add_word(columnName);
}
if (!node.has(implodedName)) {
node.add_word(implodedName);
}
delete implodedName;
}
}
delete query;
}
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 readline 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 print_time_to_stderr = false; /// Output execution time to stderr in batch mode.
bool stdin_is_not_tty = false; /// stdin is not a terminal.
winsize terminal_size {}; /// Terminal size is needed to render progress bar.
std::unique_ptr<Connection> connection; /// Connection to DB.
String query_id; /// Current query_id.
String query; /// Current query.
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?
Context context = Context::createGlobal();
/// 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;
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;
/// If the last query resulted in exception.
bool got_exception = false;
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;
/// Suggestion limit for how many databases and tables to fetch
int suggestion_limit = 100;
struct ConnectionParameters
{
String host;
UInt16 port;
String default_database;
String user;
String password;
Protocol::Secure security;
Protocol::Compression compression;
ConnectionTimeouts timeouts;
ConnectionParameters() {}
ConnectionParameters(const Poco::Util::AbstractConfiguration & config)
{
bool is_secure = config.getBool("secure", false);
security = is_secure
? Protocol::Secure::Enable
: Protocol::Secure::Disable;
host = config.getString("host", "localhost");
port = config.getInt("port",
config.getInt(is_secure ? "tcp_port_secure" : "tcp_port",
is_secure ? DBMS_DEFAULT_SECURE_PORT : DBMS_DEFAULT_PORT));
default_database = config.getString("database", "");
user = config.getString("user", "");
if (config.getBool("ask-password", false))
{
if (config.has("password"))
throw Exception("Specified both --password and --ask-password. Remove one of them", ErrorCodes::BAD_ARGUMENTS);
std::cout << "Password for user " << user << ": ";
SetTerminalEcho(false);
SCOPE_EXIT({
SetTerminalEcho(true);
});
std::getline(std::cin, password);
std::cout << std::endl;
}
else
{
password = config.getString("password", "");
}
compression = config.getBool("compression", true)
? Protocol::Compression::Enable
: Protocol::Compression::Disable;
timeouts = ConnectionTimeouts(
Poco::Timespan(config.getInt("connect_timeout", DBMS_DEFAULT_CONNECT_TIMEOUT_SEC), 0),
Poco::Timespan(config.getInt("receive_timeout", DBMS_DEFAULT_RECEIVE_TIMEOUT_SEC), 0),
Poco::Timespan(config.getInt("send_timeout", DBMS_DEFAULT_SEND_TIMEOUT_SEC), 0));
}
};
ConnectionParameters connection_parameters;
void initialize(Poco::Util::Application & self)
{
Poco::Util::Application::initialize(self);
const char * home_path_cstr = getenv("HOME");
if (home_path_cstr)
home_path = home_path_cstr;
std::string config_path;
if (config().has("config-file"))
config_path = config().getString("config-file");
else if (Poco::File("./clickhouse-client.xml").exists())
config_path = "./clickhouse-client.xml";
else if (!home_path.empty() && Poco::File(home_path + "/.clickhouse-client/config.xml").exists())
config_path = home_path + "/.clickhouse-client/config.xml";
else if (Poco::File("/etc/clickhouse-client/config.xml").exists())
config_path = "/etc/clickhouse-client/config.xml";
if (!config_path.empty())
{
ConfigProcessor config_processor(config_path);
auto loaded_config = config_processor.loadConfig();
config().add(loaded_config.configuration);
}
context.setApplicationType(Context::ApplicationType::CLIENT);
/// settings and limits could be specified in config file, but passed settings has higher priority
#define EXTRACT_SETTING(TYPE, NAME, DEFAULT, DESCRIPTION) \
if (config().has(#NAME) && !context.getSettingsRef().NAME.changed) \
context.setSetting(#NAME, config().getString(#NAME));
APPLY_FOR_SETTINGS(EXTRACT_SETTING)
#undef EXTRACT_SETTING
}
int main(const std::vector<std::string> & /*args*/)
{
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.getStackTrace().toString();
}
/// If exception code isn't zero, we should return non-zero return code anyway.
return e.code() ? e.code() : -1;
}
catch (const Poco::Exception & e)
{
std::cerr << "Poco::Exception: " << e.displayText() << std::endl;
return ErrorCodes::POCO_EXCEPTION;
}
catch (const std::exception & e)
{
std::cerr << "std::exception: " << e.what() << std::endl;
return ErrorCodes::STD_EXCEPTION;
}
catch (...)
{
std::cerr << "Unknown exception" << std::endl;
return ErrorCodes::UNKNOWN_EXCEPTION;
}
}
/// Should we celebrate a bit?
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);
}
int mainImpl()
{
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.
stdin_is_not_tty = !isatty(STDIN_FILENO);
if (stdin_is_not_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";
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);
}
connection_parameters = ConnectionParameters(config());
connect();
/// Initialize DateLUT here to avoid counting time spent here as query execution time.
DateLUT::instance();
if (!context.getSettingsRef().use_client_time_zone)
{
const auto & time_zone = connection->getServerTimezone();
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 USE_READLINE
rl_attempted_completion_function = query_parts_completion;
std::thread tS([=] {init_suggestions(completionNode);});
#else
/// Turn tab completion off.
rl_bind_key('\t', rl_insert);
#endif
/// Load command history if present.
if (config().has("history_file"))
history_file = config().getString("history_file");
else if (!home_path.empty())
history_file = home_path + "/.clickhouse-client-history";
if (!history_file.empty())
{
if (Poco::File(history_file).exists())
{
#if USE_READLINE
int res = read_history(history_file.c_str());
if (res)
throwFromErrno("Cannot read history from file " + history_file, ErrorCodes::CANNOT_READ_HISTORY);
#endif
}
else /// Create history file.
Poco::File(history_file).createFile();
}
loop();
#if USE_READLINE
completionNode.free();
#endif
std::cout << (isNewYearMode() ? "Happy new year." : "Bye.") << std::endl;
return 0;
}
else
{
query_id = config().getString("query_id", "");
nonInteractive();
/// If exception code isn't zero, we should return non-zero return code anyway.
if (last_exception)
return last_exception->code() != 0 ? last_exception->code() : -1;
return 0;
}
}
void connect()
{
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,
connection_parameters.timeouts,
"client",
connection_parameters.compression,
connection_parameters.security);
String server_name;
UInt64 server_version_major = 0;
UInt64 server_version_minor = 0;
UInt64 server_revision = 0;
if (max_client_network_bandwidth)
{
ThrottlerPtr throttler = std::make_shared<Throttler>(max_client_network_bandwidth, 0, "");
connection->setThrottler(throttler);
}
connection->getServerVersion(server_name, server_version_major, server_version_minor, server_revision);
server_version = toString(server_version_major) + "." + toString(server_version_minor) + "." + toString(server_revision);
if (server_display_name = connection->getServerDisplayName(); server_display_name.length() == 0)
{
server_display_name = config().getString("host", "localhost");
}
if (is_interactive)
{
std::cout << "Connected to " << server_name
<< " server version " << server_version
<< "." << std::endl << std::endl;
}
}
/// Check if multi-line query is inserted from the paste buffer.
/// Allows delaying the start of query execution until the entirety of query is inserted.
static bool hasDataInSTDIN()
{
timeval timeout = { 0, 0 };
fd_set fds;
FD_ZERO(&fds);
FD_SET(STDIN_FILENO, &fds);
return select(1, &fds, 0, 0, &timeout) == 1;
}
inline const String prompt() const
{
return boost::replace_all_copy(prompt_by_server_display_name, "{database}", config().getString("database", "default"));
}
void loop()
{
String query;
String prev_query;
while (char * line_ = readline(query.empty() ? prompt().c_str() : ":-] "))
{
String line = line_;
free(line_);
size_t ws = line.size();
while (ws > 0 && isWhitespaceASCII(line[ws - 1]))
--ws;
if (ws == 0 || line.empty())
continue;
bool ends_with_semicolon = line[ws - 1] == ';';
bool ends_with_backslash = line[ws - 1] == '\\';
has_vertical_output_suffix = (ws >= 2) && (line[ws - 2] == '\\') && (line[ws - 1] == 'G');
if (ends_with_backslash)
line = line.substr(0, ws - 1);
query += line;
if (!ends_with_backslash && (ends_with_semicolon || has_vertical_output_suffix || (!config().has("multiline") && !hasDataInSTDIN())))
{
if (query != prev_query)
{
/// Replace line breaks with spaces to prevent the following problem.
/// Every line of multi-line query is saved to history file as a separate line.
/// If the user restarts the client then after pressing the "up" button
/// every line of the query will be displayed separately.
std::string logged_query = query;
std::replace(logged_query.begin(), logged_query.end(), '\n', ' ');
add_history(logged_query.c_str());
#if USE_READLINE && HAVE_READLINE_HISTORY
if (!history_file.empty() && append_history(1, history_file.c_str()))
throwFromErrno("Cannot append history to file " + history_file, ErrorCodes::CANNOT_APPEND_HISTORY);
#endif
prev_query = query;
}
if (has_vertical_output_suffix)
query = query.substr(0, query.length() - 2);
try
{
/// Determine the terminal size.
ioctl(0, TIOCGWINSZ, &terminal_size);
if (!process(query))
break;
}
catch (const Exception & e)
{
std::cerr << std::endl
<< "Exception on client:" << std::endl
<< "Code: " << e.code() << ". " << e.displayText() << std::endl
<< 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();
}
query = "";
}
else
{
query += '\n';
}
}
}
void nonInteractive()
{
String text;
if (config().has("query"))
text = config().getString("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);
}
process(text);
}
bool process(const String & text)
{
const auto ignore_error = config().getBool("ignore-error", false);
if (config().has("multiquery"))
{
/// Several queries separated by ';'.
/// INSERT data is ended by the end of line, not ';'.
String query;
const char * begin = text.data();
const char * end = begin + text.size();
while (begin < end)
{
const char * pos = begin;
ASTPtr ast = parseQuery(pos, end, true);
if (!ast)
{
if (ignore_error)
{
Tokens tokens(begin, end);
TokenIterator token_iterator(tokens);
while (token_iterator->type != TokenType::Semicolon && token_iterator.isValid())
++token_iterator;
begin = token_iterator->end;
continue;
}
return true;
}
ASTInsertQuery * insert = typeid_cast<ASTInsertQuery *>(&*ast);
if (insert && insert->data)
{
pos = find_first_symbols<'\n'>(insert->data, end);
insert->end = pos;
}
query = text.substr(begin - text.data(), pos - begin);
begin = pos;
while (isWhitespaceASCII(*begin) || *begin == ';')
++begin;
try
{
if (!processSingleQuery(query, ast) && !ignore_error)
return false;
}
catch (...)
{
std::cerr << "Error on processing query: " << query << std::endl << getCurrentExceptionMessage(true);
got_exception = true;
}
if (got_exception && !ignore_error)
{
if (is_interactive)
break;
else
return false;
}
}
return true;
}
else
{
return processSingleQuery(text);
}
}
bool processSingleQuery(const String & line, ASTPtr parsed_query_ = nullptr)
{
if (exit_strings.end() != exit_strings.find(line))
return false;
resetOutput();
got_exception = false;
if (echo_queries)
{
writeString(line, std_out);
writeChar('\n', std_out);
std_out.next();
}
watch.restart();
query = line;
/// Some parts of a query (result output and formatting) are executed client-side.
/// Thus we need to parse the query.
parsed_query = parsed_query_;
if (!parsed_query)
{
const char * begin = query.data();
parsed_query = parseQuery(begin, begin + query.size(), false);
}
if (!parsed_query)
return true;
processed_rows = 0;
progress.reset();
show_progress_bar = false;
written_progress_chars = 0;
written_first_block = false;
const ASTSetQuery * set_query = typeid_cast<const ASTSetQuery *>(&*parsed_query);
const ASTUseQuery * use_query = typeid_cast<const ASTUseQuery *>(&*parsed_query);
/// INSERT query for which data transfer is needed (not an INSERT SELECT) is processed separately.
const ASTInsertQuery * insert = typeid_cast<const ASTInsertQuery *>(&*parsed_query);
connection->forceConnected();
if (insert && !insert->select)
processInsertQuery();
else
processOrdinaryQuery();
/// Do not change context (current DB, settings) in case of an exception.
if (!got_exception)
{
if (set_query)
{
/// 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.setSetting(change.name, change.value);
}
}
if (use_query)
{
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.rows >= 1000)
writeFinalProgress();
std::cout << std::endl << std::endl;
}
else if (print_time_to_stderr)
{
std::cerr << watch.elapsedSeconds() << "\n";
}
return true;
}
/// Convert external tables to ExternalTableData and send them using the connection.
void sendExternalTables()
{
auto * select = typeid_cast<const ASTSelectWithUnionQuery *>(&*parsed_query);
if (!select && !external_tables.empty())
throw Exception("External tables could be sent only with select query", ErrorCodes::BAD_ARGUMENTS);
std::vector<ExternalTableData> data;
for (auto & table : external_tables)
data.emplace_back(table.getData(context));
connection->sendExternalTablesData(data);
}
/// Process the query that doesn't require transfering data blocks to the server.
void processOrdinaryQuery()
{
connection->sendQuery(query, query_id, QueryProcessingStage::Complete, &context.getSettingsRef(), nullptr, true);
sendExternalTables();
receiveResult();
}
/// Process the query that requires transfering data blocks to the server.
void processInsertQuery()
{
/// Send part of query without data, because data will be sent separately.
const ASTInsertQuery & parsed_insert_query = typeid_cast<const ASTInsertQuery &>(*parsed_query);
String query_without_data = parsed_insert_query.data
? query.substr(0, parsed_insert_query.data - query.data())
: query;
if (!parsed_insert_query.data && (is_interactive || (stdin_is_not_tty && std_in.eof())))
throw Exception("No data to insert", ErrorCodes::NO_DATA_TO_INSERT);
connection->sendQuery(query_without_data, query_id, QueryProcessingStage::Complete, &context.getSettingsRef(), nullptr, true);
sendExternalTables();
/// Receive description of table structure.
Block sample;
if (receiveSampleBlock(sample))
{
/// If structure was received (thus, server has not thrown an exception),
/// send our data with that structure.
sendData(sample);
receivePacket();
}
}
ASTPtr parseQuery(const char * & pos, const char * end, bool allow_multi_statements)
{
ParserQuery parser(end);
ASTPtr res;
const auto ignore_error = config().getBool("ignore-error", false);
if (is_interactive || ignore_error)
{
String message;
res = tryParseQuery(parser, pos, end, message, true, "", allow_multi_statements, 0);
if (!res)
{
std::cerr << std::endl << message << std::endl << std::endl;
return nullptr;
}
}
else
res = parseQueryAndMovePosition(parser, pos, end, "", allow_multi_statements, 0);
if (is_interactive)
{
std::cout << std::endl;
formatAST(*res, std::cout);
std::cout << std::endl << std::endl;
}
return res;
}
void sendData(Block & sample)
{
/// If INSERT data must be sent.
const ASTInsertQuery * parsed_insert_query = typeid_cast<const ASTInsertQuery *>(&*parsed_query);
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);
}
else if (!is_interactive)
{
/// Send data read from stdin.
sendDataFrom(std_in, sample);
}
else
throw Exception("No data to insert", ErrorCodes::NO_DATA_TO_INSERT);
}
void sendDataFrom(ReadBuffer & buf, Block & sample)
{
String current_format = insert_format;
/// Data format can be specified in the INSERT query.
if (ASTInsertQuery * insert = typeid_cast<ASTInsertQuery *>(&*parsed_query))
if (!insert->format.empty())
current_format = insert->format;
BlockInputStreamPtr block_input = context.getInputFormat(
current_format, buf, sample, insert_format_max_block_size);
BlockInputStreamPtr async_block_input = std::make_shared<AsynchronousBlockInputStream>(block_input);
async_block_input->readPrefix();
while (true)
{
Block block = async_block_input->read();
connection->sendData(block);
processed_rows += block.rows();
if (!block)
break;
}
async_block_input->readSuffix();
}
/// Flush all buffers.
void resetOutput()
{
block_out_stream = nullptr;
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();
}
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;
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)
{
if (interrupt_listener.check())
{
connection->sendCancel();
cancelled = true;
if (is_interactive)
std::cout << "Cancelling query." << std::endl;
/// Pressing Ctrl+C twice results in shut down.
interrupt_listener.unblock();
}
else if (!connection->poll(1000000))
continue; /// If there is no new data, continue checking whether the query was cancelled after a timeout.
}
if (!receivePacket())
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.
bool receivePacket()
{
Connection::Packet packet = connection->receivePacket();
switch (packet.type)
{
case Protocol::Server::Data:
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:
onTotals(packet.block);
return true;
case Protocol::Server::Extremes:
onExtremes(packet.block);
return true;
case Protocol::Server::Exception:
onException(*packet.exception);
last_exception = std::move(packet.exception);
return false;
case Protocol::Server::EndOfStream:
onEndOfStream();
return false;
default:
throw Exception("Unknown packet from server", ErrorCodes::UNKNOWN_PACKET_FROM_SERVER);
}
}
/// Receive the block that serves as an example of the structure of table where data will be inserted.
bool receiveSampleBlock(Block & out)
{
Connection::Packet packet = connection->receivePacket();
switch (packet.type)
{
case Protocol::Server::Data:
out = packet.block;
return true;
case Protocol::Server::Exception:
onException(*packet.exception);
last_exception = std::move(packet.exception);
return false;
default:
throw NetException("Unexpected packet from server (expected Data, got "
+ String(Protocol::Server::toString(packet.type)) + ")", ErrorCodes::UNEXPECTED_PACKET_FROM_SERVER);
}
}
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.
if (ASTQueryWithOutput * query_with_output = dynamic_cast<ASTQueryWithOutput *>(&*parsed_query))
{
if (query_with_output->out_file != nullptr)
{
const auto & out_file_node = typeid_cast<const ASTLiteral &>(*query_with_output->out_file);
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 = typeid_cast<const ASTIdentifier &>(*query_with_output->format);
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 onData(Block & block)
{
if (written_progress_chars)
clearProgress();
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.
if (block.rows() != 0)
{
block_out_stream->write(block);
written_first_block = true;
}
/// Received data block is immediately displayed to the user.
block_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)
{
progress.incrementPiecewiseAtomically(value);
if (block_out_stream)
block_out_stream->onProgress(value);
writeProgress();
}
void clearProgress()
{
std::cerr << RESTORE_CURSOR_POSITION CLEAR_TO_END_OF_LINE;
written_progress_chars = 0;
}
void writeProgress()
{
if (!need_render_progress)
return;
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",
};
if (written_progress_chars)
clearProgress();
else
std::cerr << SAVE_CURSOR_POSITION;
std::stringstream message;
message << indicators[increment % 8]
<< std::fixed << std::setprecision(3)
<< " Progress: ";
message
<< formatReadableQuantity(progress.rows) << " rows, "
<< formatReadableSizeWithDecimalSuffix(progress.bytes);
size_t elapsed_ns = watch.elapsed();
if (elapsed_ns)
message << " ("
<< formatReadableQuantity(progress.rows * 1000000000.0 / elapsed_ns) << " rows/s., "
<< formatReadableSizeWithDecimalSuffix(progress.bytes * 1000000000.0 / elapsed_ns) << "/s.) ";
else
message << ". ";
written_progress_chars = message.str().size() - (increment % 8 == 7 ? 10 : 13);
std::cerr << DISABLE_LINE_WRAPPING << message.rdbuf();
/// If the approximate number of rows to process is known, we can display a progress bar and percentage.
if (progress.total_rows > 0)
{
size_t total_rows_corrected = std::max(progress.rows, progress.total_rows);
/// 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.rows * 2 < total_rows_corrected)
show_progress_bar = true;
if (show_progress_bar)
{
ssize_t width_of_progress_bar = static_cast<ssize_t>(terminal_size.ws_col) - written_progress_chars - strlen(" 99%");
if (width_of_progress_bar > 0)
{
std::string bar = UnicodeBar::render(UnicodeBar::getWidth(progress.rows, 0, total_rows_corrected, width_of_progress_bar));
std::cerr << "\033[0;32m" << bar << "\033[0m";
if (width_of_progress_bar > static_cast<ssize_t>(bar.size() / UNICODE_BAR_CHAR_SIZE))
std::cerr << std::string(width_of_progress_bar - bar.size() / UNICODE_BAR_CHAR_SIZE, ' ');
}
}
}
/// Underestimate percentage a bit to avoid displaying 100%.
std::cerr << ' ' << (99 * progress.rows / total_rows_corrected) << '%';
}
std::cerr << ENABLE_LINE_WRAPPING;
++increment;
}
void writeFinalProgress()
{
std::cout << "Processed "
<< formatReadableQuantity(progress.rows) << " rows, "
<< formatReadableSizeWithDecimalSuffix(progress.bytes);
size_t elapsed_ns = watch.elapsed();
if (elapsed_ns)
std::cout << " ("
<< formatReadableQuantity(progress.rows * 1000000000.0 / elapsed_ns) << " rows/s., "
<< formatReadableSizeWithDecimalSuffix(progress.bytes * 1000000000.0 / elapsed_ns) << "/s.) ";
else
std::cout << ". ";
}
void onException(const Exception & e)
{
resetOutput();
got_exception = true;
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);
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()
{
if (block_out_stream)
block_out_stream->writeSuffix();
resetOutput();
if (is_interactive && !written_first_block)
std::cout << "Ok." << std::endl;
}
void showClientVersion()
{
std::cout << "ClickHouse client version " << DBMS_VERSION_MAJOR
<< "." << DBMS_VERSION_MINOR
<< "." << ClickHouseRevision::get()
<< "." << 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.
* Split these groups before processing.
*/
using Arguments = std::vector<const char *>;
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;
common_arguments.emplace_back(arg);
}
}
ioctl(0, TIOCGWINSZ, &terminal_size);
unsigned line_length = boost::program_options::options_description::m_default_line_length;
unsigned min_description_length = line_length / 2;
if (!stdin_is_not_tty)
{
line_length = std::max(3U, static_cast<unsigned>(terminal_size.ws_col));
min_description_length = std::min(min_description_length, line_length - 2);
}
#define DECLARE_SETTING(TYPE, NAME, DEFAULT, DESCRIPTION) (#NAME, boost::program_options::value<std::string> (), DESCRIPTION)
/// Main commandline options related to client functionality and all parameters from Settings.
boost::program_options::options_description main_description("Main options", line_length, min_description_length);
main_description.add_options()
("help", "produce help message")
("config-file,c", boost::program_options::value<std::string>(), "config-file path")
("host,h", boost::program_options::value<std::string>()->default_value("localhost"), "server host")
("port", boost::program_options::value<int>()->default_value(9000), "server port")
("secure,s", "secure")
("user,u", boost::program_options::value<std::string>()->default_value("default"), "user")
("password", boost::program_options::value<std::string>(), "password")
("ask-password", "ask-password")
("query_id", boost::program_options::value<std::string>(), "query_id")
("query,q", boost::program_options::value<std::string>(), "query")
("database,d", boost::program_options::value<std::string>(), "database")
("suggestion_limit", boost::program_options::value<int>()->default_value(suggestion_limit), "Limit number of tables for suggestion")
("pager", boost::program_options::value<std::string>(), "pager")
("multiline,m", "multiline")
("multiquery,n", "multiquery")
("ignore-error", "Do not stop processing in multiquery mode")
("format,f", boost::program_options::value<std::string>(), "default output format")
("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")
("echo", "in batch mode, print query before execution")
("max_client_network_bandwidth", boost::program_options::value<int>(), "the maximum speed of data exchange over the network for the client in bytes per second.")
("compression", boost::program_options::value<bool>(), "enable or disable compression")
APPLY_FOR_SETTINGS(DECLARE_SETTING)
;
#undef DECLARE_SETTING
/// Commandline options related to external tables.
boost::program_options::options_description external_description("External tables options");
external_description.add_options()
("file", boost::program_options::value<std::string>(), "data file or - for stdin")
("name", boost::program_options::value<std::string>()->default_value("_data"), "name of the table")
("format", boost::program_options::value<std::string>()->default_value("TabSeparated"), "data format")
("structure", boost::program_options::value<std::string>(), "structure")
("types", boost::program_options::value<std::string>(), "types")
;
/// Parse main commandline options.
boost::program_options::parsed_options parsed = boost::program_options::command_line_parser(
common_arguments.size(), common_arguments.data()).options(main_description).run();
boost::program_options::variables_map options;
boost::program_options::store(parsed, options);
if (options.count("version") || options.count("V"))
{
showClientVersion();
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";
exit(0);
}
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.
boost::program_options::parsed_options parsed = boost::program_options::command_line_parser(
external_tables_arguments[i].size(), external_tables_arguments[i].data()).options(external_description).run();
boost::program_options::variables_map external_options;
boost::program_options::store(parsed, 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;
exit(e.code());
}
}
/// Extract settings from the options.
#define EXTRACT_SETTING(TYPE, NAME, DEFAULT, DESCRIPTION) \
if (options.count(#NAME)) \
context.setSetting(#NAME, options[#NAME].as<std::string>());
APPLY_FOR_SETTINGS(EXTRACT_SETTING)
#undef EXTRACT_SETTING
/// 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("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"))
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("multiline"))
config().setBool("multiline", true);
if (options.count("multiquery"))
config().setBool("multiquery", 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("suggestion_limit"))
config().setInt("suggestion_limit", options["suggestion_limit"].as<int>());
}
void sendQuery(const String &query_, std::vector<Block> &blockVector)
{
connection->sendQuery(
query_,
query_id,
QueryProcessingStage::Complete,
&context.getSettingsRef(),
nullptr,
true
);
bool continueReceiving = true;
connection->forceConnected();
do {
try {
Connection::Packet packet = connection->receivePacket();
continueReceiving = packet.type != Protocol::Server::EndOfStream
&& packet.type != Protocol::Server::Exception;
if (!packet.block || !packet.block.rows()) {
continue;
}
blockVector.emplace_back(packet.block);
} catch (...) {
continueReceiving = false;
}
} while (continueReceiving);
}
};
}
int mainEntryClickHouseClient(int argc, char ** argv)
{
DB::Client client;
try
{
client.init(argc, argv);
}
catch (const boost::program_options::error & e)
{
std::cerr << "Bad arguments: " << e.what() << std::endl;
return 1;
}
return client.run();
}
char ** query_parts_completion(const char *text, int start, int end)
{
rl_attempted_completion_over = start + end + 1;
return rl_completion_matches(text, query_parts_generator);
}
char * query_parts_generator(const char *text, int state)
{
static int text_length;
static Completion::Entry *entry;
char * found;
if (!state) text_length = (uint) strlen(text);
if (text_length > 0) {
if (!state) {
entry = completionNode.find_all(text);
if (!entry) return (char *) nullptr;
}
if (entry) {
found = strdup(entry->text);
entry = entry->next;
return found;
}
}
return (char *) nullptr;
}
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