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https://github.com/boostorg/mysql.git
synced 2026-02-15 01:02:17 +00:00
Moved all names into namespace boost::mysql
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@@ -6,6 +6,9 @@
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#include <boost/asio/yield.hpp>
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#include <iostream>
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using boost::mysql::error_code;
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using boost::mysql::error_info;
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/**
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* For this example, we will be using the 'mysql_asio_examples' database.
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* You can get this database by running db_setup.sql.
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@@ -18,16 +21,19 @@
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* please have a look to the query_sync.cpp example.
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*/
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void print_employee(const mysql::row& employee)
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void print_employee(const boost::mysql::row& employee)
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{
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using mysql::operator<<; // Required for mysql::value objects to be streamable, due to ADL rules
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using boost::mysql::operator<<; // Required for mysql::value objects to be streamable, due to ADL rules
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std::cout << "Employee '"
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<< employee.values()[0] << " " // first_name (type std::string_view)
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<< employee.values()[1] << "' earns " // last_name (type std::string_view)
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<< employee.values()[2] << " dollars yearly\n"; // salary (type double)
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}
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void die_on_error(const mysql::error_code& err, const mysql::error_info& info = mysql::error_info())
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void die_on_error(
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const error_code& err,
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const boost::mysql::error_info& info = boost::mysql::error_info()
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)
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{
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if (err)
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{
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@@ -39,13 +45,13 @@ void die_on_error(const mysql::error_code& err, const mysql::error_info& info =
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class application
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{
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boost::asio::ip::tcp::endpoint ep;
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mysql::connection_params conn_params;
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boost::mysql::connection_params conn_params;
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boost::asio::io_context ctx;
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mysql::tcp_connection connection;
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mysql::tcp_resultset resultset;
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boost::mysql::tcp_connection connection;
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boost::mysql::tcp_resultset resultset;
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public:
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application(const char* username, const char* password) :
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ep (boost::asio::ip::address_v4::loopback(), mysql::default_port),
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ep (boost::asio::ip::address_v4::loopback(), boost::mysql::default_port),
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conn_params(username, password, "mysql_asio_examples"),
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connection(ctx)
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{
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@@ -55,9 +61,9 @@ public:
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void connect()
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{
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connection.next_level().async_connect(ep, [this](mysql::error_code err) {
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connection.next_level().async_connect(ep, [this](error_code err) {
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die_on_error(err);
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connection.async_handshake(conn_params, [this](mysql::error_code err, const mysql::error_info& info) {
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connection.async_handshake(conn_params, [this](error_code err, const error_info& info) {
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die_on_error(err, info);
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query_employees();
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});
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@@ -67,12 +73,12 @@ public:
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void query_employees()
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{
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const char* sql = "SELECT first_name, last_name, salary FROM employee WHERE company_id = 'HGS'";
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connection.async_query(sql, [this](mysql::error_code err, const mysql::error_info& info,
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mysql::tcp_resultset&& result
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connection.async_query(sql, [this](error_code err, const error_info& info,
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boost::mysql::tcp_resultset&& result
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) {
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die_on_error(err, info);
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resultset = std::move(result);
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resultset.async_fetch_all([this](mysql::error_code err, const mysql::error_info& info, const auto& rows) {
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resultset.async_fetch_all([this](error_code err, const error_info& info, const auto& rows) {
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die_on_error(err, info);
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for (const auto& employee: rows)
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{
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@@ -86,8 +92,8 @@ public:
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void update_slacker()
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{
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const char* sql = "UPDATE employee SET salary = 15000 WHERE last_name = 'Slacker'";
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connection.async_query(sql, [this](mysql::error_code err, const mysql::error_info& info,
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[[maybe_unused]] mysql::tcp_resultset&& result) {
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connection.async_query(sql, [this](error_code err, const error_info& info,
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[[maybe_unused]] boost::mysql::tcp_resultset&& result) {
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die_on_error(err, info);
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assert(result.fields().size() == 0);
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query_intern();
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@@ -97,11 +103,11 @@ public:
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void query_intern()
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{
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const char* sql = "SELECT salary FROM employee WHERE last_name = 'Slacker'";
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connection.async_query(sql, [this](const mysql::error_code& err, mysql::error_info info,
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mysql::tcp_resultset&& result) {
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connection.async_query(sql, [this](const error_code& err, error_info info,
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boost::mysql::tcp_resultset&& result) {
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die_on_error(err, info);
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resultset = std::move(result);
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resultset.async_fetch_all([](const mysql::error_code& err, mysql::error_info info, const auto& rows) {
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resultset.async_fetch_all([](const error_code& err, error_info info, const auto& rows) {
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die_on_error(err, info);
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assert(rows.size() == 1);
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[[maybe_unused]] auto salary = std::get<double>(rows[0].values()[0]);
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