ClickHouse/base/mysqlxx/Query.cpp

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#if __has_include(<mysql.h>)
#include <errmsg.h>
#include <mysql.h>
#else
#include <mysql/errmsg.h>
#include <mysql/mysql.h>
#endif
#include <Poco/Logger.h>
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#include <mysqlxx/Connection.h>
#include <mysqlxx/Query.h>
#include <mysqlxx/Types.h>
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namespace mysqlxx
{
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Query::Query(Connection * conn_, const std::string & query_string) : conn(conn_)
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{
/// Важно в случае, если Query используется не из того же потока, что Connection.
mysql_thread_init();
if (!query_string.empty())
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query_buf << query_string;
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query_buf.imbue(std::locale::classic());
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}
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Query::Query(const Query & other) : conn(other.conn)
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{
/// Важно в случае, если Query используется не из того же потока, что Connection.
mysql_thread_init();
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query_buf.imbue(std::locale::classic());
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*this << other.str();
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}
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Query & Query::operator= (const Query & other)
{
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if (this == &other)
return *this;
conn = other.conn;
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query_buf.str(other.str());
return *this;
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}
Query::~Query()
{
mysql_thread_end();
}
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void Query::reset()
{
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query_buf.str({});
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}
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void Query::executeImpl()
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{
std::string query_string = query_buf.str();
MYSQL* mysql_driver = conn->getDriver();
auto & logger = Poco::Logger::get("mysqlxx::Query");
logger.trace("Running MySQL query using connection %lu", mysql_thread_id(mysql_driver));
if (mysql_real_query(mysql_driver, query_string.data(), query_string.size()))
{
const auto err_no = mysql_errno(mysql_driver);
switch (err_no)
{
case CR_SERVER_GONE_ERROR:
[[fallthrough]];
case CR_SERVER_LOST:
throw ConnectionLost(errorMessage(mysql_driver), err_no);
default:
throw BadQuery(errorMessage(mysql_driver), err_no);
}
}
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}
UseQueryResult Query::use()
{
executeImpl();
MYSQL_RES * res = mysql_use_result(conn->getDriver());
if (!res)
onError(conn->getDriver());
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return UseQueryResult(res, conn, this);
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}
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void Query::execute()
{
executeImpl();
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}
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UInt64 Query::insertID()
{
return mysql_insert_id(conn->getDriver());
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}
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}