ClickHouse/libs/libmysqlxx/src/Query.cpp

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#include <mysqlxx/Connection.h>
#include <mysqlxx/Query.h>
namespace mysqlxx
{
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Query::Query(Connection * conn_, const std::string & query_string) : std::ostream(0), conn(conn_)
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{
/// Важно в случае, если Query используется не из того же потока, что Connection.
my_thread_init();
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init(&query_buf);
if (!query_string.empty())
{
query_buf.str(query_string);
seekp(0, std::ios::end);
}
imbue(std::locale::classic());
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}
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Query::Query(const Query & other) : std::ostream(0), conn(other.conn)
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{
/// Важно в случае, если Query используется не из того же потока, что Connection.
my_thread_init();
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init(&query_buf);
imbue(std::locale::classic());
*this << other.str();
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}
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Query & Query::operator= (const Query & other)
{
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conn = other.conn;
seekp(0);
clear();
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*this << other.str();
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return *this;
}
Query::~Query()
{
my_thread_end();
}
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void Query::reset()
{
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seekp(0);
clear();
query_buf.str("");
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}
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void Query::executeImpl()
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{
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std::string query_string = query_buf.str();
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if (mysql_real_query(conn->getDriver(), query_string.data(), query_string.size()))
throw BadQuery(errorMessage(conn->getDriver()), mysql_errno(conn->getDriver()));
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}
UseQueryResult Query::use()
{
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executeImpl();
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MYSQL_RES * res = mysql_use_result(conn->getDriver());
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if (!res)
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onError(conn->getDriver());
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return UseQueryResult(res, conn, this);
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}
StoreQueryResult Query::store()
{
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executeImpl();
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MYSQL_RES * res = mysql_store_result(conn->getDriver());
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if (!res)
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checkError(conn->getDriver());
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return StoreQueryResult(res, conn, this);
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}
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void Query::execute()
{
executeImpl();
}
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UInt64 Query::insertID()
{
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return mysql_insert_id(conn->getDriver());
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}
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}