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SQL: Backup_query_start_time RAII

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This commit is contained in:
Aleksey Midenkov 2018-01-09 15:28:08 +03:00
parent 3395ab7324
commit 07b1a77430
2 changed files with 28 additions and 9 deletions
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7
sql/sp_head.cc
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@ -3273,7 +3273,7 @@ sp_instr_stmt::execute(THD *thd, uint *nextp)
int res;
bool save_enable_slow_log;
const CSET_STRING query_backup= thd->query_string;
QUERY_START_TIME_INFO time_info;
Backup_query_start_time time_info;
Sub_statement_state backup_state;
DBUG_ENTER("sp_instr_stmt::execute");
DBUG_PRINT("info", ("command: %d", m_lex_keeper.sql_command()));
@ -3289,7 +3289,7 @@ sp_instr_stmt::execute(THD *thd, uint *nextp)
Save start time info for the CALL statement and overwrite it with the
current time for log_slow_statement() to log the individual query timing.
*/
thd->backup_query_start_time(&time_info);
time_info.backup(*thd);
thd->set_time();
}
thd->store_slow_query_state(&backup_state);
@ -3355,9 +3355,6 @@ sp_instr_stmt::execute(THD *thd, uint *nextp)
thd->get_stmt_da()->reset_diagnostics_area();
}
}
/* Restore the original query start time */
if (thd->enable_slow_log)
thd->restore_query_start_time(&time_info);
DBUG_RETURN(res || thd->is_error());
}

30
sql/sql_class.h
View File

@ -2085,14 +2085,36 @@ struct QUERY_START_TIME_INFO
my_time_t start_time;
ulong start_time_sec_part;
ulonglong start_utime, utime_after_lock;
};
void backup_query_start_time(QUERY_START_TIME_INFO *backup)
class Backup_query_start_time : public QUERY_START_TIME_INFO
{
*backup= *this;
QUERY_START_TIME_INFO *m_origin;
public:
Backup_query_start_time() : m_origin(NULL)
{}
Backup_query_start_time(QUERY_START_TIME_INFO &origin)
{
backup(origin);
}
void restore_query_start_time(QUERY_START_TIME_INFO *backup)
~Backup_query_start_time()
{
*this= *backup;
restore();
}
void backup(QUERY_START_TIME_INFO &origin)
{
m_origin= &origin;
QUERY_START_TIME_INFO *backup_= this;
*backup_= origin;
}
void restore()
{
if (m_origin)
{
*m_origin= *this;
m_origin= NULL;
}
}
};