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Bug #35396: Abnormal query times in slow query log

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If the system time is adjusted back during a query execution
(resulting in the end time being earlier than the start time)
the code that prints to the slow query log gets confused and 
prints unsigned negative numbers.
            
Fixed by not logging the statements that would have negative
execution time due to time shifts.
No test case since this would involve changing the system time.
This commit is contained in:
Georgi Kodinov
2009-01-29 14:40:48 +02:00
parent 6a834d1f4f
commit 63ed1e4964
1 changed files with 3 additions and 2 deletions
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5
sql/sql_parse.cc
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@ -2333,8 +2333,9 @@ void log_slow_statement(THD *thd)
{
thd->proc_info="logging slow query";
if ((ulong) (thd->start_time - thd->time_after_lock) >
thd->variables.long_query_time ||
if ((thd->start_time > thd->time_after_lock &&
(ulong) (thd->start_time - thd->time_after_lock) >
thd->variables.long_query_time) ||
(thd->server_status &
(SERVER_QUERY_NO_INDEX_USED | SERVER_QUERY_NO_GOOD_INDEX_USED)) &&
opt_log_queries_not_using_indexes &&