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-rw-r--r--sql/sql_show.cc3
1 files changed, 2 insertions, 1 deletions
diff --git a/sql/sql_show.cc b/sql/sql_show.cc
index b61bfe2aa57..ff5f732108b 100644
--- a/sql/sql_show.cc
+++ b/sql/sql_show.cc
@@ -2646,7 +2646,8 @@ int fill_schema_processlist(THD* thd, TABLE_LIST* tables, COND* cond)
command_name[tmp->command].length, cs);
/* MYSQL_TIME */
ulonglong start_utime= tmp->start_time * HRTIME_RESOLUTION + tmp->start_time_sec_part;
- ulonglong utime= start_utime < unow.val ? unow.val - start_utime : 0;
+ ulonglong utime= start_utime && start_utime < unow.val
+ ? unow.val - start_utime : 0;
table->field[5]->store(utime / HRTIME_RESOLUTION, TRUE);
/* STATE */
if ((val= thread_state_info(tmp)))