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-rw-r--r--sql/sql_time.cc2
1 files changed, 1 insertions, 1 deletions
diff --git a/sql/sql_time.cc b/sql/sql_time.cc
index e3116f73edc..cdb9f4e5b79 100644
--- a/sql/sql_time.cc
+++ b/sql/sql_time.cc
@@ -190,7 +190,7 @@ bool get_date_from_daynr(long daynr,uint *ret_year,uint *ret_month,
ulong convert_period_to_month(ulong period)
{
ulong a,b;
- if (period == 0)
+ if (period == 0 || period > 999912)
return 0L;
if ((a=period/100) < YY_PART_YEAR)
a+=2000;