backport #41470, commit 62661

mysql-test/r/date_formats.result

@@ -593,3 +593,13 @@ select str_to_date('04/30/2004 ', '%m/%d/%Y ');
 str_to_date('04/30/2004 ', '%m/%d/%Y ')
 2004-04-30
 "End of 4.1 tests"
+SELECT DATE_FORMAT("0000-01-01",'%W %d %M %Y') as valid_date;
+valid_date
+Sunday 01 January 0000
+SELECT DATE_FORMAT("0000-02-28",'%W %d %M %Y') as valid_date;
+valid_date
+Tuesday 28 February 0000
+SELECT DATE_FORMAT("2009-01-01",'%W %d %M %Y') as valid_date;
+valid_date
+Thursday 01 January 2009
+"End of 5.0 tests"

mysql-test/t/date_formats.test

@@ -337,3 +337,15 @@ select str_to_date('04/30 /2004', '%m /%d /%Y');
 select str_to_date('04/30/2004 ', '%m/%d/%Y ');
 
 --echo "End of 4.1 tests"
+
+#
+# Bug #41470: DATE_FORMAT() crashes the complete server with a valid date
+#
+
+# show that these two do not crash the server:
+SELECT DATE_FORMAT("0000-01-01",'%W %d %M %Y') as valid_date;
+SELECT DATE_FORMAT("0000-02-28",'%W %d %M %Y') as valid_date;
+# show that date within the Gregorian range render correct results: (THU)
+SELECT DATE_FORMAT("2009-01-01",'%W %d %M %Y') as valid_date;
+
+--echo "End of 5.0 tests"

sql-common/my_time.c

@@ -765,19 +765,20 @@ long calc_daynr(uint year,uint month,uint day)
 {
   long delsum;
   int temp;
+  int y= year;                                  /* may be < 0 temporarily */
   DBUG_ENTER("calc_daynr");
 
-  if (year == 0 && month == 0 && day == 0)
+  if (y == 0 && month == 0 && day == 0)
     DBUG_RETURN(0);				/* Skip errors */
-  delsum= (long) (365L * year+ 31*(month-1) +day);
+  delsum= (long) (365L * y+ 31*(month-1) +day);
   if (month <= 2)
-      year--;
+      y--;
   else
     delsum-= (long) (month*4+23)/10;
-  temp=(int) ((year/100+1)*3)/4;
+  temp=(int) ((y/100+1)*3)/4;
   DBUG_PRINT("exit",("year: %d  month: %d  day: %d -> daynr: %ld",
-		     year+(month <= 2),month,day,delsum+year/4-temp));
-  DBUG_RETURN(delsum+(int) year/4-temp);
+		     y+(month <= 2),month,day,delsum+y/4-temp));
+  DBUG_RETURN(delsum+(int) y/4-temp);
 } /* calc_daynr */