MDEV-7831 Bad warning for DATE_ADD(timestamp_column, INTERVAL 10 SECOND)

mysql-test/r/partition_datatype.result

@@ -699,7 +699,7 @@ a	tz
 2038-01-19 03:14:06	Moscow
 UPDATE t2 SET a = TIMESTAMPADD(SECOND, 1, a);
 Warnings:
-Warning	1292	Incorrect datetime value: '0000-00-00'
+Warning	1292	Incorrect datetime value: '0000-00-00 00:00:00'
 Warning	1264	Out of range value for column 'a' at row 34
 Warning	1264	Out of range value for column 'a' at row 35
 SELECT MIN(a), MAX(a) FROM t2;
@@ -782,9 +782,9 @@ a	tz
 2011-10-30 00:00:02	Moscow
 UPDATE t2 SET a = TIMESTAMPADD(SECOND, -1, a);
 Warnings:
-Warning	1292	Incorrect datetime value: '0000-00-00'
-Warning	1292	Incorrect datetime value: '0000-00-00'
-Warning	1292	Incorrect datetime value: '0000-00-00'
+Warning	1292	Incorrect datetime value: '0000-00-00 00:00:00'
+Warning	1292	Incorrect datetime value: '0000-00-00 00:00:00'
+Warning	1292	Incorrect datetime value: '0000-00-00 00:00:00'
 SELECT MIN(a), MAX(a) FROM t2;
 MIN(a)	MAX(a)
 1970-01-01 00:00:01	2038-01-19 03:14:06
@@ -1179,7 +1179,7 @@ a	tz
 2038-01-19 06:14:06	Moscow
 UPDATE t2 SET a = TIMESTAMPADD(SECOND, 1, a);
 Warnings:
-Warning	1292	Incorrect datetime value: '0000-00-00'
+Warning	1292	Incorrect datetime value: '0000-00-00 00:00:00'
 Warning	1299	Invalid TIMESTAMP value in column 'a' at row 8
 Warning	1299	Invalid TIMESTAMP value in column 'a' at row 9
 Warning	1264	Out of range value for column 'a' at row 34
@@ -1264,9 +1264,9 @@ a	tz
 2011-10-30 03:00:02	Moscow
 UPDATE t2 SET a = TIMESTAMPADD(SECOND, -1, a);
 Warnings:
-Warning	1292	Incorrect datetime value: '0000-00-00'
-Warning	1292	Incorrect datetime value: '0000-00-00'
-Warning	1292	Incorrect datetime value: '0000-00-00'
+Warning	1292	Incorrect datetime value: '0000-00-00 00:00:00'
+Warning	1292	Incorrect datetime value: '0000-00-00 00:00:00'
+Warning	1292	Incorrect datetime value: '0000-00-00 00:00:00'
 Warning	1299	Invalid TIMESTAMP value in column 'a' at row 18
 Warning	1299	Invalid TIMESTAMP value in column 'a' at row 19
 SELECT MIN(a), MAX(a) FROM t2;

mysql-test/r/type_timestamp.result

@@ -691,3 +691,20 @@ drop function f1;
 set timestamp=0;
 SET time_zone=DEFAULT;
 End of 10.0 tests
+#
+# Start of 10.1 tests
+#
+#
+# MDEV-7831 Bad warning for DATE_ADD(timestamp_column, INTERVAL 10 SECOND) 
+#
+CREATE TABLE t1 (a TIMESTAMP);
+INSERT INTO t1 VALUES ('0000-00-00 00:00:00');
+SELECT DATE_ADD(a, INTERVAL 10 SECOND) FROM t1;
+DATE_ADD(a, INTERVAL 10 SECOND)
+NULL
+Warnings:
+Warning	1292	Incorrect datetime value: '0000-00-00 00:00:00'
+DROP TABLE t1;
+#
+# End of 10.1 tests
+#

mysql-test/suite/vcol/r/vcol_misc.result

@@ -188,10 +188,10 @@ tsv TIMESTAMP AS (ADDDATE(ts, INTERVAL 1 DAY)) VIRTUAL
 ) ENGINE=MyISAM;
 INSERT INTO t1 (tsv) VALUES (DEFAULT);
 Warnings:
-Warning	1292	Incorrect datetime value: '0000-00-00'
+Warning	1292	Incorrect datetime value: '0000-00-00 00:00:00'
 INSERT DELAYED INTO t1 (tsv) VALUES (DEFAULT);
 Warnings:
-Warning	1292	Incorrect datetime value: '0000-00-00'
+Warning	1292	Incorrect datetime value: '0000-00-00 00:00:00'
 FLUSH TABLES;
 SELECT COUNT(*) FROM t1;
 COUNT(*)

mysql-test/t/type_timestamp.test

@@ -493,3 +493,20 @@ set timestamp=0;
 SET time_zone=DEFAULT;
 
 --echo End of 10.0 tests
+
+--echo #
+--echo # Start of 10.1 tests
+--echo #
+
+--echo #
+--echo # MDEV-7831 Bad warning for DATE_ADD(timestamp_column, INTERVAL 10 SECOND) 
+--echo #
+CREATE TABLE t1 (a TIMESTAMP);
+INSERT INTO t1 VALUES ('0000-00-00 00:00:00');
+SELECT DATE_ADD(a, INTERVAL 10 SECOND) FROM t1;
+DROP TABLE t1;
+
+
+--echo #
+--echo # End of 10.1 tests
+--echo #

sql/field.cc

@@ -4842,7 +4842,7 @@ bool Field_timestamp::get_date(MYSQL_TIME *ltime, ulonglong fuzzydate)
   {				      /* Zero time is "000000" */
     if (fuzzydate & TIME_NO_ZERO_DATE)
       return 1;
-    bzero((char*) ltime,sizeof(*ltime));
+    set_zero_time(ltime, MYSQL_TIMESTAMP_DATETIME);
   }
   else
   {