Bug#4261 - mysqldump omits NULLs with --skip-extended-insert

client/mysqldump.c

@@ -1544,6 +1544,8 @@ static void dumpTable(uint numFields, char *table)
 		fputs(ptr, md_result_file);
 	    }
 	  }
+	  else
+            fputs("NULL", md_result_file);
 	}
       }
 

mysql-test/r/mysqldump.result

@@ -141,7 +141,7 @@ INSERT INTO t1 VALUES ("1\""), ("\"2");
 </mysqldump>
 DROP TABLE t1;
 CREATE TABLE t1 (a  VARCHAR(255)) DEFAULT CHARSET koi8r;
-INSERT INTO t1  VALUES (_koi8r x'C1C2C3C4C5');
+INSERT INTO t1  VALUES (_koi8r x'C1C2C3C4C5'), (NULL);
 
 /*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT */;
 /*!40101 SET @OLD_CHARACTER_SET_RESULTS=@@CHARACTER_SET_RESULTS */;
@@ -159,6 +159,7 @@ CREATE TABLE `t1` (
 /*!40000 ALTER TABLE `t1` DISABLE KEYS */;
 LOCK TABLES `t1` WRITE;
 INSERT INTO `t1` VALUES ('абцде');
+INSERT INTO `t1` VALUES (NULL);
 UNLOCK TABLES;
 /*!40000 ALTER TABLE `t1` ENABLE KEYS */;
 

mysql-test/t/mysqldump.test

@@ -73,11 +73,12 @@ DROP TABLE t1;
 
 #
 # Bug #1994
+# Bug #4261
 #
 
 CREATE TABLE t1 (a  VARCHAR(255)) DEFAULT CHARSET koi8r;
-INSERT INTO t1  VALUES (_koi8r x'C1C2C3C4C5');
---exec $MYSQL_DUMP --skip-comments test t1
+INSERT INTO t1  VALUES (_koi8r x'C1C2C3C4C5'), (NULL);
+--exec $MYSQL_DUMP --skip-comments --skip-extended-insert test t1
 DROP TABLE t1;
 
 #