Ronald Bradford and Giuseppe Maxia (hey guys!) wrote about different ways to ignore a database when using mysqldump –all-databases over the past couple of days.
Whilst the solutions are interesting, I wondered why not attack it from the proper approach, and add the option to mysqldump itself? Honestly, the patch is trivial, and doing anything against INFORMATION_SCHEMA with lots of databases and tables … well let’s just say … group_concat_max_len is the least of your worries..
15 minutes later I had a working solution:
To my surprise, I also found Bug#3228, created a little over 8 years ago.. I’ve posted the patch to the bug. It acts in exactly the same way as the –ignore-table option (specify it multiple times to ignore multiple databases, passing in only the database name for each).
Here’s my little test:
$ mysql -u root -pmysql -h 127.0.0.1 -P 3307 -e "show databases"; +--------------------+ | DATABASE | +--------------------+ | information_schema | | admin | | mem__inventory | | mysql | | performance_schema | | test | +--------------------+ $ ./mysqldump -u root -pmysql -h 127.0.0.1 -P 3307 --all-databases --ignore-database=mysql --ignore-database=mem__inventory Warning: USING a password ON the command line interface can be insecure. -- MySQL dump 10.13 Distrib 5.6.6-m9, for Win32 (x86) -- -- Host: 127.0.0.1 Database: -- ------------------------------------------------------ -- Server version 5.6.5-m8 /*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT */; /*!40101 SET @OLD_CHARACTER_SET_RESULTS=@@CHARACTER_SET_RESULTS */; /*!40101 SET @OLD_COLLATION_CONNECTION=@@COLLATION_CONNECTION */; /*!40101 SET NAMES utf8 */; /*!40103 SET @OLD_TIME_ZONE=@@TIME_ZONE */; /*!40103 SET TIME_ZONE='+00:00' */; /*!40014 SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0 */; /*!40014 SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0 */; /*!40101 SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE='NO_AUTO_VALUE_ON_ZERO' */; /*!40111 SET @OLD_SQL_NOTES=@@SQL_NOTES, SQL_NOTES=0 */; -- -- Current Database: `admin` -- CREATE DATABASE /*!32312 IF NOT EXISTS*/ `admin` /*!40100 DEFAULT CHARACTER SET latin1 */; USE `admin`; -- -- Current Database: `test` -- CREATE DATABASE /*!32312 IF NOT EXISTS*/ `test` /*!40100 DEFAULT CHARACTER SET latin1 */; USE `test`; -- -- Table structure for table `t1` -- DROP TABLE IF EXISTS `t1`; /*!40101 SET @saved_cs_client = @@character_set_client */; /*!40101 SET character_set_client = utf8 */; CREATE TABLE `t1` ( `i` BINARY(16) NOT NULL, `k` bigint(20) DEFAULT NULL, PRIMARY KEY (`i`) ) ENGINE=InnoDB DEFAULT CHARSET=latin1; /*!40101 SET character_set_client = @saved_cs_client */; -- -- Dumping data for table `t1` -- LOCK TABLES `t1` WRITE; /*!40000 ALTER TABLE `t1` DISABLE KEYS */; /*!40000 ALTER TABLE `t1` ENABLE KEYS */; UNLOCK TABLES; /*!40103 SET TIME_ZONE=@OLD_TIME_ZONE */; /*!40101 SET SQL_MODE=@OLD_SQL_MODE */; /*!40014 SET FOREIGN_KEY_CHECKS=@OLD_FOREIGN_KEY_CHECKS */; /*!40014 SET UNIQUE_CHECKS=@OLD_UNIQUE_CHECKS */; /*!40101 SET CHARACTER_SET_CLIENT=@OLD_CHARACTER_SET_CLIENT */; /*!40101 SET CHARACTER_SET_RESULTS=@OLD_CHARACTER_SET_RESULTS */; /*!40101 SET COLLATION_CONNECTION=@OLD_COLLATION_CONNECTION */; /*!40111 SET SQL_NOTES=@OLD_SQL_NOTES */; -- Dump completed on 2012-04-19 22:55:02
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