Does Mysqldump include indexes?

Does Mysqldump include indexes?

No, it does not export indexes. Indexes are rebuilt upon loading the mysqldump back into mysql.

What is Mysqldump in MySQL?

Mysqldump is a command-line utility that is used to generate the logical backup of the MySQL database. It produces the SQL Statements that can be used to recreate the database objects and data. The command can also be used to generate the output in the XML, delimited text, or CSV format.

Is Mysqldump safe?

MySQL’s unencrypted port is not secure. If you’re running mysqldump on your VPS host, and only transferring the resulting dump file to your PC, then you can do this securely. If you can ssh to your VPS, you should be able to use scp too. This gives you the ability to transfer files securely.

What is Mysqldump single transaction?

Mysqldump with Transactions The –single-transaction flag will start a transaction before running. Rather than lock the entire database, this will let mysqldump read the database in the current state at the time of the transaction, making for a consistent data dump.

What Cannot have a trigger associated with it?

Since triggers execute as part of a transaction, the following statements are not allowed in a trigger: All create commands, including create database, create table, create index, create procedure, create default, create rule, create trigger, and create view. All drop commands. alter table and alter database.

What is tablespace in MySQL?

The system tablespace is the storage area for the InnoDB data dictionary, the doublewrite buffer, the change buffer, and undo logs. It may also contain table and index data if tables are created in the system tablespace rather than file-per-table tablespaces. The system tablespace can have one or more data files.

How do you dump a database?

To dump/export a MySQL database, execute the following command in the Windows command prompt: mysqldump -u username -p dbname > filename. sql . After entering that command you will be prompted for your password.

Does Mysqldump lock the database?

By default, the mysqldump utility, which allows to back a MySQL database, will perform a lock on all tables until the backup is complete. You can use the Mysqldump utility with a specific flag, –single-transaction, which will allow you to backup your database tables without locking them.

Should I stop MySQL before Mysqldump?

The shell sleep command is just to make sure that the background task running the mysql locking command is executed before the mysqldump starts. You could reduce it to 1 second and it should still be fine.

What is the difference between InnoDB and MyISAM?

Here are a few of the major differences between InnoDB and MyISAM: InnoDB has row-level locking. MyISAM only has full table-level locking. InnoDB has what is called referential integrity which involves supporting foreign keys (RDBMS) and relationship constraints, MyISAM does not (DMBS).

Can not have a trigger associated with it MySQL?

MySQL trigger limitations MySQL triggers cannot: Use SHOW , LOAD DATA , LOAD TABLE , BACKUP DATABASE, RESTORE , FLUSH and RETURN statements. Use statements that commit or rollback implicitly or explicitly such as COMMIT , ROLLBACK , START TRANSACTION , LOCK/UNLOCK TABLES , ALTER , CREATE , DROP , RENAME.

Can triggers be enabled or disabled?

Triggers can be re-enabled by using ENABLE TRIGGER. DML triggers defined on tables can be also be disabled or enabled by using ALTER TABLE. Changing the trigger by using the ALTER TRIGGER statement enables the trigger.

When to use alter privilege in mysqldump?

mysqldump output can include ALTER DATABASE statements that change the database collation. These may be used when dumping stored programs to preserve their character encodings. To reload a dump file containing such statements, the ALTER privilege for the affected database is required.

What kind of output can I get from mysqldump?

The mysqldump command can also generate output in CSV, other delimited text, or XML format.

How to dump entire databases in MySQL 8.0?

To dump entire databases, do not name any tables following db_name, or use the –databases or –all-databases option. To see a list of the options your version of mysqldump supports, issue the command mysqldump –help .

When to use alter database statement in mysqldump?

mysqldump output can include ALTER DATABASE statements that change the database collation. These may be used when dumping stored programs to preserve their character encodings. To reload a dump file containing such statements, the ALTER privilege for the affected database is required.