SHOW ENGINES Syntax

SHOW ENGINES displays status information about the server's storage engines. This is particularly useful for checking whether a storage engine is supported, or to see what the default engine is.

mysql> SHOW ENGINES\G
*************************** 1. row ***************************
 Engine: MEMORY
 Support: YES
 Comment: Hash based, stored in memory, useful for temporary tables Transactions: NO
 XA: NO
 Savepoints: NO
*************************** 2. row ***************************
 Engine: MyISAM
 Support: DEFAULT
 Comment: Default engine as of MariaDB 3.23 with great performance Transactions: NO
 XA: NO
 Savepoints: NO
*************************** 3. row ***************************
 Engine: InnoDB
 Support: YES
 Comment: Supports transactions, row-level locking, and foreign keys Transactions: YES
 XA: YES
 Savepoints: YES
*************************** 4. row ***************************
 Engine: EXAMPLE
 Support: YES
 Comment: Example storage engine Transactions: NO
 XA: NO
 Savepoints: NO
*************************** 5. row ***************************
 Engine: ARCHIVE
 Support: YES
 Comment: Archive storage engine Transactions: NO
 XA: NO
 Savepoints: NO
*************************** 6. row ***************************
 Engine: CSV
 Support: YES
 Comment: CSV storage engine Transactions: NO
 XA: NO
 Savepoints: NO
*************************** 7. row ***************************
 Engine: BLACKHOLE
 Support: YES
 Comment: /dev/null storage engine (anything you write »
 to it disappears)
Transactions: NO
 XA: NO
 Savepoints: NO
*************************** 8. row ***************************
 Engine: FEDERATED
 Support: YES
 Comment: Federated MariaDB storage engine Transactions: NO
 XA: NO
 Savepoints: NO
*************************** 9. row ***************************
 Engine: MRG_MYISAM
 Support: YES
 Comment: Collection of identical MyISAM tables Transactions: NO
 XA: NO
 Savepoints: NO

The output from SHOW ENGINES may vary according to the MariaDB version used and other factors. The values shown in the Support column indicate the server's level of support for the storage engine, as shown in the following table.

Value	Meaning
YES	The engine is supported and is active
DEFAULT	Like YES, plus this is the default engine
NO	The engine is not supported
DISABLED	The engine is supported but has been disabled

A value of NO means that the server was compiled without support for the engine, so it cannot be enabled at runtime.

A value of DISABLED occurs either because the server was started with an option that disables the engine, or because not all options required to enable it were given. In the latter case, the error log file should contain a reason indicating why the option is disabled. See , "The Error Log".

You might also see DISABLED for a storage engine if the server was compiled to support it, but was started with a --skip-engine_name option.

All MariaDB servers support MyISAM tables, because MyISAM is the default storage engine. It is not possible to disable MyISAM.

The Transactions, XA, and Savepoints columns indicate whether the storage engine supports transactions, XA transactions, and savepoints, respectively.

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