ENGINES table provides
information about storage engines. This is particularly useful for
checking whether a storage engine is supported, or to see what the
default engine is.
ENGINES table has these columns:
The name of the storage engine.
The server's level of support for the storage engine, as shown in the following table.
The engine is supported and is active
YES, plus this is the default engine
The engine is not supported
The engine is supported but has been disabled
A value of
NOmeans that the server was compiled without support for the engine, so it cannot be enabled at runtime.
A value of
DISABLEDoccurs 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 should contain a reason indicating why the option is disabled. See Section 5.4.2, “The Error Log”.
You might also see
DISABLEDfor a storage engine if the server was compiled to support it, but was started with a
--skip-option. For the
DISABLEDmeans the server was compiled with support for NDB Cluster, but was not started with the
All MySQL servers support
MyISAMtables. It is not possible to disable
A brief description of the storage engine.
Whether the storage engine supports transactions.
Whether the storage engine supports XA transactions.
Whether the storage engine supports savepoints.
ENGINESis a nonstandard
Storage engine information is also available from the
SHOW ENGINES statement. See
Section 220.127.116.11, “SHOW ENGINES Statement”. The following statements are
SELECT * FROM INFORMATION_SCHEMA.ENGINES SHOW ENGINES