MySQL 9.3 Reference Manual Including MySQL NDB Cluster 9.3
The 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.
The ENGINES table has these columns:
ENGINE
The name of the storage engine.
SUPPORT
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 should contain a
reason indicating why the option is disabled. See
Section 7.4.2, “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-
option. For the engine_nameNDB storage
engine, DISABLED means the server was
compiled with support for NDB Cluster, but was not started
with the --ndbcluster option.
All MySQL servers support MyISAM tables. It
is not possible to disable MyISAM.
COMMENT
A brief description of the storage engine.
TRANSACTIONS
Whether the storage engine supports transactions.
XA
Whether the storage engine supports XA transactions.
SAVEPOINTS
Whether the storage engine supports savepoints.
ENGINES is a nonstandard
INFORMATION_SCHEMA table.
Storage engine information is also available from the
SHOW ENGINES statement. See
Section 15.7.7.18, “SHOW ENGINES Statement”. The following statements are
equivalent:
SELECT * FROM INFORMATION_SCHEMA.ENGINES SHOW ENGINES