MySQL 8.0 Release Notes
MySQL 8.0 Source Code Documentation
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:
ENGINEThe name of the storage engine.
SUPPORTThe server's level of support for the storage engine, as shown in the following table.
Value Meaning YESThe engine is supported and is active DEFAULTLike YES, plus this is the default engineNOThe engine is not supported DISABLEDThe 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 theengine_nameNDBstorage engine,DISABLEDmeans the server was compiled with support for NDB Cluster, but was not started with the--ndbclusteroption.All MySQL servers support
MyISAMtables. It is not possible to disableMyISAM.COMMENTA brief description of the storage engine.
TRANSACTIONSWhether the storage engine supports transactions.
XAWhether the storage engine supports XA transactions.
SAVEPOINTSWhether the storage engine supports savepoints.
Notes
The
ENGINEStable is a nonstandardINFORMATION_SCHEMAtable.
Storage engine information is also available from the
SHOW ENGINES statement. See
Section 13.7.6.16, “SHOW ENGINES Syntax”. The following statements are
equivalent:
SELECT * FROM INFORMATION_SCHEMA.ENGINES
SHOW ENGINES