As of MariaDB 10.2 the DATETIME data type supports sub-second fractions. The default of MariaDB internally is to use no fractions. The number of fractions can be explicitly set via scale: @Column(scale=6) will lead to a DATETIME(6) column and able to store microseconds. A value of @Column(scale=-1) will explicitly turn off all fractions.

As of MariaDB 10.7 the UUID data type is supported, but the JDBC driver does not writes the object directly, so UUID field support is made through UUID to String conversion.