This guide discusses migration to Hibernate ORM version 6.5. For migration from earlier versions, see any other pertinent migration guides as well.
6.5 adds support for marshalling Java Time objects directly through the JDBC driver as defined by JDBC 4.2.
In previous versions, Hibernate would handle Java Time objects using java.sql.Date, java.sql.Time or
java.sql.Timestamp references as intermediate forms.
Another behavioral change with this is handling for timezones. OffsetDateTime, OffsetTime and
ZonedDateTime all encode explicit timezone information. With direct marshalling, Hibernate simply
passes along the value as-is. In the legacy behavior, since the java.sql variants do not
encode timezone information, Hibernate generally has to specially handle timezones when converting to
those intermediate forms.
For 6.5 this behavior is disabled by default. To opt-in,
hibernate.type.prefer_java_type_jdbc_types=falseIt is expected the default will flip for 7.0.