The following system properties are no longer supported:, h2.allowBigDecimalExtensions, h2.emptyPassword, h2.minColumnNameMap, h2.returnLobObjects, h2.webMaxValueLength.

New experimental system property "h2.modifyOnWrite": when enabled, the database file is only modified when writing to the database. This should speed up the serialized file lock.

The syntax for CREATE TABLE ... AS SELECT ... has been changed: options such as NOT PERSISTENT are now before the query (AS SELECT), because otherwise they might be interpreted as a part of the query.

There is a problem when opening a database file in a timezone that has different daylight saving rules.

This database no longer uses finalize() except for temporary files. The system property "h2.runFinalize" is no longer supported. Unclosed connections are still detected, but the opening stack trace is now collected only if connections are not closed repeatedly (starting with the second unclosed connection).