=head1 UPGRADING FROM 3.8.8 AND EARLIER

Previous versions of RT used a password hashing scheme which was too easy to
reverse, which could allow attackers with read access to the RT database to
possibly compromise users' passwords.  Even if RT does no password
authentication itself, it may still store these weak password hashes -- using
ExternalAuth does not guarantee that you are not vulnerable!  To upgrade
stored passwords to a stronger hash, run:

    perl etc/upgrade/vulnerable-passwords

We have also proved that it's possible to delete a notable set of records from
Transactions table without losing functionality. To delete these records, run
the following script:

    perl -I /opt/rt4/local/lib -I /opt/rt4/lib etc/upgrade/shrink_transactions_table.pl

If you chose not to run the shrink_cgm_table.pl script when you upgraded to
3.8, you should read more about it below and run it at this point.

The default for $MessageBoxWrap is now SOFT and $MessageBoxWidth is now unset
by default.  This means the message box will expand to fill all the available
width.  $MessageBoxWrap is also overridable by the user now.  These changes
accommodate the new default two column layout for ticket create and update
pages.  You may turn this layout off by setting $UseSideBySideLayout to 0.  To
retain the original behavior, set $MessageBoxWrap to HARD and $MessageBoxWidth
to 72.


=head1 UPGRADING FROM 3.8.7 AND EARLIER

RT's ChartFont option has been changed from a string to a hash which lets you
specify per-language fonts. RT now comes with a better default font for
charts, too.  You should either update your 'ChartFont' option to match the
new format, or consider trying the new default.

RT now gives you more precise control over the order in which custom fields
are displayed.  This change requires some small changes to your currently
saved custom field orders.  RT will automatically clean up your existing
custom fields when you run the standard database upgrade steps.  After that
cleanup, you should make sure that custom fields are ordered in a way that you
and your users find pleasing.


=head1 UPGRADING FROM 3.8.6 AND EARLIER

For MySQL and Oracle users: if you upgraded from a version of RT earlier than
3.7.81, you should already have a CachedGroupMembers3 index on your
CachedGroupMembers table.  If you did a clean install of RT somewhere in the
3.8 release series, you most likely don't have this index.  You can add it
manually with:

  CREATE INDEX CachedGroupMembers3 on CachedGroupMembers (MemberId, ImmediateParentId);


=head1 UPGRADING FROM 3.8.5 AND EARLIER

You can now forward an entire Ticket history (in addition to specific
transactions) but this requires a new Template called "Forward Ticket".  This
template will be added as part of the standard database upgrade step.

Custom fields with categories can optionally be split out into hierarchical
custom fields.  If you wish to convert your old category-based custom fields,
run:

    perl etc/upgrade/split-out-cf-categories

It will prompt you for each custom field with categories that it finds, and
the name of the custom field to create to store the categories.

If you were using the LocalizedDateTime RT::Date formatter from custom code,
and passing a DateFormat or TimeFormat argument, you need to switch from the
strftime methods to the cldr methods; that is,
'full_date_format' becomes 'date_format_full'.

You may also have done this from your RT_SiteConfig.pm, using:

    Set($DateTimeFormat, {
        Format => 'LocalizedDateTime',
        DateFormat => 'medium_date_format',
    );

Which would need to be changed to:

    Set($DateTimeFormat, {
        Format => 'LocalizedDateTime',
        DateFormat => 'date_format_medium',
    );


=head1 UPGRADING FROM 3.8.3 AND EARLIER

Arguments to the NotifyGroup Scrip Action will be updated as part of the
standard database upgrade process.


=head1 UPGRADING FROM 3.8.2 AND EARLIER

A new scrip condition, 'On Reject', has been added.


=head1 UPGRADING FROM 3.8.1 AND EARLIER

When using Oracle, $DatabaseName is now used as SID, so RT can connect without
environment variables or tnsnames.ora file. Because of this change, your RT
instance may loose its ability to connect to your DB; to resolve this, you
will need to update RT's configuration and restart your web server.  Example
configuration:

    Set($DatabaseType, 'Oracle');
    Set($DatabaseHost, '192.168.0.1');
    # undefined port => will try both 1526 and 1521
    Set($DatabasePort, undef);
    # ORACLE SID
    Set($DatabaseName, 'XE');
    # user for RT in Oracle, RT's tables in his schema
    Set($DatabaseUser, 'test');
    # above user's password
    Set($DatabasePassword, 'test');

If you want a user to be able to access the Approvals tools (a.k.a.  the
Approvals tab), you must grant that user the "ShowApprovalsTab" right.


=head1 UPGRADING FROM 3.8.0 AND EARLIER

The TicketSQL syntax for bookmarked tickets has been changed.  Specifically,
the new phrasing is "id = '__Bookmarked__'", rather than the old
"__Bookmarks__".  The old form will remain, for backwards compatibility.  The
standard database upgrade process will only automatically change the
global 'Bookmarked Tickets' search


=head1 UPGRADING FROM 3.7.85 AND EARLIER

We have proved that it is possible to delete a large set of records from the
CachedGroupMembers table without losing functionality; in fact, failing to do
so may result in occasional problems where RT miscounts users, particularly in
the chart functionality.  To delete these records run the following script:

    perl -I /opt/rt4/local/lib -I /opt/rt4/lib etc/upgrade/shrink_cgm_table.pl

After you run this, you will have significantly reduced the number of records
in your CachedGroupMembers table, and may need to tell your database to
refresh indexes/statistics.  Please consult your DBA for specific instructions
for your database.


=head1 UPGRADING FROM 3.7.81 AND EARLIER

RT::Extension::BrandedQueues has been integrated into core, and the handling
of subject tags has changed as a consequence.  You will need to modify any of
your email templates which use the $rtname variable, in order to make them
respect the per-queue subject tags. To edit your templates, log into RT as
your administrative user, then click:

    Configuration -> Global -> Templates -> Select -> <Some template name>

The only template which ships with RT which needs updating is the "Autoreply"
template, which includes this line:

    "There is no need to reply to this message right now.  Your ticket has
    been assigned an ID of [{$rtname} #{$Ticket->id()}]."

Change this line to read:

    "There is no need to reply to this message right now.  Your ticket has
    been assigned an ID of { $Ticket->SubjectTag }."

If you were previously using RT::Extension::BrandedQueues, you MUST uninstall
it before upgrading.

RT::Action::LinearEscalate extension has been integrated into core, so you
MUST uninstall it before upgrading.

RT::Extension::iCal has been integrated into core, so you MUST uninstall it
before upgrading. In addition, you must run etc/upgrade/3.8-ical-extension
script to convert old data.


=head1 UPGRADING FROM 3.7.80 AND EARLIER

Added indexes to CachedGroupMembers for MySQL and Oracle.  If you have
previously installed RTx-Shredder, you may already have these indexes.  You
can see the indexes by looking at etc/upgrade/3.7.81/schema.*

These indexes may take a very long time to create.