Re: [Firebird-devel] Firebird 4 and ODS 12

[Alex Peshkoff via Firebird-devel]

On 31.05.2019 12:09, Emil Totev wrote:

On Fri, 31 May 2019 at 11:49, <firebird-devel-requ...@lists.sourceforge.net <mailto:firebird-devel-requ...@lists.sourceforge.net>> wrote:

    On 30.05.2019 18:09, Emil Totev wrote:
    > I wonder would it be possible to make Firebird 4 work with ODS 12
    > (Firebird 3) databases?
    >
    > Before Firebird 3 it was relatively easy to upgrade your Firebird
    > server - your databases could stay in the old ODS and be
    upgraded one
    > by one, and it was easier to go back in case of incompatibilities.
    > But when you upgrade the server to Firebird 3, you have to
    upgrade all
    > its databases to the new ODS at the same time, and it is much
    harder
    > to go back. I believe this holds the upgrade to Firebird 3 for
    many of
    > us.
    >
    > Now with Firebird 4 the situation seems the same. I was hoping
    the new
    > plugin architecture could help with this, so I copied an
    engine12.dll
    > to the plugins directory of Firebird 4 beta, and added two lines in
    > the respective databases.conf entry for the ODS 12 database:
    > ? ? ?Providers = Engine12
    > ? ? ?SecurityDatabase = $(dir_secDb)/security4.fdb
    > This made it possible to connect to the database, but every
    attempt to
    > execute a statement ended up with 'Interface IStatement version too
    > old: expected 4, found 3'.
    >
    > Would it be very difficult to provide version 4 compatible
    engine12.dll?

    Yes, we will ensure that engine12 works with FB4. That's great
    that you
    have made this test, please register appropriate bug in the tracker.

Are you planning to provide the compatible engine12.dll as part of Firebird 4, or in the next point release of Firebird 3?

In the point release or snapshot build.

I had to add the second line with Security Database, because I got 'Missing security context' without it. I don't think this should be necessary.

Yes, one more bug.

And I think it should be possible to use security3.fdb as well, with the proper provider in the definition.

Also to be fixed.




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