Thanks Helen for this thorough explanation.
I decided to keep the db running on windows and try to access it from linux.

robert

On 10.05.2016 22:25, Helen Borrie helebor@...
[firebird-support] wrote:

> Hello robert,
>
> Wednesday, May 11, 2016, 3:47:19 AM, you wrote:
>
>> I got a database that was created with a firebird 1.5 on windows.
>> Now I installed Firebird-1.5.2.4731-Win32.exe an a windows 7 and on a
>> windows 10 machine.
>> I copied also the following files into the UDF folder:
>> MD5
>> UdfArithmetic
>> UdfArithmetic.dll
>> UdfControl
>> UdfControl.dll
>> UdfDateTime
>> UdfDateTime.dll
>> UdfString
>> UdfString.dll
> These are custom UDF libraries. They would be 32-bit, as Fb 1.5 did
> not have any 64-bit versions. UDFs must be compiled with the same
> "bitness" as the Firebird that is installed.
>
> Any UDFs (custom ones and those shipped with Firebird) that are
> actually required for use with your database are declared in the
> system table RDB$FUNCTIONS and the argument descriptors in
> RDB$FUNCTION_ARGUMENTS.
>
> I guess that the files without the ".dll" suffix would be text files
> containing the declarations for the database.
>
>> after some fiddling (I am new to firebird, and mostly working on linux)
>> I could connect to the database.
>> Now I would like to use this databse under linux using firebird version 2.5
>> However the connection can not be established:
>> Use CONNECT or CREATE DATABASE to specify a database
> SQL>> connect "localhost:/home/robert/hermes/AFBS/VAS/VAS.fdb" user
>> 'SYSDBA' password 'xxx';
>> Statement failed, SQLSTATE = 08006
>> Unable to complete network request to host "localhost".
> There is likely to be more than one reason why you can't connect to
> that database. Have you tried connecting to the sample database
> EMPLOYEE.FDB? Try that as a reality check. There is an alias for it
> in the default aliases.conf, so your connection path would be
> localhost:employee
>
> That said, if the database has declarations for those custom UDFs, you
> won't be able to connect, anyway, since the engine cannot find
> libraries that don't exist. And any declarations for the native
> UDFs would need to be dropped and recreated to point to the correct
> ENTRY_POINT on Linux. (You can get the details from the Fb 2.5
> Language Reference at the web site.)
>
>
>> now my questions:
>> do I need to load linux verions of the UDFs
> As you have probably figured out already, you need to compile your
> custom libraries on Linux, with the correct "bitness" to match the
> Firebird engine version. It might not be straightforward, as
> third-party libraries are notorious for having platform-specific
> dependencies.
>
> Perhaps a better strategy would be to analyse what each of your custom
> functions is meant to do and replace those calls with an internal
> (built-in) function. Between Fb 1.5 (2003) and Fb 2.5 a large number
> of built-in functions have been added.
>
>> how would I load this database under linux. do i need to convert it.
> The platform is not necessarily an issue, if the Windows and Linux
> environments are hardware-compatible and bitness-compatible. It is
> rather a question of the on-disk structure (ODS) of the database. The
> gbak tool (in the /bin/ directory) is used to upgrade the ODS.
>
> [Not forgetting those UDF declarations! You would have to drop them
> before attempting the migration.]
>
> Make a gbak backup (see docs on-line) of the database on Windows under the Fb
> 1.5 server. Copy that backup file over to the Linux machine and
> restore it using gbak -restore or -create under the new Fb version.
> You will need to study the -fix* switches in the gbak documentation,
> to fix the metadata and, if you have non-ascii data, the data. This
> may be simple or not-so-simple, depending on what character set was
> used to store the data.
>
> Whatever you do, keep safe backups of the database and work only with
> a good supply of copies that you don't mind trashing!
>
> Helen
>
>
>
> ------------------------------------
> Posted by: Helen Borrie <helebor@...>
> ------------------------------------
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