Subject Re: [Firebird-Java] Setting database page size
Author Mark Rotteveel
I am not talking about using the CREATE DATABASE statement, Jaybird uses
the internal API of Firebird.

I think you will need to subclass FBManager and replace the method
createDatabase(...) with code that also adds the
DatabaseParameterBuffer.PAGE_SIZE to the buffer with the correct value.

eg: (set page size to 8192, *UNTESTED*, line to add marked with >>NEW>>)

public void createDatabase (String fileName, String user, String
password)
throws Exception
{
IscDbHandle db = null;
db = gds.createIscDbHandle();
try {
DatabaseParameterBuffer dpb = c.deepCopy();
dpb.addArgument(DatabaseParameterBuffer.USER_NAME, user);
dpb.addArgument(DatabaseParameterBuffer.PASSWORD,
password);
gds.iscAttachDatabase(getConnectString(fileName), db, dpb);

// if forceCreate is set, drop the database correctly
// otherwise exit, database already exists
if (forceCreate)
gds.iscDropDatabase(db);
else {
gds.iscDetachDatabase(db);
return; //database exists, don't wipe it out.
}
} catch (GDSException e) {
// we ignore it
}

db = gds.createIscDbHandle();
try {
DatabaseParameterBuffer dpb = c.deepCopy();
dpb.addArgument(DatabaseParameterBuffer.USER_NAME, user);
dpb.addArgument(DatabaseParameterBuffer.PASSWORD, password);
>>NEW>> dpb.AddArgument(DatabaseParameterBuffer.PAGE_SIZE, 8192);
gds.iscCreateDatabase(getConnectString(fileName), db, dpb);
gds.iscDetachDatabase(db);
}
catch (Exception e) {
if (log!=null)
{
log.error("Exception creating database", e);
}
throw e;
}
}

Alec Swan wrote:
> I know I can specify page size in "create database" statement, but I don't
> understand where in the code to issue this statement when running in
> embedded mode.
>
> On Tue, Aug 18, 2009 at 9:41 AM, Mark Rotteveel <Avalanche1979@...>wrote:
>
>>
>> As far as I can see in the documentation, I don't think you can set the
>> pagesize with FBManager. You probably can do something yourself by
>> duplicating the code used in
>> org.firebirdsql.management.FBManager.createDatabase and add a
>> DatabaseParameterBuffer.PAGE_SIZE to the parameterbuffer (although I am
>> not 100% sure that will work).
>>
>> Mark
>>
>>
>> Alec Swan wrote:
>>> How can I configure the database page size when creating a new database
>>> using FBManager?
>>>
>>> Here is my current code:
>>>
>>> // start embedded Firebird server
>>> FBManager manager = new FBManager("EMBEDDED");
>>> manager.start();
>>> manager.setForceCreate(true);
>>> manager.createDatabase(databaseDbFile.getAbsolutePath(), "", "");

--
Mark Rotteveel