Jaybird and Firebird 3.0 Alpha 1

The first alpha version of Firebird 3 was just released, see "Firebird 3.0 Alpha 1 release is available for testing". This article describes how to use Firebird 3.0 (alpha 1) with Jaybird 2.2.x and earlier.

Authentication

Firebird 3 introduces a new authentication mechanism, combined with wire protocol encryption. This new authentication mechanism (SRP) is not supported by Jaybird 2.2.x and earlier when you use the pure java wire protocol (the default). We plan to provide support in the upcoming Jaybird 2.3 release (which might get renamed to Jaybird 3.0).

Pure Java authentication

For the pure java wire protocol to authenticate to Firebird 3 you need to enable legacy authentication and correctly setup your users.

Setting up legacy authentication for Firebird 3 requires modifying the firebird.conf by adding (or modifying) the line with AuthServer = :

AuthServer = Srp, Win_Sspi, Legacy_Auth

Restart the Firebird service after you have saved the file.

The option Srp is the default new authentication, Win_Sspi is for the trusted Windows authentication, and Legacy_Auth enables the legacy authentication mechanism of Firebird 2.5 and earlier.

By default users created through the services API, gsec or another way will be setup for Srp, these users don’t exist for the legacy authentication and trying to authenticate will result in the Exception: org.firebirdsql.jdbc.FBSQLException: GDS Exception. 335544472. Your user name and password are not defined. Ask your database administrator to set up a Firebird login.

To setup a user for the legacy authentication, you need to change the UserManager in the firebird.conf to:

UserManager = Legacy_UserManager

The default value is UserManager = Srp. You don’t need to restart the Firebird service after changing this if you are going to use gsec (TODO: Also for services API?).

Next you need to create the user (even if it already exists for Srp), for example to create a user jaybird with password jdbc:

> gsec -user sysdba -password masterkey
GSEC> add jaybird -pw jdbc

After doing this you should be able to connect to Firebird 3 with Jaybird 2.2.3. I’d suggest to revert the UserManager setting in firebird.conf to its default after you have set up the users.

Type 2 (native) authentication

(TODO: Test if jdbc:firebirdsql:native does work)

Datatypes

Firebird 3 introduces a few new datatypes.

Boolean

Firebird 3 adds the BOOLEAN datatype (sqltype 32764/32765). This datatype is currently not supported by Jaybird. A snapshot version of 2.2.4 with BOOLEAN support is available for testing. See snapshot for more information.

In Jaybird 2.2.3 and earlier, using boolean values (in select, insert, etc) of this types will yield the following exception:

Exception in thread "main" org.firebirdsql.jdbc.field.TypeConversionException: SQL type for this field is not yet supported.
	at org.firebirdsql.jdbc.field.FBField.createException(FBField.java:186)
	at org.firebirdsql.jdbc.field.FBField.createField(FBField.java:468)
	at org.firebirdsql.jdbc.field.FBField.createField(FBField.java:379)
	at org.firebirdsql.jdbc.AbstractResultSet.prepareVars(AbstractResultSet.java:200)
	at org.firebirdsql.jdbc.AbstractResultSet.<init>(AbstractResultSet.java:144)
	at org.firebirdsql.jdbc.FBResultSet.<init>(FBResultSet.java:46)
	at org.firebirdsql.jdbc.AbstractStatement.getResultSet(AbstractStatement.java:913)
	at org.firebirdsql.jdbc.AbstractStatement.getResultSet(AbstractStatement.java:894)
	at org.firebirdsql.jdbc.AbstractStatement.executeQuery(AbstractStatement.java:225)

A workaround is to wrap the field in an IIF (or CASE):

SELECT IIF(boolvalue, 1, 0) AS boolvalue FROM booltable

Or for insert, use an expression with a boolean result in the value list:

INSERT INTO booltable(id, boolvalue) VALUES (?, 1 = ?)

This works because the second parameter will be identified as an integer, and when you use setBoolean() on the PreparedStatement, it will use 1 for true and 0 for false.

Identity type

Firebird 3.0 introduces an autoincrement field (<datatype> GENERATED BY DEFAULT AS IDENTITY). Jaybird 2.2.x does not have identity support, in other words it will be handled like any other <datatype> NOT NULL field. For example in DatabaseMetaData.getColumns() will not report YES for the column IS_AUTOINCREMENT (instead it reports empty string, meaning “it cannot be determined whether the column is auto incremented”).

Other operations, including retrieving generated keys, will work for this column, just as it works for normal columns.

Other issues

Client info

Contrary to Firebird 2.5 and earlier, the value set using Connection.setClientInfo(String, String) is padded with spaces. This is a bug in Firebird 3.0 alpha 1. See CORE-4156

Updatable ResultSet

In CONCUR_UPDATABLE ResultSets, the use of updateRow() and refreshRow() for queries to tables without a primary key doesn’t work. No update is performed and the refresh throws an SQLException “No rows could be fetched.”. Jaybird uses the RDB$DB_KEY in these situations. This issue is still under investigation.

 
tip/firebird30a1.txt · Last modified: 2013/08/10 18:39 by mrotteveel