Using SQLJ 8.1.6 translator with no customization

SQLJ is very interesting because of the possibility of interop AND including vendor customizations. However, it seems that, except for Oracle Corp, no one has written a customizer. IBM, Sybase, and Informix all claim to support SQLJ, but, as far as I can see, they are all using the reference implementation and only Oracle has provided extensions and a customizer!
I'm trying to use generic code as a proof of concept, and add in the Oracle enhancements in "stage 2".
According to the Oracle SQLJ programmer's guide, the OraCustomerizer class is used as the default. This requires that OraCustomizer class and JDBC driver is needed to deploy on any platform when using a customized .ser file.
Four questions:
1. Is it possible to turn off the customizer (-P-customizer=NULL for example ?) and still use the 8.1.6 translator? The only alternative is to revert to the reference impl. translator.
2. Why is Oracle JDBC driver required if Oracle customizations are present in .ser file? I can see the need for OraCustomizer, but why the driver?
3. If deploying an app with an .ser file that includes Oracle customization on, for example, a DB2 system, what is the most lightweight way to include OraCustomizer and JDBC? Currently, I'm appending both entire .jar files to the end of the classpath.
4. Is anyone else writing a customizer other than the 3 that are included in 8.1.6?
BTW, the programmer's guide (and the SQLJ concept) is excellent! I'm looking forward to the enhancements in 8i version 3.
Thanks in advance,
Bob Beauchemin
[email protected]
null

1. Yes, you can turn off profile customization, or set a different default profile customizer.
-profile=false - turns off customization
-default-customizer=classname -sets the default customizer. If classname is empty this in fact turns off customization.
2. If an Oracle customization exists, and the statement is executed on an Oracle connection then we enable Oracle-specific types and other enhancements. We use Java reflection to link to particular Oracle JDBC driver present.
If the connection is not an Oracle connection, then we just use the JDBC-generic runtime.
The OracleCustomization of the .ser file adds information to the existing profile. I do not believe that this information uses Oracle JDBC-driver-specific classes (I have not verified this, though). Thus you should not need an Oracle JDBC driver in your application, even if you performed the Oracle customization.
3. You could create an application that is customized for all target platforms (customizations are additive) and distribute it as-is.
Alternatively, you can create the application without customization and then individually customize for each platform. This will be more work but your application (that is, your .ser files) should be slightly smaller.
4. IBM and Informix provide versions of SQLJ, AFAIK. I do not know if Informix has a customizer. (IBM does, as you have discovered.)
5. The next release of Oracle SQLJ (8.1.7) will support the SQLJ ISO standard, which is based on JDBC 2.0. This results in an incompatibility between SQLJ customizers/customizations from the ANSI specification (such as the current Oracle and IBM customizers) and from ISO. Thus, if you want to plug and play customizers you may be restricted to using SQLJ 8.1.6 for the time being.

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