After over 1.5 years of development (since 29/11, 2005), plus number of developers contribution, and help of Drupal 6.x schema API, a new Oracle driver for Drupal 6.x is now ready for testing.
The latest version of Oracle driver overcome a lot of Oracle-specific limitation, and able to work well as like as existing Drupal database driver, e.g. MySQL and PgSQL. On the other hand, according to a simple stress test result, Oracle driver is able to keep similar performance as like as other drivers.
Special features include: isolated LOBs value handling (require additional LOBs patch to Drupal 6.x), overcome limitation in table/column/constraint naming with maximum 30 characters, rewrite table/column/constraint name if it is Oracle-specific reserved word, overcome PHP5 OCI8 oci_num_rows() bug on SELECT query, etc. On the other hand, according to number of other Drupal 6.x core patches, most core queries are now Oracle friendly. The above features will also benefit in others database driver implementation.