Enable true oci_bind_by_name funciton

[eluser]Unknown[/eluser]
CodeIgniter's oci8_dirver is not a great implementation for an oracle driver.
I had to make several changes to it in order to get it to do some advanced use of oracle capabilities. On my custom version I included "true" bind variables support while keeping the "escaped" bind variables implemented by CodeIgniter.
Another issue is with function oci_set_prefetch which value is fixed and hardcoded.
There is any way to contribute these changes so the oci8_driver can be improved in future versions?