Next versions of Oracle enhanced adapter 1.9 and "nextval" 2.0 for Rails 5.2

[Yasuo Honda]

Hi,

I'm going to announce the Oracle enhanced adapter release plan for Rails 5.2. 

Releasing two versions of Oracle enhanced adapter 1.9 and "nextval" 2.0.

## Oracle enhanced adapter 1.9

* This will just support Rails 5.2

* No big changes planned

## Oracle enhanced adapter "nextval" 2.0

Planned new features and changes:

* Support Oracle Database 12c Release 2 or higher version only 

* Introduce `identity` datatype like auto_increment in MySQL to replace sequence based primary key support

* Longer identifier (128 byte) support

* Drop support for Oracle Database 12c Release 1 or lower versions of Oracle 

* Drop database link support to be replaced by Rails 3-level database configurations to allow multiple database connections

* Drop trigger based primary key support

* Drop sequence based primary key support 

Current plan is releasing two versions of Oracle enhanced adapter 1.9 and "nextval" 2.0 both of which will support Rails 5.2. 

But this is a migration plan. At some point (the earliest one is Rails 5.3 or 6.0) Oracle enhanced adapter 2.0 or newer version will be developed.

Thanks,

--

Yasuo Honda