Codeigniter and multiple postgre schema
Here is the solution by the CI Developers. https://github.com/EllisLab/CodeIgniter/commit/485a348a7a633d38f69a963e9f77e23077f75d11
I recommend you to download only the folder 'database' from this link of your CI system/core and add to your application/config/database.php the line...
$db['default']['schema'] = 'NAME_OF_YOUR_SCHEMA';
or if you are using with a array list, something like this:
$db['default'] = array('schema'=>'NAME_OF_YOUR_SCHEMA');