Cx-oracle

This release addresses a number of issues. See the [release notes](http://cx-oracle.readthedocs.io/en/latest/releasenotes.html#version-6-3-1-may-2018) for more information.

This release addresses a number of issues and bug fixes. The changes needed to support DML Returning with cursor.executemany() required a new point release since the attribute dml_ret_array_val in the [cx_Oracle.\_\_future\_\_](http://cx-oracle.readthedocs.io/en/latest/module.html#cx_Oracle.__future__) object needs to be set in order for it to work correctly. Setting it changes the behavior for DML Returning statements with cursor.execute() as well and will become the new behavior in cx_Oracle 7. See the [release notes](http://cx-oracle.readthedocs.io/en/latest/releasenotes.html#version-6-3-april-2018) for more information.

This release corrects a packaging issue. See the [release notes](http://cx-oracle.readthedocs.io/en/latest/releasenotes.html#version-6-2-1-march-2018).

This release eliminates the error "DPI-1054: connection cannot be closed when open statements or LOBs exist". It also adds support for creating temporary LOBs and binding LOBs directly to a cursor. You can now also use a connection as a context manager to close the connection at the end of the block by using the new [`cx_Oracle.__future__` object](http://cx-oracle.readthedocs.io/en/latest/module.html#cx_Oracle.__future__). This will become the default and only behaviour of using a connection as a context manager unless an issue is raised requesting the original behaviour to be retained. The code was reorganised and simplified in order to streamline further maintenance and a number of bugs were fixed. See the [full release notes](http://cx-oracle.readthedocs.io/en/latest/releasenotes.html#version-6-2-march-2018) for more information.

This release has a number of small enhancements intended to build upon the release of 6.0 made a few months ago. Topping the list is support for accessing sharded databases, a new feature in Oracle Database 12.2. Support for creating connections using the SYSBACKUP, SYSDG, SYDKM and SYSRAC roles was also added, as was support for identifying the id of the transaction which spawned a subscription message. For those on Windows, improved error messages were created for when the wrong architecture Oracle Client is in the PATH environment variable. Improvements were also made to the debugging infrastructure and a number of bugs were squashed. The test suite has also been expanded. See the [full release notes](http://cx-oracle.readthedocs.io/en/latest/releasenotes.html#version-6-1-december-2017) for more information.

See [release notes](http://cx-oracle.readthedocs.io/en/latest/releasenotes.html#version-6-0-3-november-2017).