Sqlalchemy-hana

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Breaking Changes
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Reworked the ``sqlalchemy_hana.errors`` package so that it can be used inside a SQLAlchemy
``handle_error`` event hook. Therefore

- ``wrap_dbapi_error`` was removed
- ``wrap_hdbcli_error`` was removed
- ``HANAError`` now extends ``sqlalchemy.exc.DBAPIError``

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Features
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- Support ``Identity`` columns
- Support additional cases for ``StatementExecutionError``

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Features
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- Support ``InvalidObjectNameError`` in ``sqlalchemy_hana.errors``
- Add ``convert_dbapi_error`` to ``sqlalchemy_hana.errors``

Bugfixes
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- Fixed an issue causing the usage of ALPHANUM to result in an AttributeError

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Features
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- Support CREATE and DROP of views
- Add limited UPSERT support
- Add support for exception wrapping by replacing hdbcli errors with more detailed ones if possible

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Bugfixes
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- Fixed an issue causing the alembic dialect to render a ``RENAME`` table statement wrongly

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Features
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- The statement caching capabilities of SQLAlchemy are now supported
- Calculated/Computed columns are now officially supported
- The following SAP HANA types are now supported: ``SECONDDATE``, ``LONGDATE`` and ``ALPHANUM``
- The module ``sqlalchemy_hana.types`` defines now all SAP HANA native types
- All *camelcase* types of SQLAlchemy are now supported. If SAP HANA does not support it, a
similar type is used automatically
- sqlalchemy-hana will now expose the version information of the connected SAP HANA instance,
filling the dialect field ``server_version_info``

Bugfixes
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- During column reflection all types will expose their respective length, scale and precision