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Changelog

4.4.0

Features

  • Handle error code -10735 as ClientConnectionError
  • Handle HANA Database instance resize in progress as DatabaseConnectNotPossibleError

4.3.0

Features

  • Release of experimental asyncio support

4.2.0

Features

  • Added NumberOfTransactionsExceededError to sqlalchemy_hana.errors
  • Added DistributedTransactionCommitFailureError to sqlalchemy_hana.errors

4.1.0

Features

  • Handle TransactionManager is not yet fully initialized as DatabaseConnectNotPossibleError

4.0.0

Features

  • Support python 3.14
  • Add error handling of session context error
  • Removed support for python 3.9
  • Removed support for sqlalchemy 1.4

3.0.3

Fixes

  • Added REAL_VECTOR to __all__ of sqlalchemy_hana.types

3.0.2

Fixes

  • Fixed an issue causing issues with sqlalchemy 2.0.40

3.0.1

Fixes

  • Fixed an issue causing sqlalchemy_hana.elements.view to fail with sqlalchemy 2.0.38

3.0.0

Breaking Changes

  • Removed support for Python 3.8

2.8.0

Features

  • Support python 3.13
  • Added support for the REAL_VECTOR type incl. various utility function

2.7.0

Features

  • sqlalchemy_hana.errors will now raise a StatementExecutionError``if the messages contains ``temp index not exists

2.6.0

Features

  • An error during a rollback to a savepoint is ignored, if the transaction was already rolled back by SAP HANA. Based on this feature, sqlalchemy_hana.errors will no longer extract an inner error if a savepoint was not found.

2.5.0

Features

  • sqlalchemy_hana.errors will now raise a SequenceLockTimeoutError error for error messages a lock wait timeout error caused by a sequence
  • uuid types can now be backed by VARBINARY instead of NVARCHAR. For this use the sqlalchemy_hana.types.Uuid type with as_varbinary=True

2.4.0

Features

  • sqlalchemy.func.now will be rendered as CURRENT_TIMESTAMP

2.3.0

Features

  • sqlalchemy_hana.errors will now raise a WriteInReadOnlyReplicationError error for error messages indicating a write statement in a read-only replication

2.2.0

Features

  • Added basic JSON support (contributed by @Zahlii)
  • sqlalchemy_hana.errors will now raise a DatabaseConnectNotPossibleError error for hdbcli error code 1888

2.1.0

Features

  • Add error handling for SAP HANA Cloud region maintenance error
  • Add additional caching to reflection methods (contributed by @Masterchen09)

Bugfixes

  • Fixed an issue causing get_table_oid to fails of the inspector was created based on an engine (contributed by @Masterchen09)

2.0.0

Breaking Changes

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

1.4.0

Features

  • Support Identity columns
  • Support additional cases for StatementExecutionError

1.3.0

Features

  • Support InvalidObjectNameError in sqlalchemy_hana.errors
  • Add convert_dbapi_error to sqlalchemy_hana.errors

Bugfixes

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

1.2.0

Features

  • 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

1.1.1

Bugfixes

  • Fixed an issue causing the alembic dialect to render a RENAME table statement wrongly

1.1.0

Features

  • 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

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

1.0.1

Bugfixes

  • Version 1.0.0 states that is_distinct_from is supported, but the dialect specified supports_is_distinct_from=False. The value was changed to True
  • Fixed an issue causing is_not_distinct_from to fail with an SQL syntax error
  • Make sure that Text types are really rendered as UnicodeText
  • Removed misleading get_dbapi_type from Boolean

1.0.0

Breaking Changes

  • By default native booleans are used. If integer based columns should be used, specify use_native_boolean=False in create_engine
  • Columns of SQLAlchemy type String are now created with the SAP HANA SQL type NVARCHAR. The previously used SAP HANA SQL type VARCHAR has been only designed for 7-bit ASCII character data. Storing other non-ASCII characters in a different encoding like UTF-8 was sometimes possible but never intended or recommended It may cause unexpected behavior for certain database-side operations like sorting or failures with string functions With the introduction of SAP HANA Cloud, the SQL type VARCHAR is also only an alias for NVARCHAR.
  • Columns of SQLAlchemy type Text are now created with the SAP HANA SQL type NCLOB instead of CLOB. Like the SAP HANA SQL type VARCHAR, CLOB was designed for 7-bit ASCII character data. This change also ensures consistency and compatibility with SAP HANA Cloud, where CLOB is just an alias for NCLOB
  • Removed pyhdb support because pyhdb is out of maintenance and the GitHub repository was archived. Please migrate to hdbcli as it also supports connections towards SAP HANA Cloud databases.
  • Removed support for Python versions below version 3.8
  • Removed support for SQLAlchemy below version 1.4
  • Removed support for hdbcli below version 2.10
  • Removed the hidden and outdated feature auto_convert_lobs

Features

  • Official support for SQLAlchemy 1.4 and 2.0
  • Official support for Python 3.11 and 3.12
  • Support the SAP HANA datatype SMALLDECIMAL
  • Support native booleans (this is the new default)
  • The sqlalchemy_hana package is fully typed and exports its types
  • The Alembic dialect left the preview stage and is now included by default. Please install sqlalchemy-hana with the alembic requirement like pip install sqlchemy-hana[alembic]. Supported is Alembic 1.12 onwards.
  • Specified the SQLAlchemy statement caching support explicitly to false. Support might be added later (see #126)
  • Support regexp_match and regexp_replace
  • Allow usage of is_distinct_from operator through a SAP HANA compatible expression
  • Prefer dialect types in get_columns
  • Allow usage of additional options (e.g. nowait) in with_for_update when using read=True
  • Added CI with linters and testing utilizing the SQLAlchemy and Alembic test suite

Bugfixes

  • Fixed a bug with SQLAlchemy's custom AUTOCOMIT isolation level. If the user changed the isolation level from AUTOCOMMIT to something else, the dialect didn't notified the underlying database connection and it stayed in autocommit mode while the user expected the typical transaction behavior and the defined isolation level.

0.5.0

  • Improved support for ''SELECT FOR UPDATE'' statements.

0.4.0

  • Support for inspection of table oid
  • Support for table comments
  • Support for setting and reflecting isolation level

0.3.0

  • Backward incompatible change: The hana:// DBURI schema will now use hdbcli by default.
  • Support of Python 3
  • Support for check constraints
  • Support for foreign key options and name
  • Support for tenant specification in connect URL and automatic sql port discovery
  • Support for autocommit
  • Support for temporary tables

0.2.2

  • Support of named constraints
  • Reflection is now able to detect named constraints
  • Fixed reflection of view columns with newer SAP HANA versions
  • Allow construction of more complex SELECT FOR UPDATE statements
  • Fixed bug with table argument hana_table_type that could lead to invalid CREATE TABLE statements
  • Replace standard reserved words with SAP HANA reserved words in HANAIdentifierPreparer

0.2.1

  • Fix LOB handling with hdbcli driver

0.2.0

  • Added basic support for hdbcli driver
  • Allow specification of table type via hana_table_type

0.1.2

  • Cleanup of setup.py
  • Release on PyPi

0.1.0

  • Added support for LOBs

0.0.1

  • Initial version