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Python Connector Libraries for SAP HANA XS Advanced Data Connectivity. Integrate SAP HANA XS Advanced with popular Python tools like Pandas, SQLAlchemy, Dash & petl.

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How to use SQLAlchemy ORM to access SAP HANA XS Advanced Data in Python


Create Python applications and scripts that use SQLAlchemy Object-Relational Mappings of SAP HANA XS Advanced data.

The rich ecosystem of Python modules lets you get to work quickly and integrate your systems effectively. With the CData Python Connector for SAP HANA XS Advanced and the SQLAlchemy toolkit, you can build SAP HANA XS Advanced-connected Python applications and scripts. This article shows how to use SQLAlchemy to connect to SAP HANA XS Advanced data to query SAP HANA XS Advanced data.

With built-in optimized data processing, the CData Python Connector offers unmatched performance for interacting with live SAP HANA XS Advanced data in Python. When you issue complex SQL queries from SAP HANA XS Advanced, the CData Connector pushes supported SQL operations, like filters and aggregations, directly to SAP HANA XS Advanced and utilizes the embedded SQL engine to process unsupported operations client-side (often SQL functions and JOIN operations).

Connecting to SAP HANA XS Advanced Data

Connecting to SAP HANA XS Advanced data looks just like connecting to any relational data source. Create a connection string using the required connection properties. For this article, you will pass the connection string as a parameter to the create_engine function.

SAP HANA XSA uses the OAuth authentication standard. Before connecting, it is necessary to establish an SAP HANA XSA OData Service. See the OAuth section in the Help documentation for a guide.

Follow the procedure below to install SQLAlchemy and start accessing SAP HANA XS Advanced through Python objects.

Install Required Modules

Use the pip utility to install the SQLAlchemy toolkit and SQLAlchemy ORM package:

pip install sqlalchemy pip install sqlalchemy.orm

Be sure to import the appropriate modules:

from sqlalchemy import create_engine, String, Column from sqlalchemy.ext.declarative import declarative_base from sqlalchemy.orm import sessionmaker

Model SAP HANA XS Advanced Data in Python

You can now connect with a connection string. Use the create_engine function to create an Engine for working with SAP HANA XS Advanced data.

NOTE: Users should URL encode the any connection string properties that include special characters. For more information, refer to the SQL Alchemy documentation.

engine = create_engine("saphanaxsa:///?OAuthClientID=my-ouath-client-id&OAuthClientSecret=my-oauth-client-secret&URL=https://hxehost:51027/euro.xsodata&CallbackURL=http://localhost:33333&InitiateOAuth=GETANDREFRESH&OAuthSettingsLocation=/PATH/TO/OAuthSettings.txt")

Declare a Mapping Class for SAP HANA XS Advanced Data

After establishing the connection, declare a mapping class for the table you wish to model in the ORM (in this article, we will model the table). Use the sqlalchemy.ext.declarative.declarative_base function and create a new class with some or all of the fields (columns) defined.

base = declarative_base() class (base): __tablename__ = "" = Column(String,primary_key=True) = Column(String) ...

Query SAP HANA XS Advanced Data

With the mapping class prepared, you can use a session object to query the data source. After binding the Engine to the session, provide the mapping class to the session query method.

Using the query Method

engine = create_engine("saphanaxsa:///?OAuthClientID=my-ouath-client-id&OAuthClientSecret=my-oauth-client-secret&URL=https://hxehost:51027/euro.xsodata&CallbackURL=http://localhost:33333&InitiateOAuth=GETANDREFRESH&OAuthSettingsLocation=/PATH/TO/OAuthSettings.txt") factory = sessionmaker(bind=engine) session = factory() for instance in session.query().filter_by(=""): print(": ", instance.) print(": ", instance.) print("---------")

Alternatively, you can use the execute method with the appropriate table object. The code below works with an active session.

Using the execute Method

_table = .metadata.tables[""] for instance in session.execute(_table.select().where(_table.c. == "")): print(": ", instance.) print(": ", instance.) print("---------")

For examples of more complex querying, including JOINs, aggregations, limits, and more, refer to the Help documentation for the extension.

Free Trial & More Information

Download a free, 30-day trial of the CData Python Connector for SAP HANA XS Advanced to start building Python apps and scripts with connectivity to SAP HANA XS Advanced data. Reach out to our Support Team if you have any questions.