The objects available within our connector are accessible from the "cdata.saperp" module. To use the module's objects directly:

1. Import the module as follows:
   

   import cdata.saperp as mod

2. To establish a connection string, call the connect() method from the connector object using an appropriate connection string, such as:
   

   mod.connect("Host=sap.mydomain.com;User=EXT90033;Password=xxx;Client=800;System Number=09;ConnectionType=Classic;")

Connecting with the RFC APIs

The CData Python Connector for SAP ERP uses the SAP RFC interface to connect to an SAP system. The ConnectionType specifies the RFC API you want to use to connect.

You must obtain the SAP libraries corresponding to your RFC API to connect.

Required RFCs

The RFCs used by the CData Python Connector for SAP ERP are listed as follows. If any listed below are not available, some or all functionality may not work. T-Code SE37 may be used to view available function modules in SAP.

• DDIF_FIELDINFO_GET
• RFC_GET_FUNCTION_INTERFACE
• RFC_GET_STRUCTURE_DEFINITION
• RFC_GET_SYSTEM_INFO
• RFC_GET_UNICODE_STRUCTURE
• RFC_READ_TABLE
• SLDAG_CHECK_FOR_UNICODE

Connecting to SAP ERP

Set the following to connect:

• Host: The host name of the target system. Host names can be regular host names defined in a hosts file, an IP address like 123.123.123.123, or an SAProuter address such as "/H/hostname/S/port/H/host/S/port/ ..."
• User: The user that is authenticating to the SAP system.
• Password: The password used to authenticate to the SAP system.
• Client: The client authenticating to the SAP system.
• SystemNumber: The number by which the target system is defined.
• Language: The ISO 639-1 language code you use to log into SAP ERP. The default is "EN".

To connect to a machine different from the Host machine, substitute Host with the following:

• GatewayHost: The gateway host you wish to connect to. If not specified, the provider will attempt to connect to the SAP system specified by Host.
• GatewayService: The gateway service you wish to connect to. If not specified, the SAP system will use the default "sapgw##" where the "##" is the SystemNumber.

To connect to a distributed system or systems with other configurations, see Fine-Tuning Data Access.

Certificates

In addition to User and Password, the CData Python Connector for SAP ERP also supports certificate authentication. To use certificate authentication, set the X509Certificate connection property to either point to a file that contains an X509 certificate in PEM format, or the PEM blob directly used for authentication during SAP Logon. In addition to setting X509Certificate, you will need to specify the appropriate SNC connection properties. The SNC connection properties are described under Fine-Tuning Data Access.