This is the implementation of the SAP HANA data handler for MindsDB. SAP HANA, where HANA stands for High-performance ANalytic Appliance, is a multi-model database that stores data in its memory instead of keeping it on a disk. The column-oriented in-memory database design used by SAP HANA allows users to run advanced analytics alongside high-speed transactions in a single system.

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Implementation

This handler is implemented using hdbcli, the Python driver for SAP HANA. The required arguments to establish a connection are as follows:
  • host is the host name or IP address of the SAP HANA instance.
  • port is the port number of the SAP HANA instance.
  • user specifies the user name.
  • password specifies the password for the user.
  • schema sets the current schema, which is used for identifiers without a defined schema.
If you installed MindsDB locally via pip, you need to install all handler dependencies manually. To do so, go to the handler’s folder (mindsdb/integrations/handlers/hana_handler) and run this command: pip install -r requirements.txt.

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Usage

You can use the below SQL statements to create a schema in SAP HANA called MINDSDB and a table called TEST. 
CREATE SCHEMA MINDSDB;

CREATE TABLE MINDSDB.TEST
(
    ID          INTEGER NOT NULL,
    NAME        NVARCHAR(1),
    DESCRIPTION NVARCHAR(1)
);

CREATE UNIQUE INDEX MINDSDB.TEST_ID_INDEX
    ON MINDSDB.TEST (ID);

ALTER TABLE MINDSDB.TEST
    ADD CONSTRAINT TEST_PK
        PRIMARY KEY (ID);

INSERT INTO MINDSDB.TEST
VALUES (1, 'h', 'w');
In order to make use of this handler and connect to the SAP HANA database in MindsDB, the following syntax can be used: 
CREATE DATABASE sap_hana_trial
WITH
    ENGINE = 'hana',
    PARAMETERS = {
        "user": "DBADMIN",
        "password": "password",
        "host": "<uuid>.hana.trial-us10.hanacloud.ondemand.com",
        "port": "443",
        "schema": "MINDSDB",
        "encrypt": true
    };
The above example assumes usage of SAP HANA Cloud, which requires the encrypt parameter to be set to true and uses port 443.
You can use this established connection to query your table as follows: 
SELECT *
FROM sap_hana_trial.test;
On execution, we get:
IDNAMEDESCRIPTION
1hw