HANA SDA configuration for MSSQL
SAP HANA smart data access allows you to access remote data as if the data was stored in local tables in SAP HANA, without copying the data into SAP HANA.
In this blog, we will show you how to set up SDA for SQL SERVER 13. The steps are also same for SQL SERVER 12.
Download and install Microsoft ODBC driver
Follow the introduction as the following Microsoft official link(Choose the commands according to your OS):
https://docs.microsoft.com/en-gb/sql/connect/odbc/linux-mac/installing-the-microsoft-odbc-driver-for-sql-server?view=sql-server-2017#microsoft-odbc-driver-131-for-sql-serverUsing the “root” user, run the following red commands to install the Microsoft ODBC driver in your HANA server if your HANA OS is SUSE Linux Enterprise Server 12
sudo su zypper ar https://packages.microsoft.com/config/sles/12/prod.repo exit sudo ACCEPT_EULA=Y zypper install msodbcsql # optional: for bcp and sqlcmd sudo ACCEPT_EULA=Y zypper install mssql-tools echo 'export PATH="$PATH:/opt/mssql-tools/bin"' >> ~/.bash_profile echo 'export PATH="$PATH:/opt/mssql-tools/bin"' >> ~/.bashrc source ~/.bashrc # optional: for unixODBC development headers sudo zypper install unixODBC-devel
After the installation, there will be /opt/microsoft/msodbcsql/lib64 generated. And the driver libmsodbcsql-13.1.so.9.2 should be in this dirctiory.
Install and test using unixODBC to check if the ODBC connection can be set well.
Actually during setting up SDA, we can skip this step in configuring the SDA to MSSQL. But we strongly recommend you installing the unixODBC to test if the ODBC connection can be set correctly. Only when the unixODBC test works, and then the SDA will work.
a) Go to unixODBC offical page http://www.unixodbc.org/ -> Download, follow the steps in the page to install the unixODBC.
Once the unixODBC is installed, check if the drivers installed properly.
>> isql --version
The output should be the version of unixODBC “unixODBC 2.3.1”
b) Using command “odbcinst -j” to know where the odbc.ini is located, and then we need to create the DSN in the odbc.ini file to set up the odbc connection.
<hostname>:~ # odbcinst -j unixODBC 2.3.1 DRIVERS............: /etc/unixODBC/odbcinst.ini SYSTEM DATA SOURCES: /etc/unixODBC/odbc.ini FILE DATA SOURCES..: /etc/unixODBC/ODBCDataSources USER DATA SOURCES..: /root/.odbc.ini SQLULEN Size.......: 8 SQLLEN Size........: 8 SQLSETPOSIROW Size.: 8
Configure the odbc.ini file “/etc/unixODBC/odbc.ini” :
The format is like below:
[<DATABASE_NAME>] servernode = <client_ip_address>:<sqlserver_port>In my example, the DSN is like the following:
[MSSQL] Driver= /opt/microsoft/msodbcsql/lib64/libmsodbcsql-13.1.so.9.2 Server=<SQLSERVER_IP_ADDRESS>,1433
The port number got from “Sql Server Configuration Manager” -> Protocols for MSSQLSERVER -> TCP/IP -> TCP Port :
c) Test the ODBC connection by the following command:
isql -v <DATABASE_NAME> <user> <password>
Once this has been established successfully, then we can configure the SDA much quickly.
Set up SQL Server ODBC Driver
a) Change to <sid>adm $HOME directory
In /usr/sap/<SID>/home create file “.customer.sh” by <sid>adm userAdd the following to the file “.customer.sh”
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/opt/microsoft/msodbcsql/lib64 export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/lib64
Then source file “.customer.sh” .
And check if the path has been added to the enviroment LD_LIBRARY_PATH
Check if “/opt/microsoft/msodbcsql/lib64” and “/usr/local/lib64” has been added to the environment LD_LIBRARY_PATH . If not, please restart your HANA instance and check it again.
- Create a DSN Entry
Change to <sid>adm $HOME directory
In /usr/sap/<SID>/home , create “.odbc.ini” file, the same as we create in /etc/unixODBC/odbc.ini file.[MSSQL]
And restart HANA instance to apply the changes to the .INI file.
- HANA studio -> Provisioning -> Remote Sources -> New remote source
- Save the configuration, then the SDA remote connection is configured successfully.
And then you could add the virtual table to one schema of current HANA DB.
For more other detailed information about SDA, you could refer to the latest HANA Admin Guide.
Useful, Amazing blogs！
Back in 2016 for SAP HANA 1.0 SPS 11, I recorded a video tutorial on this topic, cf. https://blogs.sap.com/2016/04/15/microsoft-odbc-driver-for-sql-server-on-linux-by-the-sap-hana-academy/
Would you know if anything changed since?
As far as I know, there is no big change since your then. I provide more information on SQL SERVER 13 driver installation and unixodbc installation.
we configured SDA to MSSQL ,sometime it works as expected but most of the time we are getting the below error
An internal error occurred during: "Fetching children ...".
while trying to invoke the method java.sql.Connection.prepareCall(java.lang.String) of a null object loaded from local variable 'connection'
Please let us know the solution for this issue.
Please be aware that port 1433 is only the default one and may not be correct.
You might be given the instance name instance and this will determine port by connecting to port 1434/UDP and then figuring out the real service TCP port.
FreeTDS configuration file reference explains it very well, and here is a working freetds.conf example for two servers: SERVER_ONE is connecting via port 1433, SERVER_TWO is connecting via the yet unknown TCP port.
To access SERVER_TWO, one will need to give SERVER_TWO.contoso.com\INST02 as the server name and no port, also for ODBC.
Figuring out the real TCP port may be needed for firewall traversal, this can be detected using FreeTDS tsql client in verbose mode.
In a scale-out landscape, install the unixODBC driver on all hosts and make sure all modified files (.odbc.ini, .customer.sh) and LD_LIBRARY_PATH are the same on each host.