Foreign Key tutorial in SAP HANA. V A foreign key is a column (or columns) that references a column (most often the primary key) of another table. The purpose of the foreign key is to ensure referential integrity of the data.

SAP HANA system supports two types of License keys − • Temporary License Key − Temporary License keys are automatically installed when you install the HANA database. These keys are valid only for 90 days and you should request permanent license keys from SAP market place before expiry of this 90 days period after installation. • Permanent License Key − Permanent License keys are valid only till the predefine expiration date.

License keys specify amount of memory licensed to target HANA installation. They can installed from SAP Market place under Keys and Requests tab. When a permanent License key is expired, a temporary license key is issued, which is valid for only 28 days. During this period, you have to install a permanent License key again.

You can use the program saplikey to install, check, and administer digitally-signed license keys in your SAP system. It resides in the directory /usr/sap//SYS/exe/run.

As of release 4.5A, the database interface library is linked dynamically. To allow saplikey to locate this library, the following variables must be set in the environment of the user calling saplikey. • dbms_type = (such as ora, inf, ada, mss, db2, db4, db6) • DIR_LIBRARY = (for example, /usr/sap/SID/SYS/exe/run) • Logged on as the user adm. When you enter commands, always specify the profile: saplikey pf= SAPLIKEY Command Options -delete: Delete installed license key. -get / -number: Display hardware key (Execute the command in central instance). -help: Full list of saplikey command options. -install: Install license key.

-show: Show all installed license keys. -temp: Install a temporary license key -version: Display the saplikey version.

Example Installing the SAP license. Itsiti:araadm > saplikey pf= -install SAP License Key Administration - Copyright (C) 2003 - 2007 SAP AG 1 SAP license key(s) successfully installed. Note • This is a newer way to install the SAP license from OS level. You can find the older way at this article, • For Microsoft Windows systems, replace the forward slash (/) with a backslash ( ) in all path names.

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