2319654 - Database permission errors during PREP_INSTALL/SHDINST_DB_PREP

When upgrading the SAP system with Software Update Manager (SUM), during the configuration step PREP_INSTALL/SHDINST_DB_PREP, you get the following errors:

Checks after phase PREP_INSTALL/SHDINST_DB_PREP were negative!
Last error code set: Process E:\usr\sap\ED8\SUM\abap\bin/SAPuptool exited with 20, see 'C:\usr\sap\<SID>\SUM\abap\log\SQLSTMTSTD.OUT' for details.

The results in the file SQLSTMTSTD.OUT shows:

FATAL ERROR: DBSL error 99 (db code 15151):
Cannot alter the role 'db_ddladmin', because it does not exist or you do not have permission.
SAPup> Process with PID 9652 terminated with status 20 at 20160511195920!

Or:

Cannot alter the role 'db_owner', because it does not exist or you do not have permission.

This may also fail with other commands like sp_grantdbaccess,  sp_addrolemember, etc.
 

• SAP Systems based on SAP NetWeaver;
• Microsoft SQL Server 2005 and higher;

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