DB2 9 & 10 for z/OS Overview

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Migration Planning WorkshopRow and Column level access …• What is the purpose of column level security?– Mask column values in answer set– Applicable to the output of outermost subselect– Defined as column masks:Optimizer inserts case statement in all SQL accessing table todetermine mask value to return in answer set138© 2011 IBM Corporation
Migration Planning WorkshopRow and Column level access …• Define a column or row policy based on who isaccessing the table– SESSION-USER• Primary authorization ID of the process– CURRENT SQLID• SQL authorization ID of the process• SET CURRENT SQLID = some authorization id– VERIFY_GROUP_FOR_USER (new BIF)• Get authorization IDs <strong>for</strong> the value in SESSION_USER– Gets both primary and secondary auth ids– Return 1 if any of those auth IDs are in the argument– VERIFY_ROLE_FOR_USER (new BIF)• Get the role <strong>for</strong> the value in SESSION_USER• Return 1 if the role is in the argument list139© 2011 IBM Corporation
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DB2 9 & 10 for z/OS Overview

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