SAS/ACCESS 9.2 for Relational Databases: Reference, Fourth Edition

The ACCESS Procedure for Relational Databases 4 Example 1: Update an Access Descriptor 909Accessing Data Sets and DescriptorsSAS lets you control access to SAS data sets and access descriptors by associatingone or more SAS passwords with them. When you create an access descriptor, theconnection information that you provide is stored in the access descriptor and in anyview descriptors based on that access descriptor. The password is stored in anencrypted form. When these descriptors are accessed, the connection information thatwas stored is also used to access the DBMS table or view. To ensure data security, youmight want to change the protection on the descriptors to prevent others from seeingthe connection information stored in the descriptors.When you create or update view descriptors, you can use a SAS data set option afterthe ACCDESC= option to specify the access descriptor password, if one exists. In thiscase, you are not assigning a password to the view descriptor that is being created orupdated. Instead, using the password grants you permission to use the accessdescriptor to create or update the view descriptor. Here is an example:proc access dbms=sybase accdesc=adlib.customer(alter=rouge);create vlib.customer.view;select all;run;By specifying the ALTER level of password, you can read the AdLib.Customer accessdescriptor and create the Vlib.Customer view descriptor.Examples: ACCESS ProcedureExample 1: Update an Access DescriptorThe following example updates an access descriptor AdLib.Employ on the Oracletable Employees. The original access descriptor includes all of the columns in the table.The updated access descriptor omits the Salary and BirthDate columns.proc access dbms=oracle ad=adlaib.employ;/* update access descriptor */update adlib.employ.access;drop salary birthdate;list all;run;You can use the LIST statement to write all variables to the SAS log so that you can seethe complete access descriptor before you update it.