Problem with Assigning more than one value to GROUP dynamically

Hi,
I have a problem with assigning more than one value to GROUP varible dynamically.
I am able to assign only one value dynamically through Initialization block
I have even tried with the ROW-WISE initialization blocks..
using this query..
SELECT 'GROUP', G.GROUP_NAME
FROM GROUP_MAP G
WHERE G.USER_NAME = ':USER'
if GROUP_1, GROUP_2 are two groups to be associated,
through this, i'm getting " GROUP_1;GROUP_2 " into GROUP variable ( seen from Narative view )
And the properties and securities of this Groups are not inherited.
Please let me know if there is any other way to Populate the GROUP variable dynamically with more than one value.
Thank you.,

Hi,
i finally got in this way..
i had created a function which takes USER_NAME as input and returns a string that contains the GROUP names with semicolon delimeted..
Though it is same as that of ROW-WISE initialization,
the properties of those groups are also being inherited..
Now, i can assign more than one groups and its properties to a user dynamically.

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