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Can you post your policy function here?
since VPD with column masking as you intend to configure is implemented as a significant rewrite of the SQL (not just by adding the predicate but using CASE in the select list)
there may be performance consequences, please check note 602280.1 Column Level VPD on Indexed Columns Can Lead to Slow Execution Plan,
Harm ten Napel
Edited by: hnapel on Jun 7, 2013 2:44 AM