On 24 March 2010 23:42, Mike Ayers <[email protected]> wrote:
>    ... the point of the mask [is] It allows you to skip one or more 
> identifiers in an OID
> specification.  The typical use case is for tables - access can be allowed to 
> some
> of the conceptual columns by setting the mask bit to 0 for the index.

Another typical use case would be to set the mask bit to 0 for the
_column_ subidentifier,
but specify an explicit index value in the view OID with the
corresponding mask bit(s) set to 1.
That would allow (or deny) access to an individual row of the table.

Dave

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