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Sequence of grant operations
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Figure 5.14 (in the attachment) shows a sequence of grant operations for a specific access right on a table. Assume that at t = 70, B revokes the access right from C. Using the conventions defined in Section 5.2, show the resulting diagram of access right dependencies.
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Solution briefly explains how the resulting access right dependencies diagram will be obtained.
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When B revokes the access right from C, first the line B-C will be deleted.
Next, the arc C-D that is labeled "t=30" will ...
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