next up previous
Next: Chapter 10 Up: Errata for ``Principles of Previous: Chapter 8

Chapter 9

Page 240:
In query $ q''$, the WHERE predicate should read $ P_2(R_{1}.A_{1}, \ldots, R_{n}.A_{n})$.
Page 243:
On line 16, replace $ V$ with $ R$.
Page 248:
In Example 9.6, the join order should be PROJ $ \Join_{\rm PNO}$ ASG $ \Join_{\rm ENO}$ EMP.
Page 268:
In Figure 9.14, in the lower table, $ R_{3}.B$ should be $ R_{2}.B$ and $ R_{4}.B$ should be $ R_{3}.B$. In the second iteration, $ SJ_2$ should have cost 80, not 200 (this is on line 6 from the bottom).


M. Tamer Ozsu
2001-01-12