T1 |
T2 |
T3 |
T4 |
|
R(X) |
|
|
|
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W(X) |
|
|
|
C3; |
|
W(X) |
|
|
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C1; |
|
|
|
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W(Y) |
|
|
|
R(Z) |
|
|
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C2; |
|
|
|
|
|
R(X) |
|
|
|
R(Y) |
|
|
|
C4; |
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Doubt: Transaction T3 is commited before T1 and w-w problem.This results is there any edge between T3 and T1 in precedence graph or not??