korth book

Question

is view serializability is the necessary condition for serializability?? pls help

Comments

http://www.edugrabs.com/how-to-check-for-view-serializable-schedule/

Here it is given that View Serializabilty is necessary and sufficient condition for serializable schedule.

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a is necessary for b

b->a

view serializability is the necessary condition for serializability

serializablity-> view serializablity

is true as every serializable are view serializable

Answer 1

Of course, it needed. without it the transaction became non-serializable.