Consider an application consisting of transactions that are assigned different isolation levels. Prove that if transaction T is executed at SERIALIZABLE and transaction T is any other transaction, then T either sees all changes made by T or it sees none.
What will be an ideal response?
Transactions executing at all the isolation levels use long term write locks, and
transactions executing at SERIALIZABLE use long term read and write locks. Hence all
operations of T are serializable with respect to the write operations of T
. Hence T either sees all the changes made by T
or none.
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