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Informix Interview Question:

What are the uses of key value locking in Informix?

Submitted by: Administrator
he database server uses a concept called key-value locking to lock the deleted row. When the database server deletes a row, key values in the indexes for the table are not removed immediately. Instead, each key value is marked as deleted, and a lock is placed on the key value. One of the most important uses for key-value locking is to assure that a unique key remains unique through the end of the transaction that deleted it.
Submitted by: Administrator

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