Controlling visibility in multi-version database systems

Data processing: database and file management or data structures – Database design – Data structure types

Reexamination Certificate

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Details

C707S793000, C707S793000, C707S793000

Reexamination Certificate

active

10646522

ABSTRACT:
A multi-version database system controls visibility of data during transaction processing. A transaction includes a transaction identifier that identifies the transaction and an invisibility list of transactions whose effects are invisible to the transaction. Changes made by other transactions are visible to the transaction based on the isolation level of the transaction. Records are visible to a transaction based on a creator identifier stored in the record that identifies the transaction that created the record.

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Bernstein, P.A., et al., “Multiversion Concurrency Control,” Addison-Wesley Publishing Company, 143-166, 1987.
Berenson, H., et al., “A Critique of ANSI SQL Isolation Levels,”SIGMOD '95.

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