Relational Technology, Inc., "INGRES Version 5.0 Reference Manual," November 1986.

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Extending a Data Base System with Procedures - Stonebraker, Anton, Hanson   (23 citations)  (Correct)

....forward from a checkpoint, I locks can be suitable updated. In summary, making I locks recoverable simply involves treating them as ordinary data and presents only modest implementation difficulties. The phantom problem poses more serious issues. Systems which perform page level locking (e.g. [RTI86, CHEN84]) have few difficulties supporting correct semantics in the presence of phantoms. Hence, one can include I locks in such systems without concern. However, finer granularity locking is required to avoid an excessive number of unnecessary invalidations. Systems which perform record level locking ....

Relational Technology, Inc., "INGRES Version 5.0 Reference Manual," November 1986.

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