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Building indexes on columns containing large objects

  • US 6,243,718 B1
  • Filed: 09/24/1999
  • Issued: 06/05/2001
  • Est. Priority Date: 10/31/1997
  • Status: Expired due to Term
First Claim
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1. A method for accessing data that belongs to a particular snapshot, the method comprising the steps of:

  • using an index to locate an index entry associated with the data;

    applying one or more undo records to the index entry to reconstruct a non-current version of the index entry;

    reading location information from the non-current version of the index entry; and

    accessing a non-current version of the data stored at a location identified by the location information;

    wherein both the non-current version of the index entry and the non-current version of the data belong to the particular snapshot.

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