Detecting estimation errors in dictinct page counts

Details Detecting estimation errors in dictinct page counts Detecting estimation errors in dictinct page counts

2011-06-07

2011-06-07

Hicks, Michael (Department: 2165)

Data processing: database and file management or data structures

Database and file access

Query optimization

Reexamination Certificate

active

07958114

ABSTRACT:
A database server may be configured to compute distinct page counts of pages accessed to execute operands of respective queries. The queries may be executed against a table comprised of the pages and having an index managed by the database server. The distinct page counts may be obtained by counting, as a part of the executing of the queries, distinct pages accessed during the execution of the queries.

REFERENCES:
Stillger et al., “LEO—DB2's Learning Optimizer”, Proc. of the 27th VLDB Conference, 2001, ACM.

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