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ICDE
2005
IEEE

Increasing the Accuracy and Coverage of SQL Progress Indicators

9 years 6 months ago
Increasing the Accuracy and Coverage of SQL Progress Indicators
Recently, progress indicators have been proposed for long-running SQL queries in RDBMSs. Although the proposed techniques work well for a subset of SQL queries, they are preliminary in the sense that (1) they cannot provide non-trivial estimates for some SQL queries, and (2) the provided estimates can be rather imprecise in certain cases. In this paper, we consider the problem of supporting non-trivial progress indicators for a wider class of SQL queries with more precise estimates. We present a set of techniques in achieving this goal. We report an initial implementation of these techniques in PostgreSQL.
Gang Luo, Jeffrey F. Naughton, Curt J. Ellmann, Mi
Added 01 Nov 2009
Updated 01 Nov 2009
Type Conference
Year 2005
Where ICDE
Authors Gang Luo, Jeffrey F. Naughton, Curt J. Ellmann, Michael Watzke
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