@inproceedings{7c2efffc40fa4dd2806416b4eb985beb,
title = "Estimating the output cardinality of partial preaggregation with a measure of clusteredness",
abstract = "We introduce a new parameter, the clusteredness of data, and show how it can be used for estimating the output cardinality of a partial preaggregation operator. This provides the query optimizer with an important piece of information for deciding whether the application of partial preaggregation is beneficial. Experimental results are very promising, due to the high accuracy of the cardinality estimation based on our measure of clusteredness.",
author = "Sven Helmer and Thomas Neumann and Guido Moerkotte",
year = "2003",
doi = "10.1016/b978-012722442-8/50064-1",
language = "English",
series = "Proceedings - 29th International Conference on Very Large Data Bases, VLDB 2003",
publisher = "Morgan Kaufmann",
pages = "656--667",
editor = "Freytag, {Johann Christoph} and Lockemann, {Peter C.} and Serge Abiteboul and Carey, {Michael J.} and Selinger, {Patricia G.} and Andreas Heuer",
booktitle = "Proceedings - 29th International Conference on Very Large Data Bases, VLDB 2003",
note = "29th International Conference on Very Large Data Bases, VLDB 2003 ; Conference date: 09-09-2003 Through 12-09-2003",
}