The Aqua approximate query answering system

Author:

Acharya Swarup1,Gibbons Phillip B.1,Poosala Viswanath1,Ramaswamy Sridhar2

Affiliation:

1. Information Sciences Research Center, Bell Laboratories, 600 Mountain Avenue, Murray Hill, NJ

2. Epiphany Inc., 2300 Geng Road, Suite 200, Palo Alto, CA and Information Sciences Research Center, Bell Laboratories, 600 Mountain Avenue, Murray Hill, NJ

Abstract

Aqua is a system for providing fast, approximate answers to aggregate queries, which are very common in OLAP applications. It has been designed to run on top of any commercial relational DBMS. Aqua precomputes synopses (special statistical summaries) of the original data and stores them in the DBMS. It provides approximate answers along with quality guarantees by rewriting the queries to run on these synopses. Finally, Aqua keeps the synopses up-to-date as the database changes, using fast incremental maintenance techniques.

Publisher

Association for Computing Machinery (ACM)

Subject

Information Systems,Software

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