Publication
SIGMOD 1982
Conference paper

Common expression analysis in database applications

View publication

Abstract

Independent optimization of database requests overlooks potential savings which can be achieved when they are optimized collectively. An intuitive model for queries called the query graph supports common expression detection for optimization of a stream of requests. We describe how ad hoc query processing can be improved using intermediate results and answers produced from earlier queries, without significantly impacting processing costs when no common expressions are found. We have written a Pascal program, COMMON, which implements a variation of the algorithm which we describe.

Date

02 Jun 1982

Publication

SIGMOD 1982

Authors

Share