摘要: Arrays are an appropriate data model for images, gridded output from computational models, and other types of data. This paper describes approach to array query processing. Queries expressed in AML, a logical algebra that is easily extended with user-defined functions support wide variety operations. For example, compression, filtering, algebraic operations on images can be described. We show how AML expressions involving such treated declaratively subjected useful rewrite optimizations. also describe plan generator produces efficient iterator-based plans rewritten expressions.