Object-oriented databases
Deborah Jing-Hwahwang February, Deborah Jing-hwa Hwang, Deborah Jing-hwa Hwang · Choice Reviews Online · 1991
Object-oriented databases havebeendeveloped to allow applications to store persistent data in the form of objects. As in conventional databases, object-oriented databases need to support queries that allow associative access to data by describing a property of the data of interest. In particular, they should support queries over user-defined sets based on user-defined functions that compute the propertyofinterest. Tomakesuch function-based queries run faster, wemust support function-based indexes where the keys are these computed properties. Function-based indexes are harder to maintain than indexes in conventional databases because mutations that affect keys can be done without accessing an element of the indexed set.