Answering why-not questions on reverse top- k queries
نویسندگان
چکیده
منابع مشابه
Answering Why-not Questions on Reverse Top-k Queries
Why-not questions, which aim to seek clarifications on the missing tuples for query results, have recently received considerable attention from the database community. In this paper, we systematically explore why-not questions on reverse top-k queries, owing to its importance in multi-criteria decision making. Given an initial reverse top-k query and a missing/why-not weighting vector set Wm th...
متن کاملEfficient Refining Of Why-Not Questions on Top-K Queries
After decades of effort working on database performance, the quality and the usability of database systems have received more attention in recent years. In particular, answering the why-not questions after a search is made has become more important. In this project, the problem of answering why-not questions on topk queries and refining the user query is solved. Generally many users love to pos...
متن کاملImmutably Answering Why-Not Questions for Equivalent Conjunctive Queries
Answering Why-Not questions consists in explaining to developers of complex data transformations or manipulations why their data transformation did not produce some specific results, although they expected them to do so. Different types of explanations that serve as Why-Not answers have been proposed in the past and are either based on the available data, the query tree, or both. Solutions (par...
متن کاملIndexing Reverse Top-k Queries
We consider the recently introduced monochromatic reverse top-k queries which asks for, given a new tuple q and a dataset D, all possible top-k queries on D ∪ {q} for which q is in the result. Towards this problem, we focus on designing indexes in two dimensions for repeated (or batch) querying, a novel but practical consideration. We present the novel insight that by representing the dataset a...
متن کاملAnswering Top-k Similar Region Queries
Advances in web technology have given rise to new information retrieval applications. In this paper, we present a model for geographical region search and call this class of query similar region query. Given a spatial map and a query region, a similar region search aims to find the top-k most similar regions to the query region on the spatial map. We design a quadtree based algorithm to access ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Proceedings of the VLDB Endowment
سال: 2015
ISSN: 2150-8097
DOI: 10.14778/2752939.2752943