Tuple

About: Tuple is a research topic. Over the lifetime, 6513 publications have been published within this topic receiving 146057 citations. The topic is also known as: tuple & ordered tuplet.

Efficient type-ahead search on relational data: a TASTIER approach

Abstract: Existing keyword-search systems in relational databases require users to submit a complete query to compute answers. Often users feel "left in the dark" when they have limited knowledge about the data, and have to use a try-and-see approach for modifying queries and finding answers. In this paper we propose a novel approach to keyword search in the relational world, called Tastier. A Tastier system can bring instant gratification to users by supporting type-ahead search, which finds answers "on the fly" as the user types in query keywords. A main challenge is how to achieve a high interactive speed for large amounts of data in multiple tables, so that a query can be answered efficiently within milliseconds. We propose efficient index structures and algorithms for finding relevant answers on-the-fly by joining tuples in the database. We devise a partition-based method to improve query performance by grouping highly relevant tuples and pruning irrelevant tuples efficiently. We also develop a technique to answer a query efficiently by predicting the highly relevant complete queries for the user. We have conducted a thorough experimental evaluation of the proposed techniques on real data sets to demonstrate the efficiency and practicality of this new search paradigm.

Formal Systems for Tuple and Equality Generating Dependencies

Abstract: We develop several formal systems for tuple and equality generating dependencies. There are three kinds of systems, based upon substitution, tuple elimination and transitivity. We specialize our systems to several subclasses: total dependencies, template dependencies and binary dependencies. We also show that finding a formal system for embedded multivalued dependencies is equivalent to solving the implication problem for that class.

Indexing system and method

Abstract: A method for generating an index of data available from a server, including processing data on the server to access data items for a central index, the data items including network addresses and terms, compiling an index file including the data items, and transmitting the index file to the central index. The processing may include locating database query statements in the data, and the data items then include input tuples for the statements. The index is accessible from servers, and includes page entries including a program address for a program for generating a dynamic page and input tuples for submission to the program to generate the page, and search entries identifying the dynamic pages and identifying the tuples corresponding to search terms. A search engine operable on the index, is able to access the search entries to identify dynamic pages corresponding to search terms of a search query, and access the page entries to generate addresses for the dynamic pages identified, the addresses being generated on the basis of the program address and the tuples.

Checking for k -anonymity violation by views

Abstract: When a private relational table is published using views, secrecy or privacy may be violated. This paper uses a formally-defined notion of k-anonymity to measure disclosure by views, where k >1 is a positive integer. Intuitively, violation of k-anonymity occurs when a particular attribute value of an entity can be determined to be among less than k possibilities by using the views together with the schema information of the private table. The paper shows that, in general, whether a set of views violates k-anonymity is a computationally hard problem. Subcases are identified and their computational complexities discussed. Especially interesting are those subcases that yield polynomial checking algorithms (in the number of tuples in the views). The paper also provides an efficient conservative algorithm that checks for necessary conditions for k-anonymity violation.