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SBMF
2010
Springer
149views Formal Methods» more  SBMF 2010»
13 years 2 months ago
Reasoning about Assignments in Recursive Data Structures
This paper presents a framework to reason about the eects of assignments in recursive data structures. We dene an operational semantics for a core language based on Meyer's id...
Alejandro Tamalet, Ken Madlener
ICDT
1999
ACM
133views Database» more  ICDT 1999»
13 years 11 months ago
A Framework for the Investigation of Aggregate Functions in Database Queries
Abstract. In this paper we present a new approach for studying aggregations in the context of database query languages. Starting from a broad de nition of aggregate function, we ad...
Luca Cabibbo, Riccardo Torlone
DBPL
1995
Springer
106views Database» more  DBPL 1995»
13 years 11 months ago
On Impossibility of Decremental Recomputation of Recursive Queries in Relational Calculus and SQL
We study the problem of maintaining recursively-de ned views, such as the transitive closure of a relation, in traditional relational languages that do not have recursion mechanis...
Guozhu Dong, Leonid Libkin, Limsoon Wong
TPHOL
2005
IEEE
14 years 1 months ago
Alpha-Structural Recursion and Induction
The nominal approach to abstract syntax deals with the issues of bound names and α-equivalence by considering constructions and properties that are invariant with respect to permu...
Andrew M. Pitts
VLDB
1989
ACM
137views Database» more  VLDB 1989»
13 years 11 months ago
Pasta-3's Graphical Query Language: Direct Manipulation, Cooperative Queries, Full Expressive Power
Graphical Direct Manipulation (GrDM) query languagesare characterized and positioned with respect to traditional textual query languages. After a brief survey of the current state...
Michel Kuntz, Rainer Melchert