Danette Chimenti, Ruben Gamboa, Ravi Krishnamurthy  Home/Search
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Abstract: We extend LDL to allow programs to call external procedures and vice versa. This extension allows the modularization of LDL, since external predicates are equivalent to external procedures written in LDL. External predicates are viewed as infinite relations so that the traditional semantics of logic programs remain applicable. To avoid computing infinite relations, wellformedness conditions for programs in extended LDL are given. The traditional optimization framework can still be used; it is... (Update)
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...e ciently, as we show in the next section. In LeSelect, a program 2 can be assimilated to a virtual table (a.k. a table function) as in [3, 5]. We use binding patterns to distinguish the attributes that correspond to program arguments (which need to be supplied in the query)...
...which forms the core of much of this paper. The integration of external relations into a cost based optimizer for LDL is discussed in [CGK89] The related, more general problem of creating and optimizing query plans over external sources with limited access patterns and...
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19: Access path selection in a relational database management system (context) - Selinger, Astrahan et al. - 1979
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BibTeX entry: (Update)
D. Chimenti, R. Gamboa, and R. Krishnamurthy. Towards an open architecture for LDL. In Proceedings of the 15th International VLDB Conference, pages 195--203, Amsterdam, The Netherlands, August 1989. http://citeseer.ist.psu.edu/chimenti89towards.html More
@inproceedings{ chimenti89towards,
author = "D. Chimenti and R. Gamboa and R. Krishnamurthy",
title = "Towards an Open Architecture for {LDL}",
booktitle = "Proceedings of the 15th Conference on Very Large Databases, Morgan Kaufman pubs. (Los Altos {CA}), Amsterdam",
year = "1989",
url = "citeseer.ist.psu.edu/chimenti89towards.html" }
Citations (may not include all citations):1838 Foundations of Logic Programming (context) - Lloyd - 1984 ACM
78 Optimization of Non-Recursive Queries (context) - Krishnamurthy, Boral et al. - 1986
40 Implementation of Logical Query Languages for Databases (context) - Ullman - 1985
30 Database Updates in Logic Programming (context) - Naqvi, Krishnamurthy - 1988
17 Distributed Databases: Principles & Systems (context) - Ceri, Pelagatti - 1984
10 Optimization in a Logic Based Language for Knowledge and Dat.. (context) - Krishnamurthy - 1988 ACM DBLP
4 Framework for Testing Safety and E#ective Computability of E.. (context) - Krishnamurthy, Ramakrishnan et al. - 1988
3 A Language for Data and Knowledge Bases (context) - Naqvi, Tsur - 1989
3 Access Path Selection in a Relational Database Management Sy.. (context) - Sellinger - 1979 ACM DBLP
2 Execution Models in LDL (context) - Chimenti, Gamboa et al.
2 Optimizing Existential Queries (context) - Ramakrishnan, Beeri et al. - 1988
2 NonDeterministic Choice in Datalog Programs (context) - Krishnamurthy - 1988
2 Incorporating Computed Relations in Relational Databases (context) - Maier, Warren - 1981
2 Modules and Externals in LDL (context) - Chimenti, Gamboa et al.
The graph only includes citing articles where the year of publication is known.
Documents on the same site (http://www.lim.com/~ruben/research/papers/modules.html):
Towards an Open Architecture for LDL - Chimenti, Gamboa, Krishnamurthy (1989) (Correct)
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