User-Defined Table Operators: Enhancing Extensibility for ORDBMS

Summary: Introduces user-defined table operators: programmable N-ary relational operators in SQL/Embedded SQL, beyond scalar UDFs. Enables pushing complex application logic into ORDBMS servers with parallel, efficient execution and orders-of-magnitude speedups. (summarized by gpt-5.6-luna on Jul 24 2026)

Paper ID: h9b1fe242a7345dcd
Venue: VLDB
Year: 1999
Pagerank: 6.4476785e-05
Overall Rank: 4,726 | 68.23%
DOI: -

Incoming Non-self Citations Over Time

Authors

1. Michael Jaedicke (Technical University of Munich)
2. Bernhard Mitschang (University of Stuttgart)

BibTeX Citation

@article{jaedicke_vldb99,
        title = {{User-Defined Table Operators: Enhancing Extensibility for ORDBMS}},
        author = {Jaedicke, Michael and Mitschang, Bernhard},
        journal = {PVLDB},
        series = {{VLDB} '99},
        pages = {494--505},
        year = {1999}
}

Incoming Citations (Sorted by Pagerank)

Showing 4 of 4 citing papers.

Rank	Citing Paper	Year	Venue	Pagerank
1,037	Jaql: A Scripting Language for Large Scale Semistructured Data Analysis	2011	VLDB	0.00012376819
1,285	SQL/MapReduce: A practical approach to self-describing, polymorphic, and parallelizable user-defined functions	2009	VLDB	0.00011201377
2,915	F1 Query: Declarative Querying at Scale	2018	VLDB	7.8616593e-05
5,632	Combi-Operator – Database Support for Data Mining Applications	2003	VLDB	6.0581466e-05

Outgoing Citations (Sorted by Pagerank)

Showing 14 of 14 cited papers.

Citations counted here include only citations to other VLDB/SIGMOD/CIDR/PODS papers in this database.

Rank	Cited Paper	Year	Venue	Pagerank
87	Implementation of Integrity Constraints and Views by Query Modification	1975	SIGMOD	0.00035719146
125	Predicate Migration: Optimizing Queries with Expensive Predicates	1993	SIGMOD	0.00030470848
196	Grammar-like Functional Rules for Representing Query Optimization Alternatives	1988	SIGMOD	0.00025626873
273	Extensible Query Processing in Starburst	1989	SIGMOD	0.00022504729
752	Partition Based Spatial-Merge Join	1996	SIGMOD	0.00014246504
821	Query Execution Techniques for Caching Expensive Methods	1996	SIGMOD	0.00013660347
1,910	Integrating SQL Databases with Content-specific Search Engines	1997	VLDB	9.3936537e-05
2,294	A Comparison of Spatial Query Processing Techniques for Native and Parameter Spaces	1990	SIGMOD	8.6837534e-05
2,516	Optimization of Queries with User-defined Predicates	1996	VLDB	8.3610198e-05
2,571	The Case for Enhanced Abstract Data Types	1997	VLDB	8.2840962e-05
3,084	On Parallel Processing of Aggregate and Scalar Functions in Object-Relational DBMS	1998	SIGMOD	7.6630061e-05
5,189	Prospector: A Content-Based Multimedia Server for Massively Parallel Architectures	1996	SIGMOD	6.2370238e-05
7,520	Object-Relational Database Systems: Principles, Products, and Challenges (Tutorial)	1997	SIGMOD	5.5028891e-05
9,322	Second-Order Signature: A Tool for Specifying Data Models, Query Processing, and Optimization	1993	SIGMOD	5.1942711e-05

Semantically Similar Papers

#	Overall Rank	Paper	Year	Venue
1	1,285	SQL/MapReduce: A practical approach to self-describing, polymorphic, and parallelizable user-defined functions	2009	VLDB
2	5,771	Database Technology for the Masses: Sub-Operators as First-Class Entities	2021	VLDB
3	1,898	Querying Multiple Features of Groups in Relational Databases	1996	VLDB
4	9,694	The UDFBench Benchmark for General-purpose UDF Queries	2025	VLDB
5	6,296	Declarative Sub-Operators for Universal Data Processing	2023	VLDB
6	2,516	Optimization of Queries with User-defined Predicates	1996	VLDB
7	7,983	Efficient Execution of User-Defined Functions in SQL Queries	2023	VLDB
8	9,698	Using SQL to Build New Aggregates and Extenders for Object-Relational Systems	2000	VLDB
9	3,642	User-Defined Operators: Efficiently Integrating Custom Algorithms into Modern Databases	2022	VLDB
10	3,084	On Parallel Processing of Aggregate and Scalar Functions in Object-Relational DBMS	1998	SIGMOD