Object-oriented type inference
OOPSLA '91 Conference proceedings on Object-oriented programming systems, languages, and applications
Automated resolution of semantic heterogeneity in multidatabases
ACM Transactions on Database Systems (TODS)
Precise concrete type inference for object-oriented languages
OOPSLA '94 Proceedings of the ninth annual conference on Object-oriented programming systems, language, and applications
Proceedings of the tenth annual conference on Object-oriented programming systems, languages, and applications
Polymorphism and type inference in database programming
ACM Transactions on Database Systems (TODS)
Managing semantic heterogeneity in databases: a theoretical prospective
PODS '97 Proceedings of the sixteenth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
A Machine-Oriented Logic Based on the Resolution Principle
Journal of the ACM (JACM)
The object data standard: ODMG 3.0
The object data standard: ODMG 3.0
Type-checking OQL queries in the ODMG type systems
ACM Transactions on Database Systems (TODS)
Formal semantics and analysis of object queries
Proceedings of the 2003 ACM SIGMOD international conference on Management of data
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In this paper, we present an inference algorithm for OQL which both identifies the most general type of a query in the absence of schema type information, and derives the minimum type requirements a schema should satisfy to be compatible with this query. Our algorithm is useful in any database application where heterogeneity is encountered, for example, schema evolution, queries addressed against multiple schemata, inter-operation or reconciliation of heterogeneous schemata. Our inference algorithm is technically interesting as it concerns an object functional language with a rich semantics and complex type system. More precisely, we have devised a set of constraints and an algorithm to resolve them. Our resulting type inference system for OQL should be useful in any open distributed, or even semi-structured, database environment.