Issue 6732: Extension_to_the_query_language (data-distribution-ftf) Source: (, ) Nature: Enhancement Severity: Significant Summary: Issue# 2035 Extension_to_the_query_language Issue [Boeing SOSCOE] ? SOSCOE has a need to allow function expressions to be added to the query language ? SOSCOE has created a provider property class that allows applications to have attributes with typed values; it becomes a triplet (name, type, value). Currently the “type” only supports simple types, but the intent is to extend it to well-known structured types. Proposal [Boeing] ? Extend the query language to allow user defined function expressions ? Extend the query language to allow user defined structured types Resolution: Revised Text: Actions taken: December 18, 2003: received issue Discussion: Discussion: The FTF recognizes this would be a useful facility. However, the FTF could not find suitable resolution within the time-frame of the FTF and therefore resolved to defer the issue to a future F/RTF or revision. End of Annotations:===== m: webmaster@omg.org Date: 18 Dec 2003 20:32:12 -0500 To: Subject: Issue/Bug Report -------------------------------------------------------------------------------- Name: Matt Liu Company: Boeing mailFrom: matthew.k.liu@boeing.com Notification: Yes Specification: Data Distribution Service for Real-Time Systems Section: Annex A FormalNumber: Unknown Version: 1.0 RevisionDate: 3/23/03 Page: 172 Nature: Enhancement Severity: Significant HTTP User Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; .NET CLR 1.1.4322) Description Issue# 2035 Extension_to_the_query_language Issue [Boeing SOSCOE] ? SOSCOE has a need to allow function expressions to be added to the query language ? SOSCOE has created a provider property class that allows applications to have attributes with typed values; it becomes a triplet (name, type, value). Currently the “type” only supports simple types, but the intent is to extend it to well-known structured types. Proposal [Boeing] ? Extend the query language to allow user defined function expressions ? Extend the query language to allow user defined structured types [OMG ISSUE# 6732, DDS# 62] Extension_to_the_query_language [Boeing SOSCOE] Ref# 2030 Extension_to_the_query_language SOSCOE has a need to allow function expressions to be added to the query language SOSCOE has created a provider property class that allows applications to have attributes with typed values; it becomes a triplet (name, type, value). Currently the .type. only supports simple types, but the intent is to extend it to well-known structured types. Proposal [Boeing] Extend the query language to allow user defined function expressions Extend the query language to allow user defined structured types Concrete changes: Need a function to be passed to the Query. Find good excuse not to do it now. HANS: elaborate filtering can always be done on application-level (instead of via a query). Content-filtered topics require filtering by the middleware on inserting in the application-cache, calling application-functions at that .level. of the middleware is considered too risky and non-deterministic