Hi Artem, That's some news indeed!
What's important IMO is that we agree to have a generic Query Interface as I mentioned in some previous email. In that manner we can continue to use HQL + introduce new query languages. This is good for extensibility and also for backward compatibility. Do you/we all agree on this? Thanks -Vincent On May 21, 2008, at 9:57 PM, Artem Melentyev wrote: > Hi, devs. > > Thanks for feedback. > > There are important info from JCR v2 [1] unfinished standard (Public > Review. Final release at Sep-2008): > http://wiki.apache.org/jackrabbit/Proposed_JCR_2%2e0_API_Changes > - xpath & jcrsql are deprecated in jcr2, but supported > + new language JCR-SQL2 which is much extended jcrsql with joins. > + new Java API for quering called QueryObjectModel (JCR-JQOM) (like > Hibernate Criteria or LINQ) > > recent Jackrabbit 1.4 already has this features, but they are not > stable > yet. > eXoJCR hasn't this features yet. > > Jackrabbit has a parser [2] from JCR-SQL2 to JCR-JQOM, so we can > simply > translate some subset of QOM to HQL. > > > What else parsers / query frameworks can you recommend? > I looked at some jpa, jdo ql implementations but they are not expose > nice Query Model for reuse. > > [1] http://www.jcp.org/en/jsr/detail?id=283 > [2] > http://jackrabbit.apache.org/api/1.4/org/apache/jackrabbit/core/query/sql2/Parser.html > > Artem Melentyev wrote: >> Hi, devs. >> >> I'm working on JCRStore and QueryPlugin and I want to get some >> feedback >> about >> http://dev.xwiki.org/xwiki/bin/view/Design/XWiki+Query+Language+Specification >> >> 1. Why our QueryPlugin's xpath isn't sufficient? (except it doesn't >> work >> now and some features are unimplemented :)) >> 2. Are we sure to use sql-like query language? >> I think sql isn't user friendly language. >> Also many features of sql (such as joins) is impossible for JCR. >> 3. What user query language would you prefer for xwiki? > > -- > Artem Melentyev > _______________________________________________ > devs mailing list > [email protected] > http://lists.xwiki.org/mailman/listinfo/devs _______________________________________________ devs mailing list [email protected] http://lists.xwiki.org/mailman/listinfo/devs
