Thanks, Stefan. Will see what I can cook up. But I am guessing that once you have the AST, it would be fairly easy to generate the LINQ query. And, since Mono has implemented LINQ, there may be some code I can scavenge there.
If this were possible, then one could really put the L2 query cache on drugs: not only cache the query results, but also the LINQ equivalent of the HQL, so that the LINQ query could be *run on the entity cache*. Which would mean that after an insert, the query could be updated rather than invalidated, as it is currently done. On Nov 17, 3:52 am, Stefan Wenig <[email protected]> wrote: > I was just going off on a tangent. AFAIK, what you describe cannot be > done, unless somebody comes and builds it. Wouldn't hold my breath > though, HQL was not built for in-memory execution. > > I'd rather go look for a way to serialize in-memory LINQ queries. > > http://stackoverflow.com/questions/4036489/what-is-the-easiest-way-to... > > Also, Silverlight RIA toolkit has code that does that. For remote > invocation, not storage, but hey... > problems: > - in RIA toolkit, serialization (client) and deserialization (server) > use similar, but different types. > - if you compile an IQueryable expression, it will compile to the > IQueryable and Queryable extension methods. you'd need to replace that > with IEnumerable and Enumerable extension methods so that they > actually do the work instead of just creating expression trees again. > > Other stuff might be available. Tell us if you find a way! > > HTH, > Stefan > > On 16 Nov., 21:12, Throckmorton <[email protected]> wrote: > > > Wait a second, I'm confused. > > > a) I start with an HQL query, which is just a string. > > b) NH is designed to apply this HQL to a database, by first converting > > to ANTLR > > c) I want to apply the HQL to an in-memory collection instead > > d) so, I could use the LINQ equivalent, if it can be generated from > > the HQL > > e) since LINQ and HQL get converted to ANTLR expression, I would need > > > HQL ==> ANTLR ===> LINQ > > > f) this may be currently impossible > > > On Nov 16, 11:12 am, Stefan Wenig <[email protected]> wrote: > > > > You're right, I skipped a step. I once asked steve strong whether he > > > could emit the HQL as a string for diagnostics. He said: easily. (much > > > easier than serializing and deserializing LINQ in any case...) > > > > but anyway, I digress. > > > > On 15 Nov., 11:55, Stefan Wenig <[email protected]> wrote: > > > > > BTW, internally, LINQ is converted to HQL. There might be a way to > > > > extract, save and execute this HQL. > > > > > On 13 Nov., 20:06, Jorge <[email protected]> wrote: > > > > > > yeah, I guess I will store a linq query along with the HQL. > > > > > Problem is, LINQ cannot be serialized to disk, while HQL can. > > > > > So, if HQL could be converted to LINQ, then this would be the nicest > > > > > solution. > > > > > > On Nov 13, 8:09 am, Jason Meckley <[email protected]> wrote: > > > > > > > that would be linq then :) > > > > > > > On Nov 12, 8:22 pm, Jorge <[email protected]> wrote: > > > > > > > > Hello! > > > > > > > Is it possible to take an HQL query and apply it to a collection > > > > > > > of > > > > > > > entities in memory? > > > > > > > Something similar to LINQ? > > > > > > > > Thanks! > > > > > > > Jorge- Zitierten Text ausblenden - > > > > > > - Zitierten Text anzeigen -- Zitierten Text ausblenden - > > > > > - Zitierten Text anzeigen -- Zitierten Text ausblenden - > > > - Zitierten Text anzeigen - > > -- You received this message because you are subscribed to the Google Groups "nhusers" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/nhusers?hl=en.
