Others may correct me, but I don't believe this is currently supported. We may not be able to support all of Linq4j, but I'd imagine a usable subset would be possible. If you're interested in implementing, that would be great! Either way, I'd suggest you file a JIRA case for this. Thanks!
-- Michael Mior mm...@apache.org 2018-03-14 2:27 GMT-04:00 Walaa Eldin Moustafa <wa.moust...@gmail.com>: > Does Calcite currently support converting a Linq4j expression to relational > algebra? After a quick look at the code, it seems that it does not, so if > not, do you think it is feasible? On one hand, the Linq4j expressions are > very similar to the RelBuilder structure, (e.g., .groupBy(), .orderBy(), > etc). On the other hand, the extensive use of functions (e.g., selectors) > and in-memory data-types may be difficult to implement as a RelBuilder. The > use case I have in mind is to have Linq4j as another top-level interface > (that is interpretable to relational algebra) to Calcite in addition to SQL > and Piglet. > > Thanks, > Walaa. >
