Hi Tero, there was some discussion about snowflake schema in the mailing list before, like this <https://mail-archives.apache.org/mod_mbox/kylin-dev/201504.mbox/%3ccahrce1ngiggi82udtaeyeosep1kjkserrproqfowh0jz5k_...@mail.gmail.com%3E>; but it is still not on kylin's roadmap; the main reason is we don't see many such cases, or they can be convert to star schema; If you can share some M-to-N and snowflake scenario, that would help.
2015-09-29 4:15 GMT+08:00 Tero Paananen <[email protected]>: > re: https://issues.apache.org/jira/browse/KYLIN-1049 > > I just created this ticket. > > We've been evaluating several OLAP on Hadoop type tools for some time, > and more or less found that very few tools support many-to-many > relationships either at all or the support is buggy. Snowflake schema > support is a little bit more common. > > Our data model(s) is such that it requires snowflake schema and > many-to-many relationship support. We simply can not use OLAP tools > that have no support for it. > > There's a possibility we could implement this on our own, but that's > obviously depending on all kinds of things some of which aren't under > my control. Even so, we'd need some help at the very least to get > started. > > To that end I was hoping I could discuss what it would take to > implement this with someone who does and whether this is something > that's already on your roadmap. > > -TPP >
