Not sure if everyone knows this, but it looks like Kylin.io [1] which was opensourced by Ebay is using the optiq parser. They have some slides explaining how they built it [2].
[1] http://kylin.io/ [2] http://www.slideshare.net/XuJiang2/kylin-hadoop-olap-engine Pretty neat stuff. -Dan -- Dan Di Spaltro
