On Jun 16, 2014, at 11:18 AM, Yash Sharma <[email protected]> wrote: > @ Julian, > Drill currently uses Optiq as the SQL parser and Query Optimizer. > I wanted tips from you to start exploring Optiq optimization rules. What > could be some good places to start understanding/debugging.
The eigenbase wiki described how to write a rule. See the archived page [1]. The API has changed somewhat but it covers the concepts well. The optiq-csv tutorial [2] also describes how to write a simple rule. There are some debugging tips in the HOWTO [3]. Julian [1] http://www.hydromatic.net/wiki/HowToWriteNewOptimizerRules [2] https://github.com/julianhyde/optiq-csv/blob/master/TUTORIAL.md [3] https://github.com/julianhyde/optiq/blob/master/HOWTO.md
