Re: System Columns

RelDataType.isNullable() returns true if and only if the type is optional. > On Feb 22, 2016, at 7:28 PM, Homer wrote: > > Julian, > > Thanks for the quick response. > > Sorry but I don't seem to see how I make the column optional. I am looking > at RelDataType

Re: Materialized view rewriting

I expected as much re: code documentation. Totally understandable, but I figured it couldn't hurt to check. As for Cassandra and materialized views, that's exactly what I was thinking and the reason I opened the issue about updates to support Cassandra 3.x :) Calcite's automatic rewriting seems

Re: Materialized view rewriting

By the way, interesting that you are interested in Cassandra and materialized views. Cassandra announced materialized view support recently[1] but they solved only half of a problem (not an insignificant half, I hasten to add), namely materialized view maintenance. They don't transparently

Re: Materialized view rewriting

As is typical for complex pieces of code like this, the documentation is in the code (and the unit test). It's probably not what you wanted to hear, but the code mutates quite fast and so if we'd written a design doc a few months ago it would be partially inaccurate. I, Maryann Xue and Amogh

Materialized view rewriting

Is there any documentation anywhere on how the current implementation of query rewriting for materialized views work? Mostly I'm referring to MaterializedViewSubstitutionVisitor. There's a lot of code to digest with not a lot of documentation and it would be helpful to have a reference to refer.

Re: HepPlanner: Optimal Plan Generation

Hi Jesús, Thank you very much for the response, I will check this out. Best, Victor On Tue, Feb 23, 2016 at 2:27 PM, Jesus Camacho Rodriguez < jcamachorodrig...@hortonworks.com> wrote: > Hi Victor, > > The time taken to generate the optimize plan will depend on the size of > the plan and the

Re: GSoC 2016

I think both ideas are good to benefit from GSoC. In particular, I proposed Piglet because it can give us a good baseline to test different optimization techniques in the presence of reutilization of intermediary results i.e. Spool operators. As I am more familiar with Pig, I could create an