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From Todd Lipcon <t...@cloudera.com>
Subject Re: No order by in kudu java api
Date Wed, 31 Aug 2016 17:06:12 GMT
Hi Amit,

That's correct, there is no "order by" support in the Java API, because
this is an arbitrarily complex operation. Imagine a table with a trillion
rows, and asking for "order by" from a Java client. It would have to either
download and sort the entire table on your client node (which is
infeasible) or would have to somehow ask the servers to perform a huge
shuffle and sort, which isn't something Kudu's designed to do.

The recommendation is:
- if you're just needing to sort small sets of rows, then grab the whole
result set and use a normal Java-based sort (Collections.sort)
- if you're needing to sort a large number of rows, use something like
Impala or Spark SQL to perform the sort.


On Wed, Aug 31, 2016 at 8:06 AM, Amit Adhau <amit.adhau@globant.com> wrote:

> Hi Kudu Team,
> Using Java Kudu API, we want to sort the data on kudu table based on table
> column, but we have not found any option in API for the same.
> Can you please help us on the same.
> --
> Thanks & Regards,
> *Amit Adhau* | Data Architect
> *GLOBANT* | IND:+91 9821518132
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Todd Lipcon
Software Engineer, Cloudera

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