GitHub user nickwallen opened a pull request:
https://github.com/apache/incubator-metron/pull/231
METRON-394 Create Stellar Date Functions to Use with Profile 'Group By'
### [METRON-394](https://issues.apache.org/jira/browse/METRON-394)
[METRON-392](https://issues.apache.org/jira/browse/METRON-392) and #230
Allows a user to optionally define a custom set of 'groupBy' expressions that
controls how Profile data is persisted. This is intended to allow for
contiguous scans when training on subsets of the data.
A common use case would be grouping the data by some calendar period, like
day of week. This would allow a contiguous scan to access all profile data, for
example, on Mondays only. The Stellar expression DAY_OF_WEEK(start) would
achieve this.
The following functions have been added for this purpose.
* WEEK_OF_MONTH
* WEEK_OF_YEAR
* DAY_OF_WEEK
* DAY_OF_MONTH
* DAY_OF_YEAR
* MONTH
* YEAR
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/nickwallen/incubator-metron METRON-394
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/incubator-metron/pull/231.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #231
----
commit 12873b151eafaa05c712efb42261fc3ca5e5bf43
Author: Nick Allen <[email protected]>
Date: 2016-08-25T13:44:37Z
METRON-394 Create Stellar Date Functions to Use with Profile 'Group By'
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