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Ran 04 Oct 2017 03:27AM UTC

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Committed 04 Oct 2017 03:06AM UTC coverage: 41.148% (+0.3%) from 40.889%

Job # 650.2

Build Type

push

travis-ci

Committed by Takuya Kitazawa

Commit Message

[HIVEMALL-146] Yet another UDF to generate n-grams

## What changes were proposed in this pull request?

Add a new UDF `to_ngrams(array<string> words, int minSize, int maxSize)` which returns list of n-grams `minSize <= n <= maxSize` for given words. This UDF can be alternative of the original Hive `ngrams` function.

## What type of PR is it?

Feature

## What is the Jira issue?

https://issues.apache.org/jira/browse/HIVEMALL-146

## How was this patch tested?

Unit test, manual tests both on EMR and local Hive

## How to use this feature?

as documented

## Checklist

(Please remove this section if not needed; check `x` for YES, blank for NO)

- [x] Did you apply source code formatter, i.e., `mvn formatter:format`, for your commit?
- [x] Did you run system tests on Hive (or Spark)?

Author: Takuya Kitazawa <k.takuti@gmail.com>

Closes #118 from takuti/HIVEMALL-146-ngrams.

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