abs(-1) ===> 1
abs(1) ===> 1
abs(1.0) ===> 1.0
abs(-1.0) ===> 1.0
Please review this.
until now, I know parse minus value cauese error.
(so I couldn't make minus value test.)
The patch looks good for me. Since this patch gone stale, I rebased your patch. In addition, I added additional unit tests for minus values to the updated patch.
I just committed the latest patch to the master branch. Thank you for your contribution.
SUCCESS: Integrated in Tajo-trunk-postcommit #603 (See https://builds.apache.org/job/Tajo-trunk-postcommit/603/)
TAJO-394: Implement abs function. (DaeMyung Kang via hyunsik) (hyunsik: https://git-wip-us.apache.org/repos/asf?p=incubator-tajo.git&a=commit&h=2c7f552a54080d98545bc4b3cb162b48eadcf287)