In the current implementation, boolean datum is not compatible to apache hive.
hive> select * from bool_test;
NotEval incurs NPE with boolean column
I've changed text comparison to use first byte instead of 'equals'
and the boolean text is written as 'true' or 'false'
The patch looks great for me. I've verified 'mvn clean install'.
I forgot to throw +1.
Committed to master and branch-0.2.
SUCCESS: Integrated in Tajo-trunk-postcommit #530 (See https://builds.apache.org/job/Tajo-trunk-postcommit/530/)
TAJO-270: Boolean datum compatible to apache hive. (jinho) (jinossy: https://git-wip-us.apache.org/repos/asf?p=incubator-tajo.git&a=commit&h=85cff2e7101e6e059285a80268ba2d8aaaca00ec)