TAJO-496: java.lang.NoSuchFieldError: IS_SECURITY_ENABLED when debuggin tajo. (Min Zhou via hyunsik)
Fixed some bugs.
Fixed many bugs.
Fixed many bugs.
Merge branch 'master' of https://git-wip-us.apache.org/repos/asf/incubator-tajo into LogicalPlanRefactor
Fixed many bugs
Temporal work.