tree 118e564a573cc92aec86e038abd38054e0d7dcd4
parent 71d2825cd66591cd7f15f15fa74b0f000a5c2590
author Hyunsik Choi <hyunsik@apache.org> 1461184632 -0700
committer Hyunsik Choi <hyunsik@apache.org> 1461184632 -0700

TAJO-2108: Refactor Schema to be immutable.

Closes #1000