Github user jihoonson commented on the pull request:
https://github.com/apache/tajo/pull/749#issuecomment-138809217
This patch is only to test catalog.
I've added two more unit tests, i.e.,
```TestCatalogAgainstCaseSensitivity``` and ```TestCatalogExceptions```. As
shown in those names, one of them is to test catalog functionalities against
text case sensitivity and the other is to test if catalog throws exceptions
properly.
I've verified every unit test of ```tajo-catalog-server``` with pgsql,
mysql, mariadb, and derby.
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