Github user blrunner commented on the pull request:
https://github.com/apache/tajo/pull/624#issuecomment-127042279
I implemented CatalogStore::getPartitionsByDirectSql which execute a select
statement to CatalogStore for searching right partition directories. But
current tajo testing cluster use MemStore for default CatalogStore and I
couldn't execute the select statement because MemStore just retain all catalog
informations to HashMap. If you want to verify this patch, you can test as
following:
```
mvn clean install -Pparallel-test -DLOG_LEVEL=WARN -Dmaven.fork.count=2
-Dtajo.catalog.store.class=org.apache.tajo.catalog.store.DerbyStore
```
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