Github user chunhui-shi commented on a diff in the pull request:
https://github.com/apache/drill/pull/654#discussion_r91153138
--- Diff:
contrib/storage-hive/core/src/test/java/org/apache/drill/exec/store/hive/schema/TestColumnListCache.java
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@@ -0,0 +1,78 @@
+/*
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Could you add a unit test to verify when there are two kind (or more) of
columns in e.g. 10 partitions, the physical plan text has only two copies of
columns?
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