Github user hsuanyi commented on a diff in the pull request:
https://github.com/apache/drill/pull/407#discussion_r55597640
--- Diff: exec/java-exec/src/test/java/org/apache/drill/TestUnionAll.java
---
@@ -527,6 +532,52 @@ public void testUnionAllRightEmptyJson() throws
Exception {
.build().run();
}
+ @Test
+ public void testUnionAllLeftEmptyJson() throws Exception {
--- End diff --
Added a few for both union-all and union-distinct
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