Github user jinossy commented on a diff in the pull request:
https://github.com/apache/tajo/pull/838#discussion_r43707748
--- Diff:
tajo-core/src/main/java/org/apache/tajo/engine/planner/physical/DistinctGroupbySortAggregationExec.java
---
@@ -172,6 +168,13 @@ public void close() throws IOException {
@Override
public void init() throws IOException {
+ super.init();
+
+ if (aggregateExecs != null) {
--- End diff --
@charsyam
I refer to close() but It seems to the unnecessary checking. Are you
working on this operator ?
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