Github user blrunner commented on a diff in the pull request:
https://github.com/apache/tajo/pull/965#discussion_r55159440
--- Diff: tajo-core/src/main/java/org/apache/tajo/querymaster/Query.java ---
@@ -402,6 +403,39 @@ public QueryState getSynchronizedState() {
}
}
+ public boolean hasUnionPlan() throws Exception {
+ boolean result = false;
+
+ // During executing UNION statement or UNION ALL statement, the
terminal block doesn't have join plan and has
+ // two more child blocks. In above case, Tajo should summarize result
TableStats from all child stages.
+ ExecutionBlock terminalBlock = plan.getTerminalBlock();
+ terminalBlock.setPlan(terminalBlock.getPlan());
--- End diff --
I agree with you and reflected your comments.
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