Affects Version/s: None
Fix Version/s: None
ql/src/java/org/apache/hadoop/hive/ql/optimizer/GenMRProcContext.java:105 can you add some comments here ?
This is not really the top operators - this contains the list of intermediate tables also. This code is difficult to debug later on, so more comments would be helpful
Look at union22.q.out.
map-join followed by union, an extra stage is introduced.
We dont have to optimize this - just wanted to make sure it is intentional.
1 general comment about the new test union26.q -
Reduce the test output, I mean, you dont need to load all 500 rows for this test.
It makes the test output really difficult to review.
ql/src/java/org/apache/hadoop/hive/ql/optimizer/GenMRUnion1.java:245 remove this comment