kasakrisz commented on code in PR #4864:
URL: https://github.com/apache/hive/pull/4864#discussion_r1387684881
##########
ql/src/java/org/apache/hadoop/hive/ql/optimizer/ConvertJoinMapJoin.java:
##########
@@ -755,6 +755,14 @@ private boolean checkConvertJoinSMBJoin(JoinOperator
joinOp, OptimizeTezProcCont
LOG.debug("External table {} found in join and also could not provide
statistics - disabling SMB join.", sb);
return false;
}
+ for (Operator<?> grandParent : parentOp.getParentOperators()) {
+ if (hasMoreGBYs(grandParent, 2)) {
+ LOG.info(
+ "We cannot convert to SMB because one of the join branches has
more than one GBY in the same reducer");
Review Comment:
Done
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