zabetak commented on a change in pull request #1357:
URL: https://github.com/apache/hive/pull/1357#discussion_r466296959
##########
File path:
ql/src/java/org/apache/hadoop/hive/ql/optimizer/calcite/HiveRelDistribution.java
##########
@@ -81,8 +84,16 @@ public RelDistribution apply(TargetMapping mapping) {
return this;
}
List<Integer> newKeys = new ArrayList<>(keys.size());
+
+ // Instead of using a HashMap for lookup
newKeys.add(mapping.getTargetOpt(key)); should be called but not all the
+ // mapping supports that. See HIVE-23963. Replace this when this is fixed
in calcite.
Review comment:
If it is meant to be fixed in Calcite then we should create a JIRA and
add an entry in `org.apache.hadoop.hive.ql.optimizer.calcite.Bug`. We could
even skip the JIRA creation and move this comment in `Bug` as
`CALCITE-X0000_fixed` or something similar.
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