zabetak commented on code in PR #6315:
URL: https://github.com/apache/hive/pull/6315#discussion_r2829398285
##########
ql/src/java/org/apache/hadoop/hive/ql/optimizer/calcite/HiveRelOptUtil.java:
##########
@@ -1107,7 +1107,14 @@ public static List<RelFieldCollation>
getNewRelFieldCollations(
Set<Integer> needed = new HashSet<>();
for (RelFieldCollation fc : sortCollation.getFieldCollations()) {
needed.add(fc.getFieldIndex());
- final RexNode node =
project.getProjects().get(map.getTarget(fc.getFieldIndex()));
+ int target = map.getTargetOpt(fc.getFieldIndex());
+ if (target == -1) {
+ // If there is no mapping for this field, we cannot push down the sort
+ LOG.debug("Missing target mapping for field index: {}. Cannot apply " +
+ "HiveProjectSort[Exchange]TransposeRule", fc.getFieldIndex());
Review Comment:
Change the following line in data/conf/hive-log4j2.properties and see what
it gives:
```
logger.CBORuleLogger.level = DEBUG
```
the output is pretty detailed and can become even more verbose by enabling
the `FULL_PLAN` marker
```
logger.CBORuleLogger.filter.marker.onMatch = ACCEPT
```
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