kasakrisz commented on a change in pull request #2401:
URL: https://github.com/apache/hive/pull/2401#discussion_r657780988
##########
File path:
ql/src/java/org/apache/hadoop/hive/ql/optimizer/calcite/HiveCalciteUtil.java
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@@ -1252,4 +1252,18 @@ public static ImmutableBitSet extractRefs(Aggregate
aggregate) {
}
return refs.build();
}
+
+ public static Set<RexTableInputRef> findRexTableInputRefs(RexNode rexNode) {
Review comment:
`RexUtil.gatherTableReferences` returns `Set<RelTableRef>` and not
Set<RexTableInputRef>. `RelTableRef` does not contains the index of this
InputRef in the TS schema which is required to identify if the
`RexTableInputRef` instance refers a partition column or not.
`RelOptHiveTable.getPartColInfoMap()` contains the indexes not the instances.
The RexTableInputRef index is also required by
`HiveCardinalityPreservingJoinOptimization` that is why I extarcted
`findRexTableInputRefs`.
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