xiedeyantu commented on code in PR #4897:
URL: https://github.com/apache/calcite/pull/4897#discussion_r3169133861
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core/src/main/java/org/apache/calcite/rel/rules/IntersectToDistinctRule.java:
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@@ -206,6 +230,9 @@ public void onMatchAggregatePushdown(RelOptRuleCall call) {
// Project all but the last field
relBuilder.project(Util.skipLast(relBuilder.fields()));
+ // ensure the nullabilities of columns in the new relation match those of
the input relation
+ relBuilder.convert(intersect.getRowType(), false);
Review Comment:
I agree, it would be safer that way.
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