kasakrisz commented on code in PR #2916:
URL: https://github.com/apache/calcite/pull/2916#discussion_r976576290
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core/src/main/java/org/apache/calcite/rel/rules/PruneEmptyRules.java:
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@@ -480,9 +486,24 @@ public interface JoinLeftEmptyRuleConfig extends
PruneEmptyRule.Config {
return new PruneEmptyRule(this) {
@Override public void onMatch(RelOptRuleCall call) {
Join join = call.rel(0);
+ Values empty = call.rel(1);
+ RelNode right = call.rel(2);
+ RexBuilder rexBuilder = call.builder().getRexBuilder();
if (join.getJoinType().generatesNullsOnLeft()) {
// "select * from emp right join dept" is not necessarily empty if
Review Comment:
Updated the comment.
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