rubenada commented on a change in pull request #1833: [CALCITE-3828] MergeJoin
throws NPE in case of null keys
URL: https://github.com/apache/calcite/pull/1833#discussion_r384975567
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File path:
linq4j/src/main/java/org/apache/calcite/linq4j/EnumerableDefaults.java
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@@ -3829,6 +3829,12 @@ private boolean advance() {
TInner right = rightEnumerator.current();
TKey rightKey = innerKeySelector.apply(right);
for (;;) {
+ // mergeJoin assumes inputs sorted in ascending order with nulls last,
Review comment:
@danny0405 , comment has been added in the javadoc of
EnumerableDefaults#mergeJoin and EnumerableDefaults#MergeJoinEnumerator
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