nirandaperera commented on a change in pull request #10845:
URL: https://github.com/apache/arrow/pull/10845#discussion_r698675915
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File path: cpp/src/arrow/compute/exec/hash_join_node.cc
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@@ -39,7 +39,7 @@ Status ValidateJoinInputs(const std::shared_ptr<Schema>&
left_schema,
const std::shared_ptr<Schema>& right_schema,
const std::vector<int>& left_keys,
const std::vector<int>& right_keys) {
- if (left_keys.size() != right_keys.size()) {
+ if (left_keys.size() != right_keys.size() && left_keys.size() > 0) {
Review comment:
Sorry I missed this. I added the changes now
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