save-buffer commented on code in PR #13332:
URL: https://github.com/apache/arrow/pull/13332#discussion_r892760948


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cpp/src/arrow/compute/exec/hash_join_node.cc:
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@@ -516,6 +684,125 @@ class HashJoinNode : public ExecNode {
 
   const char* kind_name() const override { return "HashJoinNode"; }
 
+  Status OnBuildSideBatch(size_t thread_index, ExecBatch batch) {
+    std::lock_guard<std::mutex> guard(build_side_mutex_);
+    accumulators_[1].InsertBatch(std::move(batch));

Review Comment:
   Done



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