westonpace commented on a change in pull request #9892:
URL: https://github.com/apache/arrow/pull/9892#discussion_r608829064
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File path: cpp/src/arrow/dataset/scanner.h
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@@ -32,6 +32,7 @@
#include "arrow/memory_pool.h"
#include "arrow/type_fwd.h"
#include "arrow/util/async_generator.h"
+#include "arrow/util/thread_pool.h"
Review comment:
Well, you caught me out, they're not all named `MakeXyz` :smile:
```
auto scan_fut = CollectAsyncGenerator(std::move(scan_gen))
.Then([state, id](const RecordBatchVector& rbs) {
state->Emplace(rbs, id);
```
This call to `CollectAsyncGenerator` requires the include.
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