icexelloss commented on code in PR #34627:
URL: https://github.com/apache/arrow/pull/34627#discussion_r1151911335
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cpp/src/arrow/engine/substrait/relation_internal.h:
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@@ -30,6 +30,12 @@
#include "substrait/algebra.pb.h" // IWYU pragma: export
namespace arrow {
+namespace compute {
Review Comment:
Why do we need forward declaration instead of just importing it?
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