sanjibansg commented on a change in pull request #12560:
URL: https://github.com/apache/arrow/pull/12560#discussion_r822374468
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File path: cpp/src/arrow/dataset/scanner.cc
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@@ -877,6 +882,15 @@ Result<compute::ExecNode*> MakeScanNode(compute::ExecPlan*
plan,
batch->values.emplace_back(partial.fragment.index);
batch->values.emplace_back(partial.record_batch.index);
batch->values.emplace_back(partial.record_batch.last);
+
+ auto filefragment_casted = dynamic_cast<const FileFragment*>(
+ partial.fragment.value.get());
+ if (filefragment_casted != nullptr) {
+ batch->values.emplace_back(filefragment_casted->ToString());
+ } else {
+ batch->values.emplace_back("Not a file fragment");
Review comment:
The `ToString()` method will return the path if it is a `FileFragment`
or will return the `type_name` otherwise, so we may ignore doing the cast and
directly emplace back the string returned from `ToString()`
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