bkietz commented on a change in pull request #9294:
URL: https://github.com/apache/arrow/pull/9294#discussion_r571192780
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File path: cpp/src/arrow/compute/kernels/scalar_cast_boolean.cc
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@@ -50,6 +50,7 @@ struct ParseBooleanString {
std::vector<std::shared_ptr<CastFunction>> GetBooleanCasts() {
auto func = std::make_shared<CastFunction>("cast_boolean", Type::BOOL);
AddCommonCasts(Type::BOOL, boolean(), func.get());
+ AddZeroCopyCast(Type::BOOL, boolean(), boolean(), func.get());
Review comment:
It may be pointless overhead to avoid, but is there a reason identity
casting should not be supported?
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