pitrou commented on a change in pull request #7887:
URL: https://github.com/apache/arrow/pull/7887#discussion_r470062976
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File path: cpp/src/arrow/array/builder_base.h
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@@ -98,6 +98,9 @@ class ARROW_EXPORT ArrayBuilder {
virtual Status AppendNull() = 0;
virtual Status AppendNulls(int64_t length) = 0;
+ virtual Status AppendEmpty() { return AppendNull(); }
Review comment:
Well, we'd like AppendEmpty to precisely append a (arbitrary but
defined) non-null value, so this is not correct.
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