felipecrv commented on code in PR #35036:
URL: https://github.com/apache/arrow/pull/35036#discussion_r1163249103
##########
cpp/src/arrow/util/ree_util.cc:
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@@ -47,6 +47,25 @@ int64_t LogicalNullCount(const ArraySpan& span) {
return null_count;
}
+template <typename RunEndCType>
+void SetLogicalNullBits(const ArraySpan& span, uint8_t* out_bitmap, int64_t
out_offset) {
+ const auto& values = ValuesArray(span);
+ const auto& values_bitmap = values.buffers[0].data;
+
+ RunEndEncodedArraySpan<RunEndCType> ree_span(span);
+ auto end = ree_span.end();
+ for (auto it = ree_span.begin(); it != end; ++it) {
+ const bool is_null =
+ values_bitmap &&
Review Comment:
you can early return if `!values_bitmap` outside the loop and remove this
pointer check from the body of the loop completely
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