pitrou commented on code in PR #50269:
URL: https://github.com/apache/arrow/pull/50269#discussion_r3542422319
##########
cpp/src/arrow/util/dict_util.cc:
##########
@@ -78,5 +104,48 @@ int64_t LogicalNullCount(const ArraySpan& span) {
return LogicalNullCount<Int64Type>(span);
}
}
+
+void SetLogicalNullBits(const ArraySpan& span, uint8_t* out_bitmap, int64_t
out_offset,
+ bool set_on_null) {
+ if (span.dictionary().GetNullCount() == 0 || span.length == 0) {
Review Comment:
I think you're right, also, `dict_util::LogicalNullCount` does not account
for logical nulls in the dictionary either.
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