ZhangHuiGui commented on code in PR #41975:
URL: https://github.com/apache/arrow/pull/41975#discussion_r1637530225
##########
cpp/src/arrow/compute/exec.cc:
##########
@@ -498,15 +510,36 @@ struct NullGeneralization {
return PERHAPS_NULL;
}
+ static type Get(const ChunkedArray& chunk_array) {
+ if (chunk_array.num_chunks() == 0 ||
+ (chunk_array.null_count() == chunk_array.length())) {
+ return ALL_NULL;
+ }
+
+ type null_gen = ALL_NULL;
+ int chunk_idx = 0;
+ while (chunk_idx < chunk_array.num_chunks()) {
+ ExecValue value;
+ const ArrayData* curr_chunk = chunk_array.chunk(chunk_idx)->data().get();
+ value.SetArray(*curr_chunk);
+ null_gen = static_cast<type>((null_gen & Get(value)));
Review Comment:
I've thought about this, you're right, we shouldn't rely on `&`, it's too
tricky and there will be potential scalability issues.
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