pitrou commented on code in PR #13364:
URL: https://github.com/apache/arrow/pull/13364#discussion_r896672374
##########
cpp/src/arrow/compute/exec.h:
##########
@@ -252,6 +254,192 @@ struct ARROW_EXPORT ExecBatch {
inline bool operator==(const ExecBatch& l, const ExecBatch& r) { return
l.Equals(r); }
inline bool operator!=(const ExecBatch& l, const ExecBatch& r) { return
!l.Equals(r); }
+struct ExecValue {
+ enum Kind { ARRAY, SCALAR };
+ Kind kind = ARRAY;
+ ArraySpan array;
+ const Scalar* scalar;
Review Comment:
Also, can we default-initialize this field to null?
```c++
const Scalar* scalar = NULLPTR;
```
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