wesm commented on code in PR #13364:
URL: https://github.com/apache/arrow/pull/13364#discussion_r897399548
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cpp/src/arrow/compute/exec_internal.h:
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@@ -72,6 +72,56 @@ class ARROW_EXPORT ExecBatchIterator {
int64_t max_chunksize_;
};
+/// \brief Break std::vector<Datum> into a sequence of non-owning
+/// ExecSpan for kernel execution. The lifetime of the Datum vector
+/// must be longer than the lifetime of this object
+class ARROW_EXPORT ExecSpanIterator {
+ public:
+ ExecSpanIterator() = default;
+
+ /// \brief Initialize itertor iterator and do basic argument validation
+ ///
+ /// \param[in] batch the input ExecBatch
+ /// \param[in] max_chunksize the maximum length of each ExecSpan. Depending
+ /// on the chunk layout of ChunkedArray.
+ Status Init(const ExecBatch& batch, ValueDescr::Shape output_shape =
ValueDescr::ARRAY,
+ int64_t max_chunksize = kDefaultMaxChunksize);
Review Comment:
The default here is INT64_MAX, which is to say no chunking
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