pitrou commented on code in PR #45612:
URL: https://github.com/apache/arrow/pull/45612#discussion_r1968056896
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cpp/src/arrow/acero/swiss_join_internal.h:
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@@ -604,6 +609,16 @@ class SwissTableForJoinBuild {
MemoryPool* pool_;
int64_t hardware_flags_;
+ // One per batch.
+ //
+ // Informations like hashes and partitions of each batch.
+ //
+ struct BatchState {
+ std::vector<uint32_t> hashes;
+ std::vector<uint16_t> prtn_ranges;
+ std::vector<uint16_t> prtn_row_ids;
Review Comment:
Are these one value per row?
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