justinli500 commented on code in PR #49855:
URL: https://github.com/apache/arrow/pull/49855#discussion_r4520949714
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cpp/src/parquet/arrow/reader.cc:
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@@ -1325,10 +1336,27 @@
FileReaderImpl::GetRecordBatchGenerator(std::shared_ptr<FileReader> reader,
reader_properties_.cache_options());
END_PARQUET_CATCH_EXCEPTIONS
}
+ std::vector<int64_t> evict_before_offsets;
+ if (reader_properties_.pre_buffer() &&
reader_properties_.auto_evict_read_cache() &&
+ !column_indices.empty() && !row_group_indices.empty()) {
+ const int64_t kNoMoreRanges = std::numeric_limits<int64_t>::max();
+ evict_before_offsets.resize(row_group_indices.size() + 1, kNoMoreRanges);
+ for (int64_t i = static_cast<int64_t>(row_group_indices.size()) - 1; i >=
0; --i) {
+ ARROW_ASSIGN_OR_RAISE(
+ auto ranges,
reader_->GetReadRanges({row_group_indices[static_cast<size_t>(i)]},
Review Comment:
Sounds good, I kept it as-is!
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