mapleFU commented on code in PR #39807:
URL: https://github.com/apache/arrow/pull/39807#discussion_r1532147695
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cpp/src/arrow/io/compressed.cc:
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@@ -284,8 +308,12 @@ class CompressedInputStream::Impl {
int64_t decompress_size = kDecompressSize;
while (true) {
- ARROW_ASSIGN_OR_RAISE(decompressed_,
- AllocateResizableBuffer(decompress_size, pool_));
+ if (decompressed_ == nullptr) {
+ ARROW_ASSIGN_OR_RAISE(decompressed_,
+ AllocateResizableBuffer(decompress_size, pool_));
+ } else {
+ RETURN_NOT_OK(decompressed_->Resize(decompress_size,
/*shrink_to_fit=*/false));
Review Comment:
Oh mybad, I'm wrong here. `decompressed_` is likely to have has same
capacity, but not same-sized
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