mapleFU commented on code in PR #47185:
URL: https://github.com/apache/arrow/pull/47185#discussion_r2300868963
##########
cpp/src/arrow/array/builder_binary.cc:
##########
@@ -162,7 +164,13 @@ void FixedSizeBinaryBuilder::Reset() {
Status FixedSizeBinaryBuilder::Resize(int64_t capacity) {
RETURN_NOT_OK(CheckCapacity(capacity));
- RETURN_NOT_OK(byte_builder_.Resize(capacity * byte_width_));
+ int64_t dest_capacity_bytes;
Review Comment:
Oh, it's because `ReserveValues` is called above this:
```c++
void ReserveValues(int64_t extra_values) override {
ARROW_DCHECK(!uses_values_);
TypedRecordReader::ReserveValues(extra_values);
PARQUET_THROW_NOT_OK(array_builder_.Reserve(extra_values));
}
```
`!uses_values_` is only called by ByteArray and FLBA, so other types doesn't
touches this case...
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