rok commented on code in PR #14341:
URL: https://github.com/apache/arrow/pull/14341#discussion_r1162196583
##########
cpp/src/parquet/encoding.cc:
##########
@@ -3196,6 +3469,43 @@ class DeltaByteArrayDecoder : public DecoderImpl,
std::shared_ptr<ResizableBuffer> buffered_data_;
};
+class DeltaByteArrayDecoder : public DeltaByteArrayDecoderImpl<ByteArrayType> {
+ public:
+ using Base = DeltaByteArrayDecoderImpl<ByteArrayType>;
+ using Base::DeltaByteArrayDecoderImpl;
+
+ int Decode(ByteArray* buffer, int max_values) override {
+ return GetInternal(buffer, max_values);
+ }
+};
+
+class DeltaByteArrayFLBADecoder : public DeltaByteArrayDecoderImpl<FLBAType>,
+ virtual public FLBADecoder {
+ public:
+ using Base = DeltaByteArrayDecoderImpl<FLBAType>;
+ using Base::DeltaByteArrayDecoderImpl;
+
+ int Decode(ByteArray* buffer, int max_values) {
+ return GetInternal(buffer, max_values);
+ }
+ int Decode(FixedLenByteArray* buffer, int max_values) override {
+ int decoded_values_size = max_values;
+ if (MultiplyWithOverflow(decoded_values_size,
+ descr_->type_length() * sizeof(ByteArray),
+ &decoded_values_size)) {
+ throw ParquetException("excess expansion in DELTA_LENGTH_BYTE_ARRAY");
+ }
+ std::vector<uint8_t> decode_values(decoded_values_size);
Review Comment:
Switched to:
```cpp
ArrowPoolVector<uint8_t> decode_values(decoded_values_size,
::arrow::stl::allocator<uint8_t>(pool_));
```
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