pitrou commented on code in PR #14341:
URL: https://github.com/apache/arrow/pull/14341#discussion_r1205509102
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cpp/src/parquet/encoding.cc:
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@@ -3200,6 +3461,39 @@ 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;
+ using Base::pool_;
+
+ int Decode(FixedLenByteArray* buffer, int max_values) override {
+ // GetInternal currently only support ByteArray.
+ std::vector<ByteArray> decode_byte_array(max_values);
Review Comment:
A pity that this does a potentially large temporary allocation, but that's
probably the easiest way given how decoding is currently structured.
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