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[C++][Parquet] remove useless template parameter of DeltaLengthByteArrayEncoder #43249

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[C++][Parquet] remove useless template parameter of DeltaLengthByteArrayEncoder#43249
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Component: C++Component: ParquetType: enhancement
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18.0.0
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opened on Jul 15, 2024

Describe the enhancement requested

arrow/cpp/src/parquet/encoding.cc

Lines 2735 to 2737 in 0372617

template <typename DType>
class DeltaLengthByteArrayEncoder : public EncoderImpl,
virtual public TypedEncoder<ByteArrayType> {

It seems that the template parameter DType is never used. In addition, only ByteArray could be encoded with DeltaLengthByteArrayEncoder. So maybe it can be removed.

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C++, Parquet

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