Package io.trino.parquet.reader.decoders

Class ValueDecoders

java.lang.Object

io.trino.parquet.reader.decoders.ValueDecoders

public final class ValueDecoders
extends Object

This class provides static API for creating value decoders for given fields and encodings. If no suitable decoder is found the Apache Parquet fallback is used. Not all types are supported since this class is at this point used only by flat readers

This class is to replace most of the logic contained in ParquetEncoding enum

Method Summary

Modifier and Type	Method	Description
static ValueDecoder<BinaryBuffer>	getBinaryDecoder(ParquetEncoding encoding, PrimitiveField field)
static ValueDecoder<byte[]>	getBooleanDecoder(ParquetEncoding encoding, PrimitiveField field)
static ValueDecoder<BinaryBuffer>	getBoundedVarcharBinaryDecoder(ParquetEncoding encoding, PrimitiveField field)
static ValueDecoder<byte[]>	getByteDecoder(ParquetEncoding encoding, PrimitiveField field)
static ValueDecoder<BinaryBuffer>	getCharBinaryDecoder(ParquetEncoding encoding, PrimitiveField field)
static <T> DictionaryDecoder<T>	getDictionaryDecoder(DictionaryPage dictionaryPage, ColumnAdapter<T> columnAdapter, ValueDecoder<T> plainValuesDecoder, boolean isNonNull)
static ValueDecoder<long[]>	getDoubleDecoder(ParquetEncoding encoding, PrimitiveField field)
static ValueDecoder<BinaryBuffer>	getFixedWidthBinaryDecoder(ParquetEncoding encoding, PrimitiveField field)
static ValueDecoder<long[]>	getFixedWidthLongDecimalDecoder(ParquetEncoding encoding, PrimitiveField field)
static ValueDecoder<long[]>	getFixedWidthShortDecimalDecoder(ParquetEncoding encoding, PrimitiveField field)
static ValueDecoder<int[]>	getInt32Decoder(ParquetEncoding encoding, PrimitiveField field)
static ValueDecoder<Int96ColumnAdapter.Int96Buffer>	getInt96Decoder(ParquetEncoding encoding, PrimitiveField field)
static ValueDecoder<int[]>	getIntDecoder(ParquetEncoding encoding, PrimitiveField field)
static ValueDecoder<long[]>	getLongDecimalDecoder(ParquetEncoding encoding, PrimitiveField field)
static ValueDecoder<long[]>	getLongDecoder(ParquetEncoding encoding, PrimitiveField field)
static ValueDecoder<int[]>	getRealDecoder(ParquetEncoding encoding, PrimitiveField field)
static ValueDecoder<long[]>	getShortDecimalDecoder(ParquetEncoding encoding, PrimitiveField field)
static ValueDecoder<short[]>	getShortDecoder(ParquetEncoding encoding, PrimitiveField field)
static ValueDecoder<long[]>	getUuidDecoder(ParquetEncoding encoding, PrimitiveField field)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

getDoubleDecoder

public static ValueDecoder<long[]> getDoubleDecoder(ParquetEncoding encoding,
 PrimitiveField field)

getRealDecoder

public static ValueDecoder<int[]> getRealDecoder(ParquetEncoding encoding,
 PrimitiveField field)

getShortDecimalDecoder

public static ValueDecoder<long[]> getShortDecimalDecoder(ParquetEncoding encoding,
 PrimitiveField field)

getLongDecimalDecoder

public static ValueDecoder<long[]> getLongDecimalDecoder(ParquetEncoding encoding,
 PrimitiveField field)

getUuidDecoder

public static ValueDecoder<long[]> getUuidDecoder(ParquetEncoding encoding,
 PrimitiveField field)

getLongDecoder

public static ValueDecoder<long[]> getLongDecoder(ParquetEncoding encoding,
 PrimitiveField field)

getIntDecoder

public static ValueDecoder<int[]> getIntDecoder(ParquetEncoding encoding,
 PrimitiveField field)

getShortDecoder

public static ValueDecoder<short[]> getShortDecoder(ParquetEncoding encoding,
 PrimitiveField field)

getByteDecoder

public static ValueDecoder<byte[]> getByteDecoder(ParquetEncoding encoding,
 PrimitiveField field)

getBooleanDecoder

public static ValueDecoder<byte[]> getBooleanDecoder(ParquetEncoding encoding,
 PrimitiveField field)

getInt96Decoder

public static ValueDecoder<Int96ColumnAdapter.Int96Buffer> getInt96Decoder(ParquetEncoding encoding,
 PrimitiveField field)

getFixedWidthShortDecimalDecoder

public static ValueDecoder<long[]> getFixedWidthShortDecimalDecoder(ParquetEncoding encoding,
 PrimitiveField field)

getFixedWidthLongDecimalDecoder

public static ValueDecoder<long[]> getFixedWidthLongDecimalDecoder(ParquetEncoding encoding,
 PrimitiveField field)

getFixedWidthBinaryDecoder

public static ValueDecoder<BinaryBuffer> getFixedWidthBinaryDecoder(ParquetEncoding encoding,
 PrimitiveField field)

getBoundedVarcharBinaryDecoder

public static ValueDecoder<BinaryBuffer> getBoundedVarcharBinaryDecoder(ParquetEncoding encoding,
 PrimitiveField field)

getCharBinaryDecoder

public static ValueDecoder<BinaryBuffer> getCharBinaryDecoder(ParquetEncoding encoding,
 PrimitiveField field)

getBinaryDecoder

public static ValueDecoder<BinaryBuffer> getBinaryDecoder(ParquetEncoding encoding,
 PrimitiveField field)

getDictionaryDecoder

public static <T> DictionaryDecoder<T> getDictionaryDecoder(DictionaryPage dictionaryPage,
 ColumnAdapter<T> columnAdapter,
 ValueDecoder<T> plainValuesDecoder,
 boolean isNonNull)

getInt32Decoder

public static ValueDecoder<int[]> getInt32Decoder(ParquetEncoding encoding,
 PrimitiveField field)