程序包 org.apache.paimon.format.parquet.reader

接口概要

接口	说明
ColumnReader<VECTOR extends org.apache.paimon.data.columnar.writable.WritableColumnVector>	Read a batch of records for a column to WritableColumnVector from parquet data file.
ParquetDataColumnReader	The interface to wrap the underlying Parquet dictionary and non dictionary encoded page reader.

类概要

类	说明
AbstractColumnReader<VECTOR extends org.apache.paimon.data.columnar.writable.WritableColumnVector>	Abstract ColumnReader.
ArrayColumnReader	Array ColumnReader.
BaseVectorizedColumnReader	It's column level Parquet reader which is used to read a batch of records for a column, part of the code is referred from Apache Hive and Apache Parquet.
BaseVectorizedColumnReader.NullIntIterator	Reading zero always.
BaseVectorizedColumnReader.RLEIntIterator	Reading int from RunLengthBitPackingHybridDecoder.
BaseVectorizedColumnReader.ValuesReaderIntIterator	Reading int from ValuesReader.
BooleanColumnReader	Boolean ColumnReader.
ByteColumnReader	Byte ColumnReader.
BytesColumnReader	Bytes ColumnReader.
DoubleColumnReader	Double ColumnReader.
FixedLenBytesColumnReader<VECTOR extends org.apache.paimon.data.columnar.writable.WritableColumnVector>	Fixed length bytes ColumnReader, just for Decimal.
FloatColumnReader	Float ColumnReader.
IntColumnReader	Int ColumnReader.
LongColumnReader	Long ColumnReader.
MapColumnReader	Map ColumnReader.
ParquetDataColumnReaderFactory	Parquet file has self-describing schema which may differ from the user required schema (e.g.
ParquetDataColumnReaderFactory.DefaultParquetDataColumnReader	The default data column reader for existing Parquet page reader which works for both dictionary or non dictionary types, Mirror from dictionary encoding path.
ParquetDataColumnReaderFactory.TypesFromInt96PageReader	The reader who reads from the underlying Timestamp value.
ParquetDecimalVector	Parquet write decimal as int32 and int64 and binary, this class wrap the real vector to provide DecimalColumnVector interface.
ParquetDictionary	Parquet dictionary.
ParquetSplitReaderUtil	Util for generating ColumnReader.
ParquetTimestampVector	Parquet write timestamp precision 0-3 as int64 mills, 4-6 as int64 micros, 7-9 as int96, this class wrap the real vector to provide TimestampColumnVector interface.
RowColumnReader	Row ColumnReader.
ShortColumnReader	Short ColumnReader.
TimestampColumnReader	Timestamp ColumnReader.