org.apache.iceberg.arrow.vectorized

Class VectorizedArrowReader

java.lang.Object

org.apache.iceberg.arrow.vectorized.VectorizedArrowReader

All Implemented Interfaces:

VectorizedReader<VectorHolder>

Direct Known Subclasses:

VectorizedArrowReader.ConstantVectorReader

public class VectorizedArrowReader
extends java.lang.Object
implements VectorizedReader<VectorHolder>

VectorReader(s) that read in a batch of values into Arrow vectors. It also takes care of allocating the right kind of Arrow vectors depending on the corresponding Iceberg/Parquet data types.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	VectorizedArrowReader.ConstantVectorReader<T> A Dummy Vector Reader which doesn't actually read files, instead it returns a dummy VectorHolder which indicates the constant value which should be used for this column.

Field Summary

Fields

Modifier and Type	Field and Description
static int	DEFAULT_BATCH_SIZE

Constructor Summary

Constructors

Constructor and Description
VectorizedArrowReader(org.apache.parquet.column.ColumnDescriptor desc, Types.NestedField icebergField, org.apache.arrow.memory.BufferAllocator ra, boolean setArrowValidityVector)

Method Summary

Modifier and Type	Method and Description
void	close() Release any resources allocated.
static VectorizedArrowReader	nulls()
static VectorizedArrowReader	positions()
VectorHolder	read(VectorHolder reuse, int numValsToRead) Reads a batch of type @param <T> and of size numRows
void	setBatchSize(int batchSize)
void	setRowGroupInfo(org.apache.parquet.column.page.PageReadStore source, java.util.Map<org.apache.parquet.hadoop.metadata.ColumnPath,org.apache.parquet.hadoop.metadata.ColumnChunkMetaData> metadata, long rowPosition) Sets the row group information to be used with this reader
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_BATCH_SIZE

public static final int DEFAULT_BATCH_SIZE

See Also:

Constant Field Values

Constructor Detail

VectorizedArrowReader

public VectorizedArrowReader(org.apache.parquet.column.ColumnDescriptor desc,
                             Types.NestedField icebergField,
                             org.apache.arrow.memory.BufferAllocator ra,
                             boolean setArrowValidityVector)

Method Detail

setBatchSize

public void setBatchSize(int batchSize)

Specified by:

setBatchSize in interface VectorizedReader<VectorHolder>

read

public VectorHolder read(VectorHolder reuse,
                         int numValsToRead)

Description copied from interface: VectorizedReader

Reads a batch of type @param <T> and of size numRows

Specified by:

read in interface VectorizedReader<VectorHolder>

Parameters:

reuse - container for the last batch to be reused for next batch

numValsToRead - number of rows to read

Returns:

batch of records of type @param <T>

setRowGroupInfo

public void setRowGroupInfo(org.apache.parquet.column.page.PageReadStore source,
                            java.util.Map<org.apache.parquet.hadoop.metadata.ColumnPath,org.apache.parquet.hadoop.metadata.ColumnChunkMetaData> metadata,
                            long rowPosition)

Description copied from interface: VectorizedReader

Sets the row group information to be used with this reader

Specified by:

setRowGroupInfo in interface VectorizedReader<VectorHolder>

Parameters:

source - row group information for all the columns

metadata - map of ColumnPath -> ColumnChunkMetaData for the row group

rowPosition - the row group's row offset in the parquet file

close

public void close()

Description copied from interface: VectorizedReader

Release any resources allocated.

Specified by:

close in interface VectorizedReader<VectorHolder>

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

nulls

public static VectorizedArrowReader nulls()

positions

public static VectorizedArrowReader positions()