org.apache.hadoop.hive.ql.exec.vector

Class VectorExtractRow

java.lang.Object

org.apache.hadoop.hive.ql.exec.vector.VectorExtractRow

public class VectorExtractRow
extends Object

This class extracts specified VectorizedRowBatch row columns into writables. The caller provides the data types and projection column numbers of a subset of the columns to extract.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	VectorExtractRow.OutputType

Constructor Summary

Constructors

Constructor and Description
VectorExtractRow()

Method Summary

Modifier and Type	Method and Description
Function<Integer,Function<Integer,Object>>	accessor(VectorizedRowBatch batch) Returns an accessor function construct that can return data from a VRB batch instance.
void	extractRow(VectorizedRowBatch batch, int batchIndex, Object[] objects) Extract an row object from a VectorizedRowBatch at batchIndex.
void	extractRow(VectorizedRowBatch batch, int batchIndex, Object[] objects, VectorExtractRow.OutputType outputType) Extract an row object from a VectorizedRowBatch at batchIndex.
Object	extractRowColumn(ColumnVector colVector, TypeInfo typeInfo, ObjectInspector objectInspector, int batchIndex)
Object	extractRowColumn(ColumnVector colVector, TypeInfo typeInfo, ObjectInspector objectInspector, int batchIndex, VectorExtractRow.OutputType outputType)
int	getCount()
void	init(StructObjectInspector structObjectInspector, List<Integer> projectedColumns)
void	init(TypeInfo[] typeInfos)
void	init(TypeInfo[] typeInfos, int[] projectedColumns)

Methods inherited from class java.lang.Object

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

Constructor Detail

VectorExtractRow

public VectorExtractRow()

Method Detail

init

public void init(StructObjectInspector structObjectInspector,
                 List<Integer> projectedColumns)
          throws HiveException

Throws:

HiveException

init

public void init(TypeInfo[] typeInfos,
                 int[] projectedColumns)
          throws HiveException

Throws:

HiveException

init

public void init(TypeInfo[] typeInfos)
          throws HiveException

Throws:

HiveException

getCount

public int getCount()

extractRowColumn

public Object extractRowColumn(ColumnVector colVector,
                               TypeInfo typeInfo,
                               ObjectInspector objectInspector,
                               int batchIndex)

extractRowColumn

public Object extractRowColumn(ColumnVector colVector,
                               TypeInfo typeInfo,
                               ObjectInspector objectInspector,
                               int batchIndex,
                               VectorExtractRow.OutputType outputType)

extractRow

public void extractRow(VectorizedRowBatch batch,
                       int batchIndex,
                       Object[] objects)

Extract an row object from a VectorizedRowBatch at batchIndex.

Parameters:

batch - VRB instance to lookup the row from

batchIndex - index of the row within this batch

objects - output

extractRow

public void extractRow(VectorizedRowBatch batch,
                       int batchIndex,
                       Object[] objects,
                       VectorExtractRow.OutputType outputType)

Extract an row object from a VectorizedRowBatch at batchIndex.

Parameters:

batch - VRB instance to lookup the row from

batchIndex - index of the row within this batch

objects - output

accessor

public Function<Integer,Function<Integer,Object>> accessor(VectorizedRowBatch batch)

Returns an accessor function construct that can return data from a VRB batch instance. The outer function would take a batch index to select the row inside the batch, and an inner function would select the data/item inside the row based on the provided row index.

Parameters:

batch - VRB instance

Returns:

function construct