Package org.apache.orc.impl

Class TreeReaderFactory.NullTreeReader

java.lang.Object

org.apache.orc.impl.TreeReaderFactory.TreeReader

org.apache.orc.impl.TreeReaderFactory.NullTreeReader

All Implemented Interfaces:

TypeReader

Enclosing class:

TreeReaderFactory

public static class TreeReaderFactory.NullTreeReader
extends TreeReaderFactory.TreeReader

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.orc.impl.reader.tree.TypeReader

TypeReader.ReaderCategory, TypeReader.ReadPhase

Field Summary

Fields inherited from class org.apache.orc.impl.TreeReaderFactory.TreeReader

columnId, context, present, readerCategory

Constructor Summary

Constructors

Constructor	Description
NullTreeReader(int columnId, TreeReaderFactory.Context context)

Method Summary

Modifier and Type	Method	Description
void	nextVector(org.apache.hadoop.hive.ql.exec.vector.ColumnVector vector, boolean[] isNull, int size, org.apache.hadoop.hive.ql.io.filter.FilterContext filterContext, TypeReader.ReadPhase readPhase)	Populates the isNull vector array in the previousVector object based on the present stream values.
void	seek(PositionProvider[] position, TypeReader.ReadPhase readPhase)	Seek to the given position.
void	seek(PositionProvider position, TypeReader.ReadPhase readPhase)
void	skipRows(long rows, TypeReader.ReadPhase readPhase)
void	startStripe(StripePlanner planner, TypeReader.ReadPhase readPhase)

Methods inherited from class org.apache.orc.impl.TreeReaderFactory.TreeReader

checkEncoding, countNonNullRowsInRange, countNonNulls, createIntegerReader, getColumnId, getPresent, getReaderCategory

Methods inherited from class java.lang.Object

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

Constructor Details

NullTreeReader

public NullTreeReader(int columnId,
 TreeReaderFactory.Context context)
               throws IOException

Throws:

IOException

Method Details

startStripe

public void startStripe(StripePlanner planner,
 TypeReader.ReadPhase readPhase)

Specified by:

startStripe in interface TypeReader

Overrides:

startStripe in class TreeReaderFactory.TreeReader

skipRows

public void skipRows(long rows,
 TypeReader.ReadPhase readPhase)

seek

public void seek(PositionProvider position,
 TypeReader.ReadPhase readPhase)

Specified by:

seek in interface TypeReader

Overrides:

seek in class TreeReaderFactory.TreeReader

seek

public void seek(PositionProvider[] position,
 TypeReader.ReadPhase readPhase)

Description copied from class: TreeReaderFactory.TreeReader

Seek to the given position.

Specified by:

seek in interface TypeReader

Overrides:

seek in class TreeReaderFactory.TreeReader

Parameters:

position - the indexes loaded from the file

readPhase - the current readPhase

nextVector

public void nextVector(org.apache.hadoop.hive.ql.exec.vector.ColumnVector vector,
 boolean[] isNull,
 int size,
 org.apache.hadoop.hive.ql.io.filter.FilterContext filterContext,
 TypeReader.ReadPhase readPhase)

Description copied from class: TreeReaderFactory.TreeReader

Populates the isNull vector array in the previousVector object based on the present stream values. This function is called from all the child readers, and they all set the values based on isNull field value.

Specified by:

nextVector in interface TypeReader

Overrides:

nextVector in class TreeReaderFactory.TreeReader

Parameters:

vector - The columnVector object whose isNull value is populated

isNull - Whether the each value was null at a higher level. If isNull is null, all values are non-null.

size - Size of the column vector

filterContext - the information about the rows that were selected by the filter.

readPhase - The read level