com.facebook.presto.parquet

Class DataPage

java.lang.Object

com.facebook.presto.parquet.Page

com.facebook.presto.parquet.DataPage

Direct Known Subclasses:

DataPageV1, DataPageV2

public abstract class DataPage
extends Page

Field Summary

Fields

Modifier and Type	Field and Description
protected int	valueCount

Fields inherited from class com.facebook.presto.parquet.Page

compressedSize, uncompressedSize

Constructor Summary

Constructors

Constructor and Description
DataPage(int compressedSize, int uncompressedSize, int valueCount)

Method Summary

Modifier and Type	Method and Description
Optional<Long>	getFirstRowIndex()
int	getValueCount()

Methods inherited from class com.facebook.presto.parquet.Page

getCompressedSize, getRetainedSizeInBytes, getSlice, getUncompressedSize

Methods inherited from class java.lang.Object

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

Field Detail

valueCount

protected final int valueCount

Constructor Detail

DataPage

public DataPage(int compressedSize,
                int uncompressedSize,
                int valueCount)

Method Detail

getFirstRowIndex

public Optional<Long> getFirstRowIndex()

Returns:

the index of the first row in this page if the related data is available (the optional column-index contains this value)

getValueCount

public int getValueCount()