org.apache.hadoop.hive.ql.metadata
Class VirtualColumn

java.lang.Object
  org.apache.hadoop.hive.ql.metadata.VirtualColumn

All Implemented Interfaces:

Serializable

public class VirtualColumn
extends Object
implements Serializable

See Also:

Serialized Form

Field Summary

static VirtualColumn	BLOCKOFFSET
static VirtualColumn	FILENAME
static VirtualColumn	GROUPINGID GROUPINGID is used with GROUP BY GROUPINGS SETS, ROLLUP and CUBE.
static VirtualColumn	RAWDATASIZE
static VirtualColumn	ROWOFFSET
static VirtualColumn[]	VIRTUAL_COLUMNS

Constructor Summary

VirtualColumn()

VirtualColumn(String name, PrimitiveTypeInfo typeInfo)

Method Summary

boolean	equals(Object o)
boolean	getIsHidden()
String	getName()
static List<VirtualColumn>	getRegistry(org.apache.hadoop.conf.Configuration conf)
static List<VirtualColumn>	getStatsRegistry(org.apache.hadoop.conf.Configuration conf)
PrimitiveTypeInfo	getTypeInfo()
static StructObjectInspector	getVCSObjectInspector(List<VirtualColumn> vcs)
boolean	isHidden()
static Collection<String>	removeVirtualColumns(Collection<String> columns)
void	setIsHidden(boolean isHidden)
void	setName(String name)
void	setTypeInfo(PrimitiveTypeInfo typeInfo)

Methods inherited from class java.lang.Object

getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

FILENAME

public static VirtualColumn FILENAME

BLOCKOFFSET

public static VirtualColumn BLOCKOFFSET

ROWOFFSET

public static VirtualColumn ROWOFFSET

RAWDATASIZE

public static VirtualColumn RAWDATASIZE

GROUPINGID

public static VirtualColumn GROUPINGID

GROUPINGID is used with GROUP BY GROUPINGS SETS, ROLLUP and CUBE. It composes a bit vector with the "0" and "1" values for every column which is GROUP BY section. "1" is for a row in the result set if that column has been aggregated in that row. Otherwise the value is "0". Returns the decimal representation of the bit vector.

VIRTUAL_COLUMNS

public static VirtualColumn[] VIRTUAL_COLUMNS

Constructor Detail

VirtualColumn

public VirtualColumn()

VirtualColumn

public VirtualColumn(String name,
                     PrimitiveTypeInfo typeInfo)

Method Detail

getStatsRegistry

public static List<VirtualColumn> getStatsRegistry(org.apache.hadoop.conf.Configuration conf)

getRegistry

public static List<VirtualColumn> getRegistry(org.apache.hadoop.conf.Configuration conf)

getTypeInfo

public PrimitiveTypeInfo getTypeInfo()

setTypeInfo

public void setTypeInfo(PrimitiveTypeInfo typeInfo)

getName

public String getName()

setName

public void setName(String name)

isHidden

public boolean isHidden()

getIsHidden

public boolean getIsHidden()

setIsHidden

public void setIsHidden(boolean isHidden)

equals

public boolean equals(Object o)

Overrides:

equals in class Object

removeVirtualColumns

public static Collection<String> removeVirtualColumns(Collection<String> columns)

getVCSObjectInspector

public static StructObjectInspector getVCSObjectInspector(List<VirtualColumn> vcs)