org.apache.hadoop.hive.ql.metadata

Class VirtualColumn

java.lang.Object

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

All Implemented Interfaces:

Serializable

@InterfaceAudience.Private
public class VirtualColumn
extends Object
implements Serializable

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
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	ROWID RecordIdentifier
static VirtualColumn	ROWOFFSET
static com.google.common.collect.ImmutableSet<String>	VIRTUAL_COLUMN_NAMES

Method Summary

Methods

Modifier and Type	Method and Description
boolean	equals(Object o)
boolean	getIsHidden()
String	getName()
ObjectInspector	getObjectInspector()
static List<VirtualColumn>	getRegistry(org.apache.hadoop.conf.Configuration conf)
static List<VirtualColumn>	getStatsRegistry(org.apache.hadoop.conf.Configuration conf)
TypeInfo	getTypeInfo()
static StructObjectInspector	getVCSObjectInspector(List<VirtualColumn> vcs)
int	hashCode()
boolean	isHidden()
static Collection<String>	removeVirtualColumns(Collection<String> columns)
static List<TypeInfo>	removeVirtualColumnTypes(List<String> columnNames, List<TypeInfo> columnTypes)

Methods inherited from class java.lang.Object

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

Field Detail

FILENAME

public static final VirtualColumn FILENAME

BLOCKOFFSET

public static final VirtualColumn BLOCKOFFSET

ROWOFFSET

public static final VirtualColumn ROWOFFSET

RAWDATASIZE

public static final VirtualColumn RAWDATASIZE

ROWID

public static final VirtualColumn ROWID

RecordIdentifier

GROUPINGID

public static final 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_COLUMN_NAMES

public static com.google.common.collect.ImmutableSet<String> VIRTUAL_COLUMN_NAMES

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 TypeInfo getTypeInfo()

getName

public String getName()

isHidden

public boolean isHidden()

getIsHidden

public boolean getIsHidden()

getObjectInspector

public ObjectInspector getObjectInspector()

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

removeVirtualColumns

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

removeVirtualColumnTypes

public static List<TypeInfo> removeVirtualColumnTypes(List<String> columnNames,
                                      List<TypeInfo> columnTypes)

getVCSObjectInspector

public static StructObjectInspector getVCSObjectInspector(List<VirtualColumn> vcs)