org.apache.hadoop.hive.ql.hooks

Class ReadEntity

java.lang.Object

org.apache.hadoop.hive.ql.hooks.Entity

org.apache.hadoop.hive.ql.hooks.ReadEntity

All Implemented Interfaces:

Serializable

public class ReadEntity
extends Entity
implements Serializable

This class encapsulates the information on the partition and tables that are read by the query.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.hadoop.hive.ql.hooks.Entity

Entity.Type

Constructor Summary

Constructors

Constructor and Description
ReadEntity() For serialization only.
ReadEntity(Database database) Constructor for a database.
ReadEntity(Partition p) Constructor given a partition.
ReadEntity(Partition p, ReadEntity parent)
ReadEntity(Partition p, ReadEntity parent, boolean isDirect)
ReadEntity(org.apache.hadoop.fs.Path d, boolean islocal) Constructor for a file.
ReadEntity(Table t) Constructor.
ReadEntity(Table t, ReadEntity parent)
ReadEntity(Table t, ReadEntity parent, boolean isDirect)

Method Summary

Methods

Modifier and Type	Method and Description
boolean	equals(Object o) Equals function.
List<String>	getAccessedColumns()
Set<ReadEntity>	getParents()
boolean	isDirect()
boolean	isUpdateOrDelete()
boolean	needsLock()
void	noLockNeeded()
void	setDirect(boolean isDirect)
void	setUpdateOrDelete(boolean isUpdateOrDelete)

Methods inherited from class org.apache.hadoop.hive.ql.hooks.Entity

getD, getDatabase, getFunctionName, getLocation, getName, getP, getParameters, getPartition, getT, getTable, getTyp, getType, hashCode, isComplete, isDummy, isPathType, setComplete, setD, setDatabase, setFunctionName, setName, setP, setT, setTyp, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

ReadEntity

public ReadEntity()

For serialization only.

ReadEntity

public ReadEntity(Database database)

Constructor for a database.

ReadEntity

public ReadEntity(Table t)

Constructor.

Parameters:

t - The Table that the query reads from.

ReadEntity

public ReadEntity(Table t,
          ReadEntity parent)

ReadEntity

public ReadEntity(Table t,
          ReadEntity parent,
          boolean isDirect)

ReadEntity

public ReadEntity(Partition p)

Constructor given a partition.

Parameters:

p - The partition that the query reads from.

ReadEntity

public ReadEntity(Partition p,
          ReadEntity parent)

ReadEntity

public ReadEntity(Partition p,
          ReadEntity parent,
          boolean isDirect)

ReadEntity

public ReadEntity(org.apache.hadoop.fs.Path d,
          boolean islocal)

Constructor for a file.

Parameters:

d - The name of the directory that is being written to.

islocal - Flag to decide whether this directory is local or in dfs.

Method Detail

getParents

public Set<ReadEntity> getParents()

equals

public boolean equals(Object o)

Equals function.

Overrides:

equals in class Entity

isDirect

public boolean isDirect()

setDirect

public void setDirect(boolean isDirect)

needsLock

public boolean needsLock()

noLockNeeded

public void noLockNeeded()

getAccessedColumns

public List<String> getAccessedColumns()

setUpdateOrDelete

public void setUpdateOrDelete(boolean isUpdateOrDelete)

isUpdateOrDelete

public boolean isUpdateOrDelete()