org.apache.pig.newplan.logical.relational

Class LOLoad

java.lang.Object

org.apache.pig.newplan.Operator

org.apache.pig.newplan.logical.relational.LogicalRelationalOperator

org.apache.pig.newplan.logical.relational.LOLoad

public class LOLoad
extends LogicalRelationalOperator

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	LOLoad.CastState

Field Summary

Fields inherited from class org.apache.pig.newplan.logical.relational.LogicalRelationalOperator

alias, lineNum, mCustomPartitioner, mPinnedOptions, requestedParallelism, schema

Fields inherited from class org.apache.pig.newplan.Operator

annotations, hashPrime, location, name, plan

Constructor Summary

Constructors

Constructor and Description
LOLoad(FileSpec loader, LogicalSchema schema, LogicalPlan plan, org.apache.hadoop.conf.Configuration conf, LoadFunc loadFunc, String signature) Used from the LogicalPlanBuilder
LOLoad(LogicalSchema schema, LogicalPlan plan) used for pattern matching

Method Summary

Modifier and Type	Method and Description
void	accept(PlanVisitor v) Accept a visitor at this node in the graph.
LOLoad.CastState	getCastState()
org.apache.hadoop.conf.Configuration	getConfiguration()
LogicalSchema	getDeterminedSchema()
FileSpec	getFileSpec()
long	getLimit()
LoadFunc	getLoadFunc()
LogicalSchema	getSchema() Get the schema for this load.
String	getSchemaFile()
LogicalSchema	getScriptSchema()
String	getSignature()
boolean	isCastAdjusted()
boolean	isEqual(Operator other) This is like a shallow equals comparison.
boolean	isTmpLoad()
void	resetUid() Erase all cached uid, regenerate uid when we regenerating schema.
void	setCastState(LOLoad.CastState state)
void	setLimit(long limit)
void	setRequiredFields(List<Integer> requiredFields)
void	setScriptSchema(LogicalSchema schema)
void	setTmpLoad(boolean isTmpLoad)
String	toString()

Methods inherited from class org.apache.pig.newplan.logical.relational.LogicalRelationalOperator

checkEquality, fixDuplicateUids, getAlias, getCustomPartitioner, getLineNumber, getRequestedParallelism, isPinnedOption, neverUseForRealSetSchema, pinOption, resetSchema, setAlias, setCustomPartitioner, setRequestedParallelism, setSchema

Methods inherited from class org.apache.pig.newplan.Operator

annotate, getAnnotation, getLocation, getName, getPlan, removeAnnotation, setLocation, setPlan

Methods inherited from class java.lang.Object

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

Constructor Detail

LOLoad

public LOLoad(LogicalSchema schema,
              LogicalPlan plan)

used for pattern matching

Parameters:

schema - schema user specified in script, or null if not specified.

plan - logical plan this load is part of.

LOLoad

public LOLoad(FileSpec loader,
              LogicalSchema schema,
              LogicalPlan plan,
              org.apache.hadoop.conf.Configuration conf,
              LoadFunc loadFunc,
              String signature)

Used from the LogicalPlanBuilder

Parameters:

loader - FuncSpec for load function to use for this load.

schema - schema user specified in script, or null if not specified.

plan - logical plan this load is part of.

conf -

loadFunc - the LoadFunc that was instantiated from loader

signature - the signature that will be passed to the LoadFunc

Method Detail

getSchemaFile

public String getSchemaFile()

getLoadFunc

public LoadFunc getLoadFunc()
                     throws FrontendException

Throws:

FrontendException

setScriptSchema

public void setScriptSchema(LogicalSchema schema)

setRequiredFields

public void setRequiredFields(List<Integer> requiredFields)

getSchema

public LogicalSchema getSchema()
                        throws FrontendException

Get the schema for this load. The schema will be either be what was given by the user in the script or what the load functions getSchema call returned. Otherwise null will be returned, indicating that the schema is unknown.

Specified by:

getSchema in class LogicalRelationalOperator

Returns:

schema, or null if unknown

Throws:

FrontendException

getFileSpec

public FileSpec getFileSpec()

accept

public void accept(PlanVisitor v)
            throws FrontendException

Description copied from class: Operator

Accept a visitor at this node in the graph.

Specified by:

accept in class Operator

Parameters:

v - Visitor to accept.

Throws:

FrontendException

getDeterminedSchema

public LogicalSchema getDeterminedSchema()

isEqual

public boolean isEqual(Operator other)
                throws FrontendException

Description copied from class: Operator

This is like a shallow equals comparison. It returns true if two operators have equivalent properties even if they are different objects. Here properties mean equivalent plan and equivalent name.

Specified by:

isEqual in class Operator

Returns:

true if two object have equivalent properties, else false

Throws:

FrontendException

setCastState

public void setCastState(LOLoad.CastState state)

getCastState

public LOLoad.CastState getCastState()

isCastAdjusted

public boolean isCastAdjusted()

getConfiguration

public org.apache.hadoop.conf.Configuration getConfiguration()

resetUid

public void resetUid()

Description copied from class: LogicalRelationalOperator

Erase all cached uid, regenerate uid when we regenerating schema. This process currently only used in ImplicitSplitInsert, which will insert split and invalidate some uids in plan

Overrides:

resetUid in class LogicalRelationalOperator

toString

public String toString()

Overrides:

toString in class LogicalRelationalOperator

getSignature

public String getSignature()

isTmpLoad

public boolean isTmpLoad()

setTmpLoad

public void setTmpLoad(boolean isTmpLoad)

getScriptSchema

public LogicalSchema getScriptSchema()

getLimit

public long getLimit()

setLimit

public void setLimit(long limit)