org.apache.pig.newplan.logical.relational

Class LOGenerate

java.lang.Object

org.apache.pig.newplan.Operator

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

org.apache.pig.newplan.logical.relational.LOGenerate

public class LOGenerate
extends LogicalRelationalOperator

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
LOGenerate(OperatorPlan plan)
LOGenerate(OperatorPlan plan, List<LogicalExpressionPlan> ps, boolean[] flatten)

Method Summary

Methods

Modifier and Type	Method and Description
void	accept(PlanVisitor v) Accept a visitor at this node in the graph.
boolean[]	getFlattenFlags()
List<LogicalExpressionPlan>	getOutputPlans()
List<LogicalSchema>	getOutputPlanSchemas() Get the output schema corresponding to each input expression plan
LogicalSchema	getSchema() Get the schema for the output of this relational operator.
List<LogicalSchema>	getUidOnlySchemas()
List<LogicalSchema>	getUserDefinedSchema()
boolean	isEqual(Operator other) This is like a shallow equals comparison.
void	resetSchema() Reset the schema to null so that the next time getSchema is called the schema will be regenerated from scratch.
void	resetUid() Erase all cached uid, regenerate uid when we regenerating schema.
void	setFlattenFlags(boolean[] flatten)
void	setOutputPlans(List<LogicalExpressionPlan> plans)
void	setOutputPlanSchemas(List<LogicalSchema> outputPlanSchemas)
void	setUidOnlySchemas(List<LogicalSchema> uidOnlySchemas)
void	setUserDefinedSchema(List<LogicalSchema> userDefinedSchema)
String	toString()

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

checkEquality, fixDuplicateUids, getAlias, getCustomPartitioner, getLineNumber, getRequestedParallelism, isPinnedOption, neverUseForRealSetSchema, pinOption, 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

LOGenerate

public LOGenerate(OperatorPlan plan,
          List<LogicalExpressionPlan> ps,
          boolean[] flatten)

LOGenerate

public LOGenerate(OperatorPlan plan)

Method Detail

setOutputPlans

public void setOutputPlans(List<LogicalExpressionPlan> plans)

getSchema

public LogicalSchema getSchema()
                        throws FrontendException

Description copied from class: LogicalRelationalOperator

Get the schema for the output of this relational operator. This does not merely return the schema variable. If schema is not yet set, this will attempt to construct it. Therefore it is abstract since each operator will need to construct its schema differently.

Specified by:

getSchema in class LogicalRelationalOperator

Returns:

the schema

Throws:

FrontendException

getOutputPlans

public List<LogicalExpressionPlan> getOutputPlans()

getFlattenFlags

public boolean[] getFlattenFlags()

setFlattenFlags

public void setFlattenFlags(boolean[] flatten)

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

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

toString

public String toString()

Overrides:

toString in class LogicalRelationalOperator

getUserDefinedSchema

public List<LogicalSchema> getUserDefinedSchema()

setUserDefinedSchema

public void setUserDefinedSchema(List<LogicalSchema> userDefinedSchema)

getOutputPlanSchemas

public List<LogicalSchema> getOutputPlanSchemas()

Get the output schema corresponding to each input expression plan

Returns:

list of output schemas

setOutputPlanSchemas

public void setOutputPlanSchemas(List<LogicalSchema> outputPlanSchemas)

getUidOnlySchemas

public List<LogicalSchema> getUidOnlySchemas()

setUidOnlySchemas

public void setUidOnlySchemas(List<LogicalSchema> uidOnlySchemas)

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

resetSchema

public void resetSchema()

Description copied from class: LogicalRelationalOperator

Reset the schema to null so that the next time getSchema is called the schema will be regenerated from scratch.

Overrides:

resetSchema in class LogicalRelationalOperator