org.apache.pig.newplan.logical.relational
Class LOLimit

java.lang.Object
  extended by org.apache.pig.newplan.Operator
      extended by org.apache.pig.newplan.logical.relational.LogicalRelationalOperator
          extended by org.apache.pig.newplan.logical.relational.LOLimit

public class LOLimit
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
LOLimit(LogicalPlan plan)
           
LOLimit(LogicalPlan plan, LogicalExpressionPlan limitPlan)
           
LOLimit(LogicalPlan plan, long limit)
           
 
Method Summary
 void accept(PlanVisitor v)
          Accept a visitor at this node in the graph.
 Operator getInput(LogicalPlan plan)
           
 long getLimit()
           
 LogicalExpressionPlan getLimitPlan()
           
 LogicalSchema getSchema()
          Get the schema for the output of this relational operator.
 boolean isEqual(Operator other)
          This is like a shallow equals comparison.
 void setLimit(long limit)
           
 void setLimitPlan(LogicalExpressionPlan mlimitPlan)
           
 
Methods inherited from class org.apache.pig.newplan.logical.relational.LogicalRelationalOperator
checkEquality, fixDuplicateUids, getAlias, getCustomPartitioner, getLineNumber, getRequestedParallelism, isPinnedOption, neverUseForRealSetSchema, pinOption, resetSchema, resetUid, setAlias, setCustomPartitioner, setRequestedParallelism, setSchema, toString
 
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

LOLimit

public LOLimit(LogicalPlan plan)

LOLimit

public LOLimit(LogicalPlan plan,
               long limit)

LOLimit

public LOLimit(LogicalPlan plan,
               LogicalExpressionPlan limitPlan)
Method Detail

getLimit

public long getLimit()

setLimit

public void setLimit(long limit)

getLimitPlan

public LogicalExpressionPlan getLimitPlan()

setLimitPlan

public void setLimitPlan(LogicalExpressionPlan mlimitPlan)

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

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

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

getInput

public Operator getInput(LogicalPlan plan)


Copyright © 2007-2012 The Apache Software Foundation