org.apache.pig.backend.hadoop.executionengine.physicalLayer
Class LogToPhyTranslationVisitor
java.lang.Object
org.apache.pig.impl.plan.PlanVisitor<LogicalOperator,LogicalPlan>
org.apache.pig.impl.logicalLayer.LOVisitor
org.apache.pig.backend.hadoop.executionengine.physicalLayer.LogToPhyTranslationVisitor
- Direct Known Subclasses:
- LocalLogToPhyTranslationVisitor
public class LogToPhyTranslationVisitor
- extends LOVisitor
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
logToPhyMap
protected Map<LogicalOperator,PhysicalOperator> logToPhyMap
currentPlans
protected Stack<PhysicalPlan> currentPlans
currentPlan
protected PhysicalPlan currentPlan
nodeGen
protected NodeIdGenerator nodeGen
pc
protected PigContext pc
LogToPhyTranslationVisitor
public LogToPhyTranslationVisitor(LogicalPlan plan)
setPigContext
public void setPigContext(PigContext pc)
getPhysicalPlan
public PhysicalPlan getPhysicalPlan()
visit
public void visit(LOGreaterThan op)
throws VisitorException
- Overrides:
visit
in class LOVisitor
- Throws:
VisitorException
visit
public void visit(LOLesserThan op)
throws VisitorException
- Overrides:
visit
in class LOVisitor
- Throws:
VisitorException
visit
public void visit(LOGreaterThanEqual op)
throws VisitorException
- Overrides:
visit
in class LOVisitor
- Throws:
VisitorException
visit
public void visit(LOLesserThanEqual op)
throws VisitorException
- Overrides:
visit
in class LOVisitor
- Throws:
VisitorException
visit
public void visit(LOEqual op)
throws VisitorException
- Overrides:
visit
in class LOVisitor
- Throws:
VisitorException
visit
public void visit(LONotEqual op)
throws VisitorException
- Overrides:
visit
in class LOVisitor
- Throws:
VisitorException
visit
public void visit(LORegexp op)
throws VisitorException
- Overrides:
visit
in class LOVisitor
- Parameters:
op
- the logical regexp operator that has to be visited
- Throws:
VisitorException
visit
public void visit(LOAdd op)
throws VisitorException
- Overrides:
visit
in class LOVisitor
- Throws:
VisitorException
visit
public void visit(LOSubtract op)
throws VisitorException
- Overrides:
visit
in class LOVisitor
- Throws:
VisitorException
visit
public void visit(LOMultiply op)
throws VisitorException
- Overrides:
visit
in class LOVisitor
- Throws:
VisitorException
visit
public void visit(LODivide op)
throws VisitorException
- Overrides:
visit
in class LOVisitor
- Throws:
VisitorException
visit
public void visit(LOMod op)
throws VisitorException
- Overrides:
visit
in class LOVisitor
- Throws:
VisitorException
visit
public void visit(LOAnd op)
throws VisitorException
- Overrides:
visit
in class LOVisitor
- Throws:
VisitorException
visit
public void visit(LOOr op)
throws VisitorException
- Overrides:
visit
in class LOVisitor
- Throws:
VisitorException
visit
public void visit(LONot op)
throws VisitorException
- Overrides:
visit
in class LOVisitor
- Throws:
VisitorException
visit
protected void visit(LOCross cs)
throws VisitorException
- Overrides:
visit
in class LOVisitor
- Throws:
VisitorException
visit
public void visit(LOCogroup cg)
throws VisitorException
- Overrides:
visit
in class LOVisitor
- Parameters:
cg
- the logical cogroup operator that has to be visited
- Throws:
VisitorException
visit
protected void visit(LOJoin loj)
throws VisitorException
- Overrides:
visit
in class LOVisitor
- Parameters:
loj
- the logical join operator that has to be visited
- Throws:
VisitorException
updateWithEmptyBagCheck
public static void updateWithEmptyBagCheck(PhysicalPlan fePlan,
LogicalOperator joinInput)
throws PlanException,
LogicalToPhysicalTranslatorException
- updates plan with check for empty bag and if bag is empty to flatten a bag
with as many null's as dictated by the schema
- Parameters:
fePlan
- the plan to updatejoinInput
- the relation for which the corresponding bag is being checked
- Throws:
PlanException
LogicalToPhysicalTranslatorException
visit
public void visit(LOFilter filter)
throws VisitorException
- Overrides:
visit
in class LOVisitor
- Parameters:
filter
- the logical filter operator that has to be visited
- Throws:
VisitorException
visit
public void visit(LOStream stream)
throws VisitorException
- Overrides:
visit
in class LOVisitor
- Throws:
VisitorException
visit
public void visit(LOProject op)
throws VisitorException
- Overrides:
visit
in class LOVisitor
- Throws:
VisitorException
visit
public void visit(LOForEach g)
throws VisitorException
- Overrides:
visit
in class LOVisitor
- Parameters:
g
- the logical foreach operator that has to be visited
- Throws:
VisitorException
visit
public void visit(LOSort s)
throws VisitorException
- Overrides:
visit
in class LOVisitor
- Parameters:
s
- the logical sort operator that has to be visited
- Throws:
VisitorException
visit
public void visit(LODistinct op)
throws VisitorException
- Overrides:
visit
in class LOVisitor
- Throws:
VisitorException
visit
public void visit(LOSplit split)
throws VisitorException
- Overrides:
visit
in class LOVisitor
- Parameters:
split
- the logical split operator that has to be visited
- Throws:
VisitorException
visit
public void visit(LOSplitOutput split)
throws VisitorException
- Overrides:
visit
in class LOVisitor
- Throws:
VisitorException
visit
public void visit(LOUserFunc func)
throws VisitorException
- Description copied from class:
LOVisitor
- Iterate over each expression that is part of the function argument list
- Overrides:
visit
in class LOVisitor
- Parameters:
func
- the user defined function
- Throws:
VisitorException
visit
public void visit(LOLoad loLoad)
throws VisitorException
- Overrides:
visit
in class LOVisitor
- Throws:
VisitorException
visit
public void visit(LOStore loStore)
throws VisitorException
- Overrides:
visit
in class LOVisitor
- Throws:
VisitorException
visit
public void visit(LOConst op)
throws VisitorException
- Overrides:
visit
in class LOVisitor
- Throws:
VisitorException
visit
public void visit(LOBinCond op)
throws VisitorException
- Overrides:
visit
in class LOVisitor
- Parameters:
op
- the logical binCond operator that has to be visited
- Throws:
VisitorException
visit
public void visit(LONegative op)
throws VisitorException
- Overrides:
visit
in class LOVisitor
- Throws:
VisitorException
visit
public void visit(LOIsNull op)
throws VisitorException
- Overrides:
visit
in class LOVisitor
- Throws:
VisitorException
visit
public void visit(LOMapLookup op)
throws VisitorException
- Overrides:
visit
in class LOVisitor
- Throws:
VisitorException
visit
public void visit(LOCast op)
throws VisitorException
- Overrides:
visit
in class LOVisitor
- Parameters:
op
- the logical cast operator that has to be visited
- Throws:
VisitorException
visit
public void visit(LOLimit limit)
throws VisitorException
- Overrides:
visit
in class LOVisitor
- Throws:
VisitorException
visit
public void visit(LOUnion op)
throws VisitorException
- Overrides:
visit
in class LOVisitor
- Throws:
VisitorException
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