org.apache.drill.exec.planner.logical

Class ScanFieldDeterminer

java.lang.Object

org.apache.drill.common.logical.data.visitors.AbstractLogicalVisitor<Void,ScanFieldDeterminer.FieldList,RuntimeException>

org.apache.drill.exec.planner.logical.ScanFieldDeterminer

All Implemented Interfaces:

LogicalVisitor<Void,ScanFieldDeterminer.FieldList,RuntimeException>

public class ScanFieldDeterminer
extends AbstractLogicalVisitor<Void,ScanFieldDeterminer.FieldList,RuntimeException>

This visitor will walk a logical plan and record in a map the list of field references associated to each scan. These can then be used to update scan object to appear to be explicitly fielded for optimization purposes.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ScanFieldDeterminer.FieldList

Method Summary

Methods

Modifier and Type	Method and Description
static Map<Scan,ScanFieldDeterminer.FieldList>	getFieldLists(LogicalPlan plan)
Void	visitFilter(Filter filter, ScanFieldDeterminer.FieldList value)
Void	visitGroupingAggregate(GroupingAggregate groupBy, ScanFieldDeterminer.FieldList value)
Void	visitJoin(Join join, ScanFieldDeterminer.FieldList fl)
Void	visitLimit(Limit limit, ScanFieldDeterminer.FieldList value)
Void	visitOrder(Order order, ScanFieldDeterminer.FieldList fl)
Void	visitProject(Project project, ScanFieldDeterminer.FieldList value)
Void	visitScan(Scan scan, ScanFieldDeterminer.FieldList value)
Void	visitStore(Store store, ScanFieldDeterminer.FieldList value)
Void	visitUnion(Union union, ScanFieldDeterminer.FieldList value)
Void	visitValues(Values constant, ScanFieldDeterminer.FieldList value)

Methods inherited from class org.apache.drill.common.logical.data.visitors.AbstractLogicalVisitor

visitFlatten, visitOp, visitRunningAggregate, visitSequence, visitTransform, visitWindow, visitWriter

Methods inherited from class java.lang.Object

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

Method Detail

getFieldLists

public static Map<Scan,ScanFieldDeterminer.FieldList> getFieldLists(LogicalPlan plan)

visitScan

public Void visitScan(Scan scan,
             ScanFieldDeterminer.FieldList value)

Specified by:

visitScan in interface LogicalVisitor<Void,ScanFieldDeterminer.FieldList,RuntimeException>

Overrides:

visitScan in class AbstractLogicalVisitor<Void,ScanFieldDeterminer.FieldList,RuntimeException>

visitStore

public Void visitStore(Store store,
              ScanFieldDeterminer.FieldList value)

Specified by:

visitStore in interface LogicalVisitor<Void,ScanFieldDeterminer.FieldList,RuntimeException>

Overrides:

visitStore in class AbstractLogicalVisitor<Void,ScanFieldDeterminer.FieldList,RuntimeException>

visitGroupingAggregate

public Void visitGroupingAggregate(GroupingAggregate groupBy,
                          ScanFieldDeterminer.FieldList value)

Specified by:

visitGroupingAggregate in interface LogicalVisitor<Void,ScanFieldDeterminer.FieldList,RuntimeException>

Overrides:

visitGroupingAggregate in class AbstractLogicalVisitor<Void,ScanFieldDeterminer.FieldList,RuntimeException>

visitFilter

public Void visitFilter(Filter filter,
               ScanFieldDeterminer.FieldList value)

Specified by:

visitFilter in interface LogicalVisitor<Void,ScanFieldDeterminer.FieldList,RuntimeException>

Overrides:

visitFilter in class AbstractLogicalVisitor<Void,ScanFieldDeterminer.FieldList,RuntimeException>

visitProject

public Void visitProject(Project project,
                ScanFieldDeterminer.FieldList value)

Specified by:

visitProject in interface LogicalVisitor<Void,ScanFieldDeterminer.FieldList,RuntimeException>

Overrides:

visitProject in class AbstractLogicalVisitor<Void,ScanFieldDeterminer.FieldList,RuntimeException>

visitValues

public Void visitValues(Values constant,
               ScanFieldDeterminer.FieldList value)

Specified by:

visitValues in interface LogicalVisitor<Void,ScanFieldDeterminer.FieldList,RuntimeException>

Overrides:

visitValues in class AbstractLogicalVisitor<Void,ScanFieldDeterminer.FieldList,RuntimeException>

visitOrder

public Void visitOrder(Order order,
              ScanFieldDeterminer.FieldList fl)

Specified by:

visitOrder in interface LogicalVisitor<Void,ScanFieldDeterminer.FieldList,RuntimeException>

Overrides:

visitOrder in class AbstractLogicalVisitor<Void,ScanFieldDeterminer.FieldList,RuntimeException>

visitJoin

public Void visitJoin(Join join,
             ScanFieldDeterminer.FieldList fl)

Specified by:

visitJoin in interface LogicalVisitor<Void,ScanFieldDeterminer.FieldList,RuntimeException>

Overrides:

visitJoin in class AbstractLogicalVisitor<Void,ScanFieldDeterminer.FieldList,RuntimeException>

visitLimit

public Void visitLimit(Limit limit,
              ScanFieldDeterminer.FieldList value)

Specified by:

visitLimit in interface LogicalVisitor<Void,ScanFieldDeterminer.FieldList,RuntimeException>

Overrides:

visitLimit in class AbstractLogicalVisitor<Void,ScanFieldDeterminer.FieldList,RuntimeException>

visitUnion

public Void visitUnion(Union union,
              ScanFieldDeterminer.FieldList value)

Specified by:

visitUnion in interface LogicalVisitor<Void,ScanFieldDeterminer.FieldList,RuntimeException>

Overrides:

visitUnion in class AbstractLogicalVisitor<Void,ScanFieldDeterminer.FieldList,RuntimeException>