org.apache.lens.server.api.driver

Class DriverQueryPlan

java.lang.Object

org.apache.lens.server.api.driver.DriverQueryPlan

Direct Known Subclasses:

HiveQueryPlan, RewriterPlan

public abstract class DriverQueryPlan
extends Object

The Class DriverQueryPlan.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	DriverQueryPlan.ExecMode The Enum ExecMode.
static class	DriverQueryPlan.ScanMode The Enum ScanMode.

Constructor Summary

Constructors

Constructor and Description
DriverQueryPlan()

Method Summary

Methods

Modifier and Type	Method and Description
abstract QueryCost	getCost() Get the cost associated with the plan
DriverQueryPlan.ExecMode	getExecMode() Get the exec mode
QueryHandle	getHandle() Deprecated.
Map<String,Set<?>>	getPartitions() Get list of partitions queried for each table
abstract String	getPlan() Get the query plan
QueryPrepareHandle	getPrepareHandle()
String	getResultDestination() Get the result destination
DriverQueryPlan.ScanMode	getScanMode() Get the scan mode.
Set<String>	getTablesQueried() Get the list of tables to be queried
Double	getTableWeight(String tableName) Get the weight of the table.
Map<String,Double>	getTableWeights() Get the table weights
boolean	hasSubQuery() Get if the query has a subquery or not.
void	setPrepareHandle(QueryPrepareHandle handle)
QueryPlan	toQueryPlan() To query plan.

Methods inherited from class java.lang.Object

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

Constructor Detail

DriverQueryPlan

public DriverQueryPlan()

Method Detail

getPlan

public abstract String getPlan()

Get the query plan

Returns:

The string representation of the plan

getCost

public abstract QueryCost getCost()

Get the cost associated with the plan

Returns:

QueryCostTO object

getTablesQueried

public Set<String> getTablesQueried()

Get the list of tables to be queried

Returns:

the tablesQueried

hasSubQuery

public boolean hasSubQuery()

Get if the query has a subquery or not.

Returns:

the hasSubQuery true if query has subquery, false otherwise

getResultDestination

public String getResultDestination()

Get the result destination

Returns:

the resultDestination The destination can be another table or filesystem path or inmemory result

getTableWeights

public Map<String,Double> getTableWeights()

Get the table weights

Returns:

the tableWeights

getTableWeight

public Double getTableWeight(String tableName)

Get the weight of the table.

Parameters:

tableName - the table name

Returns:

the weight

getExecMode

public DriverQueryPlan.ExecMode getExecMode()

Get the exec mode

Returns:

the DriverQueryPlan.ExecMode

getScanMode

public DriverQueryPlan.ScanMode getScanMode()

Get the scan mode.

Returns:

the DriverQueryPlan.ScanMode

getHandle

public QueryHandle getHandle()

Deprecated.

Returns:

the handle

getPrepareHandle

public QueryPrepareHandle getPrepareHandle()

Returns:

the prepare handle

setPrepareHandle

public void setPrepareHandle(QueryPrepareHandle handle)

Parameters:

handle - the handle to set

getPartitions

public Map<String,Set<?>> getPartitions()

Get list of partitions queried for each table

Returns:

toQueryPlan

public QueryPlan toQueryPlan()
                      throws UnsupportedEncodingException

To query plan.

Returns:

the query plan

Throws:

UnsupportedEncodingException - the unsupported encoding exception