org.apache.shardingsphere.sql.parser.relation.segment.select.projection

Class ProjectionsContext

java.lang.Object

org.apache.shardingsphere.sql.parser.relation.segment.select.projection.ProjectionsContext

public final class ProjectionsContext
extends Object

Projections context.

Author:

zhangliang, sunbufu

Constructor Summary

Constructors

Constructor and Description
ProjectionsContext()

Method Summary

Modifier and Type	Method and Description
com.google.common.base.Optional<String>	findAlias(String projectionName) Find alias.
com.google.common.base.Optional<Integer>	findProjectionIndex(String projectionName) Find projection index.
List<AggregationDistinctProjection>	getAggregationDistinctProjections() Get aggregation distinct projections.
List<AggregationProjection>	getAggregationProjections() Get aggregation projections.
boolean	isUnqualifiedShorthandProjection() Judge is unqualified shorthand projection or not.

Methods inherited from class java.lang.Object

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

Constructor Detail

ProjectionsContext

public ProjectionsContext()

Method Detail

isUnqualifiedShorthandProjection

public boolean isUnqualifiedShorthandProjection()

Judge is unqualified shorthand projection or not.

Returns:

is unqualified shorthand projection or not

findAlias

public com.google.common.base.Optional<String> findAlias(String projectionName)

Find alias.

Parameters:

projectionName - projection name

Returns:

projection alias

findProjectionIndex

public com.google.common.base.Optional<Integer> findProjectionIndex(String projectionName)

Find projection index.

Parameters:

projectionName - projection name

Returns:

projection index

getAggregationProjections

public List<AggregationProjection> getAggregationProjections()

Get aggregation projections.

Returns:

aggregation projections

getAggregationDistinctProjections

public List<AggregationDistinctProjection> getAggregationDistinctProjections()

Get aggregation distinct projections.

Returns:

aggregation distinct projections