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

类 ProjectionsContext

java.lang.Object

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

public final class ProjectionsContext
extends Object

Projections context.

构造器概要

构造器

构造器和说明
ProjectionsContext()

方法概要

限定符和类型	方法和说明
Optional<String>	findAlias(String projectionName) Find alias.
Optional<Integer>	findProjectionIndex(String projectionName) Find projection index.
List<AggregationDistinctProjection>	getAggregationDistinctProjections() Get aggregation distinct projections.
List<AggregationProjection>	getAggregationProjections() Get aggregation projections.
List<Projection>	getExpandProjections() Get expand projections with shorthand projections.
boolean	isUnqualifiedShorthandProjection() Judge is unqualified shorthand projection or not.

从类继承的方法 java.lang.Object

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

构造器详细资料

ProjectionsContext

public ProjectionsContext()

方法详细资料

isUnqualifiedShorthandProjection

public boolean isUnqualifiedShorthandProjection()

Judge is unqualified shorthand projection or not.

返回:

is unqualified shorthand projection or not

findAlias

public Optional<String> findAlias(String projectionName)

Find alias.

参数:

projectionName - projection name

返回:

projection alias

findProjectionIndex

public Optional<Integer> findProjectionIndex(String projectionName)

Find projection index.

参数:

projectionName - projection name

返回:

projection index

getAggregationProjections

public List<AggregationProjection> getAggregationProjections()

Get aggregation projections.

返回:

aggregation projections

getAggregationDistinctProjections

public List<AggregationDistinctProjection> getAggregationDistinctProjections()

Get aggregation distinct projections.

返回:

aggregation distinct projections

getExpandProjections

public List<Projection> getExpandProjections()

Get expand projections with shorthand projections.

返回:

expand projections