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

Class ColumnProjection

java.lang.Object

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

All Implemented Interfaces:

Projection

public final class ColumnProjection
extends Object
implements Projection

Common projection.

Author:

zhangliang, sunbufu

Constructor Summary

Constructors

Constructor and Description
ColumnProjection()

Method Summary

Modifier and Type	Method and Description
com.google.common.base.Optional<String>	getAlias() Get alias.
String	getColumnLabel() Get columnLabel.
String	getExpression() Get expression.

Methods inherited from class java.lang.Object

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

Constructor Detail

ColumnProjection

public ColumnProjection()

Method Detail

getExpression

public String getExpression()

Description copied from interface: Projection

Get expression.

Specified by:

getExpression in interface Projection

Returns:

expression

getColumnLabel

public String getColumnLabel()

Description copied from interface: Projection

Get columnLabel.

Specified by:

getColumnLabel in interface Projection

Returns:

columnLabel

getAlias

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

Description copied from interface: Projection

Get alias.

Specified by:

getAlias in interface Projection

Returns:

alias