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

接口 Projection

所有已知实现类:

AggregationDistinctProjection, AggregationProjection, ColumnProjection, DerivedProjection, ExpressionProjection, ShorthandProjection

public interface Projection

Projection interface.

方法概要

限定符和类型	方法和说明
Optional<String>	getAlias() Get alias.
String	getColumnLabel() Get columnLabel.
String	getExpression() Get expression.

方法详细资料

getExpression

String getExpression()

Get expression.

返回:

expression

getAlias

Optional<String> getAlias()

Get alias.

返回:

alias

getColumnLabel

String getColumnLabel()

Get columnLabel.

返回:

columnLabel