org.mybatis.dynamic.sql.select.aggregate

Class AbstractCount

java.lang.Object

org.mybatis.dynamic.sql.select.aggregate.AbstractCount

All Implemented Interfaces:

BasicColumn, BindableColumn<Long>

Direct Known Subclasses:

Count, CountAll, CountDistinct

public abstract class AbstractCount
extends Object
implements BindableColumn<Long>

Count functions are implemented differently than the other aggregates. This is primarily to preserve backwards compatibility. Count functions are configured as BindableColumns of type Long as it is assumed that the count functions always return a number.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	AbstractCount()
protected	AbstractCount(String alias)

Method Summary

Modifier and Type	Method and Description
Optional<String>	alias() Returns the columns alias if one has been specified.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.mybatis.dynamic.sql.BindableColumn

as, convertParameterType, jdbcType, renderingStrategy, typeHandler

Methods inherited from interface org.mybatis.dynamic.sql.BasicColumn

columnList, renderWithTableAlias, renderWithTableAndColumnAlias

Constructor Detail

AbstractCount

protected AbstractCount()

AbstractCount

protected AbstractCount(String alias)

Method Detail

alias

public Optional<String> alias()

Description copied from interface: BasicColumn

Returns the columns alias if one has been specified.

Specified by:

alias in interface BasicColumn

Returns:

the column alias