AbstractCount (MyBatis Dynamic SQL 1.4.0 API)

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 Description
  
  protected AbstractCount()
  
  protected AbstractCount(String alias)
- Method Summary
  
  All Methods Instance Methods Concrete Methods
  Modifier and Type Method 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.BasicColumn
    renderWithTableAlias, renderWithTableAndColumnAlias
  - Methods inherited from interface org.mybatis.dynamic.sql.BindableColumn
    as, convertParameterType, javaType, jdbcType, renderingStrategy, typeHandler

- 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