QuerySqlField.Group (Ignite 2.17.0)

```
@Retention(RUNTIME)
@Target({METHOD,FIELD})
public static @interface QuerySqlField.Group
```
Describes group of index and position of field in this group.
Opposite to QuerySqlField.groups() this annotation gives control over order of fields in a group index. This can be needed in scenarios when we have a query like select * from X where a = ? and b = ? order by b desc. If we have index (a asc, b asc) sorting on b will be performed. Here it is preferable to have index (b desc, a asc) which will still allow query to search on index using both fields and avoid sorting because index is already sorted in needed way.

See Also:

QuerySqlField.groups(), QuerySqlField.orderedGroups()

Required Element Summary

Required Elements
Modifier and Type	Required Element	Description
`String`	`name`	Group index name where this field participate.
`int`	`order`	Fields in this group index will be sorted on this attribute.

Optional Element Summary

Optional Elements
Modifier and Type Optional Element Description

boolean descending
Defines sorting order for this field in group.

- Element Detail
  - name
```
String name
```
    Group index name where this field participate.
    
    Returns:
    
    Group index name
- - order
```
int order
```
    Fields in this group index will be sorted on this attribute.
    
    Returns:
    
    Order number.
- - descending
```
boolean descending
```
    Defines sorting order for this field in group.
    
    Returns:
    
    True if field will be in descending order.
    
    Default:
    
    false