Aggregate (OpenJPA Parent POM 4.0.0 API)

All Superinterfaces:

Expression, OrderByItem, PredicateOperand, SelectItem

All Known Implementing Classes:

AbsExpression, AverageExpression, ConcatExpression, CountExpression, DistinctExpression, IndexExpression, LengthExpression, LowerExpression, MaxExpression, MinExpression, SizeExpression, SquareRootExpression, SubStringExpression, SumExpression, TrimExpression, TypeExpression, UnaryMinusExpression, UpperExpression
```
public interface Aggregate
extends Expression
```
Type of the result of an aggregate operation

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`Expression`	`distinct()`	Specify that duplicates are to be removed before the aggregate operation is invoked.

Methods inherited from interface org.apache.openjpa.persistence.query.Expression
abs, concat, concat, dividedBy, dividedBy, in, in, in, in, in, in, isNull, length, locate, locate, locate, locate, locate, locate, lower, member, minus, minus, minus, mod, mod, plus, plus, sqrt, substring, substring, substring, substring, substring, substring, times, times, trim, trim, trim, trim, trim, trim, upper

Methods inherited from interface org.apache.openjpa.persistence.query.PredicateOperand
between, between, between, between, between, between, between, between, between, between, between, between, between, equal, equal, equal, equal, equal, equal, equal, equal, greaterEqual, greaterEqual, greaterEqual, greaterEqual, greaterEqual, greaterThan, greaterThan, greaterThan, greaterThan, greaterThan, lessEqual, lessEqual, lessEqual, lessEqual, lessEqual, lessThan, lessThan, lessThan, lessThan, lessThan, like, like, like, like, like, like, notEqual, notEqual, notEqual, notEqual, notEqual, notEqual, notEqual, notEqual

Methods inherited from interface org.apache.openjpa.persistence.query.SelectItem
asc, desc

- Method Detail
  - distinct
```
Expression distinct()
```
    Specify that duplicates are to be removed before the aggregate operation is invoked.