ScalarExpression (iKnowBase API Documentation)

All Superinterfaces:

Expression, OrderableExpression

All Known Subinterfaces:

ContentExpression, DateExpression, DimensionReferenceExpression, DocumentReferenceExpression, NumberExpression, ObjectReferenceExpression, StringExpression, UserReferenceExpression
```
public interface ScalarExpression
extends OrderableExpression
```
Base interface for all scalar expressions.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`Predicate`	`isNotNull()`	Returns a predicate specifying that the expression should be NOT NULL (typically present).
`Predicate`	`isNull()`	Returns a predicate specifying that the expression should be NULL (typically missing).

Methods inherited from interface com.iknowbase.api.contentservices.query.content.expressions.Expression
getObjectReference

Methods inherited from interface com.iknowbase.api.contentservices.query.content.expressions.OrderableExpression
asc, desc, order, order

- Method Detail
  - isNull
```
Predicate isNull()
```
    Returns a predicate specifying that the expression should be NULL (typically missing).
    
    Returns:
    
    the Predicate.
  - isNotNull
```
Predicate isNotNull()
```
    Returns a predicate specifying that the expression should be NOT NULL (typically present).
    
    Returns:
    
    the Predicate.