IsNullPredicate (Exasol SQL Statement Builder 4.5.3 API)

java.lang.Object
- com.exasol.sql.expression.predicate.AbstractPredicate
- - com.exasol.sql.expression.predicate.IsNullPredicate

All Implemented Interfaces:

BooleanExpression, Predicate, ValueExpression
```
public class IsNullPredicate
extends AbstractPredicate
```
A class that represents a IS [NOT] NULL predicate.

Nested Class Summary

Nested Classes
Modifier and Type Class Description

static class IsNullPredicate.IsNullPredicateOperator
An operator for IsNullPredicate class.

Constructor Summary

Constructors
Constructor	Description
`IsNullPredicate(IsNullPredicate.IsNullPredicateOperator operator, ValueExpression operand)`	Creates a new instance of `IsNullPredicate` for `IS [NOT] NULL` predicate.
`IsNullPredicate(ValueExpression operand)`	Creates a new instance of `IsNullPredicate` for `IS NULL` predicate.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`accept(PredicateVisitor visitor)`	Accepts `PredicateVisitor`.
`ValueExpression`	`getOperand()`	Returns the value expression to be checked for `null`.

Methods inherited from class com.exasol.sql.expression.predicate.AbstractPredicate
accept, accept, getOperator

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - IsNullPredicate
```
public IsNullPredicate(ValueExpression operand)
```
    Creates a new instance of IsNullPredicate for IS NULL predicate.
    
    Parameters:
    
    operand - value expression to check for null
  - IsNullPredicate
```
public IsNullPredicate(IsNullPredicate.IsNullPredicateOperator operator,
                       ValueExpression operand)
```
    Creates a new instance of IsNullPredicate for IS [NOT] NULL predicate.
    
    Parameters:
    
    operator - predicate operator
    
    operand - value expression to check for null
- Method Detail
  - getOperand
```
public ValueExpression getOperand()
```
    Returns the value expression to be checked for null.
    
    Returns:
    
    value expression operand
  - accept
```
public void accept(PredicateVisitor visitor)
```
    Description copied from interface: Predicate
    
    Accepts PredicateVisitor.
    
    Parameters:
    
    visitor - predicate visitor to accept