NullIfExpression (presto-parser 0.55 API)

```
public class NullIfExpression
extends Expression
```
NULLIF(V1,V2): CASE WHEN V1=V2 THEN NULL ELSE V1 END

Constructors
Constructor and Description
`NullIfExpression(Expression first, Expression second)`

Methods
Modifier and Type	Method and Description
`<R,C> R`	`accept(AstVisitor<R,C> visitor, C context)`
`boolean`	`equals(Object o)`
`Expression`	`getFirst()`
`Expression`	`getSecond()`
`int`	`hashCode()`

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

public NullIfExpression(Expression first,
                Expression second)

public <R,C> R accept(AstVisitor<R,C> visitor,
             C context)

Class NullIfExpression