SqlPredicateIsNull (Common module of Exasol Virtual Schemas Adapters 17.1.2 API)

java.lang.Object
- com.exasol.adapter.sql.SqlNode
- - com.exasol.adapter.sql.SqlPredicate
  - - com.exasol.adapter.sql.SqlPredicateIsNull

public class SqlPredicateIsNull
extends SqlPredicate

The type Sql predicate is null.

Constructor Summary

Constructors
Constructor Description

SqlPredicateIsNull(SqlNode expression)
Instantiates a new Sql predicate is null.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`<R> R`	`accept(SqlNodeVisitor<R> visitor)`	See `SqlNodeVisitor`
`List<SqlNode>`	`getChildren()`	Get list of node's children (possibly, empty).
`SqlNode`	`getExpression()`	Gets expression.
`SqlNodeType`	`getType()`	Gets type.

Methods inherited from class com.exasol.adapter.sql.SqlPredicate
getFunction

Methods inherited from class com.exasol.adapter.sql.SqlNode
getParent, hasParent, setParent

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

- Constructor Detail
  - SqlPredicateIsNull
```
public SqlPredicateIsNull(SqlNode expression)
```
    Instantiates a new Sql predicate is null.
    
    Parameters:
    
    expression - the expression
- Method Detail
  - getExpression
```
public SqlNode getExpression()
```
    Gets expression.
    
    Returns:
    
    the expression
  - getType
```
public SqlNodeType getType()
```
    Description copied from class: SqlNode
    
    Gets type.
    
    Specified by:
    
    getType in class SqlNode
    
    Returns:
    
    the type
  - accept
```
public <R> R accept(SqlNodeVisitor<R> visitor)
             throws AdapterException
```
    Description copied from class: SqlNode
    
    See SqlNodeVisitor
    
    Specified by:
    
    accept in class SqlNode
    
    Type Parameters:
    
    R - generic SqlNodeVisitor type
    
    Parameters:
    
    visitor - The visitor object on which the appropriate visit(sqlNode) method is called
    
    Returns:
    
    visited object
    
    Throws:
    
    AdapterException - can be thrown
  - getChildren
```
public List<SqlNode> getChildren()
```
    Description copied from class: SqlNode
    
    Get list of node's children (possibly, empty).
    
    Overrides:
    
    getChildren in class SqlNode
    
    Returns:
    
    list of children nodes (which could be null)