class NullComparisonExpression extends Node (View source)

NullComparisonExpression ::= (SingleValuedPathExpression | InputParameter) "IS" ["NOT"] "NULL"

Properties

bool $not
Node $expression

Methods

string
dispatch($sqlWalker)

Double-dispatch method, supposed to dispatch back to the walker.

string
__toString()

Dumps the AST Node into a string representation for information purpose only.

from Node
string
dump(object $obj)

No description

from Node
__construct(Node $expression)

No description

Details

string dispatch($sqlWalker)

Double-dispatch method, supposed to dispatch back to the walker.

Implementation is not mandatory for all nodes.

Parameters

$sqlWalker

Return Value

string

Exceptions

ASTException

string __toString()

Dumps the AST Node into a string representation for information purpose only.

Return Value

string

string dump(object $obj)

Parameters

object $obj

Return Value

string

__construct(Node $expression)

Parameters

Node $expression