function toDialectString(IDialect $dialect)
{
$compiledSlices = array();
$compiledSlices[] = '(';
$compiledSlices[] = $this->subject->toDialectString($dialect);
$compiledSlices[] = ')';
$compiledSlices[] = $this->operator->toDialectString($dialect);
$compiledString = join(' ', $compiledSlices);
return $compiledString;
}
/**
* Creates an instance of binary expression node, representing the construction: subject IS FALSE
*
* @param mixed $subject logical subject
*
* SQL example:
* @code
* // "hasSmth" IS FALSE
* Expression::isFalse("hasSmth");
* @endcode
* @return UnaryPostfixExpression
*/
static function isFalse($subject)
{
return new UnaryPostfixExpression($subject, UnaryPostfixLogicalOperator::isFalse());
}