CEntityQuery::registerRuntimeField

public function registerRuntimeField($name, $fieldInfo)
{
	$field = $this->init_entity->initializeField($name, $fieldInfo);

	$chain = new CEntityQueryChain;
	$chain->addElement(new CEntityQueryChainElement($this->init_entity));
	$chain->addElement(new CEntityQueryChainElement($field));

	// add
	$this->registerChain('runtime', $chain);
}