/**
* @param QueryInterface $query
*
* @return Result|null
* @throws Exception
*/
public function process(QueryInterface $query)
{
if (!$query->isType(QueryInterface::TYPE_ALTER)) {
return null;
}
return $this->getAlterChain()->getResult($query);
}
/**
* @param QueryInterface $query
*
* @return Result|null
* @throws Exception
*/
public function process(QueryInterface $query)
{
if (!$query->isType(QueryInterface::TYPE_CREATE)) {
return null;
}
return $this->getCreateChain()->getResult($query);
}
/**
* QueryDecorator constructor.
*
* @param QueryInterface $decoratedQuery
* @throws Exception
*/
public function __construct(QueryInterface $decoratedQuery)
{
if (!$decoratedQuery->isType(static::TYPE)) {
throw new Exception('Not a ' . static::TYPE . ' query.');
}
$this->decoratedQuery = $decoratedQuery;
}
/**
* @param QueryInterface $query
*
* @return Result|null
* @throws Exception
*/
public function process(QueryInterface $query)
{
if (!$query->isType(QueryInterface::TYPE_SELECT)) {
return null;
}
return $this->getSelectChain()->getResult($query);
}
/**
* @param QueryInterface $query
*
* @return Result|null
* @throws Exception
*/
public function process(QueryInterface $query)
{
/* @var $query SelectQuery */
if (!$query->isType(QueryInterface::TYPE_SELECT)) {
return null;
}
$field = $query->getFirstField();
if ($field->getType() !== Expression::TYPE_FUNCTION || $field->getExpression() !== Expression::EXPR_USER) {
return null;
}
return $this->getResultFromData(self::$data, self::$fields);
}
/**
* @param QueryInterface $query
*
* @return Result|null
* @throws Exception
*/
public function process(QueryInterface $query)
{
if (!$query->isType(QueryInterface::TYPE_USE)) {
return null;
}
$query = new UseQuery($query);
$keyspace = $query->getDbName();
$this->dsn->getConfig()->setKeyspace($keyspace);
if ($this->client instanceof CachingClient) {
$this->client->clearCache();
}
return new EmptyResult();
}
