/**
* Clear data from the query or a specific clause of the query.
*
* @param string $clause Optionally, the name of the clause to clear, or nothing to clear the whole query.
*
* @return void
*
* @since 11.3
*/
public function clear($clause = null)
{
switch ($clause) {
case 'limit':
$this->limit = null;
break;
case 'offset':
$this->offset = null;
break;
case 'forUpdate':
$this->forUpdate = null;
break;
case 'forShare':
$this->forShare = null;
break;
case 'noWait':
$this->noWait = null;
break;
case 'returning':
$this->returning = null;
break;
case 'select':
case 'update':
case 'delete':
case 'insert':
case 'from':
case 'join':
case 'set':
case 'where':
case 'group':
case 'having':
case 'order':
case 'columns':
case 'values':
parent::clear($clause);
break;
default:
$this->type = null;
$this->limit = null;
$this->offset = null;
$this->forUpdate = null;
$this->forShare = null;
$this->noWait = null;
$this->returning = null;
parent::clear($clause);
break;
}
return $this;
}
