function SelectQueryExtender::isNull
| 7.x select.inc | SelectQueryExtender::isNull($field) |
Sets a condition that the specified field be NULL.
Parameters
$field: The name of the field to check.
Return value
QueryConditionInterface The called object.
Overrides QueryConditionInterface::isNull
File
- drupal-7.x/
includes/ database/ select.inc, line 798
Class
- SelectQueryExtender
- The base extender class for Select queries.
Code
function isNull($field) {
$this->query->isNull($field);
return $this;
}