Implements QueryConditionInterface::isNull().

Parameters

$field: The name of the field to check.

Return value

QueryConditionInterface The called object.

Overrides QueryConditionInterface::isNull

File

includes/database/query.inc, line 1562

Class

MergeQuery

General class for an abstracted MERGE query operation.

Code

public function isNull($field) {
 $this->condition 
 ->isNull ($field);
 return $this;
}

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