public Select::countQuery()
Get the equivalent COUNT query of this query as a new query object.
\Drupal\Core\Database\Query\SelectInterface A new SelectQuery object with no fields or expressions besides COUNT(*).
Overrides SelectInterface::countQuery
public function countQuery() { $count = $this->prepareCountQuery(); $query = $this->connection->select($count, NULL, $this->queryOptions); $query->addExpression('COUNT(*)'); return $query; }
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https://api.drupal.org/api/drupal/core!lib!Drupal!Core!Database!Query!Select.php/function/Select::countQuery/8.1.x