function StatementPrefetch::fetchCol

Overrides StatementInterface::fetchCol

File

core/lib/Drupal/Core/Database/StatementPrefetch.php, line 551

Class

StatementPrefetch

An implementation of StatementInterface that prefetches all data.

Namespace

Code

public function fetchCol($index = 0) {
    if (isset($this->columnNames[$index])) {
        $result = [];
        // Traverse the array as PHP would have done.
        while (isset($this->currentRow)) {
            $result[] = $this->currentRow[$this->columnNames[$index]];
            $this->next();
        }
        return $result;
    }
    else {
        return [];
    }
}