function Update::execute

Overrides Update::execute

File

core/lib/Drupal/Core/Database/Driver/pgsql/Update.php, line 14

Class

Update

PostgreSQL implementation of \Drupal\Core\Database\Query\Update.

Namespace

Code

public function execute() {
    $max_placeholder = 0;
    $blobs = [];
    $blob_count = 0;
    // Because we filter $fields the same way here and in __toString(), the
    // placeholders will all match up properly.
    $stmt = $this->connection
        ->prepareQuery((string) $this);
    // Fetch the list of blobs and sequences used on that table.
    $table_information = $this->connection
        ->schema()
        ->queryTableInformation($this->table);
    // Expressions take priority over literal fields, so we process those first
    // and remove any literal fields that conflict.
    $fields = $this->fields;
    foreach ($this->expressionFields as $field => $data) {
        if (!empty($data['arguments'])) {
            foreach ($data['arguments'] as $placeholder => $argument) {
                // We assume that an expression will never happen on a BLOB field,
                // which is a fairly safe assumption to make since in most cases
                // it would be an invalid query anyway.
                $stmt->bindParam($placeholder, $data['arguments'][$placeholder]);
            }
        }
        if ($data['expression'] instanceof SelectInterface) {
            $data['expression']->compile($this->connection, $this);
            $select_query_arguments = $data['expression']->arguments();
            foreach ($select_query_arguments as $placeholder => $argument) {
                $stmt->bindParam($placeholder, $select_query_arguments[$placeholder]);
            }
        }
        unset($fields[$field]);
    }
    foreach ($fields as $field => $value) {
        $placeholder = ':db_update_placeholder_' . $max_placeholder++;
        if (isset($table_information->blob_fields[$field])) {
            $blobs[$blob_count] = fopen('php://memory', 'a');
            fwrite($blobs[$blob_count], $value);
            rewind($blobs[$blob_count]);
            $stmt->bindParam($placeholder, $blobs[$blob_count], \PDO::PARAM_LOB);
            ++$blob_count;
        }
        else {
            $stmt->bindParam($placeholder, $fields[$field]);
        }
    }
    if (count($this->condition)) {
        $this->condition
            ->compile($this->connection, $this);
        $arguments = $this->condition
            ->arguments();
        foreach ($arguments as $placeholder => $value) {
            $stmt->bindParam($placeholder, $arguments[$placeholder]);
        }
    }
    $options = $this->queryOptions;
    $options['already_prepared'] = TRUE;
    $options['return'] = Database::RETURN_AFFECTED;
    $this->connection
        ->addSavepoint();
    try {
        $result = $this->connection
            ->query($stmt, [], $options);
        $this->connection
            ->releaseSavepoint();
        return $result;
    } catch (\Exception $e) {
        $this->connection
            ->rollbackSavepoint();
        throw $e;
    }
}