public function Update::execute

Executes the UPDATE query.

Return value

int|null The number of rows matched by the update query. This includes rows that actually didn't have to be updated because the values didn't change.

Overrides Update::execute

File

core/modules/pgsql/src/Driver/Database/pgsql/Update.php, line 23

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
    ->prepareStatement((string) $this, $this->queryOptions, TRUE);

  // 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.
        $stmt
          ->getClientStatement()
          ->bindParam($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) {
        $stmt
          ->getClientStatement()
          ->bindParam($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]) && $value !== NULL) {
      $blobs[$blob_count] = fopen('php://memory', 'a');
      fwrite($blobs[$blob_count], $value);
      rewind($blobs[$blob_count]);
      $stmt
        ->getClientStatement()
        ->bindParam($placeholder, $blobs[$blob_count], \PDO::PARAM_LOB);
      ++$blob_count;
    }
    else {
      $stmt
        ->getClientStatement()
        ->bindParam($placeholder, $fields[$field]);
    }
  }
  if (count($this->condition)) {
    $this->condition
      ->compile($this->connection, $this);
    $arguments = $this->condition
      ->arguments();
    foreach ($arguments as $placeholder => $value) {
      $stmt
        ->getClientStatement()
        ->bindParam($placeholder, $arguments[$placeholder]);
    }
  }
  $this->connection
    ->addSavepoint();
  try {
    $stmt
      ->execute(NULL, $this->queryOptions);
    $this->connection
      ->releaseSavepoint();
    return $stmt
      ->rowCount();
  } catch (\Exception $e) {
    $this->connection
      ->rollbackSavepoint();
    $this->connection
      ->exceptionHandler()
      ->handleExecutionException($e, $stmt, [], $this->queryOptions);
  }
}