Compiles and returns an associative array of the arguments for this prepared statement.
$queryPlaceholder: When collecting the arguments of a subquery, the main placeholder object should be passed as this parameter.
An associative array of all placeholder arguments for this query.
Overrides SelectQueryInterface::getArguments
public function getArguments(QueryPlaceholderInterface $queryPlaceholder = NULL) {
  if (!isset($queryPlaceholder)) {
    $queryPlaceholder = $this;
  }
  $this
    ->compile($this->connection, $queryPlaceholder);
  return $this
    ->arguments();
}