of records to batch in the buffer.
 * @return mixed Returns a MS SQL result resource on success, TRUE if no rows were
 * returned.
 * @throws MssqlException
 *
 */
function mssql_query(string $query, $link_identifier = null, int $batch_size = 0)
{
    error_clear_last();
    if ($batch_size !== 0) {
        $result = \mssql_query($query, $link_identifier, $batch_size);
    } elseif ($link_identifier !== null) {
        $result = \mssql_query($query, $link_identifier);
    } else {
        $result = \mssql_query($query);
    }
    if ($result === false) {
        throw MssqlException::createFromPhpError();
    }
    return $result;
}


/**
 * mssql_select_db sets the current active
 * database on the server that's associated with the specified link
 * identifier.
 *
 * Every subsequent call to mssql_query will be
 * made on the active database.
 *
 * @param string $database_name The database name.
 *
 * To escape the name of a database that contains spaces, hyphens ("-"),
 * or any other exceptional characters, the database name must be
 * enclosed in brackets, as is shown in the example, below. This
 * technique must also be applied when selecting a database name that is
 * also a reserved word (such as primary).
 * @param resource $link_identifier A MS SQL link identifier, returned by
 * mssql_connect or
 * mssql_pconnect.
 *
 * If no link identifier is specified, the last opened link is assumed.
 * If no link is open, the function will try to establish a link as if
 * mssql_connect was called, and use it.
 * @throws MssqlException
 *
 */
function mssql_select_db(string $database_name, $link_identifier = null): void
{
    error_clear_last();
    if ($link_identifier !== null) {
        $result = \mssql_select_db($database_name, $link_identifier);
    } else {
        $result = \mssql_select_db($database_name);
    }
    if ($result === false) {
        throw MssqlException::createFromPhpError();
    }
}