Reads the data for the last tuple for the given
relation, makes it the current tuple and pass it
back as an associative array in
A relation opened by dbplus_open().
Returns DBPLUS_ERR_NOERR on success or a db++ error code on failure.
This function is EXPERIMENTAL. The behaviour of this function, the name of this function, and anything else documented about this function may change without notice in a future release of PHP. Use this function at your own risk.