Reads the data for the current tuple for the given
A relation opened by dbplus_open().
The data will be passed back in this parameter, as an associative array.
The function will return zero (aka. 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.