Reads the data for the first tuple for the given
relation, makes it the current tuple and pass it
back as an associative array in tuple.
Return Values
Returns DBPLUS_ERR_NOERR
on success or a db++ error
code on failure.
Notes
Warning: 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.