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.
dbplus_rcrtexact() will create an empty copy
of the given relation under a new
name, but with default indices. An
existing relation by the same name will
only be overwritten if overwrite is TRUE
and no other process is currently using the relation.