Function rpgffi::tuplesort_begin_datum

pub unsafe extern "C" fn tuplesort_begin_datum(
    datumType: Oid, 
    sortOperator: Oid, 
    sortCollation: Oid, 
    nullsFirstFlag: bool_, 
    workMem: c_int, 
    randomAccess: bool_
) -> *mut Tuplesortstate