nicowilliams/heimdal — comment on commit 6fce54a5b1f68e3fb6007bb17da5038bb7eb8489
File: base/db.c line 294
By lha:

as in

heim_db_open(const char *dbtype, const char *dbname, .... heim_dict_t options, heim_error_t *error);

and yes, the option might be that the backend must require support for transactions or options to the backend that isn't passed though
for example, tblname could be passed that way