Function db_rollback

lua/sp.c:2710–2722

}

static int db_rollback(Lua L)
{
    luaL_checkudata(L, 1, dbtypes.db);
    SP sp = getsp(L);
    reset_consumer_cursor(sp);
    if (sp->in_parent_trans) { // explicit commit w/o begin
        return luaL_error(L, no_transaction());
    }
    int rc;          // rollback rc
    const char *err; // logic err - terminate lua prog
    if ((err = db_rollback_int(L, &rc)) == NULL) return push_and_return(L, rc);
    return luaL_error(L, err);
}

static const char *db_begin_int(Lua L, int *rc)
{