Function dbOverwrite

src/db.cpp:363–373

Overwrite an existing key with a new value. Incrementing the reference * count of the new value is up to the caller. * This function does not modify the expire time of the existing key. * * The program is aborted if the key was not already present. */

 *
 * The program is aborted if the key was not already present. */
void dbOverwrite(redisDb *db, robj *key, robj *val, bool fRemoveExpire, dict_iter *pitrExisting) {
    redisDb::iter itr;
    if (pitrExisting != nullptr)
        itr = *pitrExisting;
    else
        itr = db->find(key);

    serverAssertWithInfo(NULL,key,itr != nullptr);
    lookupKeyUpdateObj(itr.val(), LOOKUP_NONE);
    db->dbOverwriteCore(itr, szFromObj(key), val, !!g_pserver->fActiveReplica, fRemoveExpire);
}

/* Insert a key, handling duplicate keys according to fReplace */
int dbMerge(redisDb *db, sds key, robj *val, int fReplace)