Function genericSetKey

src/db.cpp:410–418

High level Set operation. This function can be used in order to set * a key, whatever it was existing or not, to a new object. * * 1) The ref count of the value object is incremented. * 2) clients WATCHing for the destination key notified. * 3) The expire time of the key is reset (the key is made persistent), * unless 'keepttl' is true. * * All the new keys in the database should be cre

 * The client 'c' argument may be set to NULL if the operation is performed
 * in a context where there is no clear client performing the operation. */
void genericSetKey(client *c, redisDb *db, robj *key, robj *val, int keepttl, int signal) {
    db->prepOverwriteForSnapshot(szFromObj(key));
    dict_iter iter;
    if (!dbAddCore(db, szFromObj(key), val, true /* fUpdateMvcc */, false /*fAssumeNew*/, &iter)) {
        dbOverwrite(db, key, val, !keepttl, &iter);
    }
    incrRefCount(val);
    if (signal) signalModifiedKey(c,db,key);
}

/* Common case for genericSetKey() where the TTL is not retained. */
void setKey(client *c, redisDb *db, robj *key, robj *val) {