Function SentReplyOnKeyMiss

app/redis-6.2.6/src/db.c:168–176

    return lookupKeyWriteWithFlags(db, key, LOOKUP_NONE);
}
void SentReplyOnKeyMiss(client *c, robj *reply){
    serverAssert(sdsEncodedObject(reply));
    sds rep = reply->ptr;
    if (sdslen(rep) > 1 && rep[0] == '-'){
        addReplyErrorObject(c, reply);
    } else {
        addReply(c,reply);
    }
}
robj *lookupKeyReadOrReply(client *c, robj *key, robj *reply) {
    robj *o = lookupKeyRead(c->db, key);
    if (!o) SentReplyOnKeyMiss(c, reply);