Function lookupKey

src/db.cpp:109–122

Low level key lookup API, not actually called directly from commands * implementations that should instead rely on lookupKeyRead(), * lookupKeyWrite() and lookupKeyReadWithFlags(). */

 * implementations that should instead rely on lookupKeyRead(),
 * lookupKeyWrite() and lookupKeyReadWithFlags(). */
static robj* lookupKey(redisDb *db, robj *key, int flags) {
    auto itr = db->find(key);
    if (itr) {
        robj *val = itr.val();
        lookupKeyUpdateObj(val, flags);
        if (flags & LOOKUP_UPDATEMVCC) {
            setMvccTstamp(val, getMvccTstamp());
            db->trackkey(key, true /* fUpdate */);
        }
        return val;
    } else {
        return NULL;
    }
}
static robj_roptr lookupKeyConst(redisDb *db, robj *key, int flags) {
    serverAssert((flags & LOOKUP_UPDATEMVCC) == 0);
    robj_roptr val;