Method insert

src/db.cpp:2664–2692

}

bool redisDbPersistentData::insert(char *key, robj *o, bool fAssumeNew, dict_iter *piterExisting)
{
    if (!fAssumeNew && (g_pserver->m_pstorageFactory != nullptr || m_pdbSnapshot != nullptr))
        ensure(key);
    dictEntry *de;
    int res = dictAdd(m_pdict, key, o, &de);
    if (!FImplies(fAssumeNew, res == DICT_OK)) {
        serverLog(LL_WARNING,
            "Assumed new key %s existed in DB.", key);
    }
    if (res == DICT_OK)
    {
#ifdef CHECKED_BUILD
        if (m_pdbSnapshot != nullptr && m_pdbSnapshot->find_cached_threadsafe(key) != nullptr)
        {
            serverAssert(dictFind(m_pdictTombstone, key) != nullptr);
        }
#endif
        if (o->FExpires())
            ++m_numexpires;
        trackkey(key, false /* fUpdate */);
    }
    else
    {
        if (piterExisting)
            *piterExisting = dict_iter(m_pdict, de);
    }
    return (res == DICT_OK);
}

// This is a performance tool to prevent us copying over an object we're going to overwrite anyways
void redisDbPersistentData::prepOverwriteForSnapshot(char *key)