Function lookupKeyWriteWithFlags

app/redis-6.2.6/src/db.c:160–163

Lookup a key for write operations, and as a side effect, if needed, expires * the key if its TTL is reached. * * Returns the linked value object if the key exists or NULL if the key * does not exist in the specified DB. */

 * Returns the linked value object if the key exists or NULL if the key
 * does not exist in the specified DB. */
robj *lookupKeyWriteWithFlags(redisDb *db, robj *key, int flags) {
    expireIfNeeded(db,key);
    return lookupKey(db,key,flags);
}

robj *lookupKeyWrite(redisDb *db, robj *key) {
    return lookupKeyWriteWithFlags(db, key, LOOKUP_NONE);