@@ -139,7 +139,7 @@ class PikaCache : public pstd::noncopyable, public std::enable_shared_from_this<
139139 rocksdb::Status SAddIfKeyExist (std::string& key, std::vector<std::string>& members);
140140 rocksdb::Status SAddnx (std::string& key, std::vector<std::string>& members, int64_t ttl);
141141 rocksdb::Status SAddnxWithoutTTL (std::string& key, std::vector<std::string>& members);
142- rocksdb::Status SCard (std::string& key, uint64_t * len);
142+ rocksdb::Status SCard (const std::string& key, uint64_t * len);
143143 rocksdb::Status SIsmember (std::string& key, std::string& member);
144144 rocksdb::Status SMembers (std::string& key, std::vector<std::string>* members);
145145 rocksdb::Status SRem (std::string& key, std::vector<std::string>& members);
@@ -150,7 +150,7 @@ class PikaCache : public pstd::noncopyable, public std::enable_shared_from_this<
150150 rocksdb::Status ZAddIfKeyExist (std::string& key, std::vector<storage::ScoreMember>& score_members);
151151 rocksdb::Status ZAddnx (std::string& key, std::vector<storage::ScoreMember>& score_members, int64_t ttl);
152152 rocksdb::Status ZAddnxWithoutTTL (std::string& key, std::vector<storage::ScoreMember>& score_members);
153- rocksdb::Status ZCard (std::string& key, uint32_t * len, const std::shared_ptr<DB>& db);
153+ rocksdb::Status ZCard (const std::string& key, uint32_t * len, const std::shared_ptr<DB>& db);
154154 rocksdb::Status ZCount (std::string& key, std::string& min, std::string& max, uint64_t * len, ZCountCmd* cmd);
155155 rocksdb::Status ZIncrby (std::string& key, std::string& member, double increment);
156156 rocksdb::Status ZIncrbyIfKeyExist (std::string& key, std::string& member, double increment, ZIncrbyCmd* cmd, const std::shared_ptr<DB>& db);
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