NonexistentCommands

- -

- A list of commands that don't exist in Redis, but can be accomplished in a different way. -

- -

- -This is a list of commands that don't exist in Redis, but can be accomplished in a different way, usually by means of WATCH/MULTI/EXEC.

For better performance, you can pipeline multiple commands.

HGETSET

GETSET for Hashes.

-WATCH foo
-old_value = HGET foo field
-MULTI
-HSET foo field new_value
-EXEC
-

SET with expire

See SETEX.

ZADDNX

Add an element to a sorted set, only if the element doesn't already exist (by default, ZADD would update the element's score if it already exists). See thread.

-WATCH foo
-score = ZSCORE foo bar
-IF score != NIL
-  MULTI
-  ZADD foo 1 bar
-  EXEC
-ENDIF
-

- -