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<b>NonexistentCommands: Contents</b><br> <a href="#HGETSET">HGETSET</a><br> <a href="#SET with expire">SET with expire</a><br> <a href="#ZADDNX">ZADDNX</a>
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<h1 class="wikiname">NonexistentCommands</h1>
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A list of commands that don't exist in Redis, but can be accomplished in a different way.
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This is a list of commands that don't exist in Redis, but can be accomplished in a different way, usually by means of <a href="MultiExecCommand.html">WATCH/MULTI/EXEC</a>.<br/><br/>For better performance, you can pipeline multiple commands.<h1><a name="HGETSET">HGETSET</a></h1><a href="GetsetCommand.html">GETSET</a> for Hashes.<br/><br/><pre class="codeblock python" name="code">
WATCH foo
old_value = HGET foo field
MULTI
HSET foo field new_value
EXEC
</pre><h1><a name="SET with expire">SET with expire</a></h1>See <a href="SetexCommand.html">SETEX</a>.<h1><a name="ZADDNX">ZADDNX</a></h1>Add an element to a sorted set, only if the element doesn't already exist (by default, <a href="ZaddCommand.html">ZADD</a> would update the element's score if it already exists). <a href="http://groups.google.com/group/redis-db/browse_thread/thread/fc4c79d72e5bd346/6cdc07ecc36b81e7" target="_blank">See thread</a>.<br/><br/><pre class="codeblock python python" name="code">
WATCH foo
score = ZSCORE foo bar
IF score != NIL
MULTI
ZADD foo 1 bar
EXEC
ENDIF
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