doc/NonexistentCommands.html

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  18 <!-- This is a (PRE) block.  Make sure it's left aligned or your toc title will be off. -->
  19 <b>NonexistentCommands: Contents</b><br>&nbsp;&nbsp;<a href="#HGETSET">HGETSET</a><br>&nbsp;&nbsp;<a href="#SET with expire">SET with expire</a><br>&nbsp;&nbsp;<a href="#ZADDNX">ZADDNX</a>
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  22                 <h1 class="wikiname">NonexistentCommands</h1>
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  25                     A list of commands that don't exist in Redis, but can be accomplished in a different way.
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  30 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">
  31 WATCH foo
  32 old_value = HGET foo field
  33 MULTI
  34 HSET foo field new_value
  35 EXEC
  36 </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">
  37 WATCH foo
  38 score = ZSCORE foo bar
  39 IF score != NIL
  40   MULTI
  41   ZADD foo 1 bar
  42   EXEC
  43 ENDIF
  44 </pre>
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