[redis.git] / doc / MsetCommand.html


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<!-- This is a (PRE) block.  Make sure it's left aligned or your toc title will be off. -->
<b>MsetCommand: Contents</b><br>&nbsp;&nbsp;<a href="#MSET _key1_ _value1_ _key2_ _value2_ ... _keyN_ _valueN_ (Redis &gt;">MSET _key1_ _value1_ _key2_ _value2_ ... _keyN_ _valueN_ (Redis &gt;</a><br>&nbsp;&nbsp;<a href="#MSETNX _key1_ _value1_ _key2_ _value2_ ... _keyN_ _valueN_ (Redis &gt;">MSETNX _key1_ _value1_ _key2_ _value2_ ... _keyN_ _valueN_ (Redis &gt;</a><br>&nbsp;&nbsp;&nbsp;&nbsp;<a href="#MSET Return value">MSET Return value</a><br>&nbsp;&nbsp;&nbsp;&nbsp;<a href="#MSETNX Return value">MSETNX Return value</a>
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                <h1 class="wikiname">MsetCommand</h1>

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                    &iuml;&raquo;&iquest;#sidebar <a href="StringCommandsSidebar.html">StringCommandsSidebar</a><h1><a name="MSET _key1_ _value1_ _key2_ _value2_ ... _keyN_ _valueN_ (Redis &gt;">MSET _key1_ _value1_ _key2_ _value2_ ... _keyN_ _valueN_ (Redis &gt;</a></h1> 1.1) =
<h1><a name="MSETNX _key1_ _value1_ _key2_ _value2_ ... _keyN_ _valueN_ (Redis &gt;">MSETNX _key1_ _value1_ _key2_ _value2_ ... _keyN_ _valueN_ (Redis &gt;</a></h1> 1.1) =
<i>Time complexity: O(1) to set every key</i><blockquote>Set the the respective keys to the respective values. MSET will replace oldvalues with new values, while MSETNX will not perform any operation at alleven if just a single key already exists.</blockquote>
<blockquote>Because of this semantic MSETNX can be used in order to set different keysrepresenting different fields of an unique logic object in a way thatensures that either all the fields or none at all are set.</blockquote>
<blockquote>Both MSET and MSETNX are atomic operations. This means that for instanceif the keys A and B are modified, another client talking to Redis can eithersee the changes to both A and B at once, or no modification at all.</blockquote>
<h2><a name="MSET Return value">MSET Return value</a></h2><a href="ReplyTypes.html">Status code reply</a> Basically +OK as MSET can't fail<h2><a name="MSETNX Return value">MSETNX Return value</a></h2><a href="ReplyTypes.html">Integer reply</a>, specifically:<br/><br/><pre class="codeblock python" name="code">
1 if the all the keys were set
0 if no key was set (at least one key already existed)
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924aa408	1
	2	<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN">
	3	<html>
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	5	<link type="text/css" rel="stylesheet" href="style.css" />
	6	</head>
	7	<body>
	8	<div id="page">
	9
	10	<div id='header'>
	11	<a href="index.html">
	12	<img style="border:none" alt="Redis Documentation" src="redis.png">
	13	</a>
	14	</div>
	15
	16	<div id="pagecontent">
	17	<div class="index">
	18	<!-- This is a (PRE) block. Make sure it's left aligned or your toc title will be off. -->
43f30ac0	19	<b>MsetCommand: Contents</b><br>  <a href="#MSET _key1_ _value1_ _key2_ _value2_ ... _keyN_ _valueN_ (Redis >">MSET _key1_ _value1_ _key2_ _value2_ ... _keyN_ _valueN_ (Redis ></a><br>  <a href="#MSETNX _key1_ _value1_ _key2_ _value2_ ... _keyN_ _valueN_ (Redis >">MSETNX _key1_ _value1_ _key2_ _value2_ ... _keyN_ _valueN_ (Redis ></a><br>    <a href="#MSET Return value">MSET Return value</a><br>    <a href="#MSETNX Return value">MSETNX Return value</a>
924aa408	20	</div>
	21
	22	<h1 class="wikiname">MsetCommand</h1>
	23
	24	<div class="summary">
	25
	26	</div>
	27
	28	<div class="narrow">
43f30ac0	29	ï»¿#sidebar <a href="StringCommandsSidebar.html">StringCommandsSidebar</a><h1><a name="MSET _key1_ _value1_ _key2_ _value2_ ... _keyN_ _valueN_ (Redis >">MSET _key1_ _value1_ _key2_ _value2_ ... _keyN_ _valueN_ (Redis ></a></h1> 1.1) =
924aa408	30	<h1><a name="MSETNX _key1_ _value1_ _key2_ _value2_ ... _keyN_ _valueN_ (Redis >">MSETNX _key1_ _value1_ _key2_ _value2_ ... _keyN_ _valueN_ (Redis ></a></h1> 1.1) =
163f4b8c	31	<i>Time complexity: O(1) to set every key</i><blockquote>Set the the respective keys to the respective values. MSET will replace oldvalues with new values, while MSETNX will not perform any operation at alleven if just a single key already exists.</blockquote>
924aa408	32	<blockquote>Because of this semantic MSETNX can be used in order to set different keysrepresenting different fields of an unique logic object in a way thatensures that either all the fields or none at all are set.</blockquote>
	33	<blockquote>Both MSET and MSETNX are atomic operations. This means that for instanceif the keys A and B are modified, another client talking to Redis can eithersee the changes to both A and B at once, or no modification at all.</blockquote>
	34	<h2><a name="MSET Return value">MSET Return value</a></h2><a href="ReplyTypes.html">Status code reply</a> Basically +OK as MSET can't fail<h2><a name="MSETNX Return value">MSETNX Return value</a></h2><a href="ReplyTypes.html">Integer reply</a>, specifically:<br/><br/><pre class="codeblock python" name="code">
	35	1 if the all the keys were set
	36	0 if no key was set (at least one key already existed)
43f30ac0	37	</pre>
924aa408	38	</div>
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