<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <title>Execute SHARED LOCK</title> </head> <body><div class="manualnavbar" style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="mysql-xdevapi-tableselect.lockexclusive.html">TableSelect::lockExclusive</a></div> <div class="next" style="text-align: right; float: right;"><a href="mysql-xdevapi-tableselect.offset.html">TableSelect::offset</a></div> <div class="up"><a href="class.mysql-xdevapi-tableselect.html">mysql_xdevapi\TableSelect</a></div> <div class="home"><a href="index.html">PHP Manual</a></div> </div><hr /><div id="mysql-xdevapi-tableselect.lockshared" class="refentry"> <div class="refnamediv"> <h1 class="refname">TableSelect::lockShared</h1> <p class="verinfo">(No version information available, might only be in Git)</p><p class="refpurpose"><span class="refname">TableSelect::lockShared</span> — <span class="dc-title">Execute SHARED LOCK</span></p> </div> <div class="refsect1 description" id="refsect1-mysql-xdevapi-tableselect.lockshared-description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="modifier">public</span> <span class="type"><span class="type mysql_xdevapi\TableSelect">mysql_xdevapi\TableSelect</span></span> <span class="methodname"><strong>mysql_xdevapi\TableSelect::lockShared</strong></span> ([ <span class="methodparam"><span class="type">integer</span> <code class="parameter">$lock_waiting_option</code></span> ] )</div> <p class="para rdfs-comment"> Execute a read operation with SHARED LOCK. Only one lock can be active at a time. </p> </div> <div class="refsect1 parameters" id="refsect1-mysql-xdevapi-tableselect.lockshared-parameters"> <h3 class="title">Parameters</h3> <dl> <dt> <code class="parameter">lock_waiting_option</code></dt> <dd> <p class="para"> The optional waiting option that defaults to <strong><code>MYSQLX_LOCK_DEFAULT</code></strong>. Valid values are: </p> <ul class="itemizedlist"> <li class="listitem"><p class="para"><strong><code>MYSQLX_LOCK_DEFAULT</code></strong></p></li> <li class="listitem"><p class="para"><strong><code>MYSQLX_LOCK_NOWAIT</code></strong></p></li> <li class="listitem"><p class="para"><strong><code>MYSQLX_LOCK_SKIP_LOCKED</code></strong></p></li> </ul> </dd> </dl> </div> <div class="refsect1 returnvalues" id="refsect1-mysql-xdevapi-tableselect.lockshared-returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> A TableSelect object. </p> </div> <div class="refsect1 examples" id="refsect1-mysql-xdevapi-tableselect.lockshared-examples"> <h3 class="title">Examples</h3> <div class="example" id="example-2151"> <p><strong>Example #1 <span class="function"><strong>mysql_xdevapi\TableSelect::lockShared()</strong></span> example</strong></p> <div class="example-contents"> <div class="phpcode"><code><span style="color: #000000"> <span style="color: #0000BB"><?php<br />$session </span><span style="color: #007700">= </span><span style="color: #0000BB">mysql_xdevapi</span><span style="color: #007700">\</span><span style="color: #0000BB">getSession</span><span style="color: #007700">(</span><span style="color: #DD0000">"mysqlx://user:password@localhost"</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">$schema </span><span style="color: #007700">= </span><span style="color: #0000BB">$session</span><span style="color: #007700">-></span><span style="color: #0000BB">getSchema</span><span style="color: #007700">(</span><span style="color: #DD0000">"addressbook"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$table </span><span style="color: #007700">= </span><span style="color: #0000BB">$schema</span><span style="color: #007700">-></span><span style="color: #0000BB">getTable</span><span style="color: #007700">(</span><span style="color: #DD0000">"names"</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">$session</span><span style="color: #007700">-></span><span style="color: #0000BB">startTransaction</span><span style="color: #007700">();<br /><br /></span><span style="color: #0000BB">$result </span><span style="color: #007700">= </span><span style="color: #0000BB">$table</span><span style="color: #007700">-></span><span style="color: #0000BB">select</span><span style="color: #007700">(</span><span style="color: #DD0000">'name'</span><span style="color: #007700">, </span><span style="color: #DD0000">'age'</span><span style="color: #007700">)<br /> -></span><span style="color: #0000BB">lockShared</span><span style="color: #007700">(</span><span style="color: #0000BB">MYSQLX_LOCK_NOWAIT</span><span style="color: #007700">)<br /> -></span><span style="color: #0000BB">execute</span><span style="color: #007700">();<br /><br /></span><span style="color: #0000BB">$session</span><span style="color: #007700">-></span><span style="color: #0000BB">commit</span><span style="color: #007700">();<br /><br /></span><span style="color: #0000BB">$row </span><span style="color: #007700">= </span><span style="color: #0000BB">$result</span><span style="color: #007700">-></span><span style="color: #0000BB">fetchAll</span><span style="color: #007700">();<br /></span><span style="color: #0000BB">print_r</span><span style="color: #007700">(</span><span style="color: #0000BB">$row</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span> </span> </code></div> </div> <div class="example-contents"><p>The above example will output something similar to:</p></div> <div class="example-contents screen"> <div class="cdata"><pre> Array ( [0] => Array ( [name] => John [age] => 42 ) [1] => Array ( [name] => Sam [age] => 42 ) ) </pre></div> </div> </div> </div> </div><hr /><div class="manualnavbar" style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="mysql-xdevapi-tableselect.lockexclusive.html">TableSelect::lockExclusive</a></div> <div class="next" style="text-align: right; float: right;"><a href="mysql-xdevapi-tableselect.offset.html">TableSelect::offset</a></div> <div class="up"><a href="class.mysql-xdevapi-tableselect.html">mysql_xdevapi\TableSelect</a></div> <div class="home"><a href="index.html">PHP Manual</a></div> </div></body></html>