function.pg-last-oid.html
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html> <head> <title>Returns the last row's OID</title> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> </head> <body><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.pg-last-notice.html">pg_last_notice</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.pg-lo-close.html">pg_lo_close</a></div> <div class="up"><a href="ref.pgsql.html">PostgreSQL Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="function.pg-last-oid" class="refentry"> <div class="refnamediv"> <h1 class="refname">pg_last_oid</h1> <p class="verinfo">(PHP 4 >= 4.2.0, PHP 5)</p><p class="refpurpose"><span class="refname">pg_last_oid</span> — <span class="dc-title">Returns the last row's OID</span></p> </div> <div class="refsect1 description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">string</span> <span class="methodname"><b><b>pg_last_oid</b></b></span> ( <span class="methodparam"><span class="type">resource</span> <tt class="parameter">$result</tt></span> )</div> <p class="para rdfs-comment"> <b>pg_last_oid()</b> is used to retrieve the <var class="varname">OID</var> assigned to an inserted row. </p> <p class="para"> OID field became an optional field from PostgreSQL 7.2 and will not be present by default in PostgreSQL 8.1. When the OID field is not present in a table, the programmer must use <a href="function.pg-result-status.html" class="function">pg_result_status()</a> to check for successful insertion. </p> <p class="para"> To get the value of a <i>SERIAL</i> field in an inserted row, it is necessary to use the PostgreSQL <i>CURRVAL</i> function, naming the sequence whose last value is required. If the name of the sequence is unknown, the <i>pg_get_serial_sequence</i> PostgreSQL 8.0 function is necessary. </p> <p class="para"> PostgreSQL 8.1 has a function <i>LASTVAL</i> that returns the value of the most recently used sequence in the session. This avoids the need for naming the sequence, table or column altogether. </p> <blockquote><p><b class="note">Note</b>: This function used to be called <b>pg_getlastoid()</b>. <br /> </p></blockquote> </div> <div class="refsect1 parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <span class="term"><i><tt class="parameter">result</tt></i></span> <dd> <p class="para"> PostgreSQL query result resource, returned by <a href="function.pg-query.html" class="function">pg_query()</a>, <a href="function.pg-query-params.html" class="function">pg_query_params()</a> or <a href="function.pg-execute.html" class="function">pg_execute()</a> (among others). </p> </dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> A <a href="language.types.string.html" class="type string">string</a> containing the OID assigned to the most recently inserted row in the specified <i><tt class="parameter">connection</tt></i>, or <b><tt>FALSE</tt></b> on error or no available OID. </p> </div> <div class="refsect1 examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example"> <p><b>Example #1 <b>pg_last_oid()</b> example</b></p> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB"><?php<br /> $pgsql_conn </span><span style="color: #007700">= </span><span style="color: #0000BB">pg_connect</span><span style="color: #007700">(</span><span style="color: #DD0000">"dbname=mark host=localhost"</span><span style="color: #007700">);<br /> <br /> </span><span style="color: #0000BB">$res1 </span><span style="color: #007700">= </span><span style="color: #0000BB">pg_query</span><span style="color: #007700">(</span><span style="color: #DD0000">"CREATE TABLE test (a INTEGER) WITH OIDS"</span><span style="color: #007700">);<br /><br /> </span><span style="color: #0000BB">$res2 </span><span style="color: #007700">= </span><span style="color: #0000BB">pg_query</span><span style="color: #007700">(</span><span style="color: #DD0000">"INSERT INTO test VALUES (1)"</span><span style="color: #007700">);<br /> <br /> </span><span style="color: #0000BB">$oid </span><span style="color: #007700">= </span><span style="color: #0000BB">pg_last_oid</span><span style="color: #007700">(</span><span style="color: #0000BB">$res2</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span></span></code></div> </div> </div> </p> </div> <div class="refsect1 seealso"> <h3 class="title">See Also</h3> <p class="para"> <ul class="simplelist"> <li class="member"><a href="function.pg-query.html" class="function" rel="rdfs-seeAlso">pg_query()</a></li> <li class="member"><a href="function.pg-result-status.html" class="function" rel="rdfs-seeAlso">pg_result_status()</a></li> </ul> </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.pg-last-notice.html">pg_last_notice</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.pg-lo-close.html">pg_lo_close</a></div> <div class="up"><a href="ref.pgsql.html">PostgreSQL Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div></body></html>⌨️ 快捷键说明
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