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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision: 297028 $ -->
<!-- splitted from ./en/functions/pgsql.xml, last change in rev 1.2 -->
<refentry xml:id="function.pg-send-prepare" xmlns="http://docbook.org/ns/docbook">
<refnamediv>
<refname>pg_send_prepare</refname>
<refpurpose>Sends a request to create a prepared statement with the given parameters, without waiting for completion.</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type>bool</type><methodname>pg_send_prepare</methodname>
<methodparam><type>resource</type><parameter>connection</parameter></methodparam>
<methodparam><type>string</type><parameter>stmtname</parameter></methodparam>
<methodparam><type>string</type><parameter>query</parameter></methodparam>
</methodsynopsis>
<para>
Sends a request to create a prepared statement with the given parameters,
without waiting for completion.
</para>
<para>
This is an asynchronous version of <function>pg_prepare</function>: it returns &true; if it was able to
dispatch the request, and &false; if not. After a successful call, call
<function>pg_get_result</function> to determine whether the server successfully created the
prepared statement. The function's parameters are handled identically to
<function>pg_prepare</function>. Like <function>pg_prepare</function>, it will not work
on pre-7.4 versions of PostgreSQL.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>connection</parameter></term>
<listitem>
<para>
PostgreSQL database connection resource. When
<parameter>connection</parameter> is not present, the default connection
is used. The default connection is the last connection made by
<function>pg_connect</function> or <function>pg_pconnect</function>.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>stmtname</parameter></term>
<listitem>
<para>
The name to give the prepared statement. Must be unique per-connection. If
"" is specified, then an unnamed statement is created, overwriting any
previously defined unnamed statement.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>query</parameter></term>
<listitem>
<para>
The parameterized SQL statement. Must contain only a single statement.
(multiple statements separated by semi-colons are not allowed.) If any parameters
are used, they are referred to as $1, $2, etc.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>Returns &true; on success, &false; on failure. Use <function>pg_get_result</function>
to determine the query result.</para>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<para>
<example>
<title>Using <function>pg_send_prepare</function></title>
<programlisting role="php">
<![CDATA[
<?php
$dbconn = pg_connect("dbname=publisher") or die("Could not connect");
// Prepare a query for execution
if (!pg_connection_busy($dbconn)) {
pg_send_prepare($dbconn, "my_query", 'SELECT * FROM shops WHERE name = $1');
$res1 = pg_get_result($dbconn);
}
// Execute the prepared query. Note that it is not necessary to escape
// the string "Joe's Widgets" in any way
if (!pg_connection_busy($dbconn)) {
pg_send_execute($dbconn, "my_query", array("Joe's Widgets"));
$res2 = pg_get_result($dbconn);
}
// Execute the same prepared query, this time with a different parameter
if (!pg_connection_busy($dbconn)) {
pg_send_execute($dbconn, "my_query", array("Clothes Clothes Clothes"));
$res3 = pg_get_result($dbconn);
}
?>
]]>
</programlisting>
</example>
</para>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<para>
<simplelist>
<member><function>pg_connect</function></member>
<member><function>pg_pconnect</function></member>
<member><function>pg_execute</function></member>
<member><function>pg_send_execute</function></member>
<member><function>pg_send_query_params</function></member>
</simplelist>
</para>
</refsect1>
</refentry>
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