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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision: 297028 $ -->
<refentry xml:id="function.ingres-prepare" xmlns="http://docbook.org/ns/docbook">
<refnamediv>
<refname>ingres_prepare</refname>
<refpurpose>Prepare a query for later execution</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type>mixed</type><methodname>ingres_prepare</methodname>
<methodparam><type>resource</type><parameter>link</parameter></methodparam>
<methodparam><type>string</type><parameter>query</parameter></methodparam>
</methodsynopsis>
<para>
Prepares a query for execution by <function>ingres_execute</function>.
</para>
<para>
The query becomes part of the currently open transaction. If
there is no open transaction, <function>ingres_query</function>
opens a new transaction. To close the transaction, you can
call either <function>ingres_commit</function> to commit the changes
made to the database or <function>ingres_rollback</function> to
cancel these changes. When the script ends, any open transaction
is rolled back (by calling
<function>ingres_rollback</function>). You can also use
<function>ingres_autocommit</function> before opening a new
transaction to have every SQL query immediately committed.
</para>
<note>
<title>Related Configurations</title>
<para>
See also the <link linkend="ini.ingres.describe">ingres.describe</link>,
<link linkend="ini.ingres.scrollable">ingres.scrollable</link> and
<link linkend="ini.ingres.utf8">ingres.utf8</link> directives in
<link linkend="ingres.configuration">Runtime Configuration</link>.
</para>
</note>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>link</parameter></term>
<listitem>
<para>
The connection link identifier
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>query</parameter></term>
<listitem>
<para>
A valid SQL query (see the Ingres <literal>SQL reference
guide</literal>) in the Ingres documentation.
See the <link linkend="function.ingres-query.query">query</link>
parameter in <function>ingres_query</function> for a list of SQL
statements which cannot be executed using
<function>ingres_prepare</function>
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
<function>ingres_prepare</function> returns a query result identifier that
is used with <function>ingres_execute</function> to execute the query. To see
if an error occurred, use <function>ingres_errno</function>,
<function>ingres_error</function>, or
<function>ingres_errsqlstate</function>.
</para>
</refsect1>
<!--
<refsect1 role="examples">
&reftitle.examples;
<para>
<example>
<title>A simple select using <function>ingres_query</function></title>
<programlisting role="php">
<![CDATA[
<?php
$link = ingres_connect("demodb");
$result = ingres_query($link, "select * from user_profile");
while ($row = ingres_fetch_row($result)) {
echo $row[1];
echo $row[2];
}
?>
]]>
</programlisting>
</example>
<example>
<title>Passing query parameters to <function>ingres_query</function></title>
<programlisting role="php">
<![CDATA[
<?php
$link = ingres_connect("demodb");
$params[] = "Emma";
$query = "select * from user_profile where up_first = ?";
$result = ingres_query($link, $query, $params);
while ($row = ingres_fetch_row($result)) {
echo $row[1];
echo $row[2];
}
?>
]]>
</programlisting>
</example>
<example>
<title>Inserting a BLOB with parameter types</title>
<programlisting role="php">
<![CDATA[
<?php
$link = ingres_connect("demodb");
//Open a photo
$fh = fopen("photo.jpg","r");
$blob_data = stream_get_contents($fh);
fclose($fh);
//Prepare parameters
$params[] = $blob_data;
$params[] = 1201;
//Define parameter types
$param_types = "Bi";
$query = "update user_profile set up_image = ? where up_id = ?";
$result = ingres_query($link, $query , $params, $param_types);
if (ingres_errno())
{
echo ingres_errno() . "-" . ingres_error() . "\n";
}
?>
]]>
</programlisting>
</example>
</para>
</refsect1>
-->
<refsect1 role="seealso">
&reftitle.seealso;
<para>
<simplelist>
<member><function>ingres_unbuffered_query</function></member>
<member><function>ingres_fetch_array</function></member>
<member><function>ingres_fetch_assoc</function></member>
<member><function>ingres_fetch_object</function></member>
<member><function>ingres_fetch_row</function></member>
<member><function>ingres_commit</function></member>
<member><function>ingres_rollback</function></member>
<member><function>ingres_autocommit</function></member>
<member><function>ingres_set_environment</function></member>
<member><function>ingres_errno</function></member>
<member><function>ingres_error</function></member>
</simplelist>
</para>
</refsect1>
</refentry>
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sgml-minimize-attributes:nil
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-->
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