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<refentry xml:id="function.ingres-unbuffered-query" xmlns="http://docbook.org/ns/docbook">
 <refnamediv>
  <refname>ingres_unbuffered_query</refname>
  <refpurpose>Send an unbuffered  SQL query to Ingres</refpurpose>
 </refnamediv>
 
 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis>
   <type>mixed</type><methodname>ingres_unbuffered_query</methodname>
   <methodparam><type>resource</type><parameter>link</parameter></methodparam>
   <methodparam><type>string</type><parameter>query</parameter></methodparam>
   <methodparam choice="opt"><type>array</type><parameter>params</parameter></methodparam>
   <methodparam choice="opt"><type>string</type><parameter>types</parameter></methodparam>
  </methodsynopsis>
  <para>
   <function>ingres_unbuffered_query</function> sends the given
   <parameter>query</parameter> to the Ingres server. 
  </para>
  <para>
   The query becomes part of the currently open transaction.  If
   there is no open transaction, <function>ingres_unbuffered_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.
   Ingres allows only a single unbuffered statement to be active at any
   one time. The extension will close any active unbuffered statements before
   executing any SQL. In addition you cannot use
   <function>ingres_result_seek</function> to position the row before
   fetching.
  </para>

  <note>
   <title>Related Configurations</title>
   <para>
    See also the <link linkend="ini.ingres.describe">ingres.describe</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 <emphasis>SQL reference
       guide</emphasis>) 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 that cannot be executed via
       <function>ingres_unbuffered_query</function>.
      </para>
      <para>
       Data inside the query should be <link
       linkend="function.ingres-escape-string">properly escaped</link>.
      </para>
     </listitem>
    </varlistentry>
    <varlistentry>
     <term><parameter>params</parameter></term>
     <listitem>
      <para>
       An array of parameter values to be used with the query
      </para>
     </listitem>
    </varlistentry>
    <varlistentry>
     <term><parameter>types</parameter></term>
     <listitem>
      <para>
       A string containing a sequence of types for the parameter values
       passed. See the <link
       linkend="function.ingres-query.types">types</link> parameter in
       <function>ingres_query</function> for the list of type codes.
      </para>
     </listitem>
    </varlistentry>
   </variablelist>
  </para>
 </refsect1>

 <refsect1 role="returnvalues">
  &reftitle.returnvalues;
  <para>
   <function>ingres_unbuffered_query</function> returns a query result identifier when
   there are rows to fetch; else it returns &false; when there are no rows, as
   is the case of an INSERT, UPDATE, or DELETE statement. 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>Issue a simple un-buffered select</title>
    <programlisting role="php">
<![CDATA[
<?php
$link = ingres_connect("demodb");

$result = ingres_unbuffered_query($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_unbuffered_query</function></title>
    <programlisting role="php">
<![CDATA[
<?php
$link = ingres_connect("demodb");

$params[] = "Emma";
$query = "select * from user_profile where up_first = ?";
$result = ingres_unbuffered_query($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 = ?";
$result = ingres_unbuffered_query($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_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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