doc-fr/reference/maxdb/functions/maxdb-rollback.xml

<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.8 $ -->
<!-- EN-Revision: 1.6 Maintainer: yannick Status: ready -->
<!-- Reviewed: no -->

<refentry xmlns="http://docbook.org/ns/docbook" xml:id="function.maxdb-rollback">
 <refnamediv>
  <refname>maxdb_rollback</refname>
  <refname>maxdb->rollback</refname>
  <refpurpose>Annule la transaction courante</refpurpose>
 </refnamediv>

 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis>
   <type>bool</type><methodname>maxdb_rollback</methodname>
   <methodparam><type>resource</type><parameter>link</parameter></methodparam>
  </methodsynopsis>
  <classsynopsis>
   <ooclass><classname>maxdb</classname></ooclass>
   <methodsynopsis>
    <type>bool</type>
    <methodname>rollback</methodname>
    <void/>
   </methodsynopsis>
  </classsynopsis>
  <para>
   Annule la transaction courante pour la base de données spécifiée par
   le paramètre <parameter>link</parameter>.
  </para>
 </refsect1>

 <refsect1 role="returnvalues">
  &reftitle.returnvalues;
  <para>
   &return.success;
  </para>
 </refsect1>

 <refsect1 role="examples">
  &reftitle.examples;
  <example>
   <title>Style orienté objet</title>
   <programlisting role="php">
<![CDATA[
<?php
$maxdb = new maxdb("localhost", "MONA", "RED", "DEMODB");

/* Vérification de la connexion */
if (maxdb_connect_errno()) {
    printf("Echec de la connexion : %s\n", maxdb_connect_error());
    exit();
}

/* Désactive l'auto-commit */
$maxdb->autocommit(FALSE);

$maxdb->query("CREATE TABLE temp.mycity LIKE hotel.city");
$maxdb->query("INSERT INTO temp.mycity SELECT * FROM hotel.city");

/* Exécution */
$maxdb->commit();

/* Efface toutes les lignes */
$maxdb->query("DELETE FROM temp.mycity");

if ($result = $maxdb->query("SELECT COUNT(*) FROM temp.mycity")) {
    $row = $result->fetch_row();
    printf("%d rows in table mycity.\n", $row[0]);
    /* Free result */
    $result->close();
}

/* Rollback */
$maxdb->rollback();

if ($result = $maxdb->query("SELECT COUNT(*) FROM temp.mycity")) {
    $row = $result->fetch_row();
    printf("%d ligne dans la table mycity (après annulation).\n", $row[0]);
    /* Libération du résultat */
    $result->close();
}

/* Effacement de la table myCity */
$maxdb->query("DROP TABLE temp.mycity");

$maxdb->close();
?>
]]>
   </programlisting>
  </example>
  <example>
   <title>Style procédural</title>
   <programlisting role="php">
<![CDATA[
<?php
$link = maxdb_connect("localhost", "MONA", "RED", "DEMODB");

/* Vérification de la connexion */
if (maxdb_connect_errno()) {
    printf("Echec de la connexion : %s\n", maxdb_connect_error());
    exit();
}

/* Désactive l'auto-commit */
maxdb_autocommit($link, FALSE);

maxdb_query($link, "CREATE TABLE temp.mycity LIKE hotel.city");
maxdb_query($link, "INSERT INTO temp.mycity SELECT * FROM hotel.city");

/* Exécution */
maxdb_commit($link);

/* Efface toutes les lignes */
maxdb_query($link, "DELETE FROM temp.mycity");

if ($result = maxdb_query($link, "SELECT COUNT(*) FROM temp.mycity")) {
    $row = maxdb_fetch_row($result);
    printf("%d ligne dans la table mycity.\n", $row[0]);
    /* Libération du résultats */
    maxdb_free_result($result);
}

/* Annulation */
maxdb_rollback($link);

if ($result = maxdb_query($link, "SELECT COUNT(*) FROM temp.mycity")) {
    $row = maxdb_fetch_row($result);
    printf("%d lignes dans la table mycity (après annulation).\n", $row[0]);
    /* Libération du résultat */
    maxdb_free_result($result);
}

/* Effacement de la table myCity */
maxdb_query($link, "DROP TABLE temp.mycity");

maxdb_close($link);
?>
]]>
   </programlisting>
  </example>
  &example.outputs.similar;
  <screen>
<![CDATA[
0 ligne dans la table mycity.
25 lignes dans la table mycity (après annulation).
]]>
  </screen>
 </refsect1>

 <refsect1 role="seealso">
  &reftitle.seealso;
  <para>
   <simplelist>
    <member><function>maxdb_commit</function></member>
    <member><function>maxdb_autocommit</function></member>
   </simplelist>
  </para>
 </refsect1>

</refentry>

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