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<rss version="0.92" >
<channel>
    <title>Doctrine Project</title>
    <link>http://www.doctrine-project.org/jira</link>
    <description>This file is an XML representation of an issue</description>
    <language>en-us</language>    <build-info>
        <version>5.2.7</version>
        <build-number>850</build-number>
        <build-date>21-02-2013</build-date>
    </build-info>

<item>
            <title>[DDC-1149] Optimize OneToMany and ManyToMany without join</title>
                <link>http://www.doctrine-project.org/jira/browse/DDC-1149</link>
                <project id="10032" key="DDC">Doctrine 2 - ORM</project>
                        <description>&lt;div class=&quot;code panel&quot; style=&quot;border-width: 1px;&quot;&gt;&lt;div class=&quot;codeContent panelContent&quot;&gt;
&lt;pre class=&quot;code-java&quot;&gt; 
/**
 * @Entity
 * @Table(name=&lt;span class=&quot;code-quote&quot;&gt;&quot;users&quot;&lt;/span&gt;)
 */
class User {

    /**
     * @Column
     * @Id
     */
    &lt;span class=&quot;code-keyword&quot;&gt;public&lt;/span&gt; $user_id;

    /**
     * @Column
     */
    &lt;span class=&quot;code-keyword&quot;&gt;public&lt;/span&gt; $email;

    /**
     * @OneToMany(targetEntity=&lt;span class=&quot;code-quote&quot;&gt;&quot;Language&quot;&lt;/span&gt;, mappedBy=&lt;span class=&quot;code-quote&quot;&gt;&quot;user&quot;&lt;/span&gt;,fetch=&lt;span class=&quot;code-quote&quot;&gt;&quot;EAGER&quot;&lt;/span&gt;)
     */
    &lt;span class=&quot;code-keyword&quot;&gt;public&lt;/span&gt; $languages;

}

/**
 * @Entity
 * @Table(name=&lt;span class=&quot;code-quote&quot;&gt;&quot;user_languages&quot;&lt;/span&gt;)
 */
class Language {

    /**
     * @Column
     * @Id
     */
    &lt;span class=&quot;code-keyword&quot;&gt;public&lt;/span&gt; $user_language_id;

    /**
     * @ManyToOne(targetEntity=&lt;span class=&quot;code-quote&quot;&gt;&quot;User&quot;&lt;/span&gt;, inversedBy=&lt;span class=&quot;code-quote&quot;&gt;&quot;languages&quot;&lt;/span&gt;)
     * @JoinColumn(name=&lt;span class=&quot;code-quote&quot;&gt;&quot;user_id&quot;&lt;/span&gt;, referencedColumnName=&lt;span class=&quot;code-quote&quot;&gt;&quot;user_id&quot;&lt;/span&gt;)
     */
    &lt;span class=&quot;code-keyword&quot;&gt;public&lt;/span&gt; $user;

    /**
     * @Column
     */
    &lt;span class=&quot;code-keyword&quot;&gt;public&lt;/span&gt; $user_id;
}
&lt;/pre&gt;
&lt;/div&gt;&lt;/div&gt;

&lt;div class=&quot;code panel&quot; style=&quot;border-width: 1px;&quot;&gt;&lt;div class=&quot;codeContent panelContent&quot;&gt;
&lt;pre class=&quot;code-java&quot;&gt;$users = $em-&amp;gt;getRepository(&apos;User&apos;)-&amp;gt;findAll();
&lt;/pre&gt;
&lt;/div&gt;&lt;/div&gt;
&lt;p&gt;Result:&lt;/p&gt;
&lt;div class=&quot;code panel&quot; style=&quot;border-width: 1px;&quot;&gt;&lt;div class=&quot;codeContent panelContent&quot;&gt;
&lt;pre class=&quot;code-java&quot;&gt;SELECT t0.user_id AS user_id1, t0.email AS email2 FROM users t0
SELECT t0.user_language_id AS user_language_id1, t0.user_id AS user_id2, t0.user_id AS user_id3 FROM user_languages t0 WHERE t0.user_id = ?
array(1) {
  [0]=&amp;gt;
  string(1) &lt;span class=&quot;code-quote&quot;&gt;&quot;1&quot;&lt;/span&gt;
}
array(1) {
  [0]=&amp;gt;
  NULL
}
SELECT t0.user_language_id AS user_language_id1, t0.user_id AS user_id2, t0.user_id AS user_id3 FROM user_languages t0 WHERE t0.user_id = ?
array(1) {
  [0]=&amp;gt;
  string(1) &lt;span class=&quot;code-quote&quot;&gt;&quot;2&quot;&lt;/span&gt;
}
array(1) {
  [0]=&amp;gt;
  NULL
}
SELECT t0.user_language_id AS user_language_id1, t0.user_id AS user_id2, t0.user_id AS user_id3 FROM user_languages t0 WHERE t0.user_id = ?
array(1) {
  [0]=&amp;gt;
  string(1) &lt;span class=&quot;code-quote&quot;&gt;&quot;3&quot;&lt;/span&gt;
}
array(1) {
  [0]=&amp;gt;
  NULL
}

...
&lt;/pre&gt;
&lt;/div&gt;&lt;/div&gt;

&lt;p&gt;Need result:&lt;/p&gt;
&lt;div class=&quot;code panel&quot; style=&quot;border-width: 1px;&quot;&gt;&lt;div class=&quot;codeContent panelContent&quot;&gt;
&lt;pre class=&quot;code-java&quot;&gt;SELECT t0.user_id AS user_id1, t0.email AS email2 FROM users t0
SELECT u0_.user_language_id AS user_language_id0, u0_.user_id AS user_id1, u0_.user_id AS user_id2 FROM user_languages u0_ WHERE u0_.user_id IN (1, 2, 3)
&lt;/pre&gt;
&lt;/div&gt;&lt;/div&gt;</description>
                <environment></environment>
            <key id="12634">DDC-1149</key>
            <summary>Optimize OneToMany and ManyToMany without join</summary>
                <type id="2" iconUrl="http://www.doctrine-project.org/jira/images/icons/issuetypes/newfeature.png">New Feature</type>
                                <priority id="3" iconUrl="http://www.doctrine-project.org/jira/images/icons/priorities/major.png">Major</priority>
                    <status id="3" iconUrl="http://www.doctrine-project.org/jira/images/icons/statuses/inprogress.png">In Progress</status>
                    <resolution id="-1">Unresolved</resolution>
                    <security id="10000">All</security>
                        <assignee username="beberlei">Benjamin Eberlei</assignee>
                                <reporter username="morfi">Andrey Kolyshkin</reporter>
                        <labels>
                    </labels>
                <created>Thu, 12 May 2011 09:01:18 +0000</created>
                <updated>Sat, 30 Mar 2013 19:18:40 +0000</updated>
                                    <version>Git Master</version>
                                                <component>ORM</component>
                        <due></due>
                    <votes>5</votes>
                        <watches>6</watches>
                        <comments>
                    <comment id="15827" author="beberlei" created="Thu, 12 May 2011 09:58:46 +0000"  >&lt;p&gt;Sure you are on git master? this should be optimized already with fetch=EAGER&lt;/p&gt;</comment>
                    <comment id="15828" author="morfi" created="Thu, 12 May 2011 11:15:22 +0000"  >&lt;p&gt;Attach test file&lt;/p&gt;

&lt;p&gt;I run&lt;/p&gt;
&lt;div class=&quot;code panel&quot; style=&quot;border-width: 1px;&quot;&gt;&lt;div class=&quot;codeContent panelContent&quot;&gt;
&lt;pre class=&quot;code-java&quot;&gt;git clone git:&lt;span class=&quot;code-comment&quot;&gt;//github.com/doctrine/doctrine2.git
&lt;/span&gt;git clone git:&lt;span class=&quot;code-comment&quot;&gt;//github.com/doctrine/common.git
&lt;/span&gt;git clone git:&lt;span class=&quot;code-comment&quot;&gt;//github.com/doctrine/dbal.git&lt;/span&gt;
&lt;/pre&gt;
&lt;/div&gt;&lt;/div&gt;

&lt;p&gt;and run testDoctrine.php&lt;/p&gt;

&lt;p&gt;Result&lt;/p&gt;
&lt;div class=&quot;code panel&quot; style=&quot;border-width: 1px;&quot;&gt;&lt;div class=&quot;codeContent panelContent&quot;&gt;
&lt;pre class=&quot;code-java&quot;&gt;
SELECT t0.user_id AS user_id1 FROM users t0

SELECT t0.post_id AS post_id1, t0.user_id AS user_id2 FROM posts t0 WHERE t0.user_id = ?

array(1) {
  [0]=&amp;gt;
  string(1) &lt;span class=&quot;code-quote&quot;&gt;&quot;1&quot;&lt;/span&gt;
}
array(1) {
  [0]=&amp;gt;
  NULL
}
SELECT t0.post_id AS post_id1, t0.user_id AS user_id2 FROM posts t0 WHERE t0.user_id = ?

array(1) {
  [0]=&amp;gt;
  string(1) &lt;span class=&quot;code-quote&quot;&gt;&quot;2&quot;&lt;/span&gt;
}
array(1) {
  [0]=&amp;gt;
  NULL
}
SELECT t0.post_id AS post_id1, t0.user_id AS user_id2 FROM posts t0 WHERE t0.user_id = ?

array(1) {
  [0]=&amp;gt;
  string(1) &lt;span class=&quot;code-quote&quot;&gt;&quot;3&quot;&lt;/span&gt;
}
array(1) {
  [0]=&amp;gt;
  NULL
}
&lt;/pre&gt;
&lt;/div&gt;&lt;/div&gt;</comment>
                    <comment id="16571" author="guilhermeblanco" created="Mon, 10 Oct 2011 17:44:07 +0000"  >&lt;p&gt;Please instead of using fetch=&quot;EAGER&quot;, please use fetch=&quot;EXTRA_LAZY&quot;. It would fix your issue.&lt;br/&gt;
I have successfully tested this situation in 2.2-DEV and it works like a charm. =)&lt;/p&gt;</comment>
                    <comment id="19895" author="fludimir" created="Mon, 25 Mar 2013 20:39:03 +0000"  >&lt;p&gt;Doctrine ORM 2.3.3  (Symfony2.2) - using LAZY or EXTRA_LAZY fetch mode there are only one query for:&lt;/p&gt;
 &lt;div class=&quot;code panel&quot; style=&quot;border-width: 1px;&quot;&gt;&lt;div class=&quot;codeContent panelContent&quot;&gt;
&lt;pre class=&quot;code-java&quot;&gt;$users = $em-&amp;gt;getRepository(&apos;User&apos;)-&amp;gt;findAll();&lt;/pre&gt;
&lt;/div&gt;&lt;/div&gt;

&lt;p&gt;but additional &lt;b&gt;users_count&lt;/b&gt; queries for&lt;/p&gt;
&lt;div class=&quot;code panel&quot; style=&quot;border-width: 1px;&quot;&gt;&lt;div class=&quot;codeContent panelContent&quot;&gt;
&lt;pre class=&quot;code-java&quot;&gt;foreach($users as $user) $user-&amp;gt;languages-&amp;gt;toArray()&lt;/pre&gt;
&lt;/div&gt;&lt;/div&gt;

&lt;p&gt;And if use fetch EAGER - for some reason there are &lt;b&gt;2 x users_count&lt;/b&gt; queries , ie each query&lt;/p&gt;
&lt;div class=&quot;code panel&quot; style=&quot;border-width: 1px;&quot;&gt;&lt;div class=&quot;codeContent panelContent&quot;&gt;
&lt;pre class=&quot;code-java&quot;&gt;SELECT t0.post_id AS post_id1, t0.user_id AS user_id2 FROM posts t0 WHERE t0.user_id = ?&lt;/pre&gt;
&lt;/div&gt;&lt;/div&gt;
&lt;p&gt;with unique user_id executed twice&lt;/p&gt;</comment>
                </comments>
                    <attachments>
                    <attachment id="10991" name="testDoctrine.php" size="1544" author="morfi" created="Thu, 12 May 2011 11:15:22 +0000" />
                </attachments>
            <subtasks>
        </subtasks>
        </item>
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