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<img id="email-avatar" src="https://hibernate.onjira.com/secure/useravatar?ownerId=emmanuel&avatarId=10641" alt="" height="48" width="48" border="0" align="left" style="padding:0;margin: 0 16px 16px 0;" />
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<a class="user-hover" rel="emmanuel" id="email_emmanuel" href="https://hibernate.onjira.com/secure/ViewProfile.jspa?name=emmanuel" style="color:#6c797f;">Emmanuel Bernard</a>
created <img src="https://hibernate.onjira.com/images/icons/improvement.gif" height="16" width="16" border="0" align="absmiddle" alt="Improvement"> <a style='color:#6c797f;text-decoration:none;' href='https://hibernate.onjira.com/browse/OGM-211'>OGM-211</a>
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<a style='color:#6c797f;text-decoration:none;' href='https://hibernate.onjira.com/browse/OGM-211'><strong>Limit redundancy when storing association information in a non embedded way</strong></a>
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<strong style="font-weight:normal;color:#505050;">Issue Type:</strong>
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<img src="https://hibernate.onjira.com/images/icons/improvement.gif" height="16" width="16" border="0" align="absmiddle" alt="Improvement"> Improvement
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<strong style="font-weight:normal;color:#505050;">Assignee:</strong>
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Unassigned </td>
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<strong style="font-weight:normal;color:#505050;">Components:</strong>
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<td style="color:#000000;font-family:Arial,FreeSans,Helvetica,sans-serif;font-size:12px;padding:0 0 10px 0;width:100%;">
core, datastore </td>
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<strong style="font-weight:normal;color:#505050;">Created:</strong>
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<td style="color:#000000;font-family:Arial,FreeSans,Helvetica,sans-serif;font-size:12px;padding:0 0 10px 0;width:100%;">
06/Jul/12 6:36 AM
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<strong style="font-weight:normal;color:#505050;">Description:</strong>
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<p style='margin-top:0;margin-bottom:10px;'>With the work done in IN_ENTITY (MongoDB), we now see that we don't really require to store as much data as we are doing today in regular Associations.<br/>
Plus the structure is questionable redundancy wise (using MongoDB's example)</p>
<div class="code panel" style="border-width: 1px;"><div class="codeContent panelContent">
<pre class="code-java">{
<span class="code-quote">"_id"</span> : ObjectId(<span class="code-quote">"4ff6c04fa8fa2db9fd76f34b"</span>),
<span class="code-quote">"columns"</span> : { <span class="code-quote">"Cloud_id"</span> : <span class="code-quote">"da3d8f5d-f024-4c6a-b813-81a7a643a08b"</span> },
<span class="code-quote">"rows"</span> : [ {
<span class="code-quote">"table"</span> : <span class="code-quote">"Cloud_SnowFlake"</span>,
<span class="code-quote">"columns"</span> : {
<span class="code-quote">"Cloud_id"</span> : <span class="code-quote">"da3d8f5d-f024-4c6a-b813-81a7a643a08b"</span>,
<span class="code-quote">"producedSnowFlakes_id"</span> : <span class="code-quote">"27b678d2-0f17-43bc-801e-2a714f1cca8c"</span>
},
<span class="code-quote">"tuple"</span> : {
<span class="code-quote">"Cloud_id"</span> : <span class="code-quote">"da3d8f5d-f024-4c6a-b813-81a7a643a08b"</span>,
<span class="code-quote">"producedSnowFlakes_id"</span> : <span class="code-quote">"27b678d2-0f17-43bc-801e-2a714f1cca8c"</span>
}
},
{
<span class="code-quote">"table"</span> : <span class="code-quote">"Cloud_SnowFlake"</span>,
<span class="code-quote">"columns"</span> : {
<span class="code-quote">"Cloud_id"</span> : <span class="code-quote">"da3d8f5d-f024-4c6a-b813-81a7a643a08b"</span>,
<span class="code-quote">"producedSnowFlakes_id"</span> : <span class="code-quote">"cc80b5db-0db3-47a0-96fb-dbc70793c832"</span>
},
<span class="code-quote">"tuple"</span> : {
<span class="code-quote">"Cloud_id"</span> : <span class="code-quote">"da3d8f5d-f024-4c6a-b813-81a7a643a08b"</span>,
<span class="code-quote">"producedSnowFlakes_id"</span> : <span class="code-quote">"cc80b5db-0db3-47a0-96fb-dbc70793c832"</span>
}
} ],
<span class="code-quote">"table"</span> : <span class="code-quote">"Cloud_SnowFlake"</span>
}</pre>
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<p style='margin-top:0;margin-bottom:10px;'>We could rethink that to only store the relevant bits of information and use _id in a similar way as we do now for entities since <a href="https://hibernate.onjira.com/browse/OGM-174" title="Composite id fail on MongoDB: MongoDBDialect only takes the first id column into account and force _id"><del>OGM-174</del></a>.<br/>
The new structure could be</p>
<div class="code panel" style="border-width: 1px;"><div class="codeContent panelContent">
<pre class="code-java">{
<span class="code-quote">"_id"</span> : <span class="code-quote">"da3d8f5d-f024-4c6a-b813-81a7a643a08b"</span>,
<span class="code-comment">// If a composite key, it would be
</span> <span class="code-comment">// <span class="code-quote">"_id"</span>: { <span class="code-quote">"Cloud_id"</span> : <span class="code-quote">"da3d8f5d-f024-4c6a-b813-81a7a643a08b"</span>, <span class="code-quote">"foo_id"</span>: 3}
</span>
<span class="code-comment">//table is only present <span class="code-keyword">if</span> we are not using GLOBAL_COLLECTION
</span> <span class="code-quote">"table"</span> : <span class="code-quote">"Cloud_SnowFlake"</span>,
<span class="code-quote">"rows"</span> : [
{
<span class="code-quote">"producedSnowFlakes_id"</span> : <span class="code-quote">"27b678d2-0f17-43bc-801e-2a714f1cca8c"</span>
},
{
<span class="code-quote">"producedSnowFlakes_id"</span> : <span class="code-quote">"cc80b5db-0db3-47a0-96fb-dbc70793c832"</span>
} ]
}</pre>
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<strong style="font-weight:normal;color:#505050;">Project:</strong>
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<a style="color:#6c797f;" href="https://hibernate.onjira.com/browse/OGM">Hibernate OGM</a>
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<strong style="font-weight:normal;color:#505050;">Priority:</strong>
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<img src="https://hibernate.onjira.com/images/icons/priority_major.gif" height="16" width="16" border="0" align="absmiddle" alt="Major"> Major
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<strong style="font-weight:normal;color:#505050;">Reporter:</strong>
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<a class="user-hover" rel="emmanuel" id="email_emmanuel" href="https://hibernate.onjira.com/secure/ViewProfile.jspa?name=emmanuel" style="color:#6c797f;">Emmanuel Bernard</a>
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