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<td class="page-title-pattern-first-line " style="padding: 0; border-collapse: collapse; font-family: Arial, sans-serif; font-size: 14px; padding-top: 10px"> <a href="https://hibernate.atlassian.net/browse/HSEARCH" style="color: #3b73af; text-decoration: none">Hibernate Search</a> / <a href="https://hibernate.atlassian.net/browse/HSEARCH-3275" style="color: #3b73af; text-decoration: none"><img src="cid:jira-generated-image-avatar-30a20cfa-67b8-48d3-9831-fdccce219438" height="16" width="16" border="0" align="absmiddle" alt="Task" style="vertical-align: text-bottom"></a> <a href="https://hibernate.atlassian.net/browse/HSEARCH-3275" style="color: #3b73af; text-decoration: none">HSEARCH-3275</a> </td>
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<td style="vertical-align: top;; padding: 0; border-collapse: collapse; padding-right: 5px; font-size: 20px; line-height: 30px; mso-line-height-rule: exactly" class="page-title-pattern-header-container"> <span class="page-title-pattern-header" style="font-family: Arial, sans-serif; padding: 0; font-size: 20px; line-height: 30px; mso-text-raise: 2px; mso-line-height-rule: exactly; vertical-align: middle"> <a href="https://hibernate.atlassian.net/browse/HSEARCH-3275" style="color: #3b73af; text-decoration: none">Search 6 groundwork - Move to a stable implementation of Lucene spatial support</a> </span> </td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Issue Type:</th>
<td class="has-icon" style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <img src="cid:jira-generated-image-avatar-30a20cfa-67b8-48d3-9831-fdccce219438" height="16" width="16" border="0" align="absmiddle" alt="Task" style="vertical-align: text-bottom"> Task </td>
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<td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> Unassigned </td>
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<td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> lucene, spatial </td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Created:</th>
<td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> 27/Aug/2018 23:20 PM </td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Fix Versions:</th>
<td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> 6.0.0.Beta-backlog </td>
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<td class="has-icon" style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <img src="cid:jira-generated-image-static-major-4f622e9c-4d5d-4269-8d55-69d843f1d52a" height="16" width="16" border="0" align="absmiddle" alt="Major" style="vertical-align: text-bottom"> Major </td>
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<td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <a class="user-hover" rel="yrodiere" id="email_yrodiere" href="https://hibernate.atlassian.net/secure/ViewProfile.jspa?name=yrodiere" style="color:#6c797f;; color: #3b73af; text-decoration: none">Yoann Rodière</a> </td>
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<td class="text-paragraph-pattern-container mobile-resize-text " style="padding: 0; border-collapse: collapse; padding: 0 0 10px"> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0; margin-top: 0"><b>WARNING</b>: Do this in 6.0, to avoid backward compatibility problems that would arise if we changed the implementation in 6.1.</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">It seems the Lucene implementations trades precision for performance; see in particular how <tt>org.apache.lucene.geo.GeoEncodingUtils#encodeLatitudeCeil</tt> tries to fit a 64-bit double into 32 bits.<br> We should check whether this precision loss could be acceptable for most users, and if so document it, and if not we should consider alternatives.</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">Also, the Lucene geospatial feature is located in a “sandbox” jar that looks like it could not be maintained the same way as the rest of Lucene (maybe they would break APIs, remove it, …)</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">DECISION: use another implementation. We could:</p>
<ul>
<li>Copy the Elasticsearch code to Hibernate Search</li>
<li>Copy the Elasticsearch code to the Lucene project and ask this to be promoted to the “core” code.</li>
</ul> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">Let’s ask the Elasticsearch team how they feel about this. If they are okay with moving their code to Lucene, let’s help with that. If not, let’s just copy it to Hibernate Search (license-wise, this should be okay).</p> </td>
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