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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-1872" style="color: #3b73af; text-decoration: none">Re: Create a proper API for sorting definitions</a> </span> </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: 10px 0 0; margin-top: 0">First analysis</p> <h2 style="margin: 10px 0 0; font-size: 20px; font-weight: normal; line-height: 1.500; margin: 40px 0 0"><a name="HibernateSearchandsorting" style="color: #3b73af; text-decoration: none"></a>Hibernate Search and sorting</h2> <p style="margin: 10px 0 0"><tt>FullTextQuery.setSort( )</tt> is the main entry point. <tt>Sort</tt> is the Lucene object.</p> <p style="margin: 10px 0 0"><tt>DistanceSortField</tt> is used for spatial:</p>
<ul class="alternate" type="square">
<li>Coordinates or lat, long</li>
<li>fieldname</li>
<li>reverse</li>
</ul> <h2 style="margin: 10px 0 0; font-size: 20px; font-weight: normal; line-height: 1.500; margin: 40px 0 0"><a name="Lucenesort" style="color: #3b73af; text-decoration: none"></a>Lucene sort</h2> <p style="margin: 10px 0 0">Default: RELEVANCE, INDEXORDER</p> <p style="margin: 10px 0 0">Otherwise Sort is a List of SortField:</p>
<ul class="alternate" type="square">
<li>defaults like score and docid</li>
<li>field name</li>
<li>field type (with sorting type - up to custom Comparator)</li>
<li>reverse or not</li>
<li>missingValue (for string: first or last ; for numeric ; excluded others)</li>
<li>FieldComparatorSource</li>
</ul> <p style="margin: 10px 0 0">subclasses:</p>
<ul class="alternate" type="square">
<li>SortedNumericSortField: (for numeric multi values, compare with the min or max value)</li>
<li>SortedSetSortField: (for multi values, compare with the min or max value)</li>
</ul> <h2 style="margin: 10px 0 0; font-size: 20px; font-weight: normal; line-height: 1.500; margin: 40px 0 0"><a name="Elasticsearchsort" style="color: #3b73af; text-decoration: none"></a>Elasticsearch sort</h2> <p style="margin: 10px 0 0"><a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/search-request-sort.html" class="external-link" rel="nofollow" style="color: #3b73af; text-decoration: none">https://www.elastic.co/guide/en/elasticsearch/reference/current/search-request-sort.html</a></p> <p style="margin: 10px 0 0">=> JSON structure</p>
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<pre class="code-java" style="margin: 10px 0 0; margin-top: 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
{
<span class="code-quote" style="color: #009100">"sort"</span> : [
{ <span class="code-quote" style="color: #009100">"post_date"</span> : {<span class="code-quote" style="color: #009100">"order"</span> : <span class="code-quote" style="color: #009100">"asc"</span>}},
<span class="code-quote" style="color: #009100">"user"</span>,
{ <span class="code-quote" style="color: #009100">"name"</span> : <span class="code-quote" style="color: #009100">"desc"</span> },
{ <span class="code-quote" style="color: #009100">"age"</span> : <span class="code-quote" style="color: #009100">"desc"</span> },
<span class="code-quote" style="color: #009100">"_score"</span>
],
<span class="code-quote" style="color: #009100">"query"</span> : {
<span class="code-quote" style="color: #009100">"term"</span> : { <span class="code-quote" style="color: #009100">"user"</span> : <span class="code-quote" style="color: #009100">"kimchy"</span> }
}
}
</pre>
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</div> <p style="margin: 10px 0 0">_doc is the most efficient<br> sort mode for multi values: min, max, sum, avg, median</p> <h3 style="margin: 10px 0 0; font-size: 16px; line-height: 1.563; margin: 30px 0 0"><a name="Sortonnested" style="color: #3b73af; text-decoration: none"></a>Sort on nested</h3>
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<pre class="code-java" style="margin: 10px 0 0; margin-top: 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
<span class="code-quote" style="color: #009100">"sort"</span> : [
{
<span class="code-quote" style="color: #009100">"offer.price"</span> : {
<span class="code-quote" style="color: #009100">"mode"</span> : <span class="code-quote" style="color: #009100">"avg"</span>,
<span class="code-quote" style="color: #009100">"order"</span> : <span class="code-quote" style="color: #009100">"asc"</span>,
<span class="code-quote" style="color: #009100">"nested_path"</span> : <span class="code-quote" style="color: #009100">"offer"</span>,
<span class="code-quote" style="color: #009100">"nested_filter"</span> : {
<span class="code-quote" style="color: #009100">"term"</span> : { <span class="code-quote" style="color: #009100">"offer.color"</span> : <span class="code-quote" style="color: #009100">"blue"</span> }
}
}
}
]
</pre>
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</div> <p style="margin: 10px 0 0">nested_path seems a constraint that could be guessed?<br> nested_filter allows to filter out the nested elements filtered by</p> <h3 style="margin: 10px 0 0; font-size: 16px; line-height: 1.563; margin: 30px 0 0"><a name="Missingvalue" style="color: #3b73af; text-decoration: none"></a>Missing value</h3> <p style="margin: 10px 0 0">_last, _first, custom value (used as the value used to sort when the field is missing)</p> <h3 style="margin: 10px 0 0; font-size: 16px; line-height: 1.563; margin: 30px 0 0"><a name="Ignoringunmappedfield" style="color: #3b73af; text-decoration: none"></a>Ignoring unmapped field</h3> <p style="margin: 10px 0 0">{<br> "sort" : [<br> { "price" : </p> {"unmapped_type" : "long"} <p style="margin: 10px 0 0"> },<br> ],<br> "query" : {<br> "term" : </p> { "user" : "kimchy" } <p style="margin: 10px 0 0"> }<br> }</p> <p style="margin: 10px 0 0">pretends the documents have a field type of long and the field is always empty in the documents.</p> <h3 style="margin: 10px 0 0; font-size: 16px; line-height: 1.563; margin: 30px 0 0"><a name="Geodistancesorting" style="color: #3b73af; text-decoration: none"></a>Geo distance sorting</h3> <p style="margin: 10px 0 0">distance_type: sloppy_arc, arc, plane<br> unit: km<br> point as lat, long or geohash</p> <p style="margin: 10px 0 0">Multiple geo points can be passed as an array containing any geo_point format<br> The final distance for a document will then be min/max/avg (defined via mode) distance of all points contained in the document to all points given in the sort request.</p> <h3 style="margin: 10px 0 0; font-size: 16px; line-height: 1.563; margin: 30px 0 0"><a name="sortbyscript" style="color: #3b73af; text-decoration: none"></a>sort by script</h3> <h3 style="margin: 10px 0 0; font-size: 16px; line-height: 1.563; margin: 30px 0 0"><a name="trackscoreevenifnotsortedbyscore" style="color: #3b73af; text-decoration: none"></a>track score even if not sorted by score</h3> <p style="margin: 10px 0 0">"track_scores": true</p> </td>
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