# What's the difference for score theory and sort principle between elasticsearch6.8.0 and elasticsearch5.4.3?

**URL:** <https://discuss.elastic.co/t/whats-the-difference-for-score-theory-and-sort-principle-between-elasticsearch6-8-0-and-elasticsearch5-4-3/198145>\
**Category:** Elasticsearch\
**Created:** [September 5, 2019, 3:35am UTC](https://discuss.elastic.co/t/whats-the-difference-for-score-theory-and-sort-principle-between-elasticsearch6-8-0-and-elasticsearch5-4-3/198145 "2019-09-05T03:35:36Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![sunweiconfidence](https://avatars.discourse-cdn.com/v4/letter/s/58956e/32.png) [@sunweiconfidence](https://discuss.elastic.co/u/sunweiconfidence)\
**Post date:** [September 5, 2019, 3:35am UTC](https://discuss.elastic.co/t/whats-the-difference-for-score-theory-and-sort-principle-between-elasticsearch6-8-0-and-elasticsearch5-4-3/198145/1 "2019-09-05T03:35:36Z")

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hi,  
i want to know what's the difference for score theory and sort principle between elasticsearch6.8.0 and elasticsearch5.4.3? i use match clause and \_all in elasticsearch5.4.3 as below:  
{  
"query" : {  
"match" : {  
"\_all" : {  
"query" : "app",  
"operator" : "AND"  
}  
}  
}  
}  
and multi\_match with cross\_fields in elasticsearch6.8.0  
{  
"query" : {  
"multi\_match" : {  
"query" : "and",  
"type" : "cross\_fields",  
"operator" : "and"  
}  
}  
}  
but finally return result is not same according to \_score to sort

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<div class="post-metadata">

**Author:** ![sunweiconfidence](https://avatars.discourse-cdn.com/v4/letter/s/58956e/32.png) [@sunweiconfidence](https://discuss.elastic.co/u/sunweiconfidence)\
**Post date:** [September 9, 2019, 7:08am UTC](https://discuss.elastic.co/t/whats-the-difference-for-score-theory-and-sort-principle-between-elasticsearch6-8-0-and-elasticsearch5-4-3/198145/2 "2019-09-09T07:08:56Z")

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```
for elasticsearch5.4.3 i use clause to validate search api to get the explain result:

 {
            "index": "testforms",
            "valid": true,
            "explanation": "+function score (_all:custom, functions: [{filter(TitleFieldAC:customer), function [org.elasticsearch.common.lucene.search.function.WeightFactorFunction@fe2b450d]}{filter(BestInClass:yes), function [org.elasticsearch.common.lucene.search.function.WeightFactorFunction@cfab450d]}]) #(+StatusFilter:Published +IsDeleted:[0 TO 0])"
        }

but in elasticsearch6.8.0 i get below result:
        {
            "index": "testforms",
            "valid": true,
            "explanation": "+function score ((Metadata-ReviewAssignTo_relationsvalue.StaffId:customer | 
			BestInClass:custom | 
			TitleFieldAC:customer | 
			StatusFilter:customer | 
			functions: [{org.elasticsearch.common.lucene.search.function.FunctionScoreQuery$FilterScoreFunction@ab1688f4}{org.elasticsearch.common.lucene.search.function.FunctionScoreQuery$FilterScoreFunction@8ccee3c1}{org.elasticsearch.common.lucene.search.function.FunctionScoreQuery$FilterScoreFunction@b28704de}{org.elasticsearch.common.lucene.search.function.FunctionScoreQuery$FilterScoreFunction@45c10606}{org.elasticsearch.common.lucene.search.function.FunctionScoreQuery$FilterScoreFunction@41e10606}{org.elasticsearch.common.lucene.search.function.FunctionScoreQuery$FilterScoreFunction@874e5aa1}{org.elasticsearch.common.lucene.search.function.FunctionScoreQuery$FilterScoreFunction@be25c100}]) #(+StatusFilter:Published +IsDeleted:[0 TO 0])"
        }

i want to know what's the difference between elasticsearch5.4 and elasticsearch6.8, and why change it, any benefits using elasticsearch6.x new function?
```

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<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [October 7, 2019, 7:18am UTC](https://discuss.elastic.co/t/whats-the-difference-for-score-theory-and-sort-principle-between-elasticsearch6-8-0-and-elasticsearch5-4-3/198145/3 "2019-10-07T07:18:16Z")

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