Finding duplicate documents or its count based on some field names

narinder_izap · December 28, 2013, 5:16am

Hi All,

    I need to know, if Elasticsearch has some feature to find the

duplicate documents or documents counts if I want to see how many documents
are having same values against two or more fields. I can do that for one
field using facets, but what if I need to do it against more than one
field. For Example : Suppose I have following doc in Es

doc 1 :

{
name : abc
age:22
country:usa
gender:male
}

doc 2 :

{
name:xyz
age:27
country:usa
gender:male
}

doc 3:

{
name:xyz
age:22
country:india
gender:female
}

doc 4
{
name:abc
age:22
country:usa
gender:female
}

So now my requirement is to find all doc having same age and same country,
So that doc1 and doc4 are duplicate for me, OR In simple words, I want
to have unique clause on a single fields or composite fields key. Is this
possible??

Please let me know if its possible using Elasticsearch, as I think it is
very important feature for me.

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jprante · December 28, 2013, 1:14pm

If you can use 1.0.0.Beta2, aggregations might be a solution.

Demo:

gist.github.com

https://gist.github.com/jprante/8159379

aggs.sh


curl -XDELETE 'localhost:9200/test'

curl -XPUT 'localhost:9200/test' -d '
{
    "mappings" : {
       "_default_": {
           "properties" : {
               "name" : { "type" : "string" },
               "age" : { "type" : "integer" },

This file has been truncated. show original

output.txt

{"ok":true,"acknowledged":true}{"ok":true,"acknowledged":true}{"ok":true,"_index":"test","_type":"data","_id":"1","_version":1}{"ok":true,"_index":"test","_type":"data","_id":"2","_version":1}{"ok":true,"_index":"test","_type":"data","_id":"3","_version":1}{"ok":true,"_index":"test","_type":"data","_id":"4","_version":1}{"ok":true,"_shards":{"total":10,"successful":5,"failed":0}}{
  "took" : 5,
  "timed_out" : false,
  "_shards" : {
    "total" : 5,
    "successful" : 5,
    "failed" : 0
  },
  "hits" : {
    "total" : 4,

This file has been truncated. show original

Jörg

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Ivan · December 30, 2013, 5:07pm

More Like This could work, especially if using non-analyzed fields:

--
Ivan

On Sat, Dec 28, 2013 at 5:14 AM, joergprante@gmail.com <
joergprante@gmail.com> wrote:

If you can use 1.0.0.Beta2, aggregations might be a solution.

Demo:

Elasticsearch aggregations demo · GitHub

Jörg

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Yann_Barraud · December 31, 2013, 12:57pm

Hi,

You can check this :

Le samedi 28 décembre 2013 06:16:16 UTC+1, Narinder Kaur a écrit :

Hi All,
    I need to know, if Elasticsearch has some feature to find the 
duplicate documents or documents counts if I want to see how many documents
are having same values against two or more fields. I can do that for one
field using facets, but what if I need to do it against more than one
field. For Example : Suppose I have following doc in Es

doc 1 :

{
name : abc
age:22
country:usa
gender:male
}

doc 2 :

{
name:xyz
age:27
country:usa
gender:male
}

doc 3:

{
name:xyz
age:22
country:india
gender:female
}

doc 4
{
name:abc
age:22
country:usa
gender:female
}

So now my requirement is to find all doc having same age and same country,
So that doc1 and doc4 are duplicate for me, OR In simple words, I want
to have unique clause on a single fields or composite fields key. Is this
possible??

Please let me know if its possible using Elasticsearch, as I think it is
very important feature for me.

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spinscale · January 1, 2014, 8:20pm

Hey,

another very simple solution could be a terms facet, using a script field,
which simply concatenates the two fields you want to check for. See

--Alex

On Tue, Dec 31, 2013 at 1:57 PM, Yann Barraud yann.barraud@gmail.comwrote:

Hi,

You can check this :

GitHub - YannBrrd/elasticsearch-entity-resolution: Elasticsearch entity resolution plugin based on Duke

Le samedi 28 décembre 2013 06:16:16 UTC+1, Narinder Kaur a écrit :
Hi All,
    I need to know, if Elasticsearch has some feature to find the
duplicate documents or documents counts if I want to see how many documents
are having same values against two or more fields. I can do that for one
field using facets, but what if I need to do it against more than one
field. For Example : Suppose I have following doc in Es

doc 1 :

{
name : abc
age:22
country:usa
gender:male
}

doc 2 :

{
name:xyz
age:27
country:usa
gender:male
}

doc 3:

{
name:xyz
age:22
country:india
gender:female
}

doc 4
{
name:abc
age:22
country:usa
gender:female
}

So now my requirement is to find all doc having same age and same
country, So that doc1 and doc4 are duplicate for me, OR In simple words,
I want to have unique clause on a single fields or composite fields key. Is
this possible??

Please let me know if its possible using Elasticsearch, as I think it is
very important feature for me.
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