elasticsearch remove custom analyzer / filter

Question

I'm new to Elasticsearch and I was wondering if it's possible to delete a custom analyzer or a custom filter from an index.

For example, imagine the following index settings:

    "settings" : {
        "analysis": {
            "filter":{
                "filter_metaphone":{
                    "encoder": "metaphone",
                    "type": "phonetic",
                    "replace": "false"
                },
                "filter_unused":{
                    "type": "edgeNGram",
                    "max_gram": "10",
                    "min_gram": "1" 
                }
            },
            "analyzer":{
                "name":{
                    "type": "custom",
                    "filter": ["filter_metaphone"],
                    "tokenizer": "standard"
                }
            }
        }   
    }

Is there any way to delete the filter "filter_unused" via curl without removing and creating the index with a new settings configuration?

what happens if you just re-post it without the filter_unused? — mconlin
– mconlin, Commented Nov 10, 2013 at 13:48
looking at the ES code I only see GET and POST methods in the REST analyze actions, no DELETE. — mconlin
– mconlin, Commented Nov 10, 2013 at 13:55
stackoverflow.com/questions/12367877/… Here you can see how to change analyzer settings of existing index. — slawek
– slawek, Commented Jul 9, 2015 at 15:40

Ricardo · Accepted Answer · 2022-11-08 20:18:36Z

4

After setting all values to null, the analyzer has disappeared for me (ES 6.8, 7.x, 8.x)

{
  "analysis": {
    "analyzer": {
      "my_search_analyzer" : {
        "filter" : null,
        "tokenizer" : null
      }
    }
  }
}

See Reset an index setting doc.

edited Nov 8, 2022 at 20:18

Ricardo

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answered Jan 8, 2021 at 14:05

Oleg Skr

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2 Comments

loretoparisi Over a year ago

This will not work anymore in ES 7.14. Setting to null will cause an exception.

Ricardo Over a year ago

@loretoparisi that is not correct; it still works on 7.x or 8.x; you may need to set the fields that are using this analyzer to use another one or null before resetting the analyzer. Think like deleting a row in a DB table where other table has with foreign keys linked to this row...

Andy · Accepted Answer · 2014-06-18 00:33:16Z

1

No, there is not a way to delete one specific analyzer from an index setting at this time.

You could add new analyzers though. That API is documented here.

http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/indices-update-settings.html#indices-update-settings

answered Jun 18, 2014 at 0:33

Andy

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1 Comment

estoy Over a year ago

looks like for ES5.x.x this has been solved with elastic.co/guide/en/elasticsearch/reference/current/…

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