How to perform automatic update_by_query on an index?

Elastic Stack Elasticsearch
1

Here is an example:

POST /test-scholarship/_doc
{
  "student": "George",
  "grade": 98
}

I want to add a new field (scholarship) to the above doc.

POST /test-scholarship/_update_by_query
{
  "script": "ctx._source.scholarship = 'Yes'",
  "query": {
    "grade": {
      "row": {
        "gte": 95
      }
    }
  }
}

Then

GET /test-scholarship/_search
returns:

"hits" : [
  {
    "_index" : "test-scholarship",
    "_type" : "_doc",
    "_id" : "ORawAm0BHjv4SKuqp9C8",
    "_score" : 1.0,
    "_source" : {
      "student" : "George",
      "grade" : 98,
      "scholarship" : "Yes"
    }
  }
]

Question:

  • How can I automate this update_by_query task? I don't want to run this query every once in a while to update my documents with a new field, I want to run this query automatically on my data every day. Is it possible?

I appreciate any feedback or suggestions.

2

Bump

3

You can not automate it but might be able to run the calculation on ingest through an ingest pipeline you associate with the index.

4

What is the name of the process called? Not quite sure what to search for.

5

Start here: https://www.elastic.co/guide/en/elasticsearch/reference/current/pipeline.html

Then add processors

1 Like
6

Solution:

Update by query using Python Elasticsearch:

if self.es.indices.exists(index = i):
    for q in queries:
        try:
            self.es.update_by_query(index = i, body = q)
        except ConflictError:
            self.es.indices.refresh(index = i)
            self.es.update_by_query(index = i, body = q)

Add a cron to run the script on your machine automatically (locally) or put it in docker and run it in ECS task on a cloud service like AWS.

7

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