Update By Query in Elasticsearch using Java

Question

I’m currently using Elasticsearch V2.3.1. I want to use the following Elasticsearch query in Java.

POST /twitter/_update_by_query
{
  \"script\": {
    \"in         


        

Answer 1

As of ES 2.3, the update by query feature is available as the REST endpoint _update_by_query but nor for Java clients. In order to call this endpoint from your Java client code, you need to include the reindex module in your pom.xml, like this

<dependency>
    <groupId>org.elasticsearch.module</groupId>
    <artifactId>reindex</artifactId>
    <version>2.3.2</version>
</dependency>

Then you need to include this module when building your client:

clientBuilder.addPlugin(ReindexPlugin.class);

Finally you can call it like this:

UpdateByQueryRequestBuilder ubqrb = UpdateByQueryAction.INSTANCE.newRequestBuilder(client);

Script script = new Script("ctx._source.List = [\"Item 1\",\"Item 2\"]");

BulkIndexByScrollResponse r = ubqrb.source("twitter")
    .script(script)
    .filter(termQuery("user", "kimchy"))
    .get();

UPDATE

If you need to specify the type(s) the update should focus on, you can do so:

ubqrb.source("twitter").source().setTypes("type1");
BulkIndexByScrollResponse r = ubqrb.script(script)
    .filter(termQuery("user", "kimchy"))
    .get();

Answer 2

In ES 7.9 this also works using UpdateByQueryRequest

Map<String, Object> map = new HashMap<String, Object>();

UpdateByQueryRequest updateByQueryRequest = new UpdateByQueryRequest("indexName");
updateByQueryRequest.setConflicts("proceed");
updateByQueryRequest.setQuery(new TermQueryBuilder("_id", documentId));
Script script = new Script(ScriptType.INLINE, "painless",
        "ctx._source = params", map);
updateByQueryRequest.setScript(script);