Due to AWS migration I have to migrate from ElasticSearch to OpenSearch. The OpenSearch will be provisioned by AWS OpenSearch Service.

The existing documents in ES index has parent/child relationship created using join field type. I don't see such mapping type in the OpenSearch documentation.

Question: How can I define parent/child relationship in OpenSearch?

UPDATED: The currently used ES version is 6.8. As for migration, the preference is to use the latest OpenSearch version.

CodePudding user response：

It's not in the documentation, but there's code related to join field type, e.g. ParentJoinFieldMapperTests.java, so I think it's there for you to try.