[Improve] [Connector-V2] [connector-elasticsearch]Sink Support inserting parent-child document data in versions prior to ES 6. x

[magic-fh]

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Description

The ES cluster we are currently using is based on ES5.6, and when inserting parent-child document type data into ES, the existing Elasticsearch connector cannot meet the requirements. In this case, we need the Elasticsearch connector to support the insertion of data from child documents and accurately route it to the parent document.

Usage Scenario

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[zhangshenghang]

this is a good idea. In addition to parent-child documents, it is also necessary to support netsted type data writing.