Elasticsearch _bulk NOOP

explanation

This fails, you cannot update something that is not there

{"update": {"_index":"banana","_id":"dolly"}}
{"doc": {"hello":"dolly"}}

This succeeds, but will always update, even if unchanged.
The version count will increase, and the value of "result" will be "updated"

{"index": {"_index":"banana","_id":"kitty"}}
{"doc": {"hello":"kitty"}

This will insert or update as appropriate.  If there are no changes, the value of "result" will be "noop"

{"update": {"_index":"banana","_id":"world"}}
{"doc": {"hello":"world"}, "doc_as_upsert": true}

run.sh

curl -XPUT localhost:9200/banana 
curl -XPOST localhost:9200/banana/_bulk -H Content-Type:application/x-ndjson --data-binary "@update"

update

{"update": {"_index":"banana","_id":"dolly"}}
{"doc": {"hello":"dolly"}}
{"update": {"_index":"banana","_id":"world"}}
{"doc": {"hello":"world"}, "doc_as_upsert": true}
{"index": {"_index":"banana","_id":"kitty"}}
{"doc": {"hello":"kitty"}, "doc_as_upsert": true}