Generic API call
Calls an Elasticsearch API when no dedicated endpoint is defined. Use generic_request with Url, RequestMethod, and optional Body or Headers. The example shows a CREATE INDEX-style PUT request.
SELECT * FROM generic_request
WITH(Url='/my_index_name'
, RequestMethod='PUT'
-- , Body='{}'
-- , Headers='X-Hdr1:aaa || x-HDR2: bbb'
, Meta='acknowledged:bool'
)