POST /connection/column/ creates and updates Connection Column objects via external_id. If an object with a matching external_id exists, it is updated with the given payload. Otherwise, it is created. Note that this method is not allowed for non-virtual servers.
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curl --request POST \
--url https://alation_domain/integration/v2/bi/server/server_id/connection/column/ \
--header 'accept: application/json' \
--header 'content-type: application/json'