{ "type": "record", "name": "Campaign", "separatorChar": "\t", "fields": [ { "name": "campaign_id", "type": "string", "doc": "campaign id, from mysql primary key" }, { "name": "platform", "type": "string", "doc": "ios or adr" }, { "name": "package_name", "type": "string", "doc": "package name" } ] }