"""
prod.appannie.int.data.pipeline.unified
|
|--unified
|  |
|  |--dimension--|
|  |-------------|country_code/date etc
|  |--metrics  --|
|  |-------------|country_code/date etc
|

"market_code","device_code","country_code","date","category_id"

core methodology: dimension complement

life_start:
life_end:
identifier: timestamp
"""
