- kind: raw_column
  name: <string>  # raw column name (required)
  type: INT_COLUMN  # data type (required)
  required: <boolean>  # whether null values are allowed (default: false)
  min: <int>  # minimum allowed value (optional)
  max: <int>  # maximum allowed value (optional)
  values: <[int]>  # an exhaustive list of allowed values (optional)
  compute:
    executors: <int>  # number of spark executors (default: 1)
      driver_cpu: <string>  # CPU request for spark driver (default: 1)
      driver_mem: <string>  # memory request for spark driver (default: 500Mi)
      driver_mem_overhead: <string>  # off-heap (non-JVM) memory allocated to the driver (overrides mem_overhead_factor) (default: min[driver_mem * 0.4, 384Mi])
      executor_cpu: <string>  # CPU request for each spark executor (default: 1)
      executor_mem: <string>  # memory request for each spark executor (default: 500Mi)
      executor_mem_overhead: <string>  # off-heap (non-JVM) memory allocated to each executor (overrides mem_overhead_factor) (default: min[executor_mem * 0.4, 384Mi])
      mem_overhead_factor: <float>  # the proportion of driver_mem/executor_mem which will be additionally allocated for off-heap (non-JVM) memory (default: 0.4)
​
- kind: raw_column
  name: <string>  # raw column name (required)
  type: FLOAT_COLUMN  # data type (required)
  required: <boolean>  # whether null values are allowed (default: false)
  min: <float>  # minimum allowed value (optional)
  max: <float>  # maximum allowed value (optional)
  values: <[float]>  # an exhaustive list of allowed values (optional)
  compute:
    executors: <int>  # number of spark executors (default: 1)
      driver_cpu: <string>  # CPU request for spark driver (default: 1)
      driver_mem: <string>  # memory request for spark driver (default: 500Mi)
      driver_mem_overhead: <string>  # off-heap (non-JVM) memory allocated to the driver (overrides mem_overhead_factor) (default: min[driver_mem * 0.4, 384Mi])
      executor_cpu: <string>  # CPU request for each spark executor (default: 1)
      executor_mem: <string>  # memory request for each spark executor (default: 500Mi)
      executor_mem_overhead: <string>  # off-heap (non-JVM) memory allocated to each executor (overrides mem_overhead_factor) (default: min[executor_mem * 0.4, 384Mi])
      mem_overhead_factor: <float>  # the proportion of driver_mem/executor_mem which will be additionally allocated for off-heap (non-JVM) memory (default: 0.4)
​
- kind: raw_column
  name: <string>  # raw column name (required)
  type: STRING_COLUMN  # data type (required)
  required: <boolean>  # whether null values are allowed (default: false)
  values: <[string]>  # an exhaustive list of allowed values (optional)
  compute:
    executors: <int>  # number of spark executors (default: 1)
      driver_cpu: <string>  # CPU request for spark driver (default: 1)
      driver_mem: <string>  # memory request for spark driver (default: 500Mi)
      driver_mem_overhead: <string>  # off-heap (non-JVM) memory allocated to the driver (overrides mem_overhead_factor) (default: min[driver_mem * 0.4, 384Mi])
      executor_cpu: <string>  # CPU request for each spark executor (default: 1)
      executor_mem: <string>  # memory request for each spark executor (default: 500Mi)
      executor_mem_overhead: <string>  # off-heap (non-JVM) memory allocated to each executor (overrides mem_overhead_factor) (default: min[executor_mem * 0.4, 384Mi])
      mem_overhead_factor: <float>  # the proportion of driver_mem/executor_mem which will be additionally allocated for off-heap (non-JVM) memory (default: 0.4)

- kind: raw_column
  name: column1
  type: INT_COLUMN
  required: true
  min: 0
  max: 10
​
- kind: raw_column
  name: column2
  type: FLOAT_COLUMN
  required: true
  min: 1.1
  max: 2.2
​
- kind: raw_column
  name: column3
  type: STRING_COLUMN
  required: false
  values: [a, b, c]