Dataset programs: backfill, refresh

Reference for Dataset, one group of Dataset programs.

Dataset.backfill

Backfill reads one Source of a Dataset over a past date range and records every value observed in it. Verb page.

Text

do: return await $.Dataset.backfill(input)

Emits Dataset.backfilled.

Inputs

Input	Type	Required	Description
`dataset`	Dataset	required	The Dataset.
`source`	Source	required	The Source to read.
`from`	`date`	required	The first day of the range.
`to`	`date`	required	The last day of the range.

Returns

Output	Type	Required	Description
`dataset`	Dataset	required	The Dataset, with the range filled.

Refuses when

Check	Error	Fix	Then call
The key is valid, but its scopes do not allow this operation	`forbidden`	Use a key whose scopes cover the operation, or ask an owner of the namespace to grant them.	None.
`dataset` is missing, or is not a dataset	`invalid-input`	Send `dataset` as a dataset, then call it again.	None.
`source` is missing, or is not a source	`invalid-input`	Send `source` as a source, then call it again.	None.
`from` is missing, or is not a date	`invalid-input`	Send `from` as a date, then call it again.	None.
`to` is missing, or is not a date	`invalid-input`	Send `to` as a date, then call it again.	None.
The `Idempotency-Key` was sent before with another operation or other input	`idempotency-mismatch`	Send a new key for new input; reuse a key only to retry the same request.	None.

Example

JSON

{
  "name": "do",
  "arguments": {
    "code": "return await $.Dataset.backfill({ dataset: 'dataset_UDQXk0KsJB', source: 'source_DIdhfB6mF5', from: '2026-10-22', to: '2026-10-22' })",
    "idempotencyKey": "ratebook-dataset-backfill-1"
  }
}

Dataset.refresh

Refresh re-reads a Dataset’s Sources now instead of on schedule, and records what changed. Verb page.