TransformPreviewResponse

POST /pipelines/transforms/preview result — a limited-row sample of the transform's output. Nothing is persisted.

columnsstring[]required

Output column names, in order

rowsobject[]required

Result rows (<= limit)

row_countRow Count (integer)required

Number of rows returned

truncatedTruncated (boolean)required

True if the result had more rows than the requested limit

TransformPreviewResponse

{
  "columns": [
    "string"
  ],
  "rows": [
    {}
  ],
  "row_count": 0,
  "truncated": true
}