.. _auto_dataset_generate_uid:

*DATASET GENERATE UID*
======================

Appends a new column of universally unique identifiers (UUIDs) to an existing dataset, one UUID per row. Use this worker whenever rows in a dataset need a stable, unique identity key before downstream joins or tracking steps.

When to use
-----------

Classification: **process**.

Tagged: ``column``, ``dataset``, ``generate``, ``uid``, ``unique_id``, ``uuid``.

Inputs
------

.. list-table::
   :header-rows: 1
   :widths: 20 20 20 20 20 20

   * - Label
     - ID
     - Type
     - Default
     - Required
     - Description
   * - Dataset
     - dataset_1
     - dataset
     - —
     - 
     - Input dataset to which the UID column will be appended; accepts any tabular dataset — leave empty if the dataset will be wired at runtime.
   * - New Col
     - new_col
     - text
     - UID
     - 
     - Name of the new UUID column added to the output dataset; defaults to "UID" — change only when a different column name is required by downstream workers.

Outputs
-------

.. list-table::
   :header-rows: 1
   :widths: 20 20 20 20

   * - Label
     - ID
     - Type
     - Description
   * - New Dataset
     - dataset_uid
     - dataset
     - Copy of the input dataset with an additional column (named per new_col) containing a unique UUID string for every row.

Disciplines
-----------

- data.dataset.transform

Runnable example
----------------

A runnable example is registered for this worker. Open the example workflow on the d3VIEW canvas: `/api/workflow/example?id=dataset_generate_uid <https://www.d3view.com/api/workflow/example?id=dataset_generate_uid>`_

.. raw:: html

   <hr style="margin-top:2em">
   <p style="font-size:11px;color:#888">
   Auto-generated from <code>transformation</code> schema. Worker id: <code>dataset_generate_uid</code>. Schema hash: <code>fd17aba9a10d</code>. Hand-curated docs in <code>workerexamples/</code> override this page when present.
   </p>