.. _auto_dataset_get_map_string:

*GET MAP STRING FOR A SET OF COLUMNS*
=====================================

Generates a map-string representation for a specified set of columns in a dataset. Use this worker when you need to produce a column-keyed mapping string (e.g., for downstream joins, renaming, or lookup operations) from an existing dataset.

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

Classification: **process**.

Tagged: ``column_mapping``, ``dataset_transform``, ``map_string``, ``transformations``.

Inputs
------

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

   * - Label
     - ID
     - Type
     - Default
     - Required
     - Description
   * - Dataset
     - dataset
     - dataset
     - —
     - 
     - Input dataset whose columns will be mapped; accepts any tabular dataset object — leave unconnected only if columns are supplied via another upstream path.
   * - Columns
     - cols
     - scalar
     - —
     - 
     - Comma-separated list of column names (quoted strings) from the input dataset for which the map string should be generated; supports multi-select from the dataset's available columns.

Outputs
-------

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

   * - Label
     - ID
     - Type
     - Description
   * - Mapped String
     - dataset_get_map_string
     - dataset
     - Dataset containing the generated map string keyed by the selected columns, ready for use in downstream mapping or lookup workers.

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_get_map_string <https://www.d3view.com/api/workflow/example?id=dataset_get_map_string>`_

.. raw:: html

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   Auto-generated from <code>transformation</code> schema. Worker id: <code>dataset_get_map_string</code>. Schema hash: <code>488106f042bc</code>. Hand-curated docs in <code>workerexamples/</code> override this page when present.
   </p>