Add a UUID column - Amazon Glue
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Add a UUID column

When you add a UUID (Universally Unique Identified) column, each row will be assigned a unique 36-character string.

To add a UUID transform node in your job diagram
  1. Open the Resource panel and then choose UUID to add a new transform to your job diagram. The node selected at the time of adding the node will be its parent.

  2. (Optional) On the Node properties tab, you can enter a name for the node in the job diagram. If a node parent is not already selected, then choose a node from the Node parents list to use as the input source for the transform.

  3. (Optional) On the Transform tab, you can customize the name of the new column. By default it will be named "uuid".