Pivot Table With No 'Rows' Does Not Render

[adam-james-v]

Describe the bug

Moving all fields out of Rows and into Columns (leaving the Measures alone) results in no table being rendered.

To Reproduce

1. Create a new question with:

• Products
• Summarize Count of Rows
• By 'Category' and 'Created At: Year'

2. Change the visualization to 'Pivot'
3. In the Pivot Table Options, move the field from Rows to Columns

Expected behavior

The Table should render, as it does when you have all of the fields in Rows and none in Columns.
eg:

Or, it should present a warning explaining why it will not render (perhaps this is somewhat expected behaviour, as the table could become very large horizontally in such a configuration).

Logs

No response

Information about your Metabase installation

Latest from Master (after v50), though it's highly likely this exists in many versions back.

Severity

P2

Additional context

No response